整体式硬质合金微铣刀的几何结构优化与在位放电制备
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摘要
基于ANSYS有限元分析软件,对微铣刀进行模态分析和应力变形分析,讨论微铣刀的刀头形状、悬伸量、刀杆直径、刀颈半锥角、刀头长径比等几何结构参数对其动力学性能的影响规律,对比D形、三角形、"一"字形等简单刀头截面形状结构及传统螺旋结构微铣刀的强度和刚度,进而获得微铣刀的几何结构优化参数。采用线电极电火花磨削的方式,在位放电制备出刀头直径约100μm、刃口锋利的D形微铣刀。
To investigate the influence of geometric structure of tool tip,tool overhang,shank diameter,half conical angle and ratio of tool tip length to tool tip diameter on dynamic properties of micro milling cutter,and compare the intensity and stiffness of D shape,triangular shape,quadrilateral shape and traditional double-edged spiral shape,the micro milling tool model has been established.The mode,intensity and stiffness of micro milling tools with different structural parameters has been compared by finite element simulation with ANSYS software,meanwhile,the geometric structural parameters which are suitable for micro milling processing is acquired. Finally,a D shape micro-milling tool with sharp cutting edge and diameter of 100 μm is fabricated by wire electro-discharge grinding.
To investigate the influence of geometric structure of tool tip,tool overhang,shank diameter,half conical angle and ratio of tool tip length to tool tip diameter on dynamic properties of micro milling cutter,and compare the intensity and stiffness of D shape,triangular shape,quadrilateral shape and traditional double-edged spiral shape,the micro milling tool model has been established.The mode,intensity and stiffness of micro milling tools with different structural parameters has been compared by finite element simulation with ANSYS software,meanwhile,the geometric structural parameters which are suitable for micro milling processing is acquired. Finally,a D shape micro-milling tool with sharp cutting edge and diameter of 100 μm is fabricated by wire electro-discharge grinding.
引文
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[13]张少婧,徐宗伟,房丰洲,等.基于聚焦离子束铣削技术的微刀具制备[J].天津大学学报,2010,43(5):469-472.
[14]FILZ S,OZDOGANLAR O B,ROMERO L A.An analytical model for micro-end mill dynamics[J].Journal of Vibration and Control,2008,14(8):1125-1150.
[15]方泽平.微细立铣刀的设计基础理论与刃磨技术研究[D].北京:北京理工大学,2014.
[2]CHAE J,PARK S S,FREIHEIT T.Investigation of micro-cutting operations[J].International Journal of Machine Tools and Manufacture,2006,46(3-4):313-332.
[3]陈明君,陈妮,何宁,等.微铣削加工机理研究新进展[J].机械工程学报,2014,50(5):161-172.
[4]李迎.微铣削加工技术研究现状及发展趋势[J].电子机械工程,2008,24(6):26-32.
[5]JOSHI S S,MELKOTE S N.An explanation for the size effect in machining using strain gradient plasticity[J].ASME Journal of Manufacturing Science and Engineering,2004,126(4):679-684.
[6]RAHMAN M,KUMAR A S,PRAKASH J R S.Micro milling of pure copper[J].Journal of Materials Processing Technology,2001,116(1):39-43.
[7]李伟.高速精密气动微主轴的关键技术研究[D].长沙:湖南大学,2014.
[8]FANG F Z,WU H,LIU X D.Tool geometry study in micromachining[J].Journal of Micromechanics and Microengineering,2003,13(5):726-731.
[9]FLEISCHER J,DEUCHERT M,RUHS C,et al.Design and manufacturing of micromilling tools[J].Microsystem Technologies,2008,14(9):1771-1775.
[10]EGASHIRA K,MIZUTANI K.Micro-drilling of monocrystalline silicon using a cutting tool[J].Precision Engineering,2002,26(3):263-268.
[11]PICARD Y N,ADAMS D P,VASILE M J,et al.Focused ion beam-shaped microtools for ultra-precision machining of cylindrical components[J].Precision Engineering,2003,27(1):59-69.
[12]曹自洋.微细铣削机床、刀具与加工机理的基础研究[D].南京:南京航空航天大学,2008.
[13]张少婧,徐宗伟,房丰洲,等.基于聚焦离子束铣削技术的微刀具制备[J].天津大学学报,2010,43(5):469-472.
[14]FILZ S,OZDOGANLAR O B,ROMERO L A.An analytical model for micro-end mill dynamics[J].Journal of Vibration and Control,2008,14(8):1125-1150.
[15]方泽平.微细立铣刀的设计基础理论与刃磨技术研究[D].北京:北京理工大学,2014.