Dynamics Analysis of Spindle-bearing Systems on Spiral Bevel Gear Cutting Machines

Abstract

Abstract: Tool spindle systems of spiral bevel gear milling machines often produced chatters in machining processes, which affectsed the quality of workpieces. According to the lumped mass method, an equivalent dynamics model of tool spindle systems was established. Stiffness matrix of spindle rotor was obtained by using Timoshenko beam theory analysis. Based on mechanics analysis of tapered roller bearings, formulas for calculating the axial stiffness and radial stiffness of the bearings under axial preload were established. A dynamics model of tool spindle systems constructed by numerical analysis method was verified by force hammer excitation experiments. The comparison results show that the dynamics model may effectively reflect the dynamics characteristics of tool spindle systems.

Key words: rotor system dynamics, discrete lumped masses method, Timoshenko beam, stiffness matrix, numerical analysis

摘要： 螺旋锥齿轮铣齿机的刀具主轴系统在加工中易出现颤振现象，影响工件的加工质量。针对这一问题，依据集总质量法，构建了刀具主轴系统等效动力学模型；采用Timoshenko梁理论分析得到了主轴转子的刚度矩阵；通过对圆锥滚子轴承的力学分析，构建了轴承在轴向预载荷作用下的轴向刚度和径向刚度计算式。利用力锤激励实验对采用数值分析法构建的刀具主轴系统的动力学模型进行了验证，对比结果表明所构建的动力学模型可以有效反映刀具主轴系统的动力学特性。

关键词: 转子系统动力学, 集总质量法, Timoshenko梁, 刚度矩阵, 数值分析

CLC Number:

TG61
TH113.1

WANG Zhiyong;DU Weitao. Dynamics Analysis of Spindle-bearing Systems on Spiral Bevel Gear Cutting Machines[J]. China Mechanical Engineering.

王志永;杜伟涛. 螺旋锥齿轮铣齿机主轴\|轴承系统的动力学分析[J]. 中国机械工程.

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