초록 ▼

An electronic adaptive control system for use with hydraulic press brakes to provide compensation for material spring back to accurately produce a desired bend angle in the work piece with a single ram stroke. Fixed input parameters associated with the press brake and material properties, together w

An electronic adaptive control system for use with hydraulic press brakes to provide compensation for material spring back to accurately produce a desired bend angle in the work piece with a single ram stroke. Fixed input parameters associated with the press brake and material properties, together with ram position and force data are continuously input to a digital computer which calculates the precise point of punch penetration necessary to reverse ram movement in order to produce the desired bend angle in the work piece. By using in-process measurements, a significant savings in machine set-up-time can be achieved in order to produce an accurate bend angle in the work piece the first time and every time.

대표청구항 ▼

In a press brake for bending metal sheet and the like of the type having a frame supporting a bed, a die member mounted on the bed, a ram displaceable with respect to said bed, a punch member mounted on the ram and configured to engage the die member, means for moving said ram toward said bed and re

In a press brake for bending metal sheet and the like of the type having a frame supporting a bed, a die member mounted on the bed, a ram displaceable with respect to said bed, a punch member mounted on the ram and configured to engage the die member, means for moving said ram toward said bed and reversing means for moving said ram away from said bed, the improvement in combination therewith comprising adaptive control means for compensating for material springback to accurately produce a desired bend angle in the sheet with a single ram stroke, said control means comprising means for sensing the position of the ram to produce a ram position signal, means for sensing the force supplied to the ram to produce a load signal, and digital data processing means responsive to said position and load signals for determining the precise point of punch penetration at which to activate said reversing means to cause ram reversal to produce the desired bend angle.