Pyramid-type solid grinding tool for grinding metallic middle frame of mobile phone and preparation method

Abstract

The invention discloses a pyramid-type solid grinding tool for polishing a metallic middle frame of a mobile phone. The pyramid-type solid grinding tool comprises a soft substrate disposed on a bottomlayer, wherein a plurality of pyramids projecting upwardly and formed by curing a diamond slurry are arranged on the soft substrate; the diamond slurry is prepared from, by weight, 30-60 parts of diamond abrasive, 30-60 parts of photocurable adhesive, 20-40 parts of diluent, 0.5-5 parts of photoinitiator and 1-5 parts of adjuvant. The present invention employs intaglio printing and photocuring techniques to coat diamond slurry onto a mold having a pyramid structure, after photocuring, to a soft substrate to obtain a soft base diamond abrasive tool having a pyramid-type stereo structure a softsubstrate diamond grinding tool having a pyramid-type solid structure is obtained by coating a mold having a pyramid structure with the diamond slurry, performing photocuring, and transferring the diamond slurry subjected to photocuring to the soft substrate with intaglio printing and photocuring techniques, and the grinding tool can be applied to polishing operation in a high-strength metallic middle frame of the mobile phone, and the processing cost can be reduced on the basis of bringing convenience for processing, improving product polishing effect and increasing processing yield.

Description

technical field [0001] The invention relates to the technical field of high-strength metal mobile phone middle frame production, in particular to an abrasive tool used for grinding the metal mobile phone middle frame. Background technique [0002] In view of the demand for non-metal front and rear covers that will be adopted in the 5G era and the possible appearance of double-sided glass / ceramic / full-screen mobile phones, higher requirements are put forward for the mobile phone frame, and high-strength stainless steel middle frames are also a trend. Aluminum alloy has always been the main material of the middle frame of mobile phones, and its processing technology is relatively mature. However, with the rise of 3D glass and ceramic cover plates, the requirements for the strength of the middle frame are getting higher and higher. Stainless steel, steel and aluminum High-strength metals such as composite materials and titanium alloys are gradually gaining popularity; this type...

AI Technical Summary

Problems solved by technology

Aluminum alloy has always been the main material of the middle frame of mobile phones, and its processing technology is relatively mature. However, with the rise of 3D glass and ceramic cover plates, the requirements for the strength of the middle frame are getting higher and higher. Stainless steel, steel and aluminum High-strength metals such as composite materials and titanium alloys are gradually gaining popularity; this type of metal has excellent fatigue resistance and strength, but is also difficult to process, and it needs to be polished to reflect a good appearance

At present, the average yield rate of stainless steel and titanium alloys in the industry is only 30-40%, which greatly affects the popularity and wide-scale application of metal mobile phone middle frames

[0003] In order to improve the appearance of the metal mobile phone middle frame, it is necessary to polish the base shell of the metal mobile phone middle frame. During the grinding process, a grinding device must be used with abrasive materials. However, most of the existing grinding consumables have low grinding efficiency, short grinding life, Disadvantages of needing frequent replacement

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