Optimization of Process Parameters Using Taguchi Coupled Genetic Algorithm: Machining in CNC Lathe

Optimization of Process Parameters Using Taguchi Coupled Genetic Algorithm: Machining in CNC Lathe

Supriyo Roy (Birla Institute of Technology, India), J. Paulo Davim (University of Aveiro, Portugal) and Kaushik Kumar (Birla Institute of Technology, India)
DOI: 10.4018/978-1-5225-1639-2.ch004
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Abstract

In the era of mass manufacturing, Material removal rate and Surface Roughness are of primary concern even in manufacturing using contemporary CNC machines. In this work, L27 Orthogonal Array of Taguchi method is selected for three parameters (Depth of cut, Feed and Speed) with three different levels to optimize the turning parameters for Material Removal Rate and Surface Roughness on an EMCO Concept Turn 105 CNC lathe for machining SAE 1020 material with carbide tool. The MRR and SR are observed as the objective to develop the combination of optimum cutting parameters. The objectives were optimized using Taguchi, Grey Taguchi and NSGA-II. The result from these techniques was compared to identify the optimal values of cutting parameters for maximum MRR, minimum SR and best combination of both. This study also produced a predictive equation for determining MRR and SR for a given set of parameters outside the considered values. Thus, with the proposed optimal parameters it is possible to increase the efficiency of machining process and decrease production cost in CNC Lathe.
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Terminology: Turning Operation

It is a machining process in which a rotating workpiece is machined using a non-rotary tool bit. The tool follows a helical path while moving linearly over the work piece. Usually the term ‘turning’ means generation of external surfaces by cutting action resulting from the shearing between the tool and the work piece. Turning can be done manually, in a traditional form of lathe, which frequently requires continuous supervision by the operator, or by using an automated lathe which does not require any supervision. In this work a computer numerical control lathe is used for turning operations. The turning processes can be of broadly classified into four different types straight turning, taper turning, profiling and grooving. These types of turning processes produce various shapes of materials such as straight, conical, curved or grooved workpiece. In this present study, work with straight turning was performed by using single-point cutting tool.

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