Precautions for the stretching process of aluminum profile housing
With the rapid development of electronic products, the shell, as the protective packaging for electronic products, has a wide variety of materials. The most popular one is the aluminum profile shell. It is based on the conventional titanium plating process and adds pre-plating and electroplating process steps. The aluminum profile process involves placing the activated plated parts in a water solution of salt and hydrochloric acid for chemical treatment. It can be processed into various forms of gold, colored, black and other bright series of aluminum profile products. The following points should be noted in the stretching process of aluminum profile shells. Our aluminum profile shells have excellent corrosion resistance aluminum profile housing. And it has extremely high recyclability, meeting the ecological development concept of energy conservation and environmental protection!
Pay attention to the force conditions of the small feet, thin teeth, long legs, arc surfaces, inclined surfaces, openings, and viewpoints of profiles with high width-to-thickness ratios, long hanging walls, large arcs, significant differences in wall thickness, and strange shapes, to avoid partial or point-scale deformation, twisting, and spiraling defects of the profiles.
Because the wool strips have a heat-blocking effect, aluminum profiles with high decorative surface requirements must be turned up and down and front and back frequently to ensure uniform heat dissipation and reduce the problem of horizontal bright spots caused by uneven heat dissipation and inconsistent crystallinity. This is especially important for large-width and thick-walled aluminum profile housing.
During the processes of taking materials, moving and stretching, they must not touch, pull, stack, jam or tangle with each other. A certain distance should be reserved between each other. Aluminum alloy profiles that are prone to bending and have long discharge lengths should be dealt with in a timely manner. If necessary, proper maintenance and treatment should be carried out between them aluminum profile housing.
The stretching of aluminum profile shells must be carried out only when the aluminum alloy profiles have cooled to below 50 degrees Celsius before being moved to the stretching frame for the stretching operation. If the temperature is too high, the stretching will not only burn the human body and the wool strips, but also fail to completely eliminate the internal stress of the aluminum alloy profiles, resulting in bending, twisting, and poor performance and other defective products before and after aging aluminum profile housing.
The stretching amount should be controlled at around 1%, and it should be noted that if the stretching amount is too high, it will cause dimensional errors at the head, middle and tail, water streaks (fish scale) marks on the surface, low elongation, high hardness and brittleness (low plasticity). Too low a stretching amount will cause the compressive strength and hardness of the profile to be relatively low. Even aging (quenching) cannot increase the hardness, and the profile is prone to arc-shaped bending (commonly known as "big knife bending").
To control the tensile deformation of the aluminum profile shell and to effectively manage the dimensional changes of the entire profile, appropriate special clamps and suitable methods should be selected. Especially for open materials, arc materials, cantilever materials, and profiles with tortuous shapes, more attention should be paid to the reasonable and effective application of tensile clamps aluminum profile housing.
