Joining Technology

Force controlled friction stir welding of a bended aeroplane fuselage part with a Tricept 805 robot

Light-weight materials - depending on their component design - require novel joining technologies. Innovative components furthermore require "Local Engineering" to provide optimum joint properties and damage tolerant performance. Development and implementation of the local engineering principles for fabrication and design of highly complex hybrid joints of multi-material components require a thorough understanding of the joint properties and role of each weld constituent. Hence, a wide range of expertise of "Local Engineering" covering weldability of light-weight materials, their metallurgy, joint design and understanding of the local and global properties are R&D themes of this research area. Fundamental aspects are addressed, related to technological and material characteristics of the joining process, to provide novel solutions for mono-material and hybrid components with optimised properties. In these multi-material components, it is essential to join light-weight metallic materials in mono- and multi-material joint types with multi-material design principles.

Laser Welding Set-up

Joining of similar and dissimilar metallic materials such as different types of Al-alloys, Mg-Al, Al-Polymer, Ti-Polymer, Al-Ti, Mg-Fe combinations shall be performed by using Nd:YAG laser beam welding as well as friction based joining technologies. Moreover, the dual laser beam welding (DLBW) shall be utilized for T-joint configuration to reduce the porosity, and to produce metallic hybrid welds.

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