Invention Application
- Patent Title: Composite electrode for a plasma arc torch
- Patent Title (中): 等离子弧焊炬复合电极
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Application No.: US10957478Application Date: 2004-09-30
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Publication No.: US20050067387A1Publication Date: 2005-03-31
- Inventor: David Cook , Kirk Ferland , Charles Hackett , Yong Yang , Richard Couch , Zhipeng Lu
- Applicant: David Cook , Kirk Ferland , Charles Hackett , Yong Yang , Richard Couch , Zhipeng Lu
- Applicant Address: US NH Hanover
- Assignee: Hypertherm, Inc.
- Current Assignee: Hypertherm, Inc.
- Current Assignee Address: US NH Hanover
- Main IPC: B23K10/02
- IPC: B23K10/02 ; H05B7/07 ; H05B7/18 ; H05H1/34 ; B23K10/00

Abstract:
A plasma arc torch that includes a torch body having a nozzle mounted relative to a composite electrode in the body to define a plasma chamber. The torch body includes a plasma flow path for directing a plasma gas to the plasma chamber in which a plasma arc is formed. The nozzle includes a hollow, body portion and a substantially solid, head portion defining an exit orifice. The composite electrode can be made of a metallic material (e.g., silver) with high thermal conductivity in the forward portion electrode body adjacent the emitting surface, and the aft portion of the electrode body is made of a second low cost, metallic material with good thermal and electrical conductivity. This composite electrode configuration produces an electrode with reduced electrode wear or pitting comparable to a silver electrode, for a price comparable to that of a copper electrode.
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