The comparative test was carried out under the production conditions, and the mold was lubricated and cooled by water-based graphite. Therefore, the life test is a direct and reliable method to judge the quality of different die steels.Determination of the heat-affected zone The heat-affected zone of the boss surface and the groove surface is measured by the microhardness method (load 50g). The heat load is much greater than that of the groove, because the boss is softened, so it is prone to plastic deformation. Comparison of mold usage The stress state of molds in actual use is extremely complicated, and it is difficult for the glass UV curing machine to describe it completely in the laboratory by simulation means..
Due to the slow loading and unloading speed of the press, the protruding part of the mold cavity is prone to plastic deformation failure, which is the main failure mode of the first speed gear mold and the reverse gear mold. From the measurement results, it can be seen that the difference in hardness between the boss surface and the groove surface is 9HRC
High hardness, high strength and high toughness metal materials. No residual stress and deformation caused by cutting force, no edge burrs. Castings can be obtained by combining molds such as children’s toy molds. The effective use of EDM machine tools is closely related to electrode manufacturing.
The production cycle is short, two or two days after there is a master mold, it is suitable for simple shape, precision and surface quality to create a ceramic layer, and then it can be obtained by drawing, spraying and firing. Save materials and investment. It can process compression molds, plastic molds, and plastic molds that have China Medical Accessories Mould Company low requirements for processing, with good fire resistance, high dimensional accuracy, and smooth surface. 3. EDM electrode processing EDM processing is one of the main processing methods of the current forming die cavity.
Many accessories, large area, high cost, easy to pollute the environment, can process cemented carbide, quenched steel, stainless steel, heat-resistant alloy, etc.The production efficiency is high, about 5 to 10 times that of EDM, and the productivity is not limited by machining accuracy and surface roughness. Long-term use of the electrode does not wear. The punch and the concave mold of the drawing die with poor processing accuracy and surface quality.. It has a low service life and is also used for large-scale and complex forming dies
medicalbucketmoulding
