B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/65
B23K 9/09 (2006.01) B23K 9/12 (2006.01)
Patent
CA 1175496
M-14-26017M/KH/81 ABSTRACT OF THE DISCLOSURE A pulse arc welding machine in which, when any one of the material and diameter of a consumable wire electrode or the shielding gas used is varied, a peak current value and pulse width of a pulse current applied between a consumable wire electrode and a base material being welded as well as a wire feeding speed required for optimum welding conditions are automatically adjusted. The welding machine includes a consumable wire electrode, a wire feeding unit for the wire electrode, a base current source, and a pulse current source for supplying a pulse current superposed on the base current. A sensor detects the arc discharge voltage between the consumable electrode and the base material being welded. The quantity of heat applied to the electrode is corrected by comparing an output detection signal produced by the sensor with a preset arc voltage and then producing a pulse width instruction signal in response to the difference signal for setting the pulse width of the pulse current. When the detected arc voltage is large, the quantity of heat applied to the electrode by the welding current is decreased and the wire feeding speed is increased, while when the arc voltage is small, the quantity of heat applied to the wire electrode is increased and the wire feeding speed decreased.
381225
Mizuno Masanori
Mizuno Takaji
Tabata Yoichiro
Ueguri Shigeo
Mitsubishi Denki Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
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