Adaptateur de buse aéronautique — 5 axes, premier article AS9102
Un adaptateur de buse aluminium galbé, usiné complet en une seule prise 5 axes, avec rapport de premier article AS9102 et traçabilité complète jusqu'à la coulée.
Spécification de la pièce
- Secteur
- Aerospace & Defence
- Procédé
- 5-Axis Machining
- Matière
- Aluminium 7075-T651
- Tolérance
- ⌀0.02 mm true position
- Finition
- Chromate conversion, MIL-DTL-5541
- Quantité
- 120 / year
- Délai
- 22 working days
Identité du client non divulguée (NDA).
Problématique
The adapter has features on five faces with true position between them specified at ⌀0.05 mm. Machining it in three setups on a 3-axis machine consumed the entire tolerance in fixture repeatability before any cutting error was counted.
Solution
Machined complete in one 5-axis setup on a trunnion machine, with the CAM programme simulated against the full kinematic model including fixture and holders. The CMM programme measures from the same datum scheme the CAM used, so the report reflects how the part was actually made.
Résultat
True position measures within ⌀0.02 mm across all five faces — less than half the specified tolerance. AS9102 Forms 1, 2 and 3 were accepted without comment on the first submission, and the part moved to production release three weeks earlier than planned.
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