低温切削7075铝合金鳞刺形成规律及抑制措施

doi:10.3969/j.issn.1004-132X.2022.03.002

摘要/Abstract

摘要： 针对干切削铝合金工件表面易产生鳞刺、表面完整性较差的问题，采用液氮冷却方式在不同切削参数下对7075铝合金进行了正交切削试验，使用扫描电子显微镜和3D光学轮廓仪分别表征了已加工表面形貌、鳞刺分布和鳞刺尺寸，分析了切削速度、进给量、刀具前角和冷却方式（干切削、液氮冷却、切削液）对已加工表面鳞刺分布和尺寸的影响，并基于鳞刺形成理论讨论了切削参数和液氮冷却对鳞刺形成过程的影响。金属层积是鳞刺形成的充分必要条件，通过改善刀屑接触摩擦特性能够抑制鳞刺的形成。试验结果表明，较高切削速度、小进给量和大刀具前角能减小金属层积厚度，抑制鳞刺的形成。低温切削下已加工表面鳞刺分布密度和尺寸均小于常温切削，可得到较为光整的已加工表面。

关键词: 低温切削, 鳞刺, 7075铝合金, 表面质量

Abstract: Aiming at the problems of dry cutting aluminum alloys that were prone to scale thorns and poor surface integrity under low and medium cutting speeds, the orthogonal cutting experiments of aluminum alloy 7075 were carried out at different machining parameters using liquid nitrogen. The surface topography of workpieces and distribution of scale thorns were analyzed through scanning electron microscope, and the dimensions of scale thorns were measured by 3D surface profiler accurately. The effects of cutting speeds, feed rates, rake angles and cooling strategies (dry cutting, liquid nitrogen cooling, cutting fluid) on the distributions and sizes of scale thorns were analyzed. Based on the formation theory of scale thorns, the effects of machining parameters and liquid nitrogen cooling on the formation processes of scale thorns were discussed. Accumulated metals were a necessary and sufficient condition of the formation of scale thorns, and might be inhibited by improving tribological properties between chip and rake face. The results show that high cutting speed, low feed rate and large tool rake angle may reduce the thickness of accumulated metals, and inhibit the formation of scale thorns. Under cryogenic cutting conditions, the distribution density and size of the scale thorns are less than that of dry cutting, and a finishing surface topography of workpieces may be obtained.

Key words: cryogenic cutting, scale thorn, aluminum alloy 7075, surface quality

中图分类号:

TG506.3

刘枭, 邓文君, 陈海涛, 张保玉. 低温切削7075铝合金鳞刺形成规律及抑制措施[J]. 中国机械工程, 2022, 33(03): 261-269.

LIU Xiao, DENG Wenjun, CHEN Haitao, ZHANG Baoyu. Scale Thorn Formation Regularity and Inhibitory Measures in Cryogenic Cutting Processes of Aluminum Alloy 7075[J]. China Mechanical Engineering, 2022, 33(03): 261-269.

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链接本文: http://www.cmemo.org.cn/CN/10.3969/j.issn.1004-132X.2022.03.002

http://www.cmemo.org.cn/CN/Y2022/V33/I03/261

参考文献

［1］LI Jinfeng, PENG Zhuowei, LI Chaoxing, et al. Mechanical Properties, Corrosion Behaviors and Microstructures of 7075 Aluminium Alloy with Various Aging Treatments［J］. Transactions of Nonferrous Metals Society of China, 2008,18(4):755-762.
［2］DAS P, JAYAGANTHAN R, SINGH I V. Tensile and Impact-toughness Behaviour of Cryorolled Al 7075 Alloy［J］. Material and Design, 2011,32(3):1298-1305.
［3］LIAO Z R, MONACA A L, MURRAY J, et al. Surface Integrity in Metal Machining—Part I:Fundamentals of Surface Characteristics and Formation Mechanisms［J］. International Journal of Machine Tools and Manufacture, 2021,162:103687.
［4］DEBNATH S, REDDY M M, YI Q S. Environmental Friendly Cutting Fluids and Cooling Techniques in Machining:a Review［J］. Journal of Cleaner Production, 2014,83:33-47.
［5］KIM D Y, KIM D M, PARK H W. Numerical and Experimental Study of End-milling Process of Titanium Alloy with a Cryogenic Internal Coolant Supply［J］. International Journal of Advanced Manufacturing Technology, 2019,105(7/8):2957-2975.
［6］STAMPFER B, GOLDA P, SCHIEBL R, et al. Cryogenic Orthogonal Turning of Ti-6Al-4V Analysis of Nitrogen Supply Pressure Variation and Subcooler Usage［J］. The International Journal of Advanced Manufacturing Technology, 2020,111(1/2):359-369.
［7］GUPTA M K, SONG Q H, LIU Z Q, et al. Experimental Characterisation of The Performance of Hybrid Cryo-lubrication Assisted Turning of Ti-6Al-4V Alloy［J］.Tribology International, 2021,153:106582.
［8］AMIGO F J, URBIKAIN G, PEREIRA O, et al. Combination of High Feed Turning with Cryogenic Cooling on Haynes 263 and Inconel 718 Superalloys［J］. Journal of Manufacturing Processes, 2020,58:208-222.
［9］KHANNA N, AGRAWAL C, GUPTA M K, et al. Tool Wear and Hole Quality Evaluation in Cryogenic Drilling of Inconel 718 Superalloy［J］.Tribology International,2020, 143:106084.
［10］BORDIN A, BRUSCHI S, GHIOTTI A,et al. Analysis of Tool Wear in Cryogenic Machining of Additive Manufactured Ti6Al4V Alloy［J］.Wear, 2015, 328:89-99.
［11］SARTORI S, PEZZATO L, DABALA M, et al. Surface Integrity Analysis of Ti6Al4V after Semi-finishing Turning under Different Low-temperature Cooling Strategies［J］.Journal of Materials Engineering and Performance, 2018, 27(9):4810-4818.
［12］BERTOLINI R, LIZZUL L, PEZZATO L, et al. Improving Surface Integrity and Corrosion Resistance of Additive Manufactured Ti6Al4V Alloy by Cryogenic Machining［J］.The International Journal of Advanced Manufacturing Technology,2019,104(5/8):2839-2850.
［13］BAGHERZADEH A, BUDAK E. Investigation of Machinability in Turning of Difficult-to-cut Materials Using a New Cryogenic Cooling Approach［J］. Tribology International, 2018,119:510-520.
［14］GRABNER F, OSTERREICHER J A, GRUBER B, et al. Cryogenic Forming of Al-Mg Alloy Sheet for Car Outer Body Applications［J］. Advanced Engineering Materials, 2019,21(8):1900089.
［15］SHOKRANI A, DHOKIA V, NEWMAN S T. Investigation of the Effects of Cryogenic Machining on Surface Integrity in CNC End Milling of Ti-6Al-4V Titanium Alloy［J］.Journal of Manufacturing Processes, 2016, 21:172-179.
［16］ROTELLA G. Effect of Surface Integrity Induced by Machining on High Cycle Fatigue Life of 7075-T6 Aluminum Alloy［J］. Journal of Manufacturing Processes, 2019, 41:83-91.
［17］YIN Xiaolong, DENG Wenjun, ZOU Yinhui, et al. Ultrafine Grained Al 7075 Alloy Fabricated by Cryogenic Temperature Large Strain Extrusion Machining Combined with Aging Treatment［J］. Materials Science and Engineering A, 2019, 762:138106.
［18］SHOJAEI K, SAJADIFAR S V, YAPICI G G. On the Mechanical Behavior of Cold Deformed Aluminum 7075 Alloy at Elevated Temperatures［J］.Materials Science and Engineering:A, 2016, 670:81-89.
［19］黄逸爽. 积屑瘤的稳定性及鳞刺问题初探［J］.南昌航空工业学院学报, 1988(1):1-8.
HUANG Yishuang. A Discussion on Stability of Built-up Edges (BUE) and on Fish-scales Formed on Cut Surface［J］. Journal of Nanchang Institute of Aeronautical Technology, 1988(1):1-8.
［20］周泽华. 犁沟、鳞刺、积屑瘤及他们之间的关系［J］.华南理工大学学报（自然科学版）, 1989,2(17):1-12.
ZHOU Zehua. Plowing-groove, Scale, Built-up Edge and Their Relationship［J］. Journal of South China University of Technology（Natural Sciences）, 1989, 2(17) :1-12.
［21］张东初,裴旭明.加工工艺对表面粗糙度及疲劳寿命的影响［J］.中国机械工程, 2003,14 (16) :1374-1377.
ZHANG Dongchu, PEI Xuming. Effects of Machining Processes on Surface Roughness and Fatigue Life［J］. China Mechanical Engineering, 2003, 14(16) :1374-1377.
［22］何耿煌,鄢国洪,李凌祥,等.典型钛合金TC17车削过程鳞刺生成规律及其抑制措施［J］.中国机械工程, 2020, 31(13):1585-1592.
HE Genghuang, YAN Guohong, LI Lingxiang, et al. Scale Thorn Generation Regularity and Its Inhibitory Measures in Turning Processes of Typical Titanium Alloy TC17［J］.China Mechanical Engineering, 2020, 31(13):1585-1592.
［23］李俊涛.浅析金属切削加工中鳞刺的形成原因及抑制措施［J］.机械研究与应用,2015,28(2):152-153.
LI Juntao. Analysis on Causes and Suppression Measures to Burr in Metal Cutting Process［J］. Mechanical Research and Application,2015,28(2):152-153.
［24］周泽华. 金属切削原理［M］.上海：上海科技出版社，1984：126-127.
ZHOU Zehua. Theory of Metal Cutting［M］. Shanghai:Shanghai Scientific and Technical Publishers，1984：126-127.
［25］PANG Xueqin, ZENG Yuning, ZHANG Jiayang, et al. Analytical Model and Experimental Verification of Poisson Burr Formation in Ductile Metal Machining［J］. Journal of Materials Processing Technology, 2021, 290:116966.
［26］KUMAR P, KUMAR M, BAJPAI V, et al. Recent Advances in Characterization, Modeling and Control of Bur Formation in Micro-milling［J］. Manufacturing Letters, 2017, 13:1-5.
［27］PANG Xueqin, LIU Xiao, ZHANG Jiayang, et al. Investigation on the Modelling and Characterization of Top Edge Burr Formation in Slotting Finned Tube［J］. International Journal of Advanced Manufacturing Technology, 2021, 112(1/2):537-551.

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