Authors : A.G.F. Alabi, T.K. Ajiboye and H.D. Olusegun
Abstract: This study was carried out to on medium carbon steel subjected to various form of heat treatment operations by assessing the temperature distribution during the machining process. The model of oblique band heat source, moving in the direction of cutting in an infinite medium with an appropriate image heat source was used in this investigation. The model analysis was carried out separately on both the chip, the tool and the work material to numerically determined the temperature distribution during machining process using Finite Element Method with nodal grids. Johnson-Cook Model was used to determine the work materials flow stress upon which the material properties were determined. Stress/strain tests were conducted on the specimens to determine the materials’ constant parameters which were used as the input parameters to the modeling equation written in Visual Basic 6.0. The optimum shear angle of 20° was used for the machining process and the frictional characteristics were also determined. The temperature along the shear plane AB was determined with reference to coordinate axis within the tool, workpiece and the chip using the model. The results which compare favourably with other results from literatures, provide basis for the design of machining variables for optimum and quality machined products which can also be applied in the computer programming of NC machine for precision machining.
A.G.F. Alabi, T.K. Ajiboye and H.D. Olusegun, 2012. Investigation of Cutting Temperatures Distribution in Machining Heat Treated Medium Carbon Steel on a Lathe. Journal of Engineering and Applied Sciences, 7: 113-122.