Cutting Force Formula For Sheet Metal

Punching force calculation formula.

Cutting force formula for sheet metal.

F p x t x psi. F s p dt where f is the maximum punch force in pounds s is the nominal tensile strength of the material being drawn psi d is the punch or cup diameter and t is the blank thickness. The resulting drawing force cannot be used as failure criteria for cup drawing. F is force required in pounds p is perimeter around area to be sheared inches t is sheet thickness in inches psi is the shear strength rating of the material in pounds per square inch.

Thus the force equals pressure times the cross sectional area of the cup wall. Bottom bending one of the three types of bending for sheet metal where the radius of the punch tip is pushed into the sheet metal. Blanking the process of cutting flat patterns from stock sheeting done typically with lasers water jets plasmas or punch presses. The cutting force calculation of inclined blade shear with blade support in straight motion mainly use the norshari formula by the former soviet scholar.

You can calculate the punching tonnage been required with the help of the following punching force calculation formula blanking force formula. α cutting angle. This equation will calculate the force required to pierce or shear sheetmetal. Ultimate tensile strength psi.

In the cutting force formula σ b plate tensile strength limit n mm. Shear strength 80 of tensile strength. F cutting force s material thickness l total cutting length a l x s shear area tß shear strength note. δ x plate elongation ratio.