Material och anordning för defromation av en materialkropp

摘要

The device comprises a stamping member ( 2 ) arranged to be conveyed towards and hit a material body ( 1 ) with such a velocity that a rebound motion of the stamping member ( 2 ) is generated while a permanent deformation of the material body ( 1 ) is generated. The device has structure ( 3 ) for counteracting the rebound and generating at least one additional impact of the stamping member ( 2 ) against the material body ( 1 ) within a period, during which kinetic energy in the material body ( 1 ) generates an additional deformation in the body.