JPS59142068A - Preparation of grindstone for cutting work - Google Patents

Abstract

PURPOSE:To permit a number of thin-edge grindstones having high rigidity and high accuracy to be prepared at one time by immersing a number of base members set onto a base-member installing jig, vertically into a plating liquid containing grinding grains such as diamond and revolving said base members in electric conduction. CONSTITUTION:A carbon tool steel plate having a thickness of 0.05-0.2mm. is worked by the conventional photoetching method so that circular warp or burr is not generated, and about five pieces of base members 3 are installed onto a bed metal installation jig. After the conventional plating foretreatment, the installed base members 3 are set into a plating bath 14 so as to be vertical, and then diamond grinding grains and nickel are codeposited onto the surface of the edge surface and the side surface of the base member 3, and thus a grindstone is formed. Each dispersion in the concentraton degree of diamond and the thickness of this grindstone consisting of five pieces of base members is less, and quality is stable. Therefore, a number of grindstones each of which is thin and has high rigidity can be prepared at one time, and productivity can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a grindstone for cutting hard and brittle materials such as ferrite, ceramics, and crystal.

Structure of conventional examples and their problems In general, the manufacturing method of electrodeposited grindstones for cutting is as shown in FIG.
Abrasive grains are deposited on the composite material 3a placed below the plating solution 2, and after shaking off the excess abrasive grains, an arbitrary current is applied between the anode 4 and the cathode 6 to plate the composite material 3a and polish it. Tie the grains with plated metal. Next, remove the back side 3b of the base material 3 using the base material mounting jig 6, set it on the jig 6 so that the back side 3b faces upward, and then electroplate it in the same way as the front side to make a grindstone. It is. Therefore, since the base material 3 warps due to the plating stress generated during electrodeposition, a thin composite material cannot be used, and a large number of grindstones cannot be manufactured at the same time.

As described above, in the conventional grindstone manufacturing method, only one grindstone can be manufactured at a time, resulting in poor productivity and high grindstone cost.

OBJECTS OF THE INVENTION The present invention eliminates the defects of conventional electrodeposited grindstones and provides a method for manufacturing a large number of highly rigid and highly accurate thin-edged grindstones at one time.

Structure of the Invention The method for producing an electrodeposited grindstone of the present invention comprises a two-tank plating tank, a circulation pump, a cathode drive unit, an anode two composite material mounting jig, etc. By setting the material, immersing it vertically in a plating solution in which abrasive grains such as diamond are suspended, and applying a rotation while applying electricity, it is possible to electrodeposit the end and side surfaces of the composite material at the same time, and even thin composite materials can be electrodeposited. A uniform electrodeposited layer can be obtained, and the grindstone after electrodeposition is less likely to warp, resulting in improved productivity.

Description of examples An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, a carbon tool steel plate having a thickness of 0.06 mm to 0.2 mm is processed into a circular shape by a conventional photoetching method so that no warpage or burrs occur. Next, six pieces of composite material are attached to the alloy attachment jig shown in Fig. 3. The structure of the alloy mounting jig is such that the shaft 7, which also serves as a cathode electrode, is electrically connected to the base material 3 via the contact spring 8 and the electrode plate 9. In addition, the electrodes are all made of resin materials 10, 11, 12, and 13 so as not to conduct electricity from the anode 19 shown in FIG.
Insulated. The exposed part of the shaft is coated with an insulating resist.

□After the composite material attached to the jig is subjected to the usual pre-plating treatment (as shown in Figures 4 and 6), the composite material is placed vertically in the tank and plated. While rotating the material, diamond abrasive grains and nickel are eutectoided on the end and side surfaces of the composite material to form a grindstone.

To describe the structure of the plating tank in detail, it is a two-tank plating tank 16 in which a liquid 14 in which diamond abrasive grains are suspended in a nickel plating liquid is circulated by overflow, and the liquid is circulated via a pump 16 as indicated by the arrow in FIG. The mounting jig for the base material circulating in the direction is attached to the motor 21□ provided outside the tank.
An anode plate 19 which is driven by C rotation is provided perpendicularly to the composite material.

The plating bath composition and electrodeposition conditions were as follows. ' As shown in FIGS. 6 and 7, the diamond concentration and thickness of the grinding wheels obtained as described above have little variation among the six grinding wheels, and the quality is stable. In order to further improve productivity, it is possible to make the plating bath larger, and the abrasive grains can also be used for electrodepositing materials other than diamond, such as cubic boron nitride. Regarding the type of plating, copper, tin, chrome plating, etc. other than nickel can also be manufactured using the same method.

Effect of the invention As described above, the method for manufacturing the cutting grindstone of the present invention is as follows. 0 It is possible to manufacture thin and rigid grindstones.

〇 A large number of grindstones can be manufactured at one time, and the productivity is high because the grindstone thickness and diamond concentration are less likely to vary.

0 It is also possible to change the rotation speed of the grinding wheel and the plating solution circulation speed in order to adjust the abrasive grain size and amount of eutectoid according to the various materials and surface roughness of the cut surface.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of an electroplated grindstone manufacturing apparatus by a conventional method, Fig. 2a is a plan view of the composite material, Fig. 2 is a cross-sectional view of the same, and Fig. 3 is a method used in one embodiment of the present invention. Figure 4 is a cross-sectional view of the two-tank eutectoid plating tank, Figure 5 is an elevation view of the two-tank eutectoid plating tank, and Figure 6 is the grinding wheel thickness. FIG. 7 is a diagram showing variations in the diamond concentration of the grindstone. 3...Material, 1-4...Liquid, 16...
...Two-tank plating tank. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure C (L) <b) Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A circulating method in which a rigid composite material such as carbon tool steel is immersed in an electroplating solution containing abrasive grains such as diamond, cubic boron nitride, silicon carbide, etc., made of metal salts such as nickel and copper. A method for manufacturing a grindstone for cutting, in which a plating solution is circulated or kept stationary in a seed plating tank, and a large number of composite materials are simultaneously rotated to eutectoid plate the end and side surfaces of the composite materials.