Time：2020/12/28Posted：Shenzhen Guangyu Precision Model Co., Ltd.
The process steps that need to use cutting tools are:
Rough milling of the inner cavity: rough milling the contour shape of the inner cavity of the mobile phone shell, and process the inner cavity and the positioning column combined with the fixture, which is very important for the subsequent processing links.
Milling antenna slot: Metal aluminum can shield (weaken) the radio frequency signal of the mobile phone, so it must go through the method of slotting, so that the signal can enter and exit the path. Therefore, milling the antenna slot is the most important and difficult step. The antenna slot must be milled uniformly and the necessary link points must be maintained to ensure the strength and integrity of the metal shell.
Precision milling arc surface: 3D shaping of metal aluminum alloy body, usually milling arc surface contour with CNC machining center, this is also the most time-consuming process.
Finish milling the side: The 3D arc of the metal body is milled by CNC, but there is still a circle of redundancy at the edge, so the finishing process of side milling is required, and then the prototype of the metal shell can be seen.
Polishing: Use high-speed and precise CNC machine tools, 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.
Highlight: Use a high-grade ultra-high-speed CNC machine tool to cut corners. This process is also called drilling or highlighting.
Finish milling the inner cavity: After the aluminum alloy is processed in multiple steps, the metal shell has been formed, and then the extra materials such as the positioning posts used for fixture locking are removed to make the metal shell completely clean.
Conductive milling: The conductive effect of the aluminum alloy shell after anodization will become worse. Therefore, it is necessary to remove the local anodized film and expose the metal to obtain a good grounding effect. It also requires another CNC treatment of milling the conductive site. .
Polishing: Polishing refers to the use of mechanical, chemical or electrochemical effects to reduce the surface roughness of the workpiece 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 marks and prepare for subsequent sandblasting.
