Precautions for Stretching Led Aluminum Profile Shell

Precautions for stretching led aluminum profile shell
1. During the process of picking, moving and stretching, the aluminum profile shell shall not rub, pull, overlap, squeeze and wrap with each other, and there should be a certain interval. The flexible aluminum profile shell and discharge length should be dealt with in time, and should be protected from each other if necessary.
2. Pay attention to the force of small feet, fine teeth, long legs, curved surfaces, inclined surfaces, openings, angles, etc. Profiles with high aspect ratio, wall length, large radian, wide wall thickness and peculiar shape to prevent local or point-like dimensional deformation, twisting and spiral defects of the profile.
3. Since the top has the function of preventing heat dissipation, the aluminum profile shell with high decorative surface requirements must be turned up and down to facilitate uniform heat dissipation and reduce the horizontal bright spot defects caused by uneven heat dissipation and different crystallinity, especially wide and thick walls. Aluminum profile housing.
4. When the aluminum profile shell is cooled below 50 degrees (can be grasped with bare hands), the industrial aluminum profile shell can be moved to the stretching frame for stretching work. If the temperature is too high, stretching will not only burn the human body and the top, but also cause bending, twisting and poor performance before and after aging because the internal stress of industrial aluminum alloy profiles cannot be completely eliminated.
5. In order to control the tensile deformation and better control the size of the entire profile change, appropriate special fixtures and appropriate methods should be used. Especially for opening materials, curved materials, cantilever materials, and curved profiles, more attention should be paid to the rational and effective use of tensile fixtures. When necessary, someone should control the centralizer or limiter in the middle of the stretched profile to ensure that the stretched size between the head, middle and tail meets the requirements of industrial aluminum alloy profiles.
6. The stretching amount should be controlled at about 1%. In the straightening profile of 25M Wuxi aluminum profile shell, the stretching degree should be stretched about 25CM, but not more than 2%. In production, it should be adjusted according to the actual situation of aluminum profile shell extrusion and various special requirements (opening size, surface quality, outer diameter, inner diameter, wall thickness, elongation, etc.). Among the conflicting technical requirements, we seek to meet specific requirements for the amount of stretch. Excessive stretching will lead to head-to-tail size deviation, water surface distortion (fish scales) traces, low elongation, and high brittleness (low plasticity). If the stretching amount is too low, the compressive strength and hardness of the profile will be very low, and even aging (quenching) will not increase the hardness, and the profile is easy to bend (commonly known as broadsword bending).