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《Acta Armamentarii》 2003-01
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A STUDY ON SOME KEY TECHNIQUES IN THE STRUCTURAL DYNAMICS OPTIMAL DESIGN OF A NC INTERNAL GRINDER

Hu Rufu Sun Qinghong Chen Nan Chen Xin Mao Haijun (Department of Mechanics, Southeast University, Nanjing, 210096)  
Structural dynamics optimal design is an effective approach to improve the machining accuracy of machine tools. Some key techniques in the structural dynamics optimal design of NC internal grinder are analyzed, including structural dynamics optimal design of components applying sensitivity analysis, the setting up and correction of finite element(FE) model of combined surfaces between components, optimization of the spindle system applying BP neural networks model, the application of multi tuned mass damper(MTMD)with distributed frequencies to restrain vibration. The NC internal grinder MK2120A so designed has higher accuracy. The grinding accuracy reaches the following results: roundness 0 0008~0 0011mm, cylindrical error 0 0015mm, surface roughness Ra 0.1 μm, grinding vibration stripes are eliminated, and the weight of the whole grinder is greatly reduced. These will also be of benefit in guiding the structural dynamics optimal design of other machine tools.
【Fund】: 江苏省九五重大科技攻关资助项目 (BG980 0 6 2 )
【CateGory Index】: TG581
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