FALS - Hemming of Light Weight Structures
| Reference number | |
| Coordinator | Swerea IVF AB - Avdelningen för processutveckling |
| Funding from Vinnova | SEK 6 650 000 |
| Project duration | October 2014 - June 2017 |
| Status | Completed |
| Venture | FFI - Sustainable Production |
| Call | 2014-02965-en |
| End-of-project report | 2014-03929sv.pdf(pdf, 966 kB) (In Swedish) |
Important results from the project
The overall objective of the project was to create a stable, reliable and verified concept for the hemming process of lightweight structures in multi materials as well as virtual tools to predict the the sealed joint. Both the parameters of adhesive and hemming parameters have been studied and analyzed in order to also prepare for combinations of materials where cervice and galvanic separation becomes critical.
Expected long term effects
The results of the project have shown that hemming is a useful method for joining lightweight structures but at the same time demonstrated how complex the relation between the hemming, the bead geometry and the adhesive application is and to create a sealed joint. The project has developed the foundation for optimization work through a combination of physical tests that demonstrates behaviors and dependencies and a development of virtual tools that can be used to control the application of adheisve and predict what happens in products with difficult geometric conditions
Approach and implementation
The approach has been to study the impact of the inner structure material, viscosity and rheology of the adhesive, the addition of additives in the adhesive and alternative design solutions to create better locking and optimal hemmed joints, and to further understand the complexity of the area and create good preparation tools