Analysis of the influence of tribological properties on the deep drawing process of sheet metals after passing a drawbead

Funding period:

Start: 1. November 2018
Ende: 31. July 2021

Abstract

The project EFB 05 217 / AiF 20015N is dealing with the tribological system in a drawbead passage.

Recent studies (also provided in the project EFB 08/114) have shown that material properties change significantly after a drawbead. This can lead to a shift in process limits what is also due to the influence of tribological properties. During the preloading in a drawbead, visible changes in the surface itself area a result of higher surface pressures in occurring in the drawbead. These effects, such as a recognizable surface modification, are mostly unexplored at the moment.
The goal of this project is the fundamental analysis of the effects of drawbeads on the tribological processes and to improve the understanding of the use and operation of drawbeads for industrial use. These investigations are associated with micro- and macroscopic characterizations before and after passing a drawbead. The drawbead is chosen by industrial standards and all experiments are conducted at the Institute of Manufacturing Technology.

Shorter development cycles are a major challenge for small and medium size companies. Results of these experiments are expected to improve the numerical interpretation and will lead to cost savings, time advantages and therefore to competitive advantages. For the cost-effective fulfillment of various tasks in the forming technology, the virtual process design is suitable. Wrong simulations can lead to misconstructions. The results will be validated by the transfer to a deep-drawing process with drawbead in real size part. The participation of well-known companies in the project committee (PbA) is ensuring a practical benefit.

Tribological analysis after a drawbead passage

Research groups

• Materials Characterization and Modeling

Publications