Causes and Elimination of Arc Defects in Aluminum Profiles
[Chinese aluminum industry network] generally refers to the profiled aluminum alloy profiles with arcs. Arc profiled aluminum profiles produce arc deflections in the form of aluminum extrusion dies, which can be caused by extrusion of aluminum profiles. In addition: the mold discharge qualified and extrusion deformation in the arc failed. Can also be able to die out of the aluminum profile extrusion and extrusion through various calibration methods and more qualified. In addition, the production method of making the extrusion arc of the aluminum extrusion die out of tolerance in order to obtain a more qualified end and the operation of the process is simple.
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cause:
(I): The flow rate at the arc is caused by the speed or the uneven flow velocity at the same plane of the arc surface.
(b): Arc design preload (angle) is not caused.
(C): The error in the design of the mold causes arcs to become large and small, unstable, or excessively large in circularity when subjected to pressure and pressure relief.
(d): The arc surface is subject to its own structure and the weight is limited to deformation in the extrusion.
(E): Arc deformation after arc extrusion cold deformation.
(6): Deviation of circularity caused by stretching.
(7) The local deformation arc after the weight is loaded is not good enough.
In practical production, in order to deal with arc cold shrinkage using the arc cooling shrinkage produced by rapid cooling and natural cooling, and the stress contraction during straightening, the arc of the outlet profile is often larger than the actual arc size value. The general 60mm arc diameter control is about 1.0mm, the amount of discharge above 60mm needs to be determined according to the actual conditions of aluminum alloy profiles, but generally it will not exceed 3.0mm. Excessive volume will be orange peel if the surface is qualified after stretching. Circular material is relatively taboo. The arc surface of most industrial aluminum alloy profiles is a high surface requirement. Due to the astigmatism characteristic, the bad side of the arc surface can be clearly reflected! Each circular arc section must be dimensioned to prevent overdosing.
Elimination method:
(A): Produce qualified and quality aluminum extrusion die!
(b): Pay attention to the effect of the discharge table on the arc of aluminum profiles.
(C): pay attention to the size of traction and the control of the amount of stretching.
(d): Pay attention to the position of the arc on the aluminum profile to prevent deformation, bending, scratching, and scratching.
(E): If the material is bent, pay attention to the spacing between the profiles on the storage cooler.
(6) Pay attention to the effect of cooling wind on the arc and hardness of aluminum alloy sections.
(seven): Please stand empty when installing the frame.
Experience:
Pay attention to the strength and method when moving (dragging) arc aluminum profiles, and try to rely on mechanical transmission to prevent hard bending and scratching! Do not place arcs face down in any process. Do not allow stacking together!
Attachment: The angle between the vertical and horizontal tangent angles of cut-cut aluminum profiles is generally required by customers of general industrial aluminum profiles. The cut-off degree within 0.5 degrees must be fine sawed on special equipment. The aluminum profiles with this requirement are basically to cut the net size, so please pay attention to the accuracy of the length of the cut length when using the fine saw! 
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