JPH0155962B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a wood cutting device having a function of properly cutting even curved materials to obtain finished dimensions. Regarding equipment.

<Prior art> Regarding conventional wood cutting equipment,
As disclosed in Japanese Patent Application No. 50317, it is known that the cutting thickness is set by numerical input and the cutter position is automatically adjusted based on this.

<Problems to be solved by the invention> However, when both sides of the workpiece w are cut at once,
In a double-sided cutting device that attempts to achieve a predetermined finished size, the first cutter at the front cuts almost any amount, and the finished size is determined by the distance between the second cutter at the rear and the surface plate. For this reason, there is usually no need to consider the thickness of the workpiece w before cutting if the workpiece w has a uniform shape.

However, the workpiece w applied to the cutting device is not necessarily a long rectangular parallelepiped wood with a regular rectangular cross section, but may be curved as shown in FIG. 7. If such a material is cut as it is, the cut surface f shown in FIG.

On the other hand, since it can be assumed that the curvature of the upper and lower surfaces of a curved material is approximately equal, by cutting the upper and lower parts of the workpiece w equally as shown in the cut plane f in Figure 7 (b), a rectangular parallelepiped shape can be obtained. Cuttings can be produced. However, in order to uniformly cut the workpiece w and use its thickness as the finished dimension, it is necessary to detect the maximum thickness Mx of the workpiece w before cutting. cannot be measured manually by conventional means. Therefore, conventional machines cannot handle such curved materials, and when cutting curved materials, there is a high probability of producing defective products and the yield is extremely low. Although it is possible to adjust the first cutter several times through trial and error to cut the curved material, such adjustment is time-consuming, results in defective products, and is troublesome. It is.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cutting amount setting device that eliminates such conventional drawbacks and can easily cut even curved materials to the appropriate finished dimensions.

<Means for Solving the Problems> The present invention provides a first cutter, which is provided on the travel path of the workpiece w, and whose transverse movement is controlled by a moving motor, and which is disposed on the side facing the first cutter. It is equipped with a cutter pair consisting of a second cutter and a second cutter, a counter that counts the amount of movement of each cutter, and a platform for placing the workpiece w, and the detection end is brought into contact with the workpiece w to measure the distance from the reference position. A workpiece w constructed by installing a plurality of position measuring devices on the mounting platform in one direction of the workpiece w.
a numerical input switch for inputting the finished thickness dimension T of the workpiece w; a selection switch for specifying uniform cutting on both sides; and detection by the surface unevenness detection apparatus according to the specification of uniform cutting on both sides by the selection switch. From the maximum thickness Mx of the workpiece w to be processed and the finished thickness dimension T set from the numerical input switch, the cutting thickness on both sides is calculated as (Mx - T)/2, and the corresponding calculation is displayed on the counter. The apparatus is characterized by comprising a drive control means for setting a numerical value, driving the moving motors of the first cutter and the second cutter, and stopping the moving motors in response to a count value extinguishing signal from the counter.

<Operation> When the workpiece w is curved, the workpiece w is placed on the platform of the surface unevenness detection device, the detection end of the position measuring device is brought into contact with the workpiece w, and each reference position is set. Measure distance from.

At the same time, the finished thickness dimension T of the workpiece w is input using the numerical input switch, and uniform cutting on both sides is specified using the selection switch.

A predetermined amount of cutting is calculated in the drive control device based on the inputs of each switch and the count value, and the first cutter and the second cutter are moved to specified positions by the moving motor. Therefore, when the workpiece w is fed to the cutting device side, the first cutter and the second cutter
Both the upper and lower surfaces are cut to a thickness of (Mx-T)/2.

Therefore, even if the workpiece w is curved, cutting into a rectangular parallelepiped shape as shown in FIG. 7B can be performed.

The above-mentioned double-sided cutting can obtain a predetermined thickness and finished dimension not only from curved wood but also from ordinary rectangular parallelepiped wood. In addition, if the workpiece w is inclined and the amount of inclination is large, as shown in FIG. , it is necessary to cancel the designation of equal cutting on both sides by operating the selection switch and to designate the normal cutting amount numerically.

<Example> An example in which the present invention is applied to a four-sided wood cutting device will be described below.

In Figures 1 and 2, A is a surface unevenness detection device, in which a loading platform 1 on which a workpiece w is placed is supported by a support 3, and a support frame 4 erected from the right side has four position measuring devices 5 are supported at equal intervals in the front-rear direction.

The configuration of the position measuring device 5 will be explained with reference to FIG. 3. An air cylinder 6 is fixed to the support frame 4 in the vertical direction.
A mounting member 8 is fixed to the tip of the rod 7. A detection end 10 is fitted onto the lower part of the mounting member 8 via a spring 9, and the detection end 10 is connected to the mounting member 8 by a spring pin 11. The mounting member 8 includes a proximity switch 1.
2 is supported, and the detection end 10 has a shielding plate 13 at a position facing the detection part of the proximity switch 12.
is protruding. The mounting member 8 is also connected to a rod 16 of a detection tube 15 supported on the outside of the support frame 4.

In this configuration, the rod 7 is expanded by the drive of the air cylinder 6, and its detection end 10 comes into contact with the workpiece w, and the spring 9 is further expanded and contracted, causing the shielding plate 13 to approach the proximity switch 12 side. Then, the proximity switch 12 is turned on. So,
The height position of the workpiece w is detected by the moving distance of the rod 16 of the detection tube 15 from its retracted position to the stop position.

The driving of the air cylinders 6 of each of the position measuring devices 5 is uniformly controlled by an air source 17 fixed to the lower part of the platform 1.

A cutting device B is disposed at the front of the platform 1 so that a front surface plate 30 (described later) at its material feed port and the platform 1 of the surface unevenness detection device A are vertically aligned with each other. Ru.

The configuration of cutting device B will be explained.

Reference numeral 20 denotes a base that is long from front to back, and a holding frame 21 is disposed on the side surface of the base, and an elevating frame 23 is supported by the holding frame 21 so as to be movable up and down. The elevating frame 23 is driven by an elevating motor M ₂ (moving motor) provided on the holding frame 21. The elevating frame 23 can also be manually raised and lowered using a handle 24 linked to the elevating motor _M2 .

A material feeding device 25 is supported at the front position of the elevating frame 23. In the material feeding device 25, a driving roll 26a and a driven roll 26b which are belt-driven by a reversible material feeding motor are supported in the front and back in a material feeding frame, and an endless material feeding belt 27 is wrapped around the rolls. It has a known structure in which a large number of pressure rolls 28 are disposed inside a material conveying belt 27 and are urged downward by air cylinders, springs, or other bullets.

A movable front surface plate 30 is disposed at the front of the base 20, and a fixed rear surface plate 31 is disposed at the rear thereof. An inclined surface is formed on the lower surface of the front surface plate 30, and an intervening stand 32 having an upper surface with the same angle of inclination as the inclined surface is disposed at the lower part of the front surface plate 30. By horizontally screwing together the drive shaft of a lifting motor M ₁ (moving motor) supported at the front of the mounting table 32, the lifting motor M ₁ moves the mounting table 32 back and forth. Along with this, the upper surface of the front surface plate 30 moves up and down due to the action of the inclined surface. A manual handle 34 is linked to the lifting motor _M1 , and the front surface plate 30 can be adjusted up and down by rotating the manual handle 34.

An arcuate hole is formed between the front surface plate 30 and the rear surface plate 31 at the lower position of the material feeding device 25, and a disc-shaped lower cutter 35 is housed in the arcuate hole. Due to the difference in level between the lower cutter 35 and the front surface plate 30,
The cutting thickness of the lower surface of the workpiece w is defined. Further, the lower surface cutter 35 is fixed to the rear surface plate 31 side so as to be always flush with the rear surface plate 31.

Behind the lower cutter 35, a disk-shaped upper cutter 36 is held on the elevating frame 23. The upper surface cutter 36 is adjusted up and down by a lifting motor _M2 that moves the lifting frame 23, and the workpiece w is adjusted by the distance between the rear surface plate 31 and the upper surface cutter 36.
The finished thickness of is determined.

In addition, a right front cutter 37 and a right back cutter 38, which are circular cutters rotated by a drive motor, are disposed at the front and rear right side positions of the top cutter 36. A left cutter 39 consisting of a circular cutter is disposed on the left side edge. Said left cutter 3
9, the movement in the width direction can be adjusted by the feed motor _M3 .

Further, on the right edges of the front surface plate 30 and the rear surface plate 31, rulers 40a, 40b, and 40c are provided to guide the movement of the side surface of the workpiece w along the longitudinal direction.

By adjusting the rulers 40a and 40c, the finished thickness of the workpiece w can be determined. That is, the amount of rough cutting of the right side surface of the workpiece w is defined by the step between the right front cutter 37 and the ruler 40a.
Further, the level difference between the right back cutter 38 and the ruler 40b similarly defines the finishing cutting amount of the right side surface of the workpiece w, and the distance between the left cutter 39 and the ruler 40c determines the finished width dimension of the workpiece w.

In addition, on the left side edge of the base 20, rulers 40a, 4 are pressed against the left side surface of the workpiece w and the workpiece w is
Pressing roll devices 41 that press against the 0b and 40c sides are arranged at appropriate intervals. Further, on the elevating frame 23, there is a press roll device 4 that presses against the upper surface of the workpiece w and presses the workpiece w against the rear surface plate 31 side.
A large number of cutters 2 are arranged in rows at front and rear positions of the upper face cutter 36.

As shown in FIG. 5, a slit plate s is fixed to the drive shaft of each of the motors M ₁ , M ₂ , M ₃ , and detectors K ₁ , K ₂ , K ₃ are arranged on the outer periphery of the slit plate s. .
The detectors K ₁ , K ₂ , K ₃ are counters C ₁ , K 3 , respectively.
It is connected to counters C ₂ and C ₃ and has the function of sending a signal to counters C ₁ , C ₂ and C ₃ each time the slit plate f passes through the slit. Therefore, the counters C ₁ , C ₂ ,
_C3 makes it possible to detect the amount of movement of each cutter.

43 is a control box for controlling the operation of the apparatus of this embodiment. The control box 43 includes a central control unit CPU, and as shown in FIG. 5, information from the counters C ₁ , C ₂ , C ₃ and
The drive of the cutting device B is controlled by various key switch inputs from the operation panel 44 of the control box 43, which will be described below.

As shown in FIG. 5, the operation panel 44 of the control box 43 includes numerical input keys 46 from 0 to 9, a channel selection key 47 with CH displayed, a start key 48, Stop key 49
A key switch panel 45 is provided.

Further, the operation panel 44 includes a thickness changeover switch 50 with a double-sided uniform cutting position x and a bottom surface machining allowance setting position y, and a display 51 that warns about errors in input values using the numerical input keys 46.
and is provided.

Furthermore, the operation panel 44 has three types of processed materials w.
Current value display parts 52a, 52b, 52c that numerically indicate the cutting status of
and target value display sections 53a, 53b, and 53c are provided.

The current value display section 52a and the target value display section 53a are
Indicates the lower surface cutting amount dimension 〓CH ₁ 〓 determined by the step between the front surface plate 30 and the lower surface cutter 35,
It is possible to display values from 9.9 mm to 0.0 mm, respectively, and 〓±〓 is displayed on the current value display section 52a. Here, the front surface plate 30 is connected to the bottom cutter 3.
If the position is lower than 5, 〓+〓 is displayed, and in the opposite case, 〓-〓 is displayed.

Also, the current value display section 52b and the target value display section 53b
indicates the thickness dimension 〓CH ₂ 〓 determined by the distance between the rear surface plate 31 and the upper surface cutter 36, and each is indicated by four characters, so 〓999.9mm〓~
It is possible to display up to 〓000.0〓.

Furthermore, the current value display section 52c and the target value display section 53c indicate the width dimension 〓CH ₃ 〓 determined by the distance between the ruler 40c and the left cutter 39, and each of them is displayed with four characters as before. .

Next, the working procedure of the apparatus of this embodiment will be explained.

First, the workpiece w is placed on the mounting table 1 of the surface unevenness detection device A, and the air cylinders 6 of each position measuring device 5 are driven to bring the detection end 10 into contact with the upper surface of the workpiece w. Due to this contact, the shielding plate 13 of the detection end 10 approaches the proximity switch 12 side, and the proximity switch 12 is turned on. Therefore, the amount of extension of the rod 16 of the detection tube 15 is counted by a mechanism (not shown), and when the proximity switch 12 is turned on, the count is increased and the amount of extension is determined. By detecting the amount of extension of the rod 16, the height of the point of the workpiece w that the detection end 10 abuts is specified.

In this way, the height of the workpiece w is detected by the position measuring device 5 at four points at equal intervals.

At the same time, the condition of the workpiece w is grasped, and if the workpiece w is inclined, the changeover switch 50 is set to the double-sided uniform cutting position x.

Furthermore, press the channel selection key 47 to input 〓CH〓, use the numerical input key 46 to input 〓2〓 to set the channel for finishing thickness dimension specification, and then use the numerical input key 46 to input the finishing thickness dimension T.
Enter.

From this finished thickness dimension T and the maximum thickness Mx of the workpiece w detected by the surface unevenness detection device A,
The cutting value is calculated by the central control unit CPU, and the cutting thickness for both the upper and lower surfaces is (Mx-T)/2.
is specified.

In order to achieve such a cutting thickness, the sixth
As shown in Figure A, the lower cutter 35 is connected to the front surface plate 30.
The count value of the counter _C1 of the motor _M1 is set so that the motor M1 stops moving when the height (cutting amount dimension) is equal to (Mx-T)/2. In addition, the top cutter 36 is driven by a motor so that it stops at a height position equal to the finished thickness dimension T from the rear surface plate 31.
The count value of counter C ₂ of M ₂ is set.

When the calculations for the cutters 35 and 36 are performed, the target value display section 53a automatically displays the lower surface cutting amount dimension (Mx-T)/2, and the target value display section 53b automatically displays the finished thickness dimension T. be done.

By the way, there is a limit to the amount of cutting that each of the cutters 35 and 36 can cut. If this limit value is 5 mm and the cutting amount dimension (Mx-T)/2 is set to 5 mm or more, it becomes impossible to cut the required lower surface of the inclined timber. Further, if the minimum thickness Mn detected by the position measuring device 5 is smaller than the finished thickness dimension T, it is not possible to finish the film to a predetermined thickness. Further, if the cutting amount dimension (Mx-T)/2 is smaller than the maximum thickness (Mx-Mn) of surface unevenness of the workpiece w, a rectangular parallelepiped shape cannot be obtained after cutting. Therefore, in such a case, the display 53 displays an error message to that effect.

After this, the motors M ₁ and M ₂ are operated, causing the front surface plate 30 and the elevating frame 23 to rise and fall. This amount of movement is calculated by the detector K ₁ ,
K ₂ is input to the counters C ₁ and C ₂ , and as the count value is input to the counters C ₁ and C ₂ , the motors M ₁ ,
_M2 drive stops. As a result, the cutters 35 and 36 described above are positioned. In addition, in this case, the numerical values on the current value display sections 52a and 52b are as follows.
This will match the numerical values on the target value display sections 53a and 53b.

In addition, if you want to perform width finishing at the same time with this device, press the channel selection key 47 and input 〓CH〓, and use the numerical input key 46 to input 〓3〓 to set the channel for finishing width dimension specification. Then, the finishing width dimension is further input using the numerical input key 46.

When the start key 48 is turned on, the motor _M3 is driven and the left cutter 39 is moved to a predetermined position.

After such positioning, when the workpiece w is supplied to the front surface plate 30 and sent forward by the material feeding device 25, the workpiece w is subjected to the required cutting.

However, although it is possible to perform uniform cutting on both sides of materials other than curved materials, when using inclined materials, as shown in Figure 6 (b), the slope of the sloped upper surface is large, and therefore, Cutting amount dimension (Mx-T)/
2 may be smaller than the maximum thickness of surface unevenness (Mx - Mn). In this case, change the thickness changeover switch 50 to the bottom surface cutting amount setting position y, press the channel selection key 47 to input 〓CH〓, use the numerical input key 46 to input 〓1〓, and then set the bottom surface cutting amount. By setting the channel to the specified value, inputting and specifying the lower surface cutting amount dimension using the numerical input key 46, and decreasing the cutting amount, the upper surface cutting amount is increased and the inclined surface is removed.

<Effects of the Invention> As described above, according to the present invention, when the workpiece w is curved, it is possible to easily cut the top and bottom of the workpiece w evenly to obtain the required finished thickness dimension.
It has excellent effects such as improved yield and efficient cutting process.

[Brief explanation of drawings]

The attached drawings show an embodiment of the present invention, in which FIG. 1 is a side view, FIG. 2 is a side view of the surface unevenness detection device A,
3 is a longitudinal sectional side view of the main parts of the position measuring device 5, FIG. 4 is a perspective view of the cutting device B, FIG. 5 is a wiring block diagram, and FIGS. 6 A and 6 are schematic side views showing the cutting process. FIGS. 7A and 7B are side views showing the cutting form of the workpiece w. 1; Mounting platform, 5; Position measuring device, 6; Air cylinder, 10; Detection end, 12; Proximity switch,
13; Shielding plate, 15; Detection tube, 16; Rod, 2
0; Base, 23; Elevating frame, 30; Front surface plate, 3
1; Rear surface plate, 35; Bottom cutter, 36; Top cutter, 43; Control box, 46; Numerical input key, 47; Numerical setting key switch, 50; Thickness switching switch, A; Surface unevenness detection device, B; Cutting device , M ₁ , M ₂ , M ₃ ; Motor, C ₁ , C ₂ , C ₃ ;
counter.

Claims (1)

[Scope of Claims] 1. A cutter that is provided on a traveling path of a workpiece and whose transverse movement is controlled by a moving motor, and that includes a first cutter and a second cutter that is disposed on the side opposite to the first cutter. A position measuring device is equipped with a pair of cutters, a counter for counting the amount of movement of each cutter, and a stage for placing the workpiece, and a position measuring device that measures the distance from the reference position by abutting the detection end on the workpiece. A surface unevenness detection device for the workpiece is configured by installing multiple rows of workpieces on the platform across the direction, a numerical input switch for inputting the finished thickness dimension T of the workpiece, and a designation for uniform cutting on both sides. The selection switch specifies equal cutting on both sides by the selection switch, and the machining on both sides is performed based on the maximum thickness Mx of the workpiece detected by the surface unevenness detection device and the finished thickness dimension T set by the numerical input switch. Specify the thickness as (Mx-T)/2 for both,
It is characterized by comprising a drive control means that sets the counted value on a counter, drives the moving motors of the first cutter and the second cutter, and stops the moving motors in response to a counted value extinguishing signal of the counter. Cutting amount setting device for wood cutting equipment.