Nozzle and power-feed element for wire-cut electrical discharge machine

• US 4,539,459 A
• Filed: 05/18/1983
• Issued: 09/03/1985
• Est. Priority Date: 05/19/1982
• Status: Expired due to Fees

• Current Assignee: Amada Company Limited 200 Ishida Isehara-Shi Kanagawa-Ken Japan
• Original Assignee: Amada Company Limited
• Inventors: Yamagata, Toshitaka
• Primary Examiner(s): Paschall, M. H.
• Application Number:
  US06/495,616
• Time in Patent Office: 839 Days
• Field of Search: 219/69 W, 219/69 M, 219/69 E, 219/69 R, 219/69 D
• US Class Current: 219/69.12
• CPC Class Codes: B23H 7/10 Supporting, winding or electrical connection of wire-electrode
• CPC Class Codes: B23H 7/101 Supply of working media

Abstract

A wire-cut electrical discharge machine which effects an electrical discharges between a wire electrode and the workpiece. The wire-cut machine has a supply nozzle for supplying a machining fluid to an electrical discharge machining zone and a power-feed element for supplying pulse power to the wire electrode. The power-feed element contacting the wire electrode is provided inside the supply nozzle.

Claims

1. A wire-cut electrical discharge machine which effects an electrical discharge machining of a workpiece by generating electrical discharges between a wire electrode continuously supplied from a wire supply unit and said workpiece, comprising:

a nozzle means for supplying a machining fluid to an electrical discharge machining zone, said nozzle means being provided on the upper and/or lower sides of said workpiece;

a power-feed element contacting said wire electrode in order to feed a current thereto, said power-feed element being provided inside said nozzle means; and

a nozzle having a nozzle port for jetting out said machining fluid toward the electrical discharge machining zone, said nozzle being adapted to be vertically movable with respect to the power-feed element by means of the pressure of said machining fluid.

2. A wire-cut electrical discharge machine defined in claim 1, wherein said power-feed element provided inside said nozzle means is adapted to be detachable from said nozzle means and the power-feed element has obverse and reverse sides that are symmetrical with each other.

3. A wire-cut electrical discharge machine defined in claim 1, wherein said power-feed element has a disc shape.

4. A wire-cut electrical discharge machine defined in claim 1, wherein said power-feed element and said wire electrode contact each other at a plurality of portions.

5. A wire-cut electrical discharge machine defined in claim 4, wherein contact surface of said power-feed element with said wire electrode are divided in plural portions by a convex formed on said contact surface.

6. A wire-cut electrical discharge machine which effects an electrical discharge machining of a workpiece by generating electrical discharges between a wire electrode continuously supplied from a wire supply unit and said workpiece, comprising:

a nozzle means for supplying a machining fluid to an electrical discharge machining zone, said nozzle means being provided on the upper and/or lower sides of said workpiece;

a power feed element holder mounted within said nozzle means;

a power-feed element adjustably mounted in said holder, said element contacting said wire electrode in order to feed a current thereto, said power-feed element being provided inside said nozzle means;

an annular groove in said nozzle means;

a nozzle port for jetting out machining fluid toward the electrical discharge machining zone, said nozzle port having a flange that fits within said annular groove; and

a locking means for fixing the relative position of said nozzle port with respect to the nozzle means and the power-feed element, whereby when said locking means is unlocked, the nozzle port can be vertically moved with respect to the power-feed element by the pressure of said machining fluid.