What are the contents of appearance defect detection of electronic components?

Date：2021-11-16 13:54:47Views：1600

With the continuous development of intelligent manufacturing technology, the appearance defect detection of most artificial products can be realized through artificial intelligence technology. Due to the disadvantages of slow detection efficiency and low detection accuracy, the visual detection of surface appearance defects can better replace the traditional detection methods. In the production process of electronic components, complex process treatment is required. Under multiple process treatment, various problems will appear, such as surface defects, unclear characters and so on. Any product will produce some poor appearance during production, and electronic components are no exception. So, how to check the appearance quality of electronic components? What are the contents of appearance defect detection of electronic components?

When identifying and testing electronic components, the following operations shall be carried out:

1. Check that the model, specification, manufacturer and place of origin of components must meet the design requirements, and the outer packaging must be intact.

2. The electrode leads of electronic components shall be free from crimping and bending, and the coating shall be intact and smooth without oxidation and corrosion.

3. Check whether the appearance of electronic components must be intact, whether there are defects such as depression, scratch and crack on the surface, and whether the components with coating on the outside must be free of falling off and scratch.

4. The model and specification marks on electronic components shall be clear and complete, the color code position and color shall meet the standards, and the characters on the integrated circuit shall be carefully checked.

5. The size of components of mechanical structure shall be qualified, the thread shall be flexible and the rotation feel shall be appropriate.

6. Switch components operate flexibly and feel good; The connector shall have proper tightness and good contact.

The components in various electronic products have their own characteristics. During inspection, the inspection contents shall be determined according to the specific requirements of each component.

Application of appearance defect detection in electronic components:

1. Connector appearance inspection: measurement of pin diameter, pin distance and other dimensions.

2. Pin pin appearance inspection: pin spacing, offset, shortage, etc.

3. Appearance inspection of resistor: scar, crack, scorch, dimension measurement, etc.

4. Appearance inspection of capacitor: overall dimension of capacitor, pin diameter, etc.

5. Appearance inspection of inductor: measure the length, width and other dimensions, and detect surface defects.

6. Transformer appearance inspection: measure the pin diameter, pin distance, row distance and other dimensions, and detect the appearance defects such as desoldering, scorching and poor pins.

7. Wafer size and appearance defect detection: wafer size measurement, accuracy ± 0.001mm, wafer positive and negative coaxiality detection.

8. IC tray one-dimensional code detection: read multiple one-dimensional codes on the product, compatible with products of different sizes, with a diameter of 177mm ~ 326mm, generate a one-dimensional code according to the format, connect with the printer, print and label, and connect the read code with the MES system.

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