Univ. Prof. Dr. Ing.

Bergs, Thomas

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  • Publication
    Evaluation of the influence of different milling parameters and tool wear on the rim zone of a 5-axis milled large gear
    ( 2022)
    Zachert, Christoph
    ;
    Greschert, René
    ;
    Schraknepper, Daniel
    ;
    Brimmers, Jens
    ;
    Bergs, Thomas
    Machining of gears by 5-axis milling allows additional degrees of freedom in gear design compared to conventional hobbing processes. Changes in the machining technology influence the surface integrity and, thus, the service life of the machined gears. For this reason, different machining parameters were investigated regarding their effects on the surface layer and subsequently on service life. In this paper, the residual stresses and microstructures of a large gear manufactured by 5-axis milling and the service life of test gears are analyzed. With the results from this paper, the surface integrity and service life can be predicted depending on the machining parameters.
  • Publication
    Analysis of tool wear in face hobbing plunging manufacturing processes
    ( 2022)
    Alexopoulos, Charalampos
    ;
    Brimmers, Jens
    ;
    Bergs, Thomas
    For soft machining of bevel gears, multi-part tool systems consisting of a cutter head and stick blades are commonly used. In the past, experimental investigations regarding the tool wear in bevel gear milling have been carried out, aiming to optimize the process design and thus the process economic efficiency. However, the existing investigations refer only to face milling processes. In this paper, a tool wear study for an industrial application of the face hobbing plunging process is presented. Additionally an analogy trial of the process is designed. Based on the findings, it is concluded that the designed analogy trial is suitable for analyzing the tool wear development for face hobbing plunging processes.