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The punching and flanging of stamped parts are generally prepared for the next step of tapping or other processes. In the general process of flanging and turning holes, a series of problems such as rupture, burrs, and deformation often occur. How does the stamping factory deal with this problem?
1. The Metal Stamping parts have cracked holes.
This phenomenon mainly occurs at the cross-section, where the force points are concentrated and prone to burrs, and is also affected by the raw materials of the board. Therefore, it is advocated to use materials with good expansion performance and thin thickness, and to increase the aperture as much as possible during design, which can help alleviate the phenomenon of flipping holes and cracking. When designing convex molds, use spherical curvature, add touch area, swap the direction of pre holes and flip holes, convert the possible location of burrs, and reduce cracking.
2. The hole opening of the stamped part shrinks.
Irregular hole openings can make riveting difficult. As for the analysis of the reasons, stamping factories can find that the gaps in the concave convex mold are the source of the problem, causing the material to rebound. The standardized approach is to adjust the mold gaps to be slightly smaller than the material thickness to ensure the vertical viewing point during stamping. 
3. Lack of flipping height for metal stamping parts.
The lack of hole height can easily lead to the phenomenon of cutting corners, shortening the riveting depth of screws, and affecting the connection performance. Therefore, precision metal stamping processing factories that cooperate for a long time will promptly detect the problem, increase the flipping hole height in a timely manner, or thin the hole wall thickness to increase the hole height.
4. The structure of the metal stamping die does not match.
Due to the misalignment of the mold structure and damage to the material, it is easy for the material to break and jump onto the groove, causing the phenomenon of punching and cutting waste. The negative impact is that it may cause unevenness on the surface of the product, resulting in defective products, making after-sales processing difficult and consuming manpower and resources.
This article is from EMAR Mold Co., Ltd. For more EMAR related information, please click on www.sjt-ic.com,
