Tips for getting started with sheet metal bending

Anyone familiar with sheet metal work will know that bending is one of the most difficult and technically demanding operations in sheet metal work.

1.what is bending

Bending refers to the process of bending a flat sheet in three-dimensional space through pressure equipment and special molds. Due to the different materials, thicknesses, lengths, and widths of the plates, as well as different shapes and angles to be formed, the tonnage of the bending machine and the size of the stamping equipment are also different, and there are upper and lower dies with different heights, shapes, V-shaped widths and sizes. , has a special mold with its special shape.

2.There are three types of bending processing: close bending, partial bending, and embossing bending.

2.1 Close-fitting bending: refers to the upper die with a right angle or an obtuse angle of more than 90°. Select the bending method of the lower die with a groove width equal to 6~12 times the material thickness.

2.2 Partial bending: refers to the method of selecting the upper die below 88° and selecting the lower die with a groove width equal to 12 times the material thickness for obtuse and right-angle bending.

2.3 Imprinting and bending: refers to the upper die with a right angle of 90°. Select the bending method of the lower die with the groove width equal to 5~6 times the material thickness.

4.Use of bending dies.

1. The bending dies are made of high-quality steel and have undergone special heat treatment for high hardness, wear resistance and pressure resistance. However, the pressure limit that each set of molds must withstand is: tons per meter, so when using the mold, you must choose the correct mold length, that is, how much pressure to add per meter, and never exceed the pressure indicated on the mold, which is very important. Important and must be kept in mind.
2.  In order not to damage the mold, we stipulate that the upper and lower molds with a length of 300 mm or more are used to align the origin. The upper and lower dies of the same height can only be used after the origin is set. It is strictly forbidden to use the divided small mold as the origin, and the origin must be based on the internal pressure of the AMADA machine.
3.  When using molds, when selecting molds on the machine, only molds with the same height can be used, and molds with different heights cannot be used, because different molds do not have the same height.
4. When using the mold, it is necessary to select the appropriate upper mold and lower mold according to the hardness of the plate, the thickness of the plate and the length of the plate. We generally use the lower mold according to the standard of 5~6T, and the length is longer than the plate. , the larger the thickness of the material, the wider the lower die groove applied.

1. When bending the sharp corners or pressing the dead corners, you should choose 30 degrees to bend the sharp corners first, and then press the dead corners. When bending the R angle, the upper R die and the lower R die must be selected to achieve this purpose.
2. When bending long parts, it is best not to use segmented molds to reduce joint indentation, and it is best to use single-slot molds, because the V-shaped groove R of the lower single-slot mold is large, and it is not easy to produce bending indentations. .
3.  When using the mold, you must keep a clear head. After the machine completes the origin alignment, lock the upper and lower molds to prevent the mold from falling and hurting people or the mold. During the operation, pay attention to the pressure, do not add too much pressure at once, and pay attention to the data changes displayed on the screen.
4. After using the mold, put it back on the mold holder in time and place it according to the logo. Frequently clean the mold of dust and apply anti-rust oil to avoid mold rust and reduce precision.

The above is how to use the bending machine and mold. How to use it requires on-site guidance and practice! Do you want to know more about sheet metal processing? Platinum Shield will continue to give you more knowledge about sheet metal processing.