Method and apparatus for producing metal sheets
AssigneeUlrich BRUHNKE
InventorsRalf ANDERSECK, Andreas JAEGER, Karl-Heinz LINDNER
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Abstract
Metal sheets (13) are produced from strand-shaped profiles (8) having a low thickness, made of magnesium or magnesium alloys by way of an extrusion system (1). The open or closed extruded profile (8) exiting the extrusion die (6-7) of an extrusion press (1) is shaped to obtain a fiat metal sheet (13) and is then subjected to a defined shaping process by way of stretch-forming. The system for carrying out the method is essentially composed of an extrusion press (1) comprising a die plate generating the extruded profile and a shaping unit (5) following the die plate, wherein the shaping unit (5) is composed of a severing unit (2), a bending unit (3), and an unrolling unit (4).
Claims8
A method for producing metal sheets from strand-shaped profiles having a low thickness made of magnesium or magnesium alloys, an open or closed extruded profile being produced in a preceding method step, the closed extruded profile optionally being severed along the peripheral surface line thereof, characterized in that
- in a first step, the extruded profile is severed or notched corresponding to the length of the metal sheet to be produced;
- in a second step, the open or closed extruded profile is bent open to obtain a U-shaped profile, wherein the closed profile is previously severed along the peripheral surface line thereof;
- in a third step, the U-shaped profile is transferred into an unrolling unit and gripped by way of gripping elements on the longitudinal sides of the U-shaped profile;
- in a fourth step, the U-shaped profile is shaped by way of the outwardly moving gripping elements to obtain a metal sheet;
- and
- in a fifth step, the metal sheets are subjected to defined shaping by way of stretch-forming.
Dependencies are inferred from the claim text.