In this paper, the evolution equations of the bearing and thread friction coefficients are proposed based on mechanical behavior of the bolted joint assembly. The study shows excellent correlation between the proposed model and the experimental results for the breakaway torque values in both the tightening and loosening directions. Evaluation of the torque-angle control of the tightening process is made, and a modified torque-angle control approach is proposed. The effect of friction coefficients on the error in the clamping force prediction is analyzed.

Issue Section:
Technical Briefs
Keywords:
assembling, clamps, fasteners, friction, machine bearings, threading machines, torque control, bolted joints, torque-tension relationship, thread friction torque, pitch
Topics:
Friction, Thread, Torque, Fasteners, Bearings
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Copyright © 2008
 by American Society of Mechanical Engineers
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