发明名称 |
IMPROVED ELECTRODE FOR HIGH CURRENT DENSITY PLASMA ARC TORCH |
摘要 |
The diameter of a hafnium insert (44) press fit into the bottom end of a copper electrode (42) varies as a function of the level of a current carried by the electrode. The diameter is the minimum necessary to support emission at that currentlevel while also protecting the copper body against attack by the arc. The insert (44) is generally circular and preferably extends completely through the bottom wall (42g) to a circulating flow of cooling water at a hollow interior (48) of the electrode. The bottom wall includes an annular recess (42d) in a portion of the copper wallsurrounding the insert. A coolant tube (56) extends into the recess in a spaced relationship to provide a high flow velocity of the coolant over the interior rear surface of the electrode.
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申请公布号 |
CA2136203(C) |
申请公布日期 |
1997.05.20 |
申请号 |
CA19932136203 |
申请日期 |
1993.04.30 |
申请人 |
HYPERTHERM, INC. |
发明人 |
COUCH, RICHARD W., JR.;SANDERS, NICHOLAS A.;LUO, LIFENG;LU, ZHIPENG;BACKANDER, PATRIK;SOBR, JOHN |
分类号 |
B23K10/00;H05H1/34;(IPC1-7):B23K35/22 |
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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