The principle, structure and key technology of the intelligent inspection system for the shape and s

Door and window hinges play a crucial role in the quality and safety of modern buildings. The use of high-grade stainless steel in hinge production ensures durability and reliability. However, the traditional production process using stamping and the poor manufacturability of stainless steel often lead to quality dispersion and lower precision during assembly. The current inspection methods, relying on manual inspection using tools like gauges and calipers, have low accuracy and efficiency, resulting in higher defective product rates and impacting enterprise profits.

To address these challenges, an intelligent detection system has been developed to enable rapid and precise detection of hinge components, ensuring manufacturing accuracy and improving assembly quality. The system follows a structured workflow and utilizes machine vision and laser detection technologies for non-contact and accurate inspection.

The system is designed to accommodate the inspection of over 1,000 types of hinge products. It combines machine vision, laser detection, and servo control technologies to cater to various specifications of parts. A linear guide rail and servo motor drive the movement of the material table, allowing the workpiece to be positioned accurately for detection.

The workflow of the system involves feeding the workpiece to the detection area, where two cameras and a laser displacement sensor inspect the dimensions and flatness of the workpiece. The detection process is adaptable to workpieces with steps, and the laser displacement sensor moves horizontally to obtain objective and accurate data on flatness. The detection of shape and flatness is completed simultaneously as the workpiece passes through the inspection area.

The system incorporates machine vision inspection techniques to measure the total length of the workpiece, the relative position and diameter of the workpiece holes, and the symmetry of the workpiece hole relative to the width direction of the workpiece. These measurements are crucial for ensuring the quality and functionality of the hinges. The system applies sub-pixel algorithms to further improve detection accuracy, achieving a detection uncertainty of less than 0.005mm.

To simplify operation and parameter setting, the system classifies workpieces based on the parameters that need to be detected and assigns them a coded barcode. By scanning the barcode, the system identifies the type of workpiece and extracts the corresponding detection parameters from product drawings. The system then performs visual and laser detection, compares the results with the actual parameters, and generates reports.

The application of the detection system has proven its ability to ensure precise detection of large-scale workpieces despite limited machine vision resolution. The system generates comprehensive statistical reports within minutes and allows for interoperability and interchangeability on inspection fixtures. It can be widely applied to the precision inspection of hinges and other similar products.

AOSITE Hardware's Hinge products are highly valued for their high density, thick leather, and good flexibility. These hinges are not only waterproof and moisture-proof but also durable, making them ideal for use in various applications in modern buildings.