Force Required To Bend Sheet Metal Folding

As this happens you gain a small amount of total length in your part.

Force required to bend sheet metal folding. The bending force can be calculated from the sheet thickness die opening bend length and the ultimate tensile strength of the material. ε y σy bending force requirement punch workpiece t die w force t sheet thickness w width of die opening l total length of bend into the page uts ultimate tensile. This tool allows you to determine tonnage internal radius v die opening and minimum flange you just have to insert the characteristics of the sheet metal to be bent. Understanding the bend allowance and consequently the bend deduction of a part is a crucial first step to understanding how sheet metal parts are fabricated.

Wipe bending or edge bending is another way to bend sheet metal edges. Air bending is a simple method of creating a bend without the need for lower die geometry. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. The total strength of bending of a sheet is directly proportional to the length of bending.

Now we know that for bending the sheet metal with 4mm thickness and 1m length the required tonnage is 330kn. The slack between the wipe die and the punch plays an important role in getting a good result. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. Here we come to the conclusion.

It is important to make sure that the sheet is properly pushed onto the wipe die. The tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels. To define the bend region and reduce the force required to bend a part out of sheet metal down to something you can handle without a brake press slots can be cut at the bending line to. The sheet metal is supported by two surfaces a certain distance apart.

A punch exerts force at the correct spot bending the sheet metal between. As a result the wipe die also determines the bend s inner radius. You should choose at least 100ton press brake. If bend the 4mm sheet in 3 meters then the tonnage should be 330 3 990kn which equals to 101 ton.

F 2 ybh2 4 fl 4 m max f bh2y l l σ ε e. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. Stress distribution through the thickness of the part s s y y y y y. The strength of the table is the force required to bend sheet metal up to 1 m in length.

The die ratio may be entered to calculate the die opening which is typically 6 to 18 times the sheet thickness.