High-precision measurement of inner and outer diameter of three-point bearings for precise displacement transfer
In this paper,based on the V-block angular line characteristic,combined with the grating precision displacement measurement technology,the inner and outer diameter of the bearing is detected through the precision displacement transfer method.This method detects the inner and outer diameters by measuring the spatial distance of three points of the diameter,there is no data fitting error in the calculation,and it can realize fast clamping for bearings with different curvatures,with high measurement efficiency and precision.Firstly,the mathematical model of displacement transfer based on this measurement method is deduced by establishing a coordinate system,which provides a theoretical basis for the accuracy analysis;then,the effects of the mounting error of bearing fixture,mounting error of lever sensor,tracing error of the maximum diameter of the bearing,and orthogonality error of the axis system of the displacement stage on the measurement accuracy are analyzed;then,the high-precision mounting of the bearing fixture is realized based on the proposed V-block angle-split line multi-point alignment method;finally,the experimental platform is set up to carry out the high-precision ring diameter inspection.Finally,the experimental platform was constructed and the high-precision ring gauge inside diameter measurement experiment was carried out.According to the actual inspection results of the high-precision ring gauges,it is shown that the accuracy of the system based on the measurement method for bearings with diameters of 75.000 4 and 24.999 4 mm is 0.68 and 0.69 μm respectively,which can satisfy the requirements for the inspection of the inner and outer diameters of precision bearings.
inner and outer diameter of bearingsV-blockprecision displacement stageprecision displacement transmission
万方数据
维普
