Force Required To Bend Sheet Metal Leaf Brake

This is large enough so you could form it using a standard punch and v die bending the workpiece to the desired angle and dimension using two separate hits see.

Force required to bend sheet metal leaf brake. 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. I want to know the force required to bend a piece of sheet metal in a hand bending brake. My workpiece s bending line is 3 m so the overall needed force is 3 22 66 tonnes. The die ratio may be entered to calculate the die opening which is typically 6 to 18 times the sheet thickness.

Say a 45 degree bend angle and a 0 250 in. This jmt calculator calculates a force representative of the press brake tonnage required for air bending based on your material thickness type length vee die width and your smallest bend radius. The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force. Its four times as hard.

Figure 1 a proper set up of the sheet metal brake is necessary because accurate bending of sheet metal depends on the thickness and temper of the material to be formed and the required radius of the part. If the width to thickness ratio v s is not equal to 9 and the diameter to width ratio is not equal to 0 16 the above calculator will no longer be applicable. Many times a blueprint will specify an offset geometry with bend angles other than 90 degrees. The average hack requires at least one angled metal part and the best tool to make one is still the good ol press brake.

The other thing to remember is that in terms of sheet metal equipment the force required goes up with the square of the increase in thickness. The action is performed in the video below. Inside dimension as shown in figure 8. Calculate the tonnage required to complete a 90 bend with a hydraulic press brake.

Still there is one thing to keep in mind. Its not twice as hard to bend 6 gage as it is to bend 12 gage. Therefore even a simple bench with enough room to bend 3 m pieces will do the job. An air bend force chart or force chart breaks down a number of key components of sheet metal bending in an easy to reference format.

Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer. The following bending force calculator should be used. Please check the new method for calculating the bending force of a press brake machine. The bending force can be calculated from the sheet thickness die opening bend length and the ultimate tensile strength of the material.