Press machine and press method
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United States of America Patent
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May 7, 2019
Grant Date -
Aug 25, 2016
app pub date -
Aug 20, 2014
filing date -
Oct 2, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A press machine includes a drive mechanism that moves at least one of an upper tool and a lower tool and machines a workpiece placed between the upper and lower tools. The drive mechanism includes a first drive source that rotates a screw shaft serving as an advance-retract component and a second drive source that rotates a nut connected to the screw shaft. A structure including the upper tool and lower tools includes a casing supporting the screw shaft such that the screw shaft is rotatable, a movable member that is movably formed in the casing and can contact an end of the screw shaft or retract therefrom, and a drive unit that moves the movable member.
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