在机床使用和维修中，时常发现滚珠丝杠振动增大、丝杠和螺母滚道局部磨损，并产生沟痕，有的仅使用一两年，沟痕就深达3-5μm，个别的滚道或滚珠局部表面出面剥离点。因而影响滚珠丝杠的导程精度，降低了精度寿命。

During the use and maintenance of machine tools, it is often found that the vibration of the ball screw increases, local wear of the screw and nut raceway occurs, and groove marks are produced. Some of them can be as deep as 3-5 after only one or two years of use μ m. Individual raceways or balls may have peeling points on their local surfaces. As a result, it affects the lead accuracy of the ball screw and reduces the accuracy life.

滚珠丝杠产生的振动，磨损的因素很多，如使用环境、机构设计、机构刚性、制造质量、润滑与防护等。但是滚珠丝杠的装配精度，也是保障滚珠丝杠的导程精度性能的重要因素。现在就有立式车床、NC车床维修中，对其装配精度的控制及其效果。

The vibration and wear caused by ball screws are influenced by many factors, such as operating environment, mechanism design, mechanism rigidity, manufacturing quality, lubrication and protection. However, the assembly accuracy of the ball screw is also an important factor in ensuring the lead accuracy performance of the ball screw. There are now vertical lathes and NC lathes in maintenance, which control the assembly accuracy and its effectiveness.

导轨丝杠厂家认为，事实证明，产生上述原因的滚珠丝杠弯曲着直接关系。

The manufacturer of the guide screw believes that it has been proven that the bending of the ball screw is directly related to the above reasons.

如支撑滚珠丝杠比轴承座和螺母的定位精度不好，对滚珠丝杠螺纹轴线的同心度、倾斜度偏差过大；滚珠丝杠螺纹轴线对导轨面的直线导向平行度；螺母定位面对螺母安装端面的垂直度等偏差，在装配时如若调整控制不当，必将使滚珠丝杠产生弹性弯曲变形。

If the positioning accuracy of the supporting ball screw is not good compared to the bearing seat and nut, the deviation of the concentricity and inclination of the thread axis of the ball screw is too large; The parallelism of the ball screw thread axis with respect to the straight-line guidance of the guide rail surface; If the perpendicularity and other deviations of the nut positioning face to the nut installation end face are not properly adjusted and controlled during assembly, it will inevitably cause elastic bending deformation of the ball screw.

增加滚珠丝杠和螺母间颠覆力矩，螺母承受径向负荷增大，部分滚珠在局部滚道上相互挤压、摩擦负重加重。因此引起回转振动增加，滚道局部发生异常磨损，影响滚珠丝杠导程精度和损伤其精度寿命。所以在装配和维修中注意装配零件，相关部件的精度和装配定位精度，提高滚珠丝杠装配精度，是十分重要的。

By increasing the overturning torque between the ball screw and the nut, the nut bears an increased radial load, and some balls squeeze against each other on local raceways, resulting in increased frictional load. Therefore, it causes an increase in rotational vibration and abnormal wear in local areas of the raceway, affecting the accuracy of the ball screw lead and damaging its accuracy and lifespan. So it is very important to pay attention to the accuracy of assembly parts, related components, and assembly positioning accuracy during assembly and maintenance, and improve the assembly accuracy of ball screws.

滚珠丝杠在制造过程中装配相关部位的精度，均按标准执行。在装配和维修中应该进行复检，记录实际值。然后检测装配零件相关部位精度，在一般情况下，按照滚珠丝杠精度实际值缩小1/2-1/3，进行调修和控制装配零件的相关部件精度。

The accuracy of the assembly of relevant parts of the ball screw during the manufacturing process is carried out in accordance with national standards. During assembly and maintenance, a re inspection should be conducted to record the actual values. Then, the accuracy of the relevant parts of the assembly parts is checked. In general, the actual accuracy of the ball screw is reduced by 1/2-1/3, and the accuracy of the relevant parts of the assembly parts is adjusted and controlled.

支撑滚珠丝杠两端的轴承座定位精度，是确定丝杠螺纹轴线，其导轨面直线导向的平行度，期偏差控制在13-23μm范围之内。由于固定轴承所使用的普通锁紧螺母及锁紧垫圈，其端面平行度和对丝杠支撑轴径的垂直度较差，均改用精制的或用修磨的方式，保证其垂直度，偏差控制在丝杠支撑轴颈肩面对滚珠丝杠螺纹轴线的跳动实际偏差值的2/3以内。

The positioning accuracy of the bearing seats supporting both ends of the ball screw is to determine the parallelism of the screw thread axis and the straight-line guide of its guide surface, with a deviation controlled between 13 and 23 μ Within the range of m. Due to the poor parallelism of the end faces and verticality to the diameter of the screw support shaft of the ordinary lock nuts and lock washers used for fixing the bearings, refined or polished methods are used to ensure their verticality, and the deviation is controlled within 2/3 of the actual deviation value of the runout of the screw support shaft neck shoulder to the ball screw thread axis.

这一点不可忽视的，否则轴承内外环运转中产生倾斜，使得滚珠丝杠弯曲。同样对固定轴承外环的压盖端面，或者传动齿轮固定轴承端面，亦应按上述方法调修，控制装配精度。

This cannot be ignored, otherwise the inner and outer rings of the bearing will tilt during operation, causing the ball screw to bend. Similarly, for the gland end face of the fixed bearing outer ring or the fixed bearing end face of the transmission gear, it should also be adjusted according to the above method to control the assembly accuracy.

由于滚珠螺母螺纹轴线对滚珠丝杠螺纹轴线，偏心倾斜偏差大，是使螺母承受径向负荷增大，滚珠互相挤压、摩擦负重加重的直接原因，所以对滚珠螺母定位精度要严格控制。为了稳定螺母的定位精度、防止螺母固定螺栓及定位锥锁，因受其振动而松动，还必须注意，固定螺栓要装有可靠的放松装置，定位键销要追加止退压板或顶丝。

Due to the large eccentricity and inclination deviation between the thread axis of the ball nut and the thread axis of the ball screw, it is the direct reason for the nut to bear an increased radial load, causing the balls to squeeze each other and increase the friction load. Therefore, the positioning accuracy of the ball nut must be strictly controlled. In order to stabilize the positioning accuracy of the nut and prevent the nut fixing bolt and positioning cone lock from loosening due to its vibration, it is also necessary to note that the fixing bolt should be equipped with a reliable loosening device, and the positioning key pin should be equipped with a stop pressing plate or top screw.

传动滚珠丝杠的联接，如若是齿轮或联轴器联接，其部位是在丝杠支撑轴颈外侧悬伸部分，装配时必须对轴径端头，用千分尺测量回转精度是否正常，以防止滚珠丝杠轴颈产生弯曲变形。更多相关事项就来我们网站http://www.jngongrun.com咨询！

The connection of the transmission ball screw, if it is a gear or coupling connection, is located at the overhanging part on the outer side of the screw support shaft neck. During assembly, it is necessary to measure the rotation accuracy of the shaft diameter end with a micrometer to prevent the ball screw shaft neck from bending and deformation. For more related matters, come to our website http://www.jngongrun.com consulting service