Study on Influence of Cutting Edge Radius on End Cutting Edge in Micro Milling
-
摘要: 在微细铣削过程中，刀具大多数为径向进给，侧刃为主要切削刃，针对侧刃进行的研究较多，但是缺少对底刃的研究，因此本文对仅有底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，分别确定了仿真与切削试验的最小未变形切屑厚度值。仿真与切削试验结果表明，最小未变形切屑厚度的仿真值与试验值没有明显差异，最小未变形切屑厚度为0.61 ~ 0.70倍的铣刀钝圆半径。根据仿真结果，发现切屑的形成受切削速度的影响。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，对于减少刀具磨损，提高微小工件加工质量，有较为重要的指导意义。Abstract: In the milling, most of the cutting tools are radial feed and the peripheral cutting edge is the main cutting edge. There are many researches on the peripheral cutting edge, but there is a lack of research on the end cutting edge. Therefore, the simulation and experimental research on the condition that only the end cutting edge engages in the cutting is conducted. By analyzing the chip morphology in simulation and the surface roughness in experiment, the minimum undeformed chip thickness in simulation and cutting experiments are determined respectively. Simulation and experimental results show that there is no significant difference between the simulation value and the experimental of the minimum undeformed chip thickness, and the minimum undeformed chip thickness is 0.61 ~ 0.70 times of the cutting edge radius. According to the simulation results, it is found that the chip formation is affected by the cutting speed. The present study can be used to guide the selection and quantification of different cutting edge radius and machining parameters of workpiece materials in micro milling, which has an important guiding for reducing the tool wear and improving the processing quality of workpiece.
-
表 1 切削参数
钝圆半径/μm 轴向切深ap/μm 5 1.5; 2.0; 2.5; 3.0; 3.5; 4.0 7 1.5; 2.5; 3.5; 4.5; 5.5; 6.5 9 2.5; 3.5; 4.5; 5.5; 6.5; 7.5 
下载: 导出CSV
表 2 最小未变形切削厚度仿真分析结果
钝圆半径/μm 最小未变形切削厚度hmin/μm 黄铜H59 不锈钢304 铝合金6061 5 3.5 3.5 3.5 7 4.5 4.5 4.5 9 5.5 5.5 5.5
下载: 导出CSV
表 3 最小未变形切削厚度试验分析结果
钝圆半径/μm 最小未变形切削厚度hmin/μm 黄铜H59 不锈钢304 铝合金6061 5 3.0 3.5 3.5 7 4.5 3.5 4.5 9 5.5 5.5 4.5
下载: 导出CSV
-
[1] 曹自洋, 何宁, 李亮, 等. 刀具切削刃钝圆对微细切削加工尺寸效应影响的有限元模拟研究[J]. 机械科学与技术, 2009, 28(2): 186-190 doi: 10.3321/j.issn:1003-8728.2009.02.011Cao Z Y, He N, Li L, et al. Finite element analysis of the influence of cutting edge radius on the size effect in micro cutting[J]. Mechanical Science and Technology for Aerospace Engineering, 2009, 28(2): 186-190 (in Chinese) doi: 10.3321/j.issn:1003-8728.2009.02.011 [2] 张海幸. 考虑尺度效应的Inconel718微铣削过程仿真及切削参数优化[D]. 辽宁大连: 大连理工大学, 2018.Zhang H X. Simulation of micro-milling Inconel718 considering size effect and optimization of cutting parameter[D]. Liaoning Dalian: Dalian University of Technology, 2018 (in Chinese). [3] 毛海俊. 基于尺度效应的微细铣削加工精度表征方法及质量控制研究[D]. 北京: 北京理工大学, 2016.Mao H J. Research of accuracy characterization and quality control in the area of micro milling considering scale effect[D]. Beijing: Beijing Institute of Technology, 2017 (in Chinese). [4] 张升, 程祥. 微细铣削工艺参数优化实验研究[J]. 机械设计与制造, 2014,(5): 91-94 doi: 10.3969/j.issn.1001-3997.2014.05.030Zhang S, Cheng X. An experimental analysis of micromilling process parameters[J]. Machinery Design & Manufacture, 2014,(5): 91-94 (in Chinese) doi: 10.3969/j.issn.1001-3997.2014.05.030 [5] 杨军, 陈云, 单世远, 等. 基于Deform 3D的刀具切削刃钝圆半径的优化设计[J]. 工具技术, 2012, 46(12): 45-48 doi: 10.3969/j.issn.1000-7008.2012.12.013Yang J, Chen Y, Shan S Y, et al. Optimized designation of cutting edge radius based on Deform 3D[J]. Tool Engineering, 2012, 46(12): 45-48 (in Chinese) doi: 10.3969/j.issn.1000-7008.2012.12.013 [6] 董经达, 李晓舟, 孟宪东, 等. 切削刃钝圆半径对微切削过程的影响[J]. 工具技术, 2017, 51(12): 63-66 doi: 10.3969/j.issn.1000-7008.2017.12.015Dong J D, Li X Z, Meng X D, et al. Influence of rounded cutting edge radius on micro cutting process based on FEM[J]. Tool Engineering, 2017, 51(12): 63-66 (in Chinese) doi: 10.3969/j.issn.1000-7008.2017.12.015 [7] 折小荣, 苏明, 令狐克均. 切削用量和钝圆半径对铣削45号钢的温度研究[J]. 现代机械, 2015,(5): 22-25Zhe X R, Su M, Linghu K J. Influence of cutting parameters and rounded edge radius on milling temperature of 45 steel[J]. Modern Machinery, 2015,(5): 22-25 (in Chinese) [8] 赵孟. 微细铣削尺寸效应基础研究[D]. 南京: 南京航空航天大学, 2014.Zhao M. Research on basis of size effect in micro milling[D]. Nanjing: Nanjing University of Aeronautics and Astronautics, 2014 (in Chinese). [9] Cheng X, Liu J C, Zheng G M, et al. Study of microcutting fundamentals for peripheral and end cutting edges in micro-end-milling[J]. Journal of Micromechanics and Microengineering, 2018, 28(1): 015011 doi: 10.1088/1361-6439/aa9a73 [10] Cheng X, Wei X T, Yang X H, et al. Unified criterion for brittle–ductile transition in mechanical microcutting of brittle materials[J]. Journal of Manufacturing Science and Engineering, 2014, 136(5): 051013 doi: 10.1115/1.4027996 [11] Ng C K, Melkote S N, Rahman M, et al. Experimental study of micro- and Nano-scale cutting of aluminum 7075-T6[J]. International Journal of Machine Tools and Manufacture, 2006, 46(9): 929-936 doi: 10.1016/j.ijmachtools.2005.08.004 [12] 孟繁杰. 微尺度铣削工艺参数研究[D]. 山东淄博: 山东理工大学, 2017.Meng F J. Process parameters of micromilling[D]. Shandong Zibo: Shandong University of Technology, 2017 (in Chinese). [13] Zhang P, Zhu H T, Huang C Z, et al. Finite element simulation of minimum cutting thickness in micro-cutting[J]. Materials Science Forum, 2016, 861: 50-55 doi: 10.4028/www.scientific.net/MSF.861.50 [14] De Oliveira F B, Rodrigues A R, Coelho R T, et al. Size effect and minimum chip thickness in micromilling[J]. International Journal of Machine Tools and Manufacture, 2015, 89: 39-54 doi: 10.1016/j.ijmachtools.2014.11.001 [15] 张升, 程祥, 杨先海, 等. 超精密桌面微细铣削机床的研制[J]. 机械设计与制造, 2014,(1): 110-112 doi: 10.3969/j.issn.1001-3997.2014.01.034Zhang S, Cheng X, Yang X H, et al. Development of a desktop ultra-precision micro milling machine[J]. Machinery Design & Manufacture, 2014,(1): 110-112 (in Chinese) doi: 10.3969/j.issn.1001-3997.2014.01.034 -
点击查看大图
图(9) / 表(3)
计量
- 文章访问数: 208
- HTML全文浏览量: 21
- PDF下载量: 23
- 被引次数: 0
