Estampagem incremental em chapa de aço inoxidável aisi 304 utilizando ferramentas esféricas com a peça submersa em lubrificante mineral integral com aditivos de extrema pressão

Abstract

The present work aims to know the behavior of austenitic stainless steel AISI 304 during the ISF process (Incremental Sheet Forming). The study was based on the following parameters: variation of tool rotation and variation of the lubricating fluid. The tests are based on the ISF variant called Single Point Incremental Forming (SPIF). Basically, the structure employed was a device for fixing the plate, a CNC machining center and a CAD/CAM software. Five rotational test were performed: 0 rpm (stationary tool), 500 rpm, 1000 rpm, 2000 rpm and a 500 rpm test with the addition of mech graphite (40μm) in 10% by weight solution. The best shaped surface finish measured by the mean roughness Ra and Rz was reached in the test in which the tool is stationary. After the conformation, the specimens had different stamping depths as a result of the recrystallization and growth of new grains resulting from the long test period and the heat generated during the process. Also, tensile tests were carried out in order to show some properties of AISI 304 stainless steel.