针对内循环滚珠丝杠副中滚珠与反向器之间碰撞和摩擦易导致反向器失效的问题,以减小滚珠与反向器之间接触碰撞力和摩擦力矩为目标,正弦曲线和五次抛物曲线叠加权重比系数为设计变量,对现有反向器回珠曲线进行优化计算.在获得最优回珠曲线后,建立三维模型并进行多体动力学仿真分析.仿真结果表明:优化后的反向器回珠曲线有效的降低了滚珠与反向器之间的碰撞力和摩擦力矩,滚珠运行更加流畅,滚珠丝杠副的动态性能得到明显改善.%To avoid the return tube failure caused by collision and friction between recirculation ball and return tube in the internal recirculation ball screw,we optimized the existing ball-return curve of the return tube,aiming to reduce the collision force and friction torque between recirculation ball and return tube;we also optimized the ratio coefficient of the sine ball-return curve and the five parabolic ball-return curve.After obtaining the optimal ball-return curve,a 3D model was built and the simulation analysis based on the multi-body dynamics was further carried out.The analysis results show that the optimized ball-return curve of the return tube can effectively reduce the collision force and friction torque between recirculation ball and return tube,and that the ball-return smoothness and dynamic behavior of the recirculation ball screw were obviously improved.
展开▼
