What are the precautions in the drawing process of aluminum enclosure profile?
1. Stretching must be cooled to below 50 degrees and the aluminum enclosure profile can be moved to the stretching rack for stretching operations,
if temperature is too high that stretching will not only burn the body, burn the wool, but also appear zigzag, twist,
poor function and other absolute waste products because it can not completely eliminate the internal stress of extruded aluminum enclosure profile,
2.The tension is controlled at 1%, and attention should be paid to the middle-tail dimension error arise from excessive stretching,the appearance of water-lined twist (fish scale) mark, low elongation,
high hardness and brittleness (low plasticity).
Too low tensile will let strength and hardness of aluminum profiles on the low side, and even aging (quenching) can not improve the hardness,
the aluminum profiles easy to curve (commonly known as big knife bending).
3.In order to control the stretching deformation and the scale change of the whole strip, the suitable special cushion and suitable method should be selected.
Especially open material, arc material, cantilever material, and curved shape profile should pay more attention to the reasonable and useful use of stretching pads.
4.Pay attention to the force conditions of small feet, thin teeth, long legs, circular arc surface, inclined surface, opening, viewpoint of profile with high aspect ratio,
long suspended wall, large radian, wide wall thickness difference, strange shape, etc,to avoid the defects of deformation, twist, screw and so on.
5.As the heat-resisting effect of the wool strip, the aluminum enclosure profile with high demand for decorative appearance must be more upside down and upside down,
so as to facilitate uniform heat dissipation, reduce the transverse bright spot defect caused by uneven crystallinity of heat dissipation,
especially for the large width, the aluminum enclosure profile with thick wall should be paid more attention.
6.No rubbing, pulling, stacking, congestion, or entanglement in the process of taking material, moving and stretching,it should be allowed and certain intervals,
should be reserved for each other. Aluminum enclosure profile with easy bending and length of discharging should be disposed in time.
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