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Journal of Tsinghua University(Science and Technology)    2020, Vol. 60 Issue (12) : 1023-1029     DOI: 10.16511/j.cnki.qhdxxb.2020.25.031
Mechanical Engineering |
Dynamics of a three-axis loading mechanism for machine tool reliability tests
Yutian WANG,Jiahao QIU,Jun WU*(),Binbin ZHANG
Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
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Abstract  

A high stiffness, high load loading mechanism was developed for machine tool reliability tests. A kinematics model was used to analyze a singularity in the motion and develop a dynamic model with the Jacobian matrix used to evaluate the speed transfer efficiency of the loading mechanism. The kinetic energy was modeled to define the inertia matrix and evaluate the acceleration. The results show that the three-axis loading mechanism has good acceleration in the Z direction and good isotropy in the XY plane. The acceleration provides sufficiently fast motion in the Z direction.

Keywords parallel mechanism      loading mechanism      dynamic model      dynamic evaluation     
Corresponding Authors: Jun WU     E-mail: jhwu@mail.tsinghua.edu.cn
Issue Date: 14 October 2020
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Yutian WANG
Jiahao QIU
Jun WU
Binbin ZHANG
Cite this article:   
Yutian WANG,Jiahao QIU,Jun WU, et al. Dynamics of a three-axis loading mechanism for machine tool reliability tests[J]. Journal of Tsinghua University(Science and Technology), 2020, 60(12): 1023-1029.
URL:  
http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2020.25.031     OR     http://jst.tsinghuajournals.com/EN/Y2020/V60/I12/1023
  
  
  
10.16511/j.cnki.qhdxxb.2020.25.031.T001

机构的几何参数和惯性参数

参数 数值 单位
R 280 mm
r 120 mm
lb 175 mm
la 135 mm
m 3.975 kg
m1 0.831 kg
m2 2.685 kg
  
  
  
  
  
  
  
  
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