JPS6215021A - Electric discharge machine - Google Patents

Abstract

PURPOSE:To make drill grooving by means of electro-discharge machining performable without using a grindstone as well as to aim at improvement in productivity, by machining a drill groove with a disclike copper electrode being tilted as far as the specified angle for forming. CONSTITUTION:A drill 3 being attached to a tip end of a turning gear 2 is subjected to servo feed in a Z direction as being rotated in an (m) direction by a servo head 1 and the turning gear 2. And, an electrode 6 is rotated at high speed in an (n) direction by a high-speed turning gear 4, and subjected to the servo feed in a (y) direction by a linear feed device 5. Here, since an incline of the electrode 6 is set in a manner conformable to a tilt angle theta of a groove in the drill 3, this drill groove is formed by means of electro-discharge machining. Thus, the electro-discharge machining takes place with inexpensive copper electrode, without using expensive grindstone so that productivity in drilling forming is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric discharge machining apparatus for forming a drill.

[Conventional technology]

FIG. 3 is a configuration diagram showing a conventional processing device for forming a drill using a grindstone. In the figure, (3) is a drill to be formed, (111m is a grindstone, αυ is a rotating device that rotates the grindstone αG in the direction of arrow (n), and α is a rotating device that rotates the drill (3) in the direction of arrow (n).
(e) A rotating device for rotating the drill in the direction (e), α■ a reciprocating device for linearly moving the drill rotating device a3 in the direction of arrow (a), I a cutting device for the grindstone a1, and a9 the grinding machine body.

Now, the grinding surface of the whetstone QCO and the drill (3) are arranged to match the helix angle (θ) as shown in the figure, and are rotated at high speed in the direction of the arrow (n) by the rotating device. Further, the cutting depth of the drill (3) is set by the cutting device α1-. On the other hand, the drill (3) to be formed is rotated in the (e) direction by the rotating device α and the reciprocating device 0, while the drill (3)
) direction, and by repeating these movements, the groove of the drill (3) is formed ◇ [Problem to be solved by the invention] Conventionally, grinding using this type of grindstone In the case of molding method,
Since the material of the drill is extremely hard, the grinding wheel is subject to severe wear, which necessitates frequent dressing and replacement of the grinding wheel, which poses a problem in improving productivity.

This invention was made to solve the above-mentioned problems, and its object is to form a drill groove by electrical discharge machining.

[Means for solving problems]

This invention uses a disc-shaped steel T! instead of a grindstone. ! , using poles and making it possible to form ditril grooves by electrical discharge machining.

[For production]

Electric discharge machining is performed between the drill and the copper electrode, which is inclined at an angle of () with respect to the axis of the drill to be formed, thereby forming the ditrile groove.

[Embodiments of the invention]

Hereinafter, the configuration diagram of FIG. 1 showing one embodiment of the present invention will be explained. In Figure 1, (1) is a servo head, (2) is a rotating device with a rotating servo function, (3) is a drill attached to the tip of this rotating device (2), (
4) is a high-speed rotation device, (5) is a linear feed device with a linear servo function, (6) is a copper electrode attached to the tip of the high-speed rotation device (4), (the force is applied to the processing table, 8) is a machining tank, and (9) is a machining fluid stored in the machining tank (8).

FIG. 2 is an explanatory diagram showing the relative relationship between the drill (3) and the electrode (6). A drill (3) attached to the tip of the rotating device (2) is servo-fed in the (z) direction by the servo head (1) and the rotating device (2) while rotating in the (forward) direction. In addition, the electrode (6) is connected to a high-speed rotating device (4).
The roller is rotated at high speed in the (n) direction, and is servo fed in the (y) direction by a linear feeder (5). Here, adjust the inclination angle of the groove of the drill (3) to the electrode (
6) Since the inclined surface is set, the drill groove is formed by electrical discharge machining. It goes without saying that this molding process is carried out in 9) using the processing fluid in the processing tank (8) to which the processing table (7) is attached.

In the above embodiment, the electrode (6) was rotated at high speed, but it is of course possible to use this rotating machine without rotating the electrode, as long as the type of rotating machine is determined by the processing conditions.

Further, in the above embodiment, machining was performed by electric discharge, but it is also possible to form by electrolytic machining.

〔Effect of the invention〕

As described above, according to the present invention, since electrical discharge machining is performed using an inexpensive copper plate electrode without using an expensive grindstone, the productivity of drill forming is greatly improved.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing an apparatus for forming a drill by electrical discharge machining according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing the correlation between the drill and the electrode, and Fig. 6 is a diagram showing the construction of a drill using a conventional grindstone. FIG. 2 is a configuration diagram showing a processing device. In the figure, (1) is the servo head, (2) is the rotating device, and (3) is the servo head.
) is a drill, (4) is a high-speed rotating device, (5) is a linear reciprocating device, (6) is an electrode, (7) is a processing table, (8) is a processing tank, (9) is a processing fluid, (Ql is Whetstone, α1) l-1
The rotating device for the grindstone, α2 is the rotating device for the drill, α country is the linear reciprocating device, αa is the grindstone cutting device, and (I5) is the grinding machine body. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Patent Attorney Tadashi Sato Figure 1

Claims (1)

[Claims] In an electrical discharge machining device that processes the workpiece by generating electrical discharge between opposing electrodes and the workpiece, a drill groove is formed and machined using a disc-shaped copper electrode tilted at a predetermined angle. Electrical discharge machining equipment characterized by: