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中文摘要：
针对现有研究未考虑张力对螺旋弹簧成形及回弹影响的问题,建立受张力影响的螺旋弹簧成形及回弹理论;讨论当簧丝受弯矩和张力共同作用时,弯矩与簧丝横截面应力、张力与簧丝横截面应力、回弹比与张力的关系;通过大型非线性有限元分析软件ABAQUS 6.8实现不同张力下螺旋弹簧冷绕成形过程的数值模拟。理论计算与模拟结果均表明：张力不同会导致弹簧最终回弹量的不同;张力越大,簧丝在卸载时越容易保持成形时的形状,回弹量越小;实际生产弹簧时,在除张力外的其他参数不易改变的情况下,可通过增大或减小张力的方法来减小或增大回弹量。
英文摘要：
Since there is no research about the forming and springback of helical springs considering the influence of the tensile force,the theory of it was established.The relationships between the bending moment,tensile force and the stress within the cross-section of spring wire respectively along with the relationship between the ratio of springback and the tensile force were discussed by applying the bending moment and tensile force together.The forming process numerical simulations of helical springs at different tensile forces were carried out by employing the large non-linear finite element analytical software ABAQUS 6.8.The results show that the springback is different when applying different tensile forces during the winding process.The larger the tensile force is,the smaller the springback is.Under the condition,it is easier for the spring wire to keep the shape being formed.For the helical springs in the course of being cold-coiled,when the other parameters are not easy to be altered except the tensile force,it is capable of increasing or decreasing it to decrease or increase the springback,respectively.
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