Study On Roundness And Cylindricity Error Detection Method Of Precision Shaped Micro Rotational Parts

The roundness and cylindricity error is very important to measure the precision rotating parts of the index, many measurement methods generally parts size, but for the measurement precision of small parts are less, especially the method of measurement of small aperture surface is rare. The small aperture surface measurement is probe is used special processing, mainly for contact measurement, non-contact measurement method of small aperture surface did not check relevant information.This paper presents a new method to solve error detecting small parts aperture surface. Application of laser confocal measurement principle and laser confocal displacement sensor with micro rotating mirror with mirror into the measured pore size, internal measure and conversion precision shafting radial jumping error of measurement. The measuring principle of laser triangulation method using small parts of the cylindrical surface of cylindricity error measurement. The connecting precision bead shafting with circular grating sensor, computation in the process of measurement for each measuring point of the radial runout error value offset direction and shaft, partial eliminates implementation errors. The evaluation method of roundness and cylindricity error, puts forward a comprehensive evaluation method of roundness error.Method of measurement is designed in this paper has been successfully applied to the micro part roundness and cylindricity error detection, improves the detection accuracy, filling up the blank of small aperture surface non-contact measurement method.