JP2000280160A - Workpiece cutting device, and workpiece cutting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workpiece cutting device and a workpiece cutting method capable of improving cutting precision and productivity. SOLUTION: A slider 18 is slidably installed on rails 16a, 16b on a column 14 provided on a bed 12. On a front surface of the slider 18, a rotation shaft 30 having plural cutting blade blocks 28 is rotatably supported by support parts 26a, 26b. Each cutting blade block 28 includes plural cutting blades 40 and thick cutting blades 42 at both ends. Right under the cutting blade block 28 above the bed 12, a table 47 having a recessed part 46 having a V-shaped cross section is disposed, and plural workpieces 54 are disposed on the recessed part 46 through disposition plates 50a, 50b, and coating material 52a, 52b. The workpiece 54 is fixed by a fixing member 56. The cutting blades 40, 42 are rotated while lowering to cut the work 54. At this time, coolant 72 is discharged from supply ports 86a, 86b in a coolant supply part 80, and from a supply port 74 in a coolant supply passage 68.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work cutting device and a work cutting method, and more particularly to a work cutting device and a work cutting method used for cutting a magnetic member such as a magnet.

[0002]

2. Description of the Related Art A conventional work cutting apparatus 1 for obtaining a magnet used for a voice coil motor or the like includes an X slider 3 slidably mounted on a rail 2 as shown in FIG. On the X slider 3, a chuck table 4,
A sticking plate 5 is mounted thereon, and a plurality of works 6 are fixed to the sticking plate 5 by an adhesive. Then, the X slider 3 is slid in the direction of the arrow A (X-axis direction), and the work 6 is relatively moved at a constant speed toward the cutting blade 7 rotating in the direction of the arrow B, whereby the work 6 is moved to a predetermined position. It was cut to the thickness of. At this time, work 6
Is cut by the plurality of cutting blades 7, so that a plurality of magnets can be obtained by one operation.

[0003]

In the workpiece cutting device 1, it is ideal that the cutting blade 7 is mounted so as to be completely perpendicular to the rotating shaft 8, and in this case, the cutting reaction force is within the cutting blade surface. No force is generated to deform the cutting blade 7 perpendicular to its surface. However, in reality, as shown in FIG. 18, the cutting blade attachment error θ (θ = 0.02 to 0.0
(Approximately 4 degrees), and the component force f2 (= f1 × sin θ) corresponding to the mounting error of the tangential component force f1 of the cutting reaction force f changes to
The cutting blade 7 is deformed, and the cutting accuracy is deteriorated. Also, as shown in FIG.
Since the stroke of the cutting blade 7 required for cutting becomes long, there is a problem that the cutting time becomes long and workability is poor. Therefore, a main object of the present invention is to provide a work cutting device and a work cutting method that can improve cutting accuracy and productivity.

[0004]

According to a first aspect of the present invention, there is provided a workpiece cutting apparatus for cutting a workpiece by rotating a plurality of cutting blades. A work arrangement portion having a concave portion in which is arranged, for moving at least one of the work and the cutting blade so that the relative movement direction of the work with respect to the cutting blade at the time of cutting is perpendicular to the axial direction of the cutting blade. A drive unit and a coolant supply unit for supplying coolant to the work are provided. The work cutting device according to claim 2 is the work cutting device according to claim 1, wherein the recess has a V-shaped cross section, and the cross section is in a plane including the cutting blade and in a plane parallel to the plane. It is included in at least one of them.

According to a third aspect of the present invention, there is provided a workpiece cutting apparatus according to the first or second aspect, wherein the cutting blade has a Young's modulus of 441,315 N / mm ^{2 to} 686,49.
It includes a disk-shaped substrate of 0 N / mm ² and a cutting edge formed on the outer peripheral edge of the substrate. A work cutting device according to a fourth aspect of the present invention is the work cutting device according to any one of the first to third aspects, further comprising a fixing member for fixing the work to the recess, wherein the fixing member is a cutting blade of the work. And a comb-shaped portion pressed against the surface facing the surface.

According to a fifth aspect of the present invention, in the workpiece cutting apparatus according to any one of the first to fourth aspects, the thickness of the cutting blade at both ends of the plurality of cutting blades is greater than the thickness of the other cutting blades. It is set to be large. The work cutting device according to claim 6 is the work cutting device according to any one of claims 1 to 5, wherein a plurality of cutting blades are formed into blocks to form a cutting blade block, and the plurality of cutting blade blocks are They are arranged in parallel in the axial direction. The work cutting device according to claim 7 is the work cutting device according to claim 1, wherein the coolant supply unit has a first coolant supply port and a second coolant supply port for supplying coolant to the work, respectively. It includes a supply unit.

According to an eighth aspect of the present invention, in the workpiece cutting apparatus according to the seventh aspect, the first supply port is formed near the workpiece, and the second supply port is provided with a cutting blade larger than the first supply port. Is formed on the upstream side in the rotation direction. The work cutting device according to claim 9 is the work cutting device according to claim 7 or 8, wherein the plurality of works are arranged on the upstream side and the downstream side in the rotation direction of the cutting blade, and the coolant from the second supply port is provided. It is supplied to the work on the downstream side in the rotation direction of the cutting blade. According to a tenth aspect of the present invention, in the workpiece cutting apparatus according to any one of the seventh to ninth aspects, the coolant supply means includes a second coolant supply unit having a supply port for supplying the coolant formed in the recess. Part.

According to an eleventh aspect of the present invention, there is provided the workpiece cutting device according to any one of the seventh to tenth aspects, further comprising a surrounding member surrounding the recess.
According to a twelfth aspect of the present invention, there is provided a workpiece cutting device according to any one of the seventh to eleventh aspects, wherein the cutting blade includes a resin-based diamond cutting blade.
The work cutting device according to claim 13 is the work cutting device according to any one of claims 7 to 12, wherein the discharge pressure of the coolant is 196,140 Pa to 1,471,
050 Pa.

According to a fourteenth aspect of the present invention, there is provided a workpiece cutting method for cutting a workpiece by rotating a plurality of cutting blades, wherein a first step of arranging the plurality of workpieces in a concave portion of the workpiece placement portion; A second step of cutting the work by moving at least one of the work and the cutting blade so that the relative movement direction of the work with respect to the cutting blade is perpendicular to the axial direction of the cutting blade is provided. Claim 15
The work cutting method according to claim 14, wherein the concave portion has a V-shaped cross section, and the cross section is at least one of a plane including the cutting blade and a plane parallel to the plane. One of them is included.

The work cutting method according to claim 16 is the work cutting method according to claim 14 or 15,
The cutting blade has a Young's modulus of 441, 315 N / mm ² -68.
It includes a disk-shaped substrate of 6,490 N / mm ² and a cutting edge formed on the outer peripheral edge of the substrate. According to a seventeenth aspect of the present invention, in the workpiece cutting method according to any one of the fourteenth to sixteenth aspects, in the first step, the surface of the workpiece facing the cutting blade is pressed against the comb-like portion of the fixing member. And fixing the work to the recess.

According to an eighteenth aspect of the present invention, in the method of cutting a workpiece according to any one of the fourteenth to seventeenth aspects, the thickness of the cutting blade at both ends of the plurality of cutting blades is greater than the thickness of the other cutting blades. It is set to be large. The work cutting method according to claim 19 is the method according to claims 14 to 1.
8. In the work cutting method according to any one of the above 8, a plurality of cutting blade blocks in which a plurality of cutting blades are formed in a block are arranged in parallel in the axial direction, and the first step is that each cutting blade The method includes a step of arranging a work corresponding to the block. According to a twentieth aspect of the present invention, in the method for cutting a workpiece according to the fourteenth aspect, the second step includes a step of supplying coolant to the workpiece from a plurality of locations.

According to a twenty-first aspect of the present invention, in the method of the twentieth aspect, the second step includes a step of supplying coolant to the cutting blade and the workpiece from the same side. The work cutting method according to claim 22 is the work cutting method according to claim 20 or 21, wherein the first step includes arranging a plurality of works on the upstream side and the downstream side in the rotation direction of the cutting blade, The second step includes a step of supplying the coolant to the work downstream in the rotation direction of the cutting blade. The work cutting method according to claim 23 is the work cutting method according to any one of claims 20 to 22, wherein the second step includes a step of supplying coolant to the work from the concave portion.

The work cutting method according to claim 24 is the work cutting method according to any one of claims 20 to 23, wherein the second step includes a step of cutting the work while immersing the work in a coolant. The work cutting method according to claim 25 is the method according to claims 20 to 24.
In the work cutting method according to any one of the above, the cutting blade includes a resin-based diamond cutting blade. The work cutting method according to claim 26 is the method according to claims 20 to 25.
Wherein the discharge pressure of the coolant is from 196,140 Pa to 1,471,05.
It is 0 Pa.

In the work cutting apparatus according to the first aspect, a plurality of works are arranged in the concave portion of the work arrangement portion, and the plurality of cutting blades are lowered with respect to the work while rotating the plurality of cutting blades. The cutting blade can be cut. In this case, since the force for deforming the cutting blade can be made smaller than in the prior art, the deformation of the cutting blade is also reduced, and the accuracy of the cut surface is improved. Further, since the stroke of the cutting blade required for cutting can be shortened, the cutting time can be shortened, and the productivity is improved. Further, since a plurality of works are arranged in the concave portion of the work arrangement section, many works can be cut at once. The same applies to the workpiece cutting method according to claim 14.

If the concave portion has a V-shaped cross section as in the work cutting device according to the second aspect, the processing cost of the work arrangement portion can be reduced, and the present invention can be applied to various kinds of works. In particular, when arranging a planar work, the work can be stably arranged without fluttering. The same applies to the work cutting method according to claim 15. In the workpiece cutting device according to the third aspect, the substrate of the cutting blade has a Young's modulus of 441N / 315N.
By using, for example, a cemented carbide having a thickness of / N ^{2 to} 686/490 N / mm ² , a thin, hard cutting blade having good cutting properties can be obtained. Therefore, the cutting allowance can be reduced, the product yield can be improved, and the productivity can be improved. The same applies to the work cutting method according to claim 16.

In the work cutting device according to the fourth aspect, the comb is pressed into contact with the surface of the work facing the cutting blade, and the work is fixed. The work of peeling off the adhesive after the work and the cutting of the work becomes unnecessary, so that the work time can be shortened and the productivity is improved. The same applies to the workpiece cutting method according to claim 17. In the work cutting device according to the fifth aspect, by increasing the thickness of the cutting blades at both ends, it is possible to make the portions of dimensions that can occur at both ends of the work to be cut into powdery, so that defective products are mixed. Can be prevented, and the yield and productivity are improved. The same applies to the work cutting method according to claim 18.

In the work cutting apparatus according to the sixth aspect, a predetermined number of cutting blades are divided into blocks to form a cutting blade block, and a plurality of cutting blade blocks are arranged in parallel in the axial direction. At this time, the influence of the mounting error of the cutting blade does not affect the adjacent cutting blade blocks, and the mounting error does not accumulate. Therefore, a plurality of cutting blade blocks can be arranged in parallel. As a result, one cutting operation is performed. Can cut many workpieces. In addition, since the cutting blade block can be set for each work, the mounting accuracy of the cutting blade can be improved, and the mixing of products with wrong dimensions can be suppressed. Therefore, the yield is improved, and the productivity is improved. The same applies to the work cutting method according to the nineteenth aspect.

In the work cutting device according to the present invention, the coolant is supplied to the work from a plurality of different positions, so that the work arrangement portion having the concave portion is used to increase the contact area between the cutting blade and the work. Even in this case, the coolant can be reliably supplied. Therefore, the cutting blade is effectively worn, and the work can be cut with high productivity. The same applies to the work cutting method according to claim 20. In the work cutting device according to the eighth aspect, since the coolant can be supplied to the cutting blade and the work from a plurality of locations on the same side, sludge can be smoothly discharged. The same applies to the work cutting method according to the twenty-first aspect.

In the work cutting apparatus according to the ninth aspect, the coolant can be supplied also to the work on the downstream side in the rotation direction of the cutting blade. In addition, it blocks the entrained flow of air generated by the rotation of the cutting blade. Therefore, the influence of the entrained flow of air on the coolant is reduced, and the coolant can be more reliably applied to the work. The same applies to the work cutting method according to claim 22. Claim 1
In the work cutting device described in No. 0, coolant is supplied to the work from the concave portion of the work arrangement portion. Therefore,
For parts where it is difficult to supply coolant, such as the side of the workpiece,
Since the coolant can be supplied, the cutting accuracy of the work is further improved. This is particularly effective when the thickness of the work is large. The same applies to the work cutting method according to the twenty-third aspect.

[0020] In the work cutting device according to the eleventh aspect,
Since the coolant can be stored in the recess, the work can be cut while the work is immersed in the coolant. Therefore, the cutting accuracy of the work is further improved. The same applies to the work cutting method according to claim 24. In addition, when the cutting blade includes a resin-based diamond cutting blade, an insufficient amount of the coolant causes abnormal friction of the cutting blade and deteriorates cutting accuracy. Therefore, the work cutting device according to claim 12 is particularly effective. Becomes The same applies to the work cutting method according to claim 25. Claim 1
In the work cutting device described in No. 3, since the discharge pressure of the coolant is 196,140 Pa to 1,471,050 Pa, the cutting blade including the resin-based diamond cutting blade is worn moderately, and the work can be cut smoothly. The same applies to the work cutting method according to claim 26.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. Referring to FIG. 1, a work cutting device 10 according to an embodiment of the present invention is a kind of a thin blade cutting machine, includes a bed 12, and a column 14 having a substantially U-shaped cross section is erected on the bed 12. You. Two rails 16a and 16 parallel to the vertical direction are provided on the front surface of the column 14.
The slider 18 is mounted on the rails 16a and 16b so as to be slidable in the vertical direction (Z-axis direction).
A slider support 20 having a vertical screw hole is attached to the back surface of the slider 18.
A screw 22 functioning as a cutting shaft is screwed into the screw hole. The screw 22 is a lifting motor 2 disposed on the column 14.
Rotated by 4. Therefore, the screw 22 is rotated by the control of the elevating motor 24, and the slider 18 can be moved up and down via the slider support portion 20.
A cutting blade block 28 described later is fed in the direction of arrow C (downward).

Supports 26a and 26b are provided on the front surface of the slider 18 at predetermined intervals and at the same height, and the support shafts 26a and 26b rotate a rotating shaft 30 to which a plurality of cutting blade blocks 28 are attached. Supported as possible. A belt 34 is attached to one end of the rotating shaft 30 via a pulley 32, and the rotating shaft 30 and the cutting blade block 28 are rotated by rotating the belt 34 by a motor (not shown).
Is rotated, for example, in the direction of arrow D. The support 26
b is detachably mounted on the front surface of the slider 18 by sliding on rails 36a and 36b attached to the slider 18.

As shown in FIG. 2, a plurality of (five in this embodiment) segment flanges 38 are mounted on the outer peripheral surface of the rotating shaft 30, and the cutting blade block 28 is mounted in each segment flange 38. . The cutting blade block 28
As shown in FIGS. 2 and 3, a plurality of cutting blades 40 and thick cutting blades 42 at both ends thereof are included, and a spacer 44 is interposed between the cutting blades. That is, the cutting blades 40 and the spacers 44 are alternately arranged, and the cutting blades 42 are attached to both ends thereof. The dimensions of each cutting blade block 28 and the segment flange 38 are set in accordance with the dimensions of a workpiece 54 (described later) to be cut.

The cutting blades 40 and 42 include disk-shaped substrates 40a and 42a, respectively.
Blade edges 40b and 42b are mounted on the outer peripheral edge of 2a, respectively. The substrates 40a and 42a each have a Young's modulus of 441,315 N / mm ^{2 to} 686,490 N / m.
It is desirable to be formed of a cemented carbide of m ² , for example, tungsten carbide. In this case, when cutting the work 54 shown in FIG. When the Young's modulus is less than 441,315 N / mm ² , even if it is a cemented carbide, bending or undulation occurs due to resistance at the time of cutting, and as a result, the substrate 40a cannot be thinned and the advantage of the cemented carbide is lost. The Young's modulus is 686
If it exceeds 490 N / mm ² , there is no problem in terms of bending and undulation, but it becomes hard and brittle, and it is liable to be damaged during use, which is dangerous. Therefore, the Young's modulus is 441, 315 N
/ It is limited to mm ² ~686,490N / mm ² in the range. As the cutting edges 40b and 42b, for example, a resin-based diamond obtained by hardening diamond-based abrasive grains with a resin is used.

In this embodiment, for example, the substrate 40
The thickness of a is 0.6 mm, the thickness of the spacer 44 is 2.5 mm,
The thickness of the thick substrate 42a is set to 3 mm. By increasing the thickness of the cutting blades 42 at both ends in this manner,
The portion of the work 54 whose both ends are out of dimension can be powdered. The outer diameter (radius) of the cutting blades 40 and 42
Is desirably set to be longer than the outer diameter (radius) of the spacer 44 by (the thickness of the work 54 + the thickness of the comb portion 62).

Returning to FIG. 1, a work placement portion 45 is provided directly below the cutting blade block 28 on the bed 12.
The work placement section 45 includes a table 47 made of, for example, carbon having a concave portion 46 having a substantially V-shaped cross section.
7 are provided on the slopes 48a and 48b, respectively.
a and 50b are mounted. As shown in FIG. 4, on the upper surfaces of the arrangement plates 50a and 50b, coating materials 52a and 52 made of resin or the like having a high friction coefficient are further provided.
b is formed. Therefore, the coating materials 52a and 52b
Are arranged in a V-shape. When cutting, coat material 5
Workpieces 54 are arranged at positions corresponding to the respective cutting blade blocks 28 on 2a and 52b. In this embodiment, five coatings are applied on the coating materials 52a and 52b, respectively.
A total of ten works 54 are arranged for each piece. Work 5
As 4, a magnetic member such as a magnet having an arc-shaped cross section is used.

Further, as shown in FIG.
At positions corresponding to the respective cutting blade blocks 28 on the inclined surfaces 48a and 48b, clamp-shaped fixing members 56 for fixing the work 54 are provided. In this embodiment, ten fixing members 5 corresponding to each work 54 are provided.
6 are arranged. The fixing member 56 includes a slope 48a, 48b.
And a base 58 standing upright. The base 58 includes a lower portion 58
a and an upper portion 58c rotatably connected to the lower portion 58a via a support shaft 58b. The adjusting unit 60 is provided on the base 58.
Are connected, and the end of the comb portion 62 is positioned so as to form an L-shape, and the screw 66 is screwed from above the plate member 64 to attach the comb portion 62. Desirably, the comb-like portion 62 is formed of an elastic body such as a spring.

By using the adjusting portion 60 having a different height and a different inclination angle on the upper surface, the mounting angle of the comb portion 62 can be changed and the pressing force on the work 54 can be changed. In addition, by adjusting the degree of curvature of the comb-shaped portion 62 of the fixing member 56, it is possible to adjust the pressing force on the work 54, and thus the frictional force between the work 54 and the coating materials 52a and 52b. The comb-shaped portion 62 has a cutting blade 4
The cutting edge 40b is set so as to receive the zero cutting edge 40b.

When the work is fixed by the fixing member 56, the surface of the work 54 facing the cutting blades 40 and 42, that is, the upper surface is pressed toward the table 47 by the comb-like portion 62, whereby the work 54 can be fixed at the time of cutting. Fixing member 5
6 can be released by lowering the upper portion 58c of the base 58 outward. According to the fixing member 56, it is not difficult to adjust the pressing force applied to the work, so that even if the work is, for example, a thin member or a member that is easily chipped, the work does not break during the fixing operation.

As shown in FIGS. 5A and 5B, a coolant supply passage 68 serving as a coolant supply section is formed in the table 47. A coolant 72 is supplied into a coolant supply passage 68 from a hole 70 provided on a side surface of the table 47, and is supplied from a plurality of hole-shaped supply ports 74 provided at the bottom of the concave portion 46 of the table 47.
Is discharged upward. The discharge pressure of the coolant 72 is
196,140 Pa to 1,471,050 Pa,
More preferably, 294,210Pa-686,490
Pa. A plate-like surrounding member 76 is attached to the side surface of the table 47 so as to surround the recess 46, and the coolant 72 can be stored in the recess 46. Enclosure member 76
Is provided, the discharge pressure of the coolant 72 is 2
It may be 94, 210 Pa or less. The concave portion 46
At the bottom of the base plate, positioning pins 78 of the arrangement plates 88a and 88b are formed.

Further, as shown in FIGS. 1 and 6, a coolant supply section 80 is attached to the side surface of the slider 18 so as to face the cutting blade block 28. FIG.
As shown in (a) and (b), the coolant supply section 80 includes a coolant supply path 82 and a staying section 84.
On the front surface of the stagnation section 84, a slit-shaped supply port 8 is provided.
6a and 86b are formed at intervals in the vertical direction. That is, the supply port 86a is formed in the vicinity of the work 54, and the supply port 86b is formed closer to the cutting blade 40 than the supply port 86a.
42 is formed on the upstream side in the rotation direction. The slit width W of the supply port 86a and the supply port 86b is, for example, 1 mm to 2 m.
m. As can be seen from FIGS. 10A and 10B, a substantially L-shaped baffle plate 88 is provided in the retaining portion 84 in order to keep the pressure of the coolant 72 to be discharged constant. The coolant 72 is supplied to the retaining section 84 via the coolant supply path 82, and is discharged from the supply ports 86a and 86b.

Here, the discharge pressure of the coolant 72 is 1
It is 96,140 Pa-1,471,050 Pa. Within this range, the cutting blades 40 and 42 including the resin-based diamond cutting blade wear moderately, and the work 54 can be cut smoothly. The discharge pressure of the coolant 72 is more preferably 294, 210 Pa to 686, 490 Pa.
It is. Within this range, the cutting blade 4 by the discharge pressure
The workpiece 54 can be cut with high precision without deformation of 0 and 42. From the lower supply port 86a, the coolant 72 is supplied to a cutting section 90 where the workpiece 54 and the cutting blades 40 and 42 come into contact.
Is supplied. From the upper supply port 86b, the cutting blade 4
The coolant 72 is supplied toward the downstream side in the rotation direction of 0 and 42, that is, toward the left work 54 shown in FIGS. 10A and 10B.

The main operation of the work cutting device 10 will be described with reference to FIG. First, as shown in FIG. 7A, the upper portion 58c of the base 58 is tilted outward so that the work 54 can be arranged. Next, as shown in FIG. 7B, the workpieces 54 are arranged on the coating materials 52a and 52b, respectively, and as shown in FIG.
The upper portion 58c is returned to the original position, and the upper surface of the work 54 is pressed from above by the comb-shaped portion 62, thereby fixing the work 54. Then, when the start button (not shown) is turned on,
The cutting blades 40 and 42 descend toward the work 54 while rotating, and eventually rotate at the same speed to cut the work 54 as shown in FIG. 7D. At this time, a cutting reaction force acts on the work 54, but the work 54 is fixed by the fixing member 56, so that the work 54 can be securely held until the cutting is completed, and the flapping of the work 54 at the time of cutting can be suppressed. it can. Therefore, the cutting blade 40 or 42 where the work 54 falls down and rotates after the cutting is completed.
And the workpiece 54 after cutting is not damaged. When the cutting of the work 54 is completed and the cutting edges 40b, 42b of the cutting blades 40, 42 reach the arrangement plates 50a, 50b, the rotation of the cutting blades 40, 42 is automatically stopped, and then the cutting blades 40, 42 rise. Away from the work 54. In addition,
During the work of cutting the work 54, the coolant 72 is discharged from the supply ports 86 a and 86 b of the coolant supply section 80 and the supply port 74 of the coolant supply path 68.

According to such a work cutting device 10,
As shown in FIG. 8, the same cutting blade mounting error θ
However, since the cutting reaction force F is substantially in the direction of the center of the rotating shaft 30, the tangential component force F1 is small, and the component force F2 (= F1 × sin θ) for deforming the cutting blade 40 is inevitable. In addition, it becomes smaller than in the case of the prior art shown in FIG. As a result, the deformation of the cutting blade 40 can be reduced, and the cutting accuracy is improved. Further, unlike the related art, since the work 54 is arranged in a V-shape and cut from above rather than from the side, the work 54 does not shift due to the pressing force at the time of cutting. Therefore, the cut dimensional accuracy and cut surface of the work 54 are improved. Further, by arranging each of the plurality of works 54 in the recess 46 so as to intersect with the plane including the cutting blade 40, many works 54 can be cut at one time.

As the substrate 40a of the cutting blade 40, for example, tungsten carbide, which is a cemented carbide, is used. However, as described above, the deformation of the cutting blade 40 can be reduced and the blade is less likely to be run, so that the thickness of the substrate 40a can be further reduced. ,
The number of members 96 (described later) that can be taken out from one work 54 can be increased. Further, since the cutting blade block 28 can be set in association with each work 54 and the mounting accuracy of the cutting blades 40 and 42 is good, even if there is a dimensional variation of the work 54 or the like, mixing of products with wrong dimensions is prevented. Can be suppressed. Further, by setting the thickness of the cutting blades 42 at both ends of the cutting blade block 28 to be larger than the thickness of the cutting blade 40, both ends of the work 54, which can be a product having an out-of-dimension, can be powdered, so that defective products can be removed. Mixing can be prevented. Therefore, the yield is improved, and the productivity is improved.

Further, as shown in FIG. 9, the stroke of the cutting blade 40 from the start of cutting to the end of cutting by the work cutting device 10 is 29.54 mm, which is compared with the prior art (186.25 mm) shown in FIG. Can be shortened. That is,
As shown in FIG. 1, the recess 46 on the upper surface of the table 47 is
By forming it into a character shape and cutting it from above, the cutting stroke can be shortened, and the work cutting time can be greatly reduced. At this time, by arranging the work 54 so that the distance from the rotation shaft 30 is equal, the cutting stroke can be further shortened. Further, as shown in FIG. 9, the angles formed by the slopes 48a and 48b of the table 47, that is, the angles formed by the coating materials 52a and 52b (the V-shaped angles) are X1, X2, X3, X4
By setting the four points at the same time so that the cutting edge 40b of the cutting blade 40 passes, the cutting stroke of the work 54 can be further shortened, the cutting time can be shortened, and the productivity is improved.

Further, for example, if the outer diameters of the cutting blades 40 and 42 are set to dimensions obtained by adding (the thickness of the work 54 + the thickness of the comb portion 62) to the outer diameter of the spacer 44,
The radius of the cutting blades 40, 42 can be reduced. In this case, since the change in the load applied to the cutting blades 40 and 42 at the time of cutting the work becomes small, the rotation speed of the cutting blades 40 and 42 can be stabilized, and the movement of the cutting blades 40 and 42 can be suppressed. The cut surface at 54 becomes good.

As shown in FIG. 2, a fixed number of cutting blades 40 and 42 are divided into blocks to form a cutting blade block 28.
Is formed, and a plurality of cutting blade blocks 28 are mounted on the rotating shaft 30. Therefore, a mounting error in the thickness direction of each of the cutting blades 40, 42 and the spacer 44 does not affect the adjacent cutting blade blocks 28. Errors do not accumulate. Therefore, the cutting accuracy is not degraded, and the incorporation of a product with an incorrect dimension can be suppressed. As a result, the cutting blade 40 attached to the rotating shaft 30
Even if the number is increased, many good products can be obtained, so that productivity can be improved. In one experimental example, in the case of the conventional work cutting device 1, the number of cutting blades that can be attached was limited to 50, but in the case of the work cutting device 10, it was possible to attach up to 100.

After fixing the work 54 from above by the fixing member 56, the work 54 can be cut without fixing the work 54 with an adhesive, so that the work for bonding and peeling is not required, and the productivity is reduced. improves. In one experimental example, for example, when a work of 20 mm × 40 mm × 60 mm was cut by the conventional work cutting device 1, it took 55 minutes for bonding and peeling.
According to the method, these operations are not required, and the number of steps can be reduced accordingly. Regarding the cutting time, the work cutting device 1 required 18.5 minutes, but the work cutting device 10
According to this, it could be shortened to 10 minutes. Therefore, productivity can be improved.

By forming the concave portion 46 into a V-shaped cross section, the processing cost can be reduced and the present invention can be applied to various kinds of works. In particular, when placing a planar workpiece,
Can be placed stably without flutter. Further, the angle of the V-shape, which is the cross-sectional shape of the concave portion 46, can be set according to the shape of the work or the like. Coating material 5
2a and 52b. Further, the recess 46
May have an arc shape, and in particular, an arc shape having the same curvature as that of the cutting blade 40 is more preferable for shortening the cutting time.

Further, according to the work cutting device 10, the supply ports 86a and 86b having different formation locations are provided in the coolant supply section 80, and the coolant 72 is supplied to the work 54 from a plurality of locations, whereby the work shown in FIG. As shown in (2), even when the contact area between the cutting blades 40 and 42 and the work 54 is large, the coolant 72 can be reliably supplied. Therefore, the cutting blades 40 and 42 are effectively worn, and the work 54 can be cut with high accuracy and productivity. Further, since the coolant 72 can be supplied to the cutting blades 40 and 42 and the work 54 from a plurality of locations on the same side, sludge can be smoothly discharged.

Further, the coolant 7 from the supply port 86b
By the discharge of 2, the coolant 72 can also be supplied to the work 54 on the downstream side in the rotation direction of the cutting blades 40 and 42. At this time, the coolant 72 colliding with the spacer 44 is swung down from the spacer 44 so that
4 is supplied. Further, the coolant 72 from the supply port 86b blocks the entrained flow of air generated by the rotation of the cutting blades 40 and 42. Therefore, the influence of the entrained flow of air on the coolant 72 from the supply port 86a is reduced, and the coolant 72 from the supply port 86a can be more reliably applied to the work 54.

When the cutting blades 40, 42 include resin-based diamond cutting blades, if the supply of the coolant 72 is insufficient, abnormal friction of the cutting blades 40, 42 is caused, and the cutting accuracy is deteriorated. Is particularly effective. Further, when the work 54 is a sintered body such as a magnet member, if the cutting precision is poor, cracks and chips are generated, so that the present invention is particularly effective. Also, the coolant 7 is
By forming the second supply port 74, the coolant 72 can be supplied to a portion where the coolant 72 is not easily supplied by the coolant supply section 80, such as the side surface of the work 54, so that the cutting accuracy of the work 54 is further improved. This is particularly effective when the thickness of the work 54 is large.

Further, by surrounding the concave portion 46 with the surrounding member 76, the coolant 72 can be stored in the concave portion 46. Therefore, the work 54 can be cut while the work 54 is immersed in the coolant 72. Further, even if the discharge pressure from the supply port 74 is lower than the discharge pressure from the supply ports 86a and 86b, the coolant 72 can be supplied to the cutting blades 40 and 42. Therefore, the cutting accuracy of the work 54 is further improved. In particular, the coolant 72 can be sufficiently supplied to the work 54 on the downstream side in the rotation direction of the cutting blades 40 and 42, the sludge can be prevented from staying, and the work 54 can be cut with high accuracy.

Here, an experimental example of the work cutting device 10 will be described. Table 1 shows the experimental conditions.

[0046]

[Table 1]

In the case shown in FIGS. 10A and 10B,
"Dimension variation", "parallelism", and "wear rate" for the cases shown in FIGS. 11 (a) and 11 (b), respectively.
I asked. FIGS. 10A and 10B show coolant supply states at the start of cutting and during cutting (second half), respectively, when the work cutting device 10 having the coolant supply unit 80 and the coolant supply passage 68 is used. FIG.
(A) and (b) respectively show the coolant supply state at the start of cutting and during cutting (second half) when only one coolant supply unit 94 is used as the coolant supply unit 92 as the coolant supply unit. Another configuration of the device used in the case shown in FIGS. 11A and 11B is a work cutting device 10.
Is the same as

Here, “dimension variation” refers to FIG.
As shown in (a), the thickness of five points of the member 96 obtained by cutting the work 54 is measured, and the difference between the maximum value and the minimum value of the thickness is referred to. The “parallelism” is obtained as follows.
As shown in FIG. 12B, the thickness of the member 96 is measured in the directions indicated by the parallel arrows V1 and V2 and the direction indicated by the arrow H perpendicular thereto. And
The difference between the maximum value and the minimum value in each of the directions of the arrows V1, V2, and H is obtained, and the average value thereof is taken as "parallelism". In the experiment, “dimension variation” and “parallelism” were each measured for all members 96 obtained in one pass, and the measurement was performed every 10 passes. Then, “dimension variation” and “parallelism” obtained at the end of 100-pass cutting were respectively averaged, and values as shown in FIG. 13A were obtained.
The “wear rate” is a measure of the amount of radial wear of each of the cutting blades 40 and 42 at the end of 100-pass cutting,
The average value is taken.

In the experiment, the coolant 72 was successfully supplied to the workpiece cutting device 10. On the other hand, when only the coolant supply unit 94 was used as the coolant supply unit, the coolant 72 could be supplied to the cutting unit 90 at the start of the cutting shown in FIG. 11A, but during the cutting shown in FIG. In (2), the coolant 72 could not be supplied to the cutting section 90, and the supply of the coolant to the downstream work 54 was insufficient.
From the experimental results shown in FIGS. 13 (a) to 13 (c), FIG.
It can be seen that the workpiece cutting device 10 of (a) and (b) has smaller dimensional variations and higher cutting accuracy. Further, from the experimental results shown in FIGS. 14A and 14B, the wear rate of the workpiece cutting device 10 of FIGS. 10A and 10B is lower, and the life of the cutting blades 40 and 42 can be extended. It can be seen that the work 54 can be cut efficiently.

Incidentally, in the work cutting apparatus 10, when the coolant supply unit 80 alone is used as the coolant supply unit and when the coolant supply unit 80 and the coolant supply path 68 are used, the number of times of the cutting operation is reduced. If the number increases, the wear rate becomes higher when only the coolant supply unit 80 is used.

In the work cutting device 10, FIG.
A table 47a as shown in FIG. 5 may be used. A slit-type supply port 74a is formed at the bottom of the concave portion 46 of the table 47a. Other configurations are the same as those of the table 47. If the slit-type supply port 74a is used, the coolant 72 can be more uniformly discharged to each of the cutting blades 40 and 42. Further, a coolant supply unit 80a as shown in FIG. 16 may be used. Coolant supply unit 80
In a, nozzles 100a and 100b are attached to slit-shaped supply ports 98a and 98b, respectively. The nozzles 100a and 100b are configured to be rotatable so that the discharge direction of the coolant 72 can be adjusted. Therefore, if the coolant supply unit 80a is used, the coolant 72 can be supplied in a desired direction according to the shape and size of the table 47 and the shape, size, and arrangement of the work 54.

In the above embodiment, the case where the cutting blades 40 and 42 are moved toward the work 54 has been described. However, the present invention is not limited to this. For example, the work 54 is moved toward the cutting blades 40 and 42. Alternatively, the cutting blades 40 and 42 and the work 54 may be moved together. Further, the workpiece 54 and the cutting blade 4 are arranged such that the direction of movement of the workpiece 54 relative to the cutting blades 40 and 42 during cutting is perpendicular to the axial direction of the cutting blades 40 and 42.
Any means for moving at least one of 0 and 42 can be used.

[0053]

According to the present invention, since the force for deforming the cutting blade can be made smaller than before, the deformation of the cutting blade is reduced and the cutting accuracy is improved. Further, since the stroke of the cutting blade required for cutting can be shortened, the cutting time can be shortened, and the productivity is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state where a cutting blade block is attached to a rotating shaft.

FIG. 3 is an exploded perspective view showing a cutting blade block.

FIG. 4 is a perspective view showing a fixing member.

FIGS. 5A and 5B are a perspective view and an illustrative view showing an example of a coolant supply unit and an enclosing member provided on a table, respectively.

FIG. 6 is a perspective view showing an example of a coolant supply unit attached to the slider.

FIGS. 7A to 7D are illustrative views schematically showing an operation of the embodiment of FIG. 1;

FIG. 8 is an illustrative view showing a relationship of a processing reaction force applied to a cutting blade at the time of cutting according to the embodiment of FIG. 1;

FIG. 9 is an illustrative view showing a cutting stroke of the embodiment in FIG. 1;

FIG. 10 is an illustrative view showing a coolant supply state according to the embodiment shown in FIG. 1, wherein (a) shows the start of cutting and (b) shows cutting (second half);

FIG. 11 is an illustrative view showing a coolant supply state in a case where one coolant supply unit is used with a supply port, where (a) shows a start of cutting and (b) shows a state of cutting (second half).

FIGS. 12A and 12B are illustrative views for explaining dimensional variation and parallelism, respectively.

FIG. 13A is a table showing experimental results regarding cutting accuracy, and FIGS. 13B and 13C are graphs thereof.

FIG. 14 (a) is a table showing the results of experiments on the wear rate, and FIG. 14 (b) is a graph thereof.

FIG. 15 is a perspective view showing another example of the coolant supply unit provided on the table.

FIG. 16 is an illustrative view showing another example of the coolant supply unit attached to the slider;

FIG. 17 is a perspective view showing an example of a conventional technique.

18 is an illustrative view showing a relationship of a processing reaction force applied to a cutting blade at the time of cutting according to the conventional technique shown in FIG. 17;

FIG. 19 is an illustrative view showing a cutting stroke of the conventional technique shown in FIG. 17;

[Explanation of symbols]

Reference Signs List 10 Work cutting device 16a, 16b, 36a, 36b Rail 18 Slider 20 Slider support 22 Screw 24 Elevating motor 28 Cutting blade block 30 Rotating shaft 38 Segment flange 40, 42 Cutting blade 40a, 42a Substrate 40b, 42b Cutting edge 44 Spacer 45 Work Arrangement part 46 Recess 47, 47a Table 48a, 48b Slope 54 Work 56 Fixing member 62 Comb part 68, 82 Coolant supply path 72 Coolant 74, 74a, 86a, 86b, 92, 98a, 98b
Supply port 76 Enclosure member 80, 80a, 94 Coolant supply unit

Continued on the front page F term (reference) 3C027 AA05 AA10 PP02 3C040 AA03 AA05 BB07 GG03 HH11 3C058 AA03 AA09 AA16 AA18 AB04 AB06 AB08 AC04 BA05 CA01 CB01 CB03 CB10 3C069 AA01 BA04 BB01 BB02 BC02 CB02 CB02

Claims (26)

[Claims] 1. A work cutting device for cutting a work by rotating a plurality of cutting blades, comprising: a work arrangement portion having a recess in which a plurality of the works are arranged; and a relative position of the work to the cutting blade at the time of cutting. Driving means for moving at least one of the work and the cutting blade, and a coolant supply means for supplying a coolant to the work so that a mechanical movement direction is perpendicular to an axial direction of the cutting blade. Equipped with a workpiece cutting device. 2. The method according to claim 1, wherein the recess has a V-shaped cross section, and the cross section is included in at least one of a plane including the cutting blade and a plane parallel to the plane. Work cutting device. 3. The cutting blade has a Young's modulus of 441, 31.
5N / mm ² ~686,490N / mm includes a ^second disc-shaped substrate and a cutting edge formed on the outer peripheral edge of the substrate, workpiece cutting apparatus according to claim 1 or 2. 4. The apparatus according to claim 1, further comprising a fixing member for fixing the work in the concave portion, wherein the fixing member has a comb-shaped portion pressed against a surface of the work facing the cutting blade. 4. The workpiece cutting device according to any one of items 1 to 3. 5. The workpiece cutting device according to claim 1, wherein the thickness of the cutting blades at both ends of the plurality of cutting blades is set to be larger than the thicknesses of the other cutting blades. 6. The work according to claim 1, wherein the plurality of cutting blades are blocked to form a cutting blade block, and the plurality of cutting blade blocks are arranged in parallel in the axial direction. Cutting device. 7. The work cutting device according to claim 1, wherein the coolant supply means includes a first coolant supply unit having a first supply port and a second supply port for supplying a coolant to the work, respectively. 8. The apparatus according to claim 7, wherein the first supply port is formed near the work, and the second supply port is formed upstream of the first supply port in the rotation direction of the cutting blade. Work cutting equipment. 9. A plurality of the workpieces are arranged upstream and downstream in the rotation direction of the cutting blade, and coolant from the second supply port is supplied toward the downstream workpiece in the rotation direction of the cutting blade. The workpiece cutting device according to claim 7. 10. The coolant supply means further includes a second coolant supply portion having a supply port for supplying the coolant formed in the concave portion.
The work cutting device according to any one of the above. 11. The workpiece cutting device according to claim 7, further comprising a surrounding member surrounding said concave portion. 12. The workpiece cutting device according to claim 7, wherein the cutting blade includes a resin-based diamond cutting blade. 13. The discharge pressure of the coolant is 196,
The pressure is from 140 Pa to 1,471,050 Pa.
13. The workpiece cutting device according to any one of claims 12 to 12. 14. A work cutting method for cutting a work by rotating a plurality of cutting blades, wherein the first work is arranged in a concave portion of a work arrangement portion.
A second step of cutting the work by moving at least one of the work and the cutting blade so that a relative movement direction of the work with respect to the cutting blade is perpendicular to an axial direction of the cutting blade. A workpiece cutting method comprising a step. 15. The method according to claim 14, wherein the recess has a V-shaped cross section, and the cross section is included in at least one of a plane including the cutting blade and a plane parallel to the plane. Work cutting method. 16. The cutting blade has a Young's modulus of 441,3.
^2. A disk-shaped substrate having a thickness of 15 N / mm ^{2 to} 686 N / mm ² and a cutting edge formed on an outer peripheral edge of the substrate.
16. The method for cutting a workpiece according to 4 or 15. 17. The method according to claim 14, wherein the first step further includes fixing the work to the recess by pressing a surface of the work facing the cutting blade with a comb-like portion of a fixing member. A method for cutting a workpiece according to any one of the above items 16. 18. The workpiece cutting method according to claim 14, wherein the thickness of the cutting blades at both ends of the plurality of cutting blades is set to be larger than the thicknesses of the other cutting blades. 19. A plurality of cutting blade blocks in which the plurality of cutting blades are blocked are arranged in parallel in the axial direction thereof, and the first step corresponds to each of the cutting blade blocks in a concave portion of the work arrangement portion. The method according to claim 14, further comprising the step of arranging the work. 20. The method according to claim 14, wherein the second step includes a step of supplying a coolant to the work from a plurality of locations. 21. The work cutting method according to claim 20, wherein the second step includes supplying the coolant to the cutting blade and the work from the same side. 22. The first step includes arranging a plurality of the workpieces on the upstream and downstream sides in the rotation direction of the cutting blade, and the second step includes disposing the coolant downstream in the rotation direction of the cutting blade. 22. The method of cutting a work according to claim 20, further comprising a step of supplying the work toward a side work. 23. The method according to claim 20, wherein the second step includes a step of supplying the coolant to the work from the recess. 24. The work cutting method according to claim 20, wherein the second step includes a step of cutting the work while immersing the work in the coolant. 25. The work cutting method according to claim 20, wherein the cutting blade includes a resin-based diamond cutting blade. 26. The discharge pressure of the coolant is 196,
The pressure is from 140 Pa to 1,471,050 Pa.
26. The workpiece cutting method according to any one of 0 to 25.