(1) ingredients: according to the specific alloy grades that need to be produced, calculate the addition amount of various alloy components and match all kinds of raw materials reasonably. (2) smelting: the prepared raw materials are added to the melting furnace according to the process requirements, and the impurity and gas in the melt are effectively removed by means of degassing, slag removal and refining. (3) casting: under certain casting conditions, the molten aluminum is cooled and cast into round casting rods of various specifications through the deep well casting system.
1, the stretching must be carried out on the stretching frame when the aluminum profile is cooled to less than 50 degrees. If the temperature is too high, the stretching will not only damage the human body and the sliver, but also show twists and turns, twisting, malfunction and other absolute waste products before and after aging because the stress in the aluminum alloy profile can not be completely eliminated. 2. The control of the amount of stretch is about 1%, and it should be noted that if the amount of stretch is too high, it will cause head-to-tail scale error, appearance watery twist (fish scale) marks, low elongation, high hardness and brittleness (low plasticity). Too low drawing amount will make the compressive strength and hardness of the profile on the low side, and even aging (quenching) can not improve the hardness, the profile is easy to arc zigzag (commonly known as broadsword bending). 3. In order to control the tensile deformation and the scale change of the whole profile, suitable special cushions and suitable methods should be selected. In particular, the opening material, arc material, cantilever material, and zigzag shapes should pay more attention to the reasonable and useful use of stretch pads. 4. Pay attention to the stress conditions of small feet, thin teeth, long legs, circular surfaces, inclined surfaces, openings, viewpoints, etc., of profiles with high width-to-thickness ratio, long wall length, large Radian, wide difference in wall thickness, strange shape, etc., to avoid the shortcomings of partial or point-like scale deformation, twisting, helix and so on. 5. Because of the heat-blocking effect of the sliver, the aluminum profiles with high decorative appearance must be flipped back and forth to facilitate uniform heat dissipation and reduce the shortcomings of transverse bright spots due to uneven crystallinity, especially the wide surface. Aluminum profiles with thick walls should be paid more attention to. 6. Do not rub, pull, stack, jam or entangle each other in the process of material taking, moving and stretching. There should be a certain distance between each other. Aluminum alloy profiles that are prone to twists and turns and discharge length should be disposed of in time and maintain and dispose of each other if necessary.
