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D. Begic-Hajdarevic, B. Vučijak, Mugdim Pasic, I. Bijelonja
4 2017.

ANALYSIS OF THE INFLUENCE OF CUTTING PARAMETERS ON SURFACE ROUGHNESS IN LASER CUTTING PROCESS OF TUNGSTEN ALLOY USING CONTROL CHARTS

Original scientific paper The paper presents analysis of the influence of cutting parameters on surface roughness during CO2 laser cutting process of tungsten alloy by using nitrogen as assist gas, based on control charts made by statistical process control (SPC) approach. Dependent variable is surface roughness, while independent variables are laser power and cutting speed. The control chart used within this paper is a variation of the moving means chart of experimental data samples, that calculates mean and range values using the three consecutive individual values. Applying the criteria often used in the SPC methods for the assessment of "out of control" situations, it may be inferred that increasing the cutting speed leads to worsening of control status for the process with lower laser power used.

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