Leibniz Universität Hannover Faculty Faculty of Mechanical Engineering
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Institute of Forming Technology and Machines
 
Institute for Forming Technology and Forming Machines Research Beendete Projekte
  • ERProFit - Energy and resource efficient production - Low-oxygen forging through retrofitting existing forging systems
    The focus of the project is to prevent scale formation in the process of hot forging by taking place in a low-oxygen atmosphere, which prevents oxidation of the workpiece surface. This results in enormous potential for CO2 savings along the entire value chain, as no unnecessary loss of material occurs due to the lack of scale. Furthermore, natural resources are conserved through the more efficient use of raw materials.
    Year: 2021
    Funding: BMWi - Bundesministeriums für Wirtschaft und Energie
  • Use of additively manufactured forging dies with contour-adapted internal cooling
    Forging dies are subjected to high stress, which leads to wear and reduced tool life. The thermal tool load is essentially due to the contact of the forging die with the heated parts. As part of this research project, complex internal cooling channels are introduced into forging dies using additive manufacturing processes in order to temper them from the inside and counteract thermal tool damage.
    Year: 2020
    Funding: Förderung: Forschungsvereinigung der Arbeitsgemeinschaft der Eisen und Metall verarbeitenden Industrie e.V. (AVIF) – Fördernummer AVIF A 318
  • Form-fit in-mould connection between FRP and a sheet metal insert structured with friction drilled bushings
    The aim of this research project is to develop a form-fit connection between a fibre-plastic composite and a metal insert structured with friction-drilled bushings. Thus, components can be produced by hybrid injection moulding processes that provide a multiaxial loadable material bond and a higher bond strength than conventional through-injection points.
    Year: 2020
    Funding: European Research Association for Sheet Metal Processing e.V. (EFB) and Industrielle Gemeinschaftsforschung (IGF) - Project number 20711N
  • Improved failure characterisation of high-strength steel sheet materials using a new test methodology for shear tensile tests in uniaxial tensile testing machines
    The project aims to develop a new test methodology that will allow improved characterisation of stress-based damage models for high-strength steels. The methodology is based on an inline adjustment of the loading direction to ensure homogeneous stress conditions. Increased accuracy of stress-based damage models and thus realistic process modelling allow full usage of the forming potential of high-strength steel sheet materials.
    Year: 2019
    Funding: German Research Foundation (DFG)- Project number 405334714
  • Fundamental investigations of gradient-dependent nitrided forging tools in hot forging under cyclic thermomechanical loads
    In the field of hot foging, the forging tool components are subject to a complex load collective. This is composed of mechanical, tribological, thermal and chemical stress components. Within the scope of the project, therefore, a modelling technique for the numerical wear calculation of nitrided and heat-treated forging tools is to be elaborated.
    Year: 2019
    Funding: DFG BE 1691/229-1
  • Dry lubrication of rolling contacts by self-regenerative molybdenum oxide coating systems
    The aim of the project is to develop a solid lubricant system based on molybdenum, which is characterised in particular by its self-regenerative lubricating layer. The initial focus will be on characterisation and development of the coating system. Subsequently, the wear behaviour will be determined by life tests and transferred to a FE model.
    Year: 2019
    Funding: German Research Foundation (DFG) - SPP 2074 TP2 - Project number 407673224
  • Collaborative Research Centre 1153 "Process chain for the manufacture of hybrid high-performance components by tailored forming"
    The aim in the second funding period is to further improve the hybrid extrusion process that has been developed. For this purpose, asymmetric profiles made of aluminium and steel are extruded, where the bond strength is particularly challenging. The process knowledge from the coaxial composite extrusion process will be transferred to a new material pairing, titanium and aluminium, to increase the lightweight potential.
    Year: 2019
    Funding: German Research Foundation (DFG) - SFB 1153 TP A1 - Project number 252662854
  • Experimental and numerical modelling and analysis of microstructural residual stresses in hot-formed components with targeted cooling
    The challenge of this exciting project is in the simulation of the complex physical processes in hot-formed components before, during and after forming. A large number of process parameters and state data must be taken into account because mechanical, thermal as well as metallurgical variables influence the residual stress state of the final part. The aim is the targeted adjustment and process-technical utilisation of residual stresses for improved performance to enhance the product life cycle properties.
    Year: 2019
    Funding: German Research Foundation (DFG) - Project number 374871564

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