Force Required To Bend Sheet Metal

Edge bending is another very common sheet metal process and is performed with a wiping die.

Force required to bend sheet metal.

Its yield strength is about 30 000 psi. The sheet metal is clamped down and then bent upwards to a desired angle. The slack between the wipe die and the punch plays an important role in getting a good result. Actual bending force is affected by many factors such as friction between the material and the die material thickness material strength variations rolling direction of the steel work hardening and other parameters.

The action is performed in the video below. Calculate the required force to bend a piece of sheet metal using wipe bending also called edge bending. The bending force can be calculated from the sheet thickness bend length die edge radius punch edge radius and. Tensile strength is the amount of force required to tear or pull apart the metal.

Sizing of a machine or available die width should allow for up to 20. This estimator calculates a force representative of the pressbrake requirement for air bending. Edge bending gives a good mechanical advantage when forming a bend. Wipe bending or edge bending is another way to bend sheet metal edges.

The die ratio may be entered to calculate the die opening which is typically 6 to 18 times the sheet thickness. In this process the sheet is held between a wipe die and pressure pad while a punch presses against the edge of the sheet. However angles greater than 90 degrees will require more complex equipment capable of some horizontal force delivery. The relationship between the v opening and the required tonnage is straight forward the larger the v opening the less tonnage is required to bend the metal.

It is important to make sure that the sheet is properly pushed onto the wipe die. The bending force can be calculated from the sheet thickness die opening bend length and the ultimate tensile strength of the material. But because there is some extra force spent on dragging the sheet up the inclined walls of the center ridge it s sate to allow 2 5 f. The total strength of bending of a sheet is directly proportional to the length of bending.

The strength of the table is the force required to bend sheet metal up to 1 m in length. As a result the wipe die also determines the bend s inner radius. The relationship is inversely proportional so if the v opening is doubled the tonnage will be halved. Let s say i wanted to bend a piece of 032 thick al 3 long to 110 given the brake was able to make this degree of bend.