JP7356185B2 - Processing grindstone and core drill - Google Patents

Description

The present invention relates to a processing grindstone and a core drill.

For example, in the grindstone described in Patent Document 1, a mesh-like sheet is embedded inside an abrasive grain-containing layer.

Japanese Patent Application Publication No. 2000-153464

In the grindstone described in Patent Document 1, it was desired that the abrasive grain-containing layer be more firmly fixed to the mesh sheet.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a machining grindstone and a core drill that can firmly fix the machining part with a mesh material.

In order to achieve the above object, a processing grindstone according to a first aspect of the present invention is a processing grindstone including a plurality of processing sheets arranged in a rotation direction, and each of the plurality of processing sheets is , comprising a processing section for processing an object to be processed, and a sheet-like mesh material having a folded section, at least a part of the folded section of the mesh material is embedded in the processing section , and the mesh material includes: The processing sheet includes a connecting portion that connects the plurality of bent portions, the processing sheet includes a filler in which the connecting portion is embedded, and the processing portions of two processing sheets adjacent in the rotation direction are mutually connected. It is provided at a position shifted in the direction along the rotation axis of the processing grindstone.

In order to achieve the above object, a processing grindstone according to a second aspect of the present invention is a processing grindstone including a plurality of processing sheets arranged in the rotation direction, and each of the plurality of processing sheets is , comprising a processing section for processing an object to be processed, and a sheet-like mesh material having a folded section, at least a part of the folded section of the mesh material is embedded in the processing section, and the mesh material includes: The processing sheet includes a connecting portion that connects the plurality of bent portions, the processing sheet includes a filler in which the connecting portion is embedded, and the processing portions of two processing sheets adjacent in the rotation direction are mutually connected. It is provided at a position shifted in the radial direction of the processing grindstone.

Further, the plurality of bent portions may be arranged at intervals on the mesh material, each having a wave shape, and each bent portion may be embedded in the processed portion.

Further, the bent portion may have a wave shape, and the processed portion may fill a depression in the bent portion .

Further, the mesh material is made of metal that can be plastically deformed, and the processed portion includes a metal binding material in which the bent portion is embedded and adhered to the bent portion, and a metal binding material in the binding material. A plurality of abrasive grains are positioned and used to process the workpiece .

In order to achieve the above object, a core drill according to a third aspect of the present invention is a core drill including a processing sheet, wherein the processing sheet is shaped like a sheet having a processing section for processing a processing object and a bending section. a mesh material, at least a portion of the bent portion of the mesh material is embedded in the processing portion, and the mesh material includes a connecting portion that connects the plurality of bent portions, The sheet includes a filler in which the connecting portion is embedded, the mesh material is formed in a cylindrical shape, and the plurality of processed portions are arranged along the circumferential direction of the mesh material.

Further, the plurality of bent portions may be arranged at intervals on the mesh material, each having a wave shape, and each bent portion may be embedded in the processed portion.

Further, the bent portion may have a wave shape, and the processed portion may fill a depression in the bent portion.

Further, the mesh material is made of metal that can be plastically deformed, and the processed portion includes a metal binding material in which the bent portion is embedded and adhered to the bent portion, and a metal binding material in the binding material. A plurality of abrasive grains are positioned and used to process the workpiece.

According to the present invention, the processed portion can be firmly fixed with the mesh material.

FIG. 1 is a plan view of a processing sheet according to a first embodiment of the present invention. 2 is a sectional view taken along line 1-1 in FIG. 1. FIG. FIG. 3 is a plan view of a grindstone according to a second embodiment of the present invention. 4 is an enlarged view of a part of FIG. 3. FIG. 5 is a sectional view taken along line 5-5 in FIG. 4. FIG. FIG. 7 is a plan view of a grindstone according to a third embodiment of the present invention. It is a side view of the grindstone based on the 3rd Embodiment of this invention, and the figure which expanded the part. It is a top view of the grindstone concerning the 4th embodiment of the present invention, and a partially enlarged view. It is a perspective view of the whetstone concerning the modification of the 4th embodiment of the present invention, and a partially enlarged view. 9 is a sectional view taken along line JJ in FIG. 9. FIG. It is a top view of the pillar member for processing based on the 5th Embodiment of this invention, and a partially enlarged view. FIG. 7 is a partial perspective view of a grindstone according to a fifth embodiment of the present invention. It is a bottom view of the core drill concerning the 6th embodiment of the present invention. It is a side view of the core drill concerning the 6th embodiment of the present invention. 15 is a sectional view taken along line KK in FIG. 14. FIG. It is a sectional view of the sheet for processing concerning the modification of the present invention. It is a sectional view of the sheet for processing concerning the modification of the present invention.

(First embodiment)
A processing sheet according to a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the processing sheet 10 includes a fibrous mesh material 11 and a plurality of processing parts 15 fixed to the mesh material 11. The processing sheet 10 has a sheet shape extending in the X direction and the Y direction.

In this example, the mesh material 11 is made of metal, for example, stainless steel fiber, and serves as the core material of the processing sheet 10. The mesh material 11 is flexible and has a sheet shape that can be plastically deformed with a tool such as pliers.
The mesh material 11 may be made of metal other than stainless steel, such as copper (for example, brass), nickel, or aluminum, or may be made of glass, nonwoven fabric, woven fabric, carbon fiber, or the like other than metal. Good too.
A large number of holes are formed in the mesh material 11 so as to pass through the mesh material 11 in its thickness direction. The ratio of the wire volume of the mesh material 11 that does not include spaces (holes) to the total volume of the mesh material 11 that includes spaces (holes) is 10% or less. The mesh number of the mesh material 11 is preferably #10 to #500, for example. Mesh count is expressed as the number of meshes per inch of length. If the number of meshes in the mesh material 11 is too large, the mesh becomes too fine, making it difficult for the binding material 13 (described later) of the processed portion 15 to penetrate into the mesh material 11, and making it difficult for the processed portion 15 to be firmly fixed to the mesh material 11. Become. On the other hand, if the number of meshes in the mesh material 11 is too small, the mesh will become coarse and the number of linear parts constituting the mesh material 11 to which the processed portion 15 is fixed will decrease, resulting in the processed portion 15 being firmly attached to the mesh material 11. becomes difficult to be fixed. From this point of view, the number of meshes is preferably set to #10 to #500.

As shown in FIG. 2, the mesh material 11 is bent into a rectangular (trapezoidal in this example) wave shape. The mesh material 11 includes a plurality of bent portions 12 and a plurality of connecting portions 11R that connect the plurality of bent portions 12. The bent portions 12 are located corresponding to the rectangular wave convex portions formed by the mesh material 11. The plurality of bent portions 12 are arranged along the X direction. Each bent portion 12 has a hat shape when viewed from the Y direction. Each bent portion 12 is embedded in a processed portion 15, respectively. The bent portion 12 can be formed by sandwiching the flat mesh material 11 between pliers or gears.

The plurality of processing sections 15 have a columnar shape (in this example, a trapezoidal columnar shape) extending along the Y direction corresponding to the bending section 12, and perform processing such as polishing or grinding on the workpiece. Each processed portion 15 includes an inner portion 15i that fills the hollow of the bent portion 12, and an outer portion 15o located outside the bent portion 12. The inner part 15i and the outer part 15o are integrated through holes in the mesh material 11. The processed portion 15 is formed by plating the mesh material 11 with a metal material such as nickel or copper containing a plurality of abrasive grains 14 .
Note that the shape of the plurality of processed parts 15 is not limited to this, and may be formed by being divided in the Y direction.

As shown in an enlarged view at the bottom of FIG. 2, the processing section 15 includes a plurality of abrasive grains 14 for processing a workpiece, and a binding material 13 for bonding the plurality of abrasive grains 14. A plurality of abrasive grains 14 are distributed within the bonding material 13. The abrasive grains 14 are, for example, diamond. Note that the abrasive grains 14 are not limited to diamond, but may be cubic boron nitride (CBN) abrasive grains, or may be a mixture of CBN abrasive grains and diamond. Furthermore, the plurality of abrasive grains 14 may be silicon carbide (SiC), fused alumina (Al ₂ O ₃ ), or a mixture thereof. The bonding material 13 holds a plurality of abrasive grains 14 inside the bonding material 13 . The binding material 13 is made of, for example, nickel. The bent portion 12 and the binding material 13 are in a state of being adhered. The binding material 13 is located on both sides of the bent portion 12 in the thickness direction and in the hole inside the bent portion 12 . The binding material 13 enters the hole inside the bent portion 12 and is fixed to the mesh material 11 by an anchor effect. Even if the abrasive grains 14 fall off during processing of the workpiece using the processing sheet 10, the bonding material 13 is scraped and new abrasive grains 14 are exposed. This suppresses a decrease in the sharpness of the processing sheet 10.
The binding material 13 is not limited to nickel, but may also be made of metals such as iron, aluminum, copper, aluminum alloys, alloys such as bronze, resins such as phenol resins and epoxy resins, or ceramics such as vitrified. good.

In this embodiment, the mesh material 11 is exposed to the outside between the plurality of processed parts 15, but the invention is not limited to this, and as shown by the broken line in FIG. 18 may be formed. The mesh material 11 is embedded in the filler 18 . The filler 18 is fixed to the mesh material 11 by entering the holes inside the mesh material 11. The thickness of the filler 18 is thinner than that of the processed portion 15. The filler 18, like the binding material 13, is made of resin such as phenol resin or epoxy resin, metal, or alloy. The filler 18 may be mixed with sharpening grains such as alumina (not shown) that sharpen the abrasive grains 14 . The filler 18 gives the entire processing sheet 10 appropriate hardness. The processing sheet 10 is used for processing grindstones 210, 310, 410, 510, 610 and a core drill 710, which will be described later.

(effect)
According to the first embodiment and its modification described above, the following effects are achieved.
(1) The processing sheet 10 includes a processing section 15 for processing a processing object (work), and a sheet-like mesh material 11 having a bent section 12. A bent portion 12 of the mesh material 11 is embedded in the processed portion 15 .
According to this configuration, the contact area between the processed portion 15 and the mesh material 11 is increased by the bent portion 12, and the processed portion 15 can be more firmly fixed to the mesh material 11.
Furthermore, the thickness of the processed portion 15 can be easily adjusted by the bent portion 12.
Further, by exposing the mesh material 11 between the plurality of processing parts 15, the processing sheet 10 has high flexibility and can be easily bent to match the shape of the workpiece.

(2) The bent portion 12 has a wave shape. The processed portion 15 is filled in the depression of the bent portion 12.
According to this configuration, the processed portion 15 can be firmly fixed by the mesh material 11.

(3) The mesh material 11 is made of plastically deformable metal (for example, stainless steel). The processing section 15 includes a metal (for example, nickel) binding material 13 that adheres to the mesh material 11, and a plurality of abrasive grains 14 that are located within the binding material 13 and process the workpiece.
According to this configuration, the processed portion 15 can be firmly fixed by the mesh material 11.

(Second embodiment)
A processing sheet and a processing grindstone according to a second embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 3, the processing grindstone 210 has a disk shape and cuts a workpiece etc. on the outer peripheral side. The processing grindstone 210 is, for example, a dicing blade. For example, the processing grindstone 210 includes a plurality of processing parts 215 made of the same material as the processing part 15 of the first embodiment, and a filler material made of the same material as the filler material 18 of the modified example of the first embodiment. 218, and a mesh material 211 (see FIG. 5) made of the same material as the mesh material 11 of the first embodiment.

As shown in FIG. 3, the plurality of processing parts 215 are located on the outer peripheral side of the processing grindstone 210, and are arranged at positions separated from each other in the rotation direction C of the processing grindstone 210. The plurality of processed parts 215 are arranged at equal angular intervals. Each processing portion 215 has a long shape in the radial direction R of the processing grindstone 210, and has a rectangular shape in this example. As shown in FIG. 5, the processing section 215 includes a plurality of abrasive grains 14 and a bonding material 13, similar to the first embodiment.

The mesh material 211 is formed into a circular sheet shape as a core material of the processing grindstone 210.
As shown in FIGS. 4 and 5, the mesh material 211 includes a plurality of bent parts 212 and a plurality of connecting parts 211R that connect the plurality of bent parts 212. The plurality of bent portions 212 are located on the outer peripheral side of the mesh material 211 and are arranged at positions separated from each other in the rotation direction C of the processing grindstone 210.
As shown in FIG. 5, the bent portion 212 is formed as a wrinkle in a triangular wave shape along the rotation direction C. Each bent portion 212 is embedded in each processed portion 215. The binding material 13 of the processed portion 215 has penetrated into the holes inside the mesh material 211 . By adjusting the amplitude of the waveform of each bent portion 212, the thickness of the processed portion 215 can be adjusted.

The filler 218 is filled in the connecting portion 211R located between the plurality of processed portions 215, and is formed on both sides of the connecting portion 211R in the thickness direction and in the hole inside the connecting portion 211R. The filler 218 is formed thinner than the processed portion 215.

(effect)
According to the second embodiment described above, the following effects are achieved.
(1) The plurality of bent portions 212 are arranged at intervals on the mesh material 211, each having a wave shape, and each bent portion 212 is embedded in the processed portion 215.
According to this configuration, the contact area between the processed portion 215 and the mesh material 211 is increased by the bent portion 212, and the processed portion 215 can be more firmly fixed to the mesh material 211.

(2) The processing grindstone 210 includes a processing sheet including a mesh material 211 having a plurality of folded portions 212, a processing portion 215, and a filler 218. The plurality of processing parts 215 are located on the outer circumferential side of the disk-shaped processing grindstone 210, and are arranged at positions separated from each other in the rotation direction C of the processing grindstone 210.
According to this configuration, since the processing portion 215 periodically contacts the workpiece in the rotation direction C of the processing grindstone 210 during processing, the sharpness of the processing grindstone 210 is improved.
Further, even when cutting a metal workpiece, the processing grindstone 210 is difficult to generate sparks because the filler 218 other than the processing portion 215 periodically contacts the workpiece.
Furthermore, since the processed portion 215 is formed only on the outer peripheral side of the processing grindstone 210, the area in which the processed portion 215 is formed can be minimized. Thereby, the amount of abrasive grains contained in the processing section 215 can be reduced.
Further, by making the filler 218 of a material softer than the processing portion 215, for example, resin, it is possible to soften the contact of the processing grindstone 210 with the workpiece. Thereby, vibration of the processing grindstone 210 during processing can be suppressed.
Further, since the processed portion 215 is formed using the fibrous mesh material 211 as a base material, a rigid base material is not required. Therefore, the processing grindstone 210 can be made thinner, and the sharpness of the processing grindstone 210 is improved.

(Third embodiment)
A processing sheet and a processing grindstone according to a third embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 6 and 7, the processing grindstone 310 is a cylindrical flap grindstone that performs processing on its outer peripheral surface. The processing grindstone 310 includes a plurality of processing sheets 301 and a buffer material 319 formed between the plurality of processing sheets 301. The plurality of processing sheets 301 extend in the radial direction R of the processing grindstone 310, and are arranged with gaps in the rotation direction C of the processing grindstone 310.

As shown in FIG. 7, the processing sheet 301 includes a plurality of processing parts 315 made of the same material as the processing part 15 of the first embodiment, and a plurality of processing parts 315 made of the same material as the mesh material 11 of the first embodiment. It includes a mesh material 311 and a filler 318 made of the same material as the filler 18 of the first embodiment. The processing sheet 301 has a rectangular plate shape. The plurality of processing portions 315 are each formed to extend along the radial direction R and reach the outer end of the processing sheet 301 in the radial direction R. The plurality of processing parts 315 are arranged in a direction along the rotation axis O of the processing grindstone 310, which is orthogonal to the radial direction R. The fillers 318 are formed between the plurality of processed parts 315 in the mesh material 311, extend along the radial direction R, and are arranged in the direction along the rotation axis O. As shown enlarged on the left side of FIG. 7, the mesh material 311 has a rectangular wave shape extending along the rotation axis O. The mesh material 311 includes a plurality of bent portions 312 corresponding to the convex portions of the rectangular wave, and a connecting portion 311R that connects the plurality of bent portions 312. Each bent portion 312 is embedded in a processed portion 315, respectively. The connecting portion 311R is embedded in the filler 318. The processed portion 315 and the filler 318 are formed into a flat plate shape with substantially the same thickness.

As shown in FIG. 7, the plurality of processing sheets 301 include processing sheets 301a and 301b. The two processing sheets 301a and 301b are arranged alternately over the entire circumference in the rotation direction C. The plurality of processing parts 315 of the two processing sheets 301a and 301b adjacent in the rotation direction C are provided at positions shifted in the direction along the rotation axis O of the processing grindstone 310 so as to reduce the overlapping area in the rotation direction C. It is being The plurality of processing parts 315 of the processing sheet 301a are located opposite to the plurality of fillers 318 of the processing sheet 301b in the rotation direction C, and the plurality of processing parts 315 of the processing sheet 301b are located opposite to the plurality of filling materials 318 of the processing sheet 301b. The filling material 318 is located opposite to the rotational direction C. In other words, the phase of the arrangement cycle of the plurality of processing parts 315 of the processing sheet 301a and the phase of the arrangement cycle of the plurality of processing parts 315 of the processing sheet 301b are at a predetermined angle in the direction along the rotation axis O of the processing grindstone 310, For example, they are arranged so as to be shifted by 180°.

In the present embodiment, each processed portion 315 is formed over the entire area of the processing sheet 301 in the radial direction R, but the invention is not limited to this. A portion far from the substrate may be omitted, and the filler 318 may be formed in this omitted portion. According to this configuration, the formation range of the processed portion 315 can be minimized.
Furthermore, in this embodiment, the cushioning material 319 may be omitted.

(effect)
According to the third embodiment and its modification described above, the following effects are achieved.
The processing grindstone 310 includes a plurality of processing sheets 301a and 301b arranged in the rotation direction C of the processing grindstone 310. The processing portions 315 of the two processing sheets 301a and 301b adjacent in the rotation direction C are provided at positions shifted from each other in the direction along the rotation axis O of the processing grindstone 310.
According to this configuration, the contact area between the processed portion 315 and the mesh material 311 is increased by the bent portion 312, and the processed portion 315 can be more firmly fixed to the mesh material 311.
Moreover, according to this configuration, it is possible to reduce unevenness in machining the workpiece by the machining grindstone 310. Furthermore, the processing pressure of the workpiece by the processing section 315 is increased, and the sharpness of the processing grindstone 310 can be improved.
Furthermore, by forming the filler 318 from a material softer than the processing portion 315, such as resin, the contact of the processing grindstone 310 with the workpiece can be made softer, and it can be elastically deformed to follow the uneven shape of the workpiece. It becomes possible. Further, vibration of the processing grindstone 310 during processing can be suppressed.

(Fourth embodiment)
A processing sheet and a processing grindstone according to a fourth embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 8, the processing grindstone 410 of this embodiment is a bottom processing grindstone that performs processing on the bottom surface. The processing grindstone 410 includes a plurality of processing sheets 401 and a cushioning material 419 formed between the plurality of processing sheets 401, similarly to the processing grindstone 310 of the third embodiment.

As shown in an enlarged view at the lower left of FIG. 8, the processing sheet 401 includes a mesh material 411 having a plurality of folded portions 412 and a plurality of connection portions 411R, similar to the processing sheet 301 of the third embodiment. It includes a processing section 415 and a filler 418. The processed portions 415 and the fillers 418 are arranged alternately in the radial direction R. The plurality of processing sheets 401 include processing sheets 401a and 401b. The two processing sheets 401a and 401b are arranged alternately over the entire circumference in the rotation direction C. The plurality of processing portions 415 of the two processing sheets 401a and 401b adjacent in the rotational direction C are provided at positions shifted in the radial direction R so as not to overlap in the rotational direction C. The plurality of processing parts 415 of the processing sheet 401a are located opposite to the plurality of fillers 418 of the processing sheet 401b in the rotation direction C, and the plurality of processing parts 415 of the processing sheet 401b are located opposite to the plurality of filling materials 418 of the processing sheet 401b. The filler 418 is located opposite to the rotation direction C. In other words, the arrangement is such that the phase of the arrangement period of the plurality of processed parts 415 on the processing sheet 401a and the phase of the arrangement period of the plurality of processing parts 415 on the processing sheet 401b are shifted by a predetermined angle, for example, 180 degrees, in the radial direction R. be done.
The processing portion 415 may be formed over the entire area of the processing sheet 401 in the direction along the rotation axis O, or may be formed only near the bottom surface which is the processing surface of the processing grindstone 410 in the direction along the rotation axis O. may be done.

Although the processing grindstone 410 of the present embodiment includes the buffer material 419, the present invention is not limited to this, and the buffer material 419 may be omitted. In this case, a plurality of processing sheets 401 may be arranged so as to overlap along the rotation direction C. For example, as shown in FIG. 9, a processing grindstone 510 that is a tapered multi-blade disc performs processing on the bottom surface similarly to the processing grindstone 410. The processing grindstone 510 includes a disk-shaped base material 517 and a plurality of processing sheets 501 arranged on the surface of the base material 517 in the rotation direction C so that some of them overlap with each other. As shown in FIG. 10, the processing sheet 501 includes a mesh material 511, a processing section 515, and a filler 518, similarly to the processing sheet 401 described above. The processing sheet 501 has a rectangular plate shape long in the radial direction R, and is inclined with respect to the surface of the base material 517.

As shown in FIG. 10, the mesh material 511 includes a plurality of bent portions 512 corresponding to the convex portions of the rectangular wave, and a connecting portion 511R that connects the plurality of bent portions 512. Each bent portion 512 is embedded in a processed portion 515, respectively. The connecting portion 511R is embedded in the filler 518.

As shown in the enlarged view below in FIG. 9, the plurality of processed parts 515 of the processed sheet 501 are formed at positions separated from each other in the radial direction R. The plurality of processing sheets 501 include processing sheets 501a and 501b. The two processing sheets 501a and 501b are arranged alternately over the entire circumference in the rotation direction C. A plurality of processing portions 515 of two processing sheets 501a and 501b adjacent in the rotational direction C are provided at positions shifted in the radial direction R so as not to overlap in the rotational direction C. The plurality of processing parts 515 of the processing sheet 501a are located opposite to the plurality of fillers 518 of the processing sheet 501b in the rotation direction C, and the plurality of processing parts 515 of the processing sheet 501b are located opposite to the plurality of filling materials 518 of the processing sheet 501b. The filling material 518 is located opposite to the rotational direction C. In other words, the arrangement is such that the phase of the arrangement period of the plurality of processing parts 515 on the processing sheet 501a and the phase of the arrangement period of the plurality of processing parts 515 on the processing sheet 501b are shifted by a predetermined angle, for example, 180 degrees, in the radial direction R. be done.

(effect)
According to the fourth embodiment and its modification described above, the following effects are achieved.
The processing grindstones 410, 510 include a plurality of processing sheets 401a, 401b, 501a, 501b arranged in the rotation direction C of the processing grindstones 410, 510. Processing portions 415, 515 of two processing sheets 401a, 401b, 501a, 501b adjacent in the rotation direction C are provided at positions shifted from each other in the radial direction R of the processing grindstones 410, 510.
According to this configuration, the contact area between the processed parts 415, 515 and the mesh material 411, 511 is increased by the bent parts 412, 512, and the processed parts 415, 515 can be firmly fixed by the mesh material 411, 511. .
Moreover, according to this configuration, it is possible to reduce unevenness in machining of the workpiece by the machining grindstones 410 and 510. Moreover, the processing pressure of the workpiece by the processing portions 415, 515 increases, and the sharpness of the processing grindstones 410, 510 can be improved.
Furthermore, by forming the fillers 418, 518 from a material softer than the processed parts 415, 515, such as resin, the contact of the processing grindstones 410, 510 to the workpiece can be made softer, and it can follow the uneven shape of the workpiece. It becomes elastically deformable. Furthermore, vibration of the processing grindstones 410, 510 during processing can be suppressed.

(Fifth embodiment)
A processing sheet, a processing grindstone, and a processing column member according to a fifth embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 12, the processing grindstone 610 cuts the workpiece at its outer peripheral surface. This work also includes grass. The processing grindstone 610 includes a plurality of processing column members 630 and a pedestal 617 to which the plurality of processing column members 630 are fixed. The pedestal 617 has a disk shape. The processing column member 630 is fixed to the outer peripheral surface of the pedestal 617.

As shown in FIG. 11, the processing column member 630 includes a plurality of processing parts 615 made of the same material as the processing part 215 of the second embodiment, and a plurality of processing parts 615 made of the same material as the mesh material 211 of the second embodiment. and a filler 618 made of the same material as the filler 218 of the second embodiment.
The processing column member 630 has a bent plate shape in which a plurality of flat plates are connected. In this example, the mesh material 611 that is the core material of the processing column member 630 has a hat shape. Each processing portion 615 is located on a flat plate portion other than the corner portion of the processing column member 630. The plurality of processing parts 615 are provided at positions separated from each other in the longitudinal direction of the processing column member 630. The processing portion 615 is formed over the entire width of the processing column member 630 in the lateral direction. Note that the processing portion 615 is not limited to this example, and the processing portion 615 may be formed only on the side closer to the processing object (cutting object) in the width direction of the processing column member 630.

As shown in FIG. 11, the mesh material 611 has a plurality of bent portions 612. The plurality of bent portions 612 are arranged at positions apart in the rotation direction C of the processing grindstone 610.
As shown in the enlarged view below in FIG. 11, the bent portion 612 is formed as a triangular wave-like wrinkle along the rotation direction C. Each bent portion 612 is embedded in each processed portion 615. By adjusting the amplitude of the waveform of each bent portion 612, the thickness of the processed portion 615 can be adjusted.

As shown in FIG. 12, a cylindrical portion 635 is formed by combining two processing column members 630 such that the opening sides of the two processing column members 630 face each other. For example, both ends of the two processing column members 630 in the longitudinal direction are bonded together. A convex portion (not shown) formed on the outer peripheral surface of the pedestal 617 is fitted into the cylindrical portion 635 . Further, the inside of the cylindrical portion 635 may be formed so that coolant liquid or chips can pass therethrough. Although the cylindrical portion 635 has a hexagonal cylindrical shape in this example, it is not limited thereto, and may have other polygonal cylindrical shapes or cylindrical shapes.

The shape of the processing column member 630 in this embodiment can be changed as appropriate. For example, the processing column member 630 may have a V-shape, L-shape, or F-shape, and each processing portion 615 may be provided on a flat plate portion that is a non-corner portion. Furthermore, the processing column member may be singly cylindrical.
Further, the processing column member 630 may be used as a grindstone for processing on the bottom surface. In this case, the processing column member 630 may be provided in a direction intersecting the bottom surface of the grindstone, for example, in a direction perpendicular to the bottom surface of the grindstone. For example, this grindstone may be formed so that the cylindrical portions are lined up on the bottom surface.
Furthermore, the processing column member 630 may be used as a grindstone for processing the outer peripheral surface. In this case, the processing column member 630 may be provided in a direction intersecting the outer peripheral surface of the grindstone, for example, in a direction perpendicular to the outer peripheral surface of the grindstone. For example, this grindstone may be formed so that cylindrical parts are lined up on the outer peripheral surface.

(effect)
According to the fifth embodiment and its modification described above, the following effects are achieved.
The processing column member 630 includes a processing sheet including a processing section 615, a mesh material 611, and a filler 618. The processing column member 630 has a bent plate shape that stands upright in a direction intersecting the processing surface. Each processing portion 615 is provided at a portion of the processing column member 630 other than the corner portion.
According to this configuration, the contact area between the processed portion 615 and the mesh material 611 is increased by the bent portion 612, and the processed portion 615 can be more firmly fixed to the mesh material 611.
Furthermore, according to this configuration, the processing portion 615 is provided at a non-corner portion of the processing column member 630, thereby stabilizing the processing by the processing column member 630.
Furthermore, by using the filler 618 as a material softer than the processing portion 615, such as resin, it is possible to soften the contact of the processing column member 630 with the workpiece. In addition, since the filler 618 that is softer than the processed portion 615 is placed at the corner of the processing column member 630, the processing column member 630 can be easily deformed around the corner of the processing column member 630.
Furthermore, each of the processed parts 615 is formed to extend in a direction intersecting the processed surface, and is provided at positions separated from each other in the direction along the processed surface.
According to this configuration, the machining pressure of the machining section 615 against the workpiece is increased, and the sharpness of the machining column member 630 can be improved.

(Sixth embodiment)
A processing sheet and a core drill according to a sixth embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 13 and 14, the core drill 710, which is a processing grindstone, forms a hole in the workpiece by contacting the workpiece made of concrete or the like while being rotated about the rotation axis O. The core drill 710 has a plurality of processing parts 715 made of the same material as the processing part 15 of the first embodiment, and a filler 718 made of the same material as the filler 18 of the first embodiment, as shown in FIG. Thus, a mesh material 711 made of the same material as the mesh material 11 of the first embodiment is provided.

As shown in FIGS. 13 and 14, the filler 718 is formed in a cylindrical shape. A cylindrical mesh material 711 is embedded in the filler 718. The filler 718 holds the plurality of processed parts 715.

As shown in FIG. 15, the mesh material 711 is bent into a rectangular (trapezoidal in this example) wave shape along the rotation direction C. The mesh material 711 includes a plurality of bent portions 712 and a plurality of connecting portions 711R that connect the plurality of bent portions 712. The bent portions 712 and the connecting portions 711R are arranged alternately in the rotation direction C. The bent portion 712 is located corresponding to a convex portion of the mesh material 711 facing outward in the radial direction R. The connecting portion 711R is curved along the rotation direction C. Each bent portion 712 is embedded in the processed portion 15, respectively. The thickness of the processed portion 15 in the radial direction R is formed to be thicker than the thickness of the filler 718 in the radial direction R. The filler 718 is located so as to be in contact with the side surface of the processing portion 15 on the rotation axis O side (lower side in FIG. 15).
Note that the bent portion 712 may be formed in a triangular wave shape similarly to the above-described bent portions 212 and 612 (see FIGS. 5 and 11).

The filler 718 is made by, for example, brazing the mesh material 711 with silver solder or the like, thereby attaching the brazing material to the mesh material 711 and holding the processed portion 715 by solidifying the brazing material. Since the mesh material 711 is fibrous, it can hold the melted brazing material. Therefore, the mesh material 711 prevents the melted brazing material from flowing down, making it easier to manufacture the core drill 710.

As shown in FIG. 13, the processed parts 715 are arranged along the rotation direction C. As shown in FIG. 14, the processing portion 715 is located on the side of the core drill 710 closer to the workpiece, and has a shape elongated in the direction along the rotation axis O, for example, a rectangular shape.

(effect)
According to the sixth embodiment and its modification described above, the following effects are achieved.
(1) The core drill 710 includes a processing sheet, and this processing sheet includes a mesh material 711 having a plurality of folded portions 712, a plurality of processing portions 715, and a filler material 718. The mesh material 711 is formed into a cylindrical shape. The plurality of processed parts 715 are arranged along the rotation direction C, which is the circumferential direction of the mesh material 711.
According to this configuration, the contact area between the processed portion 715 and the mesh material 711 is increased by the bent portion 712, and the processed portion 715 can be more firmly fixed to the mesh material 711.
Further, according to this configuration, the core drill 710 can be formed thinner than a core drill to which a conventional tipped saw is attached, and the processing pressure on the workpiece can be increased, so that the sharpness of the core drill 710 can be improved. Further, noise, dust, and vibration generated when processing a workpiece with the core drill 710 can be reduced.

Note that the present disclosure is not limited to the above embodiments and drawings. It is possible to make changes (including deletion of components) as appropriate without changing the gist of the present disclosure. An example of the modification will be described below.

(Modified example)
For example, although the processing portion in each of the embodiments described above included a plurality of abrasive grains 14, the plurality of abrasive grains 14 may be omitted and the processing portion may be formed only from metal.

The shapes of the bent portions 12, 212, 312, 412, 512, 612, and 712 in each of the above embodiments can be changed as appropriate. For example, as shown in FIG. 16, the mesh material 811 of the processing sheet, grindstone, or core drill may have a sinusoidal shape. In this example, the bent portion 812 of the mesh material 811 is a concave portion around the minimum value of the sinusoidal mesh material 811. Each bent portion 812 is embedded in a substantially semi-cylindrical processed portion 815. Note that in this example, one processed portion 815 is provided for each period of the sinusoidal mesh material 811, but the invention is not limited to this, and one processed portion 815 may be provided for each plurality of periods (for example, one processed portion 815 for every two periods). may be provided.
For example, as shown in FIG. 17, in a processing sheet, a grindstone, or a mesh material of a core drill, a part (e.g., the upper surface part) of the rectangular wave-like bent part 912 is formed in a wave shape (e.g., triangular wave shape). You can leave it there. Further, the present invention is not limited to this, and the side surface portion of the bent portion 912 may be formed in a wave shape (for example, a triangular wave shape). Furthermore, the shape of any one of the bent portions 12, 212, 312, 412, 512, 612, 712, 812, and 912 may be applied to other bent portions other than this one.
Further, bent portions having mutually different shapes may be formed in one mesh material 11, 211, 311, 411, 511, 611, 711, 811.
Further, in each of the above embodiments, the mesh material 11, 211, 311, 411, 511, 611, 711, 811 is one layer, but may be a plurality of layers stacked on top of each other.
The connecting portions 11R, 211R, 311R, 411R, 511R, 611R, and 711R in each of the above embodiments may have a plurality of wavy or other bent portions, similar to the processed portions. Thereby, the fillers 18, 218, 318, 418, 518, 618, 718 are firmly fixed by the connecting portions 11R, 211R, 311R, 411R, 511R, 611R, 711R.

10, 301, 301a, 301b, 401, 401a, 401b, 501, 501a, 501b Processing sheet 11, 211, 311, 411, 511, 611, 711, 811 Mesh material 11R, 211R, 311R, 411R, 511R, 611R , 711R Connecting portion 12, 212, 312, 412, 512, 612, 712, 812, 912 Bend portion 13 Binding material 14 Abrasive grains 15, 215, 315, 415, 515, 615, 715, 815 Processing portion 15i Inner portion 15o Outer part 18, 218, 318, 418, 518, 618, 718, Filler 210, 310, 410, 510, 610 Processing grindstone 319, 419 Cushioning material 517 Base material 617 Pedestal 630 Processing column member 635 Cylindrical part 710 Core drill C Rotation direction O Rotation axis R Radial direction

Claims (9)

A processing grindstone including a plurality of processing sheets arranged in the rotation direction,
Each of the plurality of processing sheets is
a processing section that processes the processing object;
A sheet-like mesh material having a folded portion,
At least a portion of the bent portion of the mesh material is embedded in the processed portion,
The mesh material includes a connecting portion that connects the plurality of bent portions,
The processing sheet includes a filler in which the connecting portion is embedded,
The processing portions of the two processing sheets adjacent in the rotation direction are provided at positions shifted from each other in a direction along the rotation axis of the processing grindstone,
Grindstone for processing. A processing grindstone including a plurality of processing sheets arranged in the rotation direction,
Each of the plurality of processing sheets is
a processing section that processes the processing object;
A sheet-like mesh material having a folded portion,
At least a portion of the bent portion of the mesh material is embedded in the processed portion,
The mesh material includes a connecting portion that connects the plurality of bent portions,
The processing sheet includes a filler in which the connecting portion is embedded,
The processing portions of the two processing sheets adjacent in the rotation direction are provided at positions shifted from each other in the radial direction of the processing grindstone,
Grindstone for processing. The plurality of bent portions are arranged at intervals on the mesh material, each has a wave shape, and each is embedded in the processed portion,
A processing whetstone according to claim 1 or 2 . The bent portion has a wave shape,
The processed portion is filled in a recess of the bent portion.
A processing whetstone according to claim 1 or 2 . The mesh material is made of plastically deformable metal,
The processing section is
a metal binding material in which the bent portion is buried and adhered to the bent portion;
a plurality of abrasive grains located within the bonding material and processing the workpiece;
A processing grindstone according to any one of claims 1 to 4 . A core drill including a processing sheet,
The processing sheet is
a processing section that processes the processing object;
A sheet-like mesh material having a folded portion,
At least a portion of the bent portion of the mesh material is embedded in the processed portion,
The mesh material includes a connecting portion that connects the plurality of bent portions,
The processing sheet includes a filler in which the connecting portion is embedded,
The mesh material is formed in a cylindrical shape,
The plurality of processed parts are arranged along the circumferential direction of the mesh material,
core drill. The plurality of bent portions are arranged at intervals on the mesh material, each has a wave shape, and each is embedded in the processed portion,
The core drill according to claim 6 . The bent portion has a wave shape,
The processed portion is filled in a recess of the bent portion.
The core drill according to claim 6 . The mesh material is made of plastically deformable metal,
The processing section is
a metal binding material in which the bent portion is buried and adhered to the bent portion;
a plurality of abrasive grains located within the bonding material and processing the workpiece;
The core drill according to any one of claims 6 to 8 .