扭转精度对扭杆弹簧强扭工艺的影响

Effect of Torsion Precision on Torsion Bar Spring Pre-setting Process

为了研究扭杆弹簧扭转精度对其强扭过程的影响,利用弹塑性理论对扭杆弹簧强扭过程进行了理论探讨,获得扭杆弹簧在屈服与塑性强扭工况下的断面应力、扭矩及残余应力等变化的数学模型.应用ABAQUS有限元软件对不同型号、强扭工况的扭杆弹簧进行数值模拟,分析了扭转精度对扭杆弹簧强扭效果的影响.结果表明,在强扭工艺允许范围内,扭转误差对扭杆弹簧强扭效果影响不超过5%.试验结果不仅验证了有限元模型的正确性,也得出扭杆弹簧强扭误差在不超过±1°工况下的强扭效果可近似等同的结论,此研究为扭杆弹簧强扭工艺的完善提供理论依据.

In order to study the effect of torsion precision on pre-setting process,the elasticplastic theory was used to discuss the pre-setting process of torsion bar spring. Then, a mathematical model changing with stress,torque and residual stress was obtained under yield presetting and plasticity pre-setting situation. The ABAQUS software was used to simulate torsion bar spring with different models and pre-setting situations,and the effect of pre-setting precision on torsion bar spring was analyzed. The results showed that the effect of torsion bar spring pre-setting process in the range of torsion error on pre-setting is less than 5%. The test data not only validates correctness of the finite element model,but shows that torsion bar spring with no more than ± 1°pre-setting error can be seen approximately equivalent. The results provide a theoretical reference for improving the process of torsion bar spring pre-setting.