Five-axis Flank Milling and Modeling the Spiral Bevel Gear with a Ruled Tooth Surface Design
Notice bibliographique
Résumé
Spiral bevel gears usually are cut by the machine tools which are specifically made for manufacturing spiral bevel gear. For some practical applications, such as repair, prototype, and small batch, there are only several spiral bevel gears need to be machined. It seems not wise to buy a gear manufacturing machine tool for cutting those several gears. Consequently, some other manufacturing methods are introduced to cope with this situation. Recent advances in computer numerical control (CNC) milling machine tools make \nit possible to manufacture good quality spiral bevel gears. Moreover, CNC milling machine tools are usually cheaper than the specific gear manufacturing machine tools. Even more, they are not only cut gears but also other parts. Therefore, computer numerical control (CNC) milling is introduced in industry to cut spiral bevel gears. \n \nEnd milling and flank milling are two modes of CNC milling. Compared to end milling, flank milling has been highlighted in quality enhancement, manufacturing time and cost reduction. Theoretically, the result of flank milling a developable ruled surface does not contain geometric deviations. Hence, flank milling has been widely used to machine the parts with ruled surface or the surface close to ruled surface, such as turbines and blades. Due to the fact that the tooth surfaces of spiral bevel gears are close to ruled surface (the tooth surface of Format-cut spiral bevel is part of a cone), flank milling can also be used to cut spiral bevel gears. \n \nHowever, there is no literature about flank milling spiral bevel gears. Moreover, the current existing tooth surface models (except the tooth surface of Format-cut spiral bevel gear) are implicit, which makes further calculation inefficient and difficult. To address these two problems, a new ruled tooth surface design is proposed to spiral bevel gears design. Subsequently, the design model is used to be machined with five-axis flank milling by introducing a new tool path planning approach. To obtain the simulate machined tooth surface, a new geometric envelope approach is proposed to calculate the cutter envelope surface as a closed-form representation. Then the result of geometric deviations, which are obtained by comparing the design tooth surface and the simulate machined tooth surface, shows the flank milling is appropriate to cut spiral bevel gears. Furthermore, the conventional face-milled model is also used as the design model for flank milling, and another result of geometric deviations is obtained. Subsequently, both results are compared, and the comparison shows that the proposed design reduces the geometric deviations effectively. Moreover, the closed-form simulate machined tooth surface can only be obtained by using the proposed design.
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Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,001 | 0,001 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».