EFFECT OF BLANK HOLDER FORCE AND COUNTERFORCE ON WORKPIECE QUALITY IN SHEET METAL EXTRUSION PROCESS BY FINITE ELEMENT METHOD

This research is a study of the effect of blank holder force and counterforce on workpiece quality in the sheet metal extrusion process by finite element computer simulation. The workpieces in finite element simulation were medium carbon steel (AISI: 1045) with a thickness of 10 mm. The simulation model requires that a punch diameter of 12.7 mm, a die diameter of 5 mm, different blank holder force and counterforce with the changing material properties were compared at the depth of 1, 2, 3 and 4 mm respectively. From the results, it was found that the increased blank holder force and counterforce affect a small increase in effective stress and effective strain in workpieces. The results of the study show the influence of the blank holder force and counterforce affected the quality of workpiece in the sheet metal compression process