APPLICATION OF THE FUZZY LOGIC METHOD FOR THE COMPENSATION OF ERRORS DETERMINED BY SPRINGBACK IN THE CASE OF HEMISPHERICAL DRAW PARTS MADE FROM METAL SHEETS
Springback of draw parts considerably affects their accuracy and deviations from the theoretical profile, this instability phenomenon determining the following changes of the part shape and geometric parameters: modification of the curvature radius of the part wall, modification of the angle between the flange and the sidewall. The methods applied in order to reduce or eliminate springback are based on tools correction after designing and testing, on the utilization of special tools and devices, on the optimization of process parameters based on some methods that establish a link among springback parameters and the influencing factors of this phenomenon. These methods are expensive and necessitate a big number of experimental tests. Based on these conclusions, it is necessary the development of a method for the reduction or the elimination of the springback from the designing stage.
