SPRING-BACK ANALYSIS OF THE VEE BENDING PROCESS FOR HIGH-STRENGTH STAINLESS STEEL

• Main Authors: Abdulah, A. (Author), Khoirudin (Author), Rahdiana, N. (Author), Shieddieque, A.D (Author), Sukarman (Author)
• Format: Article
• Language: English
• Published: Penerbit UTM Press 2023
• Subjects: Bending angle; high-strength SUS 304; Hydraulic press bending machine; Metal forming; Spring-back factor; V-dies punches radius
• Online Access: View Fulltext in Publisher

 This study discussed the evaluation of bending process using high-strength SUS 304 (HS-SUS-304) material of high degree tolerances, and its application in a safe, strongbox, and strongroom protection system. This bending process is one of the several material-forming techniques widely used in the manufacturing industry. Moreover, incorrectly selected parameters such as the V-die punch radius, the angle of V-die bending, and the angle of machine parameters often leads to material failure and wrong final dimensions. The V-bending process was chosen for evaluation because it exhibits significant spring-back effect and has a wide range of industrial applications. The experimental method utilized HS-SUS 304 with a thickness of 3.0 mm that meets the ASTM A-240 requirement, and the input parameters used for V-die angle as well as tip punch radius were chosen in order to achieve the 90° ± 0.5o, and 50° ± 0.5° degrees of the workpieces. The V-die angle of 89° was selected with a tip punch radius of 1.0 mm and 1.2 mm. Furthermore, the spring-back effect was analyzed and evaluated to meet the standard angle requirement, and the results showed that the settings on the bending machine need to be adjusted to achieve angles within tolerances of degrees. It was observed that when the process bend angles on the machine was set at 93.75° and 52.83° with 1.0 mm V-dies tip punch radius, the spring-back factor results produce an average of 0.9609, 0.9618, and 0.9600. Meanwhile, this average increased to 0.9634, 0.9641, and 0.9655, respectively by using 1.2 mm. © 2023 Penerbit UTM Press. All rights reserved.