What are the appearance defects of metal stamping parts

After the metal stamping parts are processed, the stamping processing plant needs to carry out quality inspections on the metal stamping parts, and they can be shipped only after passing the inspection. The quality inspection of stamping parts is mainly appearance inspection, so how do we identify whether there are defects in the appearance of a stamping part? Precision-For more than 10 years, we have been committed to customized processing services for precision metal stamping parts. Next, we will analyze how to define the defects of a metal stamping part. 1. Discoloration of metal stamping parts: the background color or expected color changes, or the color of the stamping part itself is inconsistent; 2. Rainbow effect: galvanizing may cause discoloration or 'rainbow' effect; 3. Stamping parts are exposed to the air In the process, chemical reactions such as rust and oxidation will occur; 4. Indentation: due to the scratches of sharp objects, the dents formed on the surface of the metal stamping parts; 5. The uneven thickness of the electroplating layer causes ripples or stripes on the surface of the parts. -Like defects; 6. The oil stains generated during the manufacturing process stay on the surface of the stamping parts; (not cleaned) 7. All foreign objects on the painted surface or the surface of the stamping parts, such as spots, sand, etc.; 8. Dimples: metal stamping The pit-like defects on the surface of the part; 9. Forming traces: the processing traces formed by the mold on the surface of the stamping part during processing and forming. [Related recommendation] Learn more: What are the methods for polishing the surface of stainless steel? Learn more: Manufacturing characteristics of automobile stamping parts molds Learn more: Points to note in the design of continuous stamping dies (2)