Method of multi-layer welding

Details Method of multi-layer welding Method of multi-layer welding

1983-04-22

1985-04-02

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21912422, 21912512, 228 7, 228 9, 901 42, B23K 912

Patent

active

045089531

ABSTRACT:
A method of multi-layer welding in which the welding operation is performed according to a path of welding defined by interpolating a plurality of instructed points by a suitable line, the method being characterized by storing in a memory device the coordinates actually passed by a welding torch in the welding operation of the first layer at the instructed points and determining the welding path of the second and succeeding layers by adding a predetermined amount of shift to the actual detected coordinates stored in the memory device at the instructed points and interpolating the shifted coordinates by a suitable line. According to another aspect of the present invention, therefor provided is a method for controlling the locus of operation in the second and succeeding layers in a multi-layer welding operation by a teach/playback type robot including an arithmetic control mechanism the method being characterized by teaching an arcuate locus of operation of the first layer; utilizing as a parameter a shift width corresponding to the arcuate bead to be formed in the second and succeeding layers through an external input member; determining the direction of shift of the second and succeeding layers by calculating the inner product of the directional vector of a welding torch according to the teaching data of the first layer and a directional vector from a point on the arcuate locus of operation to the center of the arc; and calculating the locus of operation of the second or a succeeding layer from the shift direction and width by the arithmetic control mechanism.

REFERENCES:
patent: 4031369 (1977-06-01), Heaman et al.
patent: 4249062 (1981-02-01), Hozumi et al.
patent: 4448342 (1984-05-01), Abe et al.

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