부산대학교 도서관

The aim of this paper is to develop a mathematical model using a linear regression analysis for the laser cut perpendicularity depending on the cutting parameters and to compare the values of the cut perpendicularity according to ISO 9013:2002 (E) standard. Cutting parameters that are used as independent variables in this research are: laser power P, cutting speed v and assist gas pressure p. During the experiment 75 samples of 1.4307 DIN stainless steel and 1 mm of thickness were cut on HSG fiber laser using nitrogen [N.sub.2] as an assist gas. Each sample was cut using different combination of values of independent variables. Cut perpendicularity was measured on these samples with total of 225 measurements. obtained results show that the cutting speed is only significant variable in the model and that the linear regression analysis is suitable for the analysis of the cut perpendicularity. Every experimental value of the cut perpendicularity is located in the first quality category according to ISO 9013:2002 (E) standard. Keywords: laser cutting; fiber laser; regression analysis; cut perpendicularity; stainless steel
1. Introduction Multiple regression analysis is shown to be useful technique for mathematical modeling of many industrial engineering processes including material cutting process. These processes happen as result of interaction [...]