The quality control of grid production is crucial, as it relates to engineering safety and quality. The specific requirements are as follows:
Raw material control: Strictly select suppliers of steel and other raw materials to ensure their complete qualifications and good reputation. When each batch of materials enters the site, carefully check the quality certification documents and rigorously verify the specifications, models, chemical composition, mechanical properties, and other indicators. At the same time, conduct a visual inspection to check for defects such as cracks and rust, and if necessary, commission a third-party inspection. Only after passing the inspection can it be used.
Processing process control: In terms of welding, welders must hold a certificate to work. Before batch welding, trial welding specimens must be made and process evaluation must be conducted. After welding, use an ultrasonic flaw detector to inspect the interior of the weld seam, and use magnetic particle inspection to detect surface defects. Parts processing must strictly follow the design dimensions and use high-precision equipment to control dimensional deviations. During assembly, repeatedly calibrate the reference line and positioning of steel components to ensure assembly accuracy.
Strict inspection of finished products: After the grid is formed, the overall structural dimensions are comprehensively reviewed. Perform a full coverage inspection on the weld seam again to ensure its quality. For surface rust removal and painting, professional samples are used to test the rust removal grade and roughness, coating thickness gauges are used to measure thickness, and the scratch method is used to measure paint adhesion. Only products that have passed all inspections can leave the factory, and unqualified products will be immediately reworked.
Complete management system: Establish and improve the quality management system, clarify the quality responsibilities of each department and position. Strengthen employee quality training, enhance professional competence and quality awareness. Keep good quality records and traceability, so that problems can be quickly identified and resolved, continuously improving product quality and enterprise competitiveness