The Study On The Method Of Non-contact Error Detection Of Worm

Planar double enveloping worm is an important form in the transmisson area, the characteristics of multi-tooth engagement and instantaneous double contact line endows it with advantages of large load capacity, high transmission efficiency and good machinability etc. More and more scholars and enterprises have shown interest in it, and it's getting more and more applications in the production practice of the industries.As the tooth surface structure of plane double enveloping worm is complex and the tooth profile and thickness measurement is comparatively difficult. Many faults and obstacles still exist in traditional detection methods. so the new detection technology is immature and needs further research and development.Based on the analysis and research of the non-contact detection technology, the measuring method adopting the planar array CCD is briefly analyzed for its feasibility and validity. The forming principle of the plane double enveloping worm is analyzed, the worm tooth surface equation is obtained and discrete model of the theoretical contact line is also determined. Combing the techniques of CCD, DSP and digital image processing etc, the overall scheme of the detection system is designed and the detection principle and process are expounded. Based on the former theoretical research, the image processing algorithm is further analyzed and optimized. Research is carried out on the accurate positioning of CCD, and the method is proposed to realize accurate position through image digital processing and validated in the experiment. The tested worm and the CNC grinding machine are given joint detection and the images collected are analyzed to obtain the related errors.