| Titre : |
The way to the perfect hem flange bond |
| Type de document : |
texte imprimé |
| Auteurs : |
Udo Mößner, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 24-27 |
| Langues : |
Multilingue (mul) |
| Catégories : |
Adhésifs -- Application-dosage
Adhésifs dans les automobiles
Assemblages collés
Automobiles -- Carrosseries
|
| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
Hem flange bonding is one of the most demandingjoining processes in car body construction, as the hem area is particularly susceptible to corrosion. The challenges for car manufacturers lies in the complex geometries of the car parts, the optimas filling of the hem area, avoiding the creation of any air channels which may lead to corrosion and in achieving a clean, sharp-edged application. |
| Note de contenu : |
- Hem flange bonding process
- Adhesive is applied manually or automatically
- Swirl application particularly suitable
- Uniform distribution of the adhesive
- Typical errors and their causes
- Automatic in-line quality assurance with visual inspection
- Fig. 1 : Motor and trunk lids are typical mounted parts that are folded and bonded during the production process
- Fig. 2 : Nesting : The inner plate is nested with the outer plate to which adhesive has already been applied. Plane-parallel nesting ensures an optimal result - Hemming : Mechanical forming using various processes that give hem its final shape - Final hem : The adhesive is completely compressed. An optimally filled hem without air pockets prevents corrosion
- Fig. 3 : The long-term stability of this hem flange bond depends on the distribution of the adhesive in the hem. There are four relevant criteria for this
- Fig. 4 : Roller hem bonding : first step by means of a pre-folding roller. The process achieves a high surface quality, especially for complex component geometries
- Fig. 5 : Roller hem bonding : second step with the finishing roller
- Fig. 6 : Types of application : traditional bead application, swirl application and swirl application with necking
- Fig. 7 : Application with necking - applied using the swirl method to the outer sheet of a component t be folded. In places where less material is required, especially in curves, the adhesive volume can be systematically adjusted while still maintaining a consistently high application quality.
- Fig. 8 : Bead and swirl applicator rolled into one : The applicator E-swirl 2 ADX BIW enables traditional bead applications as well as swirl applications with equal precision
|
| En ligne : |
https://drive.google.com/file/d/1LTenMb6o_cr4SDWldQEGT92ezcIdBYU1/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33597 |
in ADHESION - ADHESIVES + SEALANTS > Vol. 17, N° 1/2020 (2020) . - p. 24-27
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