JPH081486A - Method and apparatus for cutting blades - Google Patents

Abstract

(57) [Abstract] [Purpose] When cutting a single plate with veneer lace, veneer slicer, etc., to ensure stable cutting, ensure a swift and reliable sufficient thickness at the cutting edge of the blade. [Structure] A bed provided with a fixing base for fixing a blade is provided with a traveling body which is reciprocally movable in a longitudinal direction thereof by a drive mechanism, and the traveling body is provided with respect to each of the front and back sides of the blade. A pair of rotary whetstones that can be advanced and retracted and the angle is freely changed on the front side and the back side of the blade by shifting the phase in the longitudinal direction of the blade, or by arranging a plurality of rotating grindstones in parallel and arranging a plurality of blades on the front and back sides of the blade. Along with being equipped with a phase shift in the direction, on one side of the traveling body or at a position adjacent to the rotary grindstone for the front and back of the blade, a buff member for the front and back of the blade is provided on the blade of the blade. A control that is installed so that it can be brought into and out of contact with the front surface and the back surface of the blade, and automatically controls the amount of advance and retreat and the angle of inclination of the rotary grindstone according to the amount to be ground, the contact angle with the blade and the number of chamfers. It has a mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when grinding various long blades such as veneer laces and veneer slicers, cuts raw wood in a stable state from the blades after the main blade surface is ground by a knife grinder for rough grinding. The present invention relates to a method and an apparatus for grinding a blade to be obtained.

[0002]

2. Description of the Related Art Generally, as a conventional concept for this kind of long blade, a cross section perpendicular to the longitudinal direction is shown in FIG.
As shown in 3, the back of the blade is a flat surface, and the angle from the blade tip to the blade surface is an acute angle of about 23 degrees. At the initial stage of forming the blade tip, first attach a rough grindstone. It is to grind by the rough grinder knife grinder.

After rough grinding, a rough ground surface with chipping on the blade surface side, that is, when the raw wood is cut in the state of fine sawtooth generated over the longitudinal direction, the convex portion of the saw cuts the surface of the veneer. In order to remove the cause of knife marks that leave streaky scratches, the polishing marks on the back side of the blade and the burr generated from the front side of the blade toward the back side of the blade, use a whetstone with a finer count than the whetstone used during rough grinding. It was hand-sharpened or mechanically sharpened, and a blade having a sharp cross section perpendicular to the longitudinal direction from the blade edge to the blade edge was obtained.

However, according to the blade having the above-described shape, since the thickness of the cutting edge portion is thin and sharp, the position of the cutting edge line is not stable in the course of cutting the raw wood, and when the raw wood is cut, nodes such as nodes existing in the raw wood are cut. When a hard portion appears, a large load is applied to the cutting edge as compared with the normal cutting state, so the blade edge is pressed and vibrates outward of the raw wood, and in the case where it is particularly remarkable, the portion peels off, In addition, as a reaction to it, it will vibrate inwardly toward the raw wood, and this vibration state will be more likely to occur as the tip of the cutting edge is sharper, and during this time, the veneer veneer to be cut will be thick and thin. It has been a cause of spillage and blade spillage due to hard parts such as knots, gravel, and jars.

For this reason, the applicant of the present invention previously disclosed in Japanese Patent Laid-Open No. 63-
No. 99163 gazette, "Super finishing control method of cutting edge" is applied, and a super finishing control method of finishing the cutting edge portion of the cutting edge of the cutting edge into a curved surface that approximates an R shape by a set of tangent lines is proposed, and the sharpness of the cutting edge itself is maintained. However, by increasing the wall thickness of the tip portion of the cutting edge, the above-mentioned drawbacks were solved, and a temporary result was obtained. However, even with this blade proposed by the applicant of the present application, although there is a result that the blade holding state of the blade is good, the cutting edge line is not constant because the cutting edge of the cutting edge is still sharp. ,
It has not been possible to eliminate even the drawback that the cutting edge is likely to vibrate with respect to the cutting surface of the raw wood.

In view of this point, the applicant of the present invention has proposed that a curved surface which approximates an R-shape by a set of tangent lines not only from the front surface side of the blade but also from the back surface side of the blade is disclosed in Japanese Unexamined Patent Publication No. 337906/1993. "Cutting tool and its grinding method and device",
A cross-section orthogonal to the longitudinal direction is proposed for a long blade for woodworking, in which both front and back surfaces are multi-faced in an arc shape from the blade edge portion toward the blade base direction, and a grinding method and device thereof, and a blade edge portion of the blade is sufficient. While maintaining the wall thickness, while maintaining the sharpness of the blade itself, while preventing the vibration of the cutting edge line when cutting raw wood,
By reducing the sliding contact between the veneer veneer immediately after cutting and the back side of the blade, we achieved results such as prevention of back crack expansion.

[Problems to be Solved by the Invention]

However, in the above-mentioned publication proposed by the applicant of the present invention, one embodiment is adopted in which a bracket projecting from the traveling body is used as its pivotal support position in order to change the contact angle of the rotary grindstone to the cutting edge during multiple cutting. Although an example is described, according to this pivotal position, the cross-section orthogonal to the longitudinal direction of the cutting tool is chamfered in the shape of an arc from the cutting edge portion toward the cutting edge direction in the process of chamfering. Every time the blade width is changed and an arbitrary land width (grinding width) is formed, the distance between the cutting edge of the cup-shaped rotary grindstone, which is the point of action, and the cutting edge changes, so the angle of the rotary grindstone is changed. The amount of grinding was set for each time to correct the amount of change in distance, work efficiency was poor, and the contact surface of the rotary grindstone to the cutting edge was not constant, resulting in sequential movement. .

Further, as described above, the blade after rough polishing shown in FIG. 23 has a flat back surface and an acute angle of about 23 degrees from the blade tip to the blade surface. In order to obtain the wall thickness W1, in the first step grinding to finish the cutting edge angle around 30 degrees, which is exemplified in the above publication, in order to grind away from the cutting edge tip toward the cutting edge direction to set the cutting edge line position to H1. In the same publication, it is described that a rotary grindstone is reciprocated 14 times back and forth to grind, but it is possible to deal with uncut raw wood due to blade chipping, blade pressing, or deterioration of raw wood circumstances in recent years. Therefore, the blade itself is often made of a hard material, and in order to obtain a similar cutting edge angle of about 30 degrees, the applicant of the present invention carried out,
The rotary grindstone could not be ground unless it was reciprocated back and forth 100 times, impeding work efficiency. Furthermore, when it is desired to obtain a larger land width at the tip of the blade according to the type of raw wood and the cutting conditions of the raw wood, the blade angle of the tip of the blade is made larger, and therefore, for example, the wall thickness W2 as shown in FIG. It is necessary to grind and remove a considerable amount from the tip of the cutting edge toward the cutting edge direction, and the position of the cutting edge line must be significantly lowered to H2. The work efficiency was reduced as in the above description.

Further, as described above, with respect to the blade pushed portion in which a certain portion in the longitudinal direction of the blade is locally bent and pushed to the back side of the blade, the blade pushed portion is generated in the usual process. Grind away from the blade front side to the base end in the blade direction, or correct only the pressed portion of the blade that can be visually confirmed from the back side of the blade to correct it so that the tip of the blade becomes almost flat, and then sharpen from the front side of the blade. In this case, since the blade surface is rough-ground, chipping may occur, but
When the blade is pushed to the back side, it is removed from the tip of the cutting edge by the amount of grinding due to rough grinding from the front side of the blade, but since the grinding is not performed from the back side, the pressed portion is not completely removed and it is fine. It may remain as a convex portion, and when finishing grinding with a rotary grindstone on the back side of the blade by the above method, the rotary grindstone for finishing itself consists of a fine count, so it is not possible to grind the convex portion and ride backwards Therefore, there is a new defect that the cutting edge grinding work cannot be performed in the vicinity of the convex portion. Furthermore, for the blade pressed portion that cannot be visually confirmed, only the grinding work accompanying the wear of the blade from the blade surface side during rough polishing is performed, and if the convex portion described above remains in the blade after rough polishing, Similar results are obtained.

[0010]

In order to solve the above-mentioned problems, the present invention provides a rotary grindstone for a blade surface which can be freely changed in angle on the blade surface side of a blade fixed to a fixed base, and an arbitrary blade back side. A rotary grindstone for the back of the blade that is freely changeable in angle, to a traveling body that moves along the longitudinal direction of the fixed base, by a rotary grindstone equipped so as to face each other by shifting the phase in the longitudinal direction of the blade, After cutting the front and back surfaces of the blade in an arc shape, the buff member copies the front and back surfaces of the blade to finish,
A thick veneer veneer can be obtained by increasing the wall thickness of the tip of the blade and providing a good cutting surface during cutting of raw wood. The width of the land can be adjusted by equipping the moving bodies that move along the direction in parallel so that they face each other with a phase shift in the longitudinal direction of the blade, or by changing the angle of each rotary grindstone with the tip of the blade of the blade as the center of rotation. Is formed reliably and in a short time.

As a device therefor, a bed provided with a fixing base for fixing a cutting tool is provided with a traveling body which can be reciprocally moved in a longitudinal direction thereof by a driving mechanism, and the traveling body has a blade table and a blade. Rotating whetstones that can move forward and backward and change their angles with respect to each of the back sides are equipped with the blade front side and the blade back side being out of phase with each other in the longitudinal direction of the blade, and also on one side of the running body or for the blade surface and blade. A buff member for the front and back of the blade is installed at a position adjacent to the rotary grindstone for the back side so that it can be brought into contact with and separated from the blade front surface and the back surface of the blade, and the amount of advance and retreat and the tilt angle of the rotary grindstone are set. , A control mechanism that automatically controls according to the amount to be ground, the contact angle with the blade and the number of chamfers, and further, the bed equipped with a fixing base for fixing the blade is driven in the longitudinal direction A moving body that can be reciprocally moved by the mechanism is provided, and the running On the body, a rotating grindstone that can advance and retreat and change the angle with respect to each of the front and back of the blade of the blade, and a plurality of wheels with different numbers by shifting the phase in the longitudinal direction of the blade on each of the front and back sides of the blade. It is equipped in parallel with each other, and is provided with a control mechanism for automatically controlling the amount of advance and retreat and the angle of inclination of the rotary grindstone according to the amount to be ground, the contact angle with the blade and the number of chamfers. .

[0012]

[Operation] A rotary grindstone for the front and back of the blade, which is freely adjustable on the front side of the blade, centered on the tip of the blade fixed along the longitudinal direction of the fixed base, and a back of the blade, on the rear side of the blade, the angle of which can be freely changed. Equipped with a rotating grindstone for use so as to face the traveling body moving along the longitudinal direction of the fixed base so as to be out of phase with each other in the longitudinal direction of the cutting tool, and to make the front and back surfaces of the cutting tool into an arc shape by this pair of rotating grinding wheels. When performing multiple chamfering or this multi-step grinding, a plurality of rotary grindstones for blade surfaces with different counts can be freely changed on the blade front side of the tool and a plurality of freely adjustable angles on the back side of the blade. A rotating grindstone for the back of the blade with a different count is installed in parallel on the traveling body that moves along the longitudinal direction of the fixed base so that they face each other with a phase shift in the longitudinal direction of the blade, and both sides of the blade are mounted. You can make multiple cuts in an arc shape, In the process of buffing, both the front and back sides of the blade are copied and finished, and the land width is formed reliably and in a short time while increasing the wall thickness at the tip of the cutting edge to prevent vibration of the cutting edge line during cutting of raw wood. By obtaining a blade that can be prevented, a good veneer veneer having a good cut surface can be obtained.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a blade grinding apparatus for grinding a blade according to the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 is a fixed base for pressing and holding the blade 2 in an upright posture by a blade holder 4 along the longitudinal direction on an upper portion of the center of an elongated bed 3 having at least the length of the blade 2 to be ground. A moving member 5 such as a slide rail or a linear way is laid on the upper portions of both sides of the bed 3 in the longitudinal direction thereof, and a gate-shaped running body 7 is provided via linear blocks 6 attached to the lower portions of the four corners. Put up,
This traveling body 7 is equipped with a drive mechanism 8. The drive mechanism 8 is a fluid motion, a screw motion, or a prime mover 9 is attached to a lower portion of a traveling body 7 as shown in the drawing, and a chain wheel 10 of the prime mover 9 is attached to the drive mechanism 8.
The bed 3 is engaged with the chain 12 held in a stretched state by being locked by springs 11 at both longitudinal ends of the bed 3, and the traveling body 7 on the bed 3 is reciprocated along the longitudinal direction of the bed 3. It is possible to move. Further, the drive mechanism 8 supports a pair of auxiliary sheaves 13 on both sides close to the sheave 10, and meshes the auxiliary sheaves 13 with the chain 12, thereby vibrating when the sheave 10 rotates. We are taking preventive measures.

A pair of semi-circular discs 14 each having a substantially semi-circular shape centered on the tip of the cutting edge of the cutting tool 2 which is upright and pressed is attached to the traveling body 7 in the longitudinal direction of the cutting tool 2. On the inner sides of the pair of semi-circular plates 14 facing each other, a regulation copying part 15 having a V shape on one side and a semi-circular copying part 16 having a planar shape on the other side have a radius smaller than that of the semi-circular plate 14. Between the semi-circular plates 14, which are formed small, a pair of substrates 17 and 18 positioned so as to face each other with respect to the front side a and the back side b of the blade 2 are provided at both front ends thereof. The regulation copying portion 1 is formed by three copying rollers 19 that are arranged to face each other and have a V shape on one side and a ring shape on the other side.
5. It is supported by the copying section 16 in a sandwiched state. And
An angle setting device 20 for changing the inclination angle of the substrates 17 and 18 is provided on the opposite side of the substrates 17 and 18, respectively.

The mechanism of the angle setting device 20 disposed on the board 17 on the front side of the blade and the board 18 on the back side of the blade is the same in this embodiment. The mechanism will be described below. The board 17 on the front side of the blade and the board 18 on the back side of the blade supported by the copying roller 19 in a sandwiched state are
A shaft 21 is supported on the rear part thereof in parallel with the longitudinal direction of the blade 2, and the drive of a prime mover 22 installed on the upper part of each of the substrates 17 and 18 is driven by the shaft 21 via a linkage device such as a bevel gear or a worm gear. The drive is passive and this axis 2
The pinion gears 23 attached to both end portions of 1 are meshed with the rack gears 24 engraved on the outer peripheral portion of the semicircular plate 14, and the board 17 on the blade front side and the board 18 on the blade back side are
It is tiltable about the tip of the blade 2 of the blade 2 which is upright and pressed and held.

A rotation angle detecting device 25 including an encoder, a linear transformer, etc. is installed on each shaft 21 to detect the inclination angle of each of the substrates 17 and 18 which is tilted with the rotation. . Further, a prime mover 26 is installed on each of the substrates 17 and 18 at a substantially central position thereof, and two pulleys 27 are attached to a drive shaft of the prime mover 26 with a space therebetween, and the prime mover 26 is a boundary. As a pair, a pair of bearings 28 are installed at arbitrary intervals along the longitudinal direction of the blade 2, and pulleys 30 are slidable in the axial direction with respect to the rotary shafts 29 whose rear portions are supported by the bearings 28. A belt 31 is suspended between the pulleys 27 attached to the drive shaft. Therefore, a pair of rotating shafts 29 are supported on the boards 17 and 18 in the direction of the blade 2 at positions sandwiching the prime mover 26.

Sliding guides 33 adopting a linear way are laid on a pair of tops of a guide base 32 having a substantially U-shaped cross section attached on the substrates 17 and 18. The sliding body 34, in which the front portion of the rotary shaft 29 is inserted and supported, can be moved back and forth by a biasing member 35 configured as follows. That is, a bearing 37 for inserting and supporting the rack member 36 is attached to the upper portion of the bearing 28, and the rack member 36 can be moved back and forth in the direction of the cutting edge by the drive of the motor 38, and at the tip portion of the rack member 36. The bracket 39 is fitted and the moving part 40 is attached.
The sliding portion 44 is configured by connecting the tip of the piston rod 42 of the fluid cylinder 41 attached to the upper portion of the bracket 39 to the restriction plate 43 installed at the rear portion of the sliding body 34. ing.

The rotary grindstones 45 for grinding the blade 2 are fitted to the tip ends of the pair of rotary shafts 29, respectively, and the moving portion 40 is moved.
The amount of grinding is set by the feed amount of. A grinding amount setting device 46 for setting the grinding amount is controlled by a motor 38 for driving the rack member 36, and an instruction scale of a dial indicator (not shown) has an arbitrary preset amount 47.
When it is confirmed by a proximity switch (not shown) or the like that the drive has stopped, the drive is stopped. This amount is the maximum amount of advance of each rotary grindstone 45, that is, the maximum amount by which the cutting edge can be ground. According to this, when the desired amount of grinding for each step is exceeded, the amount that can still be ground is Even if it remains, the grinding operation is interrupted, and in the actual state of the grinding operation, the grinding operation is usually finished when the main blade surface is ground.
This is to prevent the blade 2 from undulating in the longitudinal direction and excessively grinding a portion of the unevenness amount close to the rotary grindstone 45 side.

A rail member 48 is projected above the substrates 17 and 18 in the vicinity of the pair of rotary shafts 29 in parallel with the sliding direction of the rotary shafts 29. A sliding member 49 such as a linear wire is provided, the balancer 50 is suspended on the rail member 48 via the sliding member 49, and the moving unit 40 further rotates the rotary grindstone 45.
The sliding portion 44 and the balancer 50 are linked by a link 52 with the tip end of the link support member 51 protruding in the direction as a pivot point. The weight of the balancer 50 is determined by the length of the link 52 with the pivot point of the link support member 51 as a boundary.

In the above embodiment, the moving portion 40 on the substrates 17 and 18 which is slidable with respect to the blade 2 and the sliding portion 44 which supports the rotary grindstone 45 for grinding the blade 2.
The fluid cylinder 41 is connected to one side and the piston rod 42 is connected to the other side to control the grinding amount by fluid pressure, but a spring (not shown) may be used instead of this. Further, in the present embodiment, the grinding amount setting device 46 is a motor 38 that drives the rack member 36.
When it is confirmed by a proximity switch (not shown) that the dial indicator of the dial indicator has reached an arbitrary preset amount 47 controlled by, the drive is stopped. It is also possible to use an encoder, a linear transformer, or the like.

Reference numeral 53 in the figure is a detector comprising limit switches, photoelectric tubes, proximity switches, etc. attached to both ends of the traveling body 7, and 54 in the figure is between the bed 3 and the fixed base 1. The cooling water receiving gutter provided over the entire moving distance of the rotary grindstone 45.

Further, in the above embodiment, the sliding portion 44 is provided with the braking mechanism 55, and the braking mechanism 55 is one of the linear way type sliding guides 33 having both sides of the sliding body 34 as guides. And a cylinder 5 for operating the piston rod 56 by fluid pressure.
It consists of 7 and. The braking mechanism 55 employs a fluid pressure cylinder mechanism, but other than that, for example, a mechanism in which a screw is operated by a servo motor, or a mechanism in which an electromagnet is turned on and off to be locked by the plunger, The number to be installed is not limited to the above. Further, as shown in FIGS. 10 to 12, instead of the braking mechanism 55 composed of the piston rod 56 that presses one of the linear way type sliding guides 33 with the both sides of the sliding body 34 as guides, as shown in FIGS. The fluid cylinder 58 may have a built-in gripping mechanism capable of gripping the piston rod at any position inside the chamber. That is, this gripping mechanism is installed in the unit 59 located in the front part of the cylinder chamber,
A guide roller 61 is pivotally supported on the tip of a brake arm 60 that swings with one end as a fulcrum, and the guide roller 61 is engaged with a tapered brake piston 63 that is axially mounted on a piston rod 62. Of the fluid supply / discharge ports 641 and 642, when supplying fluid from one port 642 and discharging fluid from the other port 641, or closing one port 642, the coil spring 65 is wound around the brake piston 63. When the fluid is discharged from the port 641 by swinging the guide roller 61 as the brake piston 63 advances, the brake shoe 66 attached to the lower end of the brake arm 60 grips the piston rod 62 and the piston rod 62. 62 is stopped at the present position.

A support plate 68 having a pair of elongated holes 67 is attached to one side of the traveling body 7 in the traveling direction so that the height of the supporting plate 68 can be adjusted within the vertical interval of the elongated holes 67. A pair of support shafts 69 having different projecting lengths are pivotally supported at a substantially central portion of the support plate 68 in a direction orthogonal to the traveling direction, and an arm pivotally supported at the tip of the support shafts 69. At the lower end of 70 is a pair of baffles 71 made of leather, felt, etc.
Is shifted in the longitudinal direction of the blade 2, and the roll shaft 72 is rotatably supported by being connected to a prime mover 73 such as an air motor. In addition, a pressing spring 74 for urging the arm 70 in the direction of the blade is attached to substantially the center of the pair of arms 70, and a locking piece 75 protruding from the other end of the arm 70.
The piston rod 77 of the fluid cylinder 76 attached to the support plate 68 is engaged with the
The pair of buff rolls 71 can be brought into and out of contact with the blade 2 by the fluid motion.

Therefore, a pair of rotary grindstones 45 are provided on the board 17 on the front side of the blade and the board 18 on the back side of the blade, respectively, which are capable of advancing and retreating in the direction of the cutting tool 2 and having a phase shifted in the longitudinal direction of the cutting tool 2. At least one of the pair is a fine rotary grindstone 45 for finishing,
The other is a rotary grindstone 45 having a coarser count. At this time, among the plurality of rotary grindstones 45 for the front and back of the blade and the plurality of rotary grindstones 45 for the back of the blade, the rotary grindstones 45 having the same count are opposed to the blade 2 and the phase is set in the longitudinal direction of the blade 2. If they are arranged in a staggered manner, the traveling distance of the traveling body 7 during grinding of the blade 2 is short, which is advantageous. In addition, in the present embodiment, for convenience, the rotary grindstone 4 mounted on each of the substrates 17 and 18 is used.
Although the number 5 is a pair, the number thereof is not limited to the above, and two or more rotary grindstones 45 may be installed in parallel with different counts.

Next, with the apparatus of this embodiment, an example of grinding the blade 2 in which the cross section orthogonal to the longitudinal direction is a multi-chamfered surface in which the front surface of the blade and the back surface of the blade are arcuately approximated from the cutting edge portion toward the cutting edge direction Will be described based on a block diagram. In order to perform the grinding, in each of the arithmetic units 80 corresponding to the blade front side and the blade back side, the number of stages of a plurality of stages of polishing, the grinding angle at each stage, and the data of the grinding amount at that angle are incorporated in advance, An automatic control system (FIG. 15, FIG. 17, FIG. 19) that selects a grinding pattern from these data, and a storage device that inputs the number of steps, the angle, and the grinding amount for each grinding, and stores the plurality of inputs. There is a manual control system with 81 (FIGS. 16, 18, 20).

Further, there are three modes of the mechanism for detecting the grinding amount at each angle. Of these, the ones shown in FIGS. 15 and 16 are the detection movements of the detector 53 and the detection piece, or the pulse amount by the measuring instrument 82. The number of reciprocating movements of the rotary grindstone 45 is set as the number of times of the counter 83, which is simulated as the grinding amount, based on the count of. In addition, the one illustrated in FIG. 17 and FIG. 18 has a preset amount 47 in which the grinding amount is added to each contact of the dial indicator in consideration of the wear amount of the rotary grindstone 45.
And the preset amount 47 is detected by a proximity switch or the like. Further, in the example illustrated in FIGS. 19 and 20, the grinding allowance 84 of the tool 2 in the process of grinding is photographed by the video camera 85, and it is detected by the image signal 86 that the grinding allowance 84 reaches the set grinding amount. is there.

Then, the one using the image signal 86 causes the drive mechanism 8 to control the traveling body 7 to travel for at least the length of the blade 2 from one end in the longitudinal direction of the blade 2.
A time measuring device such as a timer that replaces the distance with time, or a measuring device 82 that transmits the number of pulses to obtain the movement amount and detects the position of the traveling body 7 is additionally provided.

However, when the angle of the rotary grindstone 45 set by the angle setting device 20 is fed back by the rotation angle detection device 25, the drive mechanism 8 operates so that the length of the blade 2 can be adjusted to an arbitrary length from one end in the longitudinal direction. When the grinding amount is counted by the counter 83 by reciprocating the rotary grindstone 45 every time, when the dial mark of the dial indicator reaches the preset amount 47, the image signal 86 from the video camera 85 changes the grinding allowance 84. Drive mechanism 8 once
Is stopped and the angle setting device 20 is operated to perform grinding at the next stage angle.

Next, the operation will be described. First, the blade 2 whose main blade surface has been ground by an existing knife grinder is placed in a vertical state with its cutting edge facing upward so that its tip reaches the center position of the radius of the semicircular disk 14 in a substantially arcuate shape. After the adjustment, the blade holder 4 presses and holds. In this state, first select whether the control system is automatic or manual. Usually, in a plywood factory, there is an approximate value that is empirically possessed for each raw wood supplied, and when applying the approximate value, the approximate value or each stage of approximation to the approximate value is applied. The grinding angle and the amount of grinding in each stage are stored as a plurality of data, and may be appropriately selected from those data.Also, in the case of an unused log that does not have an approximate value, a manual system is selected, It will be found by trial and error by changing the grinding angle and the grinding amount.

The number of steps on the blade surface and the back of the blade, the angle of each step, the grinding amount at the angle of each step, and the land width after grinding are different from each other. Assuming that each step is a three-step sharpening, the concrete values of the angle in each step, the grinding amount thereof, and the land width after grinding are as follows: the angle of the first step on the blade surface side is 30 degrees, If the number of times is assumed, it is about 14 times, and the land width after grinding is 5
/ 100 to 8/100 mm. Further, the angle of the second step on the blade surface side is 26 degrees, and if the numerical value of this grinding amount is simulated by the counter 83, the land width after grinding is 10/10.
It is about 0 to 15/100 mm. Further, the angle of the third step on the blade surface side is 23 ° 30 minutes, and the value of this grinding amount is counted by the counter 8
Assuming that the number of times is 3, the land width after grinding is 20 /
It is about 100 to 30/100 mm. On the other hand, the angle of the first step on the back side of the blade is 10 degrees, and if the numerical value of this grinding amount is simulated by the number of times of the counter 83, it is about 12 times, and the land width after grinding is 10
It is around / 100 mm. The angle of the second step on the back side of the blade is 5 degrees. If the numerical value of the grinding amount is simulated by the number of times of the counter 83, it is twice, and the land width after grinding is about 20/100 mm. Furthermore, the angle of the third step on the back side of the blade is 0 degrees and 10 minutes, and if the value of this grinding amount is simulated by the number of times of the counter 83, it is twice.
The land width after grinding is about 20/100 mm. Therefore, the blade edge angle of the first step after multi-face cutting is 40 degrees (30 degrees from the blade front side and 10 degrees on the blade back side), and the blade edge angle of the second step is 31 degrees (26 degrees from the blade front side and 5 on the blade back side. Angle), the cutting edge angle of the third step is 23 ° 40 minutes (23 ° 30 minutes from the blade front side and 0 ° 10 minutes on the blade back side), and the above-mentioned land width values are the blade surface and blade back. 21 and 22, it is clear that the number of times of grinding in the first step, which is simulated as the grinding amount, is smaller than that in the second step and the third step. As described above, this is due to the large amount of grinding of the tool 2 after the main blade surface is ground.

After that, by the signal of the angle setting device 20,
The prime mover 22 is driven by a required amount in order to set a grinding angle for each of the rotary grindstones 45 to the front surface portion and the back surface portion of the blade. The shaft 21 rotates in accordance with this driving, and the regulation copying portion 1 of the semicircular plate 14 is rotated.
5. The board 17 on the front side of the blade and the board 18 on the back side of the blade, which are supported by the copying roller 16 in a sandwiched state by the copying roller 19, are engaged with the pinion gear 23 on the rack gear 24 engraved on the outer peripheral portion of the semi-circular plate 14. By rotating, the tip of the blade 2 of the blade 2 which is upright and pressed is tilted by a required amount to change the angle, and this angle is detected by the rotation angle detection device 25.

Next, the grinding amount setting device 46 sets the desired grinding amount for the cutting edge. First, the prime mover 9 is driven to move the traveling body 7 to the blade surface and the rotary grindstones 45 on the back of the blade to the blade 2
Move to the front and back of the blade. At this time, since a plurality of (a pair in the illustrated example) rotary grindstones 45 having different counts are respectively provided on the blade front side substrate 17 and the blade backside substrate 18, two rotary grindstones 4 are provided on the blade front side.
5. Two rotary grindstones 45 are located on the back side of the blade so as to face the blade 2 and shift their phases in the longitudinal direction of the blade 2.
After that, all the fluid cylinders 41 of the four rotary grindstones 45
Are simultaneously actuated, fluid is supplied from each port to extend the piston rod 42 so that the pressure in the rear cylinder chamber becomes higher than that in the front cylinder chamber, and the restriction plate 43 is always moved forward. In the pressed state, the rack member 36 is advanced in the blade edge direction by driving the motor 38.

At this time, the rack member 36 is installed along the bearing 37.
When is moved forward, the piston rod 42 of the fluid cylinder 41 attached to the bracket 39 slides the sliding body 34 in which the rotary shaft 29 is inserted and inserted through the regulation plate 43 in the axial direction, and each rotary grindstone 45. After abutting against the blade surface of the blade 2 and each blade tip surface of the blade back, only the rack member 36 starts to advance with the sliding body 34 stopped at the current position. That is, even if the rotary grindstone 45 contacts the cutting edge surface of the blade 2, if the rack member 36 still moves forward, the sliding body 34 acts to move forward together with the rack member 36.
Since 4 is pressed forward by the piston rod 42 of the fluid cylinder 41 via the regulation plate 43, even if the rack member 36 moves forward, the rotary grindstone 45 remains relatively stationary while being in contact with the cutting edge surface. , The piston rod 42 with respect to the fluid cylinder 41 attached to the rack member 36.
Only will retreat. The amount of retreat of the piston rod 42 includes the amount of grinding for attaching the blade to the cutting edge portion, and the expected amount including the difference in the fine waviness and unevenness that normally exist when the main blade surface is ground. This is the maximum grinding amount for attaching the blade to the cutting edge.

Further, by setting the angle of the substrates 17 and 18, the substrates 17 and 18 are inclined from the current state, and the members constituting the rotary grindstone 45 and the sliding portion 44 try to slide on the sliding portion 44 by their own weight. However, the balancer 50 on the rail member 48 protruding from the upper end of one side of the substrates 17 and 18
However, the support member 61 slides on the rail member 48 in the direction in which the weight of the support member 61 is avoided, and the grinding amount for the cutting edge is kept constant.

After setting the grinding amount, the fluid is removed from the rear cylinder chamber of the fluid cylinder 41, and the piston rod 42
Is reached to the reduction limit, and the traveling mechanism 7 is temporarily returned to the standby position by the drive mechanism 8. Next, the prime mover 26 is driven to apply rotation to the rotary grindstone 45 located at the backward limit. When the chain wheel 10 is rotated with the start of driving of the drive mechanism 8, the chain wheel 10 is clamped by the auxiliary chain wheels 13 on both sides of the chain wheel 10, and the amount of suspension with respect to the chain 12 is increased. Time slippage is prevented, and the traveling body 7 smoothly moves forward. The control of the traveling body 7 is performed by detecting that the traveling body 7 has reached each end of the blade 2 by the detectors 53 provided at both ends of the traveling body 7.

When the traveling body 7 starts to move forward from one end of the blade 2 in the longitudinal direction, of the two rotary grindstones 45 provided on the front side and the back side of the blade, first, the fluid of the coarse grindstone 45 of the coarse count is used. Fluid is supplied to the rear cylinder chamber of the cylinder 41, the piston rod 42 is extended, and the rotary grindstone 45 is brought into contact with the cutting edge surface of the cutting tool 2 to start grinding,
After that, when the traveling body 7 reaches the end of the blade 2 and the detector 53 detects this, the cylinder 57 of the braking mechanism 55 is operated in synchronization with this, and the piston rod 56 is brought into pressure contact with the sliding guide 33. The sliding of the sliding body 34 is locked. Then, in this locked state, after the traveling body 7 once passes the end position, the prime mover 9 is reversely driven to return to the end position again, and when this is measured by the pulse amount of the measuring device 82, braking is performed. By releasing the lock of the mechanism 55 and moving it back from the end position to the start position, the cutting edge surface of the cutting tool 2 is ground from the blade front side and the blade back side at the same time. After that,
By repeating the above operation any number of times, for example, the cutting edge angle is 23
After roughly roughening the blade 2, the blade 2 has a back surface of the blade as a reference surface of about 30 degrees from the front side of the blade and about 1 from the back side of the blade.
Grinding and removing each by 0 degrees, the edge angle of the blade 2 is approximately 4
Form once at 0 degree.

Completion of grinding by the coarse rotary grindstone 45 is counted by the counter 83, the preset amount 47, or the image signal 86 by the video camera 85.
When the drive mechanism 8 is stopped,
The braking mechanism 55 is released, and the fluid is supplied to the front cylinder chamber of the fluid cylinder 41 of the rotary grindstone 45 having a rough blade number on the front side and the back side of the blade to reduce the piston rod 42 and the blade edge surface of the blade 2 to have a rough number. The rotary grindstone 45 is retracted. Then, the fluid is supplied to the rear cylinder chamber of the fluid cylinder 41 of the fine rotary grindstone 45 on the front and back sides of the blade to extend the piston rod 42 and contact the fine grindstone 45 of the fine grind to the cutting edge surface of the blade 2. Similar to the grinding with the coarse rotary grindstone 45, the running body 7 is repeated an arbitrary number of times to start the finish grinding from the blade front side and the blade back side at the same time.
In this finish grinding, chipping remaining on the grinding surface by the coarse grindstone 45 is removed to finish it into a mirror surface.

If the urging member 35 uses the fluid pressure of the fluid cylinder 41 while the rotating grindstone 45 moves forward or backward to reach each end of the length of the blade 2,
When the supply of the fluid to the rear chamber of the fluid cylinder 41 is stopped or the motor 38 is driven to reversely rotate the rack member 36, the rotary grindstone 45 is separated from the cutting edge surface and folded back from each end portion. Alternatively, the rotating grindstone 45 may be brought into contact with the cutting edge surface by operating in reverse to the above description. In this case, the braking mechanism 55 may not be used. Further, in this embodiment, the substrates 17 and 18 are
In the above, a moving section 40 that is movable with respect to the blade 2,
Sliding part 4 which is slidable in the same direction with respect to this moving part 40
A rotary grindstone 45 for grinding the blade 2 through 4 is assembled, and a fluid cylinder 41 is connected to one of the wheels and a piston rod 42 is connected to the other to control the grinding amount by fluid pressure. Even if it is replaced with a spring (not shown), the grinding amount is locked by the braking mechanism 55, so that the same effect can be obtained.

When the piston rod 62 of the fluid cylinder 58 having the holding mechanism shown in FIGS. 10 to 12 is directly connected to the sliding portion 44, first, the rotary grindstone 45 is moved to the rotary grindstone 45 when the blade 2 is ground. In order to generate a certain pressure, first, the piston rod 62 is extended in a state where the gripping mechanism is released, and each rotary grindstone 45 is brought into contact with the blade surface and the blade tip surface of the blade back. That is, as shown in FIG. 11, among the pair of fluid supply / discharge ports 641 and 642 of the unit 59,
When discharging fluid from one port 642 and supplying fluid from the other port 641, or by closing one port 642 and winding the coil spring 65 around the brake piston 63 to supply fluid from the port 641. The gripping state of the piston rod 62 is released by this, and the process up to this abutment has the same function as the rack member 36 of the above-mentioned embodiment, and after this abutment, the timer or the measuring instrument 82. On the basis of pulse number control by a device similar to the above, for example, a reed switch, the piston rod 62 is retracted by an arbitrary distance and once returned to the standby position as in the above embodiment, the piston rod 62 is moved from one end of the blade 2. Is extended by the above-mentioned arbitrary distance, and each rotary grindstone 45 is brought into contact with each blade surface of the blade surface and the back of the blade. Continuing the supply of fluid is generating a certain pressure to the grinding wheel 45. Therefore, when this fluid cylinder 58 is adopted, the moving part 4 of the above-mentioned embodiment is used.
Since it also serves as 0, the rack member 36 and the motor 3 that allows the rack member 36 to move back and forth in the blade edge direction.
8 is no longer necessary, and the rotary whetstone 4 is used when the blade 2 is ground.
The fluid cylinder 41 for generating a certain pressure to 5 can also be used. Further, during the grinding, while the rotary grindstone 45 reaches each end of the length of the blade 2 to move forward or backward,
As shown in FIG. 12, of the pair of fluid supply / discharge ports 641 and 642 of the unit 59, when the fluid is supplied from one port 642 and the fluid is discharged from the other port 641, or one port 642 is closed. Then, the coil spring 65 is wound around the brake piston 63 and the fluid is discharged from the port 641.
The brake shoe 66 attached to the lower end of 0 grips the piston rod 62 and locks the rotary grindstone 45 at the present position.
The braking mechanism 55 that locks the sliding movement of the sliding body 34 by pressing 6 onto the sliding guide 33 can be dispensed with.

Completion of grinding at this angle
When it is obtained from the number of times of the counter 83, the preset amount 47, or the image signal 86 from the video camera 85,
The driving mechanism 8 is once stopped, the braking mechanism 55 is released, and the angle setting device 20 of the next stage is directly connected in the automatic control system and the angle setting device 20 of the next stage is stored in the manual system via the storage device 81. By operating it, the prime mover 22 is driven by the required amount to rotate the shaft 21 in mesh with each other in order to set the grinding angle of the blade surface and the back surface of the next stage, and this angle is detected by the rotation angle detection device 25 and the angle is detected. Finish the change. Each time this angle is changed, the rail member 48 is used as described above.
The balancer 50 slides on the upper surface of the rotary grindstone 45 and the sliding portion 44, so that the weight of the members constituting the rotary grindstone 45 and the sliding portion 44 can be avoided each time, and the weight other than the predetermined amount with respect to the cutting edge can be removed.

After that, two-step polishing, three-step polishing, ...
A blade 2 having a cross section orthogonal to the longitudinal direction, which is ground from the cutting edge portion toward the cutting edge direction on both the front side a and the back side b of the blade, is approximated to an arc-shaped surface by multiple chamfering. .

As described above, the blade 2 is ground to a surface whose cross-section orthogonal to the longitudinal direction is in the direction of the blade base from the blade tip portion to the surface of the blade a and the side of the blade back b which are approximate to an arc shape by multiple chamfering. After that, a buff member is used to copy-finish both the front side a and the back side b of the blade. In this copying finish,
After first adjusting the height of the pair of baffles 71 through the support plate 68 so as to reach the front surface a and the back surface b of the blade, the traveling body 7 is positioned on one side in the longitudinal direction of the blade 2, The piston rod of the fluid cylinder attached to the support plate 68 is contracted from the extended state, and the pressing force of the pressing spring 74 is restored, so that the pair of baffle wheels 71 use the support shaft 69 as a fulcrum and the blade surface a and the blade back surface b. Abutting against each surface of. Then, while driving the prime mover 73 such as an air motor to rotate the pair of baffles 71 from the blade root direction to the blade tip direction, the traveling body 7 is reciprocated any number of times to move the blade surface,
By finishing both sides of the blade in a substantially arcuate manner, the corners of each step that remain slightly parallel to the cutting edge line after multiple cutting are removed.

The control of the traveling body 7 in this embodiment is as follows.
For convenience, it is divided into two systems, that is, the detection motion by the detectors 53 provided at both ends of the traveling body 7 and the pulse count of the measuring device 82. You can also do it.

Further, in this embodiment, the blade angle is gradually reduced from the blade edge portion to the blade edge portion, but the blade angle is gradually increased from the blade edge portion to the blade edge portion. The same effect can be obtained even by grinding. In this case, in order to form the land width from the blade 2 after the above-described rough polishing, one step polishing from the blade edge portion to the blade base portion surrounded by the diagonal line in FIG. 21, and similarly,
Although a considerable amount of grinding and removal is performed at the stage of one-step sharpening from the blade base portion to the blade edge portion surrounded by the diagonal line in FIG. 22, the rotary grindstone 45 has a certain fluid pressure, spring pressure, or the like. Since the pressure is applied to the cutting edge of the cutting tool 2 for grinding, the unit pressure of the rotating grinding wheel 45 on the cutting tool 2 decreases as the contact area between the grinding wheel 45 and the cutting tool 2 increases as the grinding progresses. The grinding amount per operation is reduced. For this reason, the method of grinding by gradually decreasing the blade edge angle from the blade edge portion toward the blade edge portion, compared to the method of gradually increasing the blade edge angle from the blade edge portion toward the blade edge portion, the number of grinding times It will be small. However, in any case, after grinding the first step with each of the plurality of rotary grindstones 45, each of the coarse grindstones for the rough side and the rotary grindstones for the back side of the blades is used. From the viewpoint of work efficiency, it is effective to use the rotary grindstones to make both sides of the cutting tool in an arc shape from the cutting edge portion toward the cutting edge direction.

Further, from the viewpoint that the part of the cutting tool 2 required for cutting the raw wood is the tip of the cutting edge, among the plurality of rotating grindstones 45, each of the rotating grindstones for rough surface of the blade and for the back of the blade is used. After cutting both the front and back surfaces of the blade 2 in a circular arc shape from the cutting edge portion toward the cutting edge direction, the fine cutting edge surface and the rotary grindstones 45 for the cutting edge are used for the cutting edge tip portions of the cutting surface of the cutting edge 2. The method of finishing grinding by an arbitrary width is effective in terms of work efficiency.

Further, in this embodiment, the board 17 on the front side of the blade and the board 18 on the back side of the blade are meshed with the pinion gear 23 on the rack gear 24 engraved on the outer peripheral portion of the semicircular plate 14, Rotating whetstone 45 for the front and back of the blade
The angle can be freely changed around the tip of the cutting edge of the blade 2, but as in the conventional case, the bracket projecting from the traveling body 7 can be used as the pivotal position to change the angle, or after the chamfering, the buff member is used. Both the front and back sides of the blade may be finished by copying.

Further, in this embodiment, a plurality of rotary grindstones 45 for the front of the blade are provided on the board 17 on the front side of the blade, a plurality of rotary grindstones 45 for the back of the blade are provided on the board 18 on the backside of the blade, and the moving parts 40 and It has been described that the boards 17 on the front and back sides of the blade and the board 18 on the back side of the blade can be integrally changed by the sliding portions 44 to freely change an arbitrary angle. Equipped with as many substrates 17 on the blade front side and substrates 18 on the blade back side as the number of the rotary grindstones 45 (one substrate for one rotary grindstone), a plurality of rotary grindstones 45 for the blade surface and for the back of the blades The plurality of rotary grindstones 45 can be independently and independently changed in arbitrary angle, or the moving part 40 and the sliding part 44 can be
It is also possible to individually incorporate them into a housing whose angle can be changed so that the front and back of the blade 2 can be independently moved forward and backward and the angle can be adjusted. Further, in the present embodiment, the baffle 71 for the front and back of the blade is mounted on one side of the traveling body 7 in the traveling direction, and the blade 2
Of the blade front surface and the back surface of the blade, the baffle 71 is installed on the board 17 on the front side of the blade, the board 18 on the back side of the blade, or on one side of a housing whose angle can be changed independently. It is also possible to allow the blade 2 to come into contact with and separate from the front and back surfaces of the blade.

Further, the plurality of rotary grindstones 45 on the front and back sides of the blade can be independently advanced and retracted with respect to the front and back sides of the blade 2 and the angles thereof can be adjusted, and the direction of the blade base of the blade 2 can be adjusted. From the blade width after the rough grinding described above, the land width can be set by arranging so that the count becomes finer in the direction from the edge to the edge, and by setting the inclination angle of each rotary grindstone 45 to be large enough to reach the edge of the edge. With respect to a considerable amount of grinding removal for forming, the rotary grindstone 45 having a coarser count and the rotary grindstone 45 having a finer count can be ground step by step toward the tip of the cutting edge. Therefore, it is not necessary to change the angle each time and repeat the sequence, such as 1-step sharpening, 2-step sharpening, 3-step sharpening.

[0050]

As described above, according to the method of the present invention,
The cross section orthogonal to the longitudinal direction is ground into a surface that approximates an arc shape by multiple chamfering from the cutting edge portion to the cutting edge portion on both the front and back sides, and because such a cutting tool, the wall thickness of the cutting edge of the cutting edge is Since it becomes thicker, it is possible to reduce the promotion of back cracking due to the sliding contact between the veneer veneer immediately after cutting and the corner portion on the back side of the blade of the cutting tool while preventing vibration of the cutting edge line during cutting of the raw wood. In particular, in the process of grinding from the cutting edge part to the cutting edge part to a surface that approximates an arc shape by multiple chamfering, if you can freely change the angle on the front side and the back side of the blade centering on the tip of the cutting edge of the cutting tool, Every time the angle is changed to form an arbitrary land width on the cutting edge, the contact surface of the cup-shaped rotating grindstone, which is the point of action, on the cutting edge becomes constant, and the contact surface of the rotating grindstone becomes the land width of the cutting edge. On the other hand, it can be made substantially uniform.

Further, as described above, regarding the chipping generated on the surface side of the blade of the blade, or the convex portion or chipping generated on the back side of the blade after the blade pressing process at the time of rough polishing, A rotary whetstone that can be moved back and forth and the angle can be freely changed for each of the front and back sides of the blade, and a plurality of them can be installed side by side by shifting the phase in the longitudinal direction of the blade on each side of the blade The work efficiency can be improved by grinding and removing with a coarse rotating grindstone and then finishing with a fine rotating grindstone. In particular, according to this method, it is possible to perform a reliable cutting operation of the cutting edge by eliminating the drawback that the above-mentioned convex portion remaining on the cutting edge cannot be ground by the rotary grindstone for finishing, and that the cutting edge gets on the contrary. Becomes

Further, when it is desired to obtain a larger land width at the tip of the cutting edge in accordance with the type of raw wood and the cutting conditions of the raw wood, in order to make the portion forming the land width a certain thickness, the direction from the tip of the cutting edge to the direction of the cutting edge should be considered. When significantly lowering the position of the cutting edge line from the cutting edge line of the tool after rough grinding, by using a large number of rotary whetstones, each of the rough whetstone table and each back whetstone After grinding the first step, it is effective from the standpoint of work efficiency to cut the front and back surfaces of the cutting tool in a circular arc from the cutting edge toward the cutting edge by using a fine grinded front and back rotary grindstone. is there.

In particular, after grinding from the cutting edge portion to the cutting edge portion to a surface that approximates an arc shape by multiple chamfering, and in the final process, the buff member traces the front and back surfaces of the blade in a substantially arc shape. If finished, the edge of the cutting edge can be made thicker and the vibration of the cutting edge line can be prevented when cutting raw wood, while the corners of each step that remain slightly parallel to the cutting edge line after multiple cutting are removed. Therefore, in the past,
The veneer veneer surface immediately after cutting and the blade front side of the blade and the edge of the blade and the veneer veneer immediately after cutting when cutting the log, damage to the veneer veneer surface caused by sliding contact with the corners remaining on the line of each step of the blade, This can be prevented by the planar sliding contact by removing the corners.

[Brief description of drawings]

FIG. 1 is a front view showing the external appearance of an apparatus according to the present invention.

FIG. 2 is a plan view showing a part of FIG.

3 is a partially cutaway enlarged front view of FIG. 1. FIG.

FIG. 4 is a partially cutaway side view of FIG.

5 is a plan view showing a main portion of FIG. 2 partially broken away.

FIG. 6 is an enlarged side view of a main part of FIG.

FIG. 7 is a front view of FIG.

FIG. 8 is an enlarged side view of a main part of the braking mechanism.

9 is a partially cutaway front view of FIG. 8. FIG.

FIG. 10 is an enlarged side view showing another embodiment of FIG.

11 is an enlarged cross-sectional view of an essential part of FIG. 10, and is an operation explanatory diagram in which the gripped state is released.

FIG. 12 is an enlarged cross-sectional view of an essential part of FIG. 10 and is an operation explanatory diagram in a grasping state.

FIG. 13 is a partially cutaway enlarged plan view showing the buff mechanism.

FIG. 14 is a front view of FIG.

FIG. 15 is a block diagram of an automatic control system using a counter.

FIG. 16 is a block diagram of a manual control system using a counter.

FIG. 17 is a block diagram of an automatic control system based on a preset amount.

FIG. 18 is a block diagram of a manual control system according to a preset amount.

FIG. 19 is a block diagram of an automatic control system based on an image signal.

FIG. 20 is a block diagram of a manual control system based on an image signal.

FIG. 21 is a schematic view showing a cross section of a cutting edge orthogonal to the longitudinal direction of a cutting tool according to the present invention, in which grinding is performed by gradually decreasing the cutting edge angle from the cutting edge portion toward the cutting edge portion.

FIG. 22 is a schematic view showing a cross section of the cutting edge orthogonal to the longitudinal direction of the cutting tool according to the present invention, in the case where grinding is performed while gradually increasing the cutting edge angle from the cutting edge portion toward the cutting edge portion.

FIG. 23 is a schematic view showing a cross section of a cutting edge of a conventional blade which is orthogonal to the longitudinal direction.

[Explanation of symbols]

1 ... Fixed stand, 2 ... Blade, 3 ... Bed, 4 ... Blade holder,
5 ... Moving member, 6 ... Linear block, 7 ... Traveling body, 8 ...
Drive mechanism, 9 ... Prime mover (for reciprocating motion of traveling body), 10 ... Chain wheel, 11 ... Spring, 12 ... Chain, 13 ... Auxiliary chain wheel, 14 ... Semi-disc, 15 ... Regulation copying section, 16 ... Copying section,
17 ... Substrate (front side), 18 ... Substrate (back side), 19 ... Copying roller, 20 ... Angle setting device, 21 ... Shaft, 22 ... Motor (for angle setting), 23 ... Pinion gear, 24 ... Rack gear, 25 ... Rotation angle Detection device, 26 ... motor (for rotating grindstone), 27 ... pulley, 28 ... bearing, 29 ... rotating shaft, 30
... pulley, 31 ... belt, 32 ... guide base, 33 ... sliding guide (linear way), 34 ... sliding body, 35 ... biasing member, 36 ... rack member, 37 ... bearing, 38 ... motor, 3
9 ... Bracket, 40 ... Moving part, 41 ... Fluid cylinder
42 ... Piston rod 43 ... Regulation plate, 44 ... Sliding part, 45 ... Rotating grindstone, 46 ... Grinding amount setting device, 47 ... Preset amount, 48 ... Rail member, 49 ... Sliding member, 50 ...
Balancer, 51 ... Link support member, 52 ... Link, 53
... Detector, 54 ... Cooling water receiving trough, 55 ... Braking mechanism, 56
... Piston rod, 57 ... Cylinder, 58 ... Fluid cylinder (holding mechanism built-in), 59 ... Unit, 60 ... Brake arm, 61 ... Guide roller, 62 ... Piston rod, 6
3 ... Brake piston, 641, 642 ... Port, 65
... Coil spring, 66 ... Brake shoe, 67 ... Oblong hole, 68 ... Support plate, 69 ... Support shaft, 70 ... Arm, 71 ...
Buff roll, 72 ... Roll shaft, 73 ... Motor (for rotating buff roll), 74 ... Pressing spring, 75 ... Locking piece, 76
... fluid cylinder (for contact and separation of baffle roll), 77 ... piston rod, 80 ... calculator, 81 ... storage device, 82 ... measuring instrument, 83 ... counter, 84 ... grinding allowance, 85 ... video camera, 86 ... image signal

Claims (23)

[Claims] 1. A rotary grindstone for the front and back of the blade fixed to the fixed base on the front side of the blade, and a rotary grindstone for the back of the blade on the rear side of the blade. To the traveling body that moves along the longitudinal direction of the fixed base, by a rotating grindstone equipped so as to face the longitudinal direction of the cutting tool so as to face each other, after cutting both sides of the cutting tool in an arc shape,
A method for grinding a blade, characterized in that both the front and back sides of the blade are copied and finished by a buff member. 2. The method for grinding a blade according to claim 1, wherein the rotary grindstones for the front and back surfaces of the blade are freely changeable about the tip of the blade of the blade. 3. A plurality of rotary grindstones for blade surfaces having different counts which are freely changeable on the blade surface side of a blade fixed to a fixed base, and a plurality of freely adjustable angles on the backside of the blade. Rotating whetstones for blade backs with different counts, running bodies that move along the longitudinal direction of the fixed base, by rotating whetstones installed in parallel so that they face each other with a phase shift in the longitudinal direction of the cutting tool. , A method of grinding a blade, characterized in that both the front and back surfaces of the blade are cut into multiple arcs. 4. The method for grinding a blade according to claim 3, wherein the plurality of rotary grindstones for the front surface of the blade and the plurality of rotary grindstones for the back of the blade are freely changeable at any angle around the tip of the blade of the blade. . 5. The method for grinding a blade according to claim 3, wherein the plurality of rotary grindstones for the front surface of the blade and the plurality of rotary grindstones for the back of the blade are integrally and arbitrarily changeable in arbitrary angles. 6. The method for grinding a cutting tool according to claim 3, wherein the plurality of rotary grindstones for the surface of the blade and the plurality of rotary grindstones for the back of the blade are independently and independently changeable in arbitrary angle. 7. Among the plurality of rotary grindstones, a first-stage cutting edge angle is ground by each rotary grindstone for a rough count blade surface and a back blade, and then each rotation for a fine count blade surface and blade back surface. 7. The method for grinding a blade according to claim 3, wherein both the front and back surfaces of the blade are rounded with a grindstone. 8. A plurality of rotary whetstones, each having a coarse number of blades for the front and back of the blade, are used to grind the front and back surfaces of the tool once in an arc shape, and then a finer number of blades and blades. 7. The method for grinding a tool according to claim 3, wherein each of the back-side rotary grindstones is used to finish-grind the tip end portions of the front and back surfaces of the tool by an arbitrary width. 9. A plurality of rotary grindstones on the front side and the back side of the blade are arranged so that the count becomes finer from the blade base direction to the blade tip direction, and the inclination angle of each rotary grindstone is changed. The method for grinding a blade according to claim 3, wherein the grinding is performed by grinding. 10. A buff member for the front and back of the blade can be freely moved toward and away from the front and back of the blade of the blade, and both the front and back surfaces of the blade are once circled by the respective rotary grindstones for the front and back of the blade. The method for grinding a blade according to any one of claims 3 to 9, wherein the blade surface and the both surfaces of the blade are profile-finished by a buff member after the multi-section cutting is performed in an arc shape. 11. A bed provided with a fixed base for fixing a cutting tool is provided with a traveling body which is reciprocally movable in a longitudinal direction thereof by a drive mechanism, and the traveling body is provided on each of the front and back sides of the blade. On the other hand, a rotating grindstone that can move forward and backward and change its angle is equipped on the front and back sides of the blade with the phase shifted in the longitudinal direction of the blade, and on one side of the running body or for the front and back sides of the blade. At a position adjacent to the grindstone, a buff member for the front and back of the blade is installed so that it can be brought into contact with and separated from the blade surface and the back surface of the blade, and the amount of advance and retreat of the rotary grindstone and the inclination angle,
A blade grinding apparatus, which is provided with a control mechanism for automatically controlling the amount to be ground, the contact angle with the blade and the number of chamfers. 12. The blade grinding device according to claim 11, wherein the rotary grindstones for the front and back of the blade are freely changeable at any angle around the tip of the blade of the blade. 13. A fluid cylinder is mounted on a movable portion, which is movable in a direction orthogonal to the longitudinal direction of a cutting tool, and a rotary grindstone via a sliding body which is movable in the same direction with respect to this movable portion. The blade grinding machine according to claim 11, wherein the piston rod is connected to the other side. 14. A moving part that is movable in a direction orthogonal to the longitudinal direction of the cutting tool, and a rotary grindstone is attached to the moving part via a sliding body that is movable in the same direction, and slides on the moving part. The blade grinding device according to claim 11, wherein a spring is connected between the moving bodies. 15. A fluid cylinder having a built-in gripping mechanism is provided as a moving portion which is movable in a direction orthogonal to the longitudinal direction of the blade, and is rotated by a sliding body which is movable in the same direction with respect to the moving portion. The tool for grinding a blade according to claim 11, wherein a grindstone is assembled. 16. A bed provided with a fixing base for fixing a cutting tool is provided with a traveling body which is reciprocally movable in a longitudinal direction thereof by a drive mechanism, and the traveling body is provided on each of the front and back sides of the blade. On the other hand, a rotary whetstone that can be moved forward and backward and its angle can be freely changed is installed in parallel on the front side and the back side of the blade by shifting the phase in the longitudinal direction of the blade and varying the count. A blade grinding apparatus, which is provided with a control mechanism for automatically controlling the angle according to the amount to be ground, the contact angle with the blade, and the number of chamfers. 17. The blade grinding device according to claim 16, wherein the plurality of rotary grindstones for the front surface of the blade and the plurality of rotary grindstones for the back of the blade are freely changeable at any angle around the tip of the blade of the blade. . 18. A fluid cylinder is attached to a movable part which is movable in a direction orthogonal to the longitudinal direction of a cutting tool and a rotary grindstone through a sliding body which is movable in the same direction with respect to this movable part. 17. The blade grinding device according to claim 16, wherein the piston rod is connected to the other side. 19. A rotary grindstone is attached to a movable portion which is movable in a direction orthogonal to the longitudinal direction of a blade and a sliding body which is movable in the same direction with respect to the movable portion, and slides on the movable portion. The tool for grinding a blade according to claim 16, wherein a spring is connected between the moving bodies. 20. A moving part, which is movable in a direction orthogonal to the longitudinal direction of the blade, is composed of a fluid cylinder having a built-in gripping mechanism, and is rotated by a sliding body movable in the same direction with respect to this moving part. The tool grinding device according to claim 16, wherein a grindstone is assembled. 21. The cutting tool according to claim 16, wherein the plurality of rotary grindstones for the front surface of the blade and the plurality of rotary grindstones for the back of the blade are each integrally changeable at an arbitrary angle. Grinding equipment. 22. The blade according to claim 16, wherein the plurality of rotary grindstones for the front surface of the blade and the plurality of rotary grindstones for the back of the blade are independently and independently changeable in arbitrary angle. Grinding equipment. 23. A buff member for the front and back of the blade on one side of the running body or at a position adjacent to the plurality of rotary grindstones for the front and back of the blade and the plurality of rotary grindstones for the back and front of the blade. The blade is installed so that it can be moved toward and away from the front and back surfaces of the blade.
23. The blade grinding device according to any one of 6 to 22.