A New Method for Production of Double-Curvature Dome-Shaped Part: Statistical Analysis of the Effects of Process Parameters on the Radius of Curvature of Obtained Dome Shape

摘要

In this work, a new method is proposed for production of double-curvature dome-shaped part. Also, the effects of process parameters on radius of curvature of the obtained dome-shaped part are investigated experimentally. The Taguchi experimental design method is employed to study variousparameters, which significantly affect the amount of radius of curvature in the laser forming of a doubly curved dome-shaped part. The length of irradiating line, number of irradiating lines, laser beam diameter, laser output power, and scanning speed are considered in the evaluations. A L27(35)Taguchi standard orthogonal array is chosen for the design of experiments. The level of importance of the process parameters on the radius of curvature is determined by using analysis of variance. The optimum process parameters combination is obtained by using the analysis of signal-to-noise(S:N) ratios. The variation of radius of curvature of the obtained dome-shaped part with process parameters is mathematically modeled by using the regression analysis method and a closed form equation is derived. The results show the length of irradiating line, number of irradiating lines,laser output power, laser beam diameter, and scanning speed have the most importance effects on the radius of curvature of the obtained dome-shaped part, respectively. Also, it is concluded from results that there is an optimum length for irradiating line that leads to minimum radius of curvatureof obtained dome-shaped part.