The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 2004
Filed:
Apr. 19, 2002
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An automatic wire feeder of a wire electric discharge machine in which electric discharge is generated between a traveling wire electrode ( ) and a workpiece so as to machine the workpiece by the electric discharge energy, comprises: a feed roller ( ) for feeding the wire electrode ( ); a slider block ( ) supported being capable of going up and down; a guide pipe ( ), fixed to the slider block ( ), for guiding the wire electrode ( ); a hollow member ( ), fixed to the slider block ( ), the outer diameter of which is reduced in a wire feed direction; and a pressurized gas supply for supplying pressurized gas toward the outer diameter of the hollow member ( ), wherein a forward end section of the hollow member ( ) is inserted into an inner diameter section of an upper section of the guide pipe ( ) while a predetermined overlapping length L is kept, a predetermined clearance D is formed between the inner diameter of the guide pipe ( ) and the outer diameter of the forward end section of the hollow member ( ), and a thrust is given to the wire electrode ( ) by pressurized gas, which is supplied by the pressurized gas supply. By the conveyance force of pressurized gas flowing in the guide pipe ( ), the wire electrode ( ) can be automatically fed with high reliability.