Two pressure counterbalance system for machine tool headstocks

Details Two pressure counterbalance system for machine tool headstocks Two pressure counterbalance system for machine tool headstocks

1971-12-16

1976-11-02

Weidenfeld, Gil

Cutting by use of rotating axially moving tool

Tool or tool with support

Having inversely angled cutting edge

408239R, B23C 102

Patent

active

039889653

ABSTRACT:
A counterbalance mechanism for a vertically movable machine tool headstock in which the net counterbalance force applied to the headstock is the same for both upward and downward movement of the headstock so that the accuracy of the spindle alignment is not disturbed by such movement. The counterbalance mechanism includes a hydraulic control system which automatically provides a greater pressure to a hydraulic counterbalance cylinder during raising movement of the headstock than during lowering movement so that difference in forces exerted by the counterbalance cylinder as a result of said pressure differential compensates for frictional resistive forces in the counterbalance mechanism and thereby enables the same net counterbalance force to be applied to the headstock.

REFERENCES:
patent: 3181424 (1965-05-01), Miller et al.

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