JPS6339729A - Wire electrode guide device - Google Patents

Abstract

PURPOSE:To form a three-dimensional curvature with high precision efficiently by furnishing a device, which bears an electrode guide body freely to move in the direction right across the axis of rotation of said electrode guide, body and a machining radius control device which moves the electrode guide body relative to the axis of rotation of the electrode guide body. CONSTITUTION:A wire electrode 1 is stretched in approx. U form along the edge of an electrode guide piece 4. Motors 17, 14 and 23 are controlled by a control device 28, and an electrode guide body 2 is rotated round a rotary shaft 16. Relative movement is made with respect to an object to be fed for machining in the X-Y direction while feed of machining is made in the Z-axis direction and desired machining is made. To process corners etc. of each cavity of a die, a motor 23 is started with a control device 28, and said electrode guide body 2 is moved in the direction right across said rotary shaft 16, to make setting of the processing radius of rotation to a specified value, and further the angle of inclination of the wire electrode 1 is set to a specified value followed by rotation round the rotary shaft 16. Thus a cone or a cylinder is formed on the object to be machined.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a wire electrode guide device equipped with an electric guide body that guides a wire electrode in a substantially U-shape.

[Conventional technology]

Conventional wire electrode guide devices of this kind usually include an electrode guide for guiding the wire electrode in a substantially U-shape, a device for rotatably supporting the electrode guide, and a wire electrode for supplying the wire electrode to the electrode guide. , a collection device, and
The wire electrode running through the electrode guide portion enables electrical discharge machining such as die carving of bottomed holes in the workpiece.

However, in this type of wire electrode guide device,
By rotating the electrode guide under NC control and processing and feeding in the Z-axis direction, and processing and feeding the workpiece relatively in the X-axis and Y-axis directions, die-sinking processing could be performed. However, with this method, for example, when machining the corners of a mold cavity, the control is complicated, a smooth finished surface cannot be obtained, and high precision and high efficiency machining cannot be performed. there were.

(Problems to be Solved by the Present Invention) The present invention has been made from the above viewpoints, and
The purpose of this is a wire electrode guide that can freely create three-dimensional curved surfaces with high technical precision and high efficiency, and can obtain a smooth finished surface even in the corners of mold cavities, for example. The goal is to provide equipment.

[Means for solving problems]

The above object is to provide the wire electrode guide device with a device for movably supporting the electrode guide in a direction orthogonal to the central axis of rotation of the electrode guide; This is achieved by providing a machining radius control device that moves the electrode guide relative to the rotation center axis.

[For production]

By configuring as described above, the machining radius can be controlled by moving and rotating the electrode guide in a direction perpendicular to the central axis of rotation. Corners etc. can be processed to give a smooth finished surface.

〔Example〕

Hereinafter, details of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is an explanatory diagram showing an embodiment of a wire electrode guiding device according to the present invention.

In FIG. 1, ■ is a wire electrode, 2 is an electrode guide, 3 is an electrode guide plate, 4 is an electrode guide, 5 is a supply reel for the wire electrode 1, 6 is a collection reel, 7 is a power supply roller, 8 1 is a brake roller, 9 is a capstan, 10 is a pinch roller, 11 is a column, 12 is a guide rail attached to the column 11, 13 is an arm that moves up and down along the guide rail 12, and 14 is its Z 15 is a housing for rotatably supporting the electrode guide 2; 16 is a rotating shaft; 17 is a rotating motor whose output shaft is connected to the rotating shaft 16; 18. 19 is a bearing, 20 is a collar, 21 is a receiving plate, 22 is the rotation shaft 16
23 is a moving motor provided on the cylindrical body 22, 24 is a feed screw thereof, and 25 is a guide attached to the casing 22. Rail, 26 is the above guide rail 25
A support 27 is attached to the support 26 and is moved along the electrode guide body 2, and a nand 28 is a control device that meshes with the feed screw 24.

The wire electrode 1 is supplied from the supply reel 5 provided on the electrode guide body 2, passes between the power supply roller 7 and the brake roller 8, is guided in a substantially U-shape by the electrode guide 4, and is connected to the cap. It is pulled out by the stun 9 and pinch roller 10 and wound onto the recovery reel 6, but during that process,
Power is supplied by a power feed roller. Furthermore, the positions of the power supply roller 7, brake roller 8, capstan 9, and pinch roller 10 can be changed in each combination state, and the U-shaped inclination angle of the wire electrode formed with the electrode guide 4 can be set. .

The electrode guide 4 is provided at the tip of the electrode guide plate 3, and is guided so that a part of the outside of the wire electrode 1 is exposed at the contact portion of the electrode guide 4 with the wire electrode l. 1 along the edge of the electrode guide plate 3 in a substantially U-shape.

The arm 13 is moved to the column 1 by the Z-axis bending remoter 14.
It is configured to move freely up and down along a guide rail 12 attached to 1.

The housing 15 is provided at the tip of the arm 13, and has a rotating shaft 16 rotatably supported therein via bearings 18, 19, and is rotated by a motor 17. It is composed of

A device for movably supporting the electrode guide 2 in a direction perpendicular to the rotation center axis of the electrode guide 2 is provided at the lower end of the rotation shaft 6.

In this device, a housing 22 is attached to the lower end of the rotating shaft 16, a motor 23 is provided at one end of the housing 22, and an output of the motor 23 is provided inside the housing 22. A feed screw 24 connected to the shaft and a support 26 moving along a nut 27 and a guide rail 25 are provided.

The electrode guide 2 is provided at the lower end of the support 26,
The rotation of the motor 23 causes the feed screw 24 and the nut 2'7 to
When the support 26 moves along the guide rail 25 via the support 26 , the electrode guide 2 moves relatively in a direction perpendicular to the central axis of the rotating shaft 16 . The radius can be changed and set as appropriate.

The control device 28 is controlled by a numerical control device or the like according to a predetermined program, and controls the motor 14.
The electrode guide body 2 is raised and lowered by controlling the motor 17.
The electrode guide body 2 is rotated about the rotation axis 16 as a central axis. At this time, the motor 23 is controlled to move the electrode guide body 2 relative to the rotation center axis to adjust the machining radius. can be changed and set as appropriate.

Although not shown in the figure, a device for processing and feeding the workpiece in the X-axis and Y-axis directions is also controlled by the control device 28.

When processing, the wire electrode 1 is stretched in a substantially U-shape along the edge of the electrode guide 4, and the motors 17, 14 and 23 are controlled by the controller 28, and the motors 17, 14 and 23 are rotated. The electrode guide body 2 is rotated around the moving shaft 16 and processed and fed in the Z-axis direction, which is referred to as XY in the figure.
A desired process is performed by moving the workpiece relative to the workpiece that is being processed and fed in the direction. At this time, the workpiece is brought close to the workpiece that is submerged in the machining fluid so that a predetermined machining gap is formed between the wire electrode 1 and the workpiece, and the power supply of the wire cant electric discharge machining apparatus is activated. Of course, an electrical discharge is generated in the machining gap formed between the wire electrode 1 and the workpiece.

For example, in order to process a corner of a mold cavity, the control device 28 operates the motor 23 to move the electrode guide 2 in a direction perpendicular to the rotation axis 16 to change the machining radius of rotation. After setting the inclination angle of the wire electrode 1 consisting of the power supply roller 7, brake roller 8, capstan 9, pinch roller 1O and electrode guide 4 to a predetermined value, the rotation axis 16 is set as the center. If you rotate it as
A smooth conical or cylindrical surface is formed on the workpiece.

〔Effect of the invention〕

Since the present invention is configured as described above, when the present invention is used, it is possible to perform electric discharge machining that creates a three-dimensional free curved surface, and in particular, it is possible to perform electric discharge machining that creates a three-dimensional free curved surface. By moving and rotating the machining radius, it is possible to control the machining radius. This allows for highly accurate machining of corners of mold cavities, etc. to provide a smooth finished surface, and greatly increases machining efficiency. Therefore, it is possible to provide a wire electrode guide device that can be improved in the following manner.

Note that the configuration of the present invention is not limited to the above-mentioned embodiments. For example, the electrode guide body 2 may be configured by providing an electrode guide plate 3 with an electrode guide element 4, and the wire electrode 1 may be stretched on this. However, the wire electrode may be directly guided along the edge of the electrode guide plate, and the configuration of each other element can be freely changed within the scope of the purpose of the present invention. The present invention encompasses all of them.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of a wire electrode guiding device according to the present invention.

Claims (1)

[Scope of Claims] An electrode guide that guides a wire electrode in a substantially U-shape, a device that rotatably supports the electrode guide, and a device that supplies and collects the wire electrode to the electrode guide. A wire electrode guide device comprising: a device that supports the electrode guide movably in a direction perpendicular to the central axis of rotation of the electrode guide; and a machining radius control device for moving the electrode guide body.