A comprehensive study on capabilities and limitations of roller–screw with emphasis on slip tendency
A comprehensive study on capabilities and limitations of roller–screw with emphasis on slip tendency
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DOI：
10.1016/j.mechmachtheory.2009.04.001
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发表时间：
2009-10
影响因子：
5.2
通讯作者：
Y. Hojjat;M. Agheli
中科院分区：
文献类型：
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作者：
Y. Hojjat;M. Agheli
传动螺杆是一种将旋转转化为直线运动的机构。由于螺杆和螺母之间的滑动影响运动精度，所以采用滚珠丝杠和滚柱丝杠。滚珠丝杠的导程等于螺距，螺距通常在毫米量级，而滚柱螺杆可以提供很大范围的导程。本文综合研究了滚柱螺杆的性能和局限性，指出大引线和极小引线都是容易获得的。研究了螺杆旋转过程中作用在滚子上的力的滑移现象。对于零和螺距之间的小导程，滚子和螺杆在导程恒定和稳定的情况下具有相互滚动的固有倾向。此外，还对螺纹型面的优化进行了研究。对螺杆周围可能和允许的滚子数量进行了调查。实验结果表明，滚子丝杠具有灵活的导程和预期的精度，既可用于精密运动，也可用于粗略运动。
Transmission screw is a mechanism to convert the rotation into linear movement. Since sliding between screw and nut affects the motion accuracy, ball screws and roller–screws are used. Lead of a ball screw equals to screw pitch, which is usually in the order of millimeter while a roller–screw can present a wide range of leads. This paper comprehensively studies the capabilities and limitations of roller–screw and shows that large leads and extremely small leads are easily obtainable. The slip phenomenon has been studied regarding the forces acting on the roller during the rotation of screw. It is also shown for small leads between zero and pitch that the roller and the screw have inherent tendency to roll on each other with constant and stable lead. In addition, optimization of profile of threads has been studied. An investigation on the possible and permissible number of rollers around a screw has been carried out. The results of this study, confirmed by experiments, show that the roller–screw can be used for both fine and rough movement with flexible leads and desired accuracy.