Device and method of shim adjusting of die-cushion device
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United States of America Patent
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Jun 9, 2020
Grant Date -
Oct 26, 2017
app pub date -
Apr 20, 2017
filing date -
Apr 22, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A plurality of hydraulic cylinders capable of adjusting height direction positions of a plurality of die-cushion pins that are inserted into a plurality of die-cushion pin holes formed in a bolster, respectively, are arranged in a lattice state on a cushion pad, and the hydraulic cylinder faced with a die-cushion pin located below a projection surface of a blank holder in the plurality of hydraulic cylinders is selected. Then, by independently adjusting a height direction position of a piston rod of each of the selected hydraulic cylinders, respectively, the shim adjustment of substantially each of the die-cushion pins is realized.
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