Force Required To Bend Sheet Metal Leaf Brake

Calculate the required force to bend a piece of sheet metal using v bending a process in which a v shaped punch presses the sheet into a v die.

Force required to bend sheet metal leaf brake.

The brake set up for box and pan brakes and cornice brakes is identical. Its not twice as hard to bend 6 gage as it is to bend 12 gage. New bending force calculation method. 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.

Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer. 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. Inside dimension as shown in figure 8. Many times a blueprint will specify an offset geometry with bend angles other than 90 degrees.

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 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. Discover all our calculation tools in the calculators section of the top menu.

The following bending force calculator should be used. Its four times as hard. The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force. The die ratio may be entered to calculate the die opening.

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. 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. This added hardness increases the amount of force needed to place a bend on a stainless steel sheet. The tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels.

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 bending force can be calculated from the sheet thickness die opening bend length and the ultimate tensile strength of the material. This makes bending stainless steel with common hand tools difficult and a sheet metal brake is often required. As you bend a stainless steel sheet the bend area cold hardens increasing the amount of pressure required to finish the bend.