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滚珠丝杆预紧力的确定

来源:http://www.jngongrun.com/ 日期:2022-07-26 发布人:admin

在滚珠丝杆副中对螺母施加预紧力,可以提高滚珠丝杆副的轴向刚度和定位精度。因此,若只考虑丝杆副的刚度及定位精度,显然是预紧力越大越有利,可以更好地消除由弹性变形所引起的轴向间隙。而过小的预紧力即使消除了轴向间隙,但不一定就提高了刚度。

The axial stiffness and positioning accuracy of the ball screw pair can be improved by applying preload to the nut in the ball screw pair. Therefore, if only the stiffness and positioning accuracy of the screw pair are considered, it is obvious that the greater the preload is, the more beneficial it is, and the axial clearance caused by elastic deformation can be better eliminated. However, too small preload does not necessarily improve the stiffness even if the axial clearance is eliminated.
因为预紧力能足以消除预紧螺母的“低刚度区”的存在。由于双螺母预紧段的丝杆与螺母元件间均存在有误差(如导程误差等),因而可能产生某一小段接触变形后紧些,其接触刚度就高,而某一小段接触变形后松些,则接触刚度低的现象。后者即所谓“低刚度区”。要提高轴向接触刚度,预紧力要足够大,以消除这种“低刚度区”的存在,才能达到提高轴向刚度的目的。
Because the pre tightening force is enough to eliminate the existence of "low stiffness zone" of the pre tightening nut. Because there are errors (such as lead error) between the screw rod and the nut element in the pre tightening section of the double nut, it may occur that a small section of the contact deformation is tighter, and its contact stiffness is higher, while a small section of the contact deformation is looser, and the contact stiffness is lower. The latter is the so-called "low stiffness zone". In order to improve the axial contact stiffness, the preload should be large enough to eliminate the existence of this "low stiffness zone", so as to achieve the purpose of improving the axial stiffness.
但是,过大的预紧力也是有害的,它会驱动力矩,降低传动效率,加剧滚珠与滚道之间的接触疲劳和磨损,缩短工作寿命。
However, too much preload is also harmful. It will drive torque, reduce transmission efficiency, intensify contact fatigue and wear between the ball and the raceway, and shorten the working life.
以上就是为大家介绍的有关导轨丝杠的详细的介绍,希望对您有所帮助.如果您有什么疑问的话,欢迎联系我们.我们将以的态度,为您提供服务http://www.jngongrun.com
The above is a detailed introduction about the guide screw for you. I hope it will help you. If you have any questions, please contact us. We will provide services for you with a professional attitude http://www.jngongrun.com

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