| 摘要 |
PCT No. PCT/GB83/00073 Sec. 371 Date Nov. 9, 1983 Sec. 102(e) Date Nov. 9, 1983 PCT Filed Mar. 10, 1983 PCT Pub. No. WO83/03070 PCT Pub. Date Sep. 15, 1983.A numerically controlled machine tool capable of milling and turning operations has a continuously rotatable first spindle (10) to which is releasably secured a work holder (50). A rotationally positionable second spindle (20) has releasably secured thereto a tool holder (60). For turning operations, the second spindle (20) is locked against rotation and has secured thereto a tool holder having a turning tool (61), the workpiece (51) being held by the work holder on the first spindle (10). For milling operations, the second spindle (20) is unlocked, the work holder (50) is secured to the second spindle (20), and a tool holder (60) with a milling tool therein is secured to the first spindle (10). The changeover of work and tool holders is done by a transfer mechanism which takes appropriate holders (60), as well as work blanks, from a magazine system. In a modification the second spindle (20) is also adapted for continuous rotation, and the first spindle (10) is lockable against rotation so that the workpiece is always held on the second spindle for machining by milling or turning tools on the first spindle.
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