【作者】 雷刚； 孙勇刚；

【Author】 Lei Gang Sun Yonggang (Chongqing Automobile College,Chongqing Institute of Technology,Chongqing 400050,China)

【机构】 重庆工学院汽车学院 重庆市车辆模拟与试验工程技术研究中心；

【摘要】 针对传统过盈设计中存在的可靠性问题,本文采用非线性有限元软件MARC分析了一款自卸车驱动桥壳的过盈接触问题;在此基础上,研究了过盈量对过盈配合处接触应力的影响,找出了桥壳安全配合过盈量的区间;在有限元结果的合理过盈量的区间内,依据优先配合原则,重新设计了公差配合;根据零件加工尺寸的"3σ"概率分布原则,以前面有限元仿真给出的失效区间为依据,计算了过盈配合公差改进前和改进后的配合可靠度。更多还原

【Abstract】 The nonlinear software MARC is adopted to analyze the tight fit of the self dumping driving axle housing in detail for the existent reliability of the traditional tight fit in this paper,on the base of this,the effect of interference closure to the contract stress is studied,the safety interference closure range is found;in the reliable interference closure range,according to the priority mate principle,the dimension tolerance is redesigned;according to"3σ"probability distribution principle,based on the former invalid range of the FEA result,the reliability of before and after approved tolerance dimension is computed.更多还原