Bending angle correction method and press brake
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United States of America Patent
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-
Feb 20, 2001
Grant Date -
N/A
app pub date -
Apr 20, 1999
filing date -
Oct 29, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bend angle correction method directed to carrying out simple and accurate penetration of a movable die into a fixed die to produce a uniform angle throughout the length of a workpiece, being unaffected by material variations. When bending a sheet-like workpiece to a desired angle by the cooperative movement of a movable punch driven by three or more drive shafts and a fixed die disposed in an opposing relationship with the movable die, the bend angle of the workpiece is measured during bending operation and the difference between the measured bend angle and a target angle is obtained, at at least three points which are the ends and center of the workpiece. Based on the differences, correction amounts for the penetration of the movable die are obtained on a shaft-load imposed point basis.
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