In the era of Industry 4.0, machine vision detects screw/nut defects

      With the development of the Industry 4.0 era, the production of parts for the market is becoming more and more precise, while labor costs are increasing, labor efficiency and stability are not high, and the rate of false detections and missed detections is high. In the current market, detection methods based on machine vision have been introduced. The detection principle is to take pictures with a CCD camera and perform image analysis with software. This method is efficient, high-speed and non-contact detection.

For example, screws and nuts have extremely strict quality requirements. Moreover, screws and nuts are generally used in large quantities and are generally produced in large quantities. At this time, manual appearance inspection cannot be handled at all, so optical image inspection equipment can only be used. Conduct quality inspections.

The implementation process is as follows:

1. Collect images → image preprocessing → contour matching → position correction → thread detection → data judgment → numerical display. As shown in the picture below, using our self-developed software, we can easily detect that the number of turns of the screw is 5.

Summary: In visual inspection, the processing process generally includes image input, image positioning, inspection tools, and output results. In this case, the image positioning tool is contour matching and position correction, the detection tool is thread detection, and the result is the number of turns of the thread.

In the process of application, you must flexibly use the combination of various tools to achieve integration and practice makes perfect.

How to use machine vision positioning to detect defects in screws and nuts online

Features of screw and nut appearance inspection equipment:

1. The detection efficiency can reach 300-1200/minute

2. The detection accuracy can reach up to ±0.02mm

3. Detection accuracy can reach 99.9%

4. Automatic loading and unloading, no manual operation required.

Appearance inspection equipment is equipment specifically designed to inspect the appearance of products. For example, product appearance size, defects, defects, scratches, burrs, stains, deformation, etc.

In today's industrial production and manufacturing, due to the limitations of science and technology, manual inspection methods are still mainly used to detect defects on the surface of products. Due to manual limitations and backward technology, this method is not only slow and inefficient in inspecting products, but also has low efficiency during inspection. It is easy to make mistakes during the process, which leads to unqualified test results. If you want to know more about machine vision solutions , you can call the hotline for consultation: 028-62705808  Ms. Wu