Versatile joining with additional fastener

Funding period:

Start: 1. July 2019
Ende: 30. June 2027

Abstract

Due to increasing economic and ecological requirements, the trend towards lightweight construction has become increasingly important in recent years. A central aspect of this development are multi material designs combining high-strength steels and aluminum components with increased complexity and a high number of variations. For the assembly and connection of components made of different materials, joining processes are necessary that enable the joining of workpieces with varying mechanical and geometrical properties. One approach is the use of the forming and pre-hole-free joining process with self piercing rivets, which is characterized by high resource and process efficiency. However, due to the increasing demands on joining technology in regard to materials and geometries, new processes and methods for the production of versatile and tailored joints are necessary.
The aim of the project is the development of a versatile self piercing riveting process which is robust against deviations and process variations. Therefore, two possible solution strategies are pursued, which complement each other synergetically. The first approach contains the description of an adaptive, linear process control for the investigation of the transformability of used additional joining parts. This part of the project is being worked on by the project partner at the LWF in Paderborn (https://mb.uni-paderborn.de/lwf). The second solution strategy, which is pursued at the LFT, includes the adaptation of the tool kinematics to the joining process and a versatile in situ control of the process parameters. An orbital forming process is used which is adapted to the joining materials and geometries with regard to orbital forming kinematics and process control, thus enabling tailored joints with increased process robustness.

Research groups

• Manufacturing Processes

Publications