Response Surface Model (RSM) of CO₂ laser cutting

Mohamed Ayub Khan, Muhamad Haziq (2017) Response Surface Model (RSM) of CO₂ laser cutting. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Laser cutting has great ability in cutting material and the use of laser cutting become widely in manufacturing field. In this paper, experimental investigation into 6 mm thickness of mild steel has been carried out. Influence of laser cutting machine parameters on 6 mm thickness mild steel in term of surface roughness and kerf width will be experimentally investigated. There are so many ways to optimize the parameter in laser cutting such as Taguchi, Full Factorial design, and Response Surface Model (RSM). Among these design of experiment, previous research has shown that Response Surface Model (RSM) is more critical and accurate compared to others. Thus, Response Surface Model (RSM) has been applied in this study to minimize the number of experiment, and selecting the optimal conditions of parameter. Response surface methodology based optimal parametric analysis has been performed to determine the optimal setting of process parameters which are cutting speed, frequency and duty cycle to achieved minimum kerf width and surface roughness. Cutting speed and duty cycle has significant effect to the response, however in interaction frequency shows it significant effect. Minimum surface roughness and kerf width has been obtained as 2.61

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