Design and experimental study of a micro-groove grinding wheel with spray cooling effect |
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Authors: | Shi Chaofeng Li Xun Chen Zhitong |
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Institution: | a School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China;
b China Precision Engineering Institute for Aircraft Industry, Beijing 100076, China |
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Abstract: | The effectiveness of grinding fluid supply has a crucial impact on grinding quality and efficiency in high speed grinding. In order to improve the cooling and lubrication, through in-depth research of self-inhaling internal cooling method and intermittent grinding mechanism, a new spray cooling method used in high speed grinding is proposed. By referring to the structure of bowlshaped dispersion disk, the grinding wheel matrix with atomization ability is designed; through studying heat transfer of droplet collision and the influence of micro-groove on the boiling heat transfer, grinding segment with micro-groove is designed to enhance the heat flux of coolant and achieve maximum heat transfer between droplets and grinding contact zone. High-speed grinding experiments on GH4169 with the developed grinding wheel are carried out. The results show that with the micro-groove grinding wheel just 5.4% of pump outlet flow rate and 0.5% of spindle energy is needed to reduce the grinding temperature to 200 ℃, which means the developed grinding wheel makes cooling high efficient and low energy consuming. |
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Keywords: | Cooling Droplet Grinding Micro groove Spray cooling |
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