JP5520690B2 - Grinding stone manufacturing method and abrasive grain positioning jig - Google Patents

Description

  The present invention relates to a grinding wheel manufacturing technique in which abrasive grains are arranged on one surface of a table.

  Various types of grindstones have been proposed as tools for grinding workpieces. As one of these grindstones, a grindstone in which abrasive grains are arranged on one surface of a table is known (see, for example, Patent Document 1 (FIG. 4)).

Patent document 1 is demonstrated based on the following figure.
As shown in FIG. 7, the grindstone 100 includes a table 101 and abrasive grains 103 and 104 bonded to the upper surface of the table 101 with a plating layer 102. The flank surfaces 108 and 109 can be formed by grinding the tops 105 and 106 of the abrasive grains of the grindstone 100 to a predetermined angle. By having the flank surfaces 108 and 109, the grindstone 100 can efficiently grind the workpiece.

  By the way, it is considered that the abrasive grains 103 and 104 adhered to the upper surface of the grindstone 100 are dispersed not only in the width direction (left and right direction in the drawing) of the grindstone 100 but also in the longitudinal direction (front and back direction in the drawing). .

  When the abrasive grains are dispersed in the longitudinal direction (the front and back direction in the drawing), as shown in FIG. 8, the abrasive grains 111 indicated by imaginary lines exist before the abrasive grains 104. As described above, the abrasive grains 104 and 111 are ground to form relief surfaces 109 and 112 on the same surface.

  On the other hand, when attention is paid to the rake face, the rake face 114 of the abrasive grains 104 and the rake face 115 of the abrasive grains 111 are not aligned. That is, since the sizes, shapes, and positions of the abrasive grains 104 and 111 are different from each other, the rake faces 114 and 115 are not aligned with each other.

In this case, the position of the blade portion between the rake face and the flank face becomes uneven.
However, in recent years, even for the abrasive grains 104 and 111, it is required to align the positions of the blade portions.

  Therefore, in a grindstone provided with a plurality of abrasive grains, a grindstone manufacturing technique capable of aligning the rake face of the abrasive grains is desired.

JP 2001-347453 A

  This invention makes it a subject to provide the manufacturing technique of the grindstone which can arrange | equalize the rake face of an abrasive grain.

In the invention which concerns on Claim 1, in the manufacturing method of the grindstone in which the rake face of the abrasive grain which is a truncated octahedron is arranged in the longitudinal direction of a stand on one surface of a stand, a stand and a plurality of abrasive grains are prepared. process and, provided on the supporting member for supporting the abrasive, and is brought into contact with the abutting portion rake face is formed at an angle of angles formed on the upper surface of the pedestal abrasive, longitudinal multiple abrasive grains of surfaces In accordance with the above, the step of arranging the rake face of the abrasive grains on the same surface and arranging the rake face on the same surface, and the rake face being arranged on the same surface, and bonding the abrasive grains to the table by the plating layer It consists of a process and the process of forming a flank in an abrasive grain.

In the invention which concerns on Claim 2, when bonding an abrasive grain to one surface of a stand through a plating layer, the position of an abrasive grain is positioned with respect to a stand. a support member for supporting tilted Te, this is from the support member extends toward the one surface of the base, in contact with the predetermined surface of the abrasive grains arranged in one side of the platform, on the upper surface of the rake face of the abrasive grains platform And an abutting portion formed at an angle with respect to the angle .
According to a third aspect of the present invention, in the second aspect, the positioning jig is provided in the plating tank. In the plating tank, the base 14, a column that stands from the base 14, and a pin that is connected to the column. And a pivot plate that is supported so as to be pivotable through the horizontal axis and is inclined with respect to the horizontal direction, and a support member is supported by the pivot plate.

  In the method for manufacturing a grindstone according to claim 1, the abrasive grains are bonded to the table by the plating layer in a state where the rake faces are arranged on the same plane. The abrasive grains are bonded to the table by the plating layer with the rake faces arranged on the same plane. By adhering the rake surfaces in a state where they are arranged on the same surface, the rake surfaces of the abrasive grains can be aligned. By using a grindstone with a rake face, the workpiece can be ground uniformly.

  In the abrasive grain positioning jig according to a second aspect of the present invention, a contact portion is provided that contacts a predetermined surface of the aligned abrasive grains toward one surface of the tilted table. By tilting the table, the abrasive grains slide on one surface of the table and roll toward the contact part. The abutting portion is provided at an angle at which a predetermined surface of the abrasive grains contacts. By being provided at an angle at which a predetermined surface of the abrasive grains comes into contact, most of the abrasive grains rolling on one surface of the table have the predetermined surface in contact with the contact portion.

  The grindstone with the rake face aligned can be obtained by adhering the abrasive grains to the base while keeping the predetermined face in contact with the contact portion. By using a grindstone with a rake face, the workpiece can be ground uniformly.

It is a figure explaining the plating apparatus with which the abrasive grain positioning jig was mounted. It is a figure explaining the arrangement | positioning process of an abrasive grain. FIG. 3 is an enlarged view of part 3 of FIG. FIG. 4 is a view taken in the direction of arrow 4 in FIG. 3. It is a figure explaining a flank formation process. It is operation | movement explanatory drawing of the grindstone manufacturing method which concerns on this invention. It is a figure explaining the basic composition of the conventional technology. It is a figure explaining the problem of the prior art.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

As shown in FIG. 1, an abrasive positioning jig 10 according to the present invention is provided in a plating tank 12 filled with a plating solution 11. The abrasive grain positioning jig 10 provided in the plating tank 12 is supported horizontally by a base 14, a support column 15 standing from the base 14, and a pin 16 connected to the support column 15. A rotating plate 17 provided to be inclined with respect to the direction, a supporting member 21 supported by the rotating plate 17 and supporting a grindstone table 19, and an abrasive grain 22 extending from the supporting member 21 toward the table 19. Of the rotating plate 17, the abutting portion 23 that contacts the fixing member 26, the fixing member 26 that is detachably provided on the supporting member 21 via the bolt 24, and fixes the base 19 placed on the placing surface 25 of the supporting member 21 An angle adjusting mechanism 27 for adjusting the tilt angle is included.
Both the support member 21 and the fixing member 26 are formed of an insulator, and are not plated in a subsequent plating process.

  The rotating plate 17 includes a main body portion 29 that supports the support member 21 and the fixing member 26, a connection portion 31 that stands from one end of the main body portion 29 and is connected to the column 15 via the pin 16, and the connection portion 31. And a hole 32 for providing the angle adjusting mechanism 27. The connection portion 31 is prevented from dropping to the near side of the drawing by the retaining member 33.

The angle adjusting mechanism 27 includes a nut 34 welded to the upper surface of the hole 32 of the rotating plate 17 and a bolt 35 screwed into the nut 34 and having a conical tip.
By rotating the bolt 35, the rotating plate 17 rotates. By rotating the rotating plate 17, the inclination angle of the main body 29 with respect to the horizontal direction is adjusted.

  The fixing member 26 is connected to the support member 21 after the base 19 is placed on the placement surface 25 of the support member 21. That is, after mounting the base 19, the fixing member 26 is applied from the side of the support member 21, and these are fixed by the bolts 24. After being fixed, the abrasive grains 22 are arranged on the upper surface 37 of the table 19.

In addition to the abrasive grain positioning jig 10, a nickel plate 38 is provided in the plating tank 12. An anode is connected to the nickel plate 38 and a cathode is connected to the table 19.
How to arrange the abrasive grains 22 will be described in detail in the following figures.

As shown in FIG. 2, a cylindrical guide member 39 is used to accurately place the abrasive grains 22 on the upper surface 37 of the table 19 in the plating solution. The tip of the guide member 39 is opposed to the upper surface 37 of the table 19, and the abrasive grains 22 are dropped into the guide member 39.
The dropped abrasive grains 22 slide on the tilted upper surface 37 of the base 19 and roll. Details will be described in the next figure.

As shown in FIG. 3, the upper surface 37 of the base 19 is also tilted by providing the support member (FIG. 2, reference numeral 21) at a tilt. The abrasive grains 22 that have reached the tilted upper surface 37 of the table 19 slide and roll until the upper surface 37 of the table 19 comes into contact with the contact portion 23.
The bottom surface portion 41 extending from the lower end of the abutting portion 23 is separated from the upper surface 37 of the table 19 by a predetermined distance σ.

  The abutting portion 23 is provided so as to exhibit a predetermined angle θ with respect to the upper surface 37 of the table 19. The predetermined angle θ is the same as the angle formed by the rake face 42 of the abrasive grain 22 for grinding the workpiece with respect to the upper surface 37 of the table 19. An angle formed by the contact part 23 with respect to the upper surface 37 of the table 19 is set to a predetermined angle θ and the table 19 is inclined so that the rake face 42 of many abrasive grains 22 contacts the contact part 23.

A vibration mechanism can be provided in the support member 21. By applying vibration to the table 19 and the abrasive grains 22 via the support member 21, the rake face 42 can be brought into contact with the abutting portion 23 more reliably. Moreover, time until it reaches the contact part 23 is shortened, and the manufacturing work of the grindstone can be shortened.
Thus, the abrasive grains 22 arranged on the upper surface 37 of the table 19 will be described in more detail with reference to the next drawing.

  As shown in FIG. 4, the abrasive grains 22 arranged in the longitudinal direction of the table 19 are arranged in the same direction by the rake face 42 coming into contact with the abutting portion 23. That is, the rake faces 42 are arranged in an aligned state. In particular, when a truncated octahedron is used for the abrasive grains 22, a hexagonal surface having a larger area tends to come into contact with the upper surface 37 and the abutting portion 23 of the table 19.

  Plating is performed in a state where the rake face 42 of the abrasive grain 22 is in contact with the abutting portion 23. That is, the abrasive grains 22 are arranged so that the rake face 42 overlaps in the longitudinal direction, and the plating process is performed in a state where the rake face 42 is arranged on the same face.

  As shown in FIG. 3, by setting the distance from the upper surface 37 to the bottom surface portion 41 of the base 19 as σ, the plating process can be performed while the abrasive grains 22 are in contact with the abutting portion 23. The abrasive grains 22 can be bonded to the table 19 while the rake face 42 is kept aligned.

  As shown in FIG. 5, after the abrasive grains 22 are bonded to the upper surface 37 of the table 19 via the plating layer 45, the table 19 is taken out from the plating solution (FIG. 1, reference numeral 11). Once removed, the abrasive grains 22 are ground to form the flank face 46. By forming the flank 46, the grindstone 50 is completed.

  As shown in FIG. 6A, the upper surface 37 of the table 19 is provided with a plurality of abrasive grains 51 and 52 along the longitudinal direction, and the sizes of the abrasive grains 51 and 52 may be different. However, since these abrasive grains 51 and 52 are plated while being in contact with the contact portion 23, the rake faces 53 and 54 are arranged on the same plane.

  In addition, since the rake faces 53 and 54 are arranged on the same plane and are aligned, the rake faces 53 and 54 are arranged at the same height when the flank faces 56 and 57 are formed. That is, the blade 58 sandwiched between the rake face 53 and the flank 56 overlaps the blade 59 sandwiched between the rake face 54 and the flank 57 when the grindstone 50 is viewed from the longitudinal direction.

  As shown to (b), the workpiece | work 60 can be uniformly ground by using the grindstone 50 by which the height was equalized and the scoop surfaces 53 and 54 were provided on the same surface. It is possible to prevent a difference in the way of cutting in the same workpiece 60. In addition, the difference in grinding accuracy for each grindstone can be reduced.

  In addition, according to the present invention, the abrasive grains 51 and 52 are bonded to the base 19 with the rake surfaces 53 and 54 aligned in advance. Compared with the method of grinding abrasive grains after bonding, the yield of abrasive grains can be increased. A high yield of abrasive grains is desirable because it can extend the life of the grindstone.

  In the embodiment, the abrasive grains are bonded to the table by nickel plating, but any method can be adopted as long as the method can bond the abrasive grains to the table.

  The grinding wheel manufacturing technique of the present invention is suitable for manufacturing a cylinder block grinding wheel.

  DESCRIPTION OF SYMBOLS 10 ... Abrasive grain positioning jig | tool, 19 ... Stand, 21 ... Support member, 22 ... Abrasive grain, 23 ... Abutting part, 37 ... Upper surface (one surface), 42 ... Rake face, 45 ... Plated layer, 46 ... Flank, 50 ... Whetstone.

Claims (3)

In the manufacturing method of the grindstone in which the rake face of the abrasive grain which is a truncated octahedron is arranged on one surface of the table in the longitudinal direction of the table,
Preparing the table and the plurality of abrasive grains;
Provided on the support member for supporting the abrasive, and is brought into contact with the abutting portion rake face is formed at an angle of angles formed on the upper surface of the pedestal abrasive, to follow a plurality of abrasive grains of the surface in the longitudinal direction And arranging the rake face of the abrasive grains on one surface in a state of being provided on the same surface;
In the state where the rake face is arranged on the same surface, the step of adhering the abrasive grains to the table by a plating layer;
Ing and a step of forming a relief surface to the abrasive grains,
Method for manufacturing a grinding wheel, wherein the this. In the abrasive positioning jig for positioning the position of the abrasive grains with respect to the table when the abrasive grains are bonded to one surface of the table via the plating layer,
A support member that supports the table by tilting with respect to the horizontal direction ;
This from the support member extends toward the one surface of the base, in contact with the predetermined surface of the abrasive grains arranged in one surface of the base, the angle of the angle at which the rake face of the abrasive grains with respect to the upper surface of the platform And a contact portion formed on the
Abrasive positioning jig, wherein the this. The positioning jig is provided in a plating tank, and is supported rotatably in this plating tank via a base 14, a support column standing from the base 14, and a pin connected to the support column. The abrasive positioning jig according to claim 2, wherein a rotation plate tilted with respect to the rotation plate is provided, and the support member is supported by the rotation plate.

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