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Abstract: All
kinds of mechanics factors are considered synthetically. A mathematics
model about keyhole conformation and heat transfer of double-side arc
welding is established. The body-fitted coordinates are adopted in
processing complex buddle surface and boundary between keyhole and
buddle. The simulate results show that full penetration is prerequisite
to perforation. The perforating speed after fully penetrating is far
higher than that of before fully penetrating. The time need for fully
penetrating, perforating and the span between full penetration and
perforation increases with the thickness of plate increasing. The
shortest span varies very small, thus the shortest span can be used as
an evaluate object. The heat input are more concentrated around the
centerline of the arc because of the keyhole, thus the workpiece free of
groove can be fully penetrated using smaller heat input.
Key words: Double-sided
arc welding Full penetration Heat transfer Keyhole
CLC No: TG44
TG115
美国国家自然科学基金(DMI
9812981)和哈尔滨工业大学现代焊接生产技术国家重点实验室开放课题资助. Received 20030108, received in
revised form 20030414
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