Temperature Field Model and Verification of Titanium Alloy Grinding under Different Cooling Conditions

doi:10.3969/j.issn.1004-132X.2021.05.009

Abstract

Abstract: To overcome bottlenecks of insufficient heat capacity for atomizing air carrying nanofluids in grinding zone, a new process coupled with cryogenic air and nanofluid minimum quantity lubrication was proposed. A finite difference model of temperature field was established. Temperature fields of grinding zone with three cooling methods such as cryogenic air, nanofluid minimum quantity lubrication, and cryogenic air nanofluid minimum quantity lubrication were numerically simulated. The results show that cryogenic air nanofluid minimum quantity lubrication has the strongest heat transfer capacity, followed by cryogenic air, and nanofluid minimum quantity lubrication is the weakest. Moreover, the temperature field of surface grinding was verified under three cooling method experiments with Ti-6Al-4V as workpiece. The model error is less than 5%, which verified accuracy of the theoretical model.

Key words: grinding, nanofluid, titanium alloy, forced air cooling, temperature field

摘要： 为克服普通纳米流体微量润滑在磨削区换热能力不足的技术瓶颈，提出了低温风冷+纳米流体微量润滑的新工艺，并建立了温度场有限差分模型。对低温风冷+纳米流体微量润滑、低温风冷、纳米流体微量润滑三种冷却方式下的磨削温度场进行了数值仿真，结果表明低温风冷+纳米流体微量润滑的换热能力最强，低温风冷次之，纳米流体微量润滑最弱。在三种不同冷却方式下对钛合金Ti-6Al-4V平面磨削温度场进行了实验，工件表面最高温度相对误差小于5%，验证了理论模型的正确性。

关键词: 磨削, 纳米流体, 钛合金, 风冷, 温度场

CLC Number:

TG580

WANG Xiaoming1;ZHANG Jianchao1;WANG Xuping2;ZHANG Yanbin2;LUO Liang3;ZHAO Wei4;LIU Bo5;NIE Xiaolin6;LI Changhe1. Temperature Field Model and Verification of Titanium Alloy Grinding under Different Cooling Conditions[J]. China Mechanical Engineering, DOI: 10.3969/j.issn.1004-132X.2021.05.009.

王晓铭1;张建超1;王绪平2;张彦彬2;罗亮3;赵伟4;刘波5;聂晓霖6;李长河1. 不同冷却工况下的磨削钛合金温度场模型及验证[J]. 中国机械工程, DOI: 10.3969/j.issn.1004-132X.2021.05.009.

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