轨道车辆减振器座焊接工艺

Welding technology of railway vehicle shock absorber bearing

轨道车辆减震器座由铝合金板材拼接而成,其结构焊接结构复杂,焊缝较多,且焊后残余应力较多。针对其MIG焊接工艺,通过试验测试和数值模拟的方法,得出焊接数值模拟方法的可靠性,并验证了目前现场使用的焊接工艺的合理性。进一步提出合理的焊接工艺。减振器座焊后残余应力测试采用盲孔法测试技术测量。减震器座数值模拟采用三维热弹塑性有限元法模拟焊接方法,焊接数值模拟软件为SYSWELD v2012,建立了轨道车辆减震器几何模型、热源模型与材料A7N01P-T4的力学模型。

The railway vehicle shock absorber is joined of aluminum alloy plate together,and it is complicated of welding structure, and weld is more, then the residual stress is more. Based on the MIG welding process,through experimental test and numerical simulation method, it is concluded that the welding numerical simulation method is reliability, and it is proved that the field use of welding technology is reasonable. And further put forward the reasonable welding process. The residual stress of the railway vehicle shock absorber is measured by blind hole method testing technology. Three dimension thermal elastic-plastic finite element method is adopted to simulate the welding process, and welding numerical simulation software is SYSWELD v2012, design the railway vehicle shock absorber geometry model, heat source model and mechanics model of the material A7N01P-T4.