AlTiN涂层刀具精铣TC4钛合金工艺参数的影响与优化

采用AlTiN涂层4刃φ10 mm硬质合金立铣刀,在VMC850立式加工中心上对TC4钛合金进行铣削精加工试验.利用高精密数字化检测设备,对加工成形的TC4钛合金试件表面粗糙度、平面度、平行度、表面形貌、残余应力及显微硬度测量.分析AlTiN涂层刀具在设定不同工艺参数条件下TC4钛合金的整体加工质量和表面形貌变化规律....

Influence and optimization of technological parameters in high speed milling TC4 titanium alloy with AlTiN coated cutter

Using AlTiN coated 4-edge?10 mm carbide end milling cutter,the milling finishing experiment of TC4 titanium alloy was carried out on VMC850 vertical machining center.The surface roughness,flatness,parallelism,surface morphology,residual stress and microhardness of the machined TC4 titanium alloy specimen were measured by using high precision digital testing equipment.The overall machining quality and surface morphology of TC4 titanium alloy with AlTiN coated tool under different process parameters were analyzed.The results show that under the optimal finishing process parameters of spindle speed n=8000 r/min,feed per tooth f z=0.04 mm/z,and cutting depthΔd=0.5 mm,TC4 titanium alloy workpiece has good machining quality and surface morphology,long tool life,flatness of 0.39μm,parallelism of 0.33μm,surface roughness of 0.70μm,surface residual stress of-175 MPa,and surface microhardness of 269 HV 0.2,thus realizing high-quality and high-efficiency finishing of TC4 titanium alloy.