Patent ID: 8166793

Claim:
An electromechanical device for working, smoothing and cold-hardening a surface of one or more parts, the device comprising: an impact head, the impact head kept in a resting position without an excitation current (I 2 ) by a first magnetic flux (B 1 ), wherein an impact frequency and an impact amplitude are produced in such a variable manner by a flow of at least one of an alternating and pulsed excitation current (I 2 ), with or without a variable direct current component, through one or more windings of at least one coil ( 4 ) placed within at least one of the first magnetic flux (B 1 ) and a different second magnetic flux (B 2 ); wherein a distance of a zero crossing of the impact frequency from the surface of the one or more parts is changed by the excitation current (I 2 ).