吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (1): 137-144.doi: 10.13229/j.cnki.jdxbgxb201701020

• Orginal Article • Previous Articles     Next Articles

Modeling and experiment of spatial geometric errors of hybrid serial-parallel machine tool

QU Xing-tian, ZHAO Yong-bing, LIU Hai-zhong, WANG Xin, YANG Xu, CHEN Hang-de   

  1. College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China
  • Received:2015-12-07 Online:2017-01-20 Published:2017-01-20

Abstract: The spatial geometric error of hybrid serial-parallel machine tool is modeled and investigated. This synthesis error model is based on multi-body system and the consideration of the combined effect of positioning errors, straightness errors, squareness errors and angular errors of each axis. With substantial data measured by laser interferometer, the distribution maps of some errors are drawn. By choosing a planned curve on the surface of workpiece and moving each axis with errors, the spatial geometric error appears and is illustrated on Matlab. Further, by decomposing the spatial geometric errors along each axis of spatial coordinate and comparing with position errors of the corresponding axis, a conclusion is drawn that both errors have close value and the same distribution trend. The positioning errors have the greatest impact on the synthesis error, followed by the straightness errors. The impact of the angular errors on the synthesis error can be ignored.

Key words: mechanical manufacturing automation, synthesis error model, geometric error, hybrid serial-parallel machine tool

CLC Number: 

  • TH161
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