JPS63180421A - Wire electric discharge machine - Google Patents

Abstract

PURPOSE:To eliminate a belt, serving to transmits a rotation force and to improve workability and maintainability, by a method wherein the drive source of a wire feed roller forms pressure fluid. CONSTITUTION:With a valve 20 opened, a processing solution 19 is injected from an end surface 22 to rotate an impeller 18, and a wire delivery roller 10 connected to the impeller 18 is rotated. When, with this state, the tip of a wire 1 is inserted through a hole 8 and a guide 4 to feed it, the tip of the wire 1 is fed between a bite formed by the rollers 10 and 11, and the wire 1 is delivered in a guide pipe 9. The tip of the wire 1 delivered through the guide pipe 9 is fed between a bite formed by winding rollers 6 and 7 to wind the wire 1. The valve 20 is closed, blow off of the processing solution 19 against the impeller 18 is stopped to complete interconnection of the wires 1. Thereafter, the running speed and the tension of the wire 1 are controlled by means of the winding rollers 6 and 7, wire electrode discharge machining is effected, and the delivery rollers 10 and 11 are forced to perform free-rotation by means of the wire 1 under running.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wire electrical discharge machine, and an object of the present invention is to provide a wire electrical discharge machine that is easy to maintain and has a simple structure.

[Prior art]

FIG. 2 shows the feeding path of the wire 1 in the wire electrical discharge machine.

That is, the wire l wound around the bobbin 2 is guided to the guide 3, positioned by the guides 3 and 4 to process the workpiece 5, and then wound by a pair of winding rollers 6.7.

In wire electric discharge machining, each time the workpiece 5 is replaced, the wire l must be inserted through the machining start hole 8 of the workpiece 5 and the guide 4, and connected to the take-up roller 6.7. However, the path of the wire 1 from the guide 4 to the winding roller 6.7 is not only curved in an L-shape, but also takes up little space and is difficult to connect. For this purpose, the lower part of the guide 4 and the take-up roller 6.7 are connected by a guide tube 9, and the wire 1 is sent out by a pair of delivery rollers 10.11 to facilitate the connection.

Here, the machining tank 12 not only has machining liquid or sludge scattered during machining, but also has a small space. Driven through.

Note that 16 and 17 are the take-up roller 6 and the feed roller 11.
This is a spring for pressurizing the .

[Problem that the invention seeks to solve]

By the way, in the above-mentioned prior art, the bell 15 wears out and must be periodically inspected or replaced.

SUMMARY OF THE INVENTION An object of the present invention is to provide a convenient way to operate a delivery roller that does not require inspection or replacement work.

[Means for solving problems]

In wire electrical discharge machining, pressurized machining fluid is used to remove sludge generated during machining. Therefore, in the present invention, as shown in FIG. 1, an impeller 18 is connected to the delivery row 210, and a spout for the machining fluid 19 is provided opposite the impeller 18.

[For production]

According to the above configuration, since the impeller 18 is rotated by the pressurized working fluid 19, the belt 1 transmitting rotational force
5 is not used, and periodic inspection or replacement of the belt 15 is not required.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows a wire winding device of a wire electric discharge machine showing an example of the present invention. Reference numerals 3 and 20 are pulps, one of which is connected to a machining fluid pump (not shown), and the other connected to a pipe 21. be done. Further, the other end surface 22 of the pipe 21 is connected to the impeller 1
It is facing 8.

The procedure for connecting the shear wire 1 to the take-up roller 6.7 at the start of processing is as follows. First, 1 pulp 20 is opened, and the processing liquid 19 is spouted from the end face 22, and the impeller 18
The feed roller 1 connected to the impeller 18 rotates.
Rotate 0.

Note that the feed roller 10 and the feed roller 11 are meshed with gears (not shown), and the circumferential speeds of the respective wire feeding surfaces are the same.

In this state, when the tip of the wire 1 is inserted through the hole 8 and the guide 4 and fed, the feeding rollers 10.11 catch the tip of the wire 1 and feed the wire 1 into the guide tube 9. Further, the winding roller 6.7 catches the tip of the wire 1 sent out through the guide tube 9, and winds up the wire 1. During processing, the running speed of the wire 1 is increased by the take-up roller 6.7.

In order to control the strength and tension, the pulp 20 is closed when the tip force i of the wire l is bitten by the take-up roller 6.7, or after a certain period of time after being bitten, and the connection of the wire 1 is completed.

Note that the delivery rollers 10 and 11 and the impeller 18 are equipped with bearings (
(not shown). Therefore,
During processing, the pulp 20 is closed as described above, so
The feed rollers 10 and 11 move as the wire 1 runs.
It is turned by the wire l.

Furthermore, by using the pressurized machining fluid used for machining as the fluid that rotates the rollers, there is no need to prepare a special drive source, and the machining fluid for driving is guided to the machining tank via a pipe. Because of this, when using a belt, not only does it require a small space in the living room, but it also has the economical effect of simplifying the structure of the machining tank, including prevention of leakage of machining fluid.

Further, in this embodiment, the working fluid 19 is used to rotate the impeller 18, but it goes without saying that compressed air may also be used.

〔Effect of the invention〕

As detailed above, in the present invention, since the rollers are directly rotated, there is no need for a belt for transmitting rotational force.
There is no need to regularly inspect or replace belts,
This has the effect of improving workability and maintainability.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing one embodiment of the present invention, and FIG. 2 is an explanatory diagram of a conventional example. l...Wire, 4...Wire guide, 6,7.
... Winding roller, 9... Guide tube, 10.11
...Feeding roller, 18... Impeller, 19
... Processing fluid, 20... Pulp.

Claims (1)

[Claims] 1. In a wire electrical discharge machine having a wire feeding device consisting of a wire guide, a wire feeding roller provided on the exit side of the wire guide, a wire take-up roller, and a wire guide tube connecting the rollers, the wire feeding roller A wire electrical discharge machine characterized in that its driving source is pressurized fluid.