Project of forming tests of various heights brake ribs from various sheet-metal thicknesses

Abstract

The article deals with the forming of brake ribs of diffrent heights from various sheet-metal thicknesses to evaluate the required force with which the required holding force will be in correlation in the actual tool, thereby avoiding non-stamping of break ribs when clamping the blank holder at the start of the drawing process in practice. Four suitable metal sheets representing a wide range of used materials were selected for covering most of the problems associated with braking ribs in the automotive industry. Then four thicknesses worked with the most in practice were selected for these materials. After defining the tools and their scope of use together with working pressures and output, the most suitable dimensions of blank specimens for braking rib stamping were defined so as to have a sufficient reserve when testing samples in a real process, should the actual pressures and forces differ from those calculated in simulations. Then the article discusses simulations of the respective stamping process by means of the software AutoForm 4.06, using the finite element method to correspond to actual stamping conditions.