The research purpose of this paper is to analyze the negative torque problem of the main drive of the nine rolls cold straightener,and propose an optimization scheme.This article deduces the influencing factors of torque during the steel plate straightening process through theoretical analysis.Taking a typical case as an example,it calculates and analyzes the negative torque of each roller of a nine roll cold straightening machine,and proposes an optimization plan for its main transmission system.The straightening torque is mainly caused by the different bending amounts of each roller under the condition of group transmission,resulting in inconsistent straightening speed of the steel plate.It is mainly related to the elastic model E of the steel plate,the size of the steel plate,and the setting of the reduction amount.It was found through calculation that negative torque mainly occurred on the 2nd,8th,and 9th straightening rollers,with the 3rd straightening roller having the largest increase in torque,followed by the 7th straightening roller.After the main drive system is optimized,the drive devices of each straightening roll are independent from each other,and the straightening speed of single roll can be set freely,which can not only eliminate the negative torque problem,but also realize the micro tension straightening of thin plates.
StraightenerRolls cold straighteningNegative torqueMain transmission system
维普
万方数据
