Knowledge

Aluminum sheet is a kind of material used in life. When people bend the aluminum sheet at 90 degrees, crack phenomenon will occur, which will seriously affect the performance and plague the users. So what is the cause of the crack in the aluminum sheet? How to avoid it? Henan Henry aluminum sheet manufacturers answer everyone one by one.

Analysis of the causes of bending and cracking of aluminum sheets:

1. The hardness of the aluminum sheet is too high. The hardness of the aluminum sheets of different grades and states is different. Generally, the aluminum sheets of the 1 series, 3 series and 5 series are easy to be bent, and the hardness of the 6 series and 7 series aluminum sheets is too high, and it is necessary to first perform annealing treatment to the O state before bending.

2. The state of the aluminum sheet. The state of the aluminum sheet is divided into full hard, semi-hard, soft state (also called O state), and the hard bending effect is basically not very good (the aluminum sheet temper is H18, H19, H38, etc. are all hard), semi-hard state Almost all aluminum panels can be bent (H24 is semi-rigid). The O-state bend is certainly no problem, but because it is too soft, basically this kind of state is used to bend less.

3. The quality of the aluminum sheet. If the aluminum sheet manufacturers are producing aluminum sheets, the production process is not mature, the processed aluminum sheet impurities alloy is exceeded, and the chemical composition is unqualified, which will also cause cracking when the aluminum sheet is bent. There is also the quality of the aluminum sheet, the same type of aluminum plate, the aluminum sheet produced by the large aluminum plate manufacturers is generally not easy to crack, and the products produced have quality assurance.

4. The bending process is improper. The side of the 1 bend is parallel to the rolling direction of the aluminum sheet, so that it is easy to crack and turn the bending direction by 90 degrees. 2 The bending of the aluminum sheet is greater than the minimum bending radius, and the bending radius is generally 1.5 times the thickness of the plate. 3 The thickness of the sheet is too thick and the bending angle exceeds the bending limit of the material itself.

If you want to avoid serious cracking when the aluminum sheet is bent, you must first choose a large, regular aluminum sheet manufacturer, so that the quality of the aluminum sheet is more guaranteed. Secondly, confirm the strength and elongation of the aluminum sheet before bending to see if it is suitable for bending. Finally, pay attention to the correct way when bending.