CNC prototype factory analysis of the basic process of steel mold processing in plastic mold accessories

Analysis of CNC prototype factory the basic process of steel mold processing in plastic mold accessories the selection of mold heat treatment method and processing technology should also be based on the working conditions and failure mode of the mold and different requirements for performance. The heat treatment equipment should be continuously improved, the heat treatment process should be improved, the strength and toughness of the materials should be optimally matched, and the heat treatment process should be strictly followed to control the heating temperature, time and cooling speed, so as to ensure the performance of the mold. Shenzhen tuowei plastic mold accessories merchants explain the processing technology of V3N steel molds 1. Forged V3N steel contains a large amount of primary carbide and secondary carbide, which, if retained in the quenching tissue, will dramatically reduce all the life of the mold. Only by changing the forging of raw materials and crushing the carbide can it be distributed in the steel base with a small and uniform shape to improve the overall mechanical properties. The thermal conductivity of V3N steel is poor. When the forging blank is heated, it should be fully warmed up. The initial forging temperature is 1170 ℃, and the final forging temperature is 950 ℃. The equipment can be 250 (Small pieces) And 400kg air hammer, began to use a light hammer to play quickly, with a heavy hammer in the middle, and finally played gently. After forging, the asbestos powder box was slowly taken out for annealing. 2. After the forging, the heat can be annealing for 4 hours by means of annealing or ordinary 860oC. After mechanical processing and forging, the hardness is high. After using the temperature or ordinary annealing, the machine can be successfully added. After quenching, because the hardness is high, the workpiece is difficult to form and grind, it can be grinding with a grinding wheel made of NB-corundum plus chromium. 3. Heat treatment process V3N steel in 1220 ~ When quenching at 1230 ℃, due to the presence of unmelted Carbide, the hardness is low, and the quenching temperature is insufficient; In 1260 ~ When quenching at 1270 ℃, the grain is obviously too large and the system is overheated. Choose 1230 ~ The quenching and heating temperature at 1240 ℃ can not only fully dissolve the carbide and alloy elements into the middle of the ingot, but also maintain a fine grain (10 ~ Level 10). V3N super-hard high speed steel mold parts adopt 1220 ~ After tempering at 1230 ℃ four times at 550 ℃, the hardness can be controlled at HRC64 ~ 67, the specific size can be adjusted from the heat treatment process according to the size of the part, to achieve the ideal combination of hardness and strength, V3N super hard high speed steel after quenching there are more residual steels, according to the determination of about 25% ~ 30%, it is necessary to eliminate the reduction as much as possible. For this reason, many high-temperature tempering is carried out to make the transformation of the Mars. After four high-temperature tempering, most of the residual steels have undergone a transformation of the first phase, resulting in a secondary hardening effect. The secondary hardening effect temperature of V3N steel is 30 ~ higher than that of ordinary high speed steel ~ This feature is valuable at 40 °c, indicating that V3N steel has a higher red hardness. 4. After the deep cold treatment after finishing, due to the transformation of the residual ferrite to marinate and the precipitation of ultra-fine carbide, the hardness and wear resistance of the mold parts will be further improved, and the wear resistance can be increased by 40%, it not only shortens the tempering time, saves energy, but also significantly improves the service life of the mold. The process of deep cooling treatment of high speed steel molds is: oil removal of molds & rarr; Put in the thermos tank & rarr; small number of times into liquid nitrogen (-196 °c)& Rarr; Soak 2. 5h & rarr; Take out the mold and put it into 60 ~ 70 ° C hot water.

The global market was valued at rapid aluminum prototyping in cnc machining prototype service and is expected to reach a market value of 3d printing and rapid prototyping by 3d printing prototype service, with a CAGR of vacuum casting process in rapid prototyping during the forecast period.
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