LEFT/RIGHT WEAVING WIDTH CORRECTION METHOD IN AUTOMATIC TUBE CIRCUMFERENCE WELDING MACHINE

Japanese Patent JP3812914

B2

PROBLEM TO BE SOLVED: To precisely conduct control of an automatic tube circumference welding machine.
SOLUTION: When conducting whole circumference welding to end faces of two tubes by pulse MAG welding method, two dimensional weaving of torch is conducted along a groove of a tube. In this case, electric current pulse cycles at left/right ends of weaving (161) as well as arc short circuiting times at left/ right ends (143) are obtained, based on the obtained arc short circuiting times at left end/right end, the left/right pulse cycles are respectively corrected (163), a larger one of the corrected electric current cycles at each end of left/right is made to a correction electric current pulse cycle, the corrected electric current cycle is compared with an upper limit value and lower limit value decide beforehand, a weaving width is corrected so that a left/right weaving width in the part is decreased in the case of being larger than the upper limit value and a left/right is increased in the case of being smaller than the lower limit value (147).

JP5851694	Cylindrical welding forming method and welding equipment
JPS58137576	【考案の名称】溶接制御装置
JP2008080354	AUTOMATIC WELDING DEVICE

Takashi Anamizu
Yuichi Manki
Seiji Mizukami
Mibu raw man
Kenichi Maeda

JP35765896A

August 23, 2006

December 29, 1996

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Tokyo Gas Co., Ltd.

B23K9/12; B23K9/173; B23K9/00; B23K9/028; B23K9/09; B23K9/095; B23K9/127; (IPC1-7): B23K9/127; B23K9/00; B23K9/028; B23K9/09; B23K9/12; B23K9/173; //B23K9/095

Atsushi Watanabe

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