题目：吉利缤越左前纵梁后部总成焊接工艺目录1.汽车纵梁及其焊接工艺..................................................................................................11.1什么是汽车纵梁....................................................................................................11.2汽车纵梁焊接工艺发展........................................................................................12.焊接操作工作要求..........................................................................................................12.1基本要求................................................................................................................12.2工作前要求............................................................................................................22.3工作中要求............................................................................................................32.4工作后要求............................................................................................................43.左前纵梁后部总成焊接操作..........................................................................................43.1连接左前纵梁后部本体总成和侧纵梁加强板.....................................................43.2连接左前纵梁后部外侧分总成和内侧分总成...................................................63.3加强左前纵梁后部内侧与外侧分总成焊点强度...............................................73.4填充左前纵梁后部分总成焊缝...........................................................................93.5连接左前纵梁后部加强板和后部分总成.........................................................103.6加强左前纵梁后部分总成与加强板焊点强度.................................................124.常历史问题及处理........................................................................................................134.1焊接过程常见问题...............................................................................................134.2常见问题处理.......................................................................................................14参考文献.............................................................................................................................14