镗杆切削力感知单元结构设计与优化

Structure Design and Optimization of Cutting Force Sensing Unit for Boring Bar

为满足测量镗杆切削力的需求,采用ANSYSWorkbench有限元分析软件对镗杆等效应力与等效应变分析,确定感知单元安装位置。提出两种镗杆感知单元结构,运用响应曲面优化法确定感知单元最佳优化方案,通过计算、分析相关参数,来确定最佳的优化方案,并与优化前的感知单元结构方案进行比较。结果表明:当未超过应变式微力传感器最大等效应变时,均布式感知单元结构中镗杆最大测量值为329N;以附加支撑感知单元最大测量值为1000N为设计目标,获得5种最优结构参数,在实际设计制造中,可根据实际情况从中进行选择。

In order to meet the needs of measuring the cutting force of the boring bar,it uses ANSYS Workbench finite element analysis software to analyze the equivalent stress and equivalent strain of the boring bar,and determine the installation position of the sensing unit.Two boring bar sensing unit structures are proposed.The response surface optimization method is used to determine the best optimization plan of the sensing unit.The best optimization plan is determined through calculation and analysis of related parameters,and compared with the sensing unit structure plan before optimization.The results show that when the maximum equivalent strain of the strain-type micro-force sensor is not exceeded,the maximum measurement value of the boring bar in the uniform sensing unit structure is 329N;the maximum measurement value of the additional support sensing unit is 1000N as the design goal,and 5 optimal values are obtained Structural parameters,in actual design and manufacturing,can be selected according to the actual situation.