摘要
针对7075航空铝合金干切削过程中加工表面质量调控难题,通过搭建切削试验平台,重点研究干车削过程中切削用量对7075_T651航空铝合金切削表面质量和显微硬度的作用,并建立切削表面粗糙度与加工表面显微硬度间的关系模型,合理解释了7075_T651铝合金干车削过程中切削用量-加工表面硬度-表面粗糙度间的关联作用。研究结果表明,对加工表面显微硬度影响最大的是切深,其次是进给速度,影响最小的是切削速度;对表面粗糙度影响最大的是进给速度,其次是切深,影响最弱是切削速度;当7075_T651铝合金在合适切削用量(中等切削速度,中低进给量,中高切深)下进行干车削加工时,可产生硬度大且粗糙度低的加工表面,能够具有更强的抗塑性变形能力。
Aiming at the problem of adjusting and controlling the cutting quality of machined surface in the dry cutting process of aviation aluminum alloy 7075.Through the establishment of reasonable cutting test platform,the effects of cutting parameters on the machined surface quality and microhardness of aviation aluminum alloy 7075_T651 during its dry turning.The relationship model between machined surface roughness and microhardness was established.And the correlation interaction between cutting parameters,machined surface hardness and surface roughness in the dry turning process of aluminum alloy 7075_T651 was reasonably explained.The results showed that the cutting depth has the greatest influence on the microhardness of the machined surface,followed by the feed speed,and the cutting speed has the least influence.The biggest influence on surface roughness is produced by feed rate,followed by cutting depth,and the weakest influence is produced by cutting speed.The machined surface with high hardness and low roughness can be produced,and it can have stronger plastic deformation resistance,when aluminum alloy 7075_T651 is machined under the appropriate cutting conditions(medium cutting speed,medium-low feed rate and mediumhigh cutting depth).
作者
蒋宏婉
任仲伟
袁森
周小容
岳熙
JIANG Hong-wan;REN Zhong-wei;YUAN Sen;ZHOU Xiao-rong;YUE Xi(School of Mechanical Engineering,Guizhou Institute of Technology,Guiyang 550003,China;School of Mechanical Engineering,Guizhou University,Guiyang 550025,China)
出处
《组合机床与自动化加工技术》
北大核心
2022年第8期137-139,143,共4页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然科学基金项目(52005118)
贵州省科技计划项目(黔科合基础-ZK[2022]重点026)
贵州理工学院高层次人才科研启动基金项目(2018073)。
关键词
航空铝合金
7075
表面质量
显微硬度
关联作用
aviation aluminum alloy
7075
surface quality
microhardness
correlation interaction
