B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 11/02 (2006.01) B21D 7/025 (2006.01) B21D 7/14 (2006.01) B21D 9/12 (2006.01)
Patent
CA 2076418
A pipe bending machine has a bending template (10) around which a pipe (13) is bent. The bending template (10) is provided with a position sensor (32) that detects the bending path in dependence on the rotational position. A pushing device (17) engages the unbent portion (13a) of the pipe and urges the same towards said bending template (10). The pushing device (17) is provided with a position sensor (30). The position signals (PS1, PS2) of the two position sensors (32, 30) are compared in a control circuit (41) and an actuation signal (SS) is generated for controlling a pressure controller (42) to adjust the pressure of the drive (22) of the pushing device (17). The actuation signal (SS) is generated such that, in the case of equal position signals (PS1, PS2;), the drive (22) of the pushing device (17) is supplied with a pressure that determines the upsetting force exerted on the pipe.
Gowling Lafleur Henderson Llp
Schwarze Rigobert
LandOfFree
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