Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Fine Machining of Tool Surfaces

Project Status: finished


Due to the high stresses in cold forging, high speed steels and cemented carbides are often used as tool materials. In many cases, complex tool geometries are hard machined by electrical discharge machining (EDM). The EDM process leads to a thermal influenced layer. For the improvement of surface integrity the so called white layer is usually removed by cost intensive polishing. As finishing methods of ED machined surfaces alternative machining methods can be carried out. In current investigations the fatigue behavior of tools manufactured by the process chains EDM - polishing and EDM - peening are compared within a rotating bending test under laboratory conditions. The results reveal a higher fatigue strength of the peened specimens in contrast to the conventional manufactured ones. This improved fatigue behavior is related to strengthening effects of the top layer.



140902 UBVe

Fatigue strength values of process chains EDM - polishing and EDM - peening

Research Groups



    • Andreas, K.:
      Einsatz des Hochleistungswerkstoffes Hartmetall in der Umformtechnik - Hartmetall als Werkzeugwerkstoff.
      Zeitschrift Konstruktion 5/12(2015), pp. IW5-7


    • Andreas, K.; Merklein, M.:
      Improvement of surface integrity of cold forging tools by adaption of tool making process.
      Prod. Eng. Res. Dev. 8(2014)1-2, pp. 131-141

    • Andreas, K.; Merklein, M.:
      Influence of surface integrity on the tribological performance of cold forging tools.
      Procedia CIRP 13(2014), pp. 61-66

    • Andreas, K.; Kiener, C.; Engel, U.; Merklein, M.:
      Smart FE-Based Tool Design in Cold Forging.
      Advanced Materials Research 1018(2014), pp. 309-316

    • Andreas, K.; Merklein, M.:
      On the tribological influence of coatings in cold forging.
      In: Bouzakis, K.-D.; Bobzin, K.; Denkena, B.; Merklein, M. (Edtrs.): Proc. 11th Int. Conf. THE "A" Coatings in Manufacturing Engineering, 2014, pp. 23-32

    Letztes Update: 09.12.2014