Development and Grinding Performance of a Pressurized Internal Cooling Slotted Grinding Wheel

doi:10.3901/JME.2017.19.187

Abstract

Abstract: In view of workpiece burnout in grinding of superalloy material,the intermittent grinding technology and pressurized internal-cooling method are combined and proposed to avoid the air barrier effect and then strengthen the heat transfer effect of coolant in grinding contact zone. The grinding wheel body,internal cooling system and the sealing structure are designed and verified based on numerical simulation method and 3D printing technology,subsequently a slotted CBN grinding wheel with pressurized internal-cooling system in surface grinding is prepared. Grinding experiments for nickel-based superalloy with different cooling methods,i.e. pressurized internal-cooling method and external spraying method,are carried out under the same grinding parameters. The influence of wheel method,grinding depth and workpiece feed rate on grinding temperature,surface roughness and surface topography are studied,the heat transfer enhancement of pressurized internal-cooling method in grinding contact zone is validated. The results indicate that using slotted grinding wheel with pressurized internal-cooling system can effectively enhance the heat transfer efficiency,reduce the grinding temperature and surface roughness,furthermore leads to better surface topography.

Key words: grinding surface quality, grinding temperature, intermittent grinding, pressurized internal-cooling, superalloy

CLC Number:

TG58

PENG Ruitao, ZHANG Shan, TANG Xinzi, CHEN Rui, ZHOU Zhuan. Development and Grinding Performance of a Pressurized Internal Cooling Slotted Grinding Wheel[J]. Journal of Mechanical Engineering, 2017, 53(19): 187-194.

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