JPS6048220A - Wire-cut electric discharge machine - Google Patents

Abstract

PURPOSE:To simplify structure and improve reliability on electricity supply, by providing the pipe guide with an inlet and an outlet for cooling water to cool an electricity supplying member which supplies electricity to a wire electrode within the pipe guide. CONSTITUTION:An electricity supplying member 70 for supplying electricity to a wire electrode 10 is provided within the pipe guide 64 in which the wire electrode 10 is inserted. An inlet 74 and an outlet 75 for cooling water are provided in the pipe guide for cooling the electricity supplying member 70. By the described arrangement, the need for providing the pipe with cuts for electricity supply and cooling the electricity supplying member 70 and the need for the opening and closing mechanism for the electricity supplying member at upward and downward movement of the pipe have been eliminated, and thus, the structure has been simplified and the electricity supply is ensured and reliability thereon has been improved. If the thickness of the work is varied, the position of the pipe guide can be adjusted according, and therefore, machining with higher accuracy is made possible. Besides, since the pressure of the working fluid can be increased, machining at higher speeds is also made possible.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a wire-cut electrical discharge machining apparatus, in particular, to kite a wire electrode in a machining area using a kite with a nob structure.
[Prior art] Conventionally, as this type of equipment, wire cut electrical discharge machining with an automatic wire feeding mechanism that automatically inserts and supplies wire electrodes is related to machining, wire force, and somatic electrical discharge machining equipment. Figure 1 schematically shows the state of the above conventional equipment during processing.
The symbol aO in the figure is a wire electrode, @ is the workpiece, and α◆ is the T cowire electrode aO drilled in the workpiece.
This is the initial hole through which the wire electrode QQ is passed, and this workpiece (2) is driven by another drive device (not shown).
is driven in the X and Y directions.

00 is a pipe guide, into which the wire electrode OG is inserted, and a die guide (to) for guiding the wire electrode 0 (1) in the processing area is provided at the tip.

The handle is a die guide that guides the lower wire electrode QO, and is attached to the upper end of the lower kite (A). (C) is a feeder that supplies machining energy from the power source (E) to the wire electrode QCI. , which is formed in the pipe guide OQ and is configured to pass through the pipe cutout (T) and come into contact with the wire electrode QG. (To) is a feeder similar to the feeder (C) above, and is attached to the lower guide (A).

(a) and c34 are upper and lower nozzles that spray machining fluid (to) into the electrical discharge machining area between the wire electrode head and the workpiece (a). This is a bearing that guides the C@tw pipe car 4do00. 2, (6) is the nozzle (A), ■ is the processing liquid (To)
This is the machining fluid inlet that supplies the machining fluid. @4 is pipe kite 0
This is a pinch row that sends the wire electric current 8irm to the lower guide tS@ through 0, and is attached to the upper part of the pipe guide θ0. , (g) is a motor that moves the pipe kite M upward and downward Cζ along the guide rod Q by means of a feed screw and a slider - above this pipe kite 00.

By moving down the wire electric ai (in the lower kite (a)
・It makes it easy to insert the wire of ＼. , (Incorporated) is the force/tumble that cuts the wire electrode 01, and the wire electrode is cut after the pipe guide αG is lifted up to the top of the tip by the motor (11'11). , the fourth is sent by the lower kite (c) and is 1
This is a roller that pulls and tensions the wire electrode QO, and is configured so that one roller (2) is stretched around a belt and one roller (2) is connected to the roller, and one motor 6'4 sends out the wire electrode (aO7F) to the outside. Sleeping.

Figure 2 shows the wire electrode 01 of the above-mentioned conventional device being connected to the lower guide (
This figure shows the operation when feeding to (a), and shows the state in which the pipe guide OQ is not driven by the drive motor θQ to the lower guide through the initial hole Q41. , the feeder (c) is a driving source C (not shown) so that pi can drive the guide αG.
Therefore, the pipe guide aO cannot be opened in the direction of the arrow Cζ. Figure 3 shows the operation when cutting the wire electrode 01 in the conventional device described above.
(b), and the cutter is driven in the direction of the arrow by a drive source (not shown) to cut the wire electrode 01.

Above (1.lt in 71 conventional devices, feeder (c) feeding power to wire electric aiiiac+ in pipe guide αQ)
When driving the pipe kite OQ in the upper and lower directions ζζ, and during machining (ζ), it is necessary to open and close it, and for that purpose a mechanism is required, and the slight difference between the wire electrode α1 and the feeder (c) is required. (It is necessary to adjust the contact, so in addition to these, add 14 wire electrodes (llfζ) to the pipe guy 1:0Q, and a pipe notch (c) for cooling the wire electrode (llfζ) and the feeding electron (c). Is it necessary to provide the pipe guide 061? This has the disadvantage that the pipe kite 061 becomes weak in strength.Furthermore, in this conventional device, the position of the pipe guide 00 at the time of machining is determined. Therefore, when the plate thickness of the workpiece α2 changes Ly, it is not possible to change the position of the pipe kite OQ to the optimum position according to the plate thickness. When increasing the pressure of the machining fluid (to), the machining fluid enters from the notch (to) and passes through the pipe guide and is ejected from the top of the pipe guide.
Attachment +r affects 7H2, making high-speed machining impossible.

[Summary of the invention]

This invention IJ is to solve the problems of the previous 171 points, and its purpose is to provide a feeder for feeding power to the ζ wire electrode inside the t1 vibe guide, and to Add cooling water to the pipe guide during cooling.
By providing a cooling water inlet and outlet, the IR switch for the feeder like in conventional equipment is not required, increasing the rigidity of the pipe kite and reducing the contact resistance between the feeder and the wire electrode.
< Improve the reliability of wire power supply 17th. The contact position between the wire electrode and the power supply can be changed at the will of the operator, and it is also possible to change the thickness of the workpiece during machining. By adjusting the position of the pipe kite accordingly, it is possible to increase the machining fluid pressure to enable high-speed machining, thereby providing a pipe guide type wire-cut electrical discharge machining apparatus.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. In Fig. 4, the same reference numerals as in Figs. 1 to 3 are the same, and corresponding parts are indicated by O). Reference numeral 6◆1, f pipe guide, ring is fed by the pipe kite and screw can. The +70 rt pipe is installed inside the pipe chi 1←◇, and there is a wire contact hole inside. Q5 is the cooling water inlet into which the machining fluid (c) flows in, and Q5 is the cooling water outlet.
r, wire warm O) supply'N, j; r, power supply (a)
From the bearing (to), through the pipe guide and the feeder wire, wire press (70 is a wire electrode 00) is eccentrically centered from the center of the pipe guide and brought into contact with the side of the hole in the feeder wire. Powered by 8 ma, 1 machining fluid (to)
The cooling water population Q→, the cooling water escapes to the cooling water outlet (719) through the wire insertion hole of the feeder wire and wire press (c), and the wire electrode 01 of the current-carrying part can be cooled.
In the figure, the pinch roller is 0, and the motor Qf9. There is no need to worry about cooling water splashing on devices such as feed screw decoys, and the cooling water inlet C! By making the inlet of 4 smaller according to the machining fluid pressure, the inlet hole shape of 11 (for example, in the case of 5#/d, the shape of the inlet hole is φ0.4
1182 locations) High-speed machining is possible.

Fig. 5 shows an example of the application of the T-shaped machining made possible by this invention. In this case, the plate thickness Cζ of the workpiece 0 has a step difference of 6ζ as shown in the figure, but since the pipe blade C4 can be lowered near the top surface of the workpiece Oa for processing, the wire tit in the processing area The distance between the die skies that make up the poles (Ifl) can be set to the minimum, and therefore highly accurate machining is possible.

In the above embodiment, the present invention was applied to an automatic wire feeding device in which the pipe guide is driven upward and downward (ζ), but it can also be applied to an ordinary wire-cut electric discharge machining device in which the pipe guide is fixed and used. The present invention can also be applied to a system in which the feeder Q1 is built into a fixed pipe kite ring, and a cooling water inlet hole Q→ and an outlet hole Q0 are provided in the pipe guide for cooling. [Effects of the Invention] As stated above (1) and (2), this invention provides a pipe guide through which a wire electrode is inserted, and a feeder for supplying power to the wire electrode. By providing cooling water inlet and outlet holes in the cooling pipe guide, there is no need for a pipe notch in the T-hole for feeding power and cooling the feeder, and a mechanism for opening and closing the feeder by moving the pipe up and down. The structure is simplified,
It has the same effect as the reliability and reliability of power supply, and even if the thickness of the workpiece changes, the position of the pipe kite can be set accordingly, allowing highly accurate machining. By making it possible to raise the machining hydraulic pressure, high-speed machining is possible.

[Brief explanation of drawings]

Fig. 12 is a schematic diagram of a conventional wire-cut electrical discharge machining device with an automatic wire feeding device, Fig. 2 is a schematic diagram showing the operation status of a pipe kite of λ when a wire electrode is fed by the conventional device, and Fig. 8 is a conventional diagram. FIG. 4 is a sectional view of a pipe kite showing an embodiment of the present invention, and FIG. 5 is a schematic diagram showing an example of an operational application of an embodiment of the present invention. It is. θ1 is the wire electrode, the ring is the pipe guide, the slope is the feeder, and t
14th cold cooling water inlet hole 17 o'clock is the cooling water outlet hole. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Masuo Oiwa Figure J Figure 3 Figure 4

Claims (1)

[Claims] A wire-cut discharge characterized in that a feeder for supplying power to the wire electrode is provided in a pipe guide into which a wire electrode is inserted, and an inlet hole and an outlet hole for cooling water are provided in the pipe guide. Processing equipment.