Joining by using pin-like structures in welding processes
Final Report Abstract
Sustainable and resource-saving production is taking on an increasingly important role. Due to their efficient material utilization, multi-material designs are suitable in particular here, although they pose major challenges for conventional joining processes. Therefore, the project investigated the joining using pin-like structures in welding processes that represents an innovative approach for combining adhesion-incompatible polymers. The fundamental research of the two process steps (structuring and joining) by using vibration as well as ultrasonic welding technology allowed the identification of the correlations between material, process and joint properties. By the gained process understanding, in combination with a comprehensive material and component analysis, general design and process recommendations have been derived. As a result, high bond strengths were achieved for adhesion-incompatible combinations between two semi-crystalline as well as between semi-crystalline and amorphous thermoplastics. These were already above conventional adhesive bonds for the best process control. In addition to the establishment of two process routes for adhesion-incompatible polymer combinations (generation of the undercut in the structuring step and by deformation in the joining step), a fiber course modification could also be realized by the use of pin structures. However, it was not possible to maintain this in the joint up to now.
Publications
-
Influence of the Structuring-Tool Geometry on Form-Fit Joining by Use of Pin-Like Structures in Vibration Welding. Procedia Manufacturing, 47, 375-382.
Wolf, Michael & Drummer, Dietmar
-
Design criteria for the pin-foot ratio for joining adhesion-incompatible polymers using pin-like structures in vibration welding process. Journal of Polymer Engineering, 41(10), 873-882.
Wolf, Michael & Drummer, Dietmar
-
Filling Behavior in Joining Using Pin-like Structures. Polymers, 14(15), 3083.
Wolf, Michael & Drummer, Dietmar
-
Separation of Multi-Material Polymer Combinations Produced by Joining Using Pin-like Structures. Journal of Manufacturing and Materials Processing, 6(1), 13.
Wolf, Michael & Drummer, Dietmar
-
Structure formation in pin-like joining using vibration welding technology. Journal of Advanced Joining Processes, 8, 100158.
Wolf, Michael & Drummer, Dietmar
-
Structuring step dependent characteristics in joining using pin-like structures in the vibration welding process. International Polymer Processing, 39(2), 152-161.
Wolf, Michael & Drummer, Dietmar
-
Verformung pinartiger Strukturen im Fügeprozess zur Erzeugung formschlüssiger Multi-Material Verbindungen. Joining Plastic – Fügen von Kunststoffen 17 (2023), No. 3-4, S. 174-181.
Wolf, M. & Drummer, D.
