CNC Prototyping Step By Step:
Step 1: CNC machining the first side. As an subtractive manufacturing process, CNC machining cut away the unwanted material from a block of base material to get the intended part, the material block's dimensions were usually (L×W×H) 2-3 cm bigger than the part milled. To get a high CNC milling efficiency, it usually started from coarse machining by big and strong cutting tools to fast remove the unwanted material, then gradually the smaller tools to mill the fine and detailed features.
|Step 2: CNC machining the second side. For the multi-sided milled part made by 3 axis CNC machining, the workpiece was rotated manually each time to mill each side, the CNC machinist must accurately relocate the workpiece to ensure the milling tolerance. 5 sides (normally 6 sides of a part) of this aluminum prototype part were rotated to be milled, and an ABS fixture (the bottom yellow one) was milled to prevent the workpiece deformation during its multi-sided machining.|
Step 7: The finished aluminum milled and anodized dark blue prototype part for delivery. After finishing the liquid pressure and fitting test, the customer proceeded with low volume manufacturing of 10 units shortly.
How to Make a Quality Aluminum Milled and Anodized Part:
• Quality aluminum material used. The anodizing result was considerably affected by the aluminum material composition.
• Quality anodizing technology. The intended colors and glosses could be matched as close as possible by quality anodizing technology.
• Quality CNC milling. Good CNC milling delivered the tight tolerance also helped get better subsequent surface finishing quality.