制动梁架整体成形工艺开发与技术实现
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forming process planning and technology realization of the monoblock break beam frame
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    摘要:

    为满足铁路货车运输对新型制动梁架产品性能的要求,在分析了制动梁架产品结构特点的基础上,提出了采用“模锻拉制”工艺成形制动梁架的新方法。对不同设计参数下制动梁架模锻预成形过程和拉制成形过程进行有限元模拟,获得了制动梁架预成形模的优化截面形状,发现金属局部“回流”是拉制过程中产生缩颈缺陷的主要原因,并据此确定拉制成形的最佳速度范围为87~96 mm/s。生产试制及产品检验表明,采用“模锻拉制”工艺成形整体结构的新型制动梁架是可行的。

    Abstract:

    In order to meet the performance demands of train lorry, a die forgingdrawing method based on structure features analysis was proposed to form the LA break beam frame. The finite element method was used to simulate a series of dieforging processes and the drawing processes with different parameters. The optimum crosssection shape of the performing die was obtained from these simulation results. It is found that local backflow of the metal is the primary cause of necking defects in drawing. Furthermore, the best drawing speed is determined to be from 87 mm/s to 96 mm/s. The results of trial manufacturing and product detection indicate that employing a die forgingdrawing process to form the monobloc break beam frame is feasible.

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陈锡侯,王梦寒,门正兴,温雪峰.制动梁架整体成形工艺开发与技术实现[J].重庆大学学报,2008,31(11):1247-1250.

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