方形波アーク溶接法による Al 薄板の溶接

概要

論文の詳細を見る
A rectangular wave shape TIG AC power source with transistorized switches has been developed. The depth of bead penetration of thin Al plates welded by this power source has been examined. Also, butt welding of thin Al plates has been carried out using conditions determined through examination of the depth of bead penetration. The characteristics of this power source is as follows : no-load voltage 72V, maximum welding current 230A, Welding frequency 25Hz∿1k Hz, SP/RP ratios 1∿9. Under the conditions of i_<rms> 100∿230A, welding frequency 25Hz∿1k Hz, SP/RP ratios 2∿6,welding speed 500∿600mm/min, arc length 1.5mm and shielding with Ar gas, the depth of bead penetration of 3.2mm thick 5052 Al alloy is constant at welding frequency 25Hz to 1k Hz and two times deeper than in the case of sine wave TIG welding, and also increases in proportion to the increase of SP/RP ratio. Welded joints with good mechanical properties are obtained using this power source. The appearance of the beads is excellent with the many regular ripple marks.
社団法人溶接学会の論文
1978-11-05