Factors Affecting The Service Life Of Cold Stamping Dies
Cold stamping die convex, concave mold in the course of use, sudden appearance of breakage, breakage and cracks. Since the convex and concave molds of the mold are the parts that the mold is subjected to the maximum punching force during the stamping work, the convex and concave molds of the mold may be broken during the stamping process, and the main reason is that the heat treatment processing is improperly handled (hardened hard or If the hardness layer is too deep, the design gap is too small, etc., which will cause the convex and concave molds to be damaged, broken and broken. The rupture of the convex and concave molds of the mold, some local damage, we can continue to use after repair, and some of the damage is relatively large or completely damaged. It can only be repaired according to the design of the drawings. Use after the die.
Cold stamping die convex and concave molds have undergone shape deformation during use, which changes the geometrical shape of the processed product parts, which affects the dimensional accuracy and shape requirements of the machined parts. This is exactly the opposite of the case of fracture, mainly due to the insufficient quenching hardness of the convex and concave molds during the heat treatment or the shallowness of the quenching hardness layer, so that the convex and concave molds are geometrically deformed during the stress process.
The cold stamping die has a long time frequent friction between the convex and concave molds and the material to be processed, resulting in wear. Since the convex and concave molds rub against each other for a long time between the materials to be processed, large-scale blanking of the machined parts for a long time, the burrs of the punched parts are too large (the gap is too large), and the convex and concave gaps are too small, etc. An important reason for the wear of the convex and concave die edges. For example, the convex and concave die edges become dull, the corners become gardens, and the like.
The cold stamping die has a convex and concave die gap adjustment assembly unevenly, and the adjacent edges of the convex and concave die bite each other, causing the convex and concave die edges to be bruised. For example, when the mold is assembled, the position of the convex and concave molds is offset, and the gap is not uniform. When the mold without the guide is installed, the gap adjustment of the convex and concave molds is not suitable, and the convex and concave molds are bitten and damaged.