How to calculate the bending force in the processing of stamping parts

The size of the bending force in the processing of stamping parts is related to the size of the blank, the mechanical properties of the material, the distance between the fulcrums of the die, the relative bending radius, the die gap, the friction factor between the material and the die, the size of the bending angle, the bending method and other factors, so it is difficult to In theory, the bending force is accurately calculated. In production, empirical formulas or simplified theoretical formulas are usually used; 1. The empirical formula for V-shaped free bending in stamping parts processing is; where F-----bending force (N ) C-----coefficient; b-------width (mm); t--------material thickness (mm); Rm--------tensile strength ( MPa); 2L---------distance between fulcrums (mm); K----------coefficient, K≈(1+2t/L)t/L; 2. Stamping parts The empirical formula for V-shaped contact bending during processing is; where C is the coefficient, and the value is 1~1.3rp-----punch fillet radius (mm) 3. U-shape is free in the processing of stamping parts The empirical formula for bending is Fu003dKbtRm where K is the coefficient, and the value is 0.3 to 0.64, and the empirical formula for U-shaped contact bending is the C ------ coefficient in the formula, and the value is 1 to 1.3. Previous: Stamping parts processing factory talk about the deformation characteristics of sheet metal bending