What is the quality standard of the solder joints in the welding of stamping parts?

In the processing of metal stamping parts, some small parts need to be welded to be formed. What are the quality requirements and standards for the solder joints during welding? Let’s briefly talk about spot welding; 1. First look at the appearance quality of the solder joints. , The surface of the solder joints is round or elliptical. The number, location, and size of the solder joints should meet the requirements of the product process and drawings. The solder joints should be visually free of cracks, pores, desoldering, overburning, burn-through, etc.; 2 , Depth of indentation; not more than 20% of the thickness of the plate. If the thickness ratio of the two workpieces is greater than 2:1, the depth of indentation can be increased to 20%~25%, and any indentation should be polished; 3. Straight solder joints Degree: The difference between the straightness of the welding point and the left and right displacement is not more than 3mm; 4. The penetration rate in the welding of metal stamping parts is 30% to 80%; 5. The welding points must be evenly distributed when welding the stamping parts, and the distance between the welding points The difference is ±5mm and must not be accumulated. When a solder joint pitch cannot meet the requirements (the pitch is too large or too small), it needs to be adjusted to ensure that the solder joints are evenly distributed; 6. The number of solder joints meets the requirements of the 'Welding Standard Operation Guide' for the station. The document stipulates that when the number of points on a certain welding edge is 5 or less, no defective solder joints or few solder joints are allowed. 7. If a welding edge is allowed to have two or more defective solder joints, then there should be at least one good solder joint interval between the defective solder joints to be considered qualified, and the solder joints at the end of the weld cannot be defective; 8. If an abnormal solder joint is found, record the abnormal state on the corresponding solder joint, record the result on the inspection record sheet, and execute the welding quality problem handling process; 9. If the defective solder joint exceeds the total number 1% of the stamping parts is also counted as unqualified. Related news: the characteristics of the main materials of stamping parts, the treatment of common problems of stamping parts, the characteristics of scaffolding stamping parts and the importance of inspection, the advantages of metal stamping parts introduce the advantages, procedures and characteristics of stamping parts