Low-temperature high-speed aluminum extrusion process and method
Low-temperature and high-speed aluminum extrusion process: Low-temperature and high-speed is to use the process combination of the absorbed aluminum rod temperature and the extrusion speed to perform the extrusion process of aluminum profiles. Normally, the temperature of the first rod produced by the upper mold is controlled at 420°C-440°C, and the temperature can be accelerated when the third rod is reached. The temperature of the flat mold aluminum rod is kept at 390~420°C; the split mold aluminum It is best to keep the rod temperature at 410~440℃。
When the aluminum rod reaches the optimal temperature, the extrusion speed is determined according to the temperature of the discharge port, and the temperature of the discharge port is best 520~560℃. Then, when the temperature of the discharge port exceeds the optimal temperature , it should be appropriately accelerated, and when the temperature is greater than the optimal temperature, it should be appropriately decelerated. At the same time, it is necessary to ensure that the quality of the output blank is qualified.
There are two problems in the implementation of the low-temperature high-speed extrusion process. One is whether the quenching device meets the requirements of the quenching process. If conditions permit, the enterprise can install the online quenching device, partitioning and grading for air cooling, spraying, and water spraying. , Is to achieve the basic mechanical properties required by extruded profiles. Second, in the high-speed extrusion process, especially the tail section, the rod temperature often rises rapidly due to the gradual extrusion process, and the metal will be overburned. The general method to solve the problem of the surface of the profile is basically to use liquid nitrogen cooling Mold technology to reduce the temperature of the deformation zone to solve the problem of the deterioration of the surface quality of the blank during rapid extrusion, thereby increasing the yield and ensuring the implementation of the low-temperature high-speed extrusion process.
When the aluminum rod reaches the optimal temperature, the extrusion speed is determined according to the temperature of the discharge port, and the temperature of the discharge port is best 520~560℃. Then, when the temperature of the discharge port exceeds the optimal temperature , it should be appropriately accelerated, and when the temperature is greater than the optimal temperature, it should be appropriately decelerated. At the same time, it is necessary to ensure that the quality of the output blank is qualified.
There are two problems in the implementation of the low-temperature high-speed extrusion process. One is whether the quenching device meets the requirements of the quenching process. If conditions permit, the enterprise can install the online quenching device, partitioning and grading for air cooling, spraying, and water spraying. , Is to achieve the basic mechanical properties required by extruded profiles. Second, in the high-speed extrusion process, especially the tail section, the rod temperature often rises rapidly due to the gradual extrusion process, and the metal will be overburned. The general method to solve the problem of the surface of the profile is basically to use liquid nitrogen cooling Mold technology to reduce the temperature of the deformation zone to solve the problem of the deterioration of the surface quality of the blank during rapid extrusion, thereby increasing the yield and ensuring the implementation of the low-temperature high-speed extrusion process.