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。
常见问题
3轴、4轴和5轴CNC铣削有什么区别？+
3轴铣削让刀具沿X、Y、Z移动，适合平面和方形零件。4轴增加一个旋转轴，无需重新装夹即可绕零件加工。5轴再增加一个旋转轴，使刀具在一次装夹中可达几乎任意面，适合复杂轮廓。我们三种都能做，并为您的零件选择最具成本效益的方式。
你们的CNC铣削能达到什么公差？+
我们的CNC铣削可保持±0.005mm的标准公差，关键部位的更严公差低至±0.001mm，表面粗糙度可达Ra 0.4μm。关键尺寸经CMM检测，并可应要求随附检验报告。
CNC铣削可以加工哪些材料？+
我们铣削铝（6061、7075）、不锈钢（303、304、316L）、钛、黄铜、铜、碳钢和工具钢，以及PEEK、POM和尼龙等工程塑料。航空航天和医疗零件可提供材料证书和可追溯性。
CNC铣削零件有最低起订量吗？+
没有。没有最低起订量。我们从单件样品到批量生产都能加工，每个零件采用相同的公差和质量流程。
多久能拿到CNC铣削报价？+
上传您的3D STEP文件和2D图纸，您将在1至12小时内收到含免费DFM审查的详细报价。大多数铣削零件的交期为3至10个工作日。
你们提供用于复杂零件的5轴CNC铣削吗？+
提供。除3轴和4轴铣削外，我们还为复杂轮廓、内凹及航空航天或医疗零件提供全联动五轴加工，全部符合ISO 9001 + 14001认证质量。
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
