Wire electric discharge machining apparatus

• US 5,086,203 A
• Filed: 06/01/1989
• Issued: 02/04/1992
• Est. Priority Date: 06/03/1988
• Status: Expired due to Fees

• Current Assignee: Hitachi Seiko Limited
• Original Assignee: Hitachi Seiko Limited
• Inventors: Kobayashi, Kazuo, Nishikizawa, Hidemaru, Miyahara, Hitoshi, Shimomoto, Hironori, Maruyama, Osamu
• Primary Examiner(s): Evans, Geaffrey S.
• Application Number:
  US07/360,131
• Time in Patent Office: 978 Days
• Field of Search: 219/69.12, 219/69.16, 219/68, 219/69.11
• US Class Current: 219/69.12
• CPC Class Codes: B23H 7/06 Control of the travel curve of the relative movement between electrode and workpiece

Abstract

A wire electric discharge machining apparatus wherein workpiece and a wire supported by a pair of guides are moved relative to each other in an X-axis direction and a Y-axis direction, one of the guides being moved relative to the other guide in two directions in a horizontal plane for performing a machining operation. The apparatus comprises the pair of guides, a frame, rails mounted on a column, a U-axis moving unit, and a V-axis moving unit. One of the guides is mounted on the frame. The V-axis moving unit on which the other guide is mounted is mounted movably on the U-axis moving unit in parallel with the Y-axis. The frame and the U-axis moving unit are arranged in alignment with the rails.

Claims

1. In a wire electric discharge machining apparatus in which a workpiece and a wire supported by a pair of guides are moved relative to each other in an X-axis direction and a Y-axis direction, one of said guides being moved relative to the other guide in two directions in a horizontal plane, the improvement comprising said pair of guides, a frame movable in the X-axis direction on a column, a table for mounting the workpiece and moving in the Y-axis direction on a base, rails mounted on the column, a U-axis moving means and a V-axis moving means in parallel with said Y-axis, and said frame and said U-axis moving means are arranged in alignment on the same rails.

3. The apparatus according to claim 1 or 2, wherein a drive means for said U-axis moving means is mounted on said frame so that said U-axis moving means is moved relative to said frame.

4. The apparatus according to claim 1 or 2, wherein a drive means for said U-axis moving means is mounted on said column so that said U-axis moving means is moved relative to said column.

2. In a wire electric discharge machining apparatus in which a workpiece and a wire supported by a pair of guides are moved relative to each other in an A-axis direction and a Y-axis direction, one of said guides being moved relative to the other guide in two directions in a horizontal plane, the improvement comprising said pair of guides, a frame moving in the X-axis direction on a column, a table for mounting the workpiece and moving in the Y-axis direction on a base, rails mounted on the column, a Z-axis quill, a U-axis moving means and a V-axis moving means, one of said guides being mounted on said frame, said V-axis moving means on which the other guide is mounted being mounted movably on said Z-axis quill in parallel with said Y-axis, said Z-axis quill being mounted movably on said U-axis moving means in the Z-direction, and said frame and said U-axis are arranged in alignment on the same rails.

5. A wire electric discharge machining apparatus comprising a frame means, a column means for supporting said frame means, a first guide means and a second guide means for supporting a wire, a V-axis moving means for moving in a V-axis direction in parallel to a Y-axis, a U-axis means for moving in a U-axis direction, a table means for supporting a work piece, rail means mounted on said column means, and wherein said frame means is movable in X-axis direction and said table means is movable in the Y-axis direction, said first guide means is mounted on said frame, said second guide means is mounted on said V-axis moving means, and said V-axis moving means is mounted on said U-axis moving means, and said frame means and said U-axis moving means are disposed in alignment with said rail means.

6. A wire electric discharge machining apparatus according to claim 5, further comprising a Z-axis quill means, said V-axis moving means being movably mounted on said Z-axis quill means in parallel with said Y-axis, and wherein said Z-axis quill means is movably mounted on said U-axis moving means for movement in a Z-direction.

7. A wire electric discharge machining apparatus according to one of claim 5 or 6, wherein said frame means includes a recess means for accommodating said U-axis moving means, and wherein a center of movement of said U-axis moving means is substantially coincidential with a center position of said recess means.

8. A wire electric discharge machining apparatus according to claim 7, wherein a drive means for said U-axis moving means is mounted on said frame means for enabling said U-axis moving means to be moved relative to said frame means.

9. A wire electric discharge machining apparatus according to claim 7, wherein a drive means for said U-axis moving means is mounted on said column means for enabling the U-axis moving means to be moved relative to said column means.