Method for producing expanded metal profiles and profile produced by the method

A technology for metal profiles and profiles, which is used in the production of expanded metal profiles and can solve problems such as jeopardizing strength and weakening profiles.

Inactive Publication Date: 2007-05-30
DALLAN S R L CASTELFRANCO VENETO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Cracks can occur at the ends of the holes, weakening the profile and compromising its strength

Method used

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  • Method for producing expanded metal profiles and profile produced by the method
  • Method for producing expanded metal profiles and profile produced by the method
  • Method for producing expanded metal profiles and profile produced by the method

Examples

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Embodiment Construction

[0024] As can be seen from the accompanying drawings, with the method according to the invention, the unrolled metal strip with a width smaller than that of the obtained profile is uncoiled from the reel, and after a possible straightening operation, the metal strip passes through:

[0025] a pair of rolls 2 forming holes 6 and 8, respectively, in regions corresponding to the strip of metal sheet 4 to be slit;

[0026] a pair of slitting rolls 10 which form a plurality of longitudinal slits 12, 14 of different lengths arranged in parallel rows in the strip;

[0027] a pair of bending rolls 16 which form longitudinal oblong holes 18, 20 in the previously formed cuts 12, 14, wherein the edges of the oblong holes are bent towards the inside of the sheet metal strip;

[0028] A pair of deep drawing rolls 22, the punches of which are shaped to bend the curved edges of the oblong holes to obtain a rounded standing edge on each of said holes, the tangent of the free edge of which is ...

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PUM

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Abstract

A method for producing expanded metal profiles, consisting of subjecting a metal strip of width less than the development of the profile to be produced to the following operations: - forming longitudinal slits in at least that longitudinal band which is to form the central web of the profile, - bending the edges of the slits, - profiling said strip, - transversely stretching that band containing the slits, - pressing areas of said central web in correspondence with said stretched band to displace them external to the plane of said web, characterised by subjecting the bent edges to drawing to obtain radiused edging having the tangent to the free edge forming an angle not less than 90<0> to the surface of the strip.

Description

technical field [0001] The invention relates to a method for producing expanded metal profiles and to profiles produced by the method. Background technique [0002] Metal structures, especially C-shaped profiles, are known to support plasterboard or to form shelves. [0003] Said profile comprises a plurality of holes arranged longitudinally along its central web, which may be of various shapes, obtained by transverse tensioning of a sheet metal strip in which a number of cuts have been previously made. [0004] However, these known profiles have some disadvantages, in particular: [0005] Due to the sharp edges of the holes, it is dangerous for the user to handle the profile; [0006] Said sharp edges can damage the connecting cables passing through these holes; [0007] Cracks can occur at the ends of the holes, weakening the profile and compromising its strength. Contents of the invention [0008] According to the invention, all these disadvantages are eliminated by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D47/02E04C3/09E21D5/08B21D5/08B21D35/00E04C2/42E04C3/04
CPCE04C3/09B21D35/00E04C2/427E04C2003/0421B21D5/08E04C2003/0473Y10T29/18Y10T29/185Y10T29/496
Inventor 塞尔焦·达兰
Owner DALLAN S R L CASTELFRANCO VENETO
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