7 2016 7 No. 7 Modular Machine Tool & Automatic Manufacturing Technique Jul. 2016 1001-2265 2016 07-0122 - 05 DOI 10. 13462 /j. cnki. mmtamt. 2016. 07. 035 * 100124 TH166 TG659 A Precision Modeling and Analysis of Fixture System of Tenon Machining enter Based on Theory of Multi-body System LIU Zhi-feng ZHAO Lin-zhong LI Ying SUN Guang-hui MA Lei ollege of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology Beijing 100124 hina Abstract According to the appearance that the machining error of tenon machining center which is produced during working process the main error source of the analysis is the fixture system. The fixture system of tenon machining center uses the bolt positioning which affects the assembly accuracy of the whole fixture system and results in a large machining error. In order to derive the error formula of the assembly model and establish the error model of the fixture systemaccording to the mechanical structure and the connection mode proposing the method w hich is based on multi-body system kinematics theory and homogeneous translation. According to the use of bolt positioning w hich causes fault during w orking process and considering the particularity of the fixture system proposing a method that improves scheme of the fixture system for improving the machining accuracy of tenon machining center and establishes error model w hich is used multi-body system kinematics theory. Key words fixture system assembly accuracy multi-body system homogeneous translation error model 0 2 3 4 5 6 7 8 1 2015-09 - 06 * 863 SS2012AA040704 1973 AE E - mail lzf@ bjut. edu. cn
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