发明名称 |
IMPROVED WELDING APPARATUS AND METHOD |
摘要 |
The invention provides a plasma welding or brazing process in which a direct current pilot arc is maintained throughout the process. The process comprises the steps of setting a pilot arc power supply (6) to a relatively high level, generating a high voltage spark discharge between a non-consumable electrode (14) of a plasma welding or brazing torch (2) and a nozzle (18) of said torch in order to start the flow of a pilot arc current, detecting the pilot arc current and reducing the pilot arc current to a relatively low level. The invention further provides apparatus for carrying out plasma arc welding, comprising a plasma welding torch, a controller and a power supply. The controller further comprises means for detecting the flow of a pilot arc current and or a main arc current and means for reducing this current on detection. |
申请公布号 |
WO0030797(A1) |
申请公布日期 |
2000.06.02 |
申请号 |
WO1999GB03874 |
申请日期 |
1999.11.22 |
申请人 |
ARC KINETICS LIMITED;HUGHES, RUSSELL, VERNON |
发明人 |
HUGHES, RUSSELL, VERNON |
分类号 |
B23K10/00;(IPC1-7):B23K10/00 |
主分类号 |
B23K10/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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