A unified geometric modeling method of process surface for precision machining of thin-walled parts

摘要：

　　Thin-walled parts are widely used in aerospace,ships and automotive fields.However,due to the characteristics of multi-process and multi-procedure manufacturing technology,the production efficiency and machining precision of those parts are greatly limited.In this paper,a unified geometric modeling method for precision machining of thin-walled parts is presented.The unified model is established to represent the polymorphism of process surface for every stage in the whole machining process.Then with four variables,including design surface model,process surface model,offset transform and localization transform as well as the interactions among them,different application problems are described,which reveal the common mathematical essence.Firstly,for the process design of thin-walled parts,non-uniform allowance optimization design method is proposed based on the stable process stiffness.Secondly,for the rapid clamping and localization of thin-walled parts,a method of alignment localization with constraints and allowance optimization is presented for the near-shape blank.Thirdly,for the machining process controlling of thin-walled parts,a modeling and compensation method of elastic deformation error is developed in the multi-axis NC machining.Finally,several examples show that the geometric modeling method is feasible and the results can carry high precision and efficiency for thin-walled parts.

关键词： Process geometric model allowance optimization design stable process stiffness constraint alignment error compensation

作者: Ying Zhang Dinghua Zhang Baohai Wu Jianhua Yang

作者单位: Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education Northwestern Polytechnical University Xian 710072, China

会议类型: 国际会议

会议名称: 2013 International Symposium on Assembly and Manufacturing(2013装配与制造国际专题会议)

会议地点: 西安

会议语种:英文

页码: 285-287

在线出版日期: 2013-07-01（万方平台首次上网日期，不代表论文的发表时间）