干式铣削Al-50wt%Si高硅铝合金刀具磨损与表面粗糙度评价  

Evaluation of Tool Wear and Surface Roughness of Dry Milling Al-50wt%Si High Silicon Aluminum Alloy

作　　者：牛秋林[1] 张深圳 荆露 李爽 李鹏南[1] NIU Qiulin;ZHANG Shenzhen;JING Lu;LI Shuang;LI Pengnan(School of Mechanical Engineering,Hunan University of Science and Technology,Xiangtan 411201)

机构地区：[1]湖南科技大学机电工程学院,湘潭411201

出　　处：《宇航材料工艺》2023年第3期48-54,共7页Aerospace Materials & Technology

基　　金：国家自然科学基金(52075168、51605161);湖南省教育厅优青项目(19B190);湖南科技大学科学研究基金(KJ-2042)。

摘　　要：本文以Al-50wt%Si高硅铝合金为研究对象,采用单因素试验方法进行无涂层硬质合金刀具干式铣削试验,分析切削参数对刀具磨损和表面粗糙度的影响。结果表明:表面粗糙度受每齿进给量的影响最显著,随每齿进给量的增加而增加,当每齿进给量从0.07 mm/z增加到0.16 mm/z时,表面粗糙度增加2倍;刀具磨损受切削速度的影响最显著,随切削速度的增加而增加,当切削速度从140 m/min增加到260 m/min时,切削总长度降低3倍,而刀具后刀面磨损量仅是260 m/min速度下的0.8倍;表面粗糙度随刀具磨损的增加呈现先增加后降低的变化趋势,切削长度从350 mm增加到1750 mm,刀具磨损量平均增加4.5倍,而表面粗糙度却下降2倍;硬质合金刀具主要的磨损形式为磨粒磨损、崩刃。This paper takes Al-50wt%Si high-silicon aluminum alloy as the research object,and adopts single factor test method to carry out dry milling test of uncoated carbide tools to analyze the influence of cutting parameters on tool wear and surface roughness.The results show that the surface roughness is most significantly affected by the feed per tooth,and increases with the increase in the feed per tooth.When the feed per tooth increases from 0.07 mm/z to 0.16 mm/z,the surface roughness increased by 2 times;tool wear is most significantly affected by cutting speed,and increases with the increase of cutting speed.When the cutting speed increases from 140 m/min to 260 m/min,the total cutting length decreases by 3 times,but the wear on the flank of the tool is only 0.8 times that at a speed of 260 m/min;the surface roughness increases first and then decreases with the increase of tool wear.The cutting length increases from 350 mm to 1750 mm,the tool wear increases by 4.5 times on average,while the surface roughness decreases by 2 times;the main wear forms of cemented carbide tools are:abrasive wear and chipping.

关 键 词：高硅铝合金 刀具磨损 切削参数 表面粗糙度 

分 类 号：TG506.7[金属学及工艺—金属切削加工及机床]