Bending of Sheet Metal (st37) Using 90 Degree to Estimate Blank Dimensions

Several factors must be considered when designing parts that are being made by bending. The primary factor is minimum radius and angle of bending that can be bent successfully without metal cracking. Low carbon steel metal (st37), manufactured by Libyan Iron and steel Company, was used in this study. Various bending processes by Vee die for different radii and calculate thickness were conducted and bending zones were tested to find the mean radius and calculate the bending allowance. These calculations depend upon the inner bend radius and thickness of the sheet metal. The thickness was reduced and the neutral axis were moved up in the direction of compression side. Form the values of reduction in thickness and different radii of bending a chart was drawn. Another chart was drawn to minimums the process of trial and error for estimating the blank length of the bending sheet metal. Form these charts, the initial blank sizes can be determined, so that products can bend without loss and crack in the material. As a result time and material can be saved. The results of the present study can have practical applications for this material (st37) which is in common use by the