绪论
[摘要]焊接是现代机械制造业中一种必要的工艺方法，在汽车制造中得到广泛的应用，由于点焊、气体保护焊、钎焊具有生产量大，自动化程度高，高速、低耗、焊接变形小、易操作的特点，所以对汽车车身薄板覆盖零部件特别适合，因此，在汽车生产中应用最多。在投资费用中点焊约占75％，其他焊接方法只占25％。
随着汽车工业的发展，汽车车身焊装生产线也在逐渐向全自动化方向发展，为了赶上国际水平，在提高产量的同时，要求努力提高汽车制造质量。众所周知，实现自动化的前提是零件的制造精度要很高，希望焊接变形最小，焊接部位外观要清爽，故要求焊接技术越来越高。我国面临加入WTO的机遇和挑战，焊接方面新技术的推广应用对汽车工业的品牌提升有极其重要的作用。
[关键字]    焊接  ； 焊装生产线  ； 自动化
现代商用车
[Summary] The welding is in the modern machine manufacturing industry one essential necessity, getting the extensive application in the automobile manufacture, because of the sp
ot welding , the shielded welding ,the rock drill welding has the product in a big way , the automation degree is high, high speed, low consumption, weld the characteristics of transform the small and easy operation, so overlay zero partses to the automobile carriage lamella special in keeping with, Therefore, applied in automobile produce at most .the spot welding approximately composes 75％，in the investment expenses ,other welding methods only account for 25％.
Along with the development of the automobile industry, the automobile body welds installs the production line also at the time of gradually to full-automatically turning the direction development, for the sake of catching up the international level, at raising the yield, request to work hard to raise the automobile manufacturing quantity .It is known to all, the premise that carry out the automation is the manufacturing accuracy of the spare parts and want to be very high, hoping to weld to transform minimum, weld the part external appearance to want the clearness, so request to weld the technique more and more high .The our country faces the opportunity and challenges of join the WTO, the welding aspect new technical expansion application to automobile industry of brand promote to have the very and import
ant function.