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Abstract: For
pure aluminum of middle-thickness, by means of comparing experiments of
one-sided TIG and MIG arc welding with experiment of double-sided
TIG-MIG symmetrical arc welding, and using ANSYS finite element
calculation software to simulate weld pool, characteristics of welding
pool and regularity of weld shaping for TIG-MIG double-sided symmetrical
arc welding are investigated. Research results show that static
accumulation effect and dynamic positive heat resistance effect of
thermal source for TIG-MIG double-sided symmetrical arc welding can
greatly increase depth of fusion. With welding process crossing of weld
pool of TIG and MIG will appear. This pool will achieve balance under
acting of arc force, surface tension and gravity, and inverse weld
shaping is obtained. Stability of cross pool decides inverse shaping of
TIG-MIG weld.
Key words: Aluminum
TIG-MIG Double-sided symmetrical arc welding Mechanism of
shaping Numerical simulation
CLC No: TG444+.74
国防预研跨行业基金(00J18.4.1.CB0204)和江苏省船舶先进设计制造技术重点实验室资助项目.
Received 30217, received in revised form 20031027
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