Inspection methods and standards for appearance defects of precision stamping parts

Precision stamping parts are widely used in automotive, electronics, medical and other industries. Precision stamping parts may be just a small part, but they have a great impact on the overall quality of the product. Therefore, the quality requirements for precision stamping parts are relatively high. The appearance defect affects the product appearance and use effect. So how to check the appearance defects of precision stamping parts? Inspection methods and standards for appearance defects of precision stamping parts: 1. Inspection method for material defects: visual standard, material strength does not meet the requirements, traces, overlaps, orange peel left by rolled steel plates , Streaks, loose galvanized surface, peeling of galvanized layer. 2. Inspection method for irregular rounded corners: visual inspection and inspection tool measurement of rounded corner radius is not even enough, not clear enough and smooth. Outer covering parts are not allowed. The rounded corners of some assembly surfaces and lap surfaces of inner covering parts not only affect the appearance of precision stamping parts, but also affect welding and assembly seriously. 3. Inspection method of pit bag: visual inspection. The existence of pits seriously affects the appearance quality of the covering parts after painting, which is a defect that customers cannot tolerate. Large-area pits will also affect the strength and fatigue of precision stamping parts and cannot be repaired. 4. Wrinkle inspection method: visually, the outer cover is not allowed to have any wrinkles that are easily noticeable by the customer, and the inner cover is not allowed to have serious wrinkles that may cause material overlap. 5. Inspection method for napping, indentation and scratches: visually, the outer surface of the outer covering is not allowed to have napping, scratches, and indentations; the inner surface of the outer cover is not allowed to have scratches and indentations that affect the quality of the outer surface. The surface of the inner cover is not allowed to have serious scratches and indentations that may cause the parts to crack. 6. Burr inspection method: visually, the length of the burr is required to be less than 10% of the thickness of the sheet. Any burr that affects the degree of adhesion of the welded edges is unacceptable. Any burr that can easily cause personal injury is unacceptable. Any punching burrs that affect the positioning and assembly of parts are unacceptable. 7. Inspection method for cracks: visually. Any chipping of the outer cover is unacceptable. For the inner cover parts, only minor cracks are allowed to be repaired by welding, but the repaired parts are not easy to detect and must meet the repair standards of precision stamping parts. 8. Inspection method for necking: visual inspection and dissection. Necking is a potential dangerous fracture point in the forming process of precision stamping parts, which has a vital influence on the function, strength and fatigue resistance of precision stamping parts. According to the degree of necking, it is judged whether the precision stamping parts are qualified, repaired, scrapped, etc. 9. Corrosion inspection method: visual inspection and dissection. Corrosion is the long-term storage or improper storage of precision stamping parts that leads to rust, which has a vital impact on the function, strength and fatigue resistance of stamping parts. The above content is about the inspection methods and standards for the appearance defects of precision stamping parts. I believe everyone has already understood. In the production process of precision stamping parts, some appearance defects may occur, which requires staff to inspect and repair to ensure that the precision stamping parts meet the usage standards and are qualified before they can leave the factory. Welcome to consult the telephone: