Glass defect detection device

Abstract

The invention belongs to the field of product defect detection, and particularly relates to a glass defect detection device. The device comprises a main rack body, a transfer unit, an illumination unit, an imaging unit, an image acquisition unit, a data processing unit, a control unit and a rotation adjusting mechanism, wherein the rotation adjusting mechanism is arranged on the main rack body; the illumination unit and the image acquisition unit are arranged on the rotation adjusting mechanism, and the rotation adjusting mechanism adjusts the mutual position relationship between the illumination unit and the image acquisition unit, so that the image acquisition unit can perform bright and dark field conversion according to detection requirements. Various lighting schemes as well as imaging lenses and linear array cameras at different angles are integrated in one detection position, so that various defect detection requirements can be met, detection efficiency is improved, and the device is applicable to pipeline working places. The device is low in error reporting rate, high in detection precision and capable of working stably for a long time, a large quantity of labor resources are saved, and therefore, the device has broad application prospect.

Description

Technical field [0001] The invention belongs to the field of product defect detection, and in particular relates to a variety of defect detection devices for cell phone cover glass. Background technique [0002] As people have higher and higher requirements for product quality, appearance quality has become an important factor for consumers to choose electronic products. Mobile phone cover glass is a kind of tempered glass. Tempered glass is also called tempered glass, which is a kind of prestressed glass. Generally, chemical or physical methods are used to form compressive stress on the glass surface. When the glass is subjected to external forces, the surface pressure is first offset, thereby increasing the bearing capacity. Therefore, tempered glass is widely used in mobile phone screens, architectural doors and windows, glass curtain walls, electronic meters and other fields. In the production process of tempered glass, a metal fixed support needs to be placed on the upper su...

AI Technical Summary

Problems solved by technology

In the production process of tempered glass, it is necessary to place a metal fixed support on the upper surface of the glass to ensure the parallelism of the glass. However, due to the different material properties of the glass material and the metal fixed support, the expansion coefficients of the two are very different, resulting in tempering. After finishing, the flatness and thickness of the glass itself are difficult to ensure consistency, and it is very easy to produce chipping, bumps, white spots, crushing, scratches, missing teeth, IR black and white spots and other defects on the surface of the tempered glass after processing and manufacturing. The existence of various defects on the glass surface not only affects the appearance of products such as mobile phone cover glass, but also directly affects the performance of mobile phone cover plates when the defects are serious. Therefore, how to quickly, efficiently and intelligently temper mobile phone cover glass, etc. The detection of glass surface defects is not only related to the development of enterprises, but also of great significance to all related industries

[0003] For the detection of tempered glass defects, the traditional method is mostly direct identification by human eyes. This detection method has low detection efficiency and high labor intensity. Manual work for a long time can easily cause visual fatigue, resulting in low detection accuracy. Although it has appeared in the market one after another A variety of related testing equipment, but the existing testing equipment has a complex structure, high manufacturing costs, and a high error rate for product internal defects, hole edge defects and side defect detection

More importantly, the current detection equipment has a single detection function, and it is impossible to conduct all-round detection of all defects of the product to be inspected. When faced with multiple defect detection requirements, you can only purchase a variety of detection equipment, which needs to occupy a large area of ​​measurement space. The detection site has high requirements, and a lot of manpower is wasted, and the detection efficiency is very low

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