什么是CNC铣削？
CNC铣削是一种减材加工工艺，计算机控制的旋转切削工具从实体工件上去除材料。 Unlike turning — which spins the part — milling spins the tool and moves it across a stationary or indexed workpiece along multiple linear and rotational axes.
3-axis milling moves the cutter in X, Y and Z — sufficient for the majority of prismatic features: flat surfaces, pockets, slots and drilled holes. It is the most cost-effective approach for parts where all features are accessible from one face or a small number of setups.
5-axis simultaneous milling adds two rotational axes (A and B, or A and C), letting the spindle approach the workpiece from virtually any angle in a single clamping. This eliminates repositioning errors and is essential for compound-curve aerospace surfaces, medical bone plates, and turbomachinery components. Learn more on our dedicated 5-axis page.
Choose 3-axis for flat or simply stepped geometry. Choose 4- or 5-axis when your part has compound angles, undercuts, or when you need to minimize setups to hit tight positional tolerances across multiple faces.
CNC铣削方式
我们运营3轴、4轴和5轴CNC铣削加工中心，最佳选择取决于零件几何形状、批量大小和所需公差。
3轴铣削
The workhorse of CNC milling. Three linear axes (X, Y, Z) handle the vast majority of prismatic parts — housings, brackets, plates, and blocks with flat or gently contoured surfaces.
- Standard tolerance ±0.01mm
- Flat & contoured surfaces
- Pockets, slots & through-holes
- Max part 600 × 400 × 300 mm
Ideal for: brackets, enclosures, plates, jigs and fixtures
4轴铣削
A rotary A-axis added to 3-axis movement. Parts can be indexed or continuously rotated during cutting, eliminating secondary setups for features around a cylindrical or complex profile.
- Rotational features in one setup
- Complex profiles & cams
- Reduced fixturing cost
- Excellent for shaft-style parts
Ideal for: cams, impeller blanks, manifolds with radial features
5轴铣削
Simultaneous 5-axis movement lets the cutter approach from any direction. Complex compound curves, undercuts, and tight cavities are cut in a single setup — reducing errors and cycle time.
- Achievable tolerance ±0.001mm
- Aerospace & medical geometry
- Single-setup complex parts
- Undercuts & compound curves
Ideal for: turbine blades, medical implants, aerospace structural parts
了解更多规格对比
3轴和5轴铣削服务的快速参考规格。
| 规格 | 3轴 | 5轴 |
|---|---|---|
| 标准公差 | ±0.01 mm | ±0.005 mm |
| 高精度 | ±0.005 mm | ±0.001 mm |
| 最大零件尺寸 | 600 × 400 × 300 mm | 500 × 400 × 250 mm |
| 最小特征尺寸 | 0.5 mm | 0.3 mm |
| 最小壁厚 | 0.5 mm | 0.4 mm |
| 最大深宽比 | 4:1 | 6:1 |
| 表面粗糙度Ra | 0.8 μm std | 0.4 μm std |
可达公差取决于材料、零件几何形状和特征尺寸。如需关键尺寸的DFM审查，请联系我们。
可加工材料
我们备有并加工50多种金属和工程塑料，常见CNC铣削材料：
表面处理
所有表面处理均可在厂内完成，处理时间和费用因工艺而异。
原加工面
Ra 1.6–3.2 μm direct off the machine. Clean, functional surfaces with visible tool marks.
阳极氧化（II型与III型）
Electrochemical oxide layer on aluminum. Type II decorative; Type III hard for wear resistance.
硬质阳极氧化
Type III anodizing to 25–125 μm. Excellent hardness (60–70 HRC equivalent) and dielectric properties.
喷砂
Uniform matte texture, Ra 0.8–2.0 μm. Removes machining marks and improves aesthetics.
喷塑
Durable polymer finish in any RAL/Pantone color. Impact and corrosion resistant.
电解抛光
Electrochemical surface smoothing. Reduces Ra by 50%, ideal for stainless steel medical parts.
镀镍
Electroless or electrolytic nickel. Corrosion resistance, solderability, or as undercoat for chrome.
激光刻字
Permanent part marking — serial numbers, logos, QR codes. No mask or ink required.
CNC铣削设计指南
遵循这些指南有助于获得准确报价，避免昂贵的重新设计，并确保您的零件可按所需公差制造。
- Minimum wall thickness 0.5 mm for metals, 1.0 mm for plastics — thinner walls vibrate during cutting and can deflect.
- Inside corner radius ≥ 1/3 of cavity depth — end mill diameter must fit the corner radius; design accordingly.
- Avoid deep narrow slots (depth > 6× width) — tool deflection and chip evacuation become critical beyond this ratio.
- Specify surface finish Ra only where functionally required — unnecessary finishing callouts add cost and lead time.
- Add draft to vertical walls only if needed for function — draft is for molding, not machining; omit unless necessary.
- Provide a 2D drawing for GD&T callouts and tight tolerances — model alone cannot convey datum references or geometric tolerances.
服务行业
我们的CNC铣削能力服务于六大行业的高要求应用。
准备好加工您的零件了吗？
上传CAD文件，24小时内获得详细的CNC铣削报价，无最小起订量，从原型到量产均可。
Need turning too? If your part has both milled features (pockets, flats, cross-holes) AND a turned diameter or threaded shaft, run it through our combined milling-and-turning shop instead — one quote, one setup, tighter inter-feature tolerance.
See CNC Milling + Turning Services
