Quality inspection standards and control points for metal sheet metal processing

In modern manufacturing, it directly affects the performance, appearance, and service life of products. Strictly following quality inspection standards and accurately controlling the production process are the key to ensuring the quality of metal sheet metal processing. ​
 
The quality inspection standards for metal sheet metal processing involve multiple dimensions. In terms of dimensional accuracy, according to different product requirements, the national standard stipulates that the linear dimensional tolerance is generally controlled between ± 0.1mm and ± 1mm, and precise measurements need to be made using tools such as vernier calipers and micrometers; For critical dimensions such as aperture and slot width, tolerance requirements are more stringent. Surface quality inspection cannot be ignored. The sheet metal surface should be free of defects such as cracks, scratches, and indentations. The surface roughness should meet the design requirements, and a combination of visual inspection and roughness measurement is usually used. Structural strength is also an important standard, and the mechanical properties of sheet metal parts are tested through tensile and bending tests to ensure that they have sufficient strength and toughness in practical use. ​
 
And in terms of quality control points, it needs to run through the entire production process. Raw material control is the source, strictly inspecting the material certification and specification parameters of metal sheets to ensure they meet design requirements and avoid quality hazards caused by material problems. The control of the machining process is crucial. In the cutting process, it is necessary to regularly calibrate the cutting equipment and control the cutting accuracy; In the bending process, it is necessary to accurately adjust the bending angle and force according to the material and thickness of the board to prevent rebound deviation. The finished product testing process adopts a combination of full inspection and sampling inspection, conducting 100% testing on key dimensions and appearance quality, and conducting mechanical performance testing on mass-produced products through sampling. In addition, establishing a sound quality traceability system can quickly locate the production process and take timely improvement measures once quality problems are discovered. ​