JPS62236627A - Device for applying tension to wire electrode for wire cut electric discharge machine - Google Patents

Abstract

PURPOSE:To enable the tension to be adjusted in accordance with an electrode size, by providing a disc type brake, which provides a disc consisting of magnetic material and a permanent magnet able to move in the radial direction along a disc surface, in the case of a wire electrode tension applying device. CONSTITUTION:A disc 1, consisting of magnetic material, is supported by a shaft 2 supporting a bobbin 3 of a wire electrode, while a permanent magnet 5 is supported by an arm 4 so that the permanent magnet 5 is able to rotate under swinging in the radial direction along a disc surface with a supporting point 41 serving as the center. The magnet 5, which generates large brake torque, when the magnet is placed at a position as shown by a broken line in the drawing, while small brake torque when the magnet is placed at a position as shown by a full line, enables the brake torque to be adjusted. Accordingly, predetermined tension can be applied to the wire electrode in accordance with its diameter size by adjusting the brake torque.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a device for applying tension to a wire electrode for a wire-cut electrical discharge machine.

In particular, any of the multiple types of wire electrodes with different diameters
This invention relates to improvements that enable application of desired tension.

[Conventional technology]

It is necessary to apply tension to the wire electrode for a wire-cut electric discharge machine during machining, but the first stage of this tension application has conventionally consisted of a combination of a wire electrode winder and a wire electrode brake. For the brakes,
A non-adjustable brake torque type, such as a mechanical friction brake, or a brake that is difficult to adjust was used.

[Problem that the invention seeks to solve]

Brake torque non-adjustable type, such as wire winder and mechanical brake, or.

In the 'kC' position where tension is applied to the wire electrode for a wire-cut electrical discharge machine that is configured in combination with a brake that is difficult to adjust, the diameter of the wire electrode changes, the bobbin diameter changes, and the tension to be applied changes. When necessary, it is difficult to adjust the tension to a desired value.

The object of the present invention is to overcome this drawback, and to apply tension to a wire electrode for a wire-cut electric discharge machine that can apply a desired tension even when the tension to be applied needs to be changed. The goal is to provide equipment.

[Means for solving problems]

One L stage adopted by the present invention in order to achieve the object listed in L is as follows:
A wire for a wire-cut electric discharge machine is braked by a disc type brake consisting of a disc l made of a magnetic material and a permanent magnet 5 supported so as to be able to move in the radial direction along the blood of the disc l. This is a device that applies tension to electrodes.

[Effect]

The present invention applies when the diameter of the wire electrode changes, the bobbin diameter changes, and the tension to be applied changes.

It is clear that the brake torque should be adjustable in order to be able to apply the desired tension.

Therefore, in the present invention, in order to adjust the brake torque, the permanent magnet is always in contact with or close to the disk, and the position where the brake force is generated can be moved from the axis of the disk.

The brake torque can be changed without changing the magnetic force of the permanent magnet, so that the desired torque can be applied.

〔Example〕

Hereinafter, an apparatus for applying tension to a wire electrode for a wire-cut electrical discharge machine according to an embodiment of Ichiki's invention will be further described with reference to the drawings.

See FIGS. 1a and 1b. FIGS. 1a and ib show the brake torque ITf2g! according to the gist of the present invention. They are a front view and a side view of a magnetic brake.

In the figure, l is a disk made of magnetic material, and shaft 2
The pobbin 3, which is supported by and applies tension to the wire electrode, is rotated. 4 is an arm, and a permanent magnet 5
is supported, and the rotation is t+T 1 m around the support point 41.

When the brake is in the position indicated by the broken line in the figure, the braking torque is large, and when it is in the position indicated by the solid line in the figure, the brake torque is small, and the brake torque is adjustable.

Therefore, if the diameter of the wire electrode is large, adjust it to the position shown by the broken line in the figure, and if the diameter of the wire electrode is small, adjust it to the position shown by the solid line in the figure. The desired tension can be applied regardless of the tension.

〔Effect of the invention〕

As explained above, the device for applying tension to the wire electrode for a wire-cut electrical discharge machine according to the present invention includes a disk made of a magnetic material and a device supported so as to be movable in the radial direction along the surface of the disk. Since a disc-type brake with adjustable brake torque is used, the desired small pressure can be achieved regardless of the diameter of the wire electrode. m sushi + large V sushi (condolence kimata)

[Brief explanation of drawings]

FIG. 1a is a front view of an electromagnetic brake with adjustable brake torque according to one aspect of the present invention. FIG. ib is a side view of an electromagnetic brake with adjustable brake torque according to one aspect of the present invention. l...A disk made of magnetic material. 2.1 vehicle, 3...bobbin, 4...arm, 4111...support point. 5...Permanent magnet.

Claims (1)

[Claims] Braking is achieved by a disc type brake consisting of a disc (1) made of magnetic material and a permanent magnet (5) supported so as to be movable in the radial direction along the surface of the disc (1). A device that applies tension to wire electrodes for wire-cut electric discharge machines.