What should be paid attention to when using the drawing process in the processing of aluminum parts?

What should be paid attention to when using the drawing process in the processing of aluminum parts?

1. The stretching amount of aluminum parts is controlled at 1%, and it should be noted that if the stretching amount is too high, head and tail scale errors will occur, the appearance has traces of water pattern distortion (fish scales), low elongation, high hardness and low brittleness (plastic). If the tensile amount is too low, the compressive strength and the hardness of the profile will be low, and even aging (quenching) cannot improve the hardness, and the profile is easy to bend (commonly known as a big knife).

2. In order to control the tensile deformation of aluminum parts and control the size of the entire section very well, it is necessary to select suitable special clamping pads and appropriate methods. Especially opening materials, arc materials, cantilever materials and curved shape profiles should pay attention to the rational and useful use of tensile clamps.

3. Pay attention to the high processing thickness ratio of aluminum parts, the long hanging wall, the large radian, the difference in wall thickness, the peculiar shape, etc. feet, fine teeth, long legs, arcs, slopes, openings, viewpoints, etc., to avoid deformation of cross-section or point size , twist, and spiral defects.

4. Due to the influence of heat resistance during the processing of aluminum parts, the high requirements for the decorative appearance of aluminum profiles must be more up and down before and after turning, which is conducive to uniform heat dissipation, reducing crystallinity due to uneven heat, and then horizontal bright spot defects occur. , especially the wide wide surface, the aluminum alloy profile with thick wall should pay more attention.

5. The stretching must be moved to the stretching frame before the aluminum alloy profile is cooled to 50 degrees, otherwise the stretching will be very hot at high temperature, including the aluminum parts processing operator will also feel very hot, but also because of it Functional defects such as twists and twists before and after the internal stress aging of aluminum alloy profiles cannot be completely eliminated.

6. During the process of taking, moving and stretching, do not rub, pull, stack, block or wrap each other, and keep a certain interval. It is easy to twist and turn, the length of aluminum parts processing should be processed in time, and mutual maintenance must be done well.