The process steps for using cutting tools are as follows:

Rough milling inner cavity: rough milling the inner cavity shape of the mobile phone shell, machining the inner cavity the positioning column combined with the fixture, which is very important for the subsequent processing.

Milling antenna slot: aluminum can shield (weaken) the radio frequency signal of mobile phone, so it must be slotted so that the signal can have an access path. Therefore, milling the antenna slot is the most important difficult step. The antenna slot must be milled evenly, the necessary connection points must be maintained to ensure the strength overall sense of the metal shell.

Finish milling of arc surface: 3D shaping of aluminum alloy body, usually milling out the arc surface contour with CNC machining center, which is also the most time-consuming process.

Finish milling side: the 3D arc surface of the metal fuselage is milled out by CNC, but there is still a circle of redundancy at the edge, so it needs to finish milling the side process, then you can see the rudiment of the metal shell.

Polishing: the CNC machine tool with high speed precision is used, but it can only achieve a1-a2 level finish. In order to meet the subsequent processing requirements, it needs to be polished to A0 level finish, which can be a mirror effect.

Highlight: the use of high-level ultra-high speed CNC machine tools to cut corners, this process is also known as drilling highlight processing.

Finish milling inner cavity: after multi-step processing of aluminum alloy, the metal shell has been formed, then the positioning column used for clamp locking other redundant materials are removed to make the metal shell completely clean.

Milled conductive potential: the conductive effect of the anodized aluminum alloy shell will be poor, so it is necessary to remove the local anodized film, expose the metal to obtain a good grounding effect, also need to go through another CNC treatment of milled conductive potential.

Polishing: polishing refers to the machining method of using the mechanical, chemical electrochemical effects to reduce the surface roughness of the workpiece, so as to obtain a bright flat surface. The conventional polishing process is mechanical polishing chemical polishing. The high-speed precision CNC machine tool is used for mechanical polishing to eliminate knife marks prepare for subsequent sandblasting.