Adaption of tool surface for sheet-bulk metal forming by means of pressurized air wet abrasive jet machining

Freiburg, D.1, a; Aßmuth, R.1, b; Garcia Carballo1; Biermann, D.1, c; Henneberg, J.2; Merklein, M.2, d

1)
Institute of Machining Technology, TU Dortmund University, Baroper Str. 303, D-44227 Dortmund, Germany
2)
Institute of Manufacturing Technology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 13, 91058, Erlangen, Germany

a) freiburg@isf.de; b) assmuth@isf.de; c) biermann@isf.de; d) Marion.Merklein@fau.de

Abstract

Surface structures are used for several applications in industry to enhance the characteristics of surfaces and therefore processes. One example is the Sheet-bulk metal forming process which combines the advantages of bulk and sheet metal forming. Due to the complex material flow and load, the tool surfaces do need adapted tribological properties. High feed milled surface structures have been used in the past to control the material flow of the sheets. But due the high stresses appearing, the surfaces show a running-in behavior which altereds the tribological conditions. Within this study, a pressurized air wet abrasive jet machining (PAWAJM) process is used for adapting the high feed milled surface in order to manipulate the tribological conditions. Therefore, the surfaces characteristics, residual stresses as well as the tribological effects were investigated. It is shown that the PAWAJM process can be used to modify the surface characteristics and thus the friction of the surface. In addition, it can be seen that residual compressive stresses are applied during the PAWAJM.

Keywords

Surface modification, Tribology, Sheet-bulk metal forming

Publication

Production Engineering, (2018), doi: 10.1007/s11740-018-0858-4