簡要介紹大客車頂蓋總成的結(jié)構(gòu)特點及工藝要求, 通過焊接難點分析, 決定采用頂蒙皮的富氬CO2 自動連續(xù)焊和頂蒙皮與骨架間的電阻點焊新工藝, 以達(dá)到外觀和密封要求。
關(guān)鍵詞: 大客車; 頂蓋總成; 連續(xù)焊; 密封性; 富氬CO2 焊
Abstract: Th is article contains the brief introduction about the frame characteristics and the p rocess claim s of the coach′s roof assembly1 A nalyzing the w elding difficulty, the author decides to adop t a new w elding p rocess, that is, the automatically continuousMA G w elding used in roof sk ins and the resistance spot w elding used betw een roof sk ins
and roof frame. The active gas contains the rich argon and the rest carbon dioxide. In the end, the desired appearance and sealing performance are reached.
Key words: Coach; Roof assembly; Continuousw elding; Sealing performance; MA G w elding