Feed apparatus for screw machine

Turning – Process of turning

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Details

82 25, 214 12, B23B 1302

Patent

active

040685462

ABSTRACT:
A screw machine has a displaceable headstock and is provided with a pusher rod having at its front end a chuck that engages the rear end of a bar that passes axially through the headstock. This pusher rod is connected to a chain drive at least one of whose sprockets is connectable through a clutch to a gear meshing with a rack carried on the headstock. When this clutch is closed the headstock and pusher rod are positively locked together for joint displacement. During feed operations the two are disconnected so that the pusher rod can displace a new length of bar through the headstock, and the pusher rod may be arrested during backward displacement of the headstock in order to allow the chuck thereof to get new purchase on the bar.

REFERENCES:
patent: 3612298 (1971-11-01), Azuma
patent: 3875830 (1975-04-01), Lechot

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