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Analysis of the effecting parameters on laser cutting process by using response surface methodology (RSM) method

Hasan H. K.

Journal of Achievements in Materials and Manufacturing Engineering

2022

Vol. 110, nr 2

59--66

Purpose: The main aim of this research is to analyse the effects of the laser cutting parameters on the kerf width of stainless steel (2505), and develop a model of laser cutting that can predict the relation between the characteristics of the resultant kerf width and the process input parameters. Design/methodology/approach: To achieve the minimum kerf width; the optimal setting of the effecting parameters like; power supply, cutting speed, and gas pressure for the response surface methodology, and factorial design-based optimal parametric analysis has been carried out for this purpose. A mathematical model for analysis of the kerf width was developed using the (Minitab 16) on the basis of experimental results. Findings: It’s found that the interaction between power value, cutting speed, and pressure has a significant effect on the response value. Also, it’s found that, when the power and cutting speed are set at optimal values i.e. 1250 watt and 5 mm/min, the minimum kerf width will be 0.389 mm. The mathematical model has been established based on regression analysis by factorial design and response surface model. Research limitations/implications: The cutting quality in this process widely depend on the technical specifications of a laser machine. Consequently, machine operation parameters are considered the main limitations factor in this process. Practical implications: In this current work, the 4 mm thickness stainless steel (2505) has been used in the experimental investigation to measure the Influence of laser cutting machine parameters. In addition, optimal laser cutting parameter values that minimize the width of kerf width were identified. The optimization problem was formulated and solved by the second-order model method. The laser cutting experiment was planned and conducted according to the (RSM) central composite design approach (uncode). Originality/value: The validation with experimental results shows that the factorial analysis gives an average error 5%, and the (R-sq) is equal to 69.02%. It’s concluded that the model that has the (R-sq) value greater than 41% is considered as a fit model and can be used for the next machining process.

Zastosowanie metod termowizyjnych do określania parametrów laserów technologicznych przy laserowej obróbce cieplnej stali

Depczyński W., Orzechowski T., Przybyłowicz K.

Inżynieria Materiałowa

2003

R. XXIV, nr 6

267-270

Termin termowizja obejmuje metody badawcze, polegające na zdalnej i bezdotykowej ocenie rozkładu temperatury na powierzchni badanego ciała. Metoda ta jest oparta na obserwacji i zapisie rozkładu promieniowania podczerwonego wysyłanego przez każde ciało, którego temperatura jest wyższa od zera bezwzględnego i przekształceniu tego promieniowania na światło widzialne. W rezultacie otrzymuje się obraz czarno-biały lub barwny. W pracy przedstawiono metody badania zjawisk termicznych podczas laserowej obróbki stali za pomocą lasera CO2 z wykorzystaniem termowizji. Przedstawiono opracowaną metodę badania absorpcyjności powierzchni przy laserowym nagrzewaniu stali. Przedstawiono też ciekawsze rozwiązania bezdotykowego pomiaru temperatury podczas obróbek laserowych wykorzystywane w praktyce badawczej.

Thermovision technical term comprises research methods, based on touch-less and remotely controlled temperature distribution on the tested substance surface. The method is based on observation and recording of infrared radiation distribution, emitted by every substance body, which temperature is higher than absolute zero and transformed this radiation into the visible light. On the consequence of above mentioned black and white or coloured picture is being received. In the research there was presented the methods of thermal effects tests during CO2 steel laser heating, using thermovision technique. We've presented also elaborated method of testing a surface absorptivity under the steel laser heating. In addition we've also presented interesting solutions with touch-less temperature measurement during the laser heat treatment used in research practice.