| 摘要 |
In a thermal cutting machine such as plasma cutting machine or a laser cutting machine, control of the moving speed of a cutting head ( 24 ) is improved so as to increase throughput of the cutting machine with increase in cost restricted. Products are cut out one by one from a plate member ( 14 ) while a cutting head ( 24 ) is moved relative to the plate member ( 14 ) on a table ( 12 ). In this process, when the cutting head ( 24 ) is fast-forwarded without performing cutting to a position at which cutting of each product starts, the speed of movement in the direction (Y-axis direction) along a short side of the table ( 12 ) is controlled at a speed higher than that of the movement in the direction (X-axis direction) along a long side of the table. The pattern of a sequence of cutting out the products from the plate member ( 14 ) is a meandering pattern in which reciprocation in the Y-axis direction dominates and the movement in the X-direction is one time one way. Exhaust chambers are arranged in the X-axis direction in the table ( 12 ), and the exhaust chambers are driven as the cutting head ( 24 ) moves in the X-axis direction. |
