JP2021102250A - Jig and tool - Google Patents

Abstract

To provide a jig and a tool, which contribute to suppression of wear on a tip.SOLUTION: A jig and a tool include a blade 200 of a centerless grinding attachment 10A. The blade 200 comprises a tip 400 for coming into contact with a workpiece W, a body part 300 for supporting the tip 400, and a deformation control part 340 for urging the body part 300 to bow by a load imposed on the tip 400.SELECTED DRAWING: Figure 4

Description

The present invention relates to jigs and tools.

Jigs and tools include jigs and tools. The jig is used for positioning the work piece and the like. Tools are used to machine workpieces. In one example, the jig is composed of a body and a tip. The main body supports the tip. The tip comes into contact with the work piece. Patent Document 1 shows an example of a conventional jig.

Japanese Unexamined Patent Publication No. 2005-1045

For jigs and tools, it is preferable that wear of the tip portion is suppressed.

An object of the present invention is to provide a jig and tool that contributes to suppressing wear of a tip portion.

The jig and tool according to the present invention include a tip portion that comes into contact with a workpiece, a main body portion that supports the tip portion, and a deformation control portion that promotes bending of the main body portion due to a load applied to the tip portion.

According to the above-mentioned jig and tool, the bending of the main body makes it difficult for stress to be locally generated at the tip, and wear of the tip is suppressed.

In an example of the jig and tool, the main body portion has a first main body portion fixed to a support portion supporting the main body portion and a second main body portion provided between the first main body portion and the tip portion. Including, the deformation control unit is configured to promote bending of the second main body unit.

According to the above jigs and tools, the main body is easily bent.

In an example of the jig and tool, the deformation control unit includes a first control unit that promotes bending of the second main body portion by setting the length of the second main body portion.

According to the above jig and tool, the deformation control unit can be easily formed.

In an example of the jig and tool, the first control unit includes the second main body portion that is longer than the first main body portion.

According to the above jig and tool, the second main body portion is likely to be bent.

In an example of the jig and tool, the deformation control unit includes a second control unit that promotes deformation of the second main body portion by a partial change in the cross-sectional shape of the second main body portion.

According to the above jig and tool, the deformation control unit can be easily formed.

In an example of the jig and tool, the second control unit includes a recess provided in the second main body unit.

According to the above jig and tool, the deformation control unit can be easily formed.

In an example of the jig and tool, the recess is configured to be along a second reference direction orthogonal to the first reference direction in which the main body and the tip are aligned.

According to the above jig and tool, the second main body portion tends to be uniform.

In one example of the jig, the tip includes a sintered body.

According to the above jig and tool, the wear resistance of the tip portion is increased.

In an example of the jig and tool, the elastic modulus of the tip portion is larger than the elastic modulus of the main body portion.

According to the above jig and tool, the tip portion is not easily deformed.

In one example of the jig, the jig includes a jig.

According to the above jigs and tools, the tip portion that supports the workpiece is less likely to wear.

In one example of the jig, the jig comprises a thin plate.

According to the above jig and tool, a thin workpiece can be appropriately supported.

In one example of the jig, the jig includes a blade of a centerless grinding machine.

According to the above jigs and tools, local wear is unlikely to occur at the tip portion.

The jig and tool according to the present invention contribute to suppressing wear of the tip portion.

The figure which shows the machine tool including the jig tool of 1st Embodiment. The figure which shows the machine tool including the jig tool of 2nd Embodiment. Front view of the blade. Cross-sectional view of a blade or the like. The figure which shows the stress distribution of a non-control blade. The stress distribution of the blade is shown. The rear view of the blade of an Example. The figure which shows the machine tool including the jig tool of 3rd Embodiment. Sectional view of scraper etc.

(First Embodiment)
As shown in FIG. 1, the jig 100 is incorporated into, for example, a machine tool 10. A Cartesian coordinate system is used to describe the jig 100. The plane including the X-axis and the Y-axis appears in the plan view of the jig 100. The plane including the X-axis and the Z-axis appears in the front view of the jig 100. The plane including the Y-axis and the Z-axis appears in the side view of the jig 100. The direction parallel to the Z axis is the first reference direction. The direction parallel to the X-axis is the second reference direction. The direction parallel to the Y axis is the third reference direction.

The jig 100 includes a jig 100A and a tool 100B. The machine tool 10 processes the workpiece W. The workpiece W includes, for example, metal, wood, stone, and the like. Machining of the machine tool 10 includes, for example, cutting, drilling, grinding, polishing, rolling, forging, bending, and the like. The jig 100A incorporated in the machine tool 10 guides or determines the position of the workpiece W or the tool. The tool 100B incorporated in the machine tool 10 processes the workpiece W.

The jig 100 includes a main body 110 and a tip 120. The main body 110 and the tip 120 are arranged, for example, in the first reference direction. The main body 110 supports the tip 120. The tip portion 120 comes into contact with the workpiece W. The tip portion 120 is, for example, a member smaller than the main body portion 110. The jig 100 further includes a joint 130. The joint portion 130 joins the main body portion 110 and the tip portion 120. The configuration of the joint 130 will be illustrated. In the first example, the joint portion 130 joins the main body portion 110 and the tip portion 120 by metallurgical joining. In the second example, the joining portion 130 joins the main body portion 110 and the tip portion 120 by mechanical joining. In the third example, the joining portion 130 joins the main body portion 110 and the tip portion 120 by chemical joining. In the fourth example, the joint portion 130 joins the main body portion 110 and the tip portion 120 by at least two methods of the first to third examples.

The main body 110 includes the first main body 111. The support portion 20 includes a fixing portion 30. The first main body portion 111 is fixed to the fixing portion 30. The fixing portion 30 is configured so that the main body portion 110 can be attached and detached. In a state where the first main body portion 111 is fixed to the fixed portion 30, the support portion 20 supports the main body portion 110. The fixing portion 30 includes, for example, a coupling structure 31 or a chuck device 40. The configuration of the bond structure 31 will be illustrated. In the first example, the coupling structure 31 fixes the first main body portion 111 to the fixing portion 30 by using the threaded fastener 31A. In the second example, the first main body portion 111 is fixed to the fixing portion 30 by utilizing the fitting of the coupling structure 31.

The main body 110 includes a second main body 112. The first main body 111 and the second main body 112 are arranged in the first reference direction. The second main body 112 is provided between the first main body 111 and the tip 120. The joint portion 130 joins the second main body portion 112 and the tip portion 120. The relationship between the first main body 111 and the second main body 112 will be illustrated. In the first example, the first main body 111 and the second main body 112 are integrally formed. In the second example, the individually configured first main body 111 and the second main body 112 are joined. The form of joining the first main body portion 111 and the second main body portion 112 includes, for example, the same form as the form of joining the main body portion 110 and the tip portion 120 by the joining portion 130.

The relationship between the lengths of the main body 110 and the tip 120 with respect to the first reference direction will be illustrated. In the first example, the length of the main body 110 is longer than the length of the tip 120. The first example includes the following 11th to 14th examples. In the eleventh example, the length of the first main body portion 111 and the second main body portion 112 is longer than the length of the tip portion 120. In the twelfth example, the length of the first main body portion 111 is longer than the length of the tip portion 120, and the length of the second main body portion 112 is equal to or less than the length of the tip portion 120. In the thirteenth example, the length of the second main body portion 112 is longer than the length of the tip portion 120, and the length of the first main body portion 111 is equal to or less than the length of the tip portion 120. In the 14th example, the length of the first main body portion 111 and the second main body portion 112 is equal to or less than the length of the tip portion 120. In the second example, the length of the main body 110 is shorter than the length of the tip 120. In the third example, the length of the main body 110 and the length of the tip 120 are equal.

The relationship between the lengths of the first main body 111 and the second main body 112 in the eleventh example, the fourteenth example, the second example, and the third example will be illustrated. In the first example, the length of the first main body 111 is longer than the length of the second main body 112. In the second example, the length of the first main body 111 is shorter than the length of the second main body 112. In the third example, the length of the first main body 111 and the length of the second main body 112 are equal.

The tip portion 120 includes a contact surface 121 that comes into contact with the workpiece W. In one example, the contact surface 121 is configured to have high wear resistance. The tip 120 is made of, for example, a hard material. The tip 120 is, for example, a sintered body. The sintered body is, for example, a diamond sintered body, a cubic boron nitride sintered body, a ceramic sintered body, or a cemented carbide. The elastic modulus of the tip portion 120 is larger than the elastic modulus of the main body portion 110. The elastic modulus is, for example, the longitudinal elastic modulus. The tip 120 is, for example, a cube, a triangular pyramid, a pyramid, a prism, an octahedron, a cylinder, a cone, or a sphere, or a solid similar to these solids. The contact surface 121 includes one or more surfaces constituting the tip portion 120.

When the jig 100 is a jig 100A, the main body 110 of the jig 100A is, for example, a plate, a rod, a pillar, or a base. The type of plate is, for example, a steel plate. The type of steel sheet according to the rolling method is, for example, a cold-rolled steel sheet or a hot-rolled steel sheet. The type of steel plate according to the plate thickness is, for example, a thin plate, a middle plate, a thick plate, or an extra-thick plate. A load is applied to the tip portion 120 of the jig 100A by the relative movement of the workpiece W supported by the jig 100A and the jig 100A. The load applied to the tip 120 of the jig 100A is transmitted to the main body 110 of the jig 100A.

When the jig 100 is the tool 100B, the main body 110 of the tool 100B is, for example, a plate, a rod, or a pillar. A load is applied to the tip portion 120 of the tool 100B due to the relative movement between the workpiece W processed by the tool 100B and the tool 100B. The load applied to the tip 120 of the tool 100B is transmitted to the main body 110 of the tool 100B. Hereinafter, the load applied to the jig / tool 100 due to the relative movement of the jig / tool 100 and the workpiece W will be referred to as a “load during use”.

The jig 100 includes a deformation control unit 140 that promotes deformation of the main body 110 due to a load during use. The deformation control unit 140 promotes the deformation of the main body 110 so that the generation of local stress at the tip 120 is suppressed. The deformation of the main body 110 is, for example, the bending of the main body 110. With the deformation of the main body 110, the load during use is received in a wide range of the main body 110, and the generation of local stress at the tip 120 is suppressed. This contributes to suppressing wear of the tip portion 120.

The deformation control unit 140 includes, for example, at least one of the first control unit 141 and the second control unit 142. The first control unit 141 and the second control unit 142 are configured to promote the bending of the main body unit 110 by different methods. The first control unit 141 is configured to promote bending of the main body 110 by setting the length of the main body 110. The first control unit 141 includes a main body unit 110 having a length equal to or longer than the reference length. The reference length is determined so as to appropriately promote the bending of the main body 110. The reference length is determined according to, for example, the material of the main body 110, the cross-sectional shape of the main body 110, and one or more of the magnitudes of the load during use.

The second control unit 142 is configured to promote bending of the main body 110 by a partial change in the cross-sectional shape of the main body 110. The second control unit 142 includes, for example, at least one of a recess, a penetration, and a hollow. The recess is configured to open to the surface of the main body 110. The penetrating portion is configured to define a space penetrating the main body portion 110. The hollow portion is formed inside the main body portion 110.

(Second Embodiment)
As shown in FIG. 2, the jig 100 is incorporated into, for example, a centerless grinding device 10A. The centerless grinding machine 10A is an example of a machine tool 10. The elements of the second embodiment corresponding to the elements of the first embodiment are given the same reference numerals as the elements of the first embodiment. The workpiece W is made of, for example, a hard material. The workpiece W is, for example, a sintered body. The sintered body is, for example, a diamond sintered body, a cubic boron nitride sintered body, a ceramic sintered body, or a cemented carbide.

The centerless grinding device 10A includes a grindstone wheel 11, an adjusting wheel 12, a first support shaft 13, a second support shaft 14, a base 15, a support portion 20, and a jig 100. The base 15 supports the first support shaft 13 and the second support shaft 14 via bearings. The first support shaft 13 supports the grindstone 11. The grindstone 11 rotates around the central axis of the first support shaft 13. The grindstone 11 grinds the workpiece W. The adjusting wheel 12 rotates around the central axis of the second support shaft 14. The adjusting wheel 12 adjusts the rotation speed of the workpiece W. The support portion 20 is fixed to the base 15. The support portion 20 includes a guide portion. The guide portion is configured to guide the workpiece W to be conveyed. The guide portion includes a set of guide surfaces along the transport direction of the workpiece W. A space in which the workpiece W is arranged is formed between one guide surface and the other guide surface. The feeding method of the workpiece W is, for example, through feed or in feed. In through-feed grinding, the workpiece W is fed in a predetermined transport direction by the adjusting wheel 12.

The direction orthogonal to the height direction of the centerless grinding device 10A on the plane orthogonal to the central axis of the first support shaft 13 is referred to as the width direction of the centerless grinding device 10A. The direction orthogonal to the height direction and the width direction of the centerless grinding device 10A is referred to as the depth direction of the centerless grinding device 10A. The grindstone wheel 11 and the adjusting wheel 12 are arranged in the width direction at intervals. An arrangement space 16 in which the workpiece W is arranged is formed between the grindstone wheel 11 and the adjusting wheel 12.

The jig 100 includes a jig 100A that supports the workpiece W. The jig 100A includes a blade 200. The blade 200 is arranged below the arrangement space 16 so as to support the workpiece W. The blade 200 is fixed to the support portion 20 via the fixing portion 30. The blade 200 supports the workpiece W. The workpiece W supported by the blade 200 comes into contact with the blade 200, the grindstone 11, and the adjusting wheel 12, respectively.

The height direction of the blade 200 is parallel to the first reference direction. The width direction of the blade 200 is parallel to the second reference direction. The thickness direction of the blade 200 is parallel to the third reference direction. In one example, the height direction of the blade 200 is parallel to the height direction of the centerless grinding apparatus 10A. The width direction of the blade 200 is parallel to the depth direction of the centerless grinding apparatus 10A. The thickness direction of the blade 200 is parallel to the width direction of the centerless grinding apparatus 10A.

FIG. 3 shows a front view of the blade 200. FIG. 4 shows a cross section of the blade 200 and the like parallel to the height direction and the thickness direction of the blade 200. The blade 200 includes a main body 300, a tip 400, and a joint 210. The joint portion 210 joins the main body portion 300 and the tip portion 400. The configuration of the joint portion 210 conforms to the configuration of the joint portion 130 of the first embodiment.

The main body 300 is, for example, a steel plate. The type of steel sheet according to the rolling method is, for example, a cold-rolled steel sheet. The type of steel plate depending on the plate thickness is, for example, a thin plate. The main body 300 includes a first main body 310 and a second main body 320. The first main body 310 and the second main body 320 are arranged in the first reference direction.

The first main body portion 310 is fixed to the fixing portion 30. The fixing portion 30 is configured so that the main body portion 110 can be attached and detached. In a state where the first main body 310 is fixed to the fixed portion 30, the support 20 supports the main body 300. The fixing portion 30 includes, for example, a coupling structure 31. The coupling structure 31 fixes the first main body portion 310 to the fixing portion 30 by using the threaded fastener 31A and the nut 31B. The second main body 320 is provided between the first main body 310 and the tip 400. The joint portion 210 joins the second main body portion 320 and the tip portion 400.

The relationship between the first main body 310 and the second main body 320 will be illustrated. In the first example, the first main body 310 and the second main body 320 are integrally formed. In the second example, the individually configured first main body 310 and the second main body 320 are joined. The form of joining the first main body portion 310 and the second main body portion 320 includes, for example, the same form as the form of joining the main body portion 300 and the tip portion 400 by the joining portion 210.

The relationship between the lengths of the main body portion 300 and the tip portion 400 with respect to the first reference direction conforms to the relationship between the lengths of the main body portion 110 and the tip portion 120 of the first embodiment. The relationship between the lengths of the first main body portion 310 and the second main body portion 320 with respect to the first reference direction conforms to the relationship between the lengths of the first main body portion 111 and the second main body portion 112 of the first embodiment.

The surface 330 of the main body 300 includes a first main surface 331, a second main surface 332, a side surface 333, an upper surface 334, and a bottom surface 335. One of the first main surface 331 and the second main surface 332 corresponds to the front surface of the main body 300. The other of the first main surface 331 and the second main surface 332 corresponds to the back surface of the main body 300. In one example, the first main surface 331 corresponds to the front surface of the main body 300. The second main surface 332 corresponds to the back surface of the main body 300. The upper surface 334 is included in the joint 210.

The tip 400 is, for example, a cemented carbide plate. The elastic modulus of the tip portion 400 is larger than the elastic modulus of the main body portion 300. The elastic modulus is, for example, the longitudinal elastic modulus. The surface 410 of the tip 400 includes a first main surface 411, a second main surface 412, a side surface 413, a bottom surface 414, and a contact surface 420. One of the first main surface 411 and the second main surface 412 corresponds to the front surface of the tip portion 400. The other of the first main surface 411 and the second main surface 412 corresponds to the back surface of the tip portion 400. In one example, the first main surface 411 corresponds to the front surface of the tip portion 400. The second main surface 412 corresponds to the back surface of the tip portion 400. The contact surface 420 corresponds to the upper surface of the tip 400. The bottom surface 414 is included in the joint 210.

The contact surface 420 supports the workpiece W. The contact surface 420 is configured to have high wear resistance. The portion of the tip 400 including the contact surface 420 is a diamond sintered body. The contact surface 420 is made of a diamond sintered body. The contact surface 420 is flat. In the side view of the blade 200, the contact surface 420 is inclined with respect to the first reference direction. The contact surface 420 includes a first long side 420A and a second long side 420B parallel to the second reference direction. The first long side 420A corresponds to the boundary between the contact surface 420 and the first main surface 411. The second long side 420B corresponds to the boundary between the contact surface 420 and the second main surface 412. The contact surface 420 is inclined from the first long side 420A toward the second long side 420B so as to be separated from the bottom surface 414. In one example, the blade 200 is arranged such that the first long side 420A is adjacent to the adjusting wheel 12 and the second long side 420B is adjacent to the grindstone 11 in the width direction of the centerless grinding device 10A.

The height of the blade 200 is the length of the blade 200 with respect to the first reference direction. The width of the blade 200 is the length of the blade 200 with respect to the second reference direction. The thickness of the blade 200 is the length of the blade 200 with respect to the third reference direction. In one example, the height of the blade 200 is the distance between the bottom surface 335 of the main body 300 and the second long side 420B of the contact surface 420. The width of the blade 200 is the distance between one side surface 333 of the main body 300 and the other side surface 333, or the distance between one side surface 413 of the tip portion 400 and the other side surface 413. The thickness of the blade 200 is the distance between the first main surface 331 and the second main surface 332 of the main body 300, or the distance between the first main surface 411 and the second main surface 412 of the tip portion 400. In one example, the thickness of the main body 300 and the thickness of the tip 400 are equal. The thickness of the blade 200 is selected according to the diameter of the workpiece W. When the workpiece W is a thin rod, the thickness of the blade 200 is thin according to the diameter of the workpiece W.

The relationship between the height of the blade 200 and the width of the blade 200 will be illustrated. In the first example, the height of the blade 200 is shorter than the width of the blade 200. In the second example, the height of the blade 200 is longer than the width of the blade 200. In the third example, the height of the blade 200 and the width of the blade 200 are equal. The relationship between the dimensions of the main body 300 and the dimensions of the tip 400 will be illustrated. The height of the main body 300 is higher than the height of the tip 400. The width of the main body 300 and the width of the tip 400 are equal. The thickness of the main body 300 and the thickness of the tip 400 are equal.

The first main body 310 includes a penetrating portion 311 in which a part of the threaded fastener 31A is arranged. The penetrating portion 311 is configured to define a space penetrating the first main body portion 310 in the third reference direction. The penetrating portion 311 opens in each of the first main surface 331 and the second main surface 332. The penetrating portion 311 includes, for example, at least one of a groove penetrating the first main body portion 310 and a hole penetrating the first main body portion 310.

The support portion 20 includes an arrangement portion 21, a reference surface 22, and a through hole 23. The arranging portion 21 includes a first arranging surface 21A and a second arranging surface 21B arranged in the width direction of the centerless grinding apparatus 10A at intervals. An arrangement space 21C in which the first main body 310 is arranged is formed between the first arrangement surface 21A and the second arrangement surface 21B. The reference surface 22 faces the direction in which the workpiece W is arranged. The through hole 23 is formed so that the threaded fastener 31A can be arranged.

The first main body 310 is arranged in the arrangement space 21C. The threaded fastener 31A is arranged in the through hole 23 of the support portion 20 and the through portion 311 of the first main body portion 310. By engaging the nut 31B with the male threaded portion of the threaded fastener 31A, the first main body portion 310 is sandwiched between the arranging portions 21. The first arrangement surface 21A is pressed against the first main surface 331 of the first main body 310, and the second arrangement surface 21B is pressed against the second main surface 332 of the first main body 310. The second main body 320 projects in the height direction of the centerless grinding device 10A with respect to the reference surface 22 of the support 20.

When the workpiece W is processed by the centerless grinding device 10A, the grindstone wheel 11 and the adjusting wheel 12 rotate in the same direction. The workpiece W rotates in a direction opposite to that of the grindstone 11 and the adjusting wheel 12 while being supported by the contact surface 420 of the blade 200. The grindstone wheel 11 and the adjusting wheel 12 and the workpiece W move relatively. The portion of the workpiece W that comes into contact with the grindstone 11 (hereinafter referred to as “grinding target portion WA”) is ground by the grindstone 11. Grinding increases the roundness of the grinding target portion WA. A load is applied to the tip 400 of the blade 200 due to the relative movement of the grindstone 11 and the adjusting wheel 12 and the workpiece W. The in-use load applied to the tip portion 400 is transmitted to the main body portion 300.

The blade 200 includes a deformation control unit 340 that promotes bending of the main body 300 due to a load during use. The deformation control unit 340 promotes the bending of the main body 300 so that the generation of local stress at the tip 400 is suppressed. With the bending of the main body 300, the load during use is received in a wide range of the main body 300, and the generation of local stress at the tip 400 is suppressed. This contributes to suppressing the wear of the tip portion 400.

The deformation control unit 340 includes at least one of a first control unit 341 and a second control unit 342. In the example shown in FIG. 4, the deformation control unit 340 includes a first control unit 341 and a second control unit 342. The first control unit 341 and the second control unit 342 are configured to promote the bending of the main body unit 300 by different methods.

The first control unit 341 is configured to promote the bending of the main body 300 by setting the length of the second main body 320. The first control unit 341 includes a second main body unit 320 having a length equal to or longer than the reference length. The reference length is determined so as to appropriately promote the bending of the main body 300. The reference length is determined according to, for example, the material of the main body 300, the cross-sectional shape of the main body 300, and one or more of the magnitudes of the load during use. The height HA of the second main body portion 320 is the distance between the portion of the main body portion 300 corresponding to the reference surface 22 of the support portion 20 and the upper surface 334 of the main body portion 300. The height HA of the second main body 320 corresponds to the length of the main body 300 protruding in the first reference direction with respect to the reference surface 22 of the support 20.

The second control unit 342 is configured to promote the bending of the main body 300 by a partial change in the cross-sectional shape of the second main body 320. The second control unit 342 includes, for example, at least one of a recess, a penetrating portion, and a hollow portion. The recess is configured to open to the surface of the second main body 320. The penetrating portion is configured to define a space penetrating the second main body portion 320. The hollow portion is formed inside the second main body portion 320.

In the example shown in FIG. 4, the second control unit 342 includes a recess 321 provided in the second main body unit 320. The configuration of the recess 321 will be illustrated. In the first example, the recess 321 includes one or more grooves that are long in a predetermined direction. The predetermined direction is, for example, the width direction of the blade 200 or the direction intersecting the width direction of the blade 200. In the second example, the recess 321 includes one or more recesses having an isotropic shape as compared to the groove. The plurality of recesses are arranged in a predetermined direction, for example. The predetermined direction is, for example, the width direction of the blade 200 or the direction intersecting the width direction of the blade 200. In the third example, the recess 321 includes the configurations of the first example and the second example.

An example will be given of a portion where the recess 321 is formed in the second main body 320. In the first example, the recess 321 is provided on the first main surface 331. In the second example, the recess 321 is provided on the second main surface 332. In the third example, the recess 321 is provided on each of the first main surface 331 and the second main surface 332.

The position of the recess 321 with respect to the height direction of the blade 200 will be illustrated. In the first example, the recess 321 is provided in a portion of the second main body 320 including a portion adjacent to the first main body 310. In the second example, the recess 321 is provided in the portion of the second main body 320 including the portion adjacent to the joint 210. In the third example, the recess 321 is provided between the position of the first example and the position of the second example.

In the example shown in FIG. 4, the recess 321 includes a groove 322 that is long in the width direction of the blade 200. The groove 322 is provided on the second main surface 332. The groove 322 is recessed toward the first main surface 331 with respect to the second main surface 332. The groove 322 opens in the second main surface 332. The length of the groove 322 in the width direction of the blade 200 is referred to as the length of the groove 322. The length of the groove 322 in the height direction of the blade 200 is referred to as the width of the groove 322. The length of the groove 322 in the thickness direction of the blade 200 is referred to as the depth of the groove 322.

The length of the groove 322 will be illustrated. In the first example, the length of the groove 322 is equal to the width of the main body 300. The groove 322 opens on the side surface 333 of the main body 300. In the second example, the length of the groove 322 is shorter than the width of the main body 300 and longer than the height of the main body 300. In the third example, the length of the groove 322 is shorter than the width of the main body 300 and shorter than the height of the main body 300. In the fourth example, the length of the groove 322 is shorter than the width of the main body 300 and is equal to the height of the main body 300.

The width of the groove 322 will be illustrated. In the first example, the width of the groove 322 is longer than the height of the tip 400. In the second example, the width of the groove 322 is shorter than the height of the tip 400. In the third example, the width of the groove 322 is equal to the height of the tip 400. In the fourth example, the width of the groove 322 is longer than the height of the first main body 310. In the fifth example, the width of the groove 322 is shorter than the height of the first main body 310. In the sixth example, the width of the groove 322 is equal to the height of the first main body 310.

The width setting form, which is the setting form of the width of the groove 322 with respect to the longitudinal direction of the groove 322, is classified into, for example, a first width setting form and a second width setting form. In the portion to which the first width setting form is applied, the width of the groove 322 is constant in the longitudinal direction of the groove 322. In the portion to which the second width setting form is applied, the width of the groove 322 differs depending on the portion of the groove 322 in the longitudinal direction.

The configuration of the groove 322 in relation to the width setting form will be illustrated. In the first example, the first width setting form is applied to the entire groove 322. In the second example, the second width setting form is applied to the entire groove 322. In the third example, the groove 322 includes a portion to which the first width setting form is applied and a portion to which the second width setting form is applied. The number of parts to which the first width setting form is applied is one or more. The number of parts to which the second width setting form is applied is one or more. When a plurality of portions to which the first width setting form is applied are included in the groove 322, the widths of the respective portions are equal or different. When the groove 322 includes a plurality of portions to which the second width setting form is applied, the shapes of the respective portions are equal or different.

The depth of the groove 322 will be illustrated. In the first example, the depth of the groove 322 is shallower than half the thickness of one main body 310. In the second example, the depth of the groove 322 is equal to half the thickness of one main body 310. In the third example, the depth of the groove 322 is deeper than half the thickness of one main body 310.

The depth setting form, which is the setting form of the depth of the groove 322 with respect to the longitudinal direction of the groove 322, is classified into, for example, a first depth setting form and a second depth setting form. In the portion to which the first depth setting form is applied, the depth of the groove 322 is constant in the longitudinal direction of the groove 322. In the portion to which the second depth setting form is applied, the depth of the groove 322 differs depending on the portion of the groove 322 in the longitudinal direction.

The configuration of the groove 322 in relation to the depth setting form will be illustrated. In the first example, the first depth setting form is applied to the entire groove 322. In the second example, the second depth setting form is applied to the entire groove 322. In the third example, the groove 322 includes a portion to which the first depth setting form is applied and a portion to which the second depth setting form is applied. The number of portions to which the first depth setting form is applied is one or more. The number of portions to which the second depth setting form is applied is one or more. When the groove 322 includes a plurality of portions to which the first depth setting mode is applied, the depths of the respective portions are equal or different. When the groove 322 includes a plurality of portions to which the second depth setting mode is applied, the shapes of the respective portions are equal or different.

When the workpiece W is machined, a load is applied to the tip 400 of the blade 200 during use, and stress is generated at the tip 400. The stress distribution of the tip portion 400 is different between the blade 200 including the deformation control unit 340 and the blade not including the deformation control unit 340 (hereinafter referred to as “non-control blade”). The configuration of the non-control blade is different from that of the blade 200 in the following points, and has the same configuration as the blade 200 in other respects. The same reference numerals are given to the elements common to each blade. The height of the second main body 320 of the non-control blade is substantially zero. That is, the main body 300 of the non-control blade does not include the second main body 320. The joining portion 210 of the non-control blade joins the first main body portion 310 and the tip portion 400. When the non-control blade is fixed to the support portion 20, only the tip portion 400 projects from the reference surface 22 of the support portion 20.

An example of the analysis result regarding the stress of the blade 200 and the tip portion 400 of the non-control blade will be described with reference to FIGS. 5 and 6. The levels of stress generated in the blade 200 are classified into four levels, 1st to 4th. Each level indicates the relative stress magnitude at each of the blade 200 and the uncontrolled blade. The stress contained in the first level is the largest of the four levels. The stress contained in the second level is the second largest after the first level. The stress contained in the third level is the second largest after the second level. The stress contained in the fourth level is zero or substantially zero. The region where the first level stress is distributed is referred to as "first region R1". The region where the second level stress is distributed is referred to as "second region R2". The region where the stress of the third level is distributed is referred to as "third region R3". The region where the fourth level stress is distributed is referred to as "fourth region R4".

The contact surface 420 is divided into, for example, a first contact surface 421, a second contact surface 422, a third contact surface 423, and a fourth contact surface 424. The first contact surface 421 comes into contact with the grinding target portion WA of the workpiece W. The second contact surface 422 is located on both sides of the first contact surface 421 so as to sandwich the first contact surface 421 in the width direction of the blade 200. That is, the contact surface 420 includes two second contact surfaces 422. The third contact surface 423 is located on both sides of the second contact surface 422 so as to sandwich the first contact surface 421 and the second contact surface 422 in the width direction of the blade 200. That is, the contact surface 420 includes two third contact surfaces 423. The fourth contact surface 424 is located on both sides of the third contact surface 423 so as to sandwich the first to third contact surfaces 421 to 423 in the width direction of the blade 200. That is, the contact surface 420 includes two fourth contact surfaces 424. The fourth contact surface 424 extends between the third contact surface 423 and the short side 420C of the contact surface 420. The length of the first contact surface 421 in the width direction of the blade 200 corresponds to the length of the grinding target portion WA of the workpiece W. The lengths of the second to fourth contact surfaces 422 to 424 with respect to the width direction of the blade 200 are arbitrarily set. In one example, the lengths of the second to fourth contact surfaces 422 to 424 are equal. The relationship between the classification of the contact surfaces 420 and the lengths of the contact surfaces 421 to 424 is common to the non-control blades.

As shown in FIG. 5, in the non-controlled blade, the first region R1 is distributed in the range around the center of the first contact surface 421. The second region R2 is distributed in a range adjacent to the first region R1 on the first contact surface 421. The third region R3 is distributed in a range adjacent to the second region R2 on the first contact surface 421. The fourth region R4 is distributed on the second to fourth contact surfaces 422 to 424. As described above, in the non-control blade, the stress is concentratedly distributed on the first contact surface 421.

As shown in FIG. 6, in the blade 200, the first region R1 is distributed over the entire first contact surface 421 and a part of the second contact surface 422. The second region R2 is distributed in a range adjacent to the first region R1 on the second contact surface 422 and a range adjacent to the second contact surface 422 on the third contact surface 423. The third region R3 is distributed in a range adjacent to the second region R2 on the third contact surface 423 and a range adjacent to the third contact surface 423 on the fourth contact surface 424. The fourth region R4 is distributed in a range adjacent to the third region R3 on the fourth contact surface 424. The range in which the fourth region R4 is distributed is the vicinity of the short side 420C on the fourth contact surface 424. As described above, in the blade 200, stress is generated over substantially the entire contact surface 420, and it is difficult for the stress to concentrate on the first contact surface 421. This contributes to suppressing the wear of the tip portion 400.

(Example)
Examples of the workpiece W and the blade 200 will be described. FIG. 7 shows a rear view of the blade 200 of the embodiment. The workpiece W is a rod of a diamond sintered body. The final product obtained from the work piece W that has undergone grinding is, for example, a shaft that supports a rotating body. The rotating body is made of, for example, a hard material. The rotating body is, for example, a sintered body. The sintered body is, for example, a diamond sintered body, a cubic boron nitride sintered body, a ceramic sintered body, or a cemented carbide. In one example, the rotating body is a scribing wheel used for scribing a brittle material substrate. The diameter of the workpiece W is included in the range of, for example, 2 mm or less.

The main body 300 of the blade 200 is a cold-rolled steel plate. The tip 400 of the blade 200 is a cemented carbide. A part of the tip portion 400 including the contact surface 420 is a diamond sintered body. The form of joining of the joining portion 210 is brazing or mechanical joining. The thickness of the blade 200 is thin according to the diameter of the workpiece W. The type of blade 200 depending on the plate thickness is a thin plate. The thickness of the blade 200 is included in the range of, for example, 2 mm or less.

The diameter of the workpiece W is 0.8 mm. The height of the blade 200 is 12.4 mm. The width of the blade 200 is 26 mm. The thickness of the blade 200 is 0.6 mm. The height of the main body 300 is 9.2 mm. The width of the main body 110 is 26 mm. The thickness of the main body 300 is 0.6 mm. The height of the first main body 310 is 4.5 mm. The height of the second main body 320 is 4.7 mm. The height of the tip 400 is 3.2 mm. The width of the tip 400 is 26 mm. The thickness of the tip portion 400 is 0.6 mm. The length of the groove 322 is 26 mm. The width of the groove 322 is 3 mm. The depth of the groove 322 is 0.25 mm.

The penetrating portion 311 of the first main body portion 310 includes a plurality of grooves 312. The groove 312 is long in the height direction of the blade 200. The groove 312 includes a first end 312A, a second end 312B, and a straight line 312C. The shape of the first end portion 312A of the groove 312 is a semicircle corresponding to the shape of the threaded fastener 31A. The second end 312B of the groove 312 opens to the bottom 335 of the main body 300. The straight portion 312C is formed between the first end portion 312A and the second end portion 312B. The length of the straight portion 312C is 2.6 mm. The width of the straight portion 312C is 3.2 mm. The radius of curvature of the first end portion 312A is 1.6 mm.

(Third Embodiment)
As shown in FIG. 8, the jig 100 is incorporated into, for example, the scraper processing apparatus 10B. The scraper processing apparatus 10B is an example of a machine tool 10. The elements of the third embodiment corresponding to the elements of the first embodiment are given the same reference numerals as the elements of the first embodiment.

The workpiece W is made of, for example, a hard material. The workpiece W is, for example, a sintered body. The sintered body is, for example, a diamond sintered body, a cubic boron nitride sintered body, a ceramic sintered body, or a cemented carbide. The scraper processing apparatus 10B includes an apparatus main body 50, a support portion 20, and a jig tool 100. The apparatus main body 50 includes a base 51 and a drive unit 52. The base 51 supports the workpiece W. The drive unit 52 is fixed to the base 51. The support portion 20 is coupled to the drive portion 52.

The jig 100 includes a tool 100B for machining the workpiece W. Tool 100B includes scraper 500. The fixing portion 30 of the support portion 20 includes a chuck device 40. The chuck device 40 is provided at the tip of the support portion 20. The scraper 500 is fixed to the support portion 20 via the fixing portion 30. The drive unit 52 moves the support unit 20 in a predetermined scanning direction, and scans the scraper 500 with respect to the workpiece W. The workpiece W is processed by scanning the scraper 500.

In the front view of the scraper processing device 10B, the direction orthogonal to the height direction of the scraper processing device 10B is referred to as the width direction of the scraper processing device 10B. The direction orthogonal to the height direction and the width direction of the scraper processing device 10B is referred to as the depth direction of the scraper processing device 10B. In one example, the predetermined scanning direction is parallel to the width direction of the scraper processing apparatus 10B.

The height direction of the scraper 500 is parallel to the first reference direction. The width direction of the scraper 500 is parallel to the second reference direction. The thickness direction of the scraper 500 is parallel to the third reference direction. In one example, the height direction of the scraper 500 is parallel to the height direction of the scraper processing apparatus 10B. The width direction of the scraper 500 is parallel to the depth direction of the scraper processing apparatus 10B. The thickness direction of the scraper 500 is parallel to the width direction of the scraper processing apparatus 10B.

FIG. 9 shows a cross section of the scraper 500 and the like parallel to the height direction and the thickness direction of the scraper 500. The scraper 500 includes a main body 600, a tip 700, and a joint 510. The joint portion 510 joins the main body portion 600 and the tip portion 700. The configuration of the joint portion 510 conforms to the configuration of the joint portion 130 of the first embodiment.

The main body 600 is, for example, a steel plate. The type of steel sheet according to the rolling method is, for example, a cold-rolled steel sheet. The type of steel plate depending on the plate thickness is, for example, a thin plate. The main body 600 includes a first main body 610 and a second main body 620. The first main body portion 610 and the second main body portion 620 are arranged in the first reference direction.

The first main body portion 610 is fixed to the fixing portion 30. The fixing portion 30 is configured so that the first main body portion 610 can be attached and detached. In a state where the first main body portion 610 is fixed to the fixed portion 30, the support portion 20 supports the main body portion 600. The second main body portion 620 is provided between the first main body portion 610 and the tip portion 700. The joint portion 510 joins the second main body portion 620 and the tip portion 700.

The relationship between the first main body 610 and the second main body 620 will be illustrated. In the first example, the first main body 610 and the second main body 620 are integrally formed. In the second example, the individually configured first main body portion 610 and the second main body portion 620 are joined. The form of joining the first main body portion 610 and the second main body portion 620 includes, for example, the same form as the form of joining the main body portion 600 and the tip portion 700 by the joining portion 510.

The relationship between the lengths of the main body portion 600 and the tip portion 700 with respect to the first reference direction conforms to the relationship between the lengths of the main body portion 110 and the tip portion 120 of the first embodiment. The relationship between the lengths of the first main body portion 610 and the second main body portion 620 with respect to the first reference direction conforms to the relationship between the lengths of the first main body portion 111 and the second main body portion 112 of the first embodiment.

The surface 630 of the main body 600 includes a first main surface 631, a second main surface 632, a side surface 633, an upper surface 634, and a bottom surface 635. One of the first main surface 631 and the second main surface 632 corresponds to the front surface of the main body 600. The other of the first main surface 631 and the second main surface 632 corresponds to the back surface of the main body 600. In one example, the first main surface 631 corresponds to the front surface of the main body 600. The second main surface 632 corresponds to the back surface of the main body 600. The upper surface 634 is included in the joint 510.

The tip 700 is, for example, a cemented carbide plate. The elastic modulus of the tip portion 700 is larger than the elastic modulus of the main body portion 600. The elastic modulus is, for example, the longitudinal elastic modulus. The surface 710 of the tip 700 includes a first main surface 711, a second main surface 712, a side surface 713, a bottom surface 714, and a contact surface 720. One of the first main surface 711 and the second main surface 712 corresponds to the front surface of the tip portion 700. The other of the first main surface 711 and the second main surface 712 corresponds to the back surface of the tip portion 700. In one example, the first main surface 711 corresponds to the front surface of the tip portion 700. The second main surface 712 corresponds to the back surface of the tip portion 700. The first main surface 711 is located in front of the second main surface 712 in a predetermined scanning direction. The contact surface 720 corresponds to the upper surface of the tip portion 700. The bottom surface 714 is included in the joint 510.

The contact surface 720 processes the workpiece W. The contact surface 720 is configured to have high wear resistance. The portion of the tip 700 including the contact surface 720 is a diamond sintered body. The contact surface 720 is made of a diamond sintered body. The contact surface 720 is flat. In the side view of the scraper 500, the contact surface 720 is inclined with respect to the first reference direction. The contact surface 720 includes a first side 720A, a second side 720B, and a top 720C parallel to the second reference direction. The first side 720A corresponds to the boundary between the contact surface 720 and the first main surface 711. The second side 720B corresponds to the boundary between the contact surface 720 and the second main surface 712. The contact surface 720 is provided between the top 720C and the first side 720A, and between the top 720C and the second side 720B, respectively. The contact surface 720 is inclined from the first side 720A or the second side 720B toward the top 720C.

The height of the scraper 500 is the length of the scraper 500 with respect to the first reference direction. The width of the scraper 500 is the length of the scraper 500 with respect to the second reference direction. The thickness of the scraper 500 is the length of the scraper 500 with respect to the third reference direction. In one example, the height of the scraper 500 is the distance between the bottom surface 635 of the main body 600 and the top 720C of the contact surface 720. The width of the scraper 500 is the distance between one side surface 633 of the main body 600 and the other side surface 633, or the distance between one side surface 713 of the tip portion 700 and the other side surface 713. The thickness of the scraper 500 is the distance between the first main surface 631 and the second main surface 632 of the main body 600, or the distance between the first main surface 711 and the second main surface 712 of the tip portion 700. In one example, the thickness of the main body 600 is equal to the thickness of the tip 700.

The relationship between the height of the scraper 500 and the width of the scraper 500 will be illustrated. In the first example, the height of the scraper 500 is shorter than the width of the scraper 500. In the second example, the height of the scraper 500 is longer than the width of the scraper 500. In the third example, the height of the scraper 500 and the width of the scraper 500 are equal. The relationship between the dimensions of the main body 600 and the dimensions of the tip 700 will be illustrated. The height of the main body 600 is higher than the height of the tip 700. The width of the main body 600 and the width of the tip 700 are equal. The thickness of the main body 600 is equal to the thickness of the tip 700.

The chuck device 40 includes an arrangement portion 41 and a reference surface 42. The arranging portion 41 includes a first arranging surface 41A and a second arranging surface 41B arranged in the width direction of the scraper processing apparatus 10B at intervals. An arrangement space 41C in which the first main body portion 610 is arranged is formed between the first arrangement surface 41A and the second arrangement surface 41B. The reference surface 42 faces the direction in which the workpiece W is arranged.

The first main body portion 610 is arranged in the arrangement space 41C. The first main body portion 610 is sandwiched between the arrangement portions 41. The first arrangement surface 41A is pressed against the first main surface 631 of the first main body 610, and the second arrangement surface 41B is pressed against the second main surface 632 of the first main body 610. The second main body portion 620 projects in the height direction of the scraper processing device 10B with respect to the reference surface 42 of the chuck device 40.

When the workpiece W is processed by the scraper processing apparatus 10B, the scraper 500 moves in a predetermined scanning direction with respect to the workpiece W. The scraper 500 and the workpiece W move relatively. With the relative movement of the scraper 500 and the workpiece W, a load is applied to the tip 700 of the scraper 500 during use. The in-use load applied to the tip portion 700 is transmitted to the main body portion 600.

The scraper 500 includes a deformation control unit 640 that promotes bending of the main body unit 600 due to a load during use. The deformation control unit 640 promotes the bending of the main body 600 so that the generation of local stress at the tip 700 is suppressed. With the bending of the main body 600, the load during use is received in a wide range of the main body 600, and the generation of local stress at the tip 700 is suppressed. This contributes to suppressing wear of the tip portion 700.

The deformation control unit 640 includes at least one of the first control unit 641 and the second control unit 642. In the example shown in FIG. 9, the deformation control unit 640 includes a first control unit 641 and a second control unit 642. The first control unit 641 and the second control unit 642 are configured to promote the bending of the main body unit 600 by different methods.

The first control unit 641 is configured to promote the bending of the main body 600 by setting the length of the second main body 620. The first control unit 641 includes a second main body unit 620 having a length equal to or longer than the reference length. The reference length is determined so as to appropriately promote the bending of the main body 600. The reference length is determined according to, for example, the material of the main body 600, the cross-sectional shape of the main body 600, and one or more of the magnitudes of the load during use. The height HB of the second main body portion 620 is the distance between the portion of the main body portion 600 corresponding to the reference surface 22 of the support portion 20 and the upper surface 634 of the main body portion 600. The height HB of the second main body portion 620 corresponds to the length of the main body portion 600 protruding in the first reference direction with respect to the reference surface 22 of the support portion 20.

The second control unit 642 is configured to promote the bending of the main body 600 by a partial change in the cross-sectional shape of the second main body 620. The second control unit 642 includes, for example, at least one of a recess, a penetration, and a hollow. The recess is configured to open to the surface of the second main body 620. The penetrating portion is configured to define a space penetrating the second main body portion 620. The hollow portion is formed inside the second main body portion 620.

In the example shown in FIG. 9, the second control unit 642 includes a recess 621 provided in the second main body unit 620. The configuration of the recess 621 will be illustrated. In the first example, the recess 621 includes one or more grooves that are long in a predetermined direction. The predetermined direction is, for example, the width direction of the scraper 500 or the direction intersecting the width direction of the scraper 500. In the second example, the recess 621 includes one or more recesses having an isotropic shape as compared to the groove. The plurality of recesses are arranged in a predetermined direction, for example. The predetermined direction is, for example, the width direction of the scraper 500 or the direction intersecting the width direction of the scraper 500. In the third example, the recess 621 includes the configurations of the first and second examples.

An example will be given of a portion where the recess 621 is formed in the second main body portion 620. In the first example, the recess 621 is provided on the first main surface 631. In the second example, the recess 621 is provided on the second main surface 632. In the third example, the recess 621 is provided on each of the first main surface 631 and the second main surface 632.

The position of the recess 621 with respect to the height direction of the scraper 500 will be illustrated. In the first example, the recess 621 is provided in a portion of the second main body portion 620 including a portion adjacent to the first main body portion 610. In the second example, the recess 621 is provided in a portion of the second main body portion 620 including a portion adjacent to the joint portion 510. In the third example, the recess 621 is provided between the position of the first example and the position of the second example.

The recess 621 of the first example shown in FIG. 9 includes a groove 622 that is long in the width direction of the scraper 500. The groove 622 is provided on the second main surface 632. The groove 622 is recessed toward the first main surface 631 with respect to the second main surface 632. The groove 622 opens to the second main surface 632. The length of the groove 622 in the width direction of the scraper 500 is referred to as the length of the groove 622. The length of the groove 622 in the height direction of the scraper 500 is referred to as the width of the groove 622. The length of the groove 622 in the thickness direction of the scraper 500 is referred to as the depth of the groove 622.

The length of the groove 622 will be illustrated. In the first example, the length of the groove 622 is equal to the width of the main body 600. The groove 622 opens on the side surface 633 of the main body 600. In the second example, the length of the groove 622 is shorter than the width of the main body 600 and longer than the height of the main body 600. In the third example, the length of the groove 622 is shorter than the width of the main body 600 and shorter than the height of the main body 600. In the fourth example, the length of the groove 622 is shorter than the width of the main body 600 and is equal to the height of the main body 600.

The width of the groove 622 will be illustrated. In the first example, the width of the groove 622 is longer than the height of the tip 700. In the second example, the width of the groove 622 is shorter than the height of the tip 700. In the third example, the width of the groove 622 is equal to the height of the tip 700. In the fourth example, the width of the groove 622 is longer than the height of the first main body portion 610. In the fifth example, the width of the groove 622 is shorter than the height of the first main body portion 610. In the sixth example, the width of the groove 622 is equal to the height of the first main body 610.

In one example, the width setting form, which is the width setting form of the groove 622 with respect to the longitudinal direction of the groove 622, may take the same width setting form as the width setting form of the second embodiment. The configuration of the groove 622 in relation to the width setting form may have the same configuration as the configuration of the groove 322 in relation to the width setting form of the second embodiment.

The depth of the groove 622 will be illustrated. In the first example, the depth of the groove 622 is shallower than half the thickness of the first main body 610. In the second example, the depth of the groove 622 is equal to half the thickness of the first main body 610. In the third example, the depth of the groove 622 is deeper than half the thickness of the first main body portion 610.

In one example, the depth setting form, which is the setting form of the depth of the groove 622 in the longitudinal direction of the groove 622, can take the same depth setting form as the depth setting form of the second embodiment. The configuration of the groove 622 in relation to the depth setting embodiment may have the same configuration as the configuration of the groove 322 in relation to the depth setting embodiment of the second embodiment.

When the workpiece W is processed, a load is applied to the tip 700 of the scraper 500 during use, and stress is generated at the tip 700. The stress distribution of the tip portion 700 is different between the scraper 500 including the deformation control unit 640 and the scraper not including the deformation control unit 640 (hereinafter referred to as “non-control scraper”). The configuration of the uncontrolled scraper is different from the scraper 500 in the following points, and has the same configuration as the scraper 500 in other respects. The same reference numerals are given to the elements common to each blade. The height of the second main body 620 of the uncontrolled scraper is substantially zero. That is, the main body 600 of the non-control scraper does not include the second main body 620. The joint portion 510 of the non-control scraper joins the first main body portion 610 and the tip portion 700. When the non-control scraper is fixed to the chuck device 40, only the tip portion 700 protrudes from the reference surface 42 of the chuck device 40.

The stress distribution of the tip 700 of the uncontrolled scraper during machining of the workpiece W conforms to the stress distribution of the tip 400 of the uncontrolled blade in the second embodiment. In the uncontrolled scraper, stress is concentratedly distributed on a part of the contact surface 720. The stress distribution of the tip 700 of the scraper 500 during machining of the workpiece W conforms to the stress distribution of the tip 400 of the blade 200 in the second embodiment. In the scraper 500, stress is generated over substantially the entire contact surface 720, and it is difficult for the stress to concentrate on a part of the contact surface 720. This contributes to suppressing wear of the tip portion 700.

It should be noted that the description of each of the above embodiments is not intended to limit the forms that the jig and tool according to the present invention can take. The jig and tool according to the present invention may take a form different from the form exemplified in each embodiment. One example thereof is a form in which a part of the configuration of the embodiment is replaced, changed, or omitted, or a new configuration is added to the embodiment.

10A: Centerless grinding device 100: Jig tool 100A: Jig 200: Blade 300: Main body 310: First main body 320: Second main body 321: Recess 340: Deformation control unit 400: Tip W: Work piece

Claims (12)

The tip that comes into contact with the work piece,
The main body that supports the tip and
A jig and tool provided with a deformation control unit that promotes bending of the main body portion due to a load applied to the tip portion. The main body portion includes a first main body portion fixed to a support portion that supports the main body portion, and a second main body portion provided between the first main body portion and the tip portion.
The jig and tool according to claim 1, wherein the deformation control unit is configured to promote bending of the second main body unit. The jig and tool according to claim 2, wherein the deformation control unit includes a first control unit that promotes bending of the second main body portion by setting the length of the second main body portion. The jig and tool according to claim 3, wherein the first control unit includes the second main body portion that is longer than the first main body portion. The jig or tool according to any one of claims 2 to 4, wherein the deformation control unit includes a second control unit that promotes bending of the second main body portion by partially changing the cross-sectional shape of the second main body portion. .. The jig and tool according to claim 5, wherein the second control unit includes a recess provided in the second main body. The jig and tool according to claim 6, wherein the recess is formed along a second reference direction orthogonal to the first reference direction in which the main body and the tip are aligned. The jig or tool according to any one of claims 1 to 7, wherein the tip portion includes a sintered body. The jig and tool according to any one of claims 1 to 8, wherein the elastic modulus of the tip portion is larger than the elastic modulus of the main body portion. The jig and tool according to any one of claims 1 to 9, wherein the jig and tool include a jig. The jig according to claim 10, wherein the jig includes a thin plate. The jig according to claim 10 or 11, wherein the jig includes a blade of a centerless grinding device.

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