Spider
描述
Forged Aluminum Bicycle Spider (Stepped): Five-Arm Chainring Carrier with Offset
The stepped forged aluminum bicycle spider is also a five-arm chainring carrier, but its hub is a deeper cup, the five arms step outward from the cup rim with a height change, and one arm carries an extra extended lug. The three-dimensional form creates an offset between the chainring mounting face and the hub to match the chainline of the crank and frame.
The deep cup and stepped arms make metal flow paths longer and more complex during forging. Al Forge Tech (AFT) plans billet and dies with QForm simulation and hot forges the cup and arms so grain flow turns from the cup wall into each arm. After heat treatment, the center bore, bolt holes and lug features are CNC-machined, and BCD, offset and flatness are verified on CMM.
主要功能
- Deep cup hub and stepped five arms forged in one piece
- 3D form provides chainring offset to match chainline
- Extended lug machinable as an extra mounting point
- BCD, offset and flatness measured on CMM
Forged Aluminum Bicycle Spider (Stepped) Specifications and Manufacturing Capability
| 商品 | 詳細 |
|---|---|
| 產品類別 | Aluminum Forging Bicycle Parts |
| 申請 | Chainring carriers for cranksets requiring a specific chainline offset |
| 主要過程 | 閉式熱鍛造（熱鍛造壓機 600T–8,000T） |
| 材質 | Selected to customer specification; 2xxx, 5xxx, 6xxx and 7xxx series aluminum alloys available (e.g. 2014, 6061, 6082, 7075) |
| 熱處理 | 根據合金與強度要求而提供的內部 T4 處理方案（8 套）及 T6 人工老化處理方案（7 套） |
| 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 |
| 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 Spider (Stepped) 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
What is spider offset, and what does it affect?
Offset is the axial distance between the chainring mounting face and the hub or crank mounting face. It sets the chainring’s lateral position on the bike, that is, the chainline. An incorrect chainline increases chain angle across the cassette, affecting shifting and wear. The stepped spider forges the required offset directly, reducing the need for spacers or extra machining.
What needs attention when forging a stepped spider?
The deep cup and stepped arms force material to travel a longer path, risking laps at cup-wall corners or underfill at the arm tips. AFT simulates metal flow with QForm first, adjusts billet, preform and die design based on the results, and confirms complete form through first-, middle- and last-piece checks.
Can you assess forging feasibility while the Forged Aluminum Bicycle Spider (Stepped) 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。.
Is heat treatment for the Forged Aluminum Bicycle Spider (Stepped) 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 Spider (Stepped) 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 Al Forge Tech supply the Forged Aluminum Bicycle Spider (Stepped) from forging through machining?
Yes. Forging, heat treatment, CNC machining, surface finishing and inspection are integrated in one facility: 52 CNC machining centers (40 four-axis and 12 4.5-axis), 30 lathes (14 with robotic loading), plus broaching, burnishing and centerless grinding. The Forged Aluminum Bicycle Spider (Stepped) can be delivered as a forged blank, semi-finished or fully machined part.
Request a Quote for the Forged Aluminum Bicycle Spider (Stepped)
Developing a new Forged Aluminum Bicycle Spider (Stepped) 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。.
