Lathes

Details Lathes Lathes

1987-12-09

1989-05-09

Schmidt, Frederick R.

Turning

Process of turning

82159, B23B 300

Patent

active

048278149

ABSTRACT:
A lathe comprising first and second headstocks having respective rotatable spindles carrying a respective workpiece gripping devices, the second headstock being presented towards the first headstock, and being relatively movable towards and away therefrom so that a workpiece gripped by the gripping device of the first headstock can be transferred to the gripping device of the second headstock. Movable tool carrier means associated with the first and second headstocks, whereby machining operations can be performed on workpieces held in the gripping devices of the first and second headstocks, and there is means for monitoring the angular positions of the spindles whereby rotational datum positions of the spindles can be established. A first drive and positioning means is provided for rotating the first spindle, and for positioning said first spindle angularly in predetermined relation to its rotational datum position, and, second drive and positioning means is provided for rotating said second spindle and for positioning said second spindle angularly in predetermined relation to its rotational datum position. The invention further resides in methods of transferring a workpiece between spindles in such a lathe.

REFERENCES:
patent: 3750244 (1973-08-01), Smith
patent: 4327614 (1982-05-01), Klancnik et al.
patent: 4457193 (1984-07-01), Matthey
patent: 4683787 (1987-08-01), Link
patent: 4719676 (1988-01-01), Sansone

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