JPH0632902B2 - Grooving / cutting device - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a grooving / cutting device, and more particularly to a grooving / cutting device suitable for hard-brittle and non-conductive difficult-to-cut materials.

(Background of the Invention) In recent years, in the cutting of difficult-to-cut materials, a conductive rotary grindstone, which is manufactured by bonding hard abrasive grains such as diamond and borazon with a metal binder, like a metal bond grindstone is used. ing.

The invention of JP-A-58-165926 is, as shown in FIG.
A pulse voltage is applied between the electrically conductive rotary grindstone 103 and the workpiece 1, and the machining liquid 106 is injected into the region where the electrically conductive rotary grindstone 103 is in contact with the workpiece 1 to perform grinding.
Through the conductive rotating grindstone 103 and the work piece 1 to cause an electrolytic action by electric discharge to slightly dissolve the surface of the work piece 1 and cut by the mechanical grinding action by the rotation of the grindstone. It is something that is processed.

However, when the work piece 1 is an electrically conductive material, there is a risk that corrosion or an altered layer may occur on the surface of the work piece 1 due to heat or electrolytic action during discharge, which is suitable for suppressing this. There is a problem that it is difficult to select the appropriate machining liquid 106. Further, for the non-conductive work piece 1, the voltage application conditions for causing the electrolytic action are complicated, and the machining time zone in which the applied voltage is zero is included. There are problems that a power supply device that generates alternating positive and negative AC pulse waveforms is required, and that stable electrolytic action is difficult to obtain.

[Object of the Invention]

The present invention has been made to solve the above problems,
It is an object of the present invention to provide a grooving / cutting device capable of processing a non-conductive and hard-brittle difficult-to-cut material with high accuracy and efficiency regardless of whether or not it has conductivity.

[Outline of Invention]

The present invention has been made to solve the above-mentioned problems, in which a workpiece and a conductive material are arranged in series with a gap therebetween, the conductive material is used as an electrode, and a working liquid is attached to the surface. A characteristic feature is that the conductive rotary grindstone is dressed by applying a pulse voltage between the conductive rotary grindstone and cutting the workpiece and the conductive material alternately and continuously.

Example of Invention

An embodiment of the present invention will be described below with reference to FIG. The figure is a view showing a state after the grooves s1, m1, s2, and m2 have been grooved. A pulse voltage supply device 7 applies a pulse voltage via a brush 4 between a conductive material 2 and a conductive rotary grindstone 3 which are juxtaposed with a workpiece 1 with a predetermined gap.
In order to perform grooving, first, the conductive rotary grindstone 3 is placed on the workpiece 1
Is positioned at the left end P (not shown), and the conductive rotary grindstone 3 is rotated by a power unit (not shown).
The workpiece 1 and the conductive material 2 are fed in the direction opposite to the arrow A, and the groove s1 is cut into the workpiece 1 by the grindstone end face 8a. After the grooving of the groove s1 is completed, the groove m1 is subsequently cut into the conductive material 2 by the grindstone end face 8a and the grooving is performed.

Grooving into the groove m1 is performed while pouring the processing liquid 6 from the processing liquid supply pipe 5 to the portion where the conductive rotary grindstone 3 and the conductive material 2 contact each other, and between the conductive rotary grindstone 3 and the conductive material 2. Since the pulse voltage is applied to the processing liquid 6 as described above,
Through the electro-conductive rotary grindstone 3 and the electro-conductive material 2, and when the groove s1 is machined in the workpiece 1, clogging by the metal binding material which is likely to occur on the end face 8a and the side face 8b is caused by the electrolytic action. The resulting dressing effect is to remove.

Next, the workpiece 1 and the conductive material 2 are moved in the B direction,
Position the conductive rotary whetstone 3 at the left end Q of the work piece 1,
Similarly, the grooves s2 and m2 are grooved.

As described above, according to this method, the grooving of the work piece 1 is 1
Each time the process is completed, the end face 8a and the side face 8b have new abrasive grains appearing on the surface due to the dressing effect, and the grinding force specific to the grindstone is restored. Without this, it is possible to perform grooving and cutting efficiently and with high precision.

The mutual positional relationship between the workpiece 1 and the conductive material 2 is not limited to the case where the conductive material 2 is grooved after the grooving of the workpiece 1 as shown in FIG. As shown in FIG. 2, the grooving of the conductive material 2 may be followed by grooving of the work piece 1, which may be the reverse of the relationship shown in FIG. 1. Further, as shown in FIG. There is also an example in which the conductive material 2 is arranged in the above, and an example in which the workpiece 1 is arranged before and after the conductive material 2 as shown in FIG. 2-c.

INDUSTRIAL APPLICABILITY As described above, in the present invention, in grooving and cutting of a conductive difficult-to-cut material, the non-conductive difficult-to-cut material is not corroded or deteriorated due to generation of heat at the time of discharge or electrolytic action. Even in the grooving and cutting process, the conductive material 2 suitable for the property of the conductive rotary grindstone 3 can be selected regardless of whether the work piece 1 has conductivity or not. By using this as an electrode, a pulse voltage is applied between the conductive rotary grindstone 3 and the conductive material 2, and the workpiece 1 and the conductive material 2 are alternately and continuously grooved and cut to obtain the conductivity. The dressing of the revolving whetstone 3 is performed.

The polarity of the pulse power supply may be positive polarity, reverse polarity, or alternating alternating positive and negative AC pulses.

Next, FIG. 3 is a perspective view of an apparatus according to an embodiment of the present invention, and FIG. 4 is a detailed view of a main part of FIG. 3, in which a grindstone shaft 11, a conductive rotary grindstone 3, a brush 4, and a working fluid supply. Tube 5 and vacuum chuck 13
The workpiece 1 and the conductive material 2 are disposed and fixed so as to be substantially at the same height via an insulating plate 12 fixed on the pulse power supply device 7, the drive control device 7, and the control panel. It is composed of a frame body 14 and the like in which 10 is mounted and stored.

〔The invention's effect〕

By carrying out the present invention, it is possible to perform grooving and cutting of conductive and non-conductive difficult-to-cut materials at the same time as grooving and cutting work without the need to adjust a troublesome gap between electrodes and without requiring a special dressing device. A method and an apparatus for dressing a conductive rotary grindstone with high accuracy and high efficiency are obtained.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention, and FIGS. 2 (a) (b) (c).
Is a schematic view of another embodiment of the present invention, FIG. 3 is an external perspective view of an embodiment of the device of the present invention, FIG. 4 is a detailed front view of the main part of FIG. 3, and FIG. It is a figure. 1 ... Workpiece 2 ... Conductive material 3 ... Conductive grindstone 4 ... Brush 5 ... Machining liquid supply pipe 6 ... Machining liquid 7 ... Pulse voltage supply device 8a ... End face 8b ... Side face 9 ...... Drive control device 10 ...... Control panel 11 ...... Grinding wheel shaft 12 ...... Insulation plate 13 ...... Vacuum chuck 14 ...... Frame body

Claims (1)

[Claims] 1. A conductive rotary grindstone is brought into contact with and moved from a workpiece,
In a cutting device for cutting a workpiece, an insulating plate on which the workpiece is placed, which is below the conductive rotary grindstone, and on the insulating plate, in the cutting direction of the workpiece. Of at least one of the conductive material to be placed in series at a distance, and a working fluid provided above the insulating plate, the conductive rotary grindstone and the workpiece or the conductive material. Machining fluid supply pipe that pours into the part where
A grooving / cutting device for difficult-to-cut materials, comprising: a pulse voltage supply device for applying a pulse voltage between the conductive material and the conductive rotary grindstone.