With the rapid development of electronic products, the shell as a protective packaging for electronic products, the types of materials are also very wide, the popular to count the aluminum profile shell, which is based on the conventional titanium plating process to increase the pre-plating and electroplating process steps, aluminum profile process is the activation of the plated parts placed in an aqueous solution of salt and hydrochloric acid for chemical treatment; can be processed into various forms of gold, color, black and other bright a variety of series of aluminum profile products.
1, stretching must be cooled to less than 50 degrees before moving to the stretching frame for stretching operation, the temperature is too high that stretching will not only scald the human body, scald the hair strips, but also present the scrap products such as zigzag, twist and twist and poor function before and after aging because the internal stress of the aluminum alloy profile cannot be completely eliminated.
2, the amount of stretching is manipulated at 1%, and we should pay attention to the fact that too high stretching amount will lead to head, middle and tail scale errors, watery twist (fish scale) marks, 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 aging (quenching) can not improve the hardness, and the profile is easy to curved bending (commonly known as big knife bending).
3, in order to manipulate the amount of tensile deformation and very good control of the scale change of the whole profile, we should choose the appropriate special clip pad and suitable way and method. Especially the open material, circular material, cantilever material, and zigzag shape of the profile should pay attention to the reasonable and useful use of the stretching clip pad.
4、Pay attention to the force conditions of small feet, thin teeth, long legs, circular arc surface, inclined surface, opening and viewpoint of profiles with high width-thickness ratio, long overhanging wall, large curvature, wall thickness disparity and strange shape, etc., so as to avoid the occurrence of shortcomings such as partial or point-like scale deformation, twisting and screwing and spiral of profiles.
5, because of the effect of heat resistance emitted by the hairline, the aluminum profiles with high demand for decorative appearance must be turned up and down before and after more often, so as to facilitate uniform heat dissipation and reduce the horizontal bright spot shortcomings that occur due to uneven crystallization of heat dissipation, especially the large wide surface and thick wall aluminum profiles should pay more attention.
6, in the process of taking material and moving and stretching shall not touch each other, pulling, stacking, congestion, winding together, and shall leave a certain interval between each other. The aluminum alloy profiles that are easy to bend and the length of the material should be disposed of in time, and if necessary, make the maintenance disposal between each other.
