| 摘要 |
PURPOSE:To make an unsymmetrically worn electrode quickly fit the shape of a roll in the electric discharge machining of a roll for pressure-rolling a steel band by machining in a low consumption mode when the electrode moves off the end of the roll and in a usual consumption mode when it moves backward. CONSTITUTION:The power supply to electrodes 11, 11' from pulse power sources 15, 15' is controlled by a control device 16. When the machining is performed with either one of the electrodes 11, 11' off the surface of a roll 3 to be machined, the control device 16 operates to function as follows: if it is done in such a direction as to make it get off more, it is controlled to do in a low consumption mode, and if it is done in the reverse direction, or in the backward direction, it is controlled to do in a usual consumption mode. In the above-mentioned machining method, a partial machining method is used, and one electrode which gets off employs the head in common with the other electrode. However, if the exclusive head is used for each of them, it will be done much more effectively. |
