Machining method for titanium mobile phone shell or titanium alloy mobile phone shell

Abstract

The invention discloses a machining method for a titanium mobile phone shell or a titanium alloy mobile phone shell. The machining method comprises the following steps of (1) board blanking, (2) heating, (3) forging and performing, (4) welding, (5) heating, (6) first-time forging, (7) CNC excess material milling, (8) sand blasting for oxidation layer removing, (9) heating, (10) secondary finish forging, (11) edge cutting and burr removing, (12) sand blasting for oxidation layer removing, (13) stress relief annealing under vacuum and (14) CNC finish machining. According to the machining method for the titanium mobile phone shell or the titanium alloy mobile phone shell, raw material input can be saved, the technology is simple, the production efficiency is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of surface treatment agents, in particular to a method for processing titanium or titanium alloy mobile phone shells. Background technique [0002] The metal material used in traditional mobile phone cases is mostly aluminum alloy. With the advent of the 5G era and the improvement of people's requirements for the aesthetics of mobile phones, metal aluminum can no longer meet the functional design requirements of mobile phones due to factors such as signal interference and poor texture. And the psychological needs of consumers, so a new alternative material must be sought to make mobile phone cases. Titanium alloy has become the most important metal material for mobile phone cases in the 5G era because of its high specific strength, biophilicity, good sound permeability and good metal texture, and also symbolizes high-end atmosphere and other identity characteristics. [0003] The mobile phone case has compl...

AI Technical Summary

Problems solved by technology

From the perspective of manufacturing process, mobile phone cases can usually be produced by direct CNC processing of plates, 3D printing or casting methods, or through CNC processing to produce finished products. Conventional free forging or die forging methods are difficult to form mobile phone case forging blanks

[0004] Compared with aluminum, titanium alloy has high specific strength and poor thermal conductivity. Therefore, when CNC machining is used, the metal is easy to stick to the knife, the cutting speed is slow, the tool loss is serious, and the production efficiency is extremely low, which is far from being compared with aluminum.

When the mobile phone case is produced by direct CNC processing of the plate, the processing cycle of a single mobile phone case is about 10-20 hours, and the mobile phone market has a large capacity. Although there are many CNC equipment in domestic mobile phone foundries, under this production efficiency, still It is far from meeting the market demand; at the same time, when the plate is directly processed, most of the material needs to be cut off eventually, the finished product rate of machining is less than 50%, and the material utilization rate is very low. However, the price of titanium alloy material is high, and the cost of raw material is high. In addition, CNC processing The tool is different from the tool for metal aluminum, the tool loss is serious, and the cost of consumables is high

The 3D printing or casting method is near-net shape. Although this method can significantly improve the utilization rate of materials, the parts prepared by these methods are bound to have visible external defects such as pores and sand holes; and the surface is rough, CNC processing The difficulty is still high, and the production efficiency has not been significantly improved; the products produced by this method have poor comprehensive mechanical properties and large anisotropy; so this method is still impossible to become an industrial production process for mobile phone cases.

Therefore, it is necessary to develop a new preparation process, and at the same time solve the problem of titanium alloy CNC machining efficiency and production cost, otherwise it will inevitably restrict the large-scale use of titanium alloy on mobile phone cases

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