Electric heating – Metal heating – By arc
Reexamination Certificate
2006-08-08
2006-08-08
Paschall, Mark (Department: 3742)
Electric heating
Metal heating
By arc
C219S121440, C219S121540
Reexamination Certificate
active
07087855
ABSTRACT:
Cutting quality of the product, in particular, hole cutting quality, in plasma arc cutting is improved. A control unit, which controls a plasma cutting apparatus for cutting a product from a plate material by moving a plasma torch at a cutting speed along a cutting path corresponding to the product shape to cut the plate material, while supplying an arc current and a plasma gas to the plasma torch and forming a plasma arc from a nozzle of the plasma torch to the plate material, conducts control so that, when a hole is cut, a cutting speed is lower, a value of the arc current value is smaller, and a plasma gas flow rate or pressure is less than those when a contour is cut.
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Kabata Tetsuya
Yamaguchi Yoshihiro
Armstrong Kratz Quintos Hanson & Brooks, LLP
Komatsu Industries Corporation
Paschall Mark
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