JP6045981B2 - Wheel manufacturing method and wheel manufacturing apparatus - Google Patents

Description

  The present invention relates to a grindstone manufacturing method and a grindstone manufacturing apparatus for manufacturing a grindstone in which a plurality of abrasive grains are arranged in parallel on a mounting surface of a base.

  Conventionally, a grindstone in which a plurality of abrasive grains are arranged in parallel on a mounting surface of a base is widely known as a tool for grinding a workpiece. This kind of grindstone is manufactured as follows, for example (for example, refer patent document 1).

  When manufacturing a grindstone, first, an abrasive positioning jig on which a base constituting the grindstone is mounted is immersed in a plating solution in a plating basket. At this time, the mounting surface of the base is inclined with respect to the horizontal direction. And each abrasive grain formed in the truncated octahedron is supplied to the mounting surface of a base. Then, each abrasive grain rolls on the inclined mounting surface, and one surface of each abrasive grain is positioned on the mounting surface while being in surface contact with the contact portion of the abrasive positioning jig. Thereby, a plurality of abrasive grains are arranged on the mounting surface of the base. Then, the said grindstone is manufactured by electrodepositing a some abrasive grain with respect to a base.

JP 2011-240471A

  In the prior art such as Patent Document 1 described above, each abrasive grain is positioned on the mounting surface of the base while bringing one surface thereof into surface contact with the contact portion. In this case, each abrasive grain is relatively stably in contact with the abutting portion, and therefore may be positioned in an unstable contact state with respect to the mounting surface of the base. That is, for example, each abrasive grain may be positioned in a state where only one vertex thereof is in contact (point contact) with the mounting surface of the base. Even if such abrasive grains are electrodeposited on the base, they fall off from the base.

  Further, when one surface of each abrasive grain is in surface contact with the contact portion, one surface of each abrasive grain and the contact portion are easily bonded when electrodepositing these abrasive grains on the base. Then, the abrasive grains adhered to the contact portion may be displaced with respect to the mounting surface of the base when separating the contact portion and each abrasive grain. It is possible to do.

  The present invention has been made in consideration of such problems, and a grindstone manufacturing method capable of suppressing the falling of each abrasive grain from the mounting surface of the base and the positional deviation of each abrasive grain with respect to the mounting surface, and It aims at providing a grindstone manufacturing device.

[1] A grindstone manufacturing method according to the present invention is a grindstone manufacturing method for manufacturing a grindstone in which a plurality of abrasive grains are arranged in parallel on a mounting surface of a base, wherein the base is a support portion of an abrasive positioning jig. A dipping step of immersing in a plating solution in a state of being mounted on, and a positioning step of positioning each abrasive grain on the mounting surface while bringing one surface of each abrasive grain into line contact with a contact portion of the abrasive positioning jig; An electrodeposition step of electrodepositing the plurality of positioned abrasive grains on the base.

  According to the grindstone manufacturing method of the present invention, each abrasive grain is positioned on the mounting surface of the base while one surface of each abrasive grain is in line contact with the contact portion. Then, each abrasive grain is in an unstable state with respect to the abutting part as compared with the case where one surface is brought into surface contact with the abutting part. It is easy to position. In other words, each abrasive grain is better seated against the mounting surface of the base. And since such an abrasive grain is firmly electrodeposited to a base by an electrodeposition process, drop-off | omission from the base of each said abrasive grain can be suppressed. Also, each abrasive grain that is in line contact with the abutting portion is less likely to adhere to the abutting portion during the electrodeposition process, compared to the case where one surface of each abrasive grain is in surface contact with the abutting portion. As a result, each abrasive grain adheres to the contact part during the electrodeposition process, and each abrasive grain is prevented from being displaced with respect to the mounting surface of the base when the abrasive grains and the contact part are separated. be able to.

[2] In the above method for producing a grindstone, the electrodeposition step is a temporary electrodeposition step in which the abrasive grains are temporarily electrodeposited on the base, and the abrasive grains and the contact are applied after the temporary electrodeposition step. A separation step of separating the portion and a main electrodeposition step of performing main electrodeposition of the abrasive grains on the base in a state where the abrasive grains and the contact portion are separated from each other may be further performed.

  According to such a method, since the separation step is performed after the temporary electrodeposition step, the bonding of each abrasive grain to the contact portion is more efficient than in the case where the separation step is performed after the main electrodeposition step. Can be suppressed. Thereby, it can suppress further that each abrasive grain shifts | deviates with respect to the attachment surface of a base in the case of a separation | spacing process. Moreover, since this electrodeposition process is performed in a state where each abrasive grain and the contact portion are separated from each other, the plating solution can be reliably brought into contact with the outer peripheral surface of each abrasive grain during this electrodeposition process. In other words, the contact of the plating solution of each abrasive grain is not hindered by the contact portion. Therefore, a uniform plating layer can be formed on each abrasive grain.

[3] In the grinding wheel manufacturing method, in the separation step, a connection bolt that connects the positioning portion including the abutting portion and the support portion is loosened and the support portion and the positioning portion are moved by the elastic force of an elastic member. You may space apart each said abrasive grain and the said contact part by making it move relatively.

  According to such a method, the flow of the plating solution accompanying the separation process can be suppressed as compared with the case where the positioning part and the support part are moved relative to each other manually to separate the abrasive grains and the contact part. . Thereby, it can suppress further that each abrasive grain temporarily electrodeposited on the base is displaced during the separation step.

[4] In the grinding wheel manufacturing method, in the separation step, each of the abrasive grains and the abutting portion may be separated by moving the support portion and the positioning portion while being guided by a guide shaft. Good.

  According to such a method, since the positioning part and the support part can be relatively moved relative to each other, the flow of the plating solution accompanying the separation process can be further suppressed.

[5] A grindstone manufacturing apparatus according to the present invention is a grindstone manufacturing apparatus for manufacturing a grindstone in which a plurality of abrasive grains are arranged in parallel on a mounting surface of a base, and the plurality of the abrasive grains are electrodeposited on the base. In order to do so, it is provided with an abrasive positioning jig that positions the plurality of abrasive grains on the mounting surface in a state of being immersed in a plating solution, and the abrasive positioning jig includes a support portion that supports the base, and And a contact portion for positioning each abrasive grain on the mounting surface in a state of being in line contact with one surface of each abrasive grain.

  According to the grindstone manufacturing apparatus which concerns on this invention, each abrasive grain can be positioned on the attachment surface of a base, making one surface of each abrasive grain line-contact with a contact part. As a result, each abrasive grain comes into contact with the abutting portion in an unstable state as compared with the case where one surface thereof is brought into surface contact with the abutting portion, so that it becomes easier to be stably positioned by the mounting surface of the base. . And since such an abrasive grain can be electrodeposited firmly to a base, the drop-off | omission from the base of the said abrasive grain can be suppressed. In addition, each abrasive grain that is in line contact with the abutting portion is less likely to adhere to the abutting portion when electrodepositing on the base, as compared with the case where one surface of each abrasive grain is in surface contact with the abutting portion. Thereby, when each abrasive grain and an abutting part are spaced apart, it can suppress that these abrasive grains are displaced with respect to the attachment surface of a base.

[6] In the above grindstone manufacturing apparatus, the abutting portion may have a curved surface formed in a circular arc shape in line contact with one surface of each abrasive grain. In this case, one surface of each abrasive grain can be efficiently brought into line contact with the contact portion.

[7] In the above grindstone manufacturing apparatus, the abrasive grain positioning jig includes a positioning part including the abutting part, a connection bolt that connects the positioning part and the support part, the positioning part, and the support part. Each of the abrasive grains and the contact portion by loosening the connection bolt and relatively moving the positioning portion and the support portion by the elastic force of the elastic member. May be separated from each other.

  According to such a structure, compared with the case where the positioning part and the support part are moved relative to each other manually to separate the abrasive grains and the abutting part, the plating accompanying the separation of each abrasive grain and the abutting part is performed. Liquid flow can be suppressed. Thereby, when each abrasive grain and an abutting part are separated, it can suppress further that each abrasive grain positioned (electrodeposited) on the base is displaced.

[8] The grindstone manufacturing apparatus may further include a guide shaft that extends along the axial direction of the connection bolt and guides relative movement between the positioning portion and the support portion.

  According to such a configuration, since the positioning portion and the support portion can be relatively moved relative to each other, the flow of the plating solution accompanying the separation between each abrasive grain and the abutting portion can be further suppressed.

  According to the grindstone manufacturing method and the grindstone manufacturing apparatus according to the present invention, each abrasive grain can be positioned on the mounting surface of the base while bringing one surface of each abrasive grain into line contact with the contact portion. Therefore, dropping of each abrasive grain from the base and displacement of each abrasive grain with respect to the mounting surface can be suppressed.

It is sectional drawing of the grindstone manufacturing apparatus which concerns on one Embodiment of this invention. It is a partially-omission cross-sectional top view of the abrasive grain positioning jig which comprises the said grindstone manufacturing apparatus. It is the flowchart which showed the procedure of the grindstone manufacturing method which concerns on this embodiment. FIG. 4A is a cross-sectional explanatory diagram of a supplying step in the grinding wheel manufacturing method, and FIG. 4B is a cross-sectional explanatory diagram of a positioning step in the grinding stone manufacturing method. It is a partially omitted plan view showing a state in which a plurality of abrasive grains are positioned on the mounting surface of the base. FIG. 6A is a partially omitted cross-sectional view of the temporary electrodeposition step in the grindstone manufacturing method, and FIG. 6B is a partially omitted cross-sectional view of the main electrodeposition step in the grindstone manufacturing method. 7A is a cross-sectional view taken along the line VIIA-VIIA in FIG. 2, and FIG. 7B is a cross-sectional view of the abrasive grain positioning jig in FIG. 7A after the separation step. 8A is a cross-sectional view taken along line VIIIA-VIIIA in FIG. 2, and FIG. 8B is a cross-sectional view of the abrasive grain positioning jig of FIG. 8A after the separation step. 9A is a cross-sectional view taken along line IXA-IXA in FIG. 2, and FIG. 9B is a cross-sectional view of the abrasive positioning jig in FIG. 9A after the separation step. FIG. 10A is a cross-sectional view showing a state where flank surfaces are formed on each abrasive grain, and FIG. 10B is a cross-sectional view illustrating a state in which a workpiece is boring using a grindstone manufactured by a grindstone manufacturing method. FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a grindstone manufacturing method and a grindstone manufacturing apparatus according to the present invention will be described in detail with reference to the accompanying drawings by illustrating preferred embodiments.

  The grindstone manufacturing apparatus 10 according to the present embodiment is an apparatus for manufacturing the grindstone 200 shown in FIGS. 10A and 10B. First, the configuration of the grindstone 200 will be described. The grindstone 200 is used, for example, as a boring tool for processing (grinding) the workpiece W, and includes a base (base metal) 202 made of a metal material and a plurality of abrasives provided on the base 202. Grain 204.

  As shown in FIGS. 2 and 4A, the base 202 has a flat plate portion 206 extending in one direction and a convex portion 208 protruding from the flat plate portion 206 in the thickness direction. A long hole 212 that extends in the width direction of the flat plate portion 206 and through which the bolt 210 is inserted is formed in each of both ends of the flat plate portion 206.

  The convex portion 208 is located between the pair of long holes 212 and extends along the longitudinal direction of the flat plate portion 206. The front end portion of the convex portion 208 has a substantially trapezoidal cross section so that the width becomes narrower toward the front end. That is, a flat attachment surface 214 on which a plurality of abrasive grains 204 are arranged in parallel is formed at the tip of the convex portion 208. 2 and 4A, for the sake of convenience, the size of each abrasive grain 204 with respect to the base 202 is shown exaggerated to be larger than the actual size. In this embodiment, each abrasive grain 204 is composed of a truncated octahedron diamond. However, the shape and material of each abrasive grain can be arbitrarily selected.

  Then, the structure of the grindstone manufacturing apparatus 10 is demonstrated. As shown in FIGS. 1 and 2, the grindstone manufacturing apparatus 10 includes a plating rod 14 that stores a plating solution 12, a plating power source 16, an electrode unit 18 that is immersed in the plating solution 12, and a plurality (three in FIG. 2). And the abrasive grain positioning jig 20 on which the base 202 is mounted.

  The plating solution 12 can be selected from any composition. The plating power supply 16 is electrically connected to the electrode unit 18 and each base 202 so that the electrode unit 18 becomes an anode and each base 202 becomes a cathode. The electrode part 18 can be comprised by arbitrary materials and shapes, for example, a nickel plate is used.

  The abrasive grain positioning jig 20 is for positioning a plurality of abrasive grains 204 on the mounting surface 214 of each base 202, and is immersed in the plating solution 12 with the plurality of bases 202 mounted. . The abrasive grain positioning jig 20 is pivotally supported by a base plate 22 disposed on the bottom surface of the plating rod 14, a pair of connection plates 24 erected on the base plate 22 and opposed to each other, and the connection plates 24. And a rotation plate 28 connected to each of the support pins 26. In FIG. 1, only one connection plate 24 and one support pin 26 are shown.

  The rotating plate 28 has a shape in which a tip end side of a flat plate extending in a direction orthogonal to the axis of each support pin 26 is bent by a predetermined angle toward the base plate 22 side. That is, the rotating plate 28 has a first portion 30 constituting the base end side (side on which each support pin 26 is located) and a second portion 32 constituting the bent distal end side. .

  A hole 34 through which the support bolt 33 is inserted is formed in the second portion 32, and a nut 36 that is screwed into the support bolt 33 is fixed. The front end surface of the support bolt 33 screwed into the nut 36 is in contact with the base plate 22. Thereby, the rotation board 28 is hold | maintained in the state in which the plane of the 1st site | part 30 inclined only the predetermined angle with respect to the horizontal direction.

  The abrasive grain positioning jig 20 further includes a support portion 38 that supports the plurality of bases 202 and a positioning portion 40 that is disposed closer to the support pins 26 than the support portion 38. The support portion 38 includes a movable block 42 that is movably provided in the second portion 32, and a support portion main body 44 that is fixed to the movable block 42. The movable block 42 extends along the axial direction of each support pin 26 (left-right direction in FIG. 2) and has a substantially L-shaped cross section.

  The support body 44 is made of an insulating material. As a constituent material of the support body 44, for example, a resin material such as PEEK (polyether ether ketone) resin can be used. The support portion main body 44 extends along the longitudinal direction of the movable block 42 and has a substantially U-shaped cross section. That is, a long groove 46 extending along the longitudinal direction is formed in the support portion main body 44.

  A plurality of bases 202 are juxtaposed in the long groove 46 along the extending direction thereof. The groove width of the long groove 46 is formed larger than the width dimension of the base 202. A rubber member 48 such as silicon rubber is interposed between the side surface of the groove constituting the long groove 46 and each base 202.

  The support main body 44 is formed with a plurality of bolt holes 52 that are opened on the groove side surface of the long groove 46 and into which a plurality of holding bolts 50 for pressing the rubber member 48 are screwed. A rubber washer 54 is passed through each holding bolt 50. That is, in this embodiment, each base 202 is held in the long groove 46 by screwing each holding bolt 50 into each bolt hole 52 and pressing each rubber member 48 against each base 202 side. As a result, the mounting surface 214 of each base 202 is attached to the abrasive positioning jig 20 in a state inclined with respect to the horizontal direction.

  Note that a plurality of bolt holes (not shown) into which the bolts 210 inserted into the respective long holes 212 of the base 202 are screwed may be formed on the bottom surface of the groove constituting the long groove 46. In this case, the bases 202 can be more firmly held with respect to the support body 44 by tightening the bolts 210 inserted through the long holes 212 into the bolt holes.

  The positioning portion 40 includes a fixed block 56 connected to each support pin 26 and a contact portion (reference block) 58 provided on the fixed block 56. The fixed block 56 extends along the longitudinal direction of the movable block 42. As understood from FIG. 2, the fixing block 56 is provided with three connection bolts 60, two guide shafts 62, and two spring plungers 64. In addition, the number of the connection bolt 60, the guide shaft 62, and the spring plunger 64 can be set arbitrarily.

  The three connection bolts 60 are juxtaposed at a predetermined interval along the longitudinal direction of the fixed block 56 corresponding to each base 202. Each connection bolt 60 is screwed into the bolt hole 68 of the movable block 42 in a state of being inserted into the through hole 66 of the fixed block 56 (see FIG. 7A). Thereby, the support part 38 and the positioning part 40 can be connected reliably.

  The two guide shafts 62 are arranged one by one between the adjacent connection bolts 60. Each guide shaft 62 is press-fitted into the fitting hole 72 of the movable block 42 while being inserted into the through hole 70 of the fixed block 56 (see FIG. 8A).

  The two spring plungers 64 are disposed between the connection bolt 60 and the guide shaft 62 located at the center. As shown in FIG. 9A, each spring plunger 64 has a cylindrical body 74 fixed to the movable block 42. A closing member 76 is fitted in the opening on one end side of the cylindrical body 74, and a spring (elastic member) 78 and a pin 80 are disposed in the cylindrical body 74. The spring 78 is interposed between the closing member 76 and the pin 80, and is configured as a compression coil spring, for example. The pin 80 protrudes from the opening on the other end side of the cylindrical body 74 and the tip thereof is in contact with the movable block 42. That is, each spring plunger 64 presses (biases) the movable block 42 toward the other end side (side where the second portion 32 is located) by the elastic force of the spring 78.

  The abutting portion 58 is made of an insulating material. As a constituent material of the contact part 58, for example, a resin material such as PEEK (polyether ether ketone) resin can be used. The abutment portion 58 includes a holding portion 84 fixed to the fixing block 56 with a plurality of fixing bolts 82 (see FIGS. 2 and 9A), and a plurality of protrusions protruding from the holding portion 84 toward the mounting surface 214 of the base 202. Part 86. The holding portion 84 extends along the extending direction of the fixed block 56.

  The plurality of protrusions 86 are provided corresponding to the plurality of bases 202. That is, in the present embodiment, the protrusions 86 are provided in the same number (three) as the base 202. Each projecting portion 86 extends over the entire length of the mounting surface 214 of each base 202. Moreover, each protrusion part 86 is formed thinly toward the front-end | tip. The tip of each protrusion 86 is spaced from the mounting surface 214 in a state of being positioned approximately at the center in the width direction of the mounting surface 214 of each base 202. The distance between the tip of each protrusion 86 and the mounting surface 214 of each base 202 is set according to the size of the abrasive grains 204. A curved surface 88 (see FIG. 4B) formed in a circular arc shape in line contact with one surface of each abrasive grain 204 is formed at the tip of each protrusion 86.

  The grindstone manufacturing apparatus 10 according to the present embodiment is basically configured as described above, and the operation and effect thereof will be described below in relation to the grindstone manufacturing method.

  First, a plurality of bases 202 and a plurality of abrasive grains 204 to be attached to each base 202 are prepared (step S1: preparation step in FIG. 3). Then, a plurality of bases 202 are mounted on the abrasive positioning jig 20 (step S2: mounting step). Specifically, the holding bolts 50 are tightened into the bolt holes 52 with the plurality of bases 202 arranged in the long grooves 46, and the bottom surfaces of the long grooves 46 are inserted with the bolts 210 inserted into the long holes 212. Tighten to a bolt hole (not shown) formed in Thereby, the plurality of bases 202 are securely held by the support portion main body 44.

  Next, the abrasive grain positioning jig 20 on which the plurality of bases 202 are mounted is immersed in the plating solution 12 of the plating rod 14 (step S3: immersion process). At this time, the mounting surface 214 of each base 202 is inclined by a predetermined angle with respect to the horizontal direction. In other words, the mounting surface 214 is inclined obliquely downward toward the fixed block 56. In addition, you may perform this immersion process before step S2. That is, a plurality of bases 202 may be mounted on the abrasive grain positioning jig 20 with the abrasive grain positioning jig 20 immersed in the plating solution 12.

  Subsequently, a plurality of abrasive grains 204 are supplied to the mounting surface 214 of each base 202 (step S4: supply process). Specifically, as shown in FIG. 4A, the plurality of supply cylinders 215 are arranged such that the front end openings are directed to the respective abrasive grain installation sites on the mounting surface 214 of each base 202. Then, the abrasive grains 204 are introduced into each supply cylinder 215. Each abrasive grain 204 derived from the tip opening of each supply cylinder 215 rolls on the attachment surface 214 and is positioned on the attachment surface 214 in a state where one surface of each abrasive grain 204 is in line contact with the contact portion 58 (step). S5: Positioning step, see FIG. 4B).

  At this time, since one surface of each abrasive grain 204 is in line contact with a curved surface 88 having a circular arc shape formed at the tip of each protrusion 86, each abrasive grain 204 is relatively unstable with respect to the abutting portion 58. Contact in state. Therefore, each abrasive grain 204 is stably positioned with respect to the mounting surface 214 of each base 202. In other words, each abrasive grain 204 is positioned in a state in which a surface different from one surface that contacts each contact portion 58 is in surface contact with the mounting surface 214 of each base 202.

  Further, as can be understood from FIG. 4B, each contact portion 58 comes into contact with one surface of each abrasive grain 204 obliquely from above. As a result, the plurality of abrasive grains 204 positioned on the mounting surface 214 of each base 202 are juxtaposed (aligned) with one surface in contact with each contact portion 58 positioned on the same plane. . Here, as shown in FIG. 5, a plurality of abrasive grains 204 are mixed with abrasive grains 204 having different particle diameters (hereinafter, abrasive grains 204 having a relatively large particle diameter may be referred to as abrasive grains 204a). There are things to do. However, even in such a case, each of the abrasive grains 204, 204a is located on the same plane with one surface in contact with each contact portion 58.

  After positioning the plurality of abrasive grains 204 with respect to all of the plurality of bases 202 mounted on the abrasive grain positioning jig 20, each abrasive grain 204 is temporarily electrodeposited on the mounting surface 214 of each base 202. (Step S6: provisional electrodeposition process). That is, by applying a predetermined voltage between each base 202 and the electrode portion 18 for a predetermined temporary electrodeposition time, the temporary plating layer 90 is formed on the mounting surface 214 of each base 202 (see FIG. 6A). ). At this time, since a masking agent is applied in advance to a portion of each base 202 where plating is not desired, the provisional plating layer 90 is formed only on the mounting surface 214. The temporary plating layer 90 is set to a thickness of about 5% of the required plating thickness.

  Then, when the provisional electrodeposition step is completed, each contact portion 58 and each abrasive grain 204 are separated by turning and loosening the plurality of connection bolts 60 using a tool (not shown) (step S7: separation step). When the plurality of connection bolts 60 are loosened, the movable block 42 pressed by the plurality of spring plungers 64 moves to the side where the second portion 32 is positioned while being guided by the plurality of guide shafts 62 (see FIGS. 7A to 9B). . Thereby, each contact part 58 and each abrasive grain 204 will separate.

  As described above, when the movable block 42 is moved by the elastic force of the plurality of spring plungers 64 by rotating and loosening the plurality of connection bolts 60 using the tool, the movable block 42 is directly moved manually. The flow of the plating solution 12 during the separation step is suppressed. Therefore, each abrasive grain 204 temporarily electrodeposited on each base 202 is not displaced during the separation process. Further, the movable block 42 can be moved relative to the fixed block 56 at a relatively low speed by gradually turning and loosening each connection bolt 60 with the tool. In this case, the flow of the plating solution 12 is efficiently suppressed.

  When each contact portion 58 is separated from each abrasive grain 204, each abrasive grain 204 is subjected to main electrodeposition on the mounting surface 214 of each base 202 (step S8: main electrodeposition process). That is, the main plating layer 92 is formed on the mounting surface 214 of each base 202 by applying a predetermined voltage between each base 202 and the electrode portion 18 for a predetermined main electrodeposition time (see FIG. 6B). ). In this case as well, the main plating layer 92 is formed only on the mounting surface 214 of each base 202 to which no masking agent is applied.

  After the electrodeposition process is completed, the plurality of bases 202 are removed from the abrasive positioning jig 20 (step S9: removal process). Then, these bases 202 are transferred to a processing station, and flank surfaces 216 are formed on each of the abrasive grains 204 that are electrodeposited on each base 202 using a processing device (not shown) (step S10: processing step, diagram). 10A). Thereby, the some grindstone 200 will be manufactured.

  In each grindstone 200 manufactured in this manner, the edge 220 of the boundary between the rake face 218 and the flank 216 in each abrasive grain 204 is positioned on the same straight line substantially parallel to the mounting surface 214. It becomes. That is, as can be seen from FIG. 10A, the blade portions 220a of the abrasive grains 204a having a relatively large particle size and the blade portions 220 of the other plurality of abrasive grains 204 are substantially straight and substantially parallel to the mounting surface 214. It will be located on the line. In other words, the height of each abrasive grain 204, 204a from the mounting surface 214 of the blade 220 is substantially uniform. Thereby, the said workpiece | work W can be bored (ground) in the state which made all the abrasive grains 204 and 204a act on the workpiece | work W (refer FIG. 10B). Therefore, it is possible to reduce the number of abrasive grains 204 and realize stable machining of the workpiece W.

  According to the present embodiment, each abrasive grain 204 is positioned on the mounting surface 214 of each base 202 while one surface of each abrasive grain 204 is in line contact with each abutment portion 58. Then, each abrasive grain 204 comes into contact with each abutment portion 58 in an unstable state as compared with the case where one surface thereof is in surface contact with each abutment portion 58, so that the abrasive grains 204 contact the attachment surface 214 of each base 202. On the other hand, it becomes easy to position stably (in a surface contact state). In other words, each abrasive grain 204 is better seated against the mounting surface 214 of each base 202. And since such an abrasive grain 204 is firmly electrodeposited on the base 202 by the temporary electrodeposition process and the main electrodeposition process, dropping of the abrasive grain 204 from the base 202 can be suppressed.

  In addition, each abrasive grain 204 that is in line contact with each abutting part 58 is more likely to have each abutting part 58 during the temporary electrodeposition process than when one surface of each abrasive grain 204 is in surface contact with each abutting part 58. It becomes difficult to adhere to. This prevents each abrasive grain 204 from adhering to each contact portion 58 during the temporary electrodeposition process, and prevents each abrasive grain 204 from being displaced relative to the mounting surface 214 of each base 202 during the separation process. be able to. Furthermore, since one surface of each abrasive grain 204 is in line contact with each contact part 58, the amount of the plating solution 12 flowing between each abrasive grain 204 and each contact part 58 during the separation process is relatively small. can do. Therefore, the flow of the plating solution 12 accompanying the separation step can be suitably suppressed.

  In the present embodiment, each contact portion 58 has a curved surface 88 formed in a circular arc shape in line contact with one surface of each abrasive grain 204. Thereby, one surface of each abrasive grain 204 can be efficiently brought into line contact with the curved surface 88 of each contact portion 58.

  In this embodiment, since the separation step is performed after the temporary electrodeposition step, the bonding of each abrasive grain 204 to each contact portion 58 is more efficient than in the case where the separation step is performed after the main electrodeposition step. Can be suppressed. Thereby, it can further suppress that each abrasive grain 204 shifts | positions with respect to the attachment surface 214 of each base 202 in the space | interval process. Further, since the main electrodeposition process is performed in a state where each abrasive grain 204 and each contact portion 58 are separated from each other, the plating solution 12 can be reliably brought into contact with the outer peripheral surface of each abrasive grain 204 during the main electrodeposition process. . In other words, the contact portion 58 does not hinder the contact of the plating solution 12 of each abrasive grain 204. Therefore, a uniform plating layer (main plating layer 92) can be formed on each abrasive grain 204.

  According to the present embodiment, each connection bolt 60 is turned and loosened using a predetermined tool, and the support portion 38 is moved with respect to the positioning portion 40 by the elastic force of each spring plunger 64, whereby each abrasive grain 204 and The abutting portion 58 is spaced apart. Thereby, compared with the case where the support part 38 is directly moved manually with respect to the positioning part 40 and each abrasive grain 204 and each contact part 58 are separated, the flow of the plating solution 12 accompanying a separation process is suppressed. Can do. Therefore, it is possible to further suppress the positional deviation of each abrasive grain 204 temporarily electrodeposited on each base 202 during the separation step.

  Further, the support portion 38 is moved while being guided by the plurality of guide shafts 62 with respect to the positioning portion 40. Thereby, since the support part 38 can be smoothly moved with respect to the positioning part 40, the flow of the plating solution 12 accompanying a separation process can further be suppressed.

  The present embodiment is not limited to the configuration or method described above. For example, the abrasive grain positioning jig 20 may be configured so that only one base 202 can be mounted. In the above-described embodiment, the abrasive grains 204 and the abutting portions 58 are separated from each other by moving the support portion 38 with respect to the positioning portion 40. However, the abrasive grains 204 and the contact portions 58 may be separated by moving the positioning portion 40 relative to the support portion 38. That is, the abrasive grain positioning jig 20 only needs to be configured such that each abrasive grain 204 and the abutting part 58 can be separated by relatively moving the support part 38 and the positioning part 40.

  The abrasive positioning jig 20 according to the present embodiment is configured by interposing one or more spring members or rubber members between the movable block 42 and the fixed block 56 instead of the plurality of spring plungers 64. Also good. Even in this case, the support portion 38 and the positioning portion 40 can be relatively moved.

  The present invention is not limited to the above-described embodiment, and it is naturally possible to adopt various configurations without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Grinding wheel manufacturing apparatus 12 ... Plating solution 20 ... Abrasive grain positioning jig 38 ... Support part 40 ... Positioning part 58 ... Contact part 60 ... Connection bolt 62 ... Guide shaft 64 ... Spring plunger 78 ... Spring (elastic member)
88 ... Curved surface 200 ... Grinding stone 202 ... Base 204 ... Abrasive grain 214 ... Mounting surface

Claims (8)

A whetstone manufacturing method for manufacturing a whetstone in which a plurality of abrasive grains are arranged side by side on a mounting surface of a base,
An immersion step of immersing the base in a plating solution in a state where the base is mounted on a support portion of an abrasive positioning jig;
A positioning step of positioning each abrasive grain on the mounting surface while bringing one surface of each abrasive grain into line contact with a contact portion of the abrasive positioning jig;
An electrodeposition step of electrodepositing a plurality of positioned abrasive grains on the base;
I do,
A method for producing a whetstone characterized by that. In the grindstone manufacturing method of Claim 1,
The electrodeposition step is a temporary electrodeposition step of temporarily electrodepositing the abrasive grains on the base,
A separation step of separating the abrasive grains and the contact portion after the temporary electrodeposition step;
A main electrodeposition step of main electrodepositing the abrasive grains on the base in a state where the abrasive grains and the abutting portion are separated from each other;
Do further,
A method for producing a whetstone characterized by that. In the grinding stone manufacturing method according to claim 2,
In the separation step, each of the abrasive grains is loosened by loosening a connection bolt that connects the positioning portion including the abutting portion and the support portion and relatively moving the support portion and the positioning portion by an elastic force of an elastic member. And the abutting portion are separated from each other,
A method for producing a whetstone characterized by that. In the grindstone manufacturing method of Claim 3,
In the separation step, each of the abrasive grains and the abutting portion are separated by moving relative to each other while guiding the support portion and the positioning portion with a guide shaft.
A method for producing a whetstone characterized by that. A whetstone manufacturing apparatus for manufacturing a whetstone in which a plurality of abrasive grains are arranged in parallel on the mounting surface of the base,
In order to electrodeposit a plurality of abrasive grains on the base, an abrasive positioning jig for positioning the plurality of abrasive grains on the mounting surface in a state immersed in a plating solution,
The abrasive grain positioning jig includes a support portion that supports the base;
A contact portion for positioning each abrasive grain on the mounting surface in a line contact with one surface of each abrasive grain;
have,
A whetstone manufacturing apparatus characterized by that. In the grindstone manufacturing apparatus according to claim 5,
The abutting portion has a curved surface formed in a circular arc shape in line contact with one surface of each abrasive grain.
A whetstone manufacturing apparatus characterized by that. In the grindstone manufacturing apparatus according to claim 5 or 6,
The abrasive grain positioning jig includes a positioning part including the abutting part,
A connection bolt for connecting the positioning portion and the support portion;
An elastic member for relatively moving the positioning portion and the support portion;
Further comprising
By loosening the connection bolt and moving the positioning part and the support part relative to each other by the elastic force of the elastic member, thereby separating the abrasive grains and the contact part,
A whetstone manufacturing apparatus characterized by that. In the grindstone manufacturing apparatus according to claim 7,
A guide shaft that extends along an axial direction of the connection bolt and guides relative movement between the positioning portion and the support portion;
A whetstone manufacturing apparatus characterized by that.

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