Design and optimization of a demagnetization device for fine blanking process by finite element analysis

In companies dedicated to fine blanking, commonly dedicated to auto parts production, different phenomena appear throughout the production process of auto parts. One of them is the appearance of residual magnetism on some of the components involved in manufacturing these pieces. This paper describes the analysis and simulation of a coil of a degaussing device applied to a component present in fine blanking dies known as a holding plate. For a successful design of a demagnetizer system, it is mandatory to design the coil capable of exerting the magnetic field required to reorient the residual magnetism present in the fine blanking process. The magnetic properties inherited by the holding plate depend on the material being stamped, the production time to which the die has been subjected, and the corrective and preventive maintenance. This research analyzes the intensity of the magnetic field generated by a coil, the behavior of magnetic lines of the holding plate with residual magnetism when approaching the wind, and the magnitude of the voltage demanded by these through the finite element method.