Herrmann, M.

Lade...
Vorschaubild
Preferred name
Herrmann, M.
Official Name
Herrmann, M.

Einstellungen

Gerade angezeigt 1 - 2 von 2
  • Lade...
    Vorschaubild
    Some of the metrics are blocked by your 
    consent settings
    Item-typ:Veröffentlichung,
    Dry Rotary Swaging
    (2015)
    Herrmann, M.
    ;
    Vollertsen, Frank
    ;
    Hasselbruch, H.
    ;
    Böhmermann, F.
    ;
    Kuhfuss, B.
    Rotary swaging is an incremental cold forming process for rods and tubes and has a wide spread use in the automotive industry for the manufacture of axles or steering spindles. The advantage of rotary swaging is the optimal use of work piece material resources, due to material strengthening and the ability to manufacture hollow parts with variable wall thicknesses. The established processes use lubricants which fulfil necessary functions such as cooling, washing abrasive particles out of the forming zone and to provide an adequate work piece surface quality. Both, under economic and ecological aspects, the development of rotary swaging towards a dry process layout is highly innovative. To avoid ex-tensive lubrication it is necessary to substitute the above mentioned functions of the lubricant by new innovative ap-proaches. This work shows an interdisciplinary approach for dry rotary swaging, at first a FE modelling and simulation of the rotary swaging process for understanding and designing a dry process. Furthermore, coated tools are presented for the reduction of abrasive and adhesive wear of the tool and structured tools for the control of friction and process forces. At last the combination of both tool modifications is demonstrated.
    Wissenschaftlicher Artikel
      471  128
  • Lade...
    Vorschaubild
    Some of the metrics are blocked by your 
    consent settings
    Item-typ:Veröffentlichung,
    Potentials of Dry Rotary Swaging
    (2015)
    Herrmann, M.
    ;
    Hasselbruch, H.
    ;
    Böhmermann, F.
    ;
    Kuhfuss, B.
    ;
    Zoch, H.W.
    Rotary swaging is an incremental cold forming process for the manufacture of cylindrical light weight components such as axles and steering spindles and has a wide spread use in the automotive industry. The advantage of rotary swaging is the optimal use of work piece material resources. This is due to material strengthening through strain hardening and the ability to manufacture hollow parts with variable wall thicknesses. However, main drawback is the need for an extensive lubrication to control tool wear, to discharge abrasive particles from the forming zone, and to provide adequate work piece surface quality. The subsequent, inevitable cleaning of the work pieces after manufacture leads to a significant increase of costs per unit. Thus, the development of rotary swaging towards a dry process layout is highly innovative both under economic and ecological aspects. The omission of lubricant provokes fundamentally changed tribological conditions in tool-work piece contact, leading to changes in process forces, increased abrasive and adhesive tool wear and reduced work piece quality. A robust, lubricant free rotary swaging, offering the same product quality as a conventional rotary swaging process with the use of lubricant, therefore implies the control of the modified tribological properties by methodologies substituting the tasks of the lubricant. This work shows an interdisciplinary approach for the development of dry rotary swaging, that comprises the FE modeling and simulation of the rotary swaging process for general process understanding and designing; the micro structuring of the rotary swaging tool surfaces for control of friction and process forces; and the development of tungsten doped a-C:H tool hard coatings for the reduction of abrasive and adhesive wear of the tools.
    Wissenschaftlicher Artikel
    Band:1
      494  206