基于响应曲面法的TC32钛合金高速铣削加工表面粗糙度研究及参数优化

Research on Surface Roughness and Parameter Optimization of TC32 Titanium Alloy High Speed Milling Process Based on Response Surface Method

TC32是近年来出现的一种新型低成本中高强度高韧性钛合金。为了获取TC32钛合金表面加工质量与切削参数之间函数关系,选择表面粗糙度作为目标响应,以线速度v、每齿进给量fz、切削深度ap以及切削宽度ae为因素,设计了基于响应曲面法的试验方案,建立了TC32钛合金高速铣削加工表面粗糙度的二阶响应方程,并进行了方差分析和显著性检验。试验结果表明,以最小表面粗糙度为响应目标,铣刀底齿加工的最优参数组合为:线速度v=85m/min,每齿进给量f_(z)=0.07mm/z,切削深度a_(p)=0.80mm,切削宽度a_(e)=7.00mm;侧齿加工的最优参数组合为:线速度v=85m/min,每齿进给量f_(z)=0.07mm/z,切削深度a_(p)=22.38mm,切削宽度a_(e)=1.08mm。

TC32 is a new low-cost medium-high-strength high-toughness titanium alloy that has emerged in recent years.In order to obtain the functional relationship between the surface machining quality of this grade of titanium alloy and the cutting parameters,the surface roughness is selected as the target response,and the linear velocity v,the feed per tooth fz,the cutting depth ap and the cutting width ae are factors.The test program of response surface method,the second-order response equation of surface roughness of TC32 titanium alloy high-speed milling is established,variance analysis and significance test are carried out.The test results show that with the minimum surface roughness as the response target,the optimal parameters for milling cutter bottom tooth machining are v=85m/min,f_(z)=0.07mm/z,depth of cut a_(p)=0.80mm,width of cut a_(e)=7.00mm,side the optimal parameters for tooth processing are v=85m/min,f_(z)=0.07mm/z,a_(p)=22.38mm,and cutting width a_(e)=1.08mm.