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Bending machine for forming corrugations in sheet metal

A bending machine and metal sheet technology, applied in the field of bending machines, can solve problems such as flatness and defects of metal sheets

Active Publication Date: 2021-06-15
GAZTRANSPORT & TECHNIGAZ SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be observed that the metal sheets obtained by this type of bending machine show defects in flatness due to the phenomenon of elastic recovery

Method used

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  • Bending machine for forming corrugations in sheet metal
  • Bending machine for forming corrugations in sheet metal
  • Bending machine for forming corrugations in sheet metal

Examples

Experimental program
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Embodiment Construction

[0063] Figure 10 A sheet of corrugated metal is shown used to form the sealing membrane of a storage tank for storing a cryogenic fluid such as liquefied natural gas.

[0064] Said rectangular metal sheet 1 comprises a first series of parallel "low" corrugations 2 extending in direction y from one edge of said metal sheet 1 to the other, and A second series of parallel "high" corrugations 3 extending in direction x. The direction x and the direction y of the series of corrugations are at right angles. The corrugations 2, 3 protrude, for example, from the side of the inner surface of said metal sheet 1 intended to come into contact with the fluid in the tank. In this case, the edges of the sheet metal 1 are parallel to the corrugations 2,3. It should be noted that the terms "high" and "low" have a relative meaning and mean that the "low" corrugations 2 have a lower height than the "high" corrugations 3 . In a variant not shown, the corrugations 2, 3 may have the same heigh...

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Abstract

The invention relates to a bending machine for forming corrugations (2) in a metal sheet (1) for constructing a sealing membrane of a fluid storage tank, said bending machine (9) comprising: - a lower frame (11); - a lower mold with impression; - an upper frame (10), which includes an upper punch; - said bending machine (9) also includes first and second pointers (35, 36) on either side of said upper punch (12), each of said first and second pointers (35, 36) comprising a lower end facing said lower frame (11), And said first and second pointers (35, 36) are mounted to rotate on said upper frame (10) between a rest position and a working position about an axis of rotation parallel to the longitudinal axis of the corrugations to be formed.

Description

technical field [0001] The invention relates to a bending machine for forming corrugations in sheet metal. [0002] The sheet metal obtained by means of this bending machine is used in particular for the construction of sealing membranes for fluid storage tanks. The invention therefore also relates to the field of hermetically sealed tanks of the membrane type for storing and / or transporting fluids, such as cryogenic fluids. Background technique [0003] Document WO2015170054 discloses a bending machine for forming corrugations in a metal sheet having preformed corrugations perpendicular to said preformed corrugations. The bending machine comprises a lower die with first and second mold elements each having a support surface for the sheet metal and a concave half-impression, the first and second mold elements are respectively mounted It is made to slide along the direction x perpendicular to the corrugation direction to be formed on the lower frame, in order to be able to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D13/02
CPCB21D13/02B21D5/0218B21D5/029
Inventor 奥利维尔·佩罗特安东尼·德法利亚托马斯·康妮杰罗弗雷德里克·格斯里斯穆罕默德·萨西
Owner GAZTRANSPORT & TECHNIGAZ SA