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论文类型：期刊论文

发表时间：2019-10-01

发表刊物：COMPUTER-AIDED DESIGN

收录刊物：EI、SCIE

卷号：115

页面范围：244-255

ISSN号：0010-4485

关键字：Surface morphology; Mating status; Centroid-driven algorithm; Assembly deviation estimation

摘要：The assembly precision of mechanical products is closely related to the morphology of the mating surface. In order to predict the assembly accuracy of high precision mechanical products efficiently, a calculation method of assembly deviation based on the real mating status is proposed. Firstly, the wavelet transform is used to decompose and reconstruct the mating surface morphology. Secondly, the two basic principles of the contact points of the mating surface are analyzed, and the virtual assembly model based on difference surface is established. Finally, the centroid-driven algorithm is proposed to calculate the real mating status, and the assembly deviation based on the mating status is characterized by small displacement torsors (SDT). By comparing the results of theoretical calculation and numerical analysis, the contact point position obtained by the two methods is almost consistent and the calculation error of assembly deviation is 6.83%. In addition, the centroid-driven algorithm has greatly improved the efficiency of assembly deviation estimation. In the assembly process of high-precision mechanical system, the content of this article can realize the accurate prediction of assembly deviation. (C) 2019 Elsevier Ltd. All rights reserved.