Three problems in stamping die

Stamping is one of the practical processes for mass production of parts. Only handle these pivot points accurately. Affect the product delivery cycle. The smooth production of stamping processing has a direct impact on production efficiency and cost. In the stamping production process, the mold causes the most problems, and it is the most important factor in the entire stamping production element. Mold problems are mainly concentrated in mold damage, product quality defects and mold sharpening, which have long plagued the industry's production. Die failure is the most common problem in stamping production, which often causes production stoppage and affects the product production cycle. Therefore, the cause of mold failure must be found as soon as possible, and reasonable repairs must be made. 1 Mold damage Mold damage refers to mold cracking, breaking, expanding, etc. To deal with mold damage, it is necessary to find the reason from the mold design, manufacturing process and mold use. If foreign matter enters the mold, overlapping parts, and waste obstruction are not handled in time, and the processing and production are inherited, the blanking plate, punch, lower template and guide post of the mold will be easily damaged. If the design of the spring force is too small or the equal height sets are not equal, the spring will break and the blanking plate will tilt. Cause overlapping punching and damage parts. If the quenching temperature of the mold is too high, the quenching method and time are not fair, and the number of tempering and temperature, and the elbow is not properly selected, it will cause the mold to be damaged after it enters the stamping production. Improper fixing of the punch or insufficient screw strength. It can cause the punch to fall or break. The working height is adjusted too low and the guide post is insufficiently lubricated. Generally, the heat treatment process of the mold material has a great influence on it. The size or depth of the blanking hole is not designed enough to easily block the slot hole and cause damage to the blanking board. When the mold is used, the position and direction of the parts are installed incorrectly or the bolts are not fastened. 2 The main reasons for the jamming caused by the jamming are: the mold orientation is incorrect and inclined. Otherwise, the failure will be enlarged and the mold will be damaged. Cause mold deformation, such as mold base, template hardness, thickness design is too small, easily deformed by external force; the mold position is not installed correctly, the positioning error of the upper and lower molds is out of tolerance. At this time, the strength of the punch should be improved, and the guide protection of the discharge plate should be enhanced. Or the accuracy of the press is too poor, causing the mold to interfere; the strength of the punch is not enough, the size of the punch is too close, and the lateral force of the mold is unbalanced. In the stamping process, once the mold clamping is inflexible or even stuck, it is necessary to immediately stop production, find out the cause of the stuck mold, and eliminate the fault. 3 Die damage and high cost of repairing the die produced by stamping. Usually mold costs account for 1/5 to 1/4 of the total cost of the parts. The one-time repair cost of the electric flat car exceeds 70% of the original cost of the die, or the die life is near. When the mold repair technology is too complicated and the mold repair cost is too large, the difficulty will inevitably make the repair cycle too long, which will severely affect the normal production of stamping. You should choose to fail and scrap in advance and re-manufacture the mold. Generally speaking. After the mold is damaged, there is a choice of maintenance and scrapping. but. Therefore, timely maintenance of molds to prevent mold damage can greatly reduce mold costs for stamping production. When the hub of the mold is severely damaged, sometimes the convex and concave molds are damaged at the same time. This is due to the difficulty and high cost of mold manufacturing. The non-natural wear failure of the stamping die, such as the destruction of non-hub parts. Under normal circumstances, the main form of failure of stamping die is excessive wear. From the new mold manufacturing and delivery. Until the burrs of the punched parts exceed the standard, the size and shape accuracy of the parts are out of tolerance, and the mold can no longer be repaired or has no repair value at all, the mold can only be scrapped. From the use of new molds to the failure to discard them. 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 inspections