Preparation method of integrally formed stainless steel insert structure

Abstract

The invention relates to a preparation method of an integrally formed stainless steel insert structure. The preparation method comprises the following steps of first, carrying out machining on stainless steel powder to form a stainless steel outer frame insert blank according to a powder metallurgy technology; and second, carrying out CNC fine machining after carrying out forging and pressing on the stainless steel outer frame insert blank to form a stainless steel outer frame. The preparation method of the integrally formed stainless steel insert structure has the advantages that a cell phoneshell structural part which is integrally formed by the stainless steel powder metallurgy outer frame, a cast aluminum middle frame and a plastic assembly structure is implemented; and because a powder metallurgy forming structure part outer frame structure is adopted, the working rate and the use rate of stainless steel are increased, and the appearance effect of stainless steel is achieved.

Description

technical field [0001] The invention relates to a manufacturing method of a mobile phone shell structure, in particular to a manufacturing method of an integrally formed stainless steel insert structure. Background technique [0002] Because stainless steel has good hardness and mechanical strength, it is an ideal material for preparing mobile phone casings. Various mobile phone manufacturers have adopted such solutions, but due to the following constraints: [0003] 1. The melting point of stainless steel is high, and the pressure of die-casting is high, so the mold and equipment are difficult to bear. The precision and complex structural parts cannot usually be produced by the die-casting process, but must be prepared by extruding or forging blanks through CNC machining, resulting in a large cost. Improve and greatly reduce the efficiency, currently only the middle frame of Apple and other mobile phones use this processing method; [0004] 2. On the other hand, the powder...

AI Technical Summary

Problems solved by technology

[0003] 1. The melting point of stainless steel is high, and the pressure of die-casting is high, and the mold and equipment are difficult to bear. Precision and complex structural parts usually cannot be produced by die-casting technology, but must be prepared by extrusion or forging blanks through CNC machining, resulting in a large cost Improvement and efficiency are greatly reduced. At present, only the middle frame of mobile phones such as Apple adopts this processing method;

[0004] 2. On the other hand, powder metallurgy stainless steel molding, because the process requires degreasing and sintering processes, the product has low precision and large deformation, and is only suitable for small and simple product structures, which limits its application in mobile phone casings

[0005] 3. Due to the high hardness and high strength of stainless steel, CNC machining is very difficult, and during CNC machining, a hardened layer will be formed on the surface due to the high temperature of the CNC tool and the stainless steel surface, which further increases the difficulty and cost of stainless steel machining.