Sheet Metal Bending’s Spring Back Effect
Sheet Metal Bending’s Spring Back Effect
George John Panicker, Michel Darwin, Vishweswaran, and Vinayagamoorthi M A, Assistant Professor, Department of Mechanical Engineering, Kumaraguru College of Technology, India investigate how parameters—such as thickness, length, die and punch radius, and cut cross sections near the bend area—affect the spring back effect in the v bending air bending process.
Introduction
Sheet metal is one of the most important domains in mechanical engineering. Sheet metal forming processes are comparatively easier than other manufacturing processes. The most common operation done on sheet metal is bending. Bending causes a change in stress of the material, as one side of the bent part experiences compressive stress, while the other experiences tensile stress. A common effect of these stresses is spring back — where the metal sheet tries to regain its original position after bending. There are two major factors that affect the spring back reaction; material type and sheet thickness.
Analysing and controlling the spring back reaction is key to this industry for sheet metal forming precision as sheet metal is widely used everywhere. Industries like aerospace, automobile, and pipelines are large consumers of sheet metal and these industries demand precise products or it could lead to catastrophic failures.
