Aluminum alloy cnc processing technology

Author: MULAN - Plastic Molding Manufacturer

Among them, the process steps that need to use cutting tools are: Rough milling inner cavity: rough milling the contour shape of the inner cavity of the mobile phone shell, and machining the inner cavity and the positioning column combined with the fixture, which is very important for the subsequent processing links. Milling the antenna slot: Metal aluminum can shield (weaken) the radio frequency signal of the mobile phone, so it must be slotted so that the signal can have an entry and exit path. Therefore, milling the antenna slot is the most important and difficult step. The antenna slot must be milled evenly, and the necessary connection points must be maintained to ensure the strength and integrity of the metal shell.

Fine milling arc surface: For the 3D shaping of the metal aluminum alloy body, the contour of the arc surface is usually milled by a cnc machining center, which is also the most time-consuming process. Finished side milling: The 3D curved surface of the metal body is milled out by CNC, but there is still a circle of redundancy on the edge, so the side finishing process is required, and then the prototype of the metal shell can be seen. Polishing: High-speed and precise CNC machine tools are used, but it can only achieve A1-A2 level finish. To meet the subsequent processing requirements, it needs to be polished to A0 level finish, which can have a mirror effect.

High-gloss: Use high-grade ultra-high-speed CNC machine tools to cut the corners. This process is also called drilling or high-gloss processing. Fine milling inner cavity: After the aluminum alloy has been processed in multiple steps, the metal shell has been formed, and then the redundant materials such as the positioning column used for clamp locking are removed, so that the inside of the metal shell is completely clean. Milling conduction potential: The conductive effect of the aluminum alloy shell after anodic oxidation will become poor, so it is necessary to remove the partial anodized film to expose the metal to obtain a good grounding effect, and it is necessary to undergo another CNC treatment of milling conduction potential .

Polishing: Polishing refers to the processing method of reducing the surface roughness of the workpiece by mechanical, chemical or electrochemical action to obtain a bright and smooth surface. The conventional polishing process is mechanical polishing and chemical polishing. High-speed precision CNC machine tools are used for mechanical polishing to eliminate knife lines and prepare for subsequent sandblasting.