Precision molds are those that fulfill all eight of the process performance requirements. At the Heju Precision Metal Stamping Factory, the high-precision tolerance of electronic stamping parts is 0.01mm, and the manufacturing of precision molds typically involves going through a number of processes such as forging, cutting, and heat treatment.
Forgeability is characterized by a low resistance to hot forging deformation, good plasticity, a wide forging temperature range, a low tendency toward forging cracking, cold cracking, and the precipitation of network carbides, and wide forging temperature range.
It is possible to obtain a deep hardened layer after hardenability quenching, and it can be hardened by employing a mild quenching medium. Additionally, the likelihood of quenching deformation and cracking is minimal after hardenability quenching. Conventional quenching has a low sensitivity to cracking, is insensitive to quenching temperature and workpiece shape, has a relatively small loss of grindable grinding wheel, allows for a large amount of grinding without hitting a burn limit, is insensitive to grinding casting services wheel quality and cooling conditions, and is not susceptible to abrasion and grinding cracks. The following list provides an overview of the four distinguishing features of precision molds. When the wear-resistant blank is plastically denatured inside the mold cavity, the wear-resistant blank flows and slides along the surface of the cavity. This causes severe friction between the surface of the cavity and the blank, which ultimately leads to the failure of the mold as a result of wear. In general, the wear and tear on the mold parts is reduced and the wear resistance is improved proportionally to the hardness of the mold parts. In addition, the wear resistance is correlated with the type of carbides present in the material, as well as the quantity of carbides, their shape, size, and distribution.
Fatigue Fracture PerformanceIn the course of the mold's working process, when subjected to the prolonged action of cyclic stress, it frequently results in fatigue fracture.
The mold's performance with regard to fatigue fracture is primarily determined by its strength, toughness, and hardness, in addition to the amount of inclusions present in the material. When the mold's performance at high temperatures is improved, the mold's hardness and strength will decrease. This will lead to early wear of the mold or plastic deformation. Therefore, the materials that go into precision metal molds need to have a high level of resistance to tempering in order to guarantee that the mold has a high level of hardness and strength when it is being used.
The grinding process, used for the processing of precision mold parts
Accessories for molds are either the mold parts or components that are reinstalled after the mold has been damaged. Mold accessories can also refer to the parts or components that are used to assemble the mold. The quality of the molded products is directly impacted by the process parts. The longevity of both the precision mold and the product that is formed has a connection to the process of precision machining.
When processing precision mold parts using grinding, it is necessary to control a large number of technical parameters, including deformation, internal stress, shape tolerance, and dimensional accuracy of the parts. The operation is more difficult in the specific production practice; however, thanks to Dongguan Shili and their 15 years of experience in precision machining, we are able to summarize and analyze aluminum casting the methods that can be used for reference:1. The majority of businesses that specialize in the processing of precision mold parts prioritize the control of the processing process as a means of improving both the processing effect and the economy. Surface grinders, internal and external cylindrical grinders, and tool forming grinding machines are the three primary varieties of machine tools that are utilized in the grinding stage of the processing of precision mold parts. During the finishing grinding process, it is essential to exercise stringent control over the occurrence of grinding deformations and grinding cracks, including microscopic cracks on the surface of the workpiece; if this is not done, the imperfections will gradually become visible in the work that comes after. Choose components that have a machining allowance of cooling liquid medium that is as close to 0 as possible.
When the grinding wheel is passivated, it will slide, score, and squeeze on the surface of the workpiece. This will result in burns, microscopic cracks or grooves on the surface of the workpiece, which will have a significant impact on how the workpiece is utilized in the future. decrease in usefulnessIt is difficult to process long and thin plate parts because they are so thin. The majority of the work that is done on disc and plate parts is done with a surface grinder. Following grinding, the piece of work was deformed, but it quickly returned to its original shape when the original stress was applied. The flatness cannot meet the requirements of precision mold part processing as a result of the deformation recovery. The quantity ought to be on the low side, and the datum plane is finished by performing multiple passes.
