Effect of Cutting Parameters on Thrust Force and Surface Roughness in Drilling of Al-2219/B4C/Gr Metal Matrix Composites

International Conference on Advances in Materials and Manufacturing Applications 2016

Ravindranath, V.M.^1 ; Basavarajappa, G.S. Shiva Shankar S.^2 ; Suresh, R.^3

R and D Centre, Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkur, Karnataka

572103, India^1

Department of Studies in Mechanical Engineering, University BDT College of Engineering, Davangere, Karnataka

577004, India^2

Department of Mechanical, Engineering Alliance University, Bangalore, Karnataka, 562106, India^3

关键词: Aluminium matrix composites;    Cutting parameters;    Graphite particles;    Hard ceramic particles;    Hybrid composites;    Liquid metallurgies;    Lubricant properties;    Surface finishes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/149/1/012103/pdf
DOI  :  10.1088/1757-899X/149/1/012103

来源: IOP

【 摘 要 】

In aluminium matrix composites, reinforcement of hard ceramic particle present inside the matrix which causes tool wear, high cutting forces and poor surface finish during machining. This paper focuses on effect of cutting parameters on thrust force, surface roughness and burr height during drilling of MMCs. In the present work, discuss the influence of spindle speed and feed rate on drilling the pure base alloy (Al-2219), mono composite (Al- 2219+8% B4C) and hybrid composite (Al-2219+8%B4C+3%Gr). The composites were fabricated using liquid metallurgy route. The drilling experiments were conducted by CNC machine with TiN coated HSS tool, M42 (Cobalt grade) and carbide tools at various spindle speeds and feed rates. The thrust force, surface roughness and burr height of the drilled hole were investigated in mono composite and hybrid composite containing graphite particles, the experimental results show that the feed rate has more influence on thrust force and surface roughness. Lesser thrust force and discontinuous chips were produced during machining of hybrid composites when compared with mono and base alloy during drilling process. It is due to solid lubricant property of graphite which reduces the lesser thrust force, burr height and lower surface roughness. When machining with Carbide tool at low feed and high speeds good surface finish was obtained compared to other two types of cutting tool materials.