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Subject: Industrial and Production Engineering × Author: Kshetri, Rahul × End date: 2019 × Start date: 2010 ×
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    ThesisItemOpen Access
    Investigations on machinability parameters of 7068 aluminium alloy using tin coated carbide positive rake tool bits
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2018-01) Kshetri, Rahul; Ajay
    The current work presents findings from the experimental investigation of the effect of cutting speed, feed rate and depth of cut on the feed force, cutting force and surface roughness, tool wear during turning of Aluminium alloy 7068, by using TiN coated carbide tool in dry condition. There are several dependent and independent parameters involved during orthogonal turning. Independent parameter are cutting speed, feed and depth of cut whereas, dependent parameters are feed force and cutting force components; measured by dynamometer. Due to generation of temperature in different zones, overall effect of temperature on tool tips has been measured by using thermal camera. The investigation is important because Al-7068 is difficult to machine and there is insufficient coverage on its study. Experimental work is carried out with the help of high speed lathe machine followed by measurement of force components and temperature at different input parameters. After machining, tool wear and surface roughness have been measured using scanning electron microscope (SEM) and surface roughness tester. Mathematical model in between all dependent and independent parameters have been developed using RSM. The causes of tool wear and their mechanism are also discussed in the present work. Surface plots are drawn for each mathematical model and their affects in different input parameters are presented with interaction and main affect plots. Tool wear and their mechanism with magnifying views of image are also reported in this work. Recommendations are drawn on the basis of analysis.