Method for machining the screw of a compression or expansion machine and a device for the application of said method
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United States of America Patent
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-
Sep 16, 1980
Grant Date -
N/A
app pub date -
Apr 18, 1978
filing date -
Jun 2, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tool having only an end cutting-edge carries out a first movement of penetration into a screw blank so as to produce a groove having flanks substantially parallel to the pinion axis. The tool-holder is angularly displaced with respect to the spindle which carries the screw blank. A second movement of tool penetration takes place while the relative displacement is progressively reduced in order to obtain an inclined flank which produces a V-shaped profile. The screw is intended to form part of a compression and expansion machine and to cooperate with at least one pinion having V-form teeth.
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