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CUI Can, GUAN Yao, ZHANG Guorui, XU Zhiqiang, LU Na. Influence of Tightening Strategy on Preload of Inertial Device Thread Connection[J]. Metrology Science and Technology. doi: 10.12338/j.issn.2096-9015.2021.0643
Citation: CUI Can, GUAN Yao, ZHANG Guorui, XU Zhiqiang, LU Na. Influence of Tightening Strategy on Preload of Inertial Device Thread Connection[J]. Metrology Science and Technology. doi: 10.12338/j.issn.2096-9015.2021.0643

Influence of Tightening Strategy on Preload of Inertial Device Thread Connection

doi: 10.12338/j.issn.2096-9015.2021.0643
  • Available Online: 2022-03-12
  • The general characteristics of the threaded connection of inertial devices are small size and high assembly accuracy.In this paper,a set of small-size screw tightening test device is developed to solve the problems of large pre-tightening force error and low control precision during the assembly process of small-size screws. Through the tightening process experiment of TC4 titanium alloy screws, the influence of the tightening strategy on the value and dispersion of pre-tightening force is analyzed, including torque-control method and angle-control method.The influence of threshold torque and step by step tightening on pre-tightening force is further studied. The results show that angle-control method can improve the control preload precision by about 7% compared with torque-control method. The selection of threshold torque of angle-control method has great influence on the consistency of preload. Step by step tightening can improve the control precision of torque-control method and angle-control method on pre-tightening force.
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