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WAN Daping
HU Dejin
WU Qi
School of Mechanical and
Power Engineering,
Shanghai Jiaotong University,
Shanghai 200030, China
ZHANG Yonghong
School of Information and
Communication,
Nanjing University of Information
Science & Technology,
Nanjing 210044, China
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ONLINE GRINDING WHEEL WEAR
COMPENSATION BY IMAGE BASED MEASURING TECHNIQUES*
Abstract:
Automatic compensation of grinding wheel wear in dry grinding is accomplished by an image based online measurement method. A kind of PC-based charge-coupled device image recognition system is schemed out, which detects the topography changes of the grinding wheel surface. Profile data, which corresponds to the wear and the topography, is measured by using a digital image processing method. The grinding wheel wear is evaluated by analyzing the position deviation of the grinding wheel edge. The online wear compensation is achieved according to the measure results. The precise detection and automatic compensation system is integrated into an open structure CNC curve grinding machine. A practical application is carried out to fulfil the precision curve grinding. The experimental results confirm the benefits of the proposed techniques, and the online detection accuracy is less than 5 μm. The grinding machine provides higher precision according to the in-process grinding wheel error compensation.
Key words:
Grinding wheel Wear Compensation Online measurement Charge-coupled device (CCD)
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