A Thermoelectrically Based Approach to Reduce Adhesive Wear During Blanking

摘要

Almost every metal mass product goes through a blanking process. Especially when processing aluminum, adhesive wear determines the cost efficiency. Many investigations on wear influencing factors were conducted so far, but one major determinant is almost unnoticed, the Seebeck effect. Due to this phenomenon, thermoelectricity occurs in every blanking tool. Recently published investigations show that the combination of tool and workpiece material has an influence on occurring thermoelectric currents and thus on adhesive wear development, whereby the current strength mainly depends on the material-specific Seebeck coefficient. This paper addresses the same phenomenon for a wider parameter spectrum. Blanking experiments with the aluminum EN AW 5083 were performed measuring both thermoelectric currents and the amount of adhesive wear. A variation of the tool material between the high-speed steel 1.3343, the stainless steel 1.4301, and the cemented carbide CF-H40S confirms the strong relation between Seebeck coefficients, thermoelectric currents, and tool wear.