[China Aluminum Industry Network] Low-temperature high-speed aluminum kneading skills: Low-temperature high-speed is the use of a lower aluminum bar temperature, faster kneading speed skills combination aluminum village kneading process. This aluminum profile skill is inversely proportional to the combination of temperature and speed, that is, the aluminum rod has a high temperature, the kneading speed is slow, the aluminum rod has a low temperature, and the kneading speed is fast. Under normal circumstances, the production of the upper mold is controlled by the temperature of the front rod at 420°C-440°C. When the temperature reaches the third rod, the cooling rate can be accelerated. It is better that the temperature of the flat rod is 390-420°C; the aluminum is divided. It is better to maintain the stick temperature at 410-440°C. When the aluminum rod reaches a good temperature, the kneading speed is determined according to the temperature of the discharge port, and the discharge port temperature is preferably 520-560°C. That is to say, when the outlet temperature is lower than the better temperature, it must be properly accelerated, and when it is greater than the good temperature, it must be decelerated properly. Together, it is necessary to ensure that the quality of the billet is acceptable. The low-temperature high-speed kneading skills will present two questions in the performance process. First, the quenching device is to meet the quenching skill requirements, and the qualified company is able to support the online quenching device, and the partition, graded air-cooling, spray, and water quenching Skills to reach the fundamental mechanical functions required for profiles. Second, in the high-speed kneading process, especially in the tail section, it is often accelerated due to the progress of the stick temperature followed by the kneading process. The metal will be overheated and burned. The appearance of the profile shows cracks and pulls, etc. many. The current general approach to deal with this question is to use liquid nitrogen to cool molds and reduce the temperature in the deformed zone to deal with the problem of deterioration of the quality of the blanks during rapid kneading, and then to increase the yield and ensure the implementation of low-temperature high-speed kneading techniques. . Isothermal aluminum kneading skills: Wenwenshengyi, the so-called isothermal kneading is the combination of temperature, kneading speed of the premise of insisting on the premise of the temperature of the discharge port. During the kneading process of the aluminum alloy kneading process, the temperature of the kneading material becomes higher and higher due to the heat generated due to the conflict between the ingot and the kneading tube and the kneading deformation, and the temperature difference between the aluminum kneading material is relatively large and the profiles are arranged along the length direction. The function is not uniform, if the kneading speed is too high in the middle and later stages of aluminum production, the appearance of the aluminum profile is simply cracked. In order to avoid this temperature rise, an isothermal kneading method has been proposed in which the temperature of the material outlet of the kneading material is always consistent during the aluminum alloy kneading process. The isothermal kneading method is particularly suitable for the production of hard aluminum alloys such as 2000, 7000 and some 5000 series with low critical kneading speed and some profiles with high appearance requirements (solar frame, polished profile, etc.). First of all, to implement the isothermal kneading first is a gradient heating operation system of aluminum rods, the temperature of the ingot heating is based on the temperature difference before and after the kneading material in the kneading process to determine the heating temperature gradient of the ingot. Ingot heating of the ingot induction furnace is usually divided into several zones along the length of the heating coil. The heating power in each zone is different. The front end of the ingot has high heating power and the back end heating power is low. Then the front temperature of the ingot is high and the back end When the temperature is low, the temperature gradient is usually 0-15°C/100mm. Long-ingot gas heating usually adopts a gradient cooling method after heating the ingot to make the ingot to form a high temperature gradient before and after the longitudinal direction. Secondly, the aluminum alloy kneading and deceleration control is gradually reducing the kneading speed in the middle and later stages of kneading to reduce the temperature rise of the kneading material. This deceleration control is usually used for kneading speed control of soft alloys. This control method evenly kneads faster than ordinary constant kneading speed. In addition, it is also possible to use the kneading tube partition heating method. The kneading cylinder is also provided with a cooling passage. Near the aluminum kneading mold inside the kneading tube jacket (or middle sleeve), some spiral grooves are provided, and the compressed air is kneaded in the middle and later stages to remove the heat of collision between the ingot and the kneading tube. , and then manipulate the temperature rise of the ingot.