Optimum combination of machining parameters during drilling of Aluminium 7075 alloys using Grey based Taguchi approach

Abstract

From ancient days to till today manufacturing industries, especially making of holes on the parts during drilling process for precision assembling of parts facing problems with burr formation. Drilling operation is one of the finishing operation in the production cycle, removing of burrs during drilling process is a time consuming and non-value added process to the manufacturing sector. So reducing the size of burrs is the main aim of the present study. In the present work, optimization of burr size is considered during drilling of aluminium 7075 alloy. From Grey relational grades of responses selected optimal combination of parameters to attain multiple performance characteristics of responses with a corresponding higher grey relational grade. For identifying the most significant input parameters that influence the output responses ANOVA is conducted. Finally, observations reveals that feed rate, point and clearance angles are the most influential factors on burr size and also experimental results divulge that the lower the thrust force causes to decrease the burr height. The proposed approach is helpful to the budding entrepreneurs in the related areas to select optimal combination of drilling parameters to attain multiple performance characteristics of responses especially in burr size to prevent the post finishing operations.

Effect of Cutting Parameters and Tool Geometry on the Performance Analysis of One-Shot Drilling Process of AA2024-T3

“…Moreover, a low f and high point angle were suggested for attaining minimum surface roughness in the drilling of Al7075. In another study by Sreenivasulu and Rao [19], it was revealed that during the drilling of Al7075, the most influential parameters on burr height, thrust force, surface roughness, and circularity were f, point angle, and clearance angles, as compared to n and drill diameter. Kyratsis et al [20] concluded that tool diameter and f affected the thrust force and torque.…”