| 摘要 |
PROBLEM TO BE SOLVED: To enhance the cutting quality of a product, especially, the cutting quality of a hole in plasma arc cutting. SOLUTION: A plasma cutting device (1) is a device for cutting out a product from a plate (W) in the following manner. The plate (W) is cut by moving a plasma torch (6) at a cutting speed along a cutting route corresponding to the shape of the product while forming a plasma arc (A) from a nozzle of the plasma torch (6) to the plate (W) by supplying an arc current and a plasma gas to the plasma torch (6). A controller (36) for controlling the plasma cutting device is composed as follows. When the hole is cut, it controls the plasma cutting device so that the cutting speed is lower, the value of the arc current is smaller, and the plasma gas flow rate or the pressure is controlled smaller compared with the case when the outer shape is cut. COPYRIGHT: (C)2005,JPO&NCIPI
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