1. Stretching must be cooled in the aluminum alloy profile to below 50 degrees before moving to the stretching frame for stretching operations. If the temperature is too high, stretching will burn the human body and the tops, and because aluminum cannot be completely eliminated The internal stress of the alloy profile shows absolute waste such as twists, twists, and poor function before and after aging.
2. The amount of stretching is controlled at 1%, and it should be noted that too much stretching will cause head, middle and tail scale errors, water-like twist marks on the surface, low elongation, high hardness and brittleness (low plasticity). Too low stretching amount will make the compressive strength and hardness of the profile low, and even the aging (quenching) will not improve the hardness, and the profile is easy to bend.
3. In order to control the amount of tensile deformation and very good control of the size change of the entire profile, a suitable special clamp and a suitable method should be selected. In particular, the opening material, arc material, cantilever material, and zigzag shape profile should pay attention to the reasonable and useful application of the stretch clamp.
4. Pay attention to the stress of small feet, thin teeth, long legs, arc surfaces, inclined surfaces, openings, viewpoints, etc. on profiles with high width-to-thickness ratios, long cantilever walls, large arcs, huge wall thicknesses, and strange shapes. Conditions, to avoid the profile part or point scale deformation, twisting, spiral and other shortcomings.
5.Because the wool top has the effect of heat resistance, the aluminum profile with high decorative appearance must be turned upside down and up and down in order to dissipate heat evenly and reduce the shortcomings of lateral bright spots caused by uneven heat dissipation and uneven crystallinity, especially large width. Surface, thicker aluminum profiles should pay more attention.
6. Don't rub, pull, stack, jam or entangle each other during the process of reclaiming, moving and stretching, and leave a certain interval between them. Dispose of aluminum alloy profiles that are prone to twists and turns, and perform maintenance and disposal if necessary.
