Optimization of the punch parameters in the V-bending process of stainless steel for bending load and spring back using response surface methodology.

Bending of sheet metal bending is widely used to operate in sheet metal. The bending operation raises some technical matters in production, such as the prediction of spring back and bending load. In this paper, the values of the spring back and bending load (force) are investigated for stainless steel sheet metal. This study aims to investigate the effect of punch parameters on spring back and bending forces, and to optimize the process parameters that are carried out to obtain punch parameters that produce minimum spring back and small bending forces. The two sheet metal thicknesses (1 and 2 mm) were applied. The experimental parameters were performed variable punch angle (i.e. 80o, 85o, and 90o), variable punch radius (i.e. 2 mm, 4 mm, and 6 mm), and variable punch travel (i.e. 18.5, 19, and 19.5). The Response Surface Methodology (RSM) was used to analyze the input process (punch radius, punch angle, and punch travel) and the responses (i.e. spring back and bending load/forces). The result of this study can determine the resulting spring back and bending load based on punch parameters. it can be concluded that spring back is significantly affected by punch angle and punch travel than punch radius. While the bending load is influenced by the punch angle and punch radius. Furthermore, the RSM was optimizing the all data to obtain the minimum spring back and bending force. [ABSTRACT FROM AUTHOR]