矫直机主传动系统负转矩研究

Research of Negative Torque in the Main Transmission System of Straightening Machine

研究分析九辊冷矫直机主传动的负扭矩问题,并提出优化方案。通过理论分析推导钢板矫直过程中扭矩的影响因素,以典型案件为示例,计算分析九辊冷矫直机各辊的负扭矩大小,并对其主传动系统提出优化方案。矫直扭矩主要是由于在分组传动的条件下各辊压弯量不同,导致钢板矫直速度不一致引起的,其主要与钢板弹性模型E、钢板的尺寸及压下量的设定有关。计算发现负扭矩主要出现在第2、8、9号矫直辊,其中3号矫直辊扭矩增加量最大,7号次之。对主传动系统进行优化后,每根矫直辊的传动装置相互独立,可自由设定单辊矫直速度,不仅能消除负扭矩问题,还可实现薄板的微张力矫直。

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.