微细切削中侧刃的切削影响研究  

Study on the Influence of Cutting for Peripheral Edge in Micro Cutting

作　　者：李阳 程祥[1] 周怀彪 郑光明[1] LI Yang;CHENG Xiang;ZHOU Huai-biao;ZHENG Guang-ming(School of Mechanical Engineering,Shandong University of Technology,Shandong Zibo 255000,China)

机构地区：[1]山东理工大学机械工程学院,山东淄博255000

出　　处：《机械设计与制造》2022年第5期1-4,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金(51505264)。

摘　　要：尺度效应是微切削工艺中的一种特殊现象,通常用最小未变形切屑厚度来判定尺度效应发生的临界点。为了更好地理解微细铣削的切削机理,对铣刀钝圆半径与尺度效应之间的关系进行深入研究是有必要的。由于在铣削加工过程中,刀具大多数为径向进给,侧刃为主要切削刃,因此这里对仅有侧刃参与切削的情况进行了仿真与试验研究。通过对仿真中切屑形貌与试验中表面粗糙度的分析,分别确定了仿真与试验的最小未变形切屑厚度值。仿真与试验结果表明,微细铣削的两种工艺方式对最小未变形切屑厚度的影响有限,最小未变形切屑厚度为(0.28~0.40)倍的铣刀钝圆半径。同时,工件的材料属性对刀具侧刃的最小未变形切屑厚度有一定的影响。本研究可以用于指导微细铣削加工中对于不同刀具钝圆半径及工件材料加工参数的选择和量化,提高工件加工质量具有重要参考价值。Size effect is a special phenomenon in micro cutting process.The critical point of size effect is usually determined by the minimum undeformed chip thickness.In order to better understand the cutting mechanism of micro milling,it is necessary to study the relationship between the cutting edge radius and the size effect.In the process of milling,most of the cutting tools are radial feed and the peripheral edges are the main cutting edges.Therefore,it conducts simulation and experimental research on the condition that only the side edges are engaged in cutting.By analyzing the chip morphology in simulation and the surface roughness in experiment,the minimum undeformed chip thickness values in simulation and experiment are determined respectively.Simulation and experimental results show that the two processes of micro milling have limited influence on the minimum undeformed chip thickness,the minimum undeformed chip thickness is(0.28~0.40)times of the cutting edge radius.At the same time,the material properties of the workpiece have certain influence on the minimum undeformed chip thickness of the cutting edge.This study can be used to guide the selection and quantification of different cutting edge radius and machining parameters of workpiece materials in micro milling.

关 键 词：微细铣削 尺度效应 最小未变形切屑厚度 钝圆半径 侧刃 

分 类 号：TH16[机械工程—机械制造及自动化] TG547[金属学及工艺—金属切削加工及机床]