Method and apparatus for the wire cut electric discharge machine

• US 6,403,911 B1
• Filed: 09/22/2000
• Issued: 06/11/2002
• Est. Priority Date: 09/22/2000
• Status: Expired due to Fees

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Chien, Chih-Hsien, Liang, Jui-Fang, Day, Yea-June, Shih, Huie-Jan, Hsu, Jih-Jong
• Primary Examiner(s): Evans, Geoffrey S.
• Application Number:
  US09/667,682
• Time in Patent Office: 627 Days
• Field of Search: 219/69.12
• US Class Current: 219/69.12
• CPC Class Codes: B23H 7/102 Automatic wire threading
• CPC Class Codes: B23H 7/105 Wire guides

Abstract

A wire cutting discharging machining device and the method thereof are disclosed. The method includes the steps of feeding a wire to be machined to a plurality of guide blocks; detecting one end of the wire and positioning the end; driving the plurality of guide blocks and a parallel device which is connected to the plurality of guide blocks and is operated synchronously so as to vertically guide the wire to an upper guide; and feeding the wire continuously to a workpiece, and a lower guide to a drawing roller. When in the process of machining, if a wire is broken abruptly or a machining path is to be updated, then a wire end detecting device, a wire cutting means, a wire end clamping device and a wire pressing device are used to achieve the object of wire modification.

Claims

1. A Wire Cutting Discharging Machining Method, comprising:

a. feeding a wire to be machined to a plurality of guide blocks;

b. detecting one end of the wire and positioning the end of the wire;

c. driving the plurality of guide blocks and a parallel means which is connected to the plurality of guide blocks and is operated synchronously so as to vertically guide the wire to an upper guide; and

d. feeding the wire continuously to a workpiece, and a lower guide to a drawing roller.

2. The wire cutting discharging machining method as claimed in claim 1, wherein the moving speed of the parallel means is slightly larger than the feeding speed of the wire.

3. The wire cutting discharging machining method, comprising:

a. feeding a wire to be machined to a plurality of guide blocks;

b. detecting one end of the wire and positioning the end of the wire;

c. feeding the wire continuously so that the end of the wire moves to an upper guide;

d. driving the plurality of guide blocks and a parallel means which is connected to the plurality of guide blocks and is operated synchronously so as to position the wire; and

e. feeding the wire continuously to a workpiece, and a lower guide to a drawing roller.

4. The wire cutting discharging machining method as claimed in claim 3, further comprising an automatic wire modifying method which includes the following steps:

f. winding a remained wire to a wire receiving barrel;

g. detecting one wire end after the wire is broken and positioned;

h. feeding the wire of a proper length;

i. positioning and clamping the wire;

j. cutting a deformed wire;

k. removing a cutting and deformed wire; and

l. performing a wire penetrating step again.

5. A wire cutting discharging machining device comprising:

a feeding device for feeding a wire to be machined;

a plurality of guide blocks for receiving the wire fed by the feeding device;

a parallel means connected to the plurality of guide blocks and operated synchronously therewith; and

a driving means for driving the parallel means and guide blocks to protrude out uniformly, guiding the wire to an upper guide so that after the wire passes through a workpiece to a drawing roller, thus, a wire travelling is complete.

6. The wire cutting discharging machining device as claimed in claim 5, further comprising a guide device for guiding each guide block to be moved linearly.

7. The wire cutting discharging machining device as claimed in claim 5, wherein each guide block has a concave chamber, a lower portion and a tapered surface matched with the concave chamber so that two adjacent guide blocks can be connected tightly.

8. The wire cutting discharging machining device as claimed in claim 5, wherein a wire clamping device is installed at a guide block at a distal end of the guide blocks, as a wire end of the wire is positioned, the wire clamping device clamps the wire, and a tension roller of the feeding device rotates idly;

and the parallel means moves downwards to pull the wire.

9. The wire cutting discharging machining device as claimed in claim 5, further comprising an automatic wire modifying device comprising:

a wire end detecting device for detecting one end of the wire and positioning the end;

a wire pressing device for positioning the wire;

a wire cutting device for cutting the wire and removing a deformed wire;

a wire clamping device for clamping a cutting wire; and

a quality adjusting device for straightening the wire.

10. The wire cutting discharging machining device as claimed in claim 9, wherein the annealing device cause heat gas to pass therethrough for heating the wire end to achieve the object of annealing and straightening the wire.

11. The wire cutting discharging machining device as claimed in claim 9, wherein in the annealing device, a current is conducted between at least two movable guide blocks for annealing.