The life of stamping die is affected by many factors, and there are also many ways to extend its life.
Stamping die material is one of the key factors that determine the life of stamping die. High-quality materials have higher hardness, wear resistance and toughness, and can better resist wear and deformation during stamping. For example, for drawing dies, the use of GT35 steel-bonded carbide can effectively reduce the tendency to bite and significantly extend the life of stamping die. Therefore, when designing stamping die, the most suitable material should be selected according to the specific use environment and requirements.
The heat treatment process has a profound impact on the performance and service life of stamping die. Through reasonable heat treatment, the hardness, wear resistance and anti-bite ability of stamping die can be improved, but at the same time, attention should be paid to avoid excessive hardening and reduced toughness. Quenching and tempering are the key links in the heat treatment of stamping die. It is necessary to strictly control the heating temperature, holding time and cooling method to ensure that the stamping die obtains the best organizational structure and performance. In addition, stress relief annealing is also an indispensable step, which can eliminate the internal stress generated by stamping die during processing and improve the stability and service life of stamping die.
The design structure of the stamping die also has an important impact on its life. Reasonable design should ensure that all parts of the stamping die are evenly stressed to avoid stress concentration and excessive wear. For example, when designing the punch, attention should be paid to guide protection and support; when designing relatively weak parts, arc transition should be used to avoid stress concentration. In addition, the reasonable selection of the gap of the stamping die is also an important consideration for extending the life. Too small or too large a gap may cause the wear of the stamping die to increase.
Stamping process parameters such as stamping speed and punching force will also affect the life of the stamping die. Excessive stamping speed and excessive punching force will accelerate the wear and deformation of the stamping die. Therefore, appropriate process parameters should be selected according to the specific material and stamping die conditions. At the same time, reasonable layout and overlap design can also reduce the wear of the stamping die and increase its service life.
The use and maintenance of the stamping die are also important links in extending its life. During use, the depth of the punch entering the die should be strictly controlled to avoid excessive wear. At the same time, lubrication is also key, which can reduce friction resistance and reduce the wear of the stamping die. When the stamping die is stored, care should be taken to protect the cutting edge from damage, and the die should be repaired and the cutting edge should be ground when necessary.
The surface treatment of the stamping die can also increase its service life. For example, the hardness and wear resistance of the stamping die surface can be improved by using surface strengthening treatment methods such as liquid carbonitriding and ion nitriding. In addition, the use of surface strengthening treatments such as high-frequency quenching, hydraulic pressure, and shot peening can also generate compressive stress on the stamping die surface and improve its fatigue strength.
The manufacturing accuracy and quality of the stamping die directly affect its service life. High-precision stamping dies can better maintain the stability of shape and size during the stamping process and reduce wear and deformation. Therefore, in the manufacturing process of stamping die, the processing accuracy and surface quality should be strictly controlled to ensure that the stamping die meets the design requirements.
The life of the stamping die is affected by many factors, but the service life of the stamping die can be effectively extended by reasonable selection of materials, optimization of heat treatment process, improvement of design structure, selection of appropriate process parameters, strengthening of use and maintenance, surface treatment, and improvement of manufacturing accuracy and quality.
