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United States of America Patent
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Aug 18, 2009
Grant Date -
Dec 21, 2006
app pub date -
Aug 30, 2004
filing date -
Dec 3, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A pressing apparatus using a motor, in which a driving device for fast feed, which lowers a upper die to a position immediately before pressing, and a motor for pressing, which performs a pressing operation, are used to cause the driving device for fast feed and the motor for pressing to operate cooperatively, and only one position detector, which detects a present position of a slider, is provided for a set of the driving device for fast feed and the motor for pressing. A lock device is provided so as to lock the slider and the screw shaft while the motor for pressing is operating for pressing a work piece.
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