Precision ball screw pair of movement is the major indexes of the test bench testing,but the existing testing means are more for offline testing with complex operation and great positioning difficulty.The design and development of a kind of ball screw pair movement precision of online measuring system can realize the online detection,and is of great significance to improve the detection efficiency and accuracy.The paper designs a kind of ball screw pair movement precision of online measuring system according to the hardware,principle,communication,measuring interface and structure of online measurement system and at the same time to use the 3 m laser stroke error measuring instrument to test the same root screw accuracy,and analyzes the measured values.Results show that,by comparing the designed online measuring system with the 3 m laser stroke error measuring instrument,the requirements of the former to the environment is lower,the accidental error of the former is smaller,and the measuring curve of the former is relatively smoother while the latter has more intensive measurement curve fluctuation,and that the measured curve characteristic value difference of both is less than 1 μm,in the range of allowable error.%滚珠丝杠副运动精度是试验台检测的主要指标,而现在的检测手段多为离线检测,操作复杂且定位难度较高.通过设计开发一种滚珠丝杠副运动精度在线测量系统,可以实现其在线检测,对于提高检测效率和检测精度具有重要意义.文章围绕在线测量系统的硬件、原理、通讯、测量界面与结构,设计了一种滚珠丝杠副运动精度在线测量系统,并与3m激光行程误差测量仪对同一根丝杠进行精度检测试验,对其测量值进行对比分析.结果表明:设计的在线测量系统与3m激光行程误差测量仪相比较,前者对环境要求不高、偶然性误差小,测量曲线相对平滑,而后者测量曲线波动比较密集;两者测量曲线特征值差值小于1 μm,在容许误差范围内.
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