高速铣削镍基高温合金振动的实验研究
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摘要
针对陶瓷刀具高速铣削镍基高温合金GH4169时的振动问题,采用单因素实验,以加速度传感器频谱响应值为动态分析指标,根据陶瓷刀具磨损程度和加工表面粗糙度值,分析加工过程中的刀具铣削深度、机床进给速度等工艺参数对系统振动的影响,建立主轴转速、每齿进给量和铣削深度为变量的振幅数学模型。结果表明:在铣削宽度为0.7 mm、铣削深度31.5 mm、铣削速度800 m/min、每齿进给量0.08 mm时,加工过程中振动的最大幅值出现在10 k Hz附近,工件受振动的影响最为剧烈。该研究为利用陶瓷刀具高速铣削同类材料时,加工工艺参数的选取提供了实验支持与理论参考。
This paper is concerned with the response to the vibration occurring in ceramic tools used for high speed milling of nickel based superalloy GH4169. The research building on the single factor experiment involves analyzing the processing effect of process parameters in the process of cutting depth and feeding speed on the vibration condition of process system and thereby developing the mathematical model of variable amplitude for the spindle speed,feed per tooth and milling depth using the acceleration sensor spectral response value as the dynamic analysis indicators and ceramic tool wear and machined surface roughness as measure standard,The results show that given the milling width of 0. 7 mm,the milling depth of 31. 5 mm,the milling speed of 800 m/min,and the feed rate of each tooth of 0. 08 mm,there occurs the maximum amplitude of vibration in the vicinity of 10 k Hz,subjecting the work-piece the most intense vibration. The study may provide experimental support and theoretical guidance for the selection of processing parameters required for high speed milling of similar materials using ceramic tools.
This paper is concerned with the response to the vibration occurring in ceramic tools used for high speed milling of nickel based superalloy GH4169. The research building on the single factor experiment involves analyzing the processing effect of process parameters in the process of cutting depth and feeding speed on the vibration condition of process system and thereby developing the mathematical model of variable amplitude for the spindle speed,feed per tooth and milling depth using the acceleration sensor spectral response value as the dynamic analysis indicators and ceramic tool wear and machined surface roughness as measure standard,The results show that given the milling width of 0. 7 mm,the milling depth of 31. 5 mm,the milling speed of 800 m/min,and the feed rate of each tooth of 0. 08 mm,there occurs the maximum amplitude of vibration in the vicinity of 10 k Hz,subjecting the work-piece the most intense vibration. The study may provide experimental support and theoretical guidance for the selection of processing parameters required for high speed milling of similar materials using ceramic tools.
引文
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[8]张定华,姚倡锋,任敬心,等.磨削参数对GH4169高温合金磨削表面特征影响研究[J].机械工程学报,2014,24(2):210-214.
[2]刘维伟,李锋,任军学,等.基于标准粒子群算法的GH4169高速铣削表面粗糙度研究[J].中国机械工程,2011,22(2):2654-2656.
[3]丁烨.铣削动力学稳定性分析方法与应用[D].上海:上海交通大学,2011.
[4]陈响,马伟民,马雷,等.用数值仿真Al2O3/Zr O2(Y2O3)陶瓷刀具的切削参数[J].机械工程学报,2013,21(9):185-192.
[5]郑光明,赵军,徐汝锋,等.陶瓷刀具超高速铣削镍基高温合金刀具失效机理研究[J].组合机床与自动化加工技术,2014,10(4):126-130.
[6]刘战强,万熠,艾兴.高速铣削过程中表面粗糙度变化规律的实验研究[J].现代制造工程,2002(3):8-9.
[7]田霖,傅玉灿,杨路,等.基于速度效应的高温合金高速超高速磨削成屑过程及磨削力研究[J].机械工程学报,2013,49(5):169-177.
[8]张定华,姚倡锋,任敬心,等.磨削参数对GH4169高温合金磨削表面特征影响研究[J].机械工程学报,2014,24(2):210-214.