Vibration welding of thermoplastics. Part II: Analysis of the welding process

1988 ◽  
Vol 28 (11) ◽  
pp. 728-739 ◽  
Author(s):  
V. K. Stokes
Keyword(s):  
Welding Process ◽  
Vibration Welding

scholarly journals Joining of Incompatible Polymer Combinations by Form Fit Using the Vibration Welding Process

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Michael Wolf ◽  
Tobias Kleffel ◽  
Christoph Leisen ◽  
Dietmar Drummer
Keyword(s):  
High Density Polyethylene ◽  
Test Specimen ◽  
Welding Process ◽  
High Potential ◽  
Melting Points ◽  
Polyamide 66 ◽  
Shear Tests ◽  
Polymer Metal ◽  
Close Range ◽  
Vibration Welding

The production of components consisting of various polymer types by welding is severely restricted and only possible for bonding compatible materials with melting points in a close range. Several modifications, such as the cross-linking of one joining partner, allow for circumventing the restrictions regarding the melting points but do not help in joining bonding incompatible materials. Investigations of dissimilar material combinations, especially from polymer-metal hybrid structures, show a high potential of connections based on form fits. Within the scope of this paper, the possibility of joining incompatible polymer combinations, such as polyamide 66 and high-density polyethylene, by micro form fit using the vibration welding process is analyzed. For this purpose, the generated bonding strength of the test specimen was determined by shear tests. Furthermore, the undercuts of the generated prestructures and the resulting bond of the test specimen were examined microscopically by computer-tomography. These investigations depict the high potential of joining incompatible polymer combinations by form fit in the vibration welding using prestructuring to generate undercuts.

Study on the effect of the welding environment on the dynamic recrystallization phenomenon and residual stresses during the friction stir welding process of aluminum alloy

2021 ◽  
pp. 146442072110251
Author(s):  
Mahmoud Abbasi ◽  
Amin Abdollahzadeh ◽  
Behrouz Bagheri ◽  
Ahmad Ostovari Moghaddam ◽  
Farzaneh Sharifi ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Residual Stresses ◽  
Welding Process ◽  
Friction Stir ◽  
Friction Stir Welding Process ◽  
Underwater Friction Stir Welding ◽  
Processed Sample ◽  
Vibration Welding ◽  
Strength And Ductility

Various methods have been proposed to modify the friction stir welding. Friction stir vibration welding and underwater friction stir welding are two variants of this technique. In friction stir vibration welding, the adjoining workpieces are vibrated normal to the joint line while friction stir welding is carried out, while in underwater friction stir welding the friction stir welding process is performed underwater. The effects of these modified versions of friction stir welding on the microstructure and mechanical characteristics of AA6061-T6 aluminum alloy welded joints are analyzed and compared with the joints fabricated by conventional friction stir welding. The results indicate that grain size decreases from about 57 μm for friction stir welding to around 34 μm for friction stir vibration welding and about 23 μm for underwater friction stir welding. The results also confirm the evolution of Mg2Si precipitates during all processes. Friction stir vibration welding and underwater friction stir welding processes can effectively decrease the size and interparticle distance of precipitates. The strength and ductility of underwater friction stir welding and friction stir vibration welding processed samples are higher than those of the friction stir welding processed sample, and the highest strength and ductility are obtained for underwater friction stir welding processed samples. The underwater friction stir welding and friction stir vibration welding processed samples exhibit about 25% and 10% higher tensile strength compared to the friction stir welding processed sample, respectively. The results also indicate that higher compressive residual stresses are developed as underwater friction stir welding and friction stir vibration welding are applied.

Influence of radiation cross-linking of polyamide 66 on the characteristics of the vibration welding process

2015 ◽  
Vol 55 (11) ◽  
pp. 2493-2499 ◽  
Author(s):  
Christoph Leisen ◽  
Markus Menacher ◽  
Dietmar Drummer
Keyword(s):  
Welding Process ◽  
Cross Linking ◽  
Polyamide 66 ◽  
Vibration Welding
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