【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。更多还原

【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.更多还原