Wire cutting electric discharge machine

• US 5,142,116 A
• Filed: 06/20/1990
• Issued: 08/25/1992
• Est. Priority Date: 06/24/1989
• Status: Expired due to Fees

• Current Assignee: Amada Wasino Co. Ltd. (Amada Company Limited)
• Original Assignee: Amada Wasino Co. Ltd. (Amada Company Limited)
• Inventors: Ono, Yasunori, Yokomichi, Shigeharu
• Primary Examiner(s): Evans, Geoffrey S.
• Application Number:
  US07/540,754
• Time in Patent Office: 797 Days
• Field of Search: 219/69.12, 226/172, 226/170, 226/171, 226/183, 226/190
• US Class Current: 219/69.12
• CPC Class Codes: B23H 7/10 Supporting, winding or electrical connection of wire-electrode

Abstract

A wire cutting electric discharge machine with a wire guide roller having a V-shaped groove beneath the workpiece, and a wire guide between the guide roller and a conveyor belt.

Claims

1. A wire cutting electric discharge machine comprising:

a guide roller which guides a wire electrode laterally away from an area of process of the discharge machine, the guide roller being provided below a workpiece which is being processed in said discharge machine;

a transport mechanism which transports laterally the wire electrode from said guide roller further away from said area of process of said discharge machine; and

a withdrawal mechanism positioned at a portion following said transport mechanism, and which engages and withdraws the wire electrode transported by said transport mechanism;

wherein a wire guide is provided between said guide roller and said transport mechanism which guides the electrode toward said transport mechanism.

2. A wire cutting electric discharge machine which processes a metal workpiece with a wire electrode having a diameter, said wire cutting electric discharge machine having an automatic wire electrode threading mechanism, comprising:

a transport mechanism for laterally transporting the wire electrode fed from an area for processing the workpiece, said transport mechanism including upper and lower transport belts which are pressed together to interposedly secure the wire electrode therebetween;

a withdrawal mechanism disposed adjacent to a portion following said transport mechanism for pinching and then withdrawing the wire electrode transported by said transport mechanism;

a guide roller for guiding the wire electrode fed from said processing area to said transport mechanism, said guide roller being disposed below said processing area such said guide roller partially contacts with said lower belt of said transport mechanism, said guide roller having a circumferential groove of a size through which the electrode fed from said processing area is guided, and the size of said groove in the radial direction of said guide roller being larger than the diameter of the wire electrode; and

a wire guide for guiding the wire electrode from said processing area by said guide roller between said transport belts of said transport mechanism.

3. A wire cutting electric discharge machine as claimed in claim 2, wherein said wire guide is disposed between said guide roller and said upper belt of said transport mechanism.