Experimental Study of High-speed Turning of Hardened Bearing Steels under High-pressure Cryogenic CO2 Jet Cooling Conditions

被引：0
|
作者：
Li X. [1 ]
Zhao W. [1 ]
Li H. [1 ]
Shi W. [1 ]
He N. [1 ]
机构：
[1] College of Mechanical and Electrical Engineering, Nanjing University Aeronautics and Astronautics, Nanjing
来源：
Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2023年 / 34卷 / 24期
关键词：
cryogenic machining; hardened bearing steel; machined surface quality; polycrystalline cubic boron nitride(PCBN) tool; tool wear;
D O I：
10.3969/j.issn.1004-132X.2023.24.009
中图分类号：
学科分类号：
摘要：
In the high-speed hard turning processes for hardened bearing steels, there were some problems such as rapid tool wear, serious chip entanglement and poor machined surface quality. The high-speed hard turning tests of GCrl5 bearing ring were carried out with PCBN tools using high-pressure cryogenic CO2 jet as cooling medium, and compared with high-pressure emulsion and highspeed dry cutting, and the effects of cooling conditions and cutting parameters on cutting performances and machined surface quality were analyzed. The results show that within a certain range of the cutting parameters, the use of high-pressure cryogenic CO2 jet assisted cutting may effectively reduce tool wears and improve chip breakings, but it is also more likely to chipping when the tools are in the stage of severe wear. When the cutting speed is high, the high pressure cryogenic CO2 jet may improve the surface quality of the workpicccs more significantly, effectively reduce the surface roughness of the workpicccs, increase the residual compressive stresses and surface microhardnesses. © 2023 China Mechanical Engineering Magazine Office. All rights reserved.
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页码：2975 / 2985
页数：10
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