What are the precautions for aluminum profiles in the stretching process?

　　What are the precautions for aluminum profiles in the stretching process? The following editor will explain to you:

1. Stretching must be done when the aluminum alloy profile is cooled to below 50 degrees before it can be moved to the stretching rack for stretching operations. If the temperature is too high, stretching will burn the human body and burn the top, but also because the aluminum cannot be completely eliminated. The internal stress of the alloy profile exhibits twists, twists, malfunctions and other absolute waste products before and after aging.

　　2. The stretching amount is controlled at 1%, and it should be noted that if the stretching amount is too high, head-to-tail scale errors will occur, water-like twist (fish scale) marks on the surface, low elongation, high hardness and brittleness (low plasticity). Too low a stretching amount will make the compression strength and hardness of the profile lower, and even aging (quenching) can not increase the hardness, and the profile is easy to bend and twist (commonly known as the big knife bend).

　　3. In order to control the amount of tensile deformation and the dimensional change of the entire profile very well, it is necessary to select a suitable special pad and a suitable method. Especially open material, circular arc material, cantilever material, and zigzag-shaped profiles should pay more attention to the reasonable and useful use of stretch clamps.

4. Pay attention to the stress of small feet, thin teeth, long legs, arc surfaces, inclined surfaces, openings, viewpoints, etc. of profiles with high width-to-thickness ratios, long overhangs, large arcs, large and thin wall thicknesses, strange shapes, etc. In order to avoid the occurrence of defects such as deformation, twisting and spiraling of the profile part or point scale.

5. Because the tops have the effect of heat resistance, the aluminum profiles with high decorative appearance must be flipped up and down to facilitate uniform heat dissipation and reduce the shortcomings of lateral bright spots that occur due to uneven heat dissipation, especially large widths. Face, thicker aluminum profiles should be paid more attention.

　　6. Do not rub, pull, stack, jam, or entangle each other during reclaiming, moving and stretching, and a certain interval should be reserved between each other. The aluminum alloy profiles that are prone to twists and turns and the length of the discharge should be disposed of in time, and if necessary, take care of each other.