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Process Performance with Regards to Surface Roughness of the CO2 Laser Cutting of AA6061–T6 Aluminium Alloy
A. Parthiban, R. Ravikumar, B. Suresh Kumar and N. Baskar

Laser cutting requires dependable prediction models for estimates of the process performance on surface roughness. For that reason this paper focused on investigations into machining parameters of CO2 laser cutting of the aluminium alloy AA 6061-T6 surface roughness because AA 6061-T6 plays a vital role in aeronautical and automobile construction. Design of experiments (DOE) was brought in to design the experimental arrangement for analysis. Due to this three level of parameters considered, the Box-Behnken design was used and it is utilized to develop the experimental layout of AA 6061-T6 CO2 laser cutting. Indeed, if this needs of work are required to study the influence of cutting condition on surface roughness with DOE concepts. Generally the significant input parameters studies as like previous are laser power, cutting speed, gas pressure and focal position. The same is investigated and presented in this work. Examine that the regression model is used to build the surface roughness model for laser cutting was constructed using response surface methodology (RSM). Subsequently, the validations of experimental results were carried out in this paper. Although finally results show that the linear model has the best agreement with experimental results. The same is presented and reported in this study.

Keywords: CO2 laser, aluminium alloy, AA 6061-T6, cutting, surface roughness, process parameters, design of experiments (DOE), response surface methodology (RSM), Box-Behnken design

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