Bending Force Formula For Sheet Metal

Ultimate tensile strength psi.

Bending force formula for sheet metal.

1 the bending force for v bending is obtained using the following equation. 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. Air bending one of the three types of bending for sheet metal where the outside mold line is not pressed against the die. Ossb is defined as illustrated in figure 5 for different bending angles and can be calculated using the equation below.

The bending force calculation formula obtained here is very consistent with the data on foreign brochures. Round up to the nearest v opening on the chart to match to your tooling. New bending force calculation method. The bending radius must be at least 0 8 t to 2 t for sheet steel.

Where ossb is the outside setback. The size of that force is considered to be 5 to 10 times the free bending force. 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.

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. The die ratio may be entered to calculate the die opening which is typically 6 to 18 times the sheet thickness. Advantages of bottoming include greater accuracy and less springback. 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.

3 carbon 45 kg mm. An extremely large force is required in bottom bending depending on the amount of bottoming. 1 bending force for v bending see fig. Punch edge radius in.

Air bend force chart a chart used to calculate the tonnage required for a bend based on thickness tooling and length. Die edge radius in. The following bending force calculator should be used. Please check the new method for calculating the bending force of a press brake machine.

Where a is the bending angle t is the sheet thickness and r is the bending radius. As explained in my first post the bend deduction can be calculated using the following equation. The bending force can be calculated from the sheet thickness die opening bend length and the ultimate tensile strength of the material.