METHOD FOR PRODUCING A GAS OR LIQUID TANK

Abstract

The invention relates to a method for shaping a workpiece having a drum-type peripheral wall, on the inner face of which an inner profile featuring longitudinal ribs is formed by feeding at least one profiling roll to said inner face. According to the invention, at least one rotatably mounted profiling roll is fed to an inner face of the peripheral wall of the workpiece, and said at least one profiling roll rotates relative to the inner face of the peripheral wall such that the inner profile is formed in the inner face in a non-cutting manner.

Claims

1.-12. (canceled)

13. A method for producing a gas or liquid tank with a drum-shaped circumferential wall by means of forming, in which on an internal side of the circumferential wall an internal profile with axial longitudinal ribs is formed in a non-cutting manner, wherein the axial longitudinal ribs of the internal profile are provided for the reinforcement of the hollow body wall of the gas or liquid tank, characterized in that for the forming of the longitudinal ribs at least one rotatably supported profiling roller is fed to the internal side of the circumferential wall of the gas or liquid tank, in that to each internal profiling roller an external counter-pressure roller is assigned which is fed radially opposite the profiling roller to an external side of the gas or liquid tank, and the at least one profiling roller circulates relative to the internal side of the circumferential wall, wherein the internal profile is formed in a non-cutting manner.

14. The method according to claim 13, characterized in that the at least one profiling roller is fed axially and/or radially.

15. The method according to claim 13, characterized in that at least two profiling rollers are fed, the positions and feed movements of which are coordinated so that a uniform internal profile is formed on the internal side.

16. The method according to claim 13, characterized in that a profiling is exclusively carried out on the internal side of the circumferential wall.

17. The method according to claim 13, characterized in that during the forming of the internal profile into the internal side an external side of the circumferential wall remains non-deformed.

18. The method according to claim 13, characterized in that as internal profile a toothed profile is formed.

Description

[0022] The invention is set out further hereinafter by way of a preferred embodiment illustrated schematically in the accompanying drawing.

[0023] The FIGURE shows a partial cross-sectional view in a highly schematic manner through the part of a device 10 during the forming of a workpiece 1 with a drum-shaped circumferential wall 2.

[0024] A profiling roller 12 with an external profile 14 is fed radially to an internal side 3 of the workpiece 1 while the said workpiece 1 is set into rotation in the direction of the arrow. Due to the radial feeding the circumferential wall 2 of the workpiece 1 is deformed in a non-cutting manner, whereby an internal profile 5 is designed according to the profile 14 of the co-rotating profiling roller 12. The internal profile 5 has axially running longitudinal ribs 6.

[0025] Radially opposite the profiling roller 12 a smooth-surfaced counter-pressure roller 16 is applied to an external side 4 of the workpiece 1. The co-rotating counter-pressure roller 16 ensures that the external side 4 of the circumferential wall 2 of the workpiece 1 remains non-deformed, whereby a smooth circulation of the rotating workpiece 1 is secured.