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US 11,590,546 B2Granted
Method for forming a moulding and moulding
AssigneeNeuman Aluminium Fliesspresswerk GmbH
InventorJohann Willdonner
Life of this patent
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AssigneeNeuman Aluminium Fliesspresswerk GmbH
InventorJohann Willdonner
Estimating the term…
A shaped part and a method for forming the shaped part from a lightweight metal or alloy by extrusion of a slug performed along a pressing axis. The shaped part is formed in at least one region with a deviation from a basic form that is rotationally symmetrical with respect to the pressing axis. The symmetry-deviating region extends over a wall portion of the shaped part that is formed by backward cup extrusion with a normal vector extending predominantly orthogonally in relation to the pressing axis. The same extruding operation forms a structure that surrounds the pressing axis, on a sheet-like base of the shaped part that adjoins the wall portion and has a normal vector extending predominantly in the direction of the pressing axis on the side thereof opposite from the wall portion. In a region of lowest wall thickness of the wall portion at the transition to the base, the quotient of this wall thickness in mm and an average curvature (1/r) in mm−1, formed at the transition, is greater than 0.03 and/or, in an at least predominant region of the base-wall transition when seen in the circumferential direction, the ratio of the wall thickness to the base thickness is less than 1.0.
A method for forming a moulding from a light metal or a light metal alloy by impact extrusion of a slug carried out along a press axis, wherein
An impact extruded moulding made of a light metal or a light metal alloy, wherein the moulding is formed with a deviation from a rotationally symmetrical basic form with reference to a press axis by having a wall structure with a polygonal contour around the press axis, said wall structure of the moulding being formed by indirect cup extrusion and having a normal vector running predominantly orthogonally to the press axis, and in the same impact extrusion process a surrounding structure running around the press axis is formed by direct cup extrusion, direct hollow extrusion or direct solid extrusion on an areal base of the moulding adjacent to the wall section, said areal base having a normal vector running predominantly in the direction of the press axis, said surrounding structure being on the side of the areal base opposite the wall section, wherein in an area of smallest wall thickness of the wall structure at the transition to the base a quotient of the wall thickness in mm divided by an average curvature in mm−1 formed at the transition is greater than 0.03 and/or, seen in the circumferential direction, in an at least predominant area of the base-wall transition the ratio of wall thickness to base thickness is less than 1.0, wherein at least one pin is formed by solid extrusion on the areal base decentralized from a middle of the areal base.
Dependencies are inferred from the claim text.