刀具几何角度对7050铝合金高速切削影响研究
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摘要
使用不同前角度的YG刀具对7050铝合金进行切削试验。试验结果表明:随着刀具前角的不断增大,三向切削力呈现较大幅度的减小趋势,切削表面质量也相应提高,但当前角增大到15°时,切削表面质量变差。究其原因在于,随着刀具前角的不断增大,刀尖锋刃程度增强,致使切削力减小,但是前角超过15°后,容易产生积屑瘤,致使切削表面质量变差。
In this paper cutting tests is implemented with different rake angle YG cutting tool for 7050 aluminum alloy. The results show that the value of cutting force reduces and surface quality improves with the increasing of rake angle of cutting tool. When the rake angle increases to 15° the cutting surface quality go to bad,the reason is that the edge of cutting tool becomes sharp,the cutting force is reduced. When the rake angle is more than 15°,built-up edge is formed easily.
In this paper cutting tests is implemented with different rake angle YG cutting tool for 7050 aluminum alloy. The results show that the value of cutting force reduces and surface quality improves with the increasing of rake angle of cutting tool. When the rake angle increases to 15° the cutting surface quality go to bad,the reason is that the edge of cutting tool becomes sharp,the cutting force is reduced. When the rake angle is more than 15°,built-up edge is formed easily.
引文
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[2]谭靓,姚倡锋,张定华.7055铝合金高速加工表面完整性对疲劳寿命的影响[J].机械科学与技术,2015,(6):872-876.
[3]成群林,柯映林,董辉跃.航空铝合金铣削加工中切削力的数值模拟研究[J].航空学报,2006,(4):724-727.
[4]周军.铝合金7050-T7451微切削加工机理及表面完整性研究[D].济南:山东大学,2010.
[5]付秀丽,艾兴,刘战强,万熠.高速切削加工航空铝合金7050-T7451剪切角模型研究[J].中国机械工程,2007,(2):220-224.
[6]Paturi,Shastri;Boegman,Leon;Bouffard,Damien;Rao,Yerubandi R.Three-dimensional simulation of Lake ontario north-shore hydrodynamics and contaminant transport[J].Journal of Hydraulic Engineering,2015,141(3):23-26.
[7]M.Ketabchi;H.Mohammadi;M.Izadi.Finite-element simulation and experimental investigation of isothermal backward extrusion of7075 al alloy[J].Arabian Journal for Science and Engineering,2012,37(1):34-37.
[8]King P.1,Vaughn R.L.A synaptic view of high-speed machining from salmon to the present.[J].High Speed Machining.ASME.1984,(2):l-13.
[9]Uma Maheshwera Reddy Paturi,Suresh Kumar Reddy Narala,Rajdeep Singh Pundir.Constitutive flow stress formulation,model validation and FE cutting simulation for AA7075-T6 aluminum alloy[J].Materials Science and Engineering:A,2014,605(4):176-185.
[10]王叙臣,王益轩,于永积,等.基于虚拟样机的数控铣床结构动态特性分析[J].西安工程大学学报,2011,2(8):163-167.
[11]赵显嵩.TC4钛合金高速切削的表面粗糙度与切削力实验研究[D].大连:大连理工大学,辽宁大连,2013.
[12]刘胤,焦刚,刘军,姜伟.AZ91D镁合金的切削加工性能[J].机械工程材料,2013,36(7):25-27.
[13]王艳光,彭晓东,赵辉,谢卫东,魏群义.大型薄壁精密镁合金铸件铸造技术进展[J].兵器材料科学与工程,2011,(5):101-104.