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Optimization of process parameters during end milling and prediction of work piece temperature rise

N.L. Bhirud R.R. Gawande

Archive of Mechanical Engineering | 2017 | vol. 64 | No 3 | 327-346 | DOI: 10.1515/meceng-2017-0020

Keywords dry end milling Al 6063 Taguchi method ANOVA regression analysis

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Abstract

During the machining processes, heat gets generated as a result of plastic deformation of metal and friction along the tool–chip and tool–work piece interface. In materials having high thermal conductivity, like aluminium alloys, large amount of this heat is absorbed by the work piece. This results in the rise in the temperature of the work piece, which may lead to dimensional inaccuracies, surface damage and deformation. So, it is needed to control rise in the temperature of the work piece. This paper focuses on the measurement, analysis and prediction of work piece temperature rise during the dry end milling operation of Al 6063. The control factors used for experimentation were number of flutes, spindle speed, depth of cut and feed rate. The Taguchi method was employed for the planning of experimentation and L18 orthogonal array was selected. The temperature rise of the work piece was measured with the help of K-type thermocouple embedded in the work piece. Signal to noise (S/N) ratio analysis was carried out using the lower-the-better quality characteristics. Depth of cut was identified as the most significant factor affecting the work piece temperature rise, followed by spindle speed. Analysis of variance (ANOVA) was employed to find out the significant parameters affecting the work piece temperature rise. ANOVA results were found to be in line with the S/N ratio analysis. Regression analysis was used for developing empirical equation of temperature rise. The temperature rise of the work piece was calculated using the regression equation and was found to be in good agreement with the measured values. Finally, confirmation tests were carried out to verify the results obtained. From the confirmation test it was found that the Taguchi method is an effective method to determine optimised parameters for minimization of work piece temperature.

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Authors and Affiliations

N.L. Bhirud

R.R. Gawande

Research Scholar, Bapurao Deshmukh College of Engineering, RSTMU, Nagpur and Mechanical Engineering Dept, Sandip Institute of Engineering & Management, Savitribai Phule Pune University, India.
Mechanical Engineering Dept, Bapurao Deshmukh College of Engineering, RSTMU, Nagpur, India