PET吹塑模型腔高速精加工表面粗糙度实验研究

摘要

针对聚对苯二甲酸乙二酯(PET)吹塑模型腔曲面精加工表面质量要求，为减少抛光作业工作量，提高型腔零件制造效率，通过高速铣削实验分析1.2085葛利兹模具钢精加工表面粗糙度(Ra)随切削参数的变化规律。结果表明，PET吹塑模型腔零件常用的1.2085葛利兹模具钢在200～300 m/min的高速加工速度区间，Ra随切削速度(Vc)变化无单调增减规律，但选择偏小的径向切削深度(ae)和每齿进给量(fz)获得的Ra亦小，当轴向切削深度(ap)选择在0.05～0.25 mm之间时，ap=0.15 mm获得的Ra值最小。各切削参数对Ra的影响顺序为：ap＞ae＞Vc＞fz。%Focus on the requirements of polyethylene terephthalate(PET) blow mould cavity finishing surface quality,in order to reduce the workload of the polishing operations and improve the manufacturing efficiency of the cavity parts,the change law of 1.2085 Gröditz mold steel high-speed finishing surface roughness with the variation of the cutting parameters was analyzed through high-speed milling experiment.The results show that when 1.2085 Gröditz mold steel used in PET blow mould cavity part is in high speed processing speed interval of 200 m/min~300 m/min,there is not a merely increasing or decreasing law for the surface roughness (Ra) with the cutting speed changes.However,Ra decreases when the values of radial cutting depth (ae) and feed per tooth (fz) are small.When the axial cutting depth (ap) is between 0.05~0.25 mm and ap=0.15 mm,the minimum value of Ra can be obtained. The influence order of various cutting parameters on Ra is:ap>ae>Vc>fz.