David Römisch
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View article: Tailored material flow in pin-extrusion of sheet metal under varying material and geometric conditions for enhanced joining technology applications
Tailored material flow in pin-extrusion of sheet metal under varying material and geometric conditions for enhanced joining technology applications Open
Pin structures extruded from the sheet metal plane have numerous industrial applications. For instance, they can be used in bulk microforming to solve handling difficulties or in joining technology to connect dissimilar materials to overco…
View article: Investigation on the limp properties of formed foils for hydrogen applications
Investigation on the limp properties of formed foils for hydrogen applications Open
The mass production of bipolar plates for electrolyzers and fuel cells is a central step towards the realization of efficient and cost-effective energy systems of the future. However, current production processes are reaching their limits …
View article: Alternating Additive Manufacturing and Forming—An Innovative Manufacturing Approach
Alternating Additive Manufacturing and Forming—An Innovative Manufacturing Approach Open
In this work, an innovative manufacturing approach that includes a fully linked and integrated manufacturing system consisting of a laser-based directed energy deposition (DED-LB/M) module and a forming press is presented. The alternating …
View article: Investigation on pin caulking as a versatile joining process
Investigation on pin caulking as a versatile joining process Open
Lightweight design is increasingly used to combine the specific advantages of various dissimilar materials into multi-material systems. The aim is to make production more resource-efficient and reduce emissions. However, one challenge in t…
View article: Mechanical joining of high-strength multi-material systems − trends and innovations
Mechanical joining of high-strength multi-material systems − trends and innovations Open
In conjunction with mechanical joining processes. Mechanical joining processes play a key role for the realization of multi-material lightweight structures, which are essential with regard to environmental protection. However, joining of d…
View article: Warmforming Flow Pressing Characteristics of Continuous Fibre Reinforced Thermoplastic Composites
Warmforming Flow Pressing Characteristics of Continuous Fibre Reinforced Thermoplastic Composites Open
The paper presents research regarding a thermally supported multi-material clinching process (hotclinching) for metal and thermoplastic composite (TPC) sheets: an experimental approach to investigate the flow pressing phenomena during join…
View article: Pin Extrusion for Mechanical Joining from Orbital Formed Tailored Blanks with Local Material Pre-Distribution
Pin Extrusion for Mechanical Joining from Orbital Formed Tailored Blanks with Local Material Pre-Distribution Open
Pin extrusion is a common process to realise pin structures in different geometrical dimensions for a subsequent joining operation. Nevertheless, the process of pin extrusion offers process limits regarding sheet thinning as a consequence …
View article: Robustness Analysis of Pin Joining
Robustness Analysis of Pin Joining Open
The trend towards lightweight design, driven by increasingly stringent emission targets, poses challenges to conventional joining processes due to the different mechanical properties of the joining partners used to manufacture multi-materi…
View article: Joining of CFRT/Steel Hybrid Parts via Direct Pressing of Cold Formed Non-Rotational Symmetric Pin Structures
Joining of CFRT/Steel Hybrid Parts via Direct Pressing of Cold Formed Non-Rotational Symmetric Pin Structures Open
In this study, quasi-unidirectional continuous fiber reinforced thermoplastics (CFRTs) are joined with metal sheets via cold formed cylindrical, elliptical and polygonal pin structures which are directly pressed into the CFRT component aft…
View article: Clinching of Aluminum Materials – Methods for the Continuous Characterization of Process, Microstructure and Properties
Clinching of Aluminum Materials – Methods for the Continuous Characterization of Process, Microstructure and Properties Open
Clinching as a mechanical joining technique allows a fast and reliable joining of metal sheets in large-scale production. An efficient design and dimensioning of clinched joints requires a holistic understanding of the material, the joinin…
View article: Data-driven analysis of cold-formed pin structure characteristics in the context of versatile joining processes
Data-driven analysis of cold-formed pin structure characteristics in the context of versatile joining processes Open
Due to increasingly strict emission targets and regulatory requirements, especially for companies in the transport industry, the demand for multi-material-systems is continuously rising in order to lower energy consumption. In this context…
View article: Experimental Study on Joining by Forming of HCT590X + Z and EN-AW 6014 Sheets Using Cold Extruded Pin Structures
Experimental Study on Joining by Forming of HCT590X + Z and EN-AW 6014 Sheets Using Cold Extruded Pin Structures Open
Due to stricter emission targets in the mobility sector and the resulting trend towards lightweight construction in order to reduce weight and consequently emissions, multi-material systems that allow a material to be placed in the right q…