Automatic Detection System For Defects On The Surface Of Tapered Roller

In tapered roller bearings, if there are such defects on the surface as flaws and stains, it will bring serious effect on bearing quality to directly result in reducing of service life for bearing. Therefore, in industrial production,100%defect detection shall be performed for roller surface. Currently, the detection of defects on the surface of tapered roller is still judged by manual detection method, i.e. the optometry is performed on the roller surface under the focus lamp by people. With development of the modern science and industry, the manual detection method has already can’t meet the requirements of practical application, so we need to research and development a kind of automatic detection system for defects on the surface of tapered roller.Aiming at the current problems of low efficiency and high cost when manually detecting the surface flaw of tapered roller, the automatic detection system based on machine vision is developed. Combining with the features of roller detection, the principle of automatic detection and work process are introduced. The design schemes such as automatic feeding device, unfolding device of Roller and automatic sorting device are proposed. In order to obtain clear and stable roller surface image, appropriate CCD camera and optical microscope are chose and at the same, the quality of lighting source shall be improved. The experiment shows that this program can achieve the desired results and realize real-time online detection for defects on the surface of roller in the state of motion.Experiment show that the system has the advantages of easy to operate, good real-time, high automation. This system can perform the detection with precision up to3μm for defects on the surface of roller with a diameter between6and15mm. The test results are accurate and has low mistake rate.