TC4钛合金在低温CO2冷却下的切削性能

中国机械工程

TC4钛合金在低温CO2冷却下的切削性能

肖虎;李亮

南京航空航天大学机电学院，南京，210016

出版日期:2017-04-25 发布日期:2017-04-25
基金资助:
国家自然科学基金资助项目（51475234）

High Speed Cutting of TC4 Titanium Alloy under Cryogenic CO2 Cooling Conditions

XIAO Hu;LI Liang

College of Mechanical and Electrical Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing，210016

Online:2017-04-25 Published:2017-04-25

摘要/Abstract

摘要： TC4钛合金在高速车削时易出现刀具磨损快和缠屑等问题，难以保证表面加工质量。利用自行组建的强压液态CO2供给系统，将低温CO2混合物高速射流作为冷却润滑介质，研究了低温CO2射流下高速切削TC4钛合金时的切削温度、切削力、刀具磨损、表面粗糙度以及切屑的断屑情况，并将其与干切削状况进行了对比分析。结果表明，低温CO2射流可有效降低切削温度,减小切削力，减轻切屑缠绕，抑制刀具磨损并提高已加工表面质量。

关键词: 高速切削, TC4钛合金, 低温CO2, 强化冷却

Abstract: Rapid tool wear and poor chip breaking performance appeared on high speed cutting of TC4 alloy, while quality of the machined surfaces might not be guaranteed. By high-pressure liquid CO2 supply system, TC4 titanium alloy was tested with high speed cutting processes under condition of CO2 snow coolant. Cutting temperaturs, cutting force, tool wear, surface roughness and chip breakings of TC4 cutting were analyzed on high speed TC4 under enhanced cooling of cryogenic CO2. Difference between suppress CO2 snow cooling condition and dry cutting condition were compared with multi-parameters. Experimental results show that cutting temperatures, cutting forces, chip breakings, tool wears and quality of the machined surfaces are improved by the suppress CO2 snow coolant.

Key words: high speed cutting, TC4 titanium alloy, cryogenic CO2, enhanced cooling

中图分类号:

O327
TH113

肖虎, 李亮. TC4钛合金在低温CO2冷却下的切削性能[J]. 中国机械工程.

XIAO Hu, LI Liang. High Speed Cutting of TC4 Titanium Alloy under Cryogenic CO2 Cooling Conditions[J]. China Mechanical Engineering.

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