Design and experimental study of a micro-groove grinding wheel with spray cooling effect

• Published in: Chinese journal of aeronautics Vol. 27; no. 2; pp. 407 - 412
• Main Authors: Shi, Chaofeng, Li, Xun, Chen, Zhitong
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2014
• Subjects: Boiling; Cooling; Cooling rate; Droplet; Droplets; Energy consumption; GH4169; Grinding; Grinding wheels; Heat transfer; High speed; Micro groove; Spray cooling; 冷却效果; 喷雾; 微槽; 砂轮; 磨削实验; 磨削效率; 设计; Spray cooling; Cooling; Droplet; Micro groove; Grinding
• ISSN: 1000-9361
• DOI: 10.1016/j.cja.2013.07.013

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 bowl- shaped 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.