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Dive into the research topics where Benjamin Lossen is active.

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Featured researches published by Benjamin Lossen.


ESAFORM 2016: Proceedings of the 19th International ESAFORM Conference on Material Forming | 2016

Friction spinning – Twist phenomena and the capability of influencing them

Benjamin Lossen; Werner Homberg

The friction spinning process can be allocated to the incremental forming techniques. The process consists of process elements from both metal spinning and friction welding. The selective combination of process elements from these two processes results in the integration of friction sub-processes in a spinning process. This implies self-induced heat generation with the possibility of manufacturing functionally graded parts from tube and sheets. Compared with conventional spinning processes, this in-process heat treatment permits the extension of existing forming limits and also the production of more complex geometries. Furthermore, the defined adjustment of part properties like strength, grain size/orientation and surface conditions can be achieved through the appropriate process parameter settings and consequently by setting a specific temperature profile in combination with the degree of deformation. The results presented from tube forming start with an investigation into the resulting twist phenomena ...


Archive | 2015

Friction-Spinning – Innovative Opportunity for Overcoming Process Limits in Spinning Processes

Werner Homberg; Benjamin Lossen

Normally, work-hardening effects limit the deformation that can be attained during cold working processes like spinning. By integrating self-induced heat generation (based on deliberately added friction processes) more complex forming operations become possible. This in-process heat treatment thus makes it feasible to dramatically extend the existing forming limits and produce more complex geometries, as well as favorable part properties (e.g. microstructure) from a wide variety of alloys. It is then possible to use semi-finished parts like sheet metal blanks, profiles, tubes and also solids for friction spinning.


Key Engineering Materials | 2015

Friction-Spinning - Influence of Tool and Machine Parameters on the Surface Texture

Benjamin Lossen; Werner Homberg

The incremental forming process of “friction-spinning” is suited to the manufacture of functionally graded workpieces made from tubes and sheets with the defined adjustment of material properties. The innovative feature of this new process is the use of process elements from both metal spinning and friction welding. As the workpieces are being processed, friction sub-processes are employed to achieve self-induced heat generation. Compared with conventional spinning processes, this in-process heat treatment permits the extension of existing forming limits and allows more complex geometries to be achieved, together with defined, favorable part properties. These properties, like strength, grain size or surface conditions, can be influenced by the set of specific temperature profiles that prevail during the manufacturing process in combination with the degree of deformation. The temperature profiles can be adjusted by selecting appropriate process and tool parameters in a defined manner. This paper presents the influence of the aforementioned parameters on the surface texture. The results presented start with the analysis of the surface texture development. Following this, the effects of the significant process parameters and tool geometries that give rise to the typical structure and hardness are explained.


Key Engineering Materials | 2013

Friction-Spinning – an Innovative Incremental Forming Process for the Manufacturing of Functional Graded Parts

Werner Homberg; Benjamin Lossen; A. Struwe

Friction spinning is an innovative incremental forming process for the manufacture of tailor-made components with defined functionally graded properties. The process is characterized by the use of friction sub-processes for self-induced heat generation that can be employed for the defined thermo-mechanical treatment. Due to this in-process heat treatment, it is possible to extend the forming limits and achieve more complex geometries as well as favorable part properties. One very interesting application for friction spinning is the sealing of tube ends. There are a lot of conceivable application fields, including the substitution of soldering or welding operations in chemical engineering. Another interesting field is the use of this incremental forming process for industrial or automotive applications such as the manufacture of very slim cylindrical cups. An advantage of this method is the feasibility of defined control of the thickness distribution in the bottom and side wall area. This is supported by a new tool system with a pivoting forming tool. The pivot movement is controlled by a process control system. This system makes it possible to achieve different contact conditions between the tool and the workpiece during the process so as to attain a defined influence on the material flow and hence to enhance the attainable bottom wall thickness compared with previous fixed-angle tools. This tool concept thus offers an opportunity to improve the properties of the components as well as to manufacture new and complex geometries, such as hollow, fully closed roll type parts.


Procedia Engineering | 2014

Friction-spinning – Interesting Approach to Manufacture of Complex Sheet Metal Parts and Tubes☆

Benjamin Lossen; Werner Homberg


The International Journal of Advanced Manufacturing Technology | 2014

Analysis of the surface roughness obtained in a friction spinning process based on empirical models

Stefan Hess; Benjamin Lossen; Dirk Biermann; Werner Homberg; Tobias Wagner


Archive | 2018

Ressourceneffizienz am Beispiel des Reibdrückens Nicht nur aus technologischer Sicht eine Herausforderung

Benjamin Lossen; Werner Homberg


Journal of Materials Processing Technology | 2018

Friction-spinning—Grain structure modification and the impact on stress/strain behaviour

Benjamin Lossen; Anatolii Andreiev; Mykhailo Stolbchenko; Werner Homberg; Mirko Schaper


Procedia Engineering | 2017

Friction-Spinning – Possibility of Grain Structure Adjustment

Benjamin Lossen; Anatolii Andreiev; Werner Homberg; Mirko Schaper


Procedia Materials Science | 2014

Fatigue Crack Extension in an Incrementally Formed Tube

Tobias Stein; Angelika Brueckner-Foit; Benjamin Lossen; Werner Homberg

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A. Struwe

University of Paderborn

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Dirk Biermann

Technical University of Dortmund

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Stefan Hess

Technical University of Dortmund

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Tobias Wagner

Technical University of Dortmund

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