基于回转基准面的椭圆振动辅助切削微织构过程仿真研究
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摘要
仿生研究表明,具有凹坑、沟槽等微结构的表面具有减阻、自清洁等优异性能,微结构表面在航空航天、船舶、光学等领域有广泛的应用,对于节省能源、减阻降噪、降低污染和提升产品性能等具有重要的意义。为了有效预测椭圆振动辅助切削加工微织构的效果,依据椭圆振动装置的共振频率和回转类基准面的转动速率,给出了一种椭圆振动辅助切削微织构的轨迹规划方法,通过对周期振动载荷进行傅里叶级数的转化,在刀具有限元模型上加载了椭圆振动载荷,建立了基于回转面的椭圆振动辅助切削微织构的有限元仿真模型。基于建立的有限元仿真模型,对不同振动参数下的椭圆振动辅助切削微织构加工过程中的瞬时Mises应力分布和切削力进行分析,验证了微织构加工轨迹的正确性,为进一步的微织构加工提供了参考。
Bionic studies have shown that micro-structures such as pits and trenches have excellent performances such as drag reduction and self-cleaning. The processing of micro-texture is of great significance for saving energy,reducing pollution and improving product life. In order to effectively predict the effect of elliptical vibration-assisted cutting micro-texture, this paper proposes a trajectory planning of elliptical vibration cutting micro-texture based on the characteristics of the resonant frequency of the elliptical vibration-assisted cutting mechanism and the rotation rate of the rotary reference surface. The loads of elliptical vibration are exerted on finite element tool model by transforming periodic vibration loads into the Fourier series. Thus, the finite element model of elliptical vibration-assisted cutting micro-texture is established. Based on the established finite element simulation model, the instantaneous Mises stress distribution and cutting force is analyzed by selecting different vibration parameters in micro-texture generation. The results of the finite element simulation verifies the correctness of elliptical vibration-assisted cutting micro-texture, and provides a reference for actual elliptical vibration-assisted cutting micro-texture.
Bionic studies have shown that micro-structures such as pits and trenches have excellent performances such as drag reduction and self-cleaning. The processing of micro-texture is of great significance for saving energy,reducing pollution and improving product life. In order to effectively predict the effect of elliptical vibration-assisted cutting micro-texture, this paper proposes a trajectory planning of elliptical vibration cutting micro-texture based on the characteristics of the resonant frequency of the elliptical vibration-assisted cutting mechanism and the rotation rate of the rotary reference surface. The loads of elliptical vibration are exerted on finite element tool model by transforming periodic vibration loads into the Fourier series. Thus, the finite element model of elliptical vibration-assisted cutting micro-texture is established. Based on the established finite element simulation model, the instantaneous Mises stress distribution and cutting force is analyzed by selecting different vibration parameters in micro-texture generation. The results of the finite element simulation verifies the correctness of elliptical vibration-assisted cutting micro-texture, and provides a reference for actual elliptical vibration-assisted cutting micro-texture.
引文
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[2]杨弘炜,高歌.一种新型边界层控制技术应用于湍流减阻的实验研究[J].航空学报,1997,18(4):455-457.YANG Hongwei,GAO Ge.Experimental study for turbulent drag reduction using a novel boundary control technique[J].Acta Aeronautica et Astronautics Sinica,1997,18(4):455-457.
[3]JIANG Y,SHEN H,PU T,et al.High efficiency multi-crystalline silicon solar cell with inverted pyramid nanostructure[J].Solar Energy,2017,142:91-96.
[4]BECHERTD W,BRUSE M,HAGE W,et al.Fluid mechanics of biological surfaces and their technological application[J].Naturwissenschaften,2000,87(4):157-171.
[5]WANG X,KATO K,ADACHI K,et al.The effect of laser texturing of Si Csurface on the critical load for the transition of water lubrication mode from hydrodynamic to mixed[J].Tribology International,2001,34(10):703-711.
[6]SáNCHEZAMAYAJ M,BOUKHA Z,GONZáLEZROVIRA L,et al.Laser texturization to improve absorption and weld penetration of aluminum alloys[J].Journal of Laser Applications,2012,24(1):680-685.
[7]KURNIAWAN R,KISWANTO G,KO T J.Surface roughness of two-frequency elliptical vibration texturing(TFEVT)method for micro-dimple pattern process[J].International Journal of Machine Tools&Manufacture,2017,116:77-95.
[8]HE Y,ZOU P,ZHUW L,et al.Ultrasonic elliptical vibration cutting of hard materials:simulation and experimental study[J].International Journal of Advanced Manufacturing Technology,2017,91(1-4):363-374.
[9]王明海,王江涛,郑耀辉,等.GH4169三维车削力与温度有限元仿真[J].现代制造工程,2016(8):106-111.WANG Minghai,WANG Jiangtao,ZHENG Yaohui,et al.The finite element simulation of GH4169 three-dimension turning cutting force and temperature[J].Modern Manufacturing Engineering,2016(8):106-111.
[10]赵永亭.超声椭圆振动切削工作头的研究[D].沈阳:东北大学,2014.ZHAO Yongting.Research on ultrasonic ellipse vibration cutting working head[D].Shenyang:Northeastern University,2014.