| 摘要 |
An initial hole machining device (40) for a wire-cut electric discharge machine, which is disposed adjacent to a wire guide (28) to improve the efficiency of machining of the wire-cut electric discharge machine and is intended to prevent the interference relative to the peripheral mechanisms inclusive of the wire guide. The machining device is provided with a frame unit (42) which is movably mounted on a vertically moving unit (24) of vertically feeding mechanisms (12, 14, 16, 18, 20) of the electric discharge machine, an initial hole machining unit (50) which is slidably mounted on the frame unit so as to be movable between a position of machining an initial hole and a position of retreat, and springs (56a, 56b) that urge the machining unit toward the position of retreat. Movement of the initial hole machining unit is controlled by supplying or interrupting compressed air to an air cylinder (48) which drives the machining unit toward the position of machining an initial hole against the force of the springs. Therefore, the initial hole machining device is simple in construction and operation, exhibits excellent durability in an environment where a machining liquid is used, and contributes to energy saving. |
