Investigation on Grinding Temperature and Heat Transfer Performance of Oscillating Grinding Wheel for High-efficient Green Grinding

doi:10.3901/JME.2022.15.105

Abstract

Abstract: Due to the low thermal conductivity and high specific strength of superalloy, it is easy to generate and accumulate a large amount of heat in the contact zone during the grinding process, which results in high grinding temperature and burn-out.Traditional flood-cooling technology and even high-pressure water jet technology are difficult to ensure the cooling effect of the grinding process.Based on the development concept of green manufacturing and clean production, an oscillating heat pipe grinding wheel is proposed.Its core idea is to use the phase change and cyclic movement of the working fluid of the oscillating heat pipe to timely, efficiently and stably dissipate the heat of the grinding zone to achieve dry grinding of superalloys.According to the heat transfer requirements of green grinding superalloys, the oscillating heat pipe grinding wheel is designed and manufactured.The heat transfer simulation and the experimental research on dry grinding of superalloys by oscillating heat pipe grinding wheel are carried out.Resultsshow that, compared with the grinding wheel without oscillating heat pipe, the heat transport capacity of the oscillating heat pipe grinding wheel is increased by 88.4%-96.6%, and 58%-79% of the grinding heat can be dissipated through the grinding wheel in time, thereby the grinding temperature is reduced by about 40%, and is controlled within 600℃.Because of its high heat transfer performance, the material removal rate of the oscillating heat pipe grinding wheel is increased by about 2.4 times compared with the grinding wheel without oscillating heat pipe.The oscillating heat pipe grinding wheel effectively controls the grinding burn by changing the heat partition behavior of the grinding zone, and realizes the high-efficient green grinding of superalloys.

Key words: grinding temperature, enhanced heat transfer, nickel-based superalloy, oscillating heat pipe grinding wheel, green grinding

CLC Number:

TG580

QIAN Ning, XU Jiuhua, FU Yucan, JIANG Fan, ZHANG Jingzhou. Investigation on Grinding Temperature and Heat Transfer Performance of Oscillating Grinding Wheel for High-efficient Green Grinding[J]. Journal of Mechanical Engineering, 2022, 58(15): 105-120.

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