1.Material selection

Aluminum alloy (6061/7075): lightweight, easy to process, suitable for anodizing coloring.

2. Design phase

Symmetry and Balance

Ensure symmetrical design of 3 blades, use CAD software (such as SolidWorks, Fusion 360) to simulate the center of gravity distribution, and avoid rotational shaking.

Bearing adaptation

Reserve precise installation holes for standard 608 bearings (22mm outer diameter x 8mm inner diameter x 7mm thickness), with a recommended tolerance of H7/h6 (tight fit).

Weight distribution: Analyze the center of gravity through simulation software (such as Fusion 360) to optimize blade thickness or hollow areas.

3. CNC machining process

Programming and Tool Selection:

Use CAM software (such as Mastercam) to generate tool paths, and prioritize using hard alloy cutting tools (Φ 3-6mm)

Rough machining: Layered cutting, with a reserved margin of 0.2-0.5mm.

Precision machining: High speed (8000-12000 RPM), low feed rate to ensure surface smoothness.

Clamping technique:

Use customized fixtures or vacuum suction cups to fix thin-walled workpieces and avoid deformation.

Multiple flipping processes are carried out to ensure the positional accuracy of each side.

Key machining points:

The bearing hole needs to be precision repaired with a reamer, and the inner wall roughness should be ≤ Ra1.6.

Chamfering of blade edges (C0.3-C0.5) to prevent scratching hands.

4. Post processing technology

Sandblasting: 120-220 grit sand particles, uniform matte effect.

Anodizing (aluminum alloy): custom colors (black, blue,red).

5. Assembly and debugging

Bearing installation: After pressing in the bearing, drip lubricating oil (such as silicone lubricant).

Dynamic balance test: Check on a rotating tester, drill holes or paste counterweights in areas with heavy weights.

6.Machining deformation:

Choose aluminum alloy after T6 heat treatment to reduce residual stress.

Optimize cutting parameters (such as reducing feed rate).

7.Safety and Quality Inspection

Before machining: calibrate the machine tool to avoid tool interference.

Quality inspection standards:

Dimensional tolerance: ± 0.05mm (± 0.02mm for critical parts).

The surface is free of scratches and burrs, and the rotation time is ≥ 3 minutes (high-quality bearings can reach 5-8 minutes).