| 摘要 |
PURPOSE:To make a tool for the following process stand by near a workpiece while machining or to carry out simultaneous machining by providing headstocks and a guide bush, a first tool rest which slides perpendicularly to them, a second tool rest which slides both in parallel and perpendicularly to them, and an operation correcting means. CONSTITUTION:A workpiece is mounted on the main spindle of a headstock 22, and machined with a tool 33 installed on a turret 34 of a first tool rest 32 through a guide bush 11. Also, during this machining, the tool 45 of the turret 46 of a second tool rest 44 can be moved in the direction of Z2, or X2, so as to be kept standing by near the workpiece, or to carry out simultaneous machining. The simultaneous machining is carried out which a corrected moving quantity, by adding the feeding quantity and speed of a Z1 axis to those of a single Z2 axis. It is also possible to carry out simultaneous machining by making an opposite main spindle 52 hold a separate workpiece and using a tool 45. Thus, by controlling headstocks which are opposite to each other with a guide bush interposed in between, and first and second tool rests, by means of an NC device, it is possible to make a tool for the following process wait near a workpiece while being machined by another tool, or to carry out simultaneous machining.
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