基于在线测量的滚动直线导轨副精度保持性测试方法及试验研究

Measurement method and tests for precision-keeping of a linear rolling guide based on online measuring

针对滚动直线导轨副精度保持性检测要求,提出了一种基于激光位移传感器测距的滚动直线导轨副运动精度在线检测方法。根据相对运动定理,该方法将4个激光位移传感器在线测量的滑块相对导轨基准的距离变化量转化成导轨平行度和滑块偏转角的变化量。通过滚动直线导轨副精度保持性测试方法,在线测量滚动直线导轨副在实际运行过程中的精度损失量,并与滚动直线导轨副的离线数据对比,有效验证了测试原理的可行性。随后,从多方面进行了误差分析。

Aiming at the checking demands of precision-keeping for a linear rolling guide,a online measuring method for measuring its motion accuracy based on laser displacement sensor was presented. According to the relative motion theorem,using the proposed method,the diatance variations between slider and guide measured with 4 laster displacement sensors were converted into the variations of the guid＇s level parallelism and the slider＇s deflection angle.Then the online loss of precision of a linear rolling guide in actual running process was measured with the proposed method,and the feasibility of the online measuring principle was validated effectively through comparing the measured results with the linear rolling guide＇s off-line data. Finally,error analysis was performed in many ways.