Press with independent controls for reciprocation of and pressure application by RAM
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United States of America Patent
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Oct 19, 1993
Grant Date -
N/A
app pub date -
Sep 11, 1992
filing date -
Sep 24, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A press includes a reciprocation unit having a crank structure which is driven in horizontal reciprocation by an associated press drive. A motion direction shifting unit having a link structure is coupled to the reciprocation unit a ram so as to reciprocate the ram vertically between an upper position and a lower rest position in response to the horizontal reciprocation of the reciprocation unit, such that the ram remains in a state of substantial rest with respect to the shifting unit for a predetermined period of time upon reaching the lower position. A control unit controls a hydraulic fluid supply system to cause a pressure applying device to apply a controlled press forming force to the ram when a sensor detects that the ram is in the rest state.
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