JPS62203722A - Wire cut electric discharge machine - Google Patents

Abstract

PURPOSE:To high accurately guide an electrode so as to improve machining accuracy, by providing an air gap, which inserts a guided wire electrode, in a supporting arm while a conveying belt or a conveying roller, which automatically introduces the wire electrode to be conveyed, in said air gap. CONSTITUTION:An arm 1 forms in its inside an air gap in the lengthwise direction, here a wire electrode 2 is inserted. A guide roller 5 is arranged just below a guide 3, and conveying belts 6, 7 are provided along the air gap in the arm 1. The belt 6, which is mounted to be bridged between rollers 8, is driven by a motor 10. While the belt 7 moves between the roller 5 and rollers 9. The moving belts 6, 7, linked over the upper and bottom point end rollers, rotate moving being brought into frictional contact, and a point end of the wire 2, lowering penetrating through the guide 3, is forced to be attached while being rolled in between the belts 6, 7, thus the belts 6, 7, which move by driving the motor 10, drive the wire electrode 2 to be conveyed in the rightward direction of an arrow head in the drawing. In this way, torsion, flection, etc. of the arm 1 itself can be surely prevented by strong tension of the electrode 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a wire-cut electric discharge machining apparatus that performs electric discharge machining using a wire electrode.

[Prior art]

The running path of the wire electrode in the conventional device is as shown in FIG. I'm trying to move it along.

The upper arm and the lower arm are the same, and the upper and lower guides 3
The object to be machined is placed opposite the wire electrode 2 that moves with the required tension and speed between the two, and is machined by pulsed discharge while supplying machining fluid.

〔problem〕

The wire electrode 2 is continuously supplied from a reel (not shown), and is controlled by a brake and a drive roller along the way so that it runs between the upper and lower guides 3 with the required tension and speed.

As for the wire diameter of the wire electrode 2, a thin wire with a diameter of about 0.05 to 0.3 mm is used, but depending on the case, a thick wire with a diameter of about 0.51111 or more may be used. □ Strong tension is applied to such wire electrodes to prevent them from breaking, bending, bending, photographing, etc., but as shown in Figure 2, guide them along the sides of arms and arms 1 and apply strong tension to them. As a result, the arm 1 is twisted, bent, and distorted, and the precision with which the wire 2 is guided to the tip of the arm changes. This variation error in the guide directly affects the machining accuracy and has the drawback of reducing the machining shape accuracy.

[Means for solving problems]

The present invention was proposed to improve these points,
The present invention is characterized in that a gap is provided in which the wire electrode to be guided is inserted into the support arm, and a conveyance belt or a conveyance roller of a device for automatically introducing and conveying the wire electrode into the gap is provided.

[Practical example]

The present invention will be described below with reference to an embodiment of the drawings. In FIG. 1, a gap is formed in the length direction inside an arm 1, and a wire electrode is inserted through the gap.

5 is a guide roller arranged directly below the guide 3, 6 and 7
is a conveyor belt installed along the gap between the arms, and belt 6
is passed between rollers 8.8 and driven by a motor 10. The belt 7 also moves between rollers 5 and 9.9.

The movable belts 6.7 hung on the upper and lower tip rollers move and rotate due to contact friction, and the tip of the wire 2 passing through the guide 3 and descending is wrapped between the belts 6.7 and crimped to drive the motor 10. The wire electrode 2 is conveyed and driven in the right arrow direction by the movement of the belt 6.1. The belt 6.
It is preferable that the cavity in the arm through which the arm 7 is inserted is provided at the center of symmetry of the entire arm 1, thereby reliably preventing the arm itself from twisting, bending, etc. due to the strong tension of the wire electrode 2.

Incidentally, the above arm 1 through which the wire electrode 2 is inserted can be formed on the upper arm as well as the lower arm.

(Effects of the Invention) As described above, the present invention forms a gap in the length direction in which a wire electrode is inserted in one or both of the upper and lower arms,
A belt conveyor, roller conveyor, or other arbitrary conveyance device is installed to introduce and convey the wire electrode passing through the guide, so the wire electrode can be inserted and stretched into the arm automatically. It is simple and easy to guide and move.

By guiding the wire electrode into this arm,
It is possible to prevent twisting and bending of the arm, and it is possible to guide the wire electrode at the tip of the arm stably and with high precision, which improves shape accuracy, corner accuracy, and
Machining accuracy such as parallelism (amount of chiseling) and groove width can be improved.

Further, when the wire electrode is exposed outside the arm as in the conventional case, it is dangerous and may cause a short circuit accident, but by inserting the wire electrode into the arm, a safe device can be provided.

[Brief explanation of drawings]

FIG. 1 is a partial structural diagram of an embodiment of the present invention, and FIG. 2 is a structural diagram of a conventional device. 1...Arm 2...Wire electrode 3...Guide 4...Guide roller 5... ......Guide roller 6.7...Moving belt 8.9...Belt roller 10...
... Drive roller patent applicant: Kiyoshi Inoue, representative of Inoue Japax Institute Co., Ltd. (1) Amend the scope of claims in the specification as shown in the attached document 1. Indication of the case 1986 Patent Application No. 45,704 2 Name of the invention Wire-cut electric discharge machining device 3 Relation to the case by the person making the amendment Patent applicant Address 5289 Michisho, Nagatsuta-cho, Midori-ku, Yokohama-shi, Kanagawa Prefecture 4. Number of inventions increased by amendment "0" 5. Subject of amendment Separate columns for claims and detailed explanation of invention in the specification Paper 2) "Creating a gap" on page 3, line 13 of the same Insert ``that, furthermore'' after . (3) Insert "insulated" next to "inside the arm" on page 5, line 14. In a wire-cut electric discharge machining device, a wire electrode is moved between guides with a required tension and speed, and the wire electrode between the moving guides is subjected to electric discharge machining while facing a workpiece.
A wire-cut electrical discharge machining apparatus characterized in that a gap is provided in the arm through which a wire electrode to be supplied to the guide, taken out, or both is inserted, and the wire electrode is inserted into the gap. ”

Claims (3)

[Claims] (1) Wire cutting in which a guide is provided at the end of the upper and lower arms, a wire electrode is moved between the guides with the required tension and speed, and the wire electrode between the moving guides is electrically discharged facing the workpiece. In the electrical discharge machining apparatus, a gap is provided in the arm through which a wire electrode to be supplied to the guide, taken out, or both is inserted, and a device is provided for automatically introducing and conveying the wire electrode into the gap. Wire cut electrical discharge machining equipment featuring: (2) A wire-cut electric discharge machining apparatus according to claim 1, which is provided with an introduction and transfer device consisting of a moving belt. (3) The wire-cut electrical discharge machining apparatus according to claim 1, which is provided with an introduction and transfer device consisting of rotating rollers.