The glass cover of the mobile phone is attached to the surface of the touch screen of the mobile phone, and the purpose is to protect the screen of the mobile phone and beautify the product. The glass cover of the mobile phone needs to go through a number of special processes in the manufacturing process. Therefore, it is required to have a very high precision and a reliable lighting effect for detecting surface defects of the product.
The process of production and processing of mobile glass cover mainly includes: opening and opening → carving → grinding → cleaning → polishing → detection → strengthening → mold opening → UV transfer → coating (PVD) → printing (screen printing / spraying) → radium Carving → inspection → fitting → packaging, etc. 3D glass needs to be polished after the first grinding.
The carved glass is edging the blank glass by the engraving machine wheel groove to remove the remaining amount; the glass material is chamfered and drilled by the drill bit, and the shape and the camera hole are finished by the fine grinding wheel to meet the final product requirements. . Processing accuracy of 0.01mm.
The strengthening is carried out by using a high-purity potassium nitrate solution and a mixed catalyst, and is generally tempered at a high temperature of 4-6 hours at 450 °C. The principle is that potassium ions and sodium ions on the surface of the glass structure are ion exchanged to form a strengthening layer. The hardness can reach 7H, which improves the anti-scratch and anti-shock ability of the glass. From the production process requirements of the glass cover of the mobile phone, at least two inspections are required: one appearance defect and size inspection after the engraving and polishing; after the reinforcement, there is a stress release extension curve, and the appearance and size detection should be performed again.
Large target high pixel camera and high resolution dual telecentric lens imaging system
Optical design of parallel light paths
Measurement accuracy 0.005mm
The specific content of the mobile phone glass cover appearance detection includes:
-- Surface inspection: stain detection, scratch detection, edge missing detection, crack detection, color discrimination detection;
-- Dimensional inspection: gap detection, size detection, shape detection, aperture detection, distortion detection, etc.
-- Appearance defect detection: shell inspection, machine vision inspection
With the rapid growth of the manufacturing industry, product quality issues have become increasingly prominent. Ordinary manual testing can no longer meet the requirements of consumer quality. This system introduced by Shenzhen Ruishi Special Technology Co., Ltd. can help manufacturers to measure high-precision parts of various shapes and sizes on the assembly line; detect surface defects detected by human eyes.
Advantages of machine vision inspection:
1. High precision, fully automated, objective and non-contact;
2. Fast, real-time, accurate and efficient.
3. Simple installation, convenient operation and expandability.
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Function
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