考虑公差原则的零件公差分析方法研究

Parts Tolerance Analysis Method Study Considering Tolerancing Principle

零件的公差分析是产品公差设计中的重要环节,为提高机械产品质量和零件的互换性,在零件设计时需要考虑尺寸公差和形位公差的关系,即公差原则,而传统的零件公差分析方法很少考虑公差原则中的相关要求,难以对有相关要求的零件进行三维公差分析。针对上述问题,利用SDT理论对有相关要求的轴类零件进行三维公差数学建模,然后结合蒙特卡洛法实现了对此类零件三维公差分析。最后以花键轴为实例,对比了不同公差原则下的零件公差分析结果,验证了所述方法的有效性。

Tolerance analysis of parts is an important process in product of tolerance design,to improve the quality of mechanical products and parts interchangeability,relation betweengeometric tolerances and size tolerance need to consider when parts design,namely the principle of tolerance.Traditional method of tolerance analysis was rarely considered relevant requirements in tolerance principle,it is difficult to parts for 3D tolerance analysis which have relevant requirements. For the above problem,the 3D tolerance mathematicalmodel of shaft parts have related requirements was established by using SDT theory,then combined with the montecarlo method,and the 3D tolerance analysis of parts wasrealized. Finally,use the spline shaft as an example,the result of parts withdifferent tolerance principle tolerance analysiswascompared,and validityof the proposed method was verified.