Experimental and Simulation study of variable temperature effect on piercing tool with different cutting velocities

The impact of thermal stresses on cutting tool blades is an important issue. The researchers are broaching for it in the field of shear cutting processes, therefore the blanking or piercing process by the punch-die system regarding the important process that must be reducing of producing stresses on cutting tool to increase service life and production. This research is regarding the cutting tool at initial impact in sheet metal as a restricted beam between two walls, therefore the thermal stresses law for this type is applied. The variables are temperature difference between the cutting tool and ambient, linear cutting speed and subjecting cutting force on sheet metal due to electric motor power and velocity to translate power. The practical work is in two case studies, first without lubricant liquid and another with lubricant liquid to reduce variable (temperature difference ∆T). In the first case when the cutting speed is increased led to an increase of (∆T) and this is led to the compression strain of the tooltip during impact with sheet metal. The simulation of two cases is performed by the auto desk inventor program and the results are convergence with the practical results in correction factor about (75%) and standard deviation about (0.275). According to these results the simulation approach can be used in the shear cutting process to reduce the thermal stresses at punch impact in sheet metal.