WIRE-CUT ELECTRIC DISCHARGE MACHINE WITH WIRE ELECTRODE CUTTING FUNCTION

• US 20120305530A1
• Filed: 04/18/2012
• Published: 12/06/2012
• Est. Priority Date: 05/30/2011
• Status: Active Grant

• Current Assignee: Fanuc Corporation
• Original Assignee: Fanuc Corporation
• Inventors: NISHIKAWA, Ryou, INABA, Harutora
• Granted Patent: US 8,759,708 B2
• Time in Patent Office: Days
• US Class Current: 219/69.12
• CPC Class Codes: B23H 7/102 Automatic wire threading

Abstract

In a wire electric discharge machine in which chuck part electrodes that hold a wire electrode are provided on the upper side of an upper wire guide and electrodes of a detecting part are provided on a lower stream side of the chuck part electrodes, a part, which contacts with the chuck part electrodes, of a surface of the wire electrode is hardened by locally cooling down the part by air blowing during energization to the wire electrode. Accordingly, wire metal powder is hardly generated from the wire electrode even though the wire electrode rubs against the chuck part electrodes.

Claims

1. A wire-cut electric discharge machine having a function of cutting a wire electrode, comprising:

an upper wire guide and a lower wire guide that respectively guide the wire electrode on upper and lower sides of a workpiece;

first wire electrode cutting energizing electrodes that are provided on the upper side of the upper wire guide on a traveling path of the wire electrode, and hold the wire electrode;

second wire electrode cutting energizing electrodes that are provided on a lower stream side compared to the first wire electrode cutting energizing electrodes;

a tensile force imparting part configured to impart predetermined tensile force to the wire electrode; and

a cooling part configured to cool down a part on which the first wire electrode cutting energizing electrodes and the wire electrode contact with each other;

wherein

the wire electrode is energized for heating of the wire electrode via the first wire electrode cutting energizing electrodes and the second wire electrode cutting energizing electrodes and, at the same time, the wire electrode is imparted with the tensile force by the tensile force imparting part so that the wire electrode is cut.

2. The wire-cut electric discharge machine having the function of cutting a wire electrode according to claim 1, wherein the cooling part supplies compressed air.

3. The wire-cut electric discharge machine having the function of cutting a wire electrode according to claim 1, wherein the cooling part supplies cooling water.

4. The wire-cut electric discharge machine having the function of cutting a wire electrode according to claim 1, wherein the cooling part is a heat pump exchanger.