制动系统不锈钢管端部精密成形工艺研究

目的改善铁路货车制动系统管系现有的连接方式,对不锈钢管端部进行精密成形,以得到力学性能较好的锻造接头。方法根据原有管系的连接方式及钢管塑性成形特点,提出对不锈钢管端部进行多工步镦挤的工艺方法。采用Deform-3D三维有限元模拟软件对工艺过程进行数值模拟,分析成形过程中锻件成形情况,以及锻件和模具的受力、温度、金属流动情况等。结果在高温条件下采用的多工步镦挤工艺可以使钢管端部达到成形要求。结论提出的钢管端部塑性成形工艺是可行的,对铁路货车制动系统管系连接方式的改善有重要的参考意义。

Precision Forming Process of Stainless Steel Tube Ends in Braking System

The paper aims to improve the existing pipe connection mode of the railway truck brake system, and forge the stainless steel pipe end to obtain forged joint with good mechanical properties. According to the connection mode of the original pipe system and the plastic forming characteristics of the steel pipe, a multi-step extrusion process was proposed for the stainless steel pipe end. The process-3D finite element simulation software was used to simulate the process, and the forging condition of the forming process, as well as the force, temperature and metal flow of the forging and die were analyzed. The multi-step extrusion process used under high temperature and high speed conditions could make the end of the steel pipe end meet the forming requirements. The plastic forming process proposed for steel pipe end is feasible. It has important reference significance for the improvement of the connection mode of the railway truck brake system.