摘要
针对高硅铝合金加工表面质量差和切削刀具磨损严重等问题。选择70%Si/Al(Si的质量分数为70%)合金材料,采用人造多晶金刚石(PCD)刀具,分别进行以主轴转速与进给量为变量的单因素铣削试验,探索主轴转速与进给量对刀具磨损程度、加工表面质量和加工表面粗糙度的影响。试验结果显示,铣削过程中PCD铣刀主要的磨损形式为Si颗粒的高频冲击和刻划造成的磨粒磨损。在主轴转速为10000 r/min、进给量为0.03 mm/r的铣削参数下,铣削距离达100 m以上,刀具磨损量较小,加工表面粗糙度较低,表面质量较好。由于存在Si颗粒碎裂、拔出、切断、压入等现象,铣削表面形成凹坑和沟痕等缺陷。随着铣削参数的变化,Si颗粒破损形式发生改变,铣削表面微观形貌出现差异,由此对工件表面粗糙度造成一定程度的影响。
Severe tool wear and deteriorated machined surfaces with defects are major problems in cutting highvolume fraction silicon aluminum alloys.The single factor milling experiments of spindle speed and feed rate of 70%Si/Al(mass fraction is 70%)alloy with artificial polycrystalline diamond(PCD)tools are carried out.The influence of spindle speed and feed rate to cutting tools wear,machined surface quality and roughness are explored.Based on the experimental results,the main tool wear modes of the PCD tools are abrasive wear,which is due to the impact and scratching of hard silicon particles in milling processes.Under the milling parameters of 10000 r/min spindle speed and 0.03 mm/r feed rate,the milling distance is more than 100 m,the tool wear is smaller,the machined surface roughness is lower,and the surface quality is better.The damages on machined surfaces are mainly pits and grooves,which are due to the rupturing,pulling out,cutting off and pressing of hard silicon particles.With the change of milling parameters,the damage form of Si particles changes,and the micromorphology of milling surface is different,which has a certain impact on the surface roughness of workpiece.
作者
李逸林
张明亮
吉红伟
吕维迪
Li Yilin;Zhang Mingliang;Ji Hongwei;Lyu Weidi(Beijing Institute of Radio Measurement,Beijing 100854,China;不详)
出处
《工具技术》
北大核心
2025年第8期57-62,共6页
Tool Engineering
作者简介
第一作者:李逸林,硕士,工程师,北京无线电测量研究所,100854北京市。
