发明名称 |
PLASMA CUTTING METHOD AND NC PLASMA CUTTING APPARATUS |
摘要 |
<p>The present invention relates to a plasma cutting method and a NC plasma cutting apparatus in which an improvement can be made in the quality of a bore-cut product obtained by using a transferred plasma arc, and the productive efficiency can also be enhanced. In order to achieve the above-described advantages, the transferred plasma arc is switched to a non-transferred plasma arc in a position immediately before a cutting finishing point and in the vicinity of a position in which cutting lines cross each other. Simultaneously with this switching operation, the moving speed of a plasma torch is varied in accordance with a change in the plasma arc current. Additionally, the transferred plasma arc current is reduced in a position immediately before the cutting finishing point and in the vicinity of a position in which cutting lines cross each other. The moving speed of the plasma torch may be varied in accordance with the reduction in the arc current. Further, the above-described voltage detecting function is kept in the off state during a cutting operation, and it is actuated in a position immediately before the cutting finishing point and in the vicinity of a position in which cutting lines cross each other. <IMAGE></p> |
申请公布号 |
EP0719613(A1) |
申请公布日期 |
1996.07.03 |
申请号 |
EP19940907659 |
申请日期 |
1994.02.23 |
申请人 |
KABUSHIKI KAISHA KOMATSU SEISAKUSHO |
发明人 |
SHINTANI, TOSHIYA;NAKAU, YUTAKA;HASHIZUME, YOSHIHIKO |
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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