Method and apparatus for the lateral positioning of a member rel

Details Method and apparatus for the lateral positioning of a member rel Method and apparatus for the lateral positioning of a member rel

1983-09-15

1985-04-23

Shaw, Clifford C.

Electric heating

Metal heating

By arc

318576, 318653, B23K 912

Patent

active

045131953

ABSTRACT:
The invention relates to a method and apparatus for the lateral positioning of a member relative to a joint formed between two metal surfaces and having discontinuities.
Use is made of an eddy current sensor having at least two probes staggered in the direction of the joint. The signals supplied by each probe are processed separately to obtain a signal representing the lateral displacement. By comparing said signal with a given threshold below the amplitude of the signal in the presence of a discontinuity, it is possible to only transmit to a servomotor signals which are below this threshold, which correspond to an effective measurement of the lateral displacement.
Application is to automatic welding machines.

REFERENCES:
patent: 4206391 (1980-06-01), Varacins
patent: 4441010 (1984-04-01), Cornu et al.

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