Crank
描述
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.
主要功能
- 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 |
|---|---|
| 產品類別 | Aluminum Forging Bicycle Parts |
| 申請 | Bicycle and e-bike cranksets (right/drive side) |
| 主要過程 | 閉式熱鍛造（熱鍛造壓機 600T–8,000T） |
| 材質 | 6061-F aluminum alloy |
| 熱處理 | Per customer specification (published specification: 6061-F) |
| 二次加工 | CNC 加工（52 台加工中心、30 台銑床）、銑削、振動磨削 |
| 表面處理 | 按要求進行陽極氧化（包括硬陽極氧化）、噴射粉碎、電子塗層或塗漆。 |
| 檢查 | Zeiss CMM (4 units), hardness testers, spectrometer, fluorescent penetrant inspection line |
| Weight | 0.29 kg |
| 尺寸與公差 | 按客戶提供2D/3D圖紙 |
| 品質管理系統 | IATF 16949:2016、ISO 14001:2015 |
Forged Aluminum Bicycle Right Crank Manufacturing Process
- 繪圖評估與 DFM我們確認合金、載荷方向和關鍵尺寸，然後執行 QForm 模擬，以預測金屬流動和缺陷風險。.
- 設計與製造銑刀組數（例如，阻斷刀和完成刀）視零件的複雜程度而定，銑刀輪廓則使用便攜式3D掃描儀進行檢查。.
- 熱鍛造600T–8,000T 熱鍛造壓 Presses 的閉式成形技術創造出持續的晶粒流，並遵循零件的輪廓。.
- 熱處理T4 溶液處理和 T6 人工老化處理均在廠內進行，參數由合金和強度要求設定。.
- CNC加工 以及完成孔、螺紋和接合面均經過機械加工，然後根據需要進行拋光、振動拋光、噴丸或陽極氧化處理。.
- 檢查與運輸尺寸、硬度及化學成分均通過 CMM、硬度測試儀及分光光度儀進行驗證，且所有批次的產品均遵照 IATF 16949 的標準進行追蹤。.
常見問題
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?
是的。Al Forge Tech 主要作為 OEM 供應商提供服務，我們的工程師可以在構思或繪圖階段就設計的可生產性（DFM）提供意見，例如調整薄邊緣、急切的切面變化或設計角度，以避免殘料和未填充區域。QForm 模擬能及早預測金屬流動，並與我們已有的模具設計經驗進行交叉核對。.
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.
- 線上查詢： 聯絡我們
- 電子郵件： [email protected]
若要比較相似的零件，請瀏覽 Aluminum Forging Bicycle Parts 以及我們的 汽車鋁合金鍛造應用, 或參觀 公司簡介 關於我們的設備與認證。.
