Experimental Study of Surface Morphology of Polycarbonate Ultra-low Temperature Cooling Turning

doi:10.3969/j.issn.1004-132X.2024.02.002

Abstract

Abstract: Aiming at the problems of poor heat resistance, deformation, and swelling, a turning test of polycarbonate was carried out under dry cutting, water cooling, ultra-low temperature cooling, and the shape of the surface was analyzed. The morphological differences of machined surfaces were explained from the perspective of relaxation time of molecular chains, crazing generation, and brittle-toughness transition. It is found that, on polycarbonate surfaces, dry cutting produces a large number of strong crazing, water-cooled cutting produced a large number of fine crazing, while the ultra-low temperature cooling cutting produces less crazing. Therefore, ultra-low temperature cooling has a positive effect on improving the processing quality of polycarbonates.

Key words: polycarbonate, ultra-low temperature cooling cutting, crazing, machining surface morphology

摘要： 针对聚碳酸酯加工时存在的耐热性差、变形、溶胀等问题，分别在干切削、水冷和超低温冷却条件下进行了聚碳酸酯的车削试验，并分析了材料加工表面的形貌，从分子链弛豫时间、银纹产生和脆韧性转变的角度解释了加工表面形貌的差异。研究发现，聚碳酸酯干切削表面产生大量粗大银纹，水冷切削表面产生大量细密银纹，超低温冷却切削表面银纹较少，因此超低温冷却对提高聚碳酸酯的加工质量具有积极作用。

关键词: 聚碳酸酯, 超低温冷却切削, 银纹, 加工表面形貌

CLC Number:

TH161

BAO Rui, LIU Kuo, ZHANG Jie, HAN Lingsheng, LI Jianming, ZUO Yueshuai, LIU Haibo, WANG Yongqing. Experimental Study of Surface Morphology of Polycarbonate Ultra-low Temperature Cooling Turning[J]. China Mechanical Engineering, 2024, 35(02): 201-207.

包锐, 刘阔, 张杰, 韩灵生, 李建明, 左月帅, 刘海波, 王永青. 聚碳酸酯超低温冷却车削表面形貌试验研究[J]. 中国机械工程, 2024, 35(02): 201-207.

References

［1］MAO X, YUK H, ZHAO X. Hydration and Swelling of Dry Polymers for Wet Adhesion［J］. Journal of the Mechanics and Physics of Solids, 2020, 137:103863.
［2］杨亮,孙明杰.聚碳酸酯振动切削温度仿真与试验研究［J］.工具技术,2021,55(11):49-52.
YANG Liang, SUN Mingjie. Simulation and Experimental Study on Vibration Cutting Temperature of Polycarbonate［J］. Tool Technology,2021,55(11):49-52.
［3］刘逢博,董如永.聚碳酸酯(PC)材料的精密加工工艺的研究和应用［J］.机电产品开发与创新,2009,22(6):188-190.
LIU Fengbo, DONG Ruyong. Research and Application of Precision Machining Technology of Polycarbonate (PC) Material［J］. Mechatronics Development and Innovation, 2009,22(6):188-190.
［4］袁凯. 超低温加工用液氮传输调控系统研制［D］.大连：大连理工大学,2017.
YUAN Kai. Development of Liquid Nitrogen Transfer Control System for Ultra-low Temperature Processing［D］. Dalian:Dalian University of Technology,2017.
［5］SHOKRANI A, DHOKIA V, MUOZ-ESCALONA P, et al. State-of-the-art Cryogenic Machining and Processing［J］. International Journal of Computer Integrated Manufacturing, 2013, 26(7):616-648.
［6］BALAJI V, RAVI S, CHANDRAN P N, et al. Review of the Cryogenic Machining in Turning and Milling Process［J］. Int. J. Res. Eng. Technol., 2015, 4(10):38-42.
［7］JAWAHIR I S, ATTIA H, BIERMANND, et al. Cryogenic Manufacturing Processes［J］. CIRP annals, 2016, 65(2):713-736.
［8］KHORAN M, AMIRABADI H, AZARHOUSHANG B. The Effects of Cryogenic Cooling on the Grinding Process of Polyether Ether Ketone (PEEK)［J］. Journal of Manufacturing Processes, 2020, 56:1075-1087.
［9］WANG Y, HAN L, LIU K, et al. Optimization of Jet Parameters for Minimizing Surface Roughness in Cryogenic Milling of Ti-6Al-4V［J］. Journal of Manufacturing Science and Engineering, 2021, 143(5):713-736.
［10］侯博,谢浔,崔超,等.石英纤维增强聚酰亚胺复合材料超低温铣削试验［J］.宇航材料工艺,2020,50(3):56-61.
HOU Bo, XIE Xun, CUI Chao, et al. Milling Experiment of Quartz Fiber Reinforced Polyimide Composites at Ultra-low Temperature［J］. Aerospace Materials Technology, 2020, 50(3):56-61.
［11］王永青,郭东明,郭立杰,等.超低温加工技术的研究现状及发展趋势［J］.上海航天,2020,37(3):11-21.
WANG Yongqing, GUO Dongming, GUO Lijie, et al. Research Status and Development Trend of Ultra-low Temperature Machining Technology［J］. Shanghai Aerospace, 2019,37(3):11-21.
［12］SHIH A J, LEWIS M A, STRENKOWSKI J S. End Milling of Elastomers—Fixture Design and Tool Effectiveness for Material Removal［J］. J. Manuf. Sci. Eng., 2004, 126(1):115-123.
［13］KAKINUMA Y, KIDANI S, AOYAMA T. Ultra-precision Cryogenic Machining of Viscoelastic Polymers［J］. CIRP Annals, 2012, 61(1):79-82.
［14］SONG K, GANG M G, JUN M B G, et al. Cryogenic Machining of PDMS Fluidic Channel Using Shrinkage Compensation and Surface Roughness Control［J］. International Journal of Precision Engineering and Manufacturing, 2017, 18:1711-1717.
［15］DHOKIA V G, NEWMAN S T, CRABTREE P, et al. A Methodology for the Determination of Foamed Polymer Contraction Rates as a Result of Cryogenic CNC Machining［J］. Robotics and Computer-Integrated Manufacturing, 2010, 26(6):665-670.
［16］YILDIZ Y, NALBANT M. A Review of Cryogenic Cooling in Machining Processes［J］. International Journal of Machine Tools and Manufacture, 2008, 48(9):947-964.
［17］华幼卿, 金日光. 高分子物理［M］. 4版.北京:化学工业出版社, 2013.
HUA Youqing, JIN Liangliang. Polymer Physics［M］. 4th ed. Beijing:Chemical Industry Press, 2013.
［18］励杭泉, 张晨. 聚合物物理学［M］. 北京:化学工业出版社, 2007.
LI Hangquan, ZHANG Chen. Polymer Physics［M］. Beijing:Chemical Industry Press, 2007.
［19］ARGON A S, HANNOOSH J G. Initiation of Crazes in Polystyrene［J］. Philosophical Magazine, 1977, 36(5):1195-1216.
［20］WANG Y, WANG S, LIU K, et al. Effect of Indirect Cryogenic Cooling on the Machining Accuracy and Tool Vibration in the Turning of Polysulfone［J］. Journal of Manufacturing Science and Engineering:Transactions of the ASME, 2022(6):144.
［21］WANG Y, LI J, LIU K, et al. Experiment and Numerical Study of Chip Formation Mechanism during Cryogenic Machining of Ti-6Al-4V Alloy［J］. Journal of Manufacturing Processes, 2022, 84:1246-1257.
［22］何平笙. 高聚物的力学性能［M］. 2版. 合肥:中国科学技术大学出版社, 2008.
HE Pingsheng. Mechanical Properties of Polymers［M］. 2nd ed. Hefei:University of Science and Technology of China Press, 2008.

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