Bending Force Formula For Sheet Metal

1 the bending force for v bending is obtained using the following equation.

Bending force formula for sheet metal.

The following bending force calculator should be used. 3 carbon 45 kg mm. The bending force can be calculated from the sheet thickness die opening bend length and the ultimate tensile strength of the material. The size of that force is considered to be 5 to 10 times the free bending force.

Ultimate tensile strength psi. Advantages of bottoming include greater accuracy and less springback. 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.

Larger bend radii require about the same force for bottoming as they do for air bending however smaller radii require greater force up to five times as much than air bending. Where ossb is the outside setback. 1 bending force for v bending see fig. 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 bending radius must be at least 0 8 t to 2 t for sheet steel. Get to know them better to learn advance concept easily. 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. Calculate the ratio of the tensile strength of your material to the standard steel.

Round up to the nearest v opening on the chart to match to your tooling. Air bend force chart a chart used to calculate the tonnage required for a bend based on thickness tooling and length. Punch edge radius in. Ossb is defined as illustrated in figure 5 for different bending angles and can be calculated using the equation below.

As explained in my first post the bend deduction can be calculated using the following equation. The die ratio may be entered to calculate the die opening which is typically 6 to 18 times the sheet thickness. Please check the new method for calculating the bending force of a press brake machine. Calculate your desired v opening based on the thickness of the sheet metal you re bending.

An extremely large force is required in bottom bending depending on the amount of bottoming. The bending force calculation formula obtained here is very consistent with the data on foreign brochures. Die edge radius in.