【作者】 王猛； 杜世昌； 肯特； 奚立峰；

【Author】 Wang Meng~1 Du Shichang~1 Ken Te~1 Xi Lifeng~1,2 1 School of Mechanical and Power Engineering,Shanghai Jiaotong University,Shanghai,200240 2 State Key Laboratory of Mechanical system and Vibration,Shanghai Jiaotong University,Shanghai, 200240

【机构】 上海交通大学机械与动力工程学院； 上海交通大学机械系统与振动国家重点实验室；

【摘要】 在多工序加工过程中,零件的尺寸误差不仅与当前工序有关,也受到上游工序的影响。研究尺寸误差在工序间的传递、累积、耦合规律,对降低误差波动、提高零件质量有着重要的意义。以往的研究侧重系统层面的误差流建模,忽视了对工序层面误差源(夹具误差和基准误差)的三维数学建模,因此难以在实际生产中应用。本文给出了夹具误差和基准误差的三维数学表达,建立了从系统层面到工序层面的全层次三维误差流模型,可实现多工序加工过程误差分析、诊断和质量控制。通过某工厂生产的B12系列发动机缸盖的加工过程验证了模型的有效性。更多还原

【Abstract】 In multistage machining process,the dimensional errors of the products are not only induced at current station,but also accumulate from upstream stations.Studying the rules of errors transmission,propagation and coupling phenomenon among stations would help reduce dimensional variation and improve product quality. However,previous literatures mainly focused on the overall modelling method at system level while did not pay due attention to the explicit three dimensional modelling of datum error and fixture error.Therefore,the variation propagation models cannot be applied in real production process,this paper develops three dimensional modelling of fixture error and datum error and builds an all-layer three-dimensional variation propagation model which can be used for error analysis,diagnosis and quality control in multistage machining process.The effectiveness of the model is validated by an example of B12 car engine cylinder head machining process.更多还原