This paper describes the methods of controlling the frame quality in terms of process design, mould design, control of deformation and defects from welding surface treatment, etc.

从工艺设计、胎具设计、控制焊接变形和缺陷、表面处理等各环节实行严格的品质控制，多年来生产出多种型号的车架全部为合格品。

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This paper interprets the short-circuit arc welding process and the process stability. The evaluation methods and criteria for the short-circuit arc welding process are introduced and discussed.

简述了短路电弧焊接的物理过程及过程稳定性概念，介绍了有关短路焊接过程稳定性各种评价方法及相应准则，最后对其进行了必要的讨论。

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Some methods used in the control of welding deformation, such as reverse deformation, system analysis, controlling process parameters and temperature field, are introduced.

同时介绍了控制焊接变形的几种方法，如反变形法、控制工艺参数、控制温度场以及系统综合分析等。

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