Optimization Of Laser Cutting Parameters On Surfaced Cutting

Mohd Raman, Fazrin Khalilah (2019) Optimization Of Laser Cutting Parameters On Surfaced Cutting. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This particular report emphasizes a study on optimizing the laser cutting parameters on surfaced cutting for galvanized iron. Galvanized iron is widely used in construction projects and even children’s playground equipment such as bicycle racks and swing sets due to its anti-rust feature. It is crucial to know the surface quality of the material that used laser cutting process as it leads to the safety issue. Due to this fact, the purpose of this research is to find the effect of focal spot positioning and assisted gas pressure in laser cutting. These parameters are both attained from the screening analysis. The focal spot positioning is divided into three spots which is at above, below and on the material surface. As for the assisted gas pressure, the range is obtained from the pilot testing which is 1 bar until 8 bar. The surface roughness is the process response that will be obtained at the end of the experiment by using a portable surface roughness tester. The cutting speed and the consumed power of the laser are set to be constant for both parameters. The machine that is utilized in this study is Mitsubishi Electric model ML2512HV2-R PLUS. Design of experiment (DoE) technique was applied to plan the whole study. two level factorial design by using Design- Expert® Software is used to design the experiment. Based on ANOVA analysis, the assisted gas pressure is more significant than focal positioning in terms of surfaced cutting. In fact, a mathematical model is developed from the ANOVA analysis and the percentage of error had been verified between the model value and experimental value which is around 2.67%. At the end of the study, the optimum responses are obtained at focal positioning at -1 mm and assisted gas pressure at 8 bar. The error of optimization between the experimental and model is 3.7%.

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