Force Required To Bend Sheet Metal

The slack between the wipe die and the punch plays an important role in getting a good result.

Force required to bend sheet metal.

Edge bending gives a good mechanical advantage when forming a bend. Calculate the required force to bend a piece of sheet metal using wipe bending also called edge bending. 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 relationship is inversely proportional so if the v opening is doubled the tonnage will be halved.

The bending force can be calculated from the sheet thickness die opening bend length and the ultimate tensile strength of the material. If we were to estimate force needed to bend only the two indentations it would be just 2f. The sheet metal is clamped down and then bent upwards to a desired angle. I want to know the force required to bend a piece of sheet metal in a hand bending brake.

The action is performed in the video below. The bending force can be calculated from the sheet thickness bend length die edge radius punch edge radius and. 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.

This estimator calculates a force representative of the pressbrake requirement for air bending. The total strength of bending of a sheet is directly proportional to the length of bending. Sizing of a machine or available die width should allow for up to 20. 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.

Its yield strength is about 30 000 psi. 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. As a result the wipe die also determines the bend s inner radius. Tensile strength is the amount of force required to tear or pull apart the metal.

Wipe bending or edge bending is another way to bend sheet metal edges. 304 stainless has a tensile strength of about 75 000 psi. However angles greater than 90 degrees will require more complex equipment capable of some horizontal force delivery. The strength of the table is the force required to bend sheet metal up to 1 m in length.