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一种减振精镗刀结构设计及动态特性仿真研究 被引量:1

Structure Design and Dynamic Characteristic Simulation Study of a Vibration Damping Boring Cutter
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摘要 针对大长径比镗刀精镗深孔出现的振动问题,根据动力学理论建立了减振镗杆的数学理论模型,得出了影响减振效果的几个关键参数:动力吸振器和主振动系统的质量比、固有频率比、阻尼器的阻尼比等。完成了减振镗杆结构尺寸设计,确定了动力吸振器的参数值、几个核心部件的关键尺寸和材料、减振块的外形尺寸和材料、弹簧橡胶的内外径和轴向长度尺寸及相关材料和刚度值、阻尼液的阻尼系数及相关材料等。建立了减振镗杆的实体三维模型。通过ADAMS软件对减振镗杆作了仿真验证,得到了减振镗杆的幅频响应曲线,仿真验证了将弹簧刚度值和黏性阻尼比作为影响减振效果关键参数的正确性;针对两种不同类型镗杆作了仿真对比,得出所设计的减振镗杆减振幅度约为实心镗杆的3倍以上,可以大幅抑制镗杆的振幅并迅速缩短振动周期,对机床切削颤振具有很好的抑制作用。 Aiming at the flutter problem of boring boring deep hole with large length diameter ratio boring cutter,a mathematical model of damping boring bar is established according to the theory of dynamics.Several key parameters affecting the damping effect were obtained:the mass ratio of dynamic absorber and main vibration system,natural frequency ratio and damping ratio of damper.The size design of the vibration boring and boring bar was completed,the parameters of the dynamic vibration absorber,the key dimensions and materials of the core components,the dimensions and materials of the damping block,the internal and external diameter and the axial length of the spring rubber,the relative material and stiffness value,the damping coefficient of the damping fluid and the related materials were made.The solid three-dimensional(3D)model of the vibration boring and boring bar was established.The vibration damping boring bar was simulated and verified by ADAMS software.The amplitude frequency response curve of the damping boring bar was obtained,and the correctness of the key parameters affecting the damping effect was verified by simulation.The spring stiffness value and the viscous damping ratio were obtained.Then the simulation comparison was made for the two kinds of different types of boring bars,and the damping amplitude of the vibration boring and boring bar was about three times more than that of the solid bell rod.The amplitude of the boring bar can be greatly suppressed,and shorten the vibration period quickly,which has a good inhibition effect on cutting chatter of machine tools.
作者 侯学元 任学平 任翀 郭如飞 HOU Xueyuan;REN Xueping;REN Chong;GUO Rufei(Engineering Training Center,Inner Mongolia University of Science&Technology,Baotou Inner Mongolia 014010,China;Inner Mongolia First Machinery Group Corporation,Baotou Inner Mongolia 014010,China)
出处 《机床与液压》 北大核心 2019年第21期78-83,共6页 Machine Tool & Hydraulics
基金 内蒙古自治区自然基金资助项目(2017MS0533) 内蒙古科技大学横向课题(2018020)
关键词 减振镗杆 动力学仿真 动力减振器 深孔加工 ADAMS Damping boring bar Dynamic simulation Dynamic shock absorber Deep hole processing ADAMS
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