JPS6171970A - Diamond grinder element forming method - Google Patents

Abstract

PURPOSE:To finish the tip angle of a grinder element by constituting the angle at the tip of grinder element from discharging electrodes arranged alternately, locating the center of grinder element on the center line of said angle, separating the grinder element at a certain distance, and by discharge-processing the two sides alternately while the separated grinder element is moved along the orientation of the electrodes. CONSTITUTION:A jig 3 is made of an electro-conductive material, and its oversurface is in its longitudinal direction with V-shaped slopes 3a, 3b having a specified angle of 2. One or more parts of discharge electrodes 4a, 4b are installed on said V-shaped slopes in such an arrangement as intersecting but not facing each other, and the specified angle 2 is formed by these electrodes 4a, 4b. The width center of the grinding wheel is located on the center line of this angle formed by the electrodes 4a, 4b, and discharge processing is performed while the grinder element 1 is moved in the direction in which the discharge electrodes are oriented, and the angle 2 is transcripted to the tip of the grinder element 1. Thus the tip of the grinder element can be processed into 2 in high precision.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for electrical discharge machining of a diamond grinding wheel, and more particularly to a discharge force Roe method that can form a grinding wheel tip angle with high precision. ? ... [Background of the invention] How to form a conventional metal pound diamond grinding wheel.

In this method, a grinding wheel and a discharge electrode are placed facing each other at a predetermined distance, and electricity is passed between the two to generate a discharge.

Electrical discharge generates an electric current, generates high heat in the grinding wheel, melts and removes the binder, and forms the grinding wheel into a predetermined shape.

Many machining methods are used.This electrical discharge machining.

The law is Special Publication No. 46-51276. This method.

As shown in FIG. 1, on the discharge electrode 2.

An electrode surface with an angle of 2# to be formed is provided on the grindstone, and the 1'□
Grinding wheels 1 are placed in the center position facing each other with a predetermined distance apart,
A voltage is applied between the grinding wheel 1 and the discharge electrode 2.

The tip of the grindstone 1 is then formed by electrical discharge molding. .

In this method, the shape of the electrode 2 is changed to the grindstone 1 by electrical discharge.

Since it is transferred by hand, it is possible to form a complex grindstone surface. However, the tip and end angle of grinding wheel 1 is 20
In order to achieve this, the angle 2# of the electrode 2 must be accurate. It is very difficult to finish the angle of this electrode 20 to, for example, 0.05 mm or less. Therefore, there is a problem in that it is not easy to set the tip angle of the grindstone 1 to 2#. Also °.

As shown in FIG. 2, the tip of the grindstone 1 was divided.

The angles of the discharge electrodes 2a and 24VCj are alternately formed.

Although it is easy to imagine that this method is not suitable for grinding.

The grinding wheel 1 must be moved so that the stone 1 faces the discharge electrodes 2a and 24 at a predetermined distance. .

When the grindstone 1 is moved, the centering accuracy in the middle direction is poor.

Moreover, there is the problem of poor work efficiency.

[Purpose of the invention]

The present invention improves the above-mentioned conventional technology and forms the tip shape of a diamond grindstone with high precision.

This is an attempt to provide an electric discharge machining method that can

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention includes at least one set of tools for separately correcting the grinding wheel/stone tip angle on a jig having an angle corresponding to the grinding wheel 5 tip angle. Parallel plate-shaped discharge electrodes are arranged in an intersecting manner without facing each other or offset, and the center of the zero grinding wheel is supported by a parallel displacement device with a predetermined interval on the center line of the angle formed by the discharge electrodes,
the.

A jig supporting the grinding wheel and the discharge electrode is moved relative to each other while electric discharge machining is performed to obtain a predetermined angle at the tip of the grinding wheel.

It is to be formed.

[Embodiments of the invention]

Next, one embodiment of the present invention will be explained with reference to FIGS. 3 and 4.

FIG. 3 is a plan view of the electrical discharge machining apparatus used in the present invention.

The side view and Fig. 4 are made using the electrical discharge machining apparatus shown in Fig. 3.

FIG. 1'' In Figures 3 and 4, 1 is a metal-bonded diamond grindstone whose tip angle is to be formed at 20 by electrical discharge machining, 3 is a jig that supports the discharge electrode, and 4a and 4 are the above-mentioned jig A3. A plurality of discharge electrodes are arranged in the discharge electrode.
1 Jig A that supports the discharge electrode 3
3 is conductive.

V-shaped slopes 3α and 34 having a predetermined angle 2# are provided in the longitudinal direction of the upper surface. this.

The discharge is placed on the V-shaped slopes 5a and 54 of the jig 3.

The electrodes 4a and 41 are flattened by a conductive member (for example, M).
2°, 3.

It is formed into a plate shape, and as shown in FIG.
The slopes 3a and 54 of the slopes 3a and 54 are arranged so that they are not opposed to each other, but are crossed at a slight interval (1 rrm).

Arrange one or more sets at least one set (at least one set) and fix them to the jig 3 with bolts (not shown), and as shown in FIG. Place it so that it can be configured.

In such a configuration, in order to form the tip of the grindstone 1 at an angle of 2-degrees, the center position of the width of the grindstone 1 must be
, 44 at a predetermined interval), and the grindstone 1 is set at a speed of about 0.2rff11/346 relative to the directions A and B shown in FIG. While moving, rotate the whetstone 1 so that the side of the whetstone 1 is in the sun.

Connect the jig 3 side to the pole side and the cathode side between the two.

■ For example, voltage 100. Electric discharge machining is performed by applying a pulsed power supply with a pulse width of jO#j and a pulse interval of 1°20#. .

During this electrical discharge machining, use tap water or insulation at the discharge point.

While applying processing fluid such as oil, as shown in Fig. 4.

The 1tL side of the grindstone 1 is alternately melted and removed from the 1tL side of the grindstone 1 by the discharge electrode 44°, and the grindstone is removed.

4.

1 is formed at a predetermined angle 2#. 'Thus, in the present invention, the discharge chamber is formed so as to have the angle 2- formed at the tip of the grindstone 1.'

The poles 4a, 44 are arranged alternately, and the discharge electrodes 4a, 4-
Position the middle center of the whetstone on the center line of the angle formed by 6-'.
□ and then move the grindstone 1 in the direction of the arrangement of the discharge electrodes.

Because it is a method of electrical discharge machining while moving, it is a grindstone.

A predetermined angle 2# can be transferred to the tip of 1.

Ru. Further, although the discharge electrodes 4a and 44 are subject to wear due to discharge, since the electrode surfaces are flat, such wear can be repaired simply and easily.

〔Effect of the invention〕

As described above, the diamond grindstone of the present invention.

In this forming method, the angle to be formed at the tip of the whetstone is formed by alternatingly arranged discharge electrodes, the center of the whetstone is located on the corner/charcoal center line, and the whetstones are spaced apart by a predetermined distance. Since this method performs electric discharge machining alternately on both sides while moving the electrodes in the direction of arrangement, it has the effect of finishing the grinding wheel tip angle with high precision, and also makes it easy to repair worn electrodes. And it's easy to do, and it's effective.

[Brief explanation of the drawing]

FIGS. 1 and 2 are front views showing an example of grinding wheel tip electric discharge machining by a conventional method, and FIG. 3 is a plan view showing an arrangement of discharge electrodes according to the present invention. FIG. 4 shows a grindstone using the discharge electrode shown in FIG. FIG. 3 is a front view showing a method of electrical discharge machining. 1...
[Stone ja, 1J...processed surface. 3... Jig that supports the electrode 11f4
a, 44...Discharge electrode 2#...Wheelstone tip angle. No. 4 Second country development 1

Claims (1)

[Claims] In a method of forming the tip of a diamond grinding wheel at a predetermined angle by electric discharge machining, at least one or more parallel sets are placed on a jig having a predetermined angle corresponding to the grinding wheel tip angle to correct the grinding wheel tip angle separately on the left and right sides. Plate-shaped discharge electrodes are arranged so as to cross each other without facing each other, and the center of the grinding wheel is supported by a parallel movement device with a predetermined interval on the center line of the angle formed by the discharge electrodes, and the grinding wheel and the discharge electrode are supported. A method for forming a diamond whetstone, which comprises forming the tip of the whetstone at a predetermined angle by performing electrical discharge machining while moving the jig relative to the diamond grindstone.