Steel wire mesh made of steel wires having hexagonal loops, production device, and production method

Abstract

A steel wire netting, in particular a hexagonal netting, made of steel wires includes hexagonal meshes, in particular for civil engineering purposes, preferably for an application in the field of protection from natural hazards, wherein the steel wires are alternatingly twisted with neighboring steel wires and wherein the steel wires are formed from a high-tensile steel or at least have a wire core made of a high-tensile steel, wherein an, in particular average, ratio calculated from an, in particular average, mesh width of the hexagonal meshes and an, in particular average, mesh height of the hexagonal meshes, measured perpendicularly to the mesh width, amounts to at least 0.75, preferably to at least 0.8.

1 . A hexagonal netting made of steel wires with hexagonal meshes, in particular for civil engineering purposes, preferably for an application in the field of protection from natural hazards, wherein the steel wires are alternatingly twisted with neighboring steel wires and wherein the steel wires are formed from a high-tensile steel or at least have a wire core made of a high-tensile steel, wherein an, in particular average, ratio calculated from an, in particular average, mesh width of the hexagonal meshes and an, in particular average, mesh height of the hexagonal meshes, measured perpendicularly to the mesh width, amounts to at least 0.8, wherein the mesh width is a distance between two twisted regions which delimit a hexagonal mesh, which extend at least substantially parallel to each other and which are situated on opposite sides of the hexagonal mesh, wherein the mesh height is a distance between two corners of the hexagonal mesh which are situated opposite each other in a direction parallel to a main extension direction of the twisted region, and wherein the high-tensile steel of the steel wires has a tensile strength of at least 1,560 N/mm 2 . 
     
     
         2 . The hexagonal netting according to  claim 1 , wherein the high-tensile steel of the steel wires has a tensile strength of at least 1,700 N/mm 2  and preferentially of at least 1,950 N/mm 2 . 
     
     
         3 . The hexagonal netting according to  claim 1 , wherein an, in particular average, length of a twisted region delimiting a hexagonal mesh is at least 30%, preferably at least 35%, of the, in particular average, mesh height. 
     
     
         4 . The hexagonal netting according to  claim 1 , wherein an, in particular average, length of a twisted region delimiting a hexagonal mesh is at least 50%, preferably at least 55% and preferentially at least 60% of the, in particular average, mesh width. 
     
     
         5 . The hexagonal netting according to  claim 1 , wherein an, in particular average, length of a twisting within a twisted region-delimiting a hexagonal mesh is less than 1.1 cm, preferably less than 1 cm. 
     
     
         6 . The hexagonal netting according to  claim 1 , wherein a twisted region delimiting a hexagonal mesh comprises more than three consecutive twistings. 
     
     
         7 . The hexagonal netting according to  claim 1 , wherein at least one, in particular average, aperture angle of the hexagonal mesh, spanning the hexagonal mesh in a longitudinal direction, is at least 70°, preferably at least 80° and preferentially at least 90°, wherein the longitudinal direction of the hexagonal mesh runs parallel to a main extension direction of the hexagonal mesh. 
     
     
         8 . The hexagonal netting according to  claim 1 , wherein the hexagonal meshes have an, in particular average, mesh width of approximately 60 mm, approximately 80 mm or approximately 100 mm. 
     
     
         9 . The hexagonal netting steel according to  claim 1 , wherein the high-tensile steel of the steel wires is implemented of a stainless type of steel or at least has a sheath of a stainless type of steel. 
     
     
         10 . The hexagonal netting according to  claim 1 , wherein the steel wires have a corrosion protection coating or a corrosion protection overlay. 
     
     
         11 . The hexagonal netting according to  claim 10 , wherein the corrosion protection coating is realized at least as a class B corrosion protection coating according to the standard DIN EN 10244-2:2001-07, preferably as a class A corrosion protection coating according to the standard DIN EN 10244-2:2001-07. 
     
     
         12 . The hexagonal netting according to  claim 1 , wherein at least two sub-pieces of the steel wires survive without rupturing, in particular in a test run, a screw-like winding around each other, further comprising at least N+1 twistings, preferably N+2 twistings and preferentially N+4 twistings, wherein N is, if applicable by rounding down, a number of twistings of the steel wires delimiting the hexagonal meshes to opposite sides. 
     
     
         13 . A production device for a braiding of a hexagonal netting with hexagonal meshes from steel wires, further comprising a high-tensile steel, according to  claim 1 , with at least one array of twisting units for an alternating twisting of steel wires with further steel wires which are guided on respectively opposite sides of the steel wires, and with at least one rotatable roller, which is supported downstream of the twisting units and has on a sheath surface dogs configured to engage into the newly braided hexagonal meshes, thus pushing or pulling the hexagonal netting forward, wherein the twisting units are configured to over-rotate the steel wires such that a rotation angle swept over by the twisting units during a twisting process is larger than a total twisting angle of the twisted regions delimiting the hexagonal meshes of the finished hexagonal netting, and/or that the rotatable roller is configured to over-expand a mesh width of the hexagonal meshes, in particular as compared to the mesh width of a finished hexagonal mesh, by a stretching unit, which is integrated in the rotatable roller, which is supported downstream of the rotatable roller or is arranged separately, being configured to stretch a finished hexagonal netting at least in a direction parallel to the mesh width at least by 30%. 
     
     
         14 . The production device according to  claim 13 , wherein the over-rotating of the intertwisted steel wires and/or the over-expanding of the hexagonal meshes is configured to compensate a rebound of the high-tensile steel wires, which are substantially more elastic as compared to a non-high-tensile steel. 
     
     
         15 . The production device according to  claim 13 , wherein the twisting units are configured to twist the steel wires at least M-fold with one another, wherein M is given by the formula M=U+0.5*G, and U is an uneven integer ≥3, which preferably corresponds to a number of twistings within a twisted region of the finished hexagonal netting which delimits a hexagonal mesh, and wherein G is any real number ≥1 and ≤3. 
     
     
         16 . (canceled) 
     
     
         17 . A production method for a braiding of a hexagonal netting with hexagonal meshes according to  claim 1 , wherein during the production of the hexagonal netting the steel wires are over-rotated in twisted regions of the hexagonal netting, and/or wherein the hexagonal meshes are over-expanded in a direction parallel to the mesh width at least by 30%. 
     
     
         18 . (canceled) 
     
     
         19 . A production method for a braiding of a hexagonal netting with hexagonal meshes, in particular by means of a production device according to  claim 13 , wherein during the production of the hexagonal netting the steel wires are over-rotated in twisted regions of the hexagonal netting, and/or wherein the hexagonal meshes are over-expanded in a direction parallel to the mesh width at least by 30%.