Are you struggling to achieve high-precision threads for your mechanical parts? Or looking for a more efficient alternative to traditional tapping methods? CNC milling thread technology might be the solution you need. This guide breaks down everything from its core advantages to real-world applications, helping you master this critical machining process.
1. Pourquoi choisir le fraisage CNC pour l'usinage de filetages? Avantages clés
Par rapport aux méthodes traditionnelles comme le taraudage ou la découpe, CNC milling thread se distingue par quatre avantages imbattables. Le tableau ci-dessous compare clairement ses performances avec un taraudage conventionnel:
| Fonctionnalité | Fil de fraisage CNC | Taraudage traditionnel |
| Précision | Contrôle le parcours de l'outil via la programmation CNC; Taille du fil, forme, et erreurs de position < 0.01MM | Relies on tool accuracy; prone to size deviations (errors often > 0.05MM) |
| Flexibilité | Handles left/right-hand, internal/external threads; 1 cutter for multiple thread specs | Requires different taps for different thread types; limited to simple structures |
| Efficacité | Continuous cutting; reduces tool change time by 30-50% for high-volume tasks | Changements d'outils fréquents; longer auxiliary time |
| Qualité de surface | Finition lisse (Rampe < 1.6µm); no burrs/tool marks | Often leaves burrs; requires extra polishing |
Par exemple, in precision gear manufacturing, CNC milling thread ensures that the thread fit between gear shafts meets strict clearance standards—something traditional tapping can rarely achieve consistently.
2. Outils essentiels pour le filetage de fraisage CNC
Choosing the right cutter is critical to successful CNC milling thread opérations. There are two main types of thread mills, each with unique use cases:
| Cutter Type | Structure | Applications idéales | Limitation clé |
| Integral Carbide Thread Mill | One-piece carbide design | Petits trous (profondeur < tool length); high-hardness materials (Par exemple, acier inoxydable) | Cannot process deep holes (risk of tool breakage) |
| Clamp-Type Carbide Insert Mill | Replaceable carbide inserts | Deep holes (profondeur > insert length); large-batch production; versatile material compatibility | Slightly lower precision than integral mills (due to insert gaps) |
Pour la pointe: For aluminum alloy parts (common in the electronics industry), an integral carbide mill with a TiAlN coating works best—it reduces friction and extends outil life by 20%.
3. Processus de filetage de fraisage CNC étape par étape
Suivez ce linéaire, 5-step workflow to ensure error-free thread machining. Each step builds on the previous one, forming a 因果链 (chaîne de cause à effet) for quality results:
- Bottom Hole Preparation
The bottom hole diameter must be slightly smaller than the final thread diameter (use the formula: Diamètre du trou inférieur = diamètre principal du filetage – Pas). Par exemple, un filetage M10×1,5 nécessite un trou inférieur de 8,5 mm. Mauvaise qualité du fond du trou (Par exemple, surface rugueuse ou mauvais diamètre) entraînera directement des inexactitudes dans les threads.
- Programmation CNC
Écrire un programme à définir:
- Coordonnées de début/fin de l'outil
- Pas de filetage et angle d'hélice
- Vitesse de coupe (150-300m / min pour l'acier; 300-500m / min pour l'aluminium)
- Taux d'alimentation (faire correspondre le pas pour éviter la distorsion du filetage)
- Serrage de la pièce & Positionnement
Fixez la pièce à la table de la machine à l'aide d'étaux ou de fixations. Alignez son centre avec le système de coordonnées CNC : même un désalignement de 0,1 mm peut ruiner la précision de la position du filetage..
- Test de coupe & Ajustement
Run a trial cut on a scrap piece first. Vérifier:
- Is the thread size correct (use a thread gauge)?
- Are there burrs or tool marks?
Adjust the program (Par exemple, reduce feed rate) if issues arise.
- Formal Machining
Start full production after test cutting passes. Monitor the process for unusual noises (a sign of tool wear) to prevent defects.
4. Applications réelles du filetage de fraisage CNC
CNC milling thread is widely used across industries where precision and efficiency matter. Here are four key sectors with specific use cases:
| Industrie | Scénario d'application | Key Requirement Addressed by CNC Milling Thread |
| Aérospatial | Threads on aircraft engine turbine blades | Haute précision (ensures no fuel leaks); résistance à haute température |
| Automobile | Threads on transmission housings | Grande efficacité (1000+ parties/jour); réduction des coûts |
| Fabrication de moules | Threads on mold guide pillars | Complex shape compatibility (molds have irregular surfaces) |
| Électronique | Threads on smartphone frame screws | Small-space operation (threads as small as M1.6); miniaturization support |
Take the aerospace industry as an example: A single aircraft engine has over 500 threaded connections. CNC milling thread ensures each connection meets AS9100 standards, directly affecting flight safety.
5. Le point de vue de Yigu Technology sur le filetage de fraisage CNC
À la technologie Yigu, nous croyons CNC milling thread is no longer a “nice-to-have” but a “must-have” for modern manufacturing. Our customers in automotive and electronics sectors often report 40% faster production cycles and 25% fewer thread defects after switching to this technology. We recommend pairing it with our high-precision CNC mills (equipped with Fanuc 0i-MF systems) for optimal results—they reduce programming time by simplifying parameter input, making the process accessible even for less experienced operators.
FAQ sur le filetage de fraisage CNC
- Q: Can CNC milling thread process plastic parts?
UN: Oui. Use a low cutting speed (80-120m / mon) and a sharp carbide mill to avoid plastic melting or chipping.
- Q: How often should I replace thread mill inserts?
UN: Pour les pièces en acier, replace inserts after 500-800 trous; pour l'aluminium, remplacer après 1500-2000 trous. Signs of wear (Par exemple, dull cutting edges) also indicate replacement is needed.
- Q: Is CNC milling thread more expensive than traditional tapping?
UN: Initial costs (cutter + programmation) are higher, but long-term costs are lower—you save on tool changes, reprise, et le travail. Pour les lots supérieurs 1000 parties, CNC milling is 15-20% moins cher.