JP3073195B1 - Work cutting device and work cutting method - Google Patents

Abstract

A work cutting apparatus and a work cutting method capable of improving cutting accuracy and productivity are provided. SOLUTION: A slider 18 is slidably mounted on rails 16a, 16b of a column 14 erected on a bed 12. Support portion 26a provided on the front surface of slider 18
And 26b support both sides of the rotating shaft 30 on which the cutting blade block 28 is mounted. The cutting blade block 28 includes a plurality of cutting blades 48. The work 70 is arranged directly below the cutting blade block 28 on the bed 12. The work 70 is cut by rotating the cutting blade 48 and lowering it. At this time, the cutting speed of the cutting blade 48 is adjusted according to the load applied to the cutting blade 48.

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 sintered body such as a magnet.

[0002]

2. Description of the Related Art FIG. 13 shows an example of a conventional work cutting apparatus for obtaining a magnet used for a voice coil motor or the like. This work cutting device 1 is a kind of so-called cantilever type overhang type.
Each of the cutting blades 3 is formed by assembling one by one while holding a spacer (not shown), and an end of the rotating shaft 2 is supported by a support arm 4. Further, the work cutting device 1 includes an X slider 6 slidably mounted on the rail 5. A chuck table 7 is mounted on the X slider 6, and a sticking plate 8 is mounted thereon. A plurality of works 9 are fixed to the sticking plate 8 by an adhesive. And X
The slider 9 is slid in the direction of the arrow A (X-axis direction), and the work 9 is relatively moved at a constant speed toward the cutting blade 3 rotating in the direction of the arrow B, so that the work 9 has a predetermined thickness. Disconnect. At this time, since the work 9 is cut by the plurality of cutting blades 3, a plurality of magnets can be obtained by one operation.

[0003]

However, since the above-mentioned prior art is a so-called cantilever type, if the cutting load increases and the cutting blade 3 becomes lower than a predetermined number of revolutions, the cutting blade 3 is shaken during cutting. And the accuracy of the cut surface of the work 9 is reduced. Therefore, the cutting speed of the work 9 is set to a constant speed in accordance with the location where the maximum load occurs. For this reason, the cutting speed cannot be switched in accordance with the cutting sectional area of the work 9, and the cutting efficiency is poor. This adverse effect was particularly remarkable when cutting an arc-shaped sintered body. Further, as a recently used carbide cutting blade, its thickness is 0.5 mm to 0.6 mm in order to reduce the cutting margin.
mm is used, but the cutting speed cannot be increased so much because blur is likely to occur, and it is urgently required to improve the cutting efficiency.

Further, since the cutting blade 3 is cantilevered, the cutting accuracy is reduced due to blurring occurring during cutting, and the number of cutting blades 3 attached to the rotating shaft 2 is limited. However, there is a problem that productivity is poor.

Therefore, as a conventional example for improving cutting accuracy and productivity, there is a technique disclosed in Japanese Patent Application Laid-Open No. Hei 7-214544. However, the cutting depth and the contact length of the cutting blade are previously determined for each object to be cut. Must be input as data. That is, data must be input to each of the workpieces having different shapes, and the workability is not good. Further, if the fixed portion of the object to be cut is displaced, a deviation occurs between the contact length of the cutting blade converted from the cutting depth and the actual contact length of the cutting blade, so that cutting accuracy is reduced.

Further, a technique for preventing grinding burn by detecting a load and controlling a grinding speed is disclosed in Japanese Patent Publication No. 6-3 / 1994.
Although disclosed in Japanese Patent No. 7031, since the grinding burn is prevented by reducing the grinding feed speed,
It is considered that the grinding time becomes longer. As described above, the cutting accuracy and the productivity were not sufficient in any of the conventional techniques.

[0007] Therefore, a main object of the present invention is to provide a work cutting apparatus and a work cutting method capable of improving cutting accuracy and productivity.

[0008]

According to a first aspect of the present invention, there is provided a work cutting apparatus for cutting a fixed work by rotating a cutting blade while moving the cutting blade in a vertical direction. The apparatus is characterized by comprising a support portion for supporting both sides of a rotating shaft on which a cutting blade is mounted, and one unit to which the support portion is attached and which is movable in a vertical direction.

A work cutting device according to a second aspect of the present invention is a work cutting device for cutting a work by rotating a cutting blade, the work cutting device having two support portions for supporting both sides of a rotary shaft on which the cutting blade is mounted. The one support portion is attached to the other support portion so as to be movable in the axial direction of the rotation shaft.

According to a third aspect of the present invention, in the workpiece cutting apparatus according to the first or second aspect, the direction of relative movement of the workpiece with respect to the cutting blade at the time of cutting is in the direction of the center of the cutting blade. And means for moving the work or the cutting blade.

According to a fourth aspect of the present invention, there is provided a workpiece cutting apparatus according to any one of the first to third aspects, further comprising: load detecting means for detecting a load applied to the cutting blade; and cutting in accordance with the load. It includes cutting speed adjusting means for adjusting the cutting speed of the blade.

A work cutting apparatus according to a fifth aspect of the present invention is a work cutting apparatus for cutting a work by rotating a cutting blade, wherein a means for detecting an average load X1 applied to the cutting blade at a time T1 after the start of cutting the work. Means for detecting the load average X2 applied to the cutting blade at each time T2 following the time T1, and the cutting speed of the cutting blade at each of the second and subsequent times T2 of the time T2 is calculated by comparing the load average X1 and the previous time T
And means for adjusting based on the second load average X2.

A work cutting device according to a sixth aspect of the present invention is a work cutting device for cutting a work by rotating a cutting blade, a means for detecting a load average X2 applied to the cutting blade at each time T2, and each time T2. Of the cutting blade at a certain time T2, the load average X2 at the time T2 two times before
And means for adjusting based on the load average X2 at the previous time T2.

According to a seventh aspect of the present invention, in the method for cutting a workpiece by rotating the cutting blade, the step of fixing the workpiece, and both sides of the rotary shaft on which the cutting blade is mounted are supported by the supporting portions. Support and support 1
The method further comprises a step of cutting the work by rotating the cutting blade while moving the cutting blade in the vertical direction in accordance with the movement of the unit in the vertical direction in a state where the unit is mounted on the unit.

In the work cutting method according to the present invention, in the work cutting method for cutting a work by rotating a cutting blade, a step of detecting an average load X1 applied to the cutting blade at a time T1 after the start of cutting the work. Detecting the load average X2 applied to the cutting blade at each time T2 following the time T1, and cutting the cutting speed of the cutting blade at the second and subsequent times T2 of each time T2 between the load average X1 and the previous time T2. It is characterized by comprising a step of adjusting based on the load average X2.

According to a ninth aspect of the present invention, in the method for cutting a workpiece by rotating the cutting blade, a step of detecting a load average X2 applied to the cutting blade for each time T2, and each time T2. And adjusting the cutting speed of the cutting blade at a certain time T2 based on the load average X2 at the time T2 two times before and the load average X2 at the previous time T2.

[0017]

[0018]

[0019]

In the work cutting device according to the first aspect, by supporting both sides of the rotating shaft together, the holding of the cutting blade can be stabilized, and the deflection of the cutting blade during cutting can be reduced. Chipping can be suppressed when cutting a brittle work such as a sintered body, and cutting accuracy can be improved. In addition, since the blur of the cutting blade can be reduced, the number of cutting blades that can be attached to the rotating shaft can be increased. As a result, the number of cuts in one operation can be increased, so that productivity can be improved. Further, by attaching the supporting portions that support both sides of the rotating shaft to one unit, it is possible to improve the holding accuracy of the cutting blade, particularly the accuracy in the horizontal direction. The same applies to the work cutting method according to the seventh aspect.

[0021]

[0022] As in the workpiece cutting device according to the second aspect, one of the supporting portions supporting both sides of the rotating shaft may be attached to the other supporting portion so as to be movable in the axial direction of the rotating shaft. .

[0023]

Further, in the work cutting device according to the third aspect, for example, the cutting blade is cut down while rotating the cutting blade with respect to the work arranged at a predetermined position, and the cutting blade is cut into the work. Since the force for deforming the blade can be made smaller than in the prior art, the load on the cutting blade is reduced. Therefore, the deformation of the cutting blade is reduced, and the accuracy of the cut surface is improved. Further, since the stroke required for cutting can be shortened, the cutting time can be shortened, and the productivity is improved.

Further, in the work cutting apparatus according to the fourth aspect, the load is automatically detected, and the work is cut while adjusting the cutting speed so that the load applied to the cutting blade is stabilized regardless of the shape of the work. Therefore, the cutting efficiency can be improved, and the cutting accuracy can be improved. In particular, when the movement of the cutting blade can be suppressed, the load detection becomes more accurate, and the cutting accuracy can be further improved.

In the work cutting device according to the fifth and sixth aspects, the load can be stabilized by controlling the cutting speed in real time according to the load applied to the cutting blade, so that the load on the cutting blade is reduced. And the cutting accuracy can be improved. Further, the time required for cutting can be reduced, and the productivity can be improved. The same applies to the workpiece cutting method according to the eighth and ninth aspects.

[0027]

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 double-ended double-blade type thin blade cutting machine. A character-shaped column 14 is erected. Two rails 16a and 1 parallel to the vertical direction are provided on the front surface of the column 14.
6b is formed, and a slider 18 slidable in the vertical direction (Z-axis direction) is mounted on the rails 16a and 16b. A slider support 20 having a vertical screw hole is attached to the back surface of the slider 18, and a screw 22 functioning as a cutting shaft is screwed into the screw hole of the slider support 20. The screw 22 is rotated by a lifting motor 24 disposed on the column 14. Therefore, the lifting motor 2
4 rotates the screw 22 to move the slider support 2
The slider 18 can be moved up and down through the arrow 0, and at the time of cutting, 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 cutting blade block 28 is provided by the supports 26a and 26b.
Are supported on both sides of the rotating shaft 30 to which the.

As shown in FIG. 2, the rotating shaft 30 includes an arbor 32, rotation supporting portions 34a and 34b, and screws 36a and 36.
b. Each end of the arbor 32 has a tapered portion 3
8a and 38b are formed, and the screw holes 4
0a and 40b are formed. Rotation support parts 34a, 34b
Each has a receiving portion 42a, 42b for receiving the end of the arbor 32 and screw holes 44a, 44b for inserting the screws 36a, 36b. Receiving part 42
The tapered portions 38a, 38a, 42b
8b.

Therefore, in the rotating shaft 30, the receiving portion 42
The tapered portions 38a, 38b are fitted into the a, 42b, respectively, so that the rotation supporting portions 34a, 34b and the arbor 32 are integrated. 36b is the screw hole 44
The arbor 32 is accurately fixed by being inserted into the screw hole 40b and screwed into the screw hole 40b.

The rotating shaft 30 is supported by the supporting portions 26a and 26b. At this time, the support 26
A bearing (not shown) is interposed between the rotation supporting portion 34a and the rotation supporting portion 34a, and between the supporting portion 26b and the rotation supporting portion 34b, so that the rotating shaft 30 is rotatably supported.

Note that, as shown in FIG.
Is detachably mounted on the front surface of the slider 18 by sliding on rails 46a and 46b attached to the slider 18. As a result, the rotation shaft 30 is attached and detached. Further, the cutting blade block 28 has a plurality of cutting blades 48,
A spacer (not shown) is interposed between the cutting blades 48.
In this embodiment, for example, the thickness of the cutting blade 48 is set to 0.6 mm, and the thickness of the spacer is set to 2.5 mm.

Referring also to FIG. 3, a pulley 50 attached to one end of the rotary shaft 30 and a rotary shaft motor 72 (described later)
A belt 54 is attached to a motor pulley 52 attached to a rotating shaft 51 rotated by the rotating shaft 51, and the rotating shaft 30 and the cutting blade block 28 are moved, for example, by an arrow D by belt transmission for rotating the belt 54 by driving a rotating shaft motor 72.
Rotated in the direction. It should be noted here that a tension adjusting means 56 for adjusting the tension of the belt 54 is provided. The tension adjusting means 56 includes a rotating shaft 60 having a pulley 58 formed at the tip, a supporting portion 62 that supports the rotating shaft 60, and an air cylinder 64. The pulley 58 at the tip of the rotating shaft 60 follows the belt 54. The air cylinder 64 is configured such that the rotation shaft 60 that rotates in the direction of arrow E about the rotation fulcrum P presses the belt 54 with a constant force.
Therefore, the tension of the belt 54 can be kept constant.

Returning to FIG. 1, a table 66 made of, for example, stainless steel is arranged immediately below the cutting blade block 28 on the bed 12, and a sticking plate 68 made of, for example, carbon is arranged on the upper surface of the table 66. The work 70 is fixed on the plate 68 by, for example, an adhesive. In this embodiment, a total of four works 70 are arranged in parallel. As the work 70, for example, a sintered body such as a magnet having an arc-shaped surface is used.

Next, the electrical configuration of the workpiece cutting device 10 will be described with reference to FIG.

The work cutting device 10 includes a rotary shaft motor 72 for rotating the cutting blade 48, in addition to the elevating motor 24 for moving the cutting blade 48 up and down. Lifting motor 24
The rotating shaft motor 72 is controlled by a lifting motor control circuit 76 and a rotating shaft control circuit 78 to which power is supplied from an input power supply 74, respectively. The rotating shaft motor control circuit 78 includes a load current detector 80 for detecting a load current of the rotating shaft motor 72.

The elevation motor control circuit 76 and the rotating shaft motor control circuit 78 are controlled by a control unit 82. The control unit 82 includes an I / O port 84 for inputting and outputting a signal to and from the elevating motor control circuit 76 and the rotating shaft motor control circuit 78. The I / O port 84 performs processing operations via a BUS 86. ROM for controlling CPU, ROM storing control programs and the like
90, a RAM 92 serving as a work area, and a CRT 94 for monitoring an operation state are connected. In addition, BUS8
An operation panel 96 for inputting control data and the like is connected to 6. Therefore, the vertical movement and rotation of the cutting blade 48 are controlled by the control unit 82 based on the load data and the data set by the operator.

The main operation of the work cutting apparatus 10 will be described with reference to FIGS.

The operator previously sets the work 70 fixed to the attachment plate 68 with, for example, an adhesive on the table 66.

When the start button on the operation panel 96 is turned on, the cutting blade 48 rotates and the cutting blade 4 rotates.
8 descends toward the work 70. At this time, in order to shorten the processing time, the cutting blade 48 is lowered at a higher speed than at the time of cutting until the cutting blade 48 reaches the work 70 (step S1). The fact that the cutting blade 48 has reached the work 70 is detected when the load applied to the cutting blade 48 has increased or when the cutting blade 48 has descended to a position set by the operation panel 96.

Then, the cutting is started.
The cutting blade 48 is lowered at a cutting speed V lower than the normal cutting speed in order to prevent chipping of the cutting blade 48 (step S).
3). The cutting speed V is set in advance by the operation panel 96.

The time for cutting at the cutting speed V lower than the normal cutting speed is preset by the operation panel 96 as T0, T1, and T2.
Cutting is performed at a low cutting speed V (steps S5 and S7). Subsequently, during the time T1, the cutting is performed at a similarly low cutting speed V, during which the addition of the load value x1 applied to the cutting blade 48, the addition of the sampling time, and the number of routines are performed at a predetermined sampling cycle. It is stored (step S9, step S11). The load values x1 and x2 (described later) are calculated by detecting the load current of the rotating shaft motor 72 with the load current detector 80.

When the cutting time T1 at the cutting speed V lower than the normal cutting speed elapses, the total load value x1 is divided by the number of routines, and the load average X1 is calculated and stored in the RAM 92 (step S1). S13). Thereafter, during the time T2, the addition of the load value x2 of the cutting blade 48, the addition of the sampling time, and the addition of the number of routines are performed at a predetermined sampling cycle as described above, and are stored in the RAM 92 (step S15, Step S17). Note that the cutting speed during the first time T2 is the low cutting speed V as described above.

When the time T2 has elapsed, the load average x2 is calculated by dividing the total load value x2 by the number of routines and stored in the RAM 92 (step S19). As described above, during the descent of the cutting blade 48, the load average is monitored at time T1 and thereafter at every time T2.

Then, by determining whether or not the load average X2 is equal to or greater than the load upper limit value, it is determined whether or not an abnormality has occurred during disconnection (step S21). If the load average X2 is equal to or greater than the load upper limit value. For example, the disconnection is stopped assuming that an abnormality has occurred (step S23).

On the other hand, by determining whether or not the load average X2 has become equal to or less than the load lower limit value close to 0, the work 7
It is determined whether or not the cutting of 0 has been completed (step S2).
5) If the load average X2 is equal to or less than the lower load limit, the cutting operation is automatically terminated. Then, raise the cutting blade 48,
The rotation of the cutting blade 48 is stopped, and the process ends.

If the load average X2 is between the load upper limit value and the load lower limit value, the coefficient k for accelerating and decelerating the cutting speed is set to, for example, five steps (k1 to k1) based on a comparison between the load averages X1 and X2. k5) (step S27). For example, if the cutting speed V, which is the initial setting speed, is to be the minimum value among the cutting speeds that are variably set, the coefficient k
1 to k5 are values of 1 or more.

In step S27, the coefficient k is calculated based on the comparison between the load average X2 and the previous load average X2.
May be determined. In this case, for example, the coefficient k3 = 1, the coefficients k1 and k2 are set smaller than 1, and the coefficients k4 and k5 are set larger than 1.

Then, the cutting speed is set based on the determined coefficient k (step S29), and the process returns to step S15. In step S27, when determining the coefficient k based on the comparison between the load averages X1 and X2, the cutting speed is set to k × V (V: slow cutting speed), while the load average X2 and the previous load are set. When determining the coefficient k based on the comparison with the average X2, the cutting speed is set to k × v (v: previous cutting speed). As described above, by adjusting the cutting speed within a certain range so that the load applied to the cutting blade 48 is stabilized while detecting the load, it is possible to cut efficiently.

FIG. 7 shows the effect of the work cutting device 10.
This will be described with reference to FIG. In FIG. 7, the load and the cutting speed are indicated by a solid line and an alternate long and short dash line, respectively.

At the time of constant speed cutting without load detection, FIG.
As shown in (a), the load on the cutting blade 48 changes,
The burden on the cutting blade 48 increases. However, when the load is detected, the load can be stabilized by controlling the cutting speed in real time according to the load applied to the cutting blade 48 as shown in FIG. 7B, so that the load on the cutting blade 48 can be reduced. And cutting accuracy can be improved. FIG.
As can be seen by comparing (a) and (b), the time required for disconnection at the time of load detection can be reduced, and the productivity can be improved.

Ideally, in the work cutting device, the cutting blade is mounted so as to be completely perpendicular to the rotating shaft. In this case, a cutting reaction force is generated in the cutting blade surface, and the cutting blade is moved. No force is generated to deform it perpendicular to that plane. However, in reality, in the conventional work cutting device 1, as shown in FIG.
0.04 degrees), and the tangential component f1 of the cutting reaction force f
The component force f2 (= f1 × sin θ) corresponding to the mounting error of the cutting blade 3 acts as a force for deforming the cutting blade 3, and the cutting blade 3
Are deformed, and the cutting accuracy is deteriorated.

On the other hand, according to the work cutting device 10, as shown in FIG. 8, even if there is a cutting blade mounting error θ similar to the conventional one, the cutting reaction force F is substantially in the direction of the center of the rotary shaft 30. Therefore, the tangential component F1 becomes small, and the component F2 (= F1 × sin θ) for deforming the cutting blade 48 is necessarily smaller than that of the prior art shown in FIG.
The load on the cutting blade 48 is also reduced. As a result, the deformation of the cutting blade 48 can be reduced, and the deflection of the cutting blade 48 is reduced, so that the cutting accuracy is improved.

Further, as shown in FIG. 10, it can be seen that the stroke L1 of the cutting blade 48 from the start of cutting to the end of cutting by the work cutting device 10 can be shortened as compared with the stroke L2 of the prior art shown in FIG. That is, by cutting from above, the cutting stroke can be shortened, and the work cutting time can be greatly reduced.

As an experimental example, when the arc-shaped neodymium magnet shown in FIG. 12 is cut, the work cutting time required for the conventional work cutting apparatus 1 was 18.5 minutes. It could be reduced to 14.5 minutes.

Further, by using a so-called double-sided structure in which both sides of the rotary shaft 30 are supported by the support portions 26a and 26b, the holding of the cutting blade 48 can be stabilized, and the shaking of the cutting blade 48 during cutting can be reduced. Because you can
For example, when cutting a brittle work such as a sintered body, chipping can be suppressed, and cutting accuracy can be improved. Further, since the deflection of the cutting blade 48 can be reduced, the number of the cutting blades 48 that can be attached to the rotating shaft 30 can be increased, and as a result, the number of cuts in one operation can be increased, thereby improving productivity. it can.

A supporting portion 26a for supporting both sides of the rotating shaft 30
And 26b attached to the slider 18 as one unit, it is possible to improve the holding accuracy of the cutting blade 48, particularly the accuracy in the horizontal direction.

Further, tapered portions 38a and 38b are formed at both ends of the arbor 32 of the rotating shaft 30, and the tapered portions 38a and 38b are respectively
The fitting precision of the cutting blade 48 can be improved by fitting it into the receiving portions 42a and 42b of the 4a and 34b.

The belt 5 is controlled by the tension adjusting means 56.
By keeping the tension at 4 constant, slippage of the belt 54 can be prevented, and rotation of the belt 54 can be stabilized. This is particularly effective when the cutting blade 48 is moved up and down as in this embodiment.

In the above embodiment, the work 70
Although the case where the cutting blade 48 is moved toward is described, the present invention is not limited to this. For example, the work 54 may be moved toward the cutting blade 48, and further, the work 70 may be moved with respect to the cutting blade 48 during cutting. Any means for moving the work 70 or the cutting blade 48 such that the relative movement direction of the workpiece 70 is in the center direction of the cutting blade 48 can be used.

[0062]

According to the present invention, since the both sides of the rotating shaft are supported, it is possible to reduce the deviation of the cutting blade during cutting, thereby improving the cutting accuracy. In addition, since the deflection of the cutting blade can be reduced, the number of cutting blades that can be attached to the rotating shaft can be increased, and as a result, the number of cuts in one operation can be increased, so that productivity can be improved.

In addition, a supporting portion for supporting both sides of the rotating shaft
By attaching to one unit, the holding accuracy of the cutting blade, particularly the accuracy in the horizontal direction, can be improved.

Further, by automatically detecting the load applied to the cutting blade and adjusting the cutting speed according to the load, the cutting speed is adjusted so that the load applied to the cutting blade becomes stable regardless of the shape of the work. Since the workpiece can be cut while being cut, automation can be performed, cutting efficiency can be improved, and cutting accuracy can be improved. Further, by controlling the cutting speed in real time according to the load applied to the cutting blade, the load can be stabilized, so that the load on the cutting blade can be reduced and the cutting accuracy can be improved. Also,
The time required for cutting can be reduced, and productivity can be 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 perspective view illustrating a main part of a support part and a rotating shaft.

FIG. 3 is a side view showing a main part of the embodiment of FIG. 1;

FIG. 4 is a block diagram showing an electrical configuration of the embodiment of FIG.

FIG. 5 is a flowchart showing the operation of the embodiment of FIG. 1;

FIG. 6 is a flowchart showing a continuation of the operation in FIG. 5;

FIGS. 7A and 7B are graphs showing a cutting speed and a load with respect to time, where FIG. 7A shows a constant speed cutting without load detection, and FIG.
Indicates the time of load detection.

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 shown in FIG. 1;

9 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. 13;

FIG. 10 is an illustrative view showing a cutting stroke of the embodiment shown in FIG. 1;

FIG. 11 is an illustrative view showing a cutting stroke of the related art shown in FIG. 13;

FIG. 12 is a perspective view showing an example of a work.

FIG. 13 is a perspective view showing an example of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Work cutting apparatus 16a, 16b, 46a, 46b Rail 18 Slider 20 Slider support part 22, 36a, 36b Screw 24 Elevating motor 26a, 26b, 62 Support part 28 Cutting blade block 30, 51, 60 Rotation axis 32 A bar 34a , 34b Rotation support part 38a, 38b Taper part 42a, 42b Receiving part 48 Cutting blade 50, 58 Pulley 54 Belt 56 Tension adjusting means 64 Air cylinder 66 Table 68 Pasting plate 70 Work 72 Rotary shaft motor 76 Lifting motor control circuit 78 Rotary shaft Motor control circuit 80 Load current detector 82 Control unit 96 Operation panel

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshihiko Kondo 2-15-17 Egawa, Shimamoto-cho, Mishima-gun, Osaka Prefecture Yamazaki Works, Sumitomo Special Metals Co., Ltd. -3-4 Inside Nisshin Kogyo Co., Ltd. (56) Reference JP-A-1-301050 (JP, A) JP-A-10-202500 (JP, A) JP-A-10-202649 (JP, A) JP 63-74562 (JP, A) JP-A-6-106414 (JP, A) JP-A-4-28971 (JP, A) JP-A-4-189463 (JP, A) , U) Fully open 1986-61-17651 (JP, U) Fully open 550-175055 (JP, U) Fully open 1988-197047 (JP, U) Really publicly open 47-36633 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B24B 27/06 B24B 47/10 B24B 49/16 B28D 5/02

Claims (9)

(57) [Claims] 1. A work cutting device for cutting a fixed work by rotating a cutting blade while moving the cutting blade in a vertical direction, a support portion for supporting both sides of a rotary shaft on which the cutting blade is mounted, and the support. A workpiece cutting device comprising: a unit to which a part is attached and which is movable in a vertical direction. 2. A work cutting apparatus for cutting a work by rotating a cutting blade, the work cutting device having two support portions for supporting both sides of a rotary shaft on which the cutting blade is mounted, and one of the support portions being the other. A workpiece cutting device, which is attached to a supporting portion so as to be movable in an axial direction of the rotation shaft. 3. The apparatus according to claim 1, further comprising: means for moving the work or the cutting blade such that a relative movement direction of the work with respect to the cutting blade at the time of cutting is in a center direction of the cutting blade. 3. The work cutting device according to 2. 4. The apparatus according to claim 1, further comprising a load detecting unit configured to detect a load applied to the cutting blade, and a cutting speed adjusting unit configured to adjust a cutting speed of the cutting blade according to the load. 3. The workpiece cutting device according to claim 1. 5. A work cutting device for cutting a work by rotating a cutting blade, a means for detecting a load average X1 applied to the cutting blade at a time T1 after the start of cutting the work, each time following the time T1. Means for detecting a load average X2 applied to the cutting blade for each T2, and a cutting speed of the cutting blade in each of the second and subsequent times T2 of the time T2, the load average of the load average X1 and the load average of the previous time T2. X
2. A workpiece cutting device, comprising: means for adjusting based on (2). 6. A work cutting apparatus for cutting a work by rotating a cutting blade, means for detecting a load average X2 applied to the cutting blade for each time T2, and a means for detecting a load average X2 for each time T2. A workpiece cutting device, comprising: means for adjusting a cutting speed of the cutting blade based on a load average X2 at a time T2 two times before and a load average X2 at a previous time T2. 7. A work cutting method for cutting a work by rotating a cutting blade, wherein: fixing the work; supporting both sides of a rotating shaft on which the cutting blade is mounted by supporting parts; A method of cutting the work by rotating the cutting blade while moving the cutting blade in the vertical direction as the unit moves in the vertical direction in a state of being attached to one unit, thereby cutting the work. . 8. A work cutting method for cutting a work by rotating a cutting blade, wherein a step of detecting a load average X1 applied to the cutting blade at a time T1 after the start of cutting the work, each time following the time T1. Detecting a load average X2 applied to the cutting blade for each T2;
2. A method for cutting a workpiece, comprising a step of adjusting the cutting speed of the cutting blade in each of the second and subsequent times T2 among the second based on the load average X1 and the load average X2 in the previous time T2. 9. A method of cutting a workpiece by rotating a cutting blade, wherein a step of detecting a load average X2 applied to the cutting blade at each time T2, and a certain time T among the times T2.
2. A method for cutting a workpiece, comprising the step of adjusting the cutting speed of the cutting blade in 2 based on the load average X2 of the time T2 two times before and the load average X2 of the previous time T2.