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针对新造东风4 型机车车门漏风沙问题 ,分析了车体组焊过程中几点影响质量的因素 ,重点分析了机车车体侧蒙皮预拉伸对司机室门框的影响 ,合理地改进了预拉伸工序
In view of the leakage of sand on the door of the newly built Dongfeng 4 locomotive, the factors that affect the quality of the car body during the welding process are analyzed. The impact of locomotive body side skin pre-stretching on the cab door frame is analyzed emphatically. Stretching process