滚珠丝杠副精度保持性试验装置及加载方案研究

Study of Horizontal Testing Program for Accuracy Retention of Ball Screw

滚珠丝杠副的精度保持性对数控机床的加工精度稳定性与高精度加工持久性有重大影响。采用电涡流制动器加载螺母的方案,设计了一套滚珠丝杠副精度保持性测量装置,解决在大载荷运动过程中对滚珠丝杠副实际工况的模拟及传感器数据实时采集等难题。在此基础上,对滚珠丝杠副精度保持性的试验方法进行了研究。结果表明该试验装置具有加载载荷大,实际工况仿真度高,被测件易拆卸装配,测量精度高,适用范围广的优点;该试验方法能够较好地完成精度保持性的测量及验证,对同类产品试验方法的研究也具有指导意义。

The accuracy retention of ball screw has important influence on stability and persistence of processing accuracy of CNC. The loading program of Eddy current damper is used to design a testing device for precision preservation of the ball screw to solve the problem existing in simulating the actual working conditions of the screw with large load, sensor data real-time acquisition and so on. On this base, this paper studies the testing method for accuracy retention of the ball screw. The result shows that the testing device has the advantages of largely applied load, high degree of simulation, DUT easy disassembly and assembly, high accuracy, wide application and the testing method can be used to complete the accuracy retention test preferably, and it is of the guiding significance for the study of similar products＇ testing method.