The structure of the underframe draft sill on railway passenger cars is improved through the process analysis and research in this article.The quality materials are selected and used and manufacturing methods are optimized to reduced cost,raise working efficiency and improve product precision and vehicle load capacity as well as prolony service life.This technique is widely applied to domestic and foreign vehicle manufacturing industry and the national invention patent is obtained.%通过工艺分析与研究,改进了铁路客车底架牵引梁的结构,选取了优质材料,优化了制造方法,降低了成本,提高了工作效率,产品精度有了很大提高,同时提高了车辆的承载能力,延长了使用寿命,现已广泛用于国内及出口车辆的制造,并获得了国家发明专利.
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