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汽車車身結(jié)構(gòu)點(diǎn)焊的數(shù)值模擬與試驗(yàn)
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    摘要:

    采用試驗(yàn)和有限元數(shù)值模擬的方法，對(duì)汽車車身低碳鋼電阻點(diǎn)焊的過程進(jìn)行了研究。利用電、熱、力有限元法對(duì)電阻點(diǎn)焊的過程進(jìn)行了模擬，得到了焊接電流、電極壓力等工藝參數(shù)及焊件厚度對(duì)熔核尺寸的影響關(guān)系，從而確定了其與接頭質(zhì)量的關(guān)系。模型初步實(shí)現(xiàn)了熱、電、力三者的耦合，得到的工藝參數(shù)對(duì)焊接接頭質(zhì)量影響的模擬結(jié)果與試驗(yàn)結(jié)果表明車身的試驗(yàn)?zāi)B(tài)模型以及計(jì)算模態(tài)模型能較好地吻合。

    Abstract:

    The resistance spot welding process of mild steel was studied by experimental and finite element methods. The results indicated that the relationship between process parameters (such as welding current, electrode force and plate thickness) and nugget size, from which the relationship between process parameters and the quality of joints has been derived. The results also showed the reason for expulsion through theoretical and FEM(finite element method) analysis by taking account of the effect of the contact state on thermal and electrode process. Electromagnetic thermal and structural fields have been carried out to verify the models established for analyzing spot welding, and the results showed that numerical simulation of spot welding is practicable.

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楊小衛(wèi),朱茂桃,袁月清,孫軍.汽車車身結(jié)構(gòu)點(diǎn)焊的數(shù)值模擬與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2007,38(8):155-158.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(8):155-158.

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