Surface roughness study on mild steel in high speed turning process

• Main Author: Muhammad Kamal Aysraf, Pubin
• Format: Thesis
• Language: English; English
• Published: 2016
• Subjects: T Technology (General); TJ Mechanical engineering and machinery
• Online Access: http://eprints.utem.edu.my/id/eprint/20458/1/Surface%20roughness%20study%20on%20mild%20steel%20in%20high%20speed%20turning%20process.pdf; http://eprints.utem.edu.my/id/eprint/20458/2/Surface%20Roughness%20Study%20On%20Mild%20Steel%20In%20Conventional%20Turning%20Process%20Under%20Three%20Condition%20Cutting%20Fluids.pdf; http://eprints.utem.edu.my/id/eprint/20458/; http://library.utem.edu.my:8000/elmu/index.jsp?module=webopac-d&action=fullDisplayRetriever.jsp&szMaterialNo=0000105494

Surface integrity was the surface condition of a workpiece after being modified by a manufacturing process and it can change the material's properties.In surface topography, surface roughness (Ra) was concerned with the geometry of the outermost layer of the workpiece texture and the interface exposed with the environment affects several functional attributes of parts,such as friction,wear and tear,light reflection,heat transmission,ability of distributing and holding a lubricant,coating etc.Therefore, the desired surface finish was usually specified and appropriate processes were required to assess and maintain the quality of a component.The research was to investigate the influence of machining parameters and optimum process parameter to the surface roughness value of mild steel material in high speed turning using chemical vapor deposition (CVD) coated carbide insert in dry condition.Two level factorial design of experiment were selected to arrange the cutting parameters of cutting speed with range of 270 to 450m/min and the feed rate with 0.1 to 0.3mm/rev.The values were recorded for each 1.6mm constant depth of cut until flank wear (Vb) reached 0.2mm on the insert.From the experimental results,high cutting speed significantly produced fine surface roughness and high feed rate resulted to a rougher surface roughness.Optimizations of parameters show that cutting speed with 450m/min and feed rate of O.lmm/rev obtain a minimum surface roughness of 1.31 um.The mathematical modeling analysis for the surface roughness (Ra) on mild steel equal to 0.545-6.835x 10-4 * Cutting Speed + I 0.695 * Feed Rate.