Method of preparing metal casing

Abstract

The invention discloses a manufacture method of a metal shell, comprising the steps of blanking, providing roughcast, rolling the roughcast by a rolling die, thus obtaining a pre-forming body and precise-milling the pre-forming body, thus obtaining the metal shell with unequal thickness. By adopting the manufacturing method, the metal shell produced has high hardness, good wearability and good surface quality sensing.

Description

technical field [0001] The invention relates to a manufacturing method of a metal casing. Background technique [0002] Along with the raising of people's living standard, portable electronic devices such as mobile phone, PDA (personal digital assistant, personal digital assistant), MP3 and palmtop computer enter people's life and work in a large number, bring convenience and fun to people. At present, people not only require powerful functions for the above-mentioned various electronic devices, but also hope that they have a beautiful appearance and a good surface texture. Therefore, the casing material, surface processing accuracy and roughness of portable electronic devices are highly required. [0003] The casings of existing portable electronic devices are mainly made of plastic and metal, and the thickness of the center of the casings of many portable electronic devices is different from that of the surrounding areas. Plastic shells with equal thickness are relatively...

AI Technical Summary

Problems solved by technology

When adopting the method of above-mentioned multiple milling pins, its processing time is long, generally as long as more than ten hours when processing an ordinary mobile phone casing for example, so its production efficiency is low, and the processing cost of milling pins is higher, so improve manufacturing cost of electronic devices

In the process of multiple milling, a large amount of material is milled from the blank and becomes waste, which also increases the manufacturing cost on the other hand.

In addition, in the prior art, there is also a manufacturing method for forming metal shells of unequal thickness. In this method, the metal plate is first stamped into the shape of the shell blank, and then the shell blank is processed into a metal shell of unequal thickness by milling. However, this method still requires a long milling time, and the stamping equipment is bulky and noisy. In addition, if there is a special-shaped part with an irregular shape on the shell, it cannot be formed by stamping, and the special-shaped part needs to be separated. After processing, it is combined with the shell by welding, so the production efficiency is low

In addition, the unequal-thickness metal shells manufactured by the above two methods of manufacturing unequal-thickness metals are relatively weak in strength because the shell material has not been strengthened during the processing process, which is not conducive to improving the service life of the metal shell. To make the metal shell have better strength, it is necessary to choose a material with higher strength or thicken the shell thickness, which will increase the cost, and thickening the shell thickness will inevitably increase the volume of the metal shell, which is not conducive to Housing miniaturization

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