Middle frame shaping equipment and middle frame shaping method for electronic product

Abstract

The invention discloses middle frame shaping equipment and a middle frame shaping method for an electronic product. The equipment comprises an upper mold plate and a lower mold plate; a middle frame blank part is shaped when the upper mold plate and the lower mold plate are assembled; the equipment further comprises upper pressure needle arrays which are distributed at the bottom of the upper moldplate, and / or lower pressure needle arrays which are distributed at the top of the lower mold plate; and the upper pressure needle arrays and / or the lower pressure needle arrays comprise a pluralityof columnar pressure needles which are arranged in a spaced manner so as to provide a plurality of dispersed stress contact points for the shaped middle frame blank part. The middle frame shaping equipment and the middle frame shaping method for the electronic product achieve a good shaping effect on a middle frame product and are high in precision and relatively low in cost.

Description

technical field [0001] The invention relates to a frame shaping device and a shaping method for an electronic product. Background technique [0002] With the development of the mobile phone industry, consumers have put forward higher requirements for the hand feel, drop resistance, corrosion resistance and appearance of mobile phones. Among them, the metal mobile phone middle frame has become more and more mainstream due to its unique characteristics. At present, the commonly used methods for the middle frame of metal mobile phones are: (1) The whole aluminum alloy, stainless steel plate, etc. are processed by CNC. And processing efficiency is low, and cost is high. (2) The general shape of the middle frame is forged by forging, and the subsequent CNC processing is characterized by reducing the CNC machining allowance and improving production efficiency compared with method (1). The disadvantage is that the forging accuracy is poor and the CNC processing volume is still rel...

AI Technical Summary

Problems solved by technology

At present, the commonly used methods for the middle frame of metal mobile phones are: (1) The whole aluminum alloy, stainless steel plate, etc. are processed by CNC. And the processing efficiency is low and the cost is high

(2) The general shape of the middle frame is forged by forging, followed by CNC processing, which reduces the CNC machining allowance and improves production efficiency compared with method (1). The disadvantage is that the forging accuracy is poor and the CNC processing volume is still relatively large.

(3) Some low-melting point alloys are formed by die-casting, and then processed into a middle frame by CNC. It is characterized by low cost and easy mass production for some low-melting point alloys, but the surface density of processed products is not enough, and segregation is easy to occur. Microstructure The uniformity is poor, and the appearance cannot meet the requirements after treatment

Reshaping of the MIM middle frame has always been a difficult problem in the industry, because the size of the middle frame blank is large, the structure is complex, and the structural deformation after sintering is not directional, and the deformation is basically wavy or irregularly twisted, which makes it difficult to maintain the middle frame blank after shaping. To achieve the ideal structural effect

[0006] Now most of the products produced by the MIM shaping process adopt two methods of cold shaping and hot shaping after sintering. The traditional cold shaping is to use overpressure impact on the deformation direction of the product after sintering to increase the pressure on the deformed structure surface of the product. A physical method that deforms the surface of the product in the opposite direction under strong pressure. Its disadvantage is that it is not suitable for products with large volume. During the shaping process, the surface of the product will bear a huge pressure. Elasticity, leading to plastic failure

Another thermal shaping method is to use heat to remove stress and maintain pressure shaping on the sintered product. The disadvantage of this method is that the shaping process is complicated, the precision is low, and it is not suitable for mass production. product performance

[0007] The cold shaping method cannot control the deformation of the middle frame of the mobile phone well. In the process of solving the compression deformation, the middle frame cannot maintain a regular shape, the problem of pressure rebound cannot be well solved, and good results cannot be obtained.

[0008] The thermal shaping process is complicated and costly, and it is not suitable for products with high precision, and the heating process affects the internal performance of the product. This method has great limitations.

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