Springback compensated continuous roll forming machines

Details Springback compensated continuous roll forming machines Springback compensated continuous roll forming machines

1975-04-21

1976-05-11

Mehr, Milton S.

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

72 17, 72702, 72 31, B21D 514, G01B 520

Patent

active

039553892

ABSTRACT:
A sensing structure and control system therefor suitable for use in a numerically controlled roll forming machine are disclosed. The sensing structure includes a support arrangement for mounting a sensor in a position such that a work part exiting from contour forming rollers passes through the structure. The support arrangement is formed such that the sensor is free to move as exiting part contours change. As exiting part contours change, the change in position of the sensor varies the position of a rotary variable-differential transformer (RVDTs). The output from the RVDT is compared with signals related to the desired curvature of the part and the result of the comparison is used to modify the control signals applied to the numerically controlled contour forming machine to provide compensation for part springback. Further, a manual signal modifying mechanism is provided for inserting modifying signals also adapted to modify the control signals to compensate for part springback.

REFERENCES:
patent: 3145756 (1964-08-01), Hill
patent: 3352136 (1967-11-01), Clarke
patent: 3459018 (1969-08-01), Miller
patent: 3835687 (1974-09-01), Kubota et al.

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