Optimizing the Punch Parameters for V-Bending Stainless Steel Using Response Surface Methodology Approach

Abstract

Bending is a widely employed metal processing technique in manufacturing, presenting various technical challenges during the process, including the estimation of springback and bending load. In this experiment, the authors investigate the springback and bending load responses on two steel plates with different thicknesses to understand how variations in plate thickness impact these mechanical behaviors. The primary objective is to assess the effects of various punch variables on springback and bending load, aiming to optimize their calculation and yield punch values with the least springback and bending loads. This investigation involves sheet plate thicknesses of 1 and 2 millimeters. The testing parameters were defined for each variable, including punch angle (80, 85, and 90 degrees), punch radius (2, 4, and 6 millimeters), and punch travel (18.5, 19, and 19.5 millimeters). In the experiment, Response Surface Methodology (RSM) was employed to analyze punch radius, angle, and travel, in conjunction with the corresponding responses (springback and bending load). The application of RSM aimed to systematically optimize all collected data with the ultimate goal of achieving the lowest possible springback and bending load. Consequently, the determination of springback and bending load relies on the analysis of various punch variables. The test results indicate that punch angle and travel have a more pronounced impact on springback than punch radius, while conversely, punch angle and radius significantly influence the bending load.
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