coin bending
painutus paindestantsi templi ja matriitsi vahelise kontaktiga, millega kaasneb painutatava materjali paksuse vähenemine; elastne järelmõju praktiliselt puudub (vrd kontaktpainutus; kontaktivaba painutus), a type of bending in which the workpiece is stamped between the punch and die; both the punch tip and punch actually penetrate into the metal past the neutral axis under a high amount of pressure (compare: bottom bending; air bending)