Hollow-spindle method of machining a short-length workpiece

Details Hollow-spindle method of machining a short-length workpiece Hollow-spindle method of machining a short-length workpiece

1988-03-29

1989-05-09

Schmidt, Frederick R.

Turning

Process of turning

82124, 82147, B23B 100, B23B 306, B23B 1500

Patent

active

048278157

ABSTRACT:
A method of machining short-length workpieces provides a hollow spindle adapted to be driven in rotation around a longitudinal axis thereof, the spindle having first and second chucks at one and the other longitudinal ends thereof, respectively. A short-length workpiece is gripped by the first chuck and the spindle and workpiece gripped by the first chuck are rotated for performing a primary operation of machining on one end of the workpiece. The first chuck is then loosened to release the workpiece and the workpiece conveyed within the first chuck through the hollow interior of the spindle into the second chuck, which is in a loosened state, by pushing the workpiece from one longitudinal end of the spindle to other. The second chuck is then tightened to grip the workpiece so as to rotate the workpiece together with the spindle for performing a secondary operation of machining on the opposite end of the workpiece. Finally, the second chuck is loosened to release the workpiece. An alternative embodiment provides for machining on a pair of parallel spindles having oppositely facing chucks.

REFERENCES:
patent: 4064774 (1977-12-01), Maddock
patent: 4090423 (1978-05-01), Waage
patent: 4402120 (1983-09-01), Haygood
patent: 4445405 (1984-05-01), Champeau et al.
patent: 4457193 (1984-07-01), Matthey

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