Study on the Reverse Engineering of a Double-face Cam
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摘要: 提出一种双面凸轮的反求设计和误差控制方法。从动件类加速度对轮廓曲线误差敏感,通过修正从动件类加速度曲线,以间接提高凸轮廓线精度。通过数字化测量,获得凸轮双面轮廓的点云数据,对点云数据进行精简并进行重构、装配对齐,获得凸轮轮廓实体模型。对获得的凸轮轮廓数据二次求导并拟合,获得从动件类加速度曲线和类加速度误差值。基于类加速度误差与从动件位移误差的关系函数,对轮廓线进行修正,从而消除反求误差。Abstract: A reverse design and error correction method for double-face cam is presented. Due to the fact that the type-acceleration of cam follower is sensitive to the cam profile curve error, the cam profile accuracy is improved through correcting the type-acceleration curve. Before the cam profile solid model is generated, the data cloud obtained from the digital measurement of the cam double-face profiles are simplified, reconstructed and justified. Based on the function of the acceleration error and the displacement error of the cam, the profile curve is improved by correcting the fitting error of the type-acceleration curve, which is the second derivative of the profile curve.
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Key words:
- cams /
- computer software /
- coordinate measuring machines /
- design
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[1] Dubravík Michal, Kender Štefan. Application of reverse engineering techniques in mechanics system services[J]. Procedia Engineering,2012,(48):96-104 [2] Bagci E. Reverse engineering applications for recovery of broken or worn parts and remanufacturing: three case studies[J]. Advances in Engineering Software,2009,(40):407–418 [3] 钟山,黄美发,李军,等.基于广义延拓逼近法的凸轮轮廓反求设计[J].机械设计,2007,24(9):11-14 Zhong S, Huang M F, Li J, et al. Reverse seeking design on cam contour based on generalized extended approximation method [J]. Journal of Machine Design,2007,24(9):11-14 (in Chinese) [4] 汪伟,杨建成,刘哲,等.基于MatLab的经编机钩针凸轮轮廓曲线反求设计[J].纺织学报,2008,29(11):55- 58 Wang W, Yang J C,Liu Z, et al. Reverse design used in crochet cam contour curve of warp-knitting machine based on MatLab[J]. Journal of Textile Research,2008,29(11):55-58 (in Chinese) [5] 贾正锋,梁海顺,刘锋,等.基于精度控制的凸轮反求实践[J].陕西科技大学学报,2009,27(4):88-92 Jia Z F, Liang H S, Liu F, et al. Practice of cam reverse based on precision control[J]. Journal of Shaanxi University of Science & Technology,2009,27(4):88-92 (in Chinese) [6] 杨东明.凸轮机构反求设计、误差分析及检测方法的研究[D].昆明:昆明理工大学,2002 Yang D M. Research on the RE, displacement error and testing method[D]. Kunming:Kunming University of Science and Technology,2002 (in Chinese) [7] 李新.反求工程模型重构及工程应用若干问题的研究[D].南昌:南昌航空大学,2010 Li X. Research on the model reconstruction and application of reverse engineering[D]. Nanchang:Nanchang Hangkong University,2010 (in Chinese)
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