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CNC MACHINING PART
WANDA-AN
CNC-010-003
CNC MACHINERY PART
 | What's the CNC Machining ? |
CNC (Computer Numerical Control) machining is a computer-controlled manufacturing process where pre-programmed software dictates the movement of factory tools and machinery. It is used to cut, shape, and create precision parts from materials like metal, plastic, wood, and composites. |
| The CNC Machining Processing |
CNC Machining Process Step 1: Design & CAD/CAM Preparation Software: Auto CAD, Solid Works, Fusion 360. Design for Manufacture (DFM): Avoid sharp internal corners (use radii ≥0.5mm). Minimum wall thickness: 1mm (for stability). Standardize hole sizes (e.g., M3, M4). |
| Step 2: Tool Selection | |||
| Operation | Tool Type | Coating | Notes |
| Roughing | 3-flute carbide end mill | TiAlN | High material removal |
| Finishing | 2-flute carbide end mill | ZrN | Better surface finish |
| Drilling | Carbide drill bit | TiN | Use peck drilling for deep holes |
| Threading | TiN-coated tap | TiN | Avoid thread milling for small holes |
| Step 3: Machining Parameters | |||
| Operation | Cutting Speed (SFM) | Feed Rate (IPM) | Depth of Cut (DOC) |
| Face Milling | 800–1500 | 0.003–0.010/tooth | 0.5–5mm |
| Pocketing | 600–1200 | 0.002–0.008/tooth | 0.5–3mm |
| Drilling | 200–500 | 0.005–0.015/rev | Full depth |
| 4. Quality Control & Tolerances | ||
| Feature | Standard Tolerance | High Precision |
| Hole Diameter | ±0.05 mm | ±0.02 mm |
| Flatness | 0.1 mm/100 mm | 0.02 mm/100 mm |
| Positional | ±0.1 mm | ±0.025 mm |
| Inspection Tools: | ||
| Calipers/Vernier: For basic dimensions. | ||
| CMM: For complex geometries. | ||
| Surface Roughness Tester: For finish validation. | ||
| 5. Common Defects & Solutions | ||
| Defect | Cause | Solution |
| Burrs | Dull tools, high feed rate | Use sharp tools, deburr edges |
| Chatter Marks | Low rigidity, incorrect speeds | Reduce DOC, increase RPM |
| Tool Breakage | Excessive DOC, poor coolant | Optimize cutting parameters |
| Poor Surface Finish | Wrong tool path, low speed | Use finishing end mill, adjust feed |
| Material Selection for CNC Machining | |||
| Aluminum Alloy | Temper | Machinability | Typical Applications |
| 6061-T6 | T6 | Excellent | Aerospace, automotive, structural parts |
| 7075-T6 | T6 | Good (harder) | High-stress aerospace/military parts |
| 2024-T3 | T3 | Good | Aircraft skins, fasteners |
| 5052-H32 | H32 | Fair (softer) | Marine, sheet metal parts |
| 6082-T6 | T6 | Excellent | EU alternative to 6061 |
How CNC Machines Cut Aluminum
Rotating Cutting Tools: Spinning at 10,000–30,000 RPM, tools shear off aluminum chips.
Precision Movement: The machine follows G-code to move in X, Y, Z axes (and A/B for 5-axis).
Material Properties:
Aluminum is softer than steel, allowing faster speeds.
Heat dissipation prevents warping (unlike plastics).
CNC MACHINERY PART
| What's the CNC Machining ? |
CNC (Computer Numerical Control) machining is a computer-controlled manufacturing process where pre-programmed software dictates the movement of factory tools and machinery. It is used to cut, shape, and create precision parts from materials like metal, plastic, wood, and composites. |
| The CNC Machining Processing |
CNC Machining Process Step 1: Design & CAD/CAM Preparation Software: Auto CAD, Solid Works, Fusion 360. Design for Manufacture (DFM): Avoid sharp internal corners (use radii ≥0.5mm). Minimum wall thickness: 1mm (for stability). Standardize hole sizes (e.g., M3, M4). |
| Step 2: Tool Selection | |||
| Operation | Tool Type | Coating | Notes |
| Roughing | 3-flute carbide end mill | TiAlN | High material removal |
| Finishing | 2-flute carbide end mill | ZrN | Better surface finish |
| Drilling | Carbide drill bit | TiN | Use peck drilling for deep holes |
| Threading | TiN-coated tap | TiN | Avoid thread milling for small holes |
| Step 3: Machining Parameters | |||
| Operation | Cutting Speed (SFM) | Feed Rate (IPM) | Depth of Cut (DOC) |
| Face Milling | 800–1500 | 0.003–0.010/tooth | 0.5–5mm |
| Pocketing | 600–1200 | 0.002–0.008/tooth | 0.5–3mm |
| Drilling | 200–500 | 0.005–0.015/rev | Full depth |
| 4. Quality Control & Tolerances | ||
| Feature | Standard Tolerance | High Precision |
| Hole Diameter | ±0.05 mm | ±0.02 mm |
| Flatness | 0.1 mm/100 mm | 0.02 mm/100 mm |
| Positional | ±0.1 mm | ±0.025 mm |
| Inspection Tools: | ||
| Calipers/Vernier: For basic dimensions. | ||
| CMM: For complex geometries. | ||
| Surface Roughness Tester: For finish validation. | ||
| 5. Common Defects & Solutions | ||
| Defect | Cause | Solution |
| Burrs | Dull tools, high feed rate | Use sharp tools, deburr edges |
| Chatter Marks | Low rigidity, incorrect speeds | Reduce DOC, increase RPM |
| Tool Breakage | Excessive DOC, poor coolant | Optimize cutting parameters |
| Poor Surface Finish | Wrong tool path, low speed | Use finishing end mill, adjust feed |
| Material Selection for CNC Machining | |||
| Aluminum Alloy | Temper | Machinability | Typical Applications |
| 6061-T6 | T6 | Excellent | Aerospace, automotive, structural parts |
| 7075-T6 | T6 | Good (harder) | High-stress aerospace/military parts |
| 2024-T3 | T3 | Good | Aircraft skins, fasteners |
| 5052-H32 | H32 | Fair (softer) | Marine, sheet metal parts |
| 6082-T6 | T6 | Excellent | EU alternative to 6061 |
How CNC Machines Cut Aluminum
Rotating Cutting Tools: Spinning at 10,000–30,000 RPM, tools shear off aluminum chips.
Precision Movement: The machine follows G-code to move in X, Y, Z axes (and A/B for 5-axis).
Material Properties:
Aluminum is softer than steel, allowing faster speeds.
Heat dissipation prevents warping (unlike plastics).
