Ingenieurwissenschaften und zugeordnete Tätigkeiten
Filtern
Erscheinungsjahr
- 2016 (2) (entfernen)
Dokumenttyp
- Beitrag zu einem Tagungsband (1)
- Vortrag (1)
Sprache
- Englisch (2)
Referierte Publikation
- nein (2)
Schlagworte
- Resistance spot welding (2) (entfernen)
Eingeladener Vortrag
- nein (1)
•Main Welding Technologies in the Automotive: RSW and laserbeam welding
•Light Weight Design leads to increasing use of AHSS and UHSS which results in higher demands for the joining technology
•Joining Multi-Material Structures offers opportunities for “new” Thermal-Mechanical Joining Processes and Hybrid Processes
•In the coming years a trend towards sustainable manufacturing can be seen. Comparison between laserbeam and RSW will be a tight match!
The complex microstructure and the advanced mechanical properties of AHSS steel types lead to an increased susceptibility to weld cracking, especially during resistance spot welding under ‘rough’ manufacturing conditions.
Various activities have been conducted in recent years at the Federal Institute for Materials Research and Testing (BAM) and the Fraunhofer IPK on this matter. Understandings about the safe spot weldability and the process of crack-forming itself were gained, and solutions for handling this issue given.
The performed work includes investigations on the influence of initial gaps as well as restraint intensity. An experimental method for the determination of the general cracking susceptibility, i.e. a material ranking of AHSS in respective to current restraints was developed. Coupled mechanical and thermal simulations of the welding process show the present internal stress-strain-conditions and values responsible for the formation of cracks, deepening the understanding of the process.
By using this easy to perform and material-independent method for the determination of the cracking susceptibility in resistance spot welded joints, small and medium sized companies can profit by rapidly evaluating the joinability of their handled material combinations as well as OEMs.