Automatic cutting torch assembly

Details Automatic cutting torch assembly Automatic cutting torch assembly

1976-11-17

1977-10-04

Lake, Roy

Metallurgical apparatus

Means for cutting solid metal with heat, e.g., blowpipes

With means for cutting tubular workpiece

148 96, 219 60R, 219125R, 219125PL, 266 60, B23K 710

Patent

active

040520390

ABSTRACT:
The invention relates to an automatic cutting torch assembly for making cuts of any predetermined shape in a metallic pipe. Rollers are provided for the pipe to be processed which permit back and forth movement of the pipe. A photoelectric tracer unit and a cutting torch are mounted on a longitudinally extending bar which is also movable back and forth. The tracer unit and cutting torch are aligned with the axis of the pipe and are adjustable so as to be brought in close proximity to the pipe regardless of the size of the pipe. A pattern line is placed on the pipe and the tracking of the line by the tracer unit results in providing the correct cutting locus for the torch. A resolver unit senses the instantaneous angular position of the tracer unit and translates the sensed signal into two signals which correspond to the circumferential and angular components of the sensed angular position. The circumferential component signal is transmitted to a first servomotor which effects rotation of the pipe in either direction, as required, and the axial component signal is transmitted to a second servomotor which effects back and forth movement, as required of the beam which carries the cutting torch and the tracer unit. The two servomotors acting simultaneously cooperate so that the locus of the cutting torch is a replica of the tracked pattern line.

REFERENCES:
patent: 3430938 (1969-03-01), Blackburn
patent: 3704373 (1972-11-01), Bardwell et al.
patent: 3936714 (1976-02-01), Marshall et al.

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