JP6463940B2 - Manufacturing method of total rotary dresser - Google Patents

Description

The present invention relates to a manufacturing method of the form-rotary Dore' service.

  The general-purpose rotary dresser is manufactured by temporarily fixing superabrasive grains on the inner peripheral surface of a cylindrical mold and putting a bonding agent between the outer peripheral surface of the base and the inner peripheral surface of the mold. It is known (see Patent Document 1). Since the superabrasive grains are arranged along the inner peripheral surface of the mold, the tip heights of the superabrasive grains are aligned with high accuracy. Various materials such as diamond are applied to the super abrasive grains of the overall rotary dresser. For example, there is a document describing a triangular superabrasive grain (see Patent Document 2).

JP 2013-94907 A Japanese Patent No. 5525546

However, in the manufacturing method of the overall rotary dresser using the cylindrical mold, the shape of the tip surface of the superabrasive grains varies, and the sharpness may vary depending on the position.
The present invention, using other methods, while the desired height tip height of superabrasive with high accuracy, a manufacturing method of form-rotary Dore' service that can suppress variations in the shape of the front end surface of the superabrasive provide.

A manufacturing method of a general rotary dresser includes a base that is formed in a disk shape and has an outer peripheral surface of a predetermined shape with different outer diameters according to an axial position, and a plurality of superabrasive grains. a superabrasive layer disposed to a process for the preparation of form-rotary dresser with a diamond sheet form to form the diamond on the surface of a planar substrate evenly grown in a thickness direction on a flat diamond sheet In the one extending direction of the diamond sheet, the inclined surfaces formed by the trapezoidal legs are opposed to each other in the extending direction of the diamond sheet between the step and the abrasive grains cut out adjacent to each other from the diamond sheet. In the other extending direction, which is a direction perpendicular to the one extending direction, the upper bottom surfaces constituted by the upper bases of the trapezoid and the lower bottom surfaces constituted by the lower bottoms of the trapezoid are opposed to each other. By cutting the cutting line, and the superabrasive forming step of cutting said plurality of superabrasive grains in a trapezoidal flat plate of the same shape of the same height, the lower bottom surface of said plurality of trapezoidal plate-shaped superabrasive the Positioning and fixing at different axial positions on the outer peripheral surface of the base, and positioning and fixing the lower bottom surfaces of the plurality of trapezoidal plate-like superabrasive grains at different circumferential positions on the outer peripheral surface of the base A superabrasive fixing step.
In addition, the manufacturing method of the overall rotary dresser includes a base that is formed in a disc shape and has a predetermined outer peripheral surface having a different outer diameter according to the axial position, and a plurality of superabrasive grains. and ultra abrasive grain layer which is arranged on the surface, a method for producing a form-rotary dresser with a diamond forming a diamond on the surface of the flat base material uniformly grown in a thickness direction on a flat diamond sheet Between the abrasive grains formed adjacently among the abrasive grains cut out from the diamond sheet and the sheet forming step, in one extending direction of the diamond sheet, the inclined surfaces formed by the trapezoidal legs are opposed to each other, and on the other hand in the extending direction of the direction perpendicular to the extending direction of the one, the trapezoid is that the cutting by the cutting line so that the vertical surfaces are appearing in cross-section facing said plurality of super A superabrasive forming step of cutting the grain at the same height of the trapezoidal flat plate of the same shape, of the base of the lower bottom surface, wherein the plurality of trapezoid flat of the trapezoidal lower base of the super abrasive grains constituting the outer peripheral surface A superabrasive fixing step for positioning and fixing at different axial positions, and positioning and fixing the lower bottom surfaces of the plurality of trapezoidal tabular superabrasive grains at different circumferential positions on the outer peripheral surface of the base; .

The manufacturing method of the above-described general rotary dresser has the following effects. The superabrasive layer of the overall rotary dresser is formed in a trapezoidal flat plate shape having a predetermined height and is formed using a plurality of superabrasive grains. That is, the variation in the shape of the plurality of superabrasive grains is small. The superabrasive grains formed in this manner are arranged so that the bottom surface of the superabrasive grains faces the outer peripheral surface of the base. Therefore, the tip height of the superabrasive grains becomes a desired height with high accuracy. Furthermore, the variation in the shape of the tip surface of the superabrasive grains is small.

It is an axial sectional view of a general-purpose rotary dresser. However, FIG. 1 shows only one side from the central axis of the general rotary dresser. The enlarged view of the 1st example of A part of FIG. 1 is shown. The enlarged view of the 2nd example of A part of FIG. 1 is shown. The enlarged view of the 3rd example of the A section of FIG. 1 is shown. The enlarged view of the 4th example of A section of Drawing 1 is shown. It is a flowchart which shows the manufacturing method of a total form rotary dresser. It is a perspective view of the diamond sheet for producing | generating the superabrasive grain applied to FIG. 2A, FIG. 2B, and FIG. 2C. It is a perspective view of the other diamond sheet for producing | generating the superabrasive grain applied to FIG. 2A, FIG. 2B, and FIG. 2C. It is a perspective view of the diamond sheet for producing the superabrasive grain applied to FIG. 2D. It is an expansion perspective view of the superabrasive grain produced | generated by the diamond sheet | seat of FIG. 4A and FIG. 4B. It is an expansion perspective view of the superabrasive grain produced | generated with the diamond sheet | seat of FIG. 4C.

  The overall rotary dresser 10 is formed in a disk shape as shown in FIG. The overall rotary dresser 10 has an outer peripheral surface of a predetermined shape having a different outer diameter according to the position in the axial direction. In the present embodiment, for example, the outer peripheral surface of the general rotary dresser 10 has an arc-shaped axial cross-sectional shape.

  For example, when the overall rotary dresser 10 is used to form the outer peripheral surface of a grinding wheel (not shown), the outer peripheral surface of the grinding wheel is transferred to the arc concave shape by the arc concave portion of the overall rotary dresser 10; That is, it is formed in a circular arc shape.

  The complete rotary dresser 10 includes a base 20 and a superabrasive grain layer 30. The base 20 is formed in a disk shape. The base 20 has an outer peripheral surface of a predetermined shape having a different outer diameter according to the axial position. The shape of the outer peripheral surface of the base 20 is a shape obtained by reducing the diameter of the outer peripheral surface shape of the overall rotary dresser 10. That is, the axial cross-sectional shape of the outer peripheral surface of the base 20 is the same shape as the axial cross-sectional shape of the outer peripheral surface of the general rotary dresser 10. In the present embodiment, the outer peripheral surface of the base 20 has an arc-shaped axial cross-sectional shape. In addition, the outer peripheral surface of the base 20 can be tapered in addition to the circular arc concave shape. The base 20 is made of metal. For example, the base 20 is formed of a material whose main component is iron.

  The superabrasive layer 30 is disposed on the outer peripheral surface of the base 20. That is, the superabrasive layer 30 is formed over the entire circumference of the outer peripheral surface of the base 20 and within a predetermined axial width range of the outer peripheral surface of the base 20. In the present embodiment, the superabrasive grain layer 30 is disposed on the arcuate concave cross-sectional portion of the base 20. The superabrasive layer 30 includes a plurality of superabrasive grains 31. The plurality of superabrasive grains 31 are disposed at different axial positions on the outer peripheral surface of the base 20 and are disposed at different circumferential positions on the outer peripheral surface of the base 20. Specifically, the superabrasive grain layer 30 is formed by arranging a plurality of superabrasive grains 31 side by side on the outer peripheral surface of the base 20. That is, the bottom surfaces of the plurality of superabrasive grains 31 are arranged to face the outer peripheral surface of the base 20. These superabrasive grains 31 use single crystal diamond or polycrystalline diamond.

  As shown in FIG. 2A, the superabrasive grain layer 30 a of the first example includes a plurality of superabrasive grains 31 a and a joint portion 32 a that joins the plurality of superabrasive grains 31 a to the base 20. The superabrasive grains 31a are formed by cutting into a trapezoidal flat plate shape or a truncated pyramid shape. That is, the superabrasive grain 31a has a tip surface and a bottom surface, and the bottom surface is formed in a tapered shape larger than the tip surface. In this embodiment, all the superabrasive grains 31a are formed in the same shape.

  The joining portion 32a joins the base 20 and a part of the bottom and side surfaces of the superabrasive grain 31a. When the superabrasive grains 31a are formed in a trapezoidal flat plate shape, the superabrasive grains 31a are arranged so that the extending direction of the flat plates of the superabrasive grains 31a faces the axial direction of the overall rotary dresser 10. When the optimum grinding state can be obtained by the direction of the superabrasive grains 31a, the direction of the superabrasive grains 31a may be set as described above. The joint portion 32a is, for example, electrodeposition, sintering, brazing, metal bond, resin bond, and adhesive. The thickness of the joint portion 32a varies depending on the type of the joint portion 32a.

  As shown in FIG. 2B, the superabrasive grain layer 30b of the second example includes a plurality of superabrasive grains 31a of the same type as the first example, and a joint portion 32b that joins the superabrasive grains 31a to the base 20. . The joining part 32b joins the bottom surface of the superabrasive grain 31a and the base 20. The joining part 32b is, for example, an adhesive. In the superabrasive grain 31a in the superabrasive grain layer 30b of the second example, the extending direction of the flat plate of the superabrasive grain 31a faces the axial direction of the overall rotary dresser 10 as in the superabrasive grain layer 30a of the first example. Are arranged as follows.

  As shown in FIG. 2C, the superabrasive grain layer 30 c of the third example includes a plurality of superabrasive grains 31 a of the same type as the first example, and a joint portion 32 c that joins the superabrasive grains 31 a to the base 20. . The joining portion 32 c joins the bottom surface of the superabrasive grain 31 a and the base 20. However, the superabrasive grain 31a in the superabrasive grain layer 30c of the third example is different from the superabrasive grain layer 30a of the first example, and the extending direction of the flat plate of the superabrasive grain 31a is the circumferential direction of the general rotary dresser 10 It is arranged to face. When the optimum grinding state can be obtained by the direction of the superabrasive grains 31a, the direction of the superabrasive grains 31a may be set as described above.

  As shown in FIG. 2D, the superabrasive grain layer 30d of the fourth example includes a plurality of superabrasive grains 31d different from the first example and a joint portion 32d that joins the superabrasive grains 31d to the base 20. . The superabrasive grains 31d are formed by being cut into a column shape, for example, a prismatic shape or a cylindrical shape. That is, the superabrasive grain 31d has a tip surface and a bottom surface having the same shape.

  Similar to FIG. 2A, the joining portion 32 d joins the base 20 and a part of the bottom and side surfaces of the superabrasive grain 31 d. The joint 32d is, for example, electrodeposition, sintering, brazing, metal bond, resin bond, and adhesive. The thickness of the joint portion 32d varies depending on the type of the joint portion 32d. In addition, when the superabrasive grains 31d are formed in a flat plate column shape, the superabrasive grains 31d are arranged such that the extending direction of the flat plates of the superabrasive grains 31d is the circumferential direction of the overall rotary dresser 10 as in the first example. You may make it arrange | position so that it may face, and you may make it arrange | position so that it may face an axial direction similarly to the 3rd example. That is, the direction of the superabrasive grains 31d is set so as to obtain an optimum grinding state.

  As shown in FIG. 3, the manufacturing method of the above-described general rotary dresser 10 first forms diamond sheets 40a, 40b, and 40c (step S1: diamond sheet forming step). The diamond sheets 40a, 40b, and 40c are shown in FIG. 5A or FIG. 5B. The diamond sheets 40a, 40b, and 40c are formed by, for example, growing in the normal direction (upward direction in FIGS. 4A, 4B, and 4C) on the upper surface of a planar base material (not shown) by CVD. That is, the diamond sheets 40a, 40b, and 40c are formed by growing in the thickness direction. In this case, the diamond sheets 40a, 40b, and 40c are polycrystalline diamond. The diamond sheets 40a, 40b, and 40c can be formed of single crystal diamond, and can be formed of PVD in addition to CVD.

  Subsequently, as shown in FIG. 3, the diamond sheets 40a, 40b, and 40c are cut out to form superabrasive grains 31a and 31d (step S2: superabrasive grain forming step). The superabrasive grains 31a and 31d are cut along the cut lines indicated by broken lines in the diamond sheets 40a, 40b, and 40c in FIGS. 4A and 4B.

  By cutting along the cut line shown in FIG. 4A, trapezoidal plate-like superabrasive grains 31a shown in FIGS. 2A, 2B, and 2C are formed. The superabrasive grains 31a formed in this way are shown in FIG. 5A. As shown in FIG. 5A, the trapezoidal plate-like superabrasive grains 31a have a tip surface 51a and a bottom surface 52a. Moreover, the height of all the superabrasive grains 31a is Ha. That is, the height direction of the superabrasive grains 31a matches the growth direction of diamond in the diamond sheet 40a.

  By cutting along the cutting line shown in FIG. 4B, trapezoidal plate-like superabrasive grains 31a (shown in FIG. 5A) shown in FIGS. 2A, 2B, and 2C are formed. In this case, the width direction (depth direction in FIG. 5A) of the superabrasive grains 31a coincides with the growth direction of diamond in the diamond sheet 40b.

  By cutting along the cut line shown in FIG. 4C, prismatic superabrasive grains 31d shown in FIG. 2D are formed. The superabrasive grains 31d thus formed are shown in FIG. 5B. As shown in FIG. 5B, the prismatic superabrasive grains 31d have a tip surface 51d and a bottom surface 52d. Moreover, the height of all the superabrasive grains 31d is Hd. That is, the height direction of the superabrasive grains 31d matches the growth direction of diamond in the diamond sheet 40c. Of course, the width direction of the superabrasive grains 31d may coincide with the diamond growth direction in the diamond sheet 40c.

  Subsequently, as shown in FIG. 3, the formed superabrasive grains 31a and 31d are positioned and fixed at different axial positions on the outer peripheral surface of the base 20, and the plurality of superabrasive grains 31a and 31d are fixed to the base. It positions and fixes to the circumferential direction position where 20 outer peripheral surfaces differ (step S3: superabrasive grain fixing process). For example, the case where superabrasive grains 31a and 31d are fixed to the base 20 by electrodeposition will be described as an example. First, as shown in FIG. 1, each of the plurality of superabrasive grains 31 a and 31 d is temporarily fixed to a portion of the base 20 having an arc concave axial sectional shape with an adhesive or the like. The adhesive used in this case is, for example, a conductive adhesive formed of an epoxy resin adhesive and a silver paste.

  By forming a plating layer on the surface of the base 20 in the temporarily fixed state, the plating layer fixes the plurality of superabrasive grains 31 a and 31 d to the base 20. In this way, the overall rotary dresser 10 as shown in FIG. 1 is manufactured. The superabrasive grains 31a and 31d make the number of superabrasive grains 31a and 31d constant at any axial position of the base 20. This can reduce the dress resistance and suppress uneven wear and maintain the shape accuracy of the overall rotary dresser 10 for a long period of time.

  As described above, the overall rotary dresser 10 is formed in a disk shape, and includes a base 20 having a predetermined outer peripheral surface having a different outer diameter according to the axial position, and a plurality of superabrasive grains 31a and 31d. A plurality of superabrasive grains 31a, 31d formed in a predetermined shape having a predetermined height Ha, Hd, and a superabrasive grain layer 30 disposed on the outer peripheral surface of The plurality of superabrasive grains 31 a and 31 d are disposed at different axial positions on the outer peripheral surface of the base 20 so that the bottom surfaces of the superabrasive grains 31 a and 31 d are opposed to the outer peripheral surface of the base 20. Each is arranged.

  Further, the manufacturing method of the overall rotary dresser 10 includes a superabrasive grain forming step (step S2) in which a plurality of superabrasive grains 31a and 31d are formed in a predetermined shape with predetermined heights Ha and Hd, and a plurality of superabrasive grains 31a. , 31d is positioned and fixed at different axial positions on the outer peripheral surface of the base 20, and a plurality of superabrasive grains 31a, 31d are positioned and fixed at different circumferential positions on the peripheral surface of the base 20. A process (step S3).

  The general rotary dresser 10 and the manufacturing method thereof have the following effects. The superabrasive grain layer 30 of the overall rotary dresser 10 is formed in a predetermined shape having predetermined heights Ha and Hd, and is formed using a plurality of superabrasive grains 31a and 31d. That is, the variation in the shape of the plurality of superabrasive grains 31a and 31d is small. The superabrasive grains 31 a and 31 d thus formed are arranged such that the bottom surfaces 52 a and 52 d of the superabrasive grains 31 a and 31 d face the outer peripheral surface of the base 20. Therefore, the tip heights of the superabrasive grains 31a and 31d become a desired height with high accuracy. Furthermore, the variation in the shape of the tip surfaces of the superabrasive grains 31a and 31d is small.

  Moreover, the front end surfaces of the plurality of superabrasive grains 31a and 31d are formed in the same shape. That is, in cutting out from the diamond sheets 40a, 40b, and 40c, the front end surfaces of the superabrasive grains 31a and 31d are performed in the same shape. Therefore, the sharpness is stabilized.

  The plurality of superabrasive grains 31a and 31d are formed in a predetermined shape having the same height. Therefore, the positions of the tip surfaces of the superabrasive grains 31a and 31d fixed to the base 20 are in the normal direction from the arcuate concave outer peripheral surface of the base 20 by the heights Ha and Hb of the superabrasive grains 31a and 31d. The position is shifted. Therefore, the tip end surface positions of the superabrasive grains 31a and 31d can be positioned with high accuracy by forming the arc-shaped concave outer peripheral surface of the base 20 with high accuracy. In other words, the overall rotary dresser 10 can realize high-precision machining of the workpiece.

  In particular, the plurality of superabrasive grains 31a and 31d are formed in the same shape. In this case, the heights of the plurality of superabrasive grains 31a and 31d are the same, and the shape of the tip surface is the same. In this case, the plurality of superabrasive grains 31a and 31d may be arranged at any position on the base 20, and the positioning of the plurality of superabrasive grains 31a and 31d is facilitated.

  The plurality of superabrasive grains 31d may be formed in a column shape as shown in FIG. 5B. In this case, when the superabrasive grain 31d is worn, the shape of the tip surface of the superabrasive grain 31d does not change. Therefore, the sharpness is stable for a long time.

  Further, the plurality of superabrasive grains 31a may be formed to have the same height Ha, and the bottom surface 52a may be formed in a tapered shape larger than the tip surface 51a. In this case, since the joining surface between the base 20 and the superabrasive grains 31a is increased, the force for holding the superabrasive grains 31a by the joining portions 32a and 32b is increased. Furthermore, since the front end surface of the superabrasive grain 31a becomes small, the sharpness is improved.

10: Total rotary dresser, 20: Base, 30, 30a, 30b, 30c, 30d: Superabrasive layer, 31, 31a, 31d: Superabrasive, 32a, 32b: Joint, 40a, 40b, 40c: Diamond Sheet, 51a, 51d: tip surface, 52a, 52d: bottom surface

Claims (6)

A base formed in a disc shape and having an outer peripheral surface of a predetermined shape having a different outer diameter according to the axial position;
A plurality of superabrasive grains, a superabrasive grain layer disposed on the outer peripheral surface of the base;
A manufacturing method of a general-purpose rotary dresser comprising:
And diamond sheet forming step of forming a plate-shaped diamond sheet diamond on the surface of a planar substrate evenly grown in the thickness direction,
Among the abrasive grains cut out from the diamond sheet, in one extending direction of the diamond sheet, the inclined surfaces constituting the trapezoidal legs are opposed to each other in the one extending direction of the diamond sheet. In the other extending direction, which is a direction perpendicular to the extending direction, by cutting out by cutting lines so that the upper bottom surfaces formed by the upper base of the trapezoid and the lower bottom surfaces formed by the lower surface of the trapezoid face each other, A superabrasive grain forming step of cutting the plurality of superabrasive grains into a trapezoidal flat plate having the same shape and the same height;
The lower bottom surfaces of the plurality of trapezoidal plate-like superabrasive grains are positioned and fixed at different axial positions on the outer peripheral surface of the base, and the lower bottom surfaces of the plurality of trapezoidal plate-like superabrasive grains are A superabrasive fixing step for positioning and fixing at different circumferential positions of the outer peripheral surface of the base;
A method for manufacturing a general-purpose rotary dresser. A base formed in a disc shape and having an outer peripheral surface of a predetermined shape having a different outer diameter according to the axial position;
A plurality of superabrasive grains, a superabrasive grain layer disposed on the outer peripheral surface of the base;
A manufacturing method of a general-purpose rotary dresser comprising:
And diamond sheet forming step of forming a plate-shaped diamond sheet diamond on the surface of a planar substrate evenly grown in the thickness direction,
Between the abrasive grains formed adjacently among the abrasive grains cut out from the diamond sheet, in one extending direction of the diamond sheet, the inclined surfaces formed by the trapezoidal legs face each other, and the one extending In the other extending direction, which is a direction perpendicular to the existing direction, the plurality of superabrasive grains have the same height by cutting out with a cutting line so that the vertical surfaces where the trapezoidal shape appears in the cross section are opposed to each other. A superabrasive grain forming step of cutting into a trapezoidal flat plate shape ,
With positioning and fixing the lower bottom surface of said plurality of trapezoidal flat of the trapezoidal lower base of the super abrasive grains constituting the different axial positions of the outer peripheral surface of said base, said plurality of trapezoidal plate-shaped superabrasive A superabrasive fixing step of positioning and fixing the lower bottom surface of the grains at different circumferential positions of the outer peripheral surface of the base;
A method for manufacturing a general-purpose rotary dresser. 2. The method for manufacturing a general rotary dresser according to claim 1, wherein the trapezoidal plate-like superabrasive grains cut out in the superabrasive grain forming step are cut out so that a width direction thereof coincides with a growth direction of the diamond sheet. 3. The method for manufacturing a general rotary dresser according to claim 2, wherein in the superabrasive grain forming step, the trapezoidal plate-like superabrasive grain cut out is cut out such that a height direction thereof coincides with a growth direction of the diamond sheet. . 5. The superabrasive fixing step according to claim 1, wherein the trapezoidal plate-like superabrasive grain extends in the width direction of the total rotary dresser. A manufacturing method of the described overall rotary dresser. 5. The superabrasive fixing step according to claim 1, wherein in the superabrasive fixing step, the trapezoidal flat superabrasive grain extends in a circumferential direction of the total rotary dresser. A manufacturing method of the described overall rotary dresser.

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