Research on constant torque control method for electric impact wrench

doi:10.16731/j.cnki.1671-3133.2024.07.019

Abstract

Abstract: The constant torque control of electric impact wrench was studied.Firstly,the collision model and torque accumulation model of electric impact wrench were established,and the factors affecting the torque output of wrench were analyzed. A constant torque control scheme based on impact times and impact block speed was proposed. At the same time,the collection scheme of impact times and the speed control scheme of double closed-loop DC brushless motor based on fuzzy PID were designed.Verified on the torque test platform of electric impact wrench,the results show that the torque control accuracy of the wrench can reach within ±4 % when the impact times are 200 times. The constant torque control method has the characteristics of high control accuracy,low cost and convenient operation. The feasibility of this method was verified by practical application.

Key words: electric impact wrench, constant torque accumulation model, torque control, bolt tightening

CLC Number:

TP393

LIU Xingchen, XIE Feng, WANG Xiaowu, WU Huanle. Research on constant torque control method for electric impact wrench[J]. Modern Manufacturing Engineering, 2024, 526(7): 152-159.

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