CNC Prototyping Step By Step:
Step 1: CNC machining the first side. As an subtractive manufacturing process, the base material in block to be milled was usually 3 cm longer & wider and 0.5 cm thicker than the part dimensions. It usually started from coarse milling by big and strong cutting tools to fast remove the unwanted material, to gradually smaller tools to mill the fine and detailed features.
|Step 2: CNC machining the second side. For 3 axis CNC the multi-sided milled part, the workpiece was rotated manually to be milled side by side, the workpiece must be accurately relocate to ensure the milling tolerance. 5 sides (usually 6 sides of a part) of this aluminum prototype were rotated to be milled. An ABS fixture (the bottom yellow one) was used to prevent the workpiece deformation during prototype machining.|
Step 7: The finished aluminum prototype for delivery. After finishing liquid pressure and fitting test of the arrived prototype, customer was happy to proceed with the low volume manufacturing of 10 units shortly.
How to Make a Quality Aluminum Milled and Anodized Prototype:
• Quality Material Used. The anodizing quality was considerably affected by the aluminum material composition.
• Quality Anodizing Technique. The intended color & gloss can be matched as close as possible by excellent anodizing technique.
• Quality CNC Milling. CNC milling delivered the tight tolerance also helped get quality surface finishing.