Crank
説明
Forged Aluminum Bicycle Right Crank: 6061-F Crank with Integrated Spider
The forged aluminum bicycle right crank is the drive-side crank arm of a crankset, with a five-arm chainring spider integrated at the axle end and forged in one piece with the arm, and the pedal mounted at the other end. It is made of 6061-F aluminum with a published weight of 0.29 kg. The one-piece design removes the interface between spider and crank, increasing stiffness.
The right crank must transmit pedaling torque to the chainrings while carrying bending loads, and the central hub where the arms meet is the most complex and highly stressed area. Al Forge Tech (AFT) closed-die hot forges the crank so grain flow runs continuously from the crank arm into all five spider arms. After heat treatment, the axle hole, pedal hole and chainring bolt holes are CNC-machined, with BCD and center distance verified on CMM.
主な機能
- Crank arm and five-arm spider forged in one piece
- 6061-F aluminum, 0.29 kg (published specification)
- No spider interface, for higher stiffness
- BCD, center distance and hole positions measured on CMM
Forged Aluminum Bicycle Right Crank Specifications and Manufacturing Capability
| 商品 | 詳細 |
|---|---|
| 製品カテゴリー | Aluminum Forging Bicycle Parts |
| 申請 | Bicycle and e-bike cranksets (right/drive side) |
| 主なプロセス | 閉型熱間鍛造（熱間鍛造プレス：600T～8,000T） |
| 素材 | 6061-F aluminum alloy |
| 熱処理 | Per customer specification (published specification: 6061-F) |
| 二次加工 | CNC加工（52台の加工センター、30台の旋盤）、バリ取り、振動仕上げ |
| 表面仕上げ | 必要に応じて、陽極酸化（硬陽極酸化を含む）、ショットブラスト、電子コーティングまたは塗装 |
| 検査 | ザイツCMM（4台）、硬度計、分光計、蛍光透過検査ライン |
| Weight | 0.29 kg |
| 寸法と公差 | 顧客ごとに2D/3D図面 |
| 品質システム | IATF 16949:2016、ISO 14001:2015 |
Forged Aluminum Bicycle Right Crank Manufacturing Process
- ドローイングレビューとDFM合金、荷重方向、重要な寸法を確認し、その後 QForm シミュレーションを実行して金属流動と欠陥リスクを予測します。.
- デザインと製造ダイセットの数（例えば、ブロッカーダイとファイニッシャーダイ）は部品の複雑さに合わせて計画されており、ダイの形状は携帯型3Dスキャナーで確認されます。.
- 熱間鍛造600T～8,000Tの熱間鍛造プレスでの閉型成形により、部品の形状に沿った連続した粒状流が生成されます。.
- 熱処理T4溶液処理とT6人工老化は社内で実施され、合金および強度要件によって設定されたパラメータが使用されます。.
- CNC加工 そして仕上げ穴、スレッド、接合面は機械加工され、その後、必要に応じてバリ取り、振動仕上げ、ショットブラスト、または陽極酸化が行われます。.
- 検査と発送寸法、硬度、化学組成はCMM、硬度計、分光計を用いて確認され、ロットのトレーサビリティはIATF 16949に従って管理されています。.
よくある質問
How does an integrated right crank differ from one with a separate spider?
A separate-spider design bolts or splines the spider to the crank, allowing different spider specifications but adding an interface. An integrated right crank forms spider and arm from one forging with no interface, giving higher stiffness and fewer parts, but the chainring specification must be fixed at the design stage. AFT can develop either structure to the brand’s drawing.
How is complete fill ensured on a multi-branch forging like a right crank?
The central hub joins the crank arm and five spider arms, so material must split six ways during forging, and poor distribution leaves underfill at the arm tips. AFT plans billet shape and preforms with QForm simulation, forms the part progressively with blocker and finisher dies, and confirms the shape through first-, middle- and last-piece checks.
Is heat treatment for the Forged Aluminum Bicycle Right Crank done in-house?
Yes. Al Forge Tech operates 8 T4 solution treatment units and 7 T6 artificial aging units on site, so the Forged Aluminum Bicycle Right Crank can be solution treated, quenched and aged in the same facility before machining and inspection. Keeping heat treatment in-house removes inter-plant transport, reduces lead-time risk and keeps lot traceability within one quality system. Parameters are set according to the alloy grade and your specification.
Can you assess forging feasibility while the Forged Aluminum Bicycle Right Crank is still in design?
はい。Al Forge Techは主にOEMサプライヤーとして活動しており、エンジニアはコンセプトまたは図面段階で設計適合性評価(DFM)のフィードバックを提供できます。これには、薄い肋骨の調整、急な断面変更、およびラップやアンダーフィルを回避するために設計された角度の調整などが含まれます。QFormシミュレーションは金属流動を早期に予測し、その結果は当社による金型設計経験と比較されます。.
How do you keep the Forged Aluminum Bicycle Right Crank consistent from lot to lot?
Al Forge Tech runs incoming (IQC), in-process (IPQC) and final (FQC) inspection under IATF 16949:2016, supported by 4 Zeiss CMMs, hardness testers, a spectrometer and a fluorescent penetrant inspection line. First, middle and last pieces of every lot are checked against the die; when wear causes dimensional drift, the die is reworked to keep the Forged Aluminum Bicycle Right Crank stable across lots.
Request a Quote for the Forged Aluminum Bicycle Right Crank
Developing a new Forged Aluminum Bicycle Right Crank or converting an existing part to aluminum forging? Send us your 3D/2D drawings, alloy and temper, annual volume and finishing requirements. Our engineering team will reply with a feasibility review, die plan and quotation.
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類似のパーツを比較するには、閲覧してください。 Aluminum Forging Bicycle Parts そして私たちの 自動車用アルミニウム鍛造用途, または、こちらをご覧ください 会社紹介 当社の設備および認証について。.
