Gaobu metal stamping parts, why does the stamping die burst when stamping + 20,000 sets of mold production experience

The technical staff of the manufacturer responsible for the production of Gaobu metal stamping parts said that due to different stamping processes and different working conditions, the reasons for mold bursting are many. Next, Xiaoshuo will comprehensively analyze the causes of die burst based on the design, manufacture and use of the die, and make corresponding changes.　　The mold material is not good, and it is easy to break during the subsequent stamping process. Die life of different materials is often different. For this reason, two basic requirements are put forward for the materials of die working parts: 　　 (1) The use performance of the material should have high hardness (58-64HRC) and high strength, and have high wear resistance and sufficient toughness, and heat treatment deformation is small , Has a certain degree of thermal hardness; 　　 (2) Good process performance. The processing and manufacturing process of die working parts is generally more complicated. Therefore, it needs to have adaptability to various processing techniques, such as forgeability, machinability, hardenability, hardenability, quenching crack sensitivity and grinding workability, etc. .　　 heat treatment: improper quenching and tempering process produces deformation. Practice has proved that the hot stamping processing quality of the mold has a great impact on the performance and service life of the mold. From the analysis and statistics of the causes of mold failure, it is known that 'accidents' of mold failure caused by improper heat treatment account for more than 40%.　　 (1) Forging process: This is an important link in the manufacturing process of mold working parts. For high-alloy tool steel molds, technical requirements are usually put forward for the metallographic structure of the material carbide distribution.　　 (2) Preliminary heat treatment: Annealing, normalizing or quenching and tempering should be used according to the different materials and requirements of the mold working parts to change the structure, eliminate the structural defects of the forging blank, and change the stamping process. High-carbon alloy die steel undergoes appropriate preliminary heat treatment, which can eliminate the network secondary cementite or chain carbides, spheroidize and refine the carbides, and promote the uniformity of carbide distribution, which is beneficial to ensure quenching and recovery Fire quality, improve mold life.　　 (3) Quenching and tempering: This is the key link in the heat treatment of the mold. If overheating occurs during quenching and heating, it will not only cause greater brittleness of the workpiece, but also easily cause deformation and cracking during cooling, which will seriously affect the life of the mold. Special attention should be paid to preventing oxidation and decarburization during the quenching and heating of the die, and the heat treatment process specifications should be strictly controlled. When conditions permit, vacuum heat treatment can be used. After quenching, it should be tempered in time, and different tempering processes should be adopted according to technical requirements.　　 (4) Stress relief annealing: After rough machining, the mold working parts should be subjected to stress relief annealing. The purpose is to eliminate the internal stress caused by rough machining, so as to avoid excessive deformation and cracks during quenching. For molds with high precision requirements, they need to undergo stress relief and tempering treatment after grinding or electrical machining, which is conducive to stabilizing the precision of the mold and improving the service life.　　The flatness of the mold grinding is not enough, and it will be deformed during press processing. The surface quality of the working parts of the mold has a very close relationship with the wear resistance, fracture resistance and adhesion resistance of the mold, which directly affects the service life of the mold, especially the surface roughness value has a great influence on the life of the mold. If the surface roughness value is too large, stress concentration will occur during work, and cracks will easily occur between the peaks and valleys, which will affect the durability of the die, and the corrosion resistance of the workpiece surface, which directly affects the service life of the die For this reason, you should pay attention to the following: 　　 (1) During the processing of mold working parts, it is necessary to prevent the phenomenon of grinding and burning to the surface of the part. The grinding process conditions and process methods (such as grinding wheel hardness, particle size, coolant , Feed and other parameters); 　　 (2) During the stamping process, it is necessary to prevent macro defects such as tool marks, interlayers, cracks, and impact scars on the surface of the mold working parts. The existence of these defects will cause stress concentration and become the root cause of fracture , Resulting in early failure of the mold; 　　 (3) The use of grinding, grinding and polishing and other finishing and fine processing to obtain a smaller surface roughness value and improve the service life of the mold. Hardware, 15 years of focus on Gaobu metal stamping parts, 5000 square meters production workshop, hundreds of precision processing production equipment, more than 20 Ru0026D and design engineers, monthly mold processing capacity of 100+ sets and daily production capacity of 3 million punching times, stamping accuracy can be Up to 0.01mm, 16 quality inspection layers are strictly checked. It can quickly solve the urgent problem of time when choosing hardware stamping processing, solve the problem of stamping accuracy, and solve the problem of production quality. 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