复杂曲面零件的逆向重构与实际模型误差的研究

Research on Reverse Reconstruction of Complex Surface Parts and Actual Model Error

逆向工程又称逆向设计,是现代产品设计理论与方法的重要组成部分,是正向设计的扩展和补充,目前被广泛应用于汽车零部件、航空航天、模具、医疗等领域。为保证逆向重构数据的准确性,以复杂曲面零件来研究逆向重构的模型与实际模型的误差。提出了逆向重构与实际模型误差检测的方法,对零件使用扫描仪进行数据采集,Geomagic软件进行点云处理,UG软件进行逆向重构,最后将逆向重构完成的三维模型和采集的点云数据进行比较,分析逆向重构的模型是否合格,对于零件的关键部位,采用实际测量和虚拟测量相结合的方法,分析逆向重构的模型与实际模型的误差,评估逆向重构完成的模型精度,结果发现满足要求,验证了逆向重构与误差检测方法的正确性。采用逆向工程工作方式可以高效地完成零件的模型,大大地降低了产品开发成本,同时也为其他产品的设计与制造提出新的设计思路。

Reverse engineering,also known as reverse design,is an important part of modern product design theory and method,as well as an extension and supplement of forward design.It is widely used in automotive parts,aerospace,mold,medical and other fields.In order to ensure the accuracy of reverse reconstruction data,the error between the reverse reconstructed model and the actual model is studied with complex surface parts.A method of reverse reconstruction and the error detection of the actual model is proposed.The scanner is used for data collection of the part,the Geomagic software is used for point cloud processing,and the UG software is used for reverse reconstruction.Finally,the threedimensional model completed by reverse reconstruction is compared with the collected point cloud data to analyze whether the reverse reconstructed model is qualified.The error between the reverse reconstructed model and the actual model is analyzed by combining actual measurement with virtual measurement,and the accuracy of the completed reverse reconstructed model is evaluated.The results show that the reverse reconstructed model meets the requirements,and the correctness of the reverse reconstructed and error detection method is verified.Using reverse engineering can efficiently complete the model of parts,greatly reduce the cost of product development,but also put forward a new design idea for the design and manufacture of other products.