Bending Force Formula For Sheet Metal

Substitute the given values in the formula bf safetyfactor kfactor ultimatestrength bendlength thickness 2 dieopening.

Bending force formula for sheet metal.

The die ratio may be entered to calculate the die opening which is typically 6 to 18 times the sheet thickness. Here end the fabrication formulas for sheet metal up next we ll be seeing some of the terminologies in sheet metal that you ll need. Get to know them better to learn advance concept easily. The tensile strength of ordinary materials σb 450n mm2 which can be substituted into formula 2 to obtain.

Where a is the bending angle t is the sheet thickness and r is the bending radius. Sheet thickness 3. R inner radius when the sheet is bent. Bend line shift bls the distance from the outside mold line to the original bend line on the flat pattern this is used to calculate the backstop location when working off of a flat pattern.

The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force. The bending force can be calculated from the sheet thickness die opening bend length and the ultimate tensile strength of the material. Therefore even a simple bench with enough room to bend 3 m pieces will do the job. Bend length 3.

Ossb is defined as illustrated in figure 5 for different bending angles and can be calculated using the equation below. First let us calculate the v bending force. 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. K the width of the horizontal projection of the bending deformation zone.

Factor of safety 4. The required die width is 12 mm and tonnage per meter is 22. Die ratio 6. As explained in my first post the bend deduction can be calculated using the following equation.

Air bend force chart a chart used to calculate the tonnage required for a bend based on thickness tooling and length. Where ossb is the outside setback. 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. My workpiece s bending line is 3 m so the overall needed force is 3 22 66 tonnes.

Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer.