JP3158519B2 - Manufacturing method of electrodeposited whetstone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an electrodeposition grindstone used for polishing or grinding hard and brittle materials such as ceramics.

[0002]

2. Description of the Related Art An example of a conventional method for manufacturing an electrodeposition grindstone will be described. First, as shown in FIG. 2 (a), an abrasive grain electrodeposited portion 56 of a grindstone base metal 54 having conductivity such as a metal is embedded in a super hard abrasive grain 52 filled in a plating bath 50. In this state, the grindstone base metal 54 itself is used as a cathode,
The grindstone base 54 and the anode 58 are connected to a DC power supply 60. Then, a part of the super hard abrasive grains 52 is electrodeposited on the abrasive grain electrodeposited portion 56 of the grinding wheel base metal 54 by conducting electricity at a predetermined cathode current density for several hours. Next, FIG.
As shown in FIG. 7, this grindstone base metal 54 is immersed in a plating bath 62 not filled with super-hard abrasive grains, and electrodeposited at a predetermined cathode current density for several hours to deposit the super-hard abrasive grains 52 on the electrode. Part 5
The electrodeposited grindstone was manufactured by completely fixing the electrodeposited whetstone 6 to the electrode.

[0003]

However, in the conventional method, it is difficult to uniformly bond ultra-hard abrasive grains such as diamond to the surface layer on the side and bottom surfaces of the wheel base. However, there is a problem that a portion where the particles are firmly fixed is generated, or a portion where the abrasive grains are not fixed at all is generated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it has been proposed that ultra-hard diamond or the like be formed in a large number of grooves uniformly formed on the electrodeposited abrasive grains by an ultrasonic vibration method or the like. Abrasive grains are cooled down and the electrodeposited part of the abrasive grains is cooled, and the super-hard abrasive grains are fixed by the heat shrinkage generated in the electrodeposited part of the abrasive grains, so that the super-hard abrasive grains are uniform on the electrodeposited part It is an object of the present invention to provide a method for producing an electrodeposited whetstone to be electrodeposited on a surface.

[0005]

In order to achieve this object, a method for manufacturing an electrodeposited grinding wheel according to the present invention comprises heating a wheel base having a large number of grooves uniformly formed in an electrodeposited abrasive grain portion. Immediately, by embedding the electrodeposited part of the grinding wheel base metal in a container filled with superhard abrasive grains, applying vibration to the superhard abrasive grains and cooling the electrodeposited part of the abrasive grains, The ultra-hard abrasive grains that have entered the grooves formed in the abrasive electrodeposits are fixed, and finally, the ultra-hard abrasive grains fixed to the abrasive electrodeposits by electroplating or electroless plating. It is manufactured by being fixed.

[0006]

According to the above-mentioned manufacturing method, a large number of super-hard abrasive grains are held in the grooves and are uniformly electrodeposited.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of manufacturing an electrodeposited grinding wheel with a shaft embodying the present invention. First, as shown in FIG. 1A, a grindstone base metal 14 including a shaft portion 9 and an electrodeposited abrasive particle portion 10 is manufactured. The shaft portion 9 is coated with an insulating masking agent (not shown) in order to prevent electrodeposition by plating. A large number of grooves 12 are formed on the surface of the electrodeposition part 10. The width and depth of the groove 12 vary depending on the average particle diameter of the super hard abrasive grains used, but the groove width is almost the same as the average particle diameter or about 5 to 20 μm larger than that, and the depth is It should be about 50% to 80%. As the number of grooves 12 increases, the amount of the superhard abrasive grains fixed increases, so that it may be determined according to the required performance of the grindstone.

In FIG. 1, grooves 12 are formed in an oblique lattice pattern on electrodeposited abrasive grains 10, but the present invention is not limited to this.

Next, as shown in FIG. 1B, the grindstone base metal 14 is placed in a heating device 16 such as an oven,
After heating at about 500 ° C. for several hours, the grindstone base metal 14 is taken out, and is heated in a container of an ultrasonic vibrating device 20 filled with superhard abrasive grains 18 such as diamond as shown in FIG. Immediately bury the electrodeposition part 10 of the abrasive wheel base metal 14. The ultrasonic vibrating device 20 is fixed in a cooling device 22, and the abrasive electrodeposited part 10 in a radiating state oscillates ultrasonic vibration in a container of the ultrasonic vibrating device 20 filled with the super-hard abrasive 18. It is a mechanism that is gradually cooled in the applied state. By applying ultrasonic vibration for about 5 to 10 minutes from the start of cooling, a part of the super-hard abrasive grains 18 enter the grooves 12 formed on the electrodeposited abrasive grains 10 in large numbers. Thereafter, by stopping the ultrasonic vibration and continuing the cooling, the heat contraction effect by the cooling of the abrasive grain electrodeposition portion 10 itself acts, and the abrasive grains entering the groove 12 are completely fixed in the groove 12. . Note that, in addition to diamond, cubic boron nitride, silicon carbide, silicon nitride, alumina, and the like are used for the super-hard abrasive grains. Further, two or more of these may be used in combination.

After the abrasive grain electrodeposition part 10 is completely cooled, the grindstone base metal 14 is taken out, and the abrasive grain electrodeposition part 10 is immersed in the plating solution 24 as shown in FIG. Is fixed to the plating bath 26 as described above, and the electroplating is performed by connecting the grindstone base metal 14 and the anode 28 to the DC power supply 30. As a plating bath, a general watt bath is used as a nickel plating bath, electroplating is performed for several hours at a cathode current density of 0.5 to 5 A / dm ² , and the ultra-hard abrasive grains fixed in the grooves 12 are electroplated with nickel. The target electrodeposited whetstone is completed by being fixed.

As the nickel plating bath, a nickel sulfamate bath may be used in addition to the Watt bath. Further, not only nickel plating but also copper plating or chrome plating can be used.

FIG. 1 (d) shows a method in which ultra-hard abrasive grains are fixed by electrodeposition using electroplating. However, not only electroplating but also ultra-hard abrasive grains are fixed by electroless plating. It is also possible to make it. An example of a method of fixing super-hard abrasive grains by an electroless plating method will be briefly described below.

As described above, FIG. 1E shows a grindstone base metal 14 in which super-hard abrasive grains are fixed in the grooves of the electrodeposited abrasive grains through the steps of FIGS. 1A to 1C. In the electroless plating bath 32 as described above. A liquid stirring device (not shown) is attached to the electroless plating bath 32, and the plating solution is constantly stirred during the electroless plating process. The bath composition of the electroless plating bath is not limited to various types, but one example thereof is composed of 20 g / l of nickel sulfate, 25 g / l of sodium hypophosphite, 25 g / l of lactic acid, and 3 g / l of propionic acid. There is an electroless nickel plating bath adjusted to 0.0 to 5.0. By keeping the electroless nickel plating bath at about 90 ° C. and holding it in the plating bath for several hours, an electrodeposited grinding wheel achieving the above-mentioned object is completed.

FIG. 1D shows an electroplating method, and FIG.
In (e), the method of fixing the super-hard abrasive grains fixed to the abrasive grain electrodeposited portion by the electroless plating method has been described.
It is sufficiently possible to fix the superhard abrasive grains by using both the electroplating method and the electroless plating method. For example, there is a method in which most of the ultra-hard abrasive grains are fixed by an electroplating method, and finally a surface layer is subjected to electroless plating as a finishing treatment.

[0016]

As described above, the electrodeposited grindstone manufactured by the present method can be used to form ultra-hard diamond such as diamond by a method such as ultrasonic vibration in a number of grooves uniformly formed on the abrasive electrodeposited portion. The super-hard abrasive grains are uniformly applied to the electrodeposits of the abrasive grains by inserting the grains and cooling the abrasive grain electrodeposited parts, and fixing the ultra-hard abrasive grains by the heat shrinkage generated in the abrasive grain electrodeposited parts. It is possible to minimize uneven electrodeposition of super-hard abrasive grains, which has been generated by the conventional method, and it is possible to provide an electrodeposited whetstone having extremely high grinding performance.

[Brief description of the drawings]

1 (a) to 1 (e) are explanatory views showing a method for manufacturing an electrodeposited grinding wheel with a shaft according to an embodiment of the present invention.

FIGS. 2A and 2B are explanatory views showing an example of a conventional method for manufacturing an electrodeposition grindstone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electrodeposition part of abrasive grains 12 Groove 14 Grinding wheel base 18 Super hard abrasive grains 20 Ultrasonic vibration device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B24D 3/06

Claims (1)

(57) [Claims] 1. A container in which a grindstone base metal having a number of grooves formed uniformly on an abrasive grain electrodeposition portion is heated and immediately filled with the abrasive grain electrodeposition portion of the grindstone base metal with ultra-hard abrasive grains. Embedded therein, by applying vibration to the ultra-hard abrasive grains and cooling the abrasive grain electrodeposited portions, fixing the superhard abrasive grains that have entered the grooves formed in the abrasive grain electrodeposited portions, Finally, a method of manufacturing an electrodeposited whetstone in which the ultra-hard abrasive grains fixed to the electrodeposited abrasive grains are fixed by electroplating or electroless plating.