Abstract
Composites are widely used in all the fields because of its favorable properties over conventional materials. Medium Density Fiberboard (MDF) is an extensively used wood composite in furniture industries. Drilling is the most commonly used machining process in the assembly. The surface quality of the hole depends upon the cutting conditions. The drilling damages like delamination reduces the structural reliability of the laminates and also affects the assembly of parts, appearance and the performance of the final product. The objective of this study is to analyze the influence of cutting parameters in a systematic approach on delamination in drilling of prelaminated MDF wood panels with High Speed Steel (HSS) twist drills of different diameters. The drilling experiments were planned and performed using Taguchi design. Response Surface Methodology (RSM) based mathematical model is developed to predict the influence of process parameters. The adequacy of the model is checked using Analysis of Variance (ANOVA). The results showed that the most dominant factor which influences the delamination is feed rate followed by the drill diameter. Keywords: Wood Composite Panels, Drilling, Delamination, Taguchi Design, Response Surface Methodology (RSM).
Highlights
Wood based composites are manufactured from waste wood particles such as saw dust, mill shavings, wood chip and smaller diameter trees
The drilling experiments were performed on wood composite panels using Taguchi design of experiments and a mathematical model was developed using Response Surface Methodology (RSM)
Based on the experimental results, Taguchi technique and the mathematical model developed using RSM technique, the following conclusions can be drawn in drilling of wood composite panels with High Speed Steel (HSS) twist drills:
Summary
Wood based composites are manufactured from waste wood particles such as saw dust, mill shavings, wood chip and smaller diameter trees. Prakash and Palanikumar [10] studied the effect of drilling parameters and observed that the increase in drill diameter increases the delamination.Valarmathi and Palanikumar [11] performed drilling experiments on laminated MDF panels to minimize the delamination and found that thrust force developed in drilling can be reduced with high spindle speed and low feed rate. Valarmathi et al [12, 13] conducted drilling experiments on plain and laminated MDF panels using high speed steel and carbide drills of 10 mm diameter with three different point angles and developed a mathematical model to evaluate the effect of drilling parameters on thrust force They found that low feed rate and high spindle speed are the preferable cutting conditions to reduce the thrust force in drilling of MDF panels. The present investigation deals with the measurement and analysis of delamination in drilling wood composite panels
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