| 摘要 |
PURPOSE:To limit the machining time to the minimum required to save time in the electric discharge machining of a roll for cold rolling to satin-finish a steel band by automatically setting the feed speed of a head column to the value which is the mast suitable to the roll diameter. CONSTITUTION:An electrode feed mechanism is provided with a counter (absolute value reader) 16 which reads the positions where electrodes 11, 11' contact a roll 3. From this read value by the counter 16, the roll diameter is calculated, and further, based on this roll diameter and the surface roughness, the feed speed of the head columns 9, 9' is calculated by an arithmetic circuit 17. The feed speed of the head columns 9, 9' calculated here is set in a drive unit 7. When the roll diameter is automatically detected and the surface roughness is determined, the feed speed of the head columns 9, 9' which is the most suitable to the roll diameter is obtained by the arithmetic unit 17 and is automatically set in the drive unit 7. Based on this set speed, the drive unit 7 controls the head columns 9, 9' at a constant feed speed. |
