Process and device for metal spinning
AssigneeZeppelin-Metallwerke GmbH
InventorsErich Sieger, Detlef Muller-Wiesner, Michael Schnellbugel
Life of this patent
Estimating the term…
Abstract
A process and a device for metal spinning a blank into a formed part, especially into a vessel bottom, are described, which can be used for forming materials including materials which are difficult to deform, with high dimensional accuracy and/or high degrees of deformation. For attaining this object, the blank is clamped on its circumference and forced freely, i.e. without using a spinning chuck, into a clearance by means of a motion-controlled spinning tool until its finished dimension is reached.
Claims45
A process for metal spinning a generally flat metal workpiece into a formed part, which process comprises providing a generally circular metal workpiece, clamping the workpiece about a circumferential portion thereof, with a spinning tool pressed against one side of the workpiece forcing the workpiece into a clearance to form a hollow portion and forcing the hollow portion into the clearance with the spinning tool pressed against an inside wall of the hollow portion until a final part finished dimension is reached, in a first heating stage heating the entire workpiece to a first temperature below an elevated operating temperature for spinning, and in a second heating stage heating sections of the workpiece to be spun to the operating temperature, and wherein the operating temperature is below the recrystallization temperature of the workpiece metal.
A device for spinning a metal workpiece into a formed part, said device comprising a clearance for receipt of the part being formed by freely spinning the workpiece into the clearance, the clearance having a depth larger than that of the part to be formed, a clamping device for clamping the workpiece and arranged in front of the clearance, a motion-controlled spinning tool adapted to spin the workpiece into the clearance, and a two-stage heating device adapted, in a first stage component thereof to heat the workpiece to a first temperature below an operating temperature which is below the recrystallization temperature of the workpiece metal and, in a second stage component thereof, to heat to the operating temperature a section of the workpiece being spun.
A device for spinning a metal blank into a formed part, said device comprising a clearance comprising a forming chamber for receipt of the part being formed by freely spinning the blank into the clearance, the forming chamber having a depth larger than that of the part to be formed, a clamping device for clamping the blank and arranged in front of the forming chamber, a motion-controlled spinning tool adapted to spin the blank into the forming chamber, and a hot supply pipe for supplying hot air to the forming chamber.
A device according to the claim 39, further comprising means to change the rate of air heating, the volume of hot air supplied to the forming chamber, and the rate of heating of selected sections of the blank in accordance with a measured temperature of the blank.
A process for spinning a blank of an age hardenable metal into a formed part, which comprises heating the entire blank to a first, elevated temperature below a second, spinning temperature which is higher than the first temperature and below a maximum age hardening temperature of the metal, successively heating selected sections of the blank to the second temperature, and freely spinning into the formed part the selected heated sections into a clearance having a depth greater that the depth of the formed part.
Dependencies are inferred from the claim text.