The aluminium plate manufacturer tells you what to do if the aluminium plate cracks after bending.
Several main causes and precautions for cracking of aluminium sheet after bending:
1. Hardness of Aluminum Plate
Aluminum sheet is too hard to crack. This requires the selection of high quality aluminium sheets, mainly aluminium alloys and state aluminium. Usually, series 1, 3 and 5 are commonly used; Series 6 and 7 have too high hardness, so annealing treatment is needed to make the O state bend well. And the quality of aluminium.
2. Thickness of Aluminum Plate
Too thick aluminium sheets do not bend well. We need to understand that we should try to use thinner aluminium sheets.
3. The Size of R Angle Bending
The bigger the bend R angle is, the higher the success rate is, so adjust the bend R angle as much as possible.
4. Texture Direction of Aluminum Plate
The bending direction should be perpendicular to the texture direction of aluminium, not parallel.
5. When drawing aluminium parts, it is better to bend first and then draw out the shape. If the process permits, otherwise it will increase the probability of bending and cracking.
First of all, the most important countries are divided into hard and semi-hard state, soft state (usually called O state) is not the basic line of bending effect (aluminum plate is H18, section H19 and H38 all difficulties) semi-hard state aluminum plate can basically bend (H24 semi-rigid) O bending state is certainly no problem, but because it is too soft, basically using this state to bend is relatively small, then you should. Choosing pure aluminium or pure aluminium alloy, the hardness of aluminium is not very high, there are 1100, 1050, 1060 and so on. It can be recommended to use 1100h26 aluminium alloy with better hardness. It can use 3003, 3005, 5052 and other semi-hard states.
Specific circumstances suggest that samples should be determined if in 6061, 2024, 7075, due to the high hardness, especially in T6 state, they should be bent. Except for thermal folds, the difference of high quality is poor quality of aluminium and alumina, tolerance, surface effect, crystal accuracy and uniform stability of differentiation, and the effect of bending is somewhat different from that of loneliness.