WIRE ELECTRICAL DISCHARGE MACHINING APPARATUS, WIRE ELECTRICAL DISCHARGE MACHINING METHOD, AND WORK

• US 20130341305A1
• Filed: 06/19/2013
• Published: 12/26/2013
• Est. Priority Date: 06/20/2012
• Status: Active Grant

• Current Assignee: Canon Marketing Japan Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Marketing Japan Kabushiki Kaisha (Canon Inc.)
• Inventors: Tsukamoto, Suguru, Okazaki, Hisao
• Granted Patent: US 9,636,764 B2
• Time in Patent Office: Days
• US Class Current: 219/69.12
• CPC Class Codes: B23H 1/028 for multiple gap machining
• CPC Class Codes: B23H 7/08 Wire electrodes
• CPC Class Codes: B23H 7/101 Supply of working media
• CPC Class Codes: B23H 7/36 Supply or regeneration of working media

Abstract

A mechanism in a wire electrical discharge machining apparatus for machining a workpiece by electrical discharge between a wire and the workpiece is disclosed. The mechanism includes a processing fluid bath configured to store processing fluid used for electrical discharge machining between the workpiece and the wire, a processing fluid supply port to communicate with the processing fluid bath and supply the processing fluid into the processing fluid bath from a processing fluid supply apparatus supplying the processing fluid, and a stream control mechanism to suppress a stream of the processing fluid supplied from the processing fluid supply port into the processing fluid bath in the direction of the water surface of the processing fluid in the processing fluid bath.

Claims

1. A wire electrical discharge machining apparatus for machining a workpiece by electrical discharge between a wire and the workpiece, the apparatus comprising:

a processing fluid bath configured to store processing fluid used for electrical discharge machining between the workpiece and the wire;

a processing fluid supply port configured to communicate with the processing fluid bath and to supply the processing fluid into the processing fluid bath from a processing fluid supply apparatus supplying the processing fluid; and

a stream control mechanism configured to suppress a stream of the processing fluid supplied from the processing fluid supply port into the processing fluid bath in a direction of a water surface of the processing fluid in the processing fluid bath,

wherein the stream control mechanism is provided at an upper portion in a vertical direction of the processing fluid supply port between the wire and the processing fluid supply port.

2. The wire electrical discharge machining apparatus according to claim 1, wherein the stream control mechanism is provided in a position where the processing fluid supplied from the processing fluid supply port to the processing fluid bath detours the stream control mechanism in the processing fluid bath and flows in the direction of the water surface of the processing fluid in the processing fluid bath.

3. The wire electrical discharge machining apparatus according to claim 1, wherein the processing fluid supply port is provided communicating with the processing fluid bath, at a lower portion in the vertical direction of the wire traveling in a vicinity of the water surface of the processing fluid in the processing fluid bath, and

wherein the stream control mechanism is a board provided between the wire and the processing fluid supply port.

4. The wire electrical discharge machining apparatus according to claim 1, wherein the stream control mechanism is a board having a length equal to or longer than a width of a plurality of the wires.

5. The wire electrical discharge machining apparatus according to claim 1, wherein the stream control mechanism further includes an adjustment unit configured to adjust the length of the board according to the number of the wires.

6. The wire electrical discharge machining apparatus according to claim 1, wherein the stream control mechanism further includes a dispersion mechanism provided in the processing fluid supply port and configured to disperse the stream of the processing fluid supplied from the processing fluid supply port into the processing fluid bath.

7. The wire electrical discharge machining apparatus according to claim 6, wherein the dispersion mechanism is made of a porous material.

8. The wire electrical discharge machining apparatus according to claim 6, wherein the dispersion mechanism is made of a sponge.

9. A method of wire electrical discharge machining using a wire electrical discharge machining apparatus for machining a workpiece by electrical discharge between a wire and the workpiece, the method comprising:

storing a processing fluid used for electrical discharge machining between the workpiece and the wire in a processing fluid bath;

supplying the processing fluid into the processing fluid bath from a processing fluid supply apparatus supplying the processing fluid by a processing fluid supply port communicating with the processing fluid bath; and

suppressing a stream of the processing fluid supplied from the processing fluid supply port into the processing fluid bath in a direction of a water surface of the processing fluid in the processing fluid bath by a stream control mechanism provided at an upper portion in a vertical direction of the processing fluid supply port between the wire and the processing fluid supply port.

10. A work in which a workpiece is machined by the wire electrical discharge machining method according to claim 9.