Usinage et assemblage · Guide de vérification des composants · Litian Yunde
Map the surfaces by function. Original explanatory schematic; not to scale and not a product test result.
A finishing drawing should identify the areas to coat, bond, mask or leave untouched. A single colour or gloss instruction cannot describe every functional surface. Use a zone map and define the order of operations so coating does not silently change an adhesive or fit interface.
Give each zone a clear purpose
Mark the visible finish zone, bond zone, sliding face, electrical contact or identification area as separate features where applicable. State whether overspray is allowed at a boundary and how that boundary is inspected. Keep masking dimensions tied to datums. Instructions such as “keep the back clean” are difficult to reproduce on a complex or handed part.
Review the sequence before finishing
A surface intended for bonding needs the preparation required by the chosen adhesive and material system. Confirm whether bonding precedes or follows painting and who controls the surface between operations. Masking tape removal, handling and storage should not undermine the approved preparation. A visually neat coating boundary is useful but does not establish adhesive compatibility or cleanliness.
Check after the last relevant operation
Inspect the finished part for zone position, edge quality and any interference with mating components. Record the coating system where it affects a controlled interface. If a part is repainted, revisit the fit and bond zones before accepting it. Rework should restore the approved configuration rather than adding successive layers without checking their effect.
Example: a cover bonded to mounting pads
The outside of a cover requires a cosmetic coating, while small internal pads require an adhesive process. The drawing gives each pad an identified keep-clear region and specifies which operation happens first. The sample review photographs these regions before bonding and checks the final coating boundary. The record is specific to the approved finish and adhesive systems.
Scénario à titre d'exemple ; il ne s'agit ni d'un cas client ni d'un résultat de production avéré.
Éléments à convenir avant de passer commande
| Article à évaluer | Consigner pour accord |
|---|---|
| Zone map | Named finish, bond and keep-clear areas. |
| Boundary control | Datum-based location and allowed edge variation. |
| Process sequence | Painting, preparation, bonding and handling order. |
| Rework rule | How zones and interfaces are restored and rechecked. |
Questions posées par les acheteurs
Is masking sufficient surface preparation for bonding?
No. It preserves an area but does not replace the adhesive supplier’s preparation requirements.
Should hidden surfaces receive the same coating?
Only if the specification calls for it and the coating is compatible with their function.
Contexte technique et lectures complémentaires
Document d'information : WEST SYSTEM : Préparation de la surface. La liste de contrôle du projet et l'exemple ci-dessus constituent des recommandations rédactionnelles ; ce document ne certifie pas un composant Litian Yunde.
- Validation d'un échantillon de surface en fibre de carbone pour les commandes ultérieures
- Assemblages collés en fibre de carbone : contrôle du chevauchement et de la géométrie de la ligne de collage
- Parcourez le centre de connaissances sur la fibre de carbone
Passez en revue votre composant avec Litian Yunde
Veuillez nous communiquer la version révisée du plan, l'application prévue ainsi que la question relative à l'interface ou au contrôle que vous souhaitez voir résolue. Les exigences de construction et de réception mentionnées sont validées pour ce projet spécifique.