Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Load-oriented cold forging tools by local optimised tool surfaces



Datum: 06.12.2011


Author


Reporter

  • Prof. Dr.-Ing. habil. Marion Merklein
  • Prof. Dr.-Ing. Michael Schmidt

The scope of this work was the research of maximumstressed cold forging tools, where fatigue due to high cyclic tool loads as well as wear due to a distinct material flow arise and lead to an early tool failure. Therefore three different treatments were selected: Hard Roller Burnishing, the established Heat Treatment by Laser as well as Laser Texturing for the improvement of the tribology and wear resistance. On the basis of basic studies the effective applicability of the surface treatment procedures at high-strength materials in cold forging was proven. It was examined in which way the treatments affect the surface properties of the high-strength tool materials. With this knowledge suitable parameters were determined for a selective and local surface treatment, which were transfered to cold forging example tools and were successfully used in serial production. The tool surfaces were adapted by selective and local surface treatment to the demand during the forging process and thus the tool life was increased considerably.