US 12,303,968 B2
Material forming
Erika Henriksson, Skoghall (SE)
Assigned to Cell Impact AB, Karlskoga (SE)
Filed by Cell Impact AB, Karlskoga (SE)
Filed on Apr. 17, 2024, as Appl. No. 18/638,176.
Application 18/638,176 is a division of application No. 17/272,248, previously published as PCT/EP2019/076040, filed on Sep. 26, 2019.
Claims priority of application No. 1851166-7 (SE), filed on Sep. 28, 2018.
Prior Publication US 2024/0261848 A1, Aug. 8, 2024
Int. Cl. B21J 9/02 (2006.01); B21D 28/00 (2006.01); B21J 5/00 (2006.01); B21J 7/28 (2006.01); B30B 15/06 (2006.01)
CPC B21J 9/02 (2013.01) [B21D 28/002 (2013.01); B21J 5/00 (2013.01); B21J 7/28 (2013.01); B30B 15/065 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for material forming, by means of a movable tool and a drive unit, the method comprising:
moving the drive unit to provide kinetic energy to the tool, for the tool to strike a work material, so as to form the work material,
providing an impact head between the drive unit and the movable tool,
providing the kinetic energy to the tool by the drive unit striking the impact head, the impact head extending in the direction of a stroke from an impact end to a base region, where in the base region is closer to the tool than the impact end,
arranging the impact head so that the impact end has laterally, in relation to the direction of the stroke, a smaller extension than the base region, and
providing the impact head and the tool with a respective collar at an interface between the impact head and the tool, the collar of the tool surrounding, as seen in the direction of the stroke, a working surface of the tool which comes into contact with the work material during the stroke,
wherein a first portion of the impact head extends from the collar of the impact head, to the impact end of the impact head, wherein the first portion presents a perimeter edge at the collar of the impact head, which, as seen in the direction of the stroke, substantially coincides with the working surface.