Process and a device for finding and following a hollow weld in

Details Process and a device for finding and following a hollow weld in Process and a device for finding and following a hollow weld in

1987-08-19

1990-06-19

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21912402, B23K 9127

Patent

active

049355970

ABSTRACT:
The invention concerns a process and a device for seeking and following a hollow weld during a shielded arc welding, especially welding with carbon dioxide gas. The welding torch is moved by a path-controlled manipulator, whereby prior to the welding the positional coordinates of one or more weld reference point of the hollow weld are found by mechanical contour probing and the actual position of the hollow weld found therefrom is saved in the path control. The lengthwise guidance is then done only through the appropriately corrected path control, only the height of the welding torch above the toe of the weld being adjusted in dependence on the welding current. The mechanical contour probing is done by contact sensing of the sides of the weld adjacent to the weld reference point, and the coordinates of the weld root point are computed from these data. For this purpose, the welding torch can swivel in its mounting and is provided with a switching disc which lifts away upon contact with the weld sides by deflection of the welding torch and sends a switching signal.

REFERENCES:
patent: 4249062 (1981-02-01), Hozumi et al.
patent: 4389561 (1983-06-01), Weman et al.
patent: 4525619 (1985-06-01), Ide et al.
patent: 4540869 (1985-09-01), Yasuoka
patent: 4636610 (1987-01-01), Kamo et al.

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