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Guo E.,Nanjing University of Technology | Hong R.,Nanjing University of Technology | Hong R.,Jiangsu Key Laboratory of Digital Manufacturing for Industrial Equipment and Control Technology | Huang X.,Nanjing University of Technology | And 3 more authors.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2016

To reduce the tooth profile deviations of power skiving processing caused by machine setting parameters error, a mathematic model of power skiving for working internal cylinder gear was established based on the engagement principle of crossed helical gear. The relationships were obtained between machine setting parameters error and tooth profile deviations by the difference of error tooth profile and theoretical tooth profile. An error compensation method was proposed for solving the sensitive coefficient matrix of tooth error. The validity of this method for power skiving was numerically demonstrated as working an internal cylinder gear for example. The results show that the tooth deviations caused by machine setting parameters error are corrected and the accuracy is improved. © 2016, Central South University of Technology. All right reserved.


Fang C.-G.,Nanjing University of Technology | Fang C.-G.,Jiangsu Key Laboratory of Digital Manufacturing for Industrial Equipment and Control Technology | Huang X.-D.,Nanjing University of Technology | Huang X.-D.,Jiangsu Key Laboratory of Digital Manufacturing for Industrial Equipment and Control Technology | And 2 more authors.
Jisuanji Jicheng Zhizao Xitong/Computer Integrated Manufacturing Systems, CIMS | Year: 2014

Aiming at the twist problem of the additional radial motion in lead modification of helical gear, a tool path optimization method was proposed by adjusting simultaneous contact lines. The dynamic simultaneous contact line was solved accurately based on the gear engagement theory. The error analysis for deviations of enveloped tooth surface with respect to theoretical tooth surface in measuring circle was established and the tool path was optimized on engaging region though the least squared-error method. As an example of crowning gear, the proposed method was validated, and the results showed that the method could effectively eliminate the modified errors in measuring circle, as well as reduce the maximum thickness error on meshing region.


Hu W.-D.,Nanjing University of Technology | Huang X.-D.,Nanjing University of Technology | Huang X.-D.,Jiangsu Key Laboratory of Digital Manufacturing for Industrial Equipment and Control Technology | Zhang H.,Nanjing University of Technology | Guo E.-K.,Nanjing University of Technology
Jisuanji Jicheng Zhizao Xitong/Computer Integrated Manufacturing Systems, CIMS | Year: 2014

To establish the precise digital tooth surface containing the characteristics of topological modification in gear modification technology, a kind of tooth surface subdivision algorithm for a large number of unorganized points based on reconstruction of the given precision was presented. By preprocessing the large number of unorganized points which was taken as input, the initial mesh with certain approximation was constructed by using spiral growth algorithm. The initial mesh was segmented with the characteristics of Loop subdivision. According to the given precision, the minimum number of segmentation meeting the precision was estimated. The segmentation points was adjusted cross over and over again and making the reconstruction of tooth surface constantly close to the actual tooth surface after each segment. Through the error analysis of comparison between tooth surface reconstruction with actual tooth surface, the feasibility and accuracy of the algorithm were proved. ©, 2014, Editorial Department of CIMS. All right reserved.


Guo E.-K.,Nanjing University of Technology | Guo E.-K.,Jiangsu Key Laboratory of Digital Manufacturing for Industrial Equipment and Control Technology | Huang X.-D.,Nanjing University of Technology | Huang X.-D.,Jiangsu Key Laboratory of Digital Manufacturing for Industrial Equipment and Control Technology | And 4 more authors.
Jisuanji Jicheng Zhizao Xitong/Computer Integrated Manufacturing Systems, CIMS | Year: 2014

To improve the accuracy of tooth-trace modification, the simultaneous contact lines were obtained accurately in accordance with the space engagement theory and its relationship with respect to tooth trace modification grinding wheel setting parameter were discussed. A conclusion was drawn that the twist of modified tooth could be improved by adjusting the grinding wheel setting angle. According to the mathematic model for error evaluation of modified tooth surface in form grinding process, a contact lines optimization method was proposed based on changing wheel and work-piece setting parameters, and a case of drum tooth-trace modification was used to validate the proposed method. The results showed that the method could eliminate the twist of crowning helical gears and reduced the corrected errors.

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