ステム
説明
Forged Aluminum 3D Bicycle Stem: Long-Reach Handlebar Stem
The forged aluminum 3D bicycle stem connects the handlebar to the fork steerer tube. This long-reach version has a four-bolt handlebar clamp at one end, a steerer clamp cylinder at the other, and a hollow-section body between them. Stem length affects riding position and steering response, and long-reach stems are common on road and cross-country mountain bikes.
The stem carries bending and torsional loads from the handlebar and is a safety-critical bicycle part. Al Forge Tech (AFT) 3D hot forges the handlebar clamp, body and steerer clamp in one operation so grain flow runs continuously to both ends, with lightening pockets formed during forging. After heat treatment, clamp bores, slots and threads are CNC-machined, and the angle between the two bores is verified on CMM.
主な機能
- 3D forged handlebar clamp, body and steerer clamp in one operation
- Long-reach design for road and mountain bikes
- Clamp bores, slots and threads CNC-machined
- Bore angle and diameter verified on CMM
Forged Aluminum 3D Bicycle Stem Specifications and Manufacturing Capability
| 商品 | 詳細 |
|---|---|
| 製品カテゴリー | Aluminum Forging Bicycle Parts |
| 申請 | Stems for road bikes, mountain bikes and e-bikes |
| 主なプロセス | 閉型熱間鍛造（熱間鍛造プレス：600T～8,000T） |
| 素材 | お客様の仕様に合わせて選択可能。2xxx、5xxx、6xxx、7xxx シリーズのアルミニウム合金（例：2014、6061、6082、7075） |
| 熱処理 | 合金および強度要件による社内T4処理（8ユニット）およびT6人工老化（7ユニット） |
| 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 |
| 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 3D Bicycle Stem 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 a 3D forged stem differ from an extruded and machined stem?
An extruded-and-machined stem is cut from an extrusion, so its body section is limited by the extrusion direction and lightening is usually done by drilling or milling. A 3D forged stem is formed in several directions at once, so body sections and lightening pockets can follow the loads and grain flow follows the contour. For a stem under bending and torsion, 3D forging reaches the required strength with a more rational material distribution.
How do long and short stems differ in manufacturing?
A long stem has a longer body, so material must be distributed evenly along its length during forging and bending distortion must be controlled after heat treatment. A short stem is compact, with material concentrated in the two clamps. AFT plans dies by stem length, angle and handlebar clamp style, and checks the angle between bores after heat treatment.
How does a forged aluminum Forged Aluminum 3D Bicycle Stem compare with casting or machining from billet?
Forging shapes aluminum in the solid state under pressure, so the grain flow follows the part contour and the porosity and shrinkage common in castings are avoided. Compared with machining from solid billet, a near-net-shape forging removes less material and shortens machining time. For a Forged Aluminum 3D Bicycle Stem under repeated loads, forging balances strength and weight; the final choice still depends on design loads and volume.
How do you keep the Forged Aluminum 3D Bicycle Stem 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 3D Bicycle Stem stable across lots.
How are MOQ and lead time for the Forged Aluminum 3D Bicycle Stem determined?
MOQ and lead time depend on part size, number of die sets, alloy and machining scope, and are confirmed in the quotation after drawing review. The typical sequence is die development, forged samples, sample approval and then mass production. Sharing your annual volume and call-off schedule helps us plan dies and capacity for the Forged Aluminum 3D Bicycle Stem.
Request a Quote for the Forged Aluminum 3D Bicycle Stem
Developing a new Forged Aluminum 3D Bicycle Stem 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.
- オンラインのお問い合わせ： お問い合わせ
- メールアドレス: [email protected]
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。.
