Metal deforming – With indication of condition or position of work – product,... – Work drawn or extruded through die
Patent
1985-09-09
1987-03-17
Bray, W. D.
Metal deforming
With indication of condition or position of work, product,...
Work drawn or extruded through die
72 9, 72388, B21C 124, B21C 5100
Patent
active
046497269
ABSTRACT:
A system for determining the bend in a section of a pipe which comprises supporting the pipe section on a conventional pipe bending apparatus which consists essentially of a device for holding the pipe section in a relatively horizontal position, for maintaining a first end of the pipe section in a relatively fixed position and for exerting a transverse force against a second and opposite end of the pipe section for creating a bend in the pipe section between the two ends thereof; mounting a first transducer on the first end of the pipe section, the first transducer providing a variable voltage depending upon the angle of the first end of the pipe section relative to the horizontal, mounting a second transducer on the second end of the pipe section, the second transducer providing a variable voltage depending upon the angle of the second end of the pipe section relative to the horizontal, exerting a bending force at the second end of the pipe section to create a bend in the pipe section between the two ends thereof, converting the voltage produced by the first transducer into a first radio frequency signal whose frequency varies with the strength of the voltage produced by the first transducer, converting the voltage produced by the second transducer into a second radio frequency signal whose frequency varies with the strength of the voltage produced by the second transducer, receiving the first and second radio frequency signals in a receiver capable of determining the difference in frequency between the two signals, differentiating the two radio frequency signals in the receiver, and providing a readout based upon this differentiation in terms of the angular difference between the two ends of the pipe section.
REFERENCES:
patent: 3333445 (1967-08-01), Mergler et al.
patent: 3335588 (1967-08-01), Cummings
patent: 4196607 (1980-04-01), Youtsey et al.
Gilliland John R.
Hill Stanton R.
Hutchens Criswell G.
Trammell William M.
Bray W. D.
Dorman William S.
Trammell William M.
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