Electric heating – Metal heating – By arc
Patent
1986-12-15
1989-01-31
Shaw, Clifford C.
Electric heating
Metal heating
By arc
21913021, 219132, B23K 910
Patent
active
048017817
ABSTRACT:
A semi-automatic hot wier TIG (Tungsten Inert Gas) welding equipment comprising: a portable TIG arc torch; a portable filler wire feed torch; a hot wire switching power source for energizing the TIG arc torch, the filler wire feed torch and a base metal; a filler wire feeding device for feeding the wire to the wire feeding torch at a desired rate; a welding condition control device for controlling wire heating power so as to provide wire heating power commensurate to the wire feed rate; means for measuring the resistance value of the wire extension section between the terminal end of the wire and the terminal end of the filler wire feed torch; and means for controlling said filler wire feeding means to change the wire feed rate in response to the detected wire extension.
According to the present invention, the welding operations are performed while the filler wire feed torch is held in one hand and the TIG arc torch is held in the other hand, so that the position where the arc and wire are inserted can be desireably adjusted. Adjustment of the welding conditions such as regulation of the welding arc current and adjustment of wire feed rate can be readily performed during welding.
REFERENCES:
patent: 3549857 (1970-12-01), Needham et al.
patent: 3999697 (1976-12-01), Hill, Jr.
patent: 4533817 (1985-08-01), Makimaa
Hafuri Miharu
Hori Katsuyoshi
Kusano Kazuki
Myoga Toshiharu
Shinomiya Miharu
Babcock-Hitachi Kabushiki Kaisha
Shaw Clifford C.
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