What are the causes of defects in metal stampings? Hardware stamping refers to the die for steel/nonferrous metal and other plates, which is formed into the specified shape by the pressure machine to provide the required processing pressure under room temperature. What are the causes of defects in metal stamping parts? The specific contents are as follows:
Common defects of metal stamping parts include the following 9 categories: cracking, lamination, wave, galling, deformation, burr, lack of material, size discrepancy, pit, bag and crush. The causes of metal stamping scrap are analyzed from five aspects: human, machine, material, method and ring.
1. The quality of raw materials for metal stamping is poor, such as uneven thickness and hardness, inaccurate size of shear plate or strip;
2. The installation, adjustment and use of the metal stamping die are improper, such as the limit column is not stuck, and the die is not completely closed during the stamping production.
3. The hardware stamping operator did not correctly feed the stamping strip along the positioning or did not ensure that the strip was fed according to a certain gap;
4. Due to long-term use, the metal stamping die has clearance changes or its working parts and guide parts are worn;
5. The installation positions of the metal stamping die are relatively changed due to the looseness of the fastening parts due to the long impact and vibration time;
6. The hardware stamping operator was negligent and did not operate according to the operating procedures
7. The quality management system is not perfect, or the quality inspection personnel do not carry out the patrol inspection on time, and the sampling inspection timely discovers the abnormal defects.
8. The punch is out of repair for a long time, and the accuracy is insufficient. The parallelism of the upper and lower platens decreases or the punching force decreases.
Post time: Dec-13-2022