METAL SCREEN DEVICE

Description

State of the art

[0001] The invention relates to a method for producing a wire mesh according to the preamble of claim 1 and a wire mesh according to claim 3.

[0002] It has already been proposed that a wire in a wire mesh device have a corrosion protection coating. German patent application DE 10 2006 012 916 A1 describes a welded wire mesh for gabions with a zinc-aluminum coating. German patent application CN 205712139 U describes a chain-link fence made of non-high-strength wire with a zinc-aluminum coating. German patent application EP 1862 261 A2 describes a connecting clip for wire mesh panels with a corrosion protection coating. German patent applications CH 703 929 A2, CH 699 799 A2, and WO 99 / 43894 A1 each describe wire meshes made of high-strength steel wires, each with a Class B corrosion protection coating. The scientific publication by Wu Tong et al. "Single layer graphitic carbon nitride-modified graphene composite as a fiber coating for solid-phase microextraction of polycyclic aromatic hydrocarbons" (DOI: 10.1007 / S00604-017-2233-0) describes a graphene coating for stainless steel wires. The scientific publication by Salgueiro Azevedo et al., "Corrosion mechanisms of Zn(Mg,Al) coated steel in accelerated tests and natural exposure: 1. The role of electrolyte composition in the nature of corrosion products and relative corrosion rate" (DOI: 10.1016 / J.CORSCI.2014.05.014), describes a corrosion test procedure for steel wires.

[0003] The object of the invention is, in particular, to provide a generic device with high durability. This object is achieved according to the invention, in particular, by the features of claims 1 and 3, while an advantageous embodiment and further development of the invention can be found in the dependent claim. Advantages of the invention

[0004] The invention relates to a wire mesh device with at least two interlocking mesh elements, at least one of which is made of at least one single wire, a wire bundle, a wire strand, a wire rope and / or another longitudinal element with at least one wire made entirely of high-strength steel, apart from coatings, wherein the wire has at least one corrosion protection layer.

[0005] According to the invention, at least one section of a wire mesh consisting of the wire and bearing the corrosion protection layer exhibits a corrosion resistance of more than 1680 hours, preferably more than 2016 hours, advantageously more than 2520 hours, more preferably more than 3024 hours, and particularly preferably more than 3528 hours, in a climate change test. This advantageously results in high resistance of the wire, in particular the wire mesh device and / or a wire mesh, preferably a safety net, especially to corrosive environmental conditions, such as weather conditions. Advantageously, this also results in a long service life of the wire, in particular the wire mesh device and / or the wire mesh, thereby reducing maintenance and / or repair costs.Furthermore, increased reliability and / or safety of the wire mesh device and / or the wire mesh can be advantageously achieved.

[0006] According to the invention, the "wire mesh device" comprises a wire mesh. A "mesh element" is understood to be, in particular, a basic element of the wire mesh device, especially of the wire mesh, preferably of the safety net, which, by interlocking with adjacent basic elements, forms the wire mesh. The mesh element is, in particular, designed as a filament-like structure, especially a wire structure, for example, consisting of at least one single wire, at least one wire bundle, at least one strand of wire, and / or at least one wire rope. The filament-like structure, especially the wire structure, can, in particular, have two open ends or be closed. Preferably, the filament-like structure, especially the wire structure, lies, in an unloaded state, at least substantially in one plane.The net element can, in particular, have an irregular shape or, preferably, a regular shape, which at least partially represents the shape of a circle, a rhombus, and / or a uniform and / or irregular polygon. In particular, different net elements of the safety net can have different shapes; however, preferably the net elements have at least substantially the same shape. According to the invention, the net element is designed as a flattened helix.

[0007] In particular, the mesh element forms at least a partial helix of a mesh network. Preferably, "at least substantially identical" is to be understood as identical apart from manufacturing tolerances and / or within the scope of manufacturing possibilities.

[0008] In this context, "wire" is understood to mean, in particular, an elongated and / or thin and / or at least machine-bendable and / or flexible body. Advantageously, the wire has a cross-section that is at least substantially constant along its longitudinal direction, in particular circular or elliptical. The wire is particularly advantageously designed as a round wire. However, it is also conceivable that the wire is designed, at least partially or completely, as a flat wire, a square wire, a polygonal wire, and / or a profile wire. According to the invention, the wire is made entirely of metal, in particular a metal alloy. According to the invention, the wire is designed as a steel wire, in particular as a stainless steel wire.According to the invention, the wire, in particular the wire bundle, the wire strand, the wire rope and / or the other longitudinal element with the at least one wire, is made entirely of high-strength steel, apart from a coating. According to the invention, the wire is a high-strength steel wire. For example, the high-strength steel can be spring steel and / or wire steel and / or a steel suitable for wire ropes. According to the invention, the wire has a tensile strength of at least 800 N / mm², advantageously at least 1000 N / mm², particularly advantageously at least 1200 N / mm², preferably at least 1400 N / mm² and particularly preferably at least 1600 N / mm², in particular a tensile strength of about 1770 N / mm² or about 1960 N / mm².It is also conceivable that the wire has an even higher tensile strength, for example, a tensile strength of at least 2000 N / mm², or at least 2200 N / mm², or even at least 2400 N / mm². This allows for high load-bearing capacity, in particular high tensile strength and / or high stiffness perpendicular to the wire mesh. Furthermore, advantageous bending properties can be achieved. In particular, the wire, preferably a plurality of wires, is intended to form at least a portion of a wire mesh, in particular consisting of mesh elements, preferably coils. "Intended" is understood to mean, in particular, specifically programmed, designed, and / or equipped. The fact that an object is intended for a specific function is understood to mean, in particular, that the object fulfills and / or performs this specific function in at least one application and / or operating condition.

[0009] The term "corrosion protection" is understood to mean, in particular, a protective measure to prevent damage that can be caused by corrosion to components, especially metallic ones. Corrosion protection can, in particular, comprise active cathodic corrosion protection and / or passive corrosion protection. According to the invention, passive corrosion protection is achieved by means of a corrosion protection layer, preferably a corrosion protection coating. The term "section of wire" is understood to mean, in particular, a section of the wire forming the wire mesh device, especially the wire braid, which is preferably at least 1 cm, more preferably at least 3 cm, or most preferably at least 5 cm long.According to the invention, a "section of a wire mesh consisting of wire" is understood to be a wire mesh with at least two bending points, and preferably with at least five bending points, and with at least two interwoven mesh elements, preferably helixes, and preferably with at least five interwoven mesh elements, preferably helixes. According to the invention, a "bending point" is understood to be a point on a wire where the wire orientation changes by at least 60° within a length of the wire that is less than five wire diameters and preferably less than ten wire diameters.

[0010] According to the invention, a "climate change test" is understood to be a corrosion resistance test of the corrosion protection layer according to the specifications of the VDA (German Association of the Automotive Industry) recommendation VDA 233-102, which in particular involves, at least for a portion of the test period, misting and / or spraying at least one test piece with a salt spray and / or, at least for a portion of the test period, exposing the test piece to a temperature change from room temperature to sub-zero temperatures. By varying the temperature, relative humidity, and / or salt concentration to which the test piece is exposed, the reliability of a test procedure can advantageously be improved. In particular, test conditions can be advantageously adapted more closely to the real-world conditions to which the wire mesh device is exposed, especially during field use. According to the invention, the test piece is designed as a section of the wire of the wire mesh device.According to the invention, the climate change test is carried out in accordance with the usual boundary conditions for climate change tests known to a person skilled in the art, as listed in VDA Recommendation VDA 233-102 dated June 30, 2013. The climate change test is performed, in particular, in a test chamber. The conditions inside the test chamber during the climate change test are, in particular, strictly controlled. Specifically, strict requirements regarding temperature profiles, relative humidity, and salt spray durations must be observed during the climate change test. A test cycle of the climate change test is, in particular, divided into seven cycle parts. A test cycle of the climate change test lasts, in particular, one week. A cycle part lasts, in particular, one day. A test cycle comprises three different sub-test cycles. A sub-test cycle constitutes a cycle part.The three sub-inspection cycles comprise at least one cycle A, at least one cycle B, and / or at least one cycle C. During an inspection cycle, sub-inspection cycles run sequentially in the following order: Cycle B, Cycle A, Cycle C, Cycle A, Cycle B, Cycle B, Cycle A.

[0011] Cycle A includes, in particular, a salt spray phase. During the salt spray phase, a salt spray mist is sprayed, especially within the test chamber. The salt solution sprayed during Cycle A consists, in particular, of a solution of sodium chloride in distilled water, preferably water that has been boiled before preparation and preferably has an electrical conductivity of no more than 20 µS / cm at (25 ± 2) °C, with a mass concentration in the range of (10 ± 1) g / L. The test chamber for the climate change test has, in particular, an internal volume of at least 0.4 m³. During operation of the test chamber, the internal volume is homogeneously filled with salt spray mist. The upper parts of the test chamber are preferably designed such that no droplets forming on the surface can fall onto a test specimen.Advantageously, the temperature during the spraying of the salt spray mist, particularly within the test chamber, is (35 ± 0.5) °C, the temperature preferably being measured at least 100 mm away from a wall of the test chamber.

[0012] Cycle B includes, in particular, a working phase during which the temperature is maintained at room temperature (25 °C) and the relative humidity at a typical room humidity (70%). During this working phase, the test chamber can be opened and the test piece inspected and / or checked.

[0013] Cycle C includes, in particular, a freezing phase. During the freezing phase, the test chamber temperature is maintained at a value below 0 °C, preferably -15 °C.

[0014] The term "corrosion resistance" is understood to mean, in particular, the durability of a material during a corrosion test, for example, a climate change test, especially in accordance with the VDA recommendation VDA 233-102 of June 30, 2013, a salt spray test, especially in accordance with the standard DIN EN ISO 9227:2006, a sulfur dioxide test, especially in accordance with the standard DIN 50018:1997-6 and / or an aging test, during which the functionality of a test piece is maintained and / or preferably a period of time during which a threshold value of a corrosion parameter is undercut in a test piece during a corrosion test, for example, a climate change test, a salt spray test, a sulfur dioxide test and / or an aging test.The phrase "functionality is maintained" means, in particular, that material properties of a test piece important for the functionality of a wire mesh, such as tensile strength and / or brittleness, remain essentially unchanged. The phrase "a material property remains essentially unchanged" means, in particular, that a change in a material parameter and / or a material property is less than 10%, preferably less than 5%, preferably less than 3%, and most preferably less than 1% compared to a baseline value before the corrosion test. Preferably, the corrosion parameter is defined as a percentage of the total surface area of ​​a test piece on which dark brown rust (DBR) is visible, particularly visually. The threshold value of the corrosion parameter is preferably 5%.Preferably, corrosion resistance is defined as the period of time until dark brown rust (DBR) is visually detectable on 5% of the total surface area of ​​a test specimen, particularly on surfaces exposed to salt spray in climate change tests and / or salt spray tests. More preferably, corrosion resistance is defined as the time between the start of the climate change test, the salt spray test, the sulfur dioxide test, and / or the aging test and the appearance of 5% DBR on the surface of the test specimen.

[0015] According to the invention, the corrosion protection comprises at least one corrosion protection layer. The corrosion protection layer can have a mass per unit area, particularly on the surface of at least a section of the wire, preferably the entire wire, of at least 215 g / m², preferably at least 255 g / m², advantageously at least 275 g / m², preferably at least 300 g / m², and particularly preferably at least 400 g / m², especially when the wire diameter is at most 10 mm, preferably at most 6 mm, advantageously at most 5 mm, preferably at most 4 mm, and particularly preferably at least 2 mm. This advantageously results in high durability of the wire mesh device. In particular, it increases the service life of a wire mesh.Advantageously, a thick corrosion protection layer provides effective and long-lasting protection against corrosion for underlying materials, such as high-strength steel. In particular, the corrosion protection layer is designed as a zinc coating. Preferably, the corrosion protection layer is at least partially designed as an active corrosion protection layer, which in particular provides anodic corrosion protection. It is also conceivable that the corrosion protection layer comprises multiple coatings, especially superimposed ones, particularly with different material properties of at least one layer. Alternatively and / or additionally, it is conceivable that the corrosion protection layer is at least partially designed as a passive corrosion protection layer and / or a cathodic corrosion protection layer.According to the invention, the corrosion protection layer meets at least the requirements specified in the DIN EN 10264-2:2012-3 standard for a minimum quantity of a coating with a corrosion protection layer for class A wires.

[0016] Furthermore, it is proposed that the corrosion protection include at least one corrosion protection layer, which is designed as a zinc-aluminum coating, particularly with an aluminum content of approximately 5%. This advantageously results in high resistance of the wire mesh device. In particular, it increases the service life of a wire mesh. Advantageously, such a corrosion protection layer provides effective and long-lasting protection against corrosion for underlying materials, such as high-strength steel. Advantageously, a zinc-aluminum coating provides active anodic corrosion protection. In addition, a zinc-aluminum coating advantageously has a smooth surface. Advantageously, a zinc-aluminum coating adheres well to a steel surface, particularly better than a pure zinc coating.In particular, the zinc-aluminum coating has a mass per unit area, especially at least on the surface of at least a section of the wire, preferably the entire wire, of at least 150 g / m², preferably at least 215 g / m², advantageously at least 255 g / m², preferably at least 300 g / m², and particularly preferably at least 350 g / m². In particular, the aluminum content of the corrosion protection layer is approximately 5%, which advantageously enables a eutectic structure of the zinc-aluminum alloy.

[0017] Furthermore, it is proposed that the zinc-aluminum coating comprise at least one additive other than aluminum and / or zinc, preferably magnesium, which in particular includes at least 0.5% of the corrosion protection layer. This would advantageously further increase the resistance of the wire mesh device. Alternatively, the additive could comprise a metal other than magnesium and / or a plurality of different metals. It is also conceivable that the zinc-aluminum coating could comprise at least one further additive other than aluminum, magnesium, and / or zinc.

[0018] Furthermore, it is proposed that at least one section of the wire has corrosion protection, in particular a corrosion protection layer, which, without damage, and in particular without breakage, withstands at least M re-bending of the wire around at least one bending cylinder with a diameter of at most 8d, preferably at most 6d, more preferably at most 4d, and particularly preferably at most 2d, each time by at least 90° in opposite directions, wherein M can be determined, optionally by rounding, as C·R -0.5< ·d -0.5< and wherein d is a diameter of the wire in mm, R is a tensile strength of the wire in N mm -2< and C is a factor of at least 750 N 0.5< mm 0.5< , preferably at least 850 N 0.5< mm 0.5< , advantageously at least 1000 N 0.5< mm 0.5< , preferably at least 1300 N 0.5< mm 0.5< and particularly preferably at least 1500 N 0.5< mm 0.5< is.This allows for advantageous properties regarding processability and / or manufacturability. Furthermore, a robust and / or particularly corrosion-resistant wire mesh device, especially wire braid, can be provided. High durability can also be achieved. Additionally, cracking, detachment, and / or damage to corrosion protection, especially a corrosion protection layer, during the production of wire mesh devices, especially wire braids, can be advantageously avoided. In particular, test runs during the production of wire mesh devices, especially wire braids, can be advantageously dispensed with, at least to a large extent. Furthermore, suitable wires for a wire mesh device, especially for a wire braid, with high resistance, particularly to corrosion, and preferably with simultaneously high load-bearing capacity, can be identified easily, quickly, and / or reliably.In particular, a significantly more stringent and / or load-specific selection method for a suitable wire can be provided compared to a back-and-forth bending test according to the standards DIN EN 10218-1:2012-03 and DIN EN 10264-2:2012-03. Preferably, the wire is bent around two opposing, identically designed bending cylinders during the back-and-forth bending test. Advantageously, the bending cylinders are designed to ensure that the back-and-forth bending test is performed without deformation and / or damage. "Damage-free" is understood to mean, in particular, free from cracks, delamination, fractures, and / or comparable damage occurring during bending.

[0019] Furthermore, it is proposed that at least one section of the wire has corrosion protection, in particular a corrosion protection layer, which withstands N twisting cycles of the wire without damage, in particular without breakage, in which N can be determined, optionally by rounding, as B·R -0.5< ·d -0.5< and where d is a diameter of the wire in mm, R is a tensile strength of the wire in N mm -2< and B is a factor of at least 960 N 0.5< mm 0.5< , preferably at least 1050 N 0.5< mm 0.5< , advantageously at least 1200 N 0.5< mm 0.5< , preferably at least 1500 N 0.5< mm 0.5< and particularly preferably at least 2000 N 0.5< mm 0.5< . This can advantageously achieve a high resistance of a wire mesh device, in particular a wire mesh, especially against corrosion.Furthermore, the cracking, detachment, and / or damage of corrosion protection, in particular a corrosion protection layer, during the manufacture of wire mesh devices, especially wire braids, can be advantageously avoided. In particular, test runs during the manufacture of wire mesh devices, especially wire braids, can be advantageously dispensed with, at least to a large extent. Moreover, suitable wires for a wire mesh device, especially a wire braid, with high resistance, particularly to corrosion, and preferably with simultaneously high load-bearing capacity, can be identified easily, quickly, and / or reliably. In particular, a significantly more stringent and / or load-specific selection procedure for a suitable wire can be provided compared to a twist test according to the standards DIN EN 10218-1:2012-03 and DIN EN 10264-2:2012-03.The term "twisting" refers in particular to the twisting of a clamped wire around a longitudinal axis.

[0020] Furthermore, it is proposed that at least one section of the wire, in at least one, and in particular an additional, test test, has corrosion protection, in particular a corrosion protection layer, which withstands, without damage, in particular without breakage, winding of the wire around a winding mandrel whose diameter corresponds at least substantially to the diameter of the wire. This advantageously achieves a high resistance of a wire mesh device, in particular a wire braid, especially against corrosion. Furthermore, cracking, detachment, and / or damage to corrosion protection, in particular a corrosion protection layer, can be advantageously avoided during the manufacture of wire mesh devices, in particular wire braids. In particular, test runs during the manufacture of wire mesh devices, in particular wire braids, can be advantageously dispensed with, at least to a large extent.Furthermore, suitable wires for a wire mesh device, in particular for a wire braid, with high resistance, especially to corrosion, and preferably with simultaneously high load-bearing capacity, can be identified easily, quickly, and / or reliably. In particular, when the wire is wound around the winding mandrel, it is bent at least substantially in a spiral shape by at least 360° around the mandrel.

[0021] Furthermore, a wire mesh, particularly a safety net, preferably for protection against rockfall, is proposed, comprising a wire mesh device with a plurality of interlocking mesh elements, particularly exceeding two, which are at least partially helical. This advantageously results in a wire mesh with high resistance, especially to corrosion, particularly to corrosive environmental conditions such as weathering. Advantageously, a long service life of the wire mesh can be achieved, thereby reducing maintenance and / or repair costs. Furthermore, increased reliability and / or safety of the wire mesh can be advantageously provided. In particular, the wire mesh is designed as a wire braid with a plurality of interwoven helixes.Different helixes contact each other, particularly in areas of the helix's sharpest bends. The wire mesh is used in various applications, including slope stabilization, safety fencing, debris fences, rockfall protection nets, barrier fences, fish farming nets, predator protection nets, enclosure fences, tunnel protection, mudslide protection, motorsport safety fencing, road fencing, avalanche protection, and similar uses. Due to its high strength and / or load-bearing capacity, it is also suitable for covering and / or encasing structures such as power plants, factories, residential buildings, and other buildings, as well as for explosion protection, projectile protection, shielding against flying objects, safety netting, crash barriers, and similar purposes.The wire mesh can be laid out, arranged, and / or mounted horizontally, vertically, or obliquely, particularly relative to a substrate. In particular, the wire mesh is planar. Advantageously, the wire mesh is regularly and / or periodically structured in at least one direction. Preferably, the wire mesh is rollable and / or unrollable, particularly around an axis parallel to the main direction of extension of the helix. In particular, a roll wound from the wire mesh can be unrolled in a direction perpendicular to the main direction of extension of the helix.

[0022] Furthermore, the invention proposes a method for producing a wire mesh in which the wire mesh is produced from wire mesh devices. This advantageously allows a wire mesh with high resistance, particularly to corrosion, especially to corrosive environmental conditions, such as weather conditions.

[0023] Furthermore, a method for identifying a suitable wire, particularly one made of high-strength steel, for a wire mesh device, preferably for a wire mesh, is proposed, in which the corrosion resistance of a test piece of the wire, particularly a test piece of a wire mesh formed from the wire, is determined by means of a climate change test, a salt spray test, a sulfur dioxide test, and / or an aging test. This advantageously allows a wire, particularly a wire mesh device, preferably a wire mesh, with high resistance, especially to corrosion, and particularly to corrosive environmental conditions, such as weather conditions, to be obtained. According to the invention, the suitability of a wire for producing a wire mesh can be determined before the finished wire mesh is produced.This allows for the advantageous avoidance of defective and / or scrap production, thereby reducing costs in particular. According to the invention, a wire that has demonstrated sufficient corrosion resistance in climate change testing is selected for a manufacturing process. Preferably, a wire that has demonstrated insufficient corrosion resistance in climate change testing, salt spray testing, sulfur dioxide testing, and / or aging testing, particularly resistance below 500 hours, preferably 600 hours, advantageously 700 hours, preferably 800 hours, and most preferably 1000 hours, is rejected before a manufacturing process.

[0024] Furthermore, according to the invention, it is proposed that the wire for forming a mesh element is bent with a bending radius, in particular a maximum one, which in each step is greater than 5 mm, preferably greater than 6 mm, advantageously greater than 7 mm, preferably greater than 9 mm, and particularly preferably less than 10 mm. This advantageously prevents damage, in particular cracking and / or detachment, of the corrosion protection, especially the corrosion protection layer, particularly during a manufacturing process, thereby advantageously achieving a high resistance and / or service life of a wire mesh device produced in this way.

[0025] Furthermore, according to the invention, it is proposed that the wire for forming a mesh element be bent at a bending speed, preferably below 360 degrees / s, preferably below 270 degrees / s, advantageously below 180 degrees / s, preferably below 90 degrees / s, and particularly preferably above 45 degrees / s. This advantageously prevents damage, in particular cracking and / or detachment, of the corrosion protection, especially the corrosion protection layer, particularly during a manufacturing process, thereby advantageously achieving a high resistance and / or service life of a wire mesh device produced in this way.

[0026] Furthermore, according to the invention, it is proposed that, during the coating of a wire, the coating temperature, in particular its maximum temperature, remains below 440 °C, preferably below 435 °C, advantageously below 430 °C, preferably below 425 °C, and most preferably above 421 °C in each work step. This advantageously prevents damage, in particular cracking and / or detachment, of the corrosion protection, especially the corrosion protection layer, particularly during a manufacturing process, thereby advantageously achieving high resistance and / or service life of a wire mesh device produced in this way.

[0027] Furthermore, it is proposed that the heat generated during the coating process be used to increase the wire's strength, particularly its tensile strength. This can advantageously increase efficiency, especially by allowing heat generated in one process to be used in another. Moreover, excessive brittleness of a coated wire can be avoided, particularly by taking into account the additional carbon loss from the steel, of which the wire is at least partially composed, during the coating process to adjust the steel's strength. Drawings

[0028] Further advantages become apparent from the following description of the drawings. The drawings illustrate seven exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0029] They show: Fig. 1 a schematic view of a section of a wire mesh with a wire mesh device, Fig. 2 a sectional view of a wire of the wire mesh device with corrosion protection and a sectional view of another wire with corrosion protection, Fig. 3 a schematic view of a bending unit, Fig. 4 a schematic view of a twisting unit, Fig. 5 a schematic view of a winding unit, Fig. 6 a perspective, schematic view of a test chamber with a test device, Fig. 7 a schematic, perspective view of a holding unit of the test device, Fig. 8 a time-lapse diagram of a climate change test in the test chamber, Fig. 9 a temperature curve and a relative humidity curve during a partial cycle of the climate change test, Fig. 10 a temperature curve and a relative humidity curve during another partial cycle of the climate change test, Fig.Fig. 11 a temperature curve and a relative humidity curve during an additional further sub-cycle of the climate change test, Fig. 12 a flowchart of a process, Fig. 13 a temperature-time diagram, Fig. 14 a concentration-time diagram, Fig. 15 a concentration-time diagram, Fig. 16 a sectional view of a wire with an alternative corrosion protection, Fig. 17 a sectional view of a wire with a further alternative corrosion protection, Fig. 18 a sectional view of a wire not according to the invention with a second further alternative corrosion protection not according to the invention, Fig. 19 a sectional view of a wire not according to the invention with a third further alternative corrosion protection not according to the invention, Fig. 20 a sectional view of a wire not according to the invention with a fourth further alternative corrosion protection not according to the invention and Fig.21 a schematic view of a section of a further wire mesh not according to the invention with a wire mesh device not according to the invention . Description of the exemplary implementations

[0030] Fig. 1 Figure 1 shows a schematic view of a section of a wire mesh 44a with a wire mesh device. The wire mesh 44a is designed as a safety net for protection against rockfall. The wire mesh device is also designed as a safety net device. The wire mesh device has a plurality of mesh elements 10a. The wire mesh 44a has a plurality of interlocking mesh elements 10a exceeding two. The mesh elements 10a interlock with each other. The mesh elements 10a are interwoven. The mesh elements 10a form a wire mesh 18a. The mesh elements 10a are helically shaped. The mesh elements 10a are designed as a helix 58a. The mesh element 10a has a

[0031] The principal extension direction 60a is defined as a direction that runs parallel to the longest edge of the smallest geometric cuboid that just completely encloses the object. The principal extension directions 60a of the mesh elements 10a are aligned parallel to each other. The mesh element 10a has the shape of a flattened helix. The mesh element 10a has a sequence of alternating legs 62a, 64a. The mesh element 10a has bends 66a. A bend 66a connects two legs 62a, 64a. Interlocking mesh elements 10a touch each other in the extended state in a proximity 68a to the bends 66a, preferably at the bends 66a. The legs 62a, 64a form a bending angle 70a. Legs 62a, 64a have a bending radius of 46a.The bending radius 46a of various bending points 66a of a network element 10a and / or different network elements 10a is constant. The network element 10a comprises a single wire consisting of a wire 12a. Alternatively, the network element 10a can comprise a wire bundle with the wire 12a, a wire strand with the wire 12a, a wire rope with the wire 12a and / or another longitudinal element with the wire 12a.

[0032] Fig. 2 Figure 1 shows a cross-section 22a of wire 12a formed perpendicular to a direction of extension 72a of wire 12a. Wire 12a has a circumference 20a. Wire 12a has a diameter 24a. The diameter 24a of wire 12a in Fig. 2The diameter of the wire in the illustrated embodiment is 4 mm. The wire 12a has a wire surface 26a. The wire 12a has a wire core 76a. The wire 12a has corrosion protection 14a. The wire 12a has a coating 30a. The corrosion protection 14a is designed as a coating 30a. The coating 30a is designed as a corrosion protection layer 16a. Apart from the coating 30a, the wire 12a is made of a high-strength steel 74a. The wire core 76a is made of a high-strength steel 74a. The corrosion protection layer 16a has in the Fig. 2In the illustrated embodiment, the surface mass is at least 300 g / m². The corrosion protection layer 16a completely encloses the wire core 76a in the circumferential direction. The corrosion protection layer 16a has a constant thickness 84a. The corrosion protection layer 16a is designed as a zinc coating 80a. The corrosion protection layer 16a is metallurgically bonded to the wire core 76a. "Metallurgically bonded" means, in particular, that the components are held together by atomic or molecular forces, such as during soldering, welding, bonding, zinc plating, electroplating, and / or vulcanizing.

[0033] Fig. 3Figure 1 shows a schematic representation of a bending unit 86a for performing a back-and-forth bending test on a wire 12a. The bending unit 86a has clamping jaws 88a, 90a, which are designed for clamping a test piece 92a of wire 12a. The test piece 92a is preferably a section of the wire 12a and / or the wire mesh 18a of the wire mesh device. In the case shown, it is a test piece 92a of wire 12a. The bending unit 86a has a bending lever 94a, which is pivotably mounted. The bending lever 94a has drivers 96a, 98a for the test piece 92a of wire 12a. The bending unit 86a has a bending cylinder 32a around which the test piece 92a of wire 12a is bent during the reciprocating bending test. The bending unit 86a has a further bending cylinder 100a, which is identical in design to the bending cylinder 32a.The additional bending cylinder 100a is arranged opposite the bending cylinder 32a. During the reciprocating bending test, the bending lever 94a alternately bends the test piece 92a of the wire 12a by at least 90° around the bending cylinder 32a and the additional bending cylinder 100a. The reciprocating bending test is usually carried out until the coating 30a, in particular the corrosion protection layer 16a of the test piece 92a of the wire 12a, is damaged, in particular breaks, cracks, tears and / or detaches, in order to test the load-bearing capacity and / or flexibility of the coating 30a, in particular the corrosion protection layer 16a. The coating 30a, in particular the corrosion protection layer 16a, of the wire 12a withstands at least M times the wire 12a being bent back and forth by at least 90° in opposite directions 36a, 38a around the bending cylinders 32a, 100a without damage.The bending cylinders 32a, 100a have a diameter 34a of at most 8d, where d is the diameter 24a of the wire 12a in millimeters. The size M can be determined, optionally by rounding down, as C·R -0.5< ·d -0.5<. R comprises a tensile strength of the wire 12a in N·mm -2<. In the illustrated embodiment, the tensile strength of the wire 12a is 1570 N·mm -2<. C comprises a constant factor. In the illustrated embodiment, C is 750 N 0.5< ·mm 0.5<.

[0034] Fig. 4Figure 1 shows a schematic representation of a twisting unit 102a for performing a twisting test on a wire 12a. The twisting unit 102a has a base unit 112a. The twisting unit 102a has a twisting lever 104a, which is rotatably mounted about an axis 106a. The twisting unit 102a can be converted into the bending unit 86a and vice versa. When converting the bending unit 86a and / or the twisting unit 102a, the bending lever 94a and the twisting lever 104a are exchanged. The twisting unit 102a has clamping jaws 88a, 90a, which are designed for clamping a test piece 92a of wire 12a in the base unit 112a. The test piece 92a is preferably a section of the wire 12a and / or the wire mesh 18a of the wire mesh device. In the case shown, it is a test piece 92a of the wire 12a.The twisting lever 104a has clamping jaws 108a, 110a, which are designed for clamping a test piece 92a of wire 12a in the twisting lever 104a. The twisting lever 104a is designed to twist the test piece 92a by rotating the twisting lever 104a about the axis 106a. During rotation of the twisting lever 104a, the base unit 112a remains stationary. In the twisting test, the twisting lever 104a twists the test piece 92a of wire 12a a multiple of 360° about an axis 106a parallel to a longitudinal extension of the test piece 92a. The twisting test is usually carried out until the coating 30a, in particular the corrosion protection layer 16a of the test piece 92a of the wire 12a, is damaged, in particular breaks, cracks, tears and / or detaches, in order to test the load-bearing capacity and / or flexibility of the coating 30a.The coating 30a, in particular the corrosion protection layer 16a, of the wire 12a withstands at least N twisting cycles of the wire 12a without damage. The value N can be determined, optionally by rounding down, as B·R -0.5< ·d -0.5<. B comprises a constant factor. In the illustrated embodiment, B is 960 N 0.5< mm 0.5< .

[0035] Fig. 5Figure 1 shows a schematic representation of a winding unit 114a for conducting a winding test of a wire 12a. The winding unit 114a has a winding mandrel 40a. The winding mandrel 40a is designed to provide a winding surface 116a for winding a wire 12a. The winding mandrel 40a has a diameter 42a. The diameter 42a is an outer diameter 118a of the winding mandrel 40a, which corresponds at least substantially to a diameter 24a of the wire 12a. It is conceivable that the winding mandrel 40a is formed from a section of the wire 12a, in particular an unbent section. In a winding test, the wire 12a is wound at least once around the winding mandrel 40a by 360°, preferably in a spiral. The corrosion protection 14a, in particular the corrosion protection layer 16a, survives without damage a winding of the wire 12a around the winding mandrel 40a.

[0036] Fig. 6Figure 1 shows a test device for testing the corrosion resistance of at least one test piece 92a of wire 12a and / or one test piece 92a of wire mesh 44a. The test device comprises a test chamber 120a. The test chamber 120a is designed as a box enclosed on all sides. The test chamber 120a has an opening 124a that can be closed with a flap 122a. The opening 124a is designed to move test pieces 92a into and / or out of the test chamber 120a. The test chamber 120a is designed to provide a test environment for a climate change test, a salt spray test, and / or a sulfur dioxide test, and / or to perform a climate change test, a salt spray test, and / or a sulfur dioxide test. The test device includes a control unit 134a.A "control and / or regulating unit 134a" shall be understood to mean, in particular, a unit with at least one control electronics unit. A "control electronics unit" shall be understood to mean, in particular, a unit with a processor unit 136a and a memory unit 138a, as well as an operating program stored in the memory unit 138a. The control and / or regulating unit 134a is designed, at least, to control the climate change test, the salt spray test, and / or the sulfur dioxide test. The test device includes a distribution unit 126a. The distribution unit 126a is arranged in an interior 130a of the test chamber 120a. The distribution unit 126a is designed to produce and / or distribute a salt spray in the test chamber 120a.

[0037] Alternatively, the distribution unit 126a is designed to generate a sulfur dioxide concentration for a sulfur dioxide test in the test chamber 120a and / or to distribute sulfur dioxide in the test chamber 120a. Alternatively or additionally, the distribution unit 126a is designed to regulate the relative humidity inside the test chamber 120a, in particular to increase, decrease, and / or maintain it at a constant level. The distribution unit 126a has an inlet and / or outlet 132a. A salt solution for generating the salt spray and / or a sulfur dioxide solution and / or sulfur dioxide gas can be supplied to and / or discharged from the distribution unit 126a and / or the test chamber 120a via the inlet and / or outlet 132a. The distribution unit 126a can be controlled and / or regulated by means of the control and / or regulation unit 134a. The test device includes a heating and / or cooling unit 128a.The heating and / or cooling unit 128a is designed to regulate the temperature of the interior 130a of the test chamber 120a. The heating and / or cooling unit 128a is designed to heat and / or cool the interior 130a of the test chamber 120a in a controlled manner. The heating and / or cooling unit 128a is located at least partially within the interior 130a of the test chamber 120a. The heating and / or cooling unit 128a is located at least partially within a wall 140a of the test chamber 120a. The heating and / or cooling unit 128a can be controlled and / or regulated by means of the control and / or regulating unit 134a.

[0038] The test device has a holding unit 54a (see Fig. 7The holding unit 54a is designed to hold at least one test piece 92a of wire 12a and / or the wire mesh 18a formed from wire 12a. The holding unit 54a is also designed to hold a reference wire 56a and / or a reference wire mesh. Test pieces 92a positioned in the holding unit 54a can be aligned parallel to one another. Test pieces 92a positioned in the holding unit 54a are arranged such that they offer at least substantially the same surface area for corrosion in the test chamber 120a. The holding unit 54a is made of a corrosion-resistant material, for example, plastic. The holding unit 54a has receptacles 150a for receiving test pieces 92a and / or reference wires 56a. The test pieces 92a and / or reference wires 56a can be clipped into the holders 150a. The test device includes a stand unit 142a.The stand unit 142a is designed to position the holding unit 54a in the test chamber 120a, in particular in accordance with the requirements of the standard DIN EN ISO 9227:2006. The stand unit 142a holds the holding unit 54a at an angle 144a of 20° to the vertical. The test device includes a corrosion measuring unit 146a. The corrosion measuring unit 146a is designed to measure the progress and / or status of corrosion. The corrosion measuring unit 146a determines the status and / or progress of corrosion using an optical method, in particular by means of a camera 148a of the corrosion measuring unit 146a.

[0039] The wire 12a, in particular the wire mesh 18a consisting of the wire 12a, with the corrosion protection 14a, in particular the corrosion protection layer 16a, exhibits a corrosion resistance of more than 1680 hours in a climate change test. Furthermore, the wire 12a, in particular at least the wire mesh 18a consisting of the wire 12a, with the corrosion protection 14a, in particular the corrosion protection layer 16a, exhibits a corrosion resistance in the climate change test that is higher than that of another wire 78a.

[0040] The additional wire 78a is designed as a reference wire 56a. The additional wire 78a has a circumference 20a that is at least substantially identical to that of wire 12a. The additional wire 78a has a cross-section 22a that is at least substantially identical to that of wire 12a. The additional wire 78a has a diameter 24a that is at least substantially identical to that of wire 12a. The additional wire 78a has a wire surface 82a. The additional wire 78a has a zinc coating 80a. The zinc coating 80a has a mass per unit area of ​​at least 115 g / m². The zinc coating 80a has a mass per unit area of ​​at most 215 g / m². The additional wire 78a meets at least the requirements of a Class B wire according to the standard DIN EN 10264-2:2012-03. From the additional wire 78a, a wire mesh shaped at least essentially identical to the wire mesh 18a can be produced.

[0041] Fig. 8Figure 1 shows a time-based flowchart of the climate change test. The climate change test has a test cycle 256a. Test cycle 256a is divided into sub-cycles. The sub-cycles comprise cycle A 238a, cycle B 240a, and cycle C 242a. The temporal sequence of the sub-cycles in test cycle 256a is shown in Figure 2. Fig. 8 This is illustrated by a time axis 254a. The duration of a sub-cycle is one day. The duration of the test cycle 256a is one week.

[0042] Figure 9 , 10 and 11 show temperature curves 246a of the test chamber temperature 48a and relative humidity curves 244a of the relative humidity in the test chamber 120a during cycle A 238a ( Fig. 9 ), cycle B 240a ( Fig. 10 ) and cycle C 242a ( Fig. 11The test chamber temperature (48a) is plotted on ordinate 196a on the left side of the diagrams. Relative humidity is plotted on further ordinates (248a) on the right side of the diagrams. Time in hours is plotted on abscissa 198a.

[0043] Cycle A 238a (see Fig. 9The test begins with a 3-hour salt spray phase 250a. During the salt spray phase 250a, the test chamber 120a is filled with a salt spray mist via the distribution unit 126a. During the salt spray phase 250a, the test chamber temperature 48a is 35 °C. Following the salt spray phase 250a, the test chamber temperature 48a increases from 35 °C to 50 °C within two hours and is maintained at this value for a further 15 hours. Afterward, the test chamber temperature 48a decreases to 35 °C within four hours. The relative humidity decreases from 100% to 50% within six hours after the salt spray phase 250a and then gradually increases to 95% over eight hours. The relative humidity remains at 95% until the end of cycle A 238a after a further five hours.

[0044] Cycle B 240a (see Fig. 10The test begins with a 3-hour drop in the test chamber temperature 48a from 35 °C to 25 °C, which is then maintained for another 3 hours. Afterward, the test chamber temperature 48a rises to 50 °C within five hours. Following another nine hours at this temperature, the test chamber temperature 48a drops back down to 35 °C within four hours at the end of cycle B 240a. The relative humidity initially falls from 95% to 70% within three hours and remains at this value for ten hours. Afterward, the relative humidity gradually increases to 95% over six hours. The relative humidity remains at 95% until the end of cycle B 240a after a further five hours.

[0045] Cycle C 242a (see Fig. 11The test begins with a 4-hour drop in the test chamber temperature 48a from 35 °C to -15 °C, which is maintained at this temperature for a further five hours. During these five hours, the test chamber temperature 48a is below freezing. The test chamber 120a is in a freezing phase 252a. Following the freezing phase 252a, the test chamber temperature 48a rises to 50 °C within five hours. After another six hours at this temperature, the test chamber temperature 48a drops to 35 °C within four hours at the end of cycle C 242a. The relative humidity initially drops from 95%. During the freezing phase 252a, the relative humidity is very low. After the end of the freezing phase 252a and after the test chamber temperature 48a rises above freezing, the relative humidity remains at 70% for three hours. After that, the relative humidity gradually increases to 95% over five hours.The relative humidity remains at 95% until the end of cycle C 242a after a further five hours.

[0046] The wire 12a, in particular the wire mesh 18a consisting of the wire 12a, with the corrosion protection 14a, in particular the corrosion protection layer 16a, exhibits a corrosion resistance of more than 500 hours in a test test using a salt spray test. The wire 12a, in particular at least the wire mesh 18a consisting of the wire 12a, with the corrosion protection 14a, in particular the corrosion protection layer 16a, also exhibits a corrosion resistance in the test test using the salt spray test that is higher than the corrosion resistance of another wire 78a.

[0047] The wire 12a with the corrosion protection 14a, in particular the wire mesh 18a consisting of the wire 12, with the corrosion protection 14a, in particular the corrosion protection layer 16a, also exhibits a corrosion resistance of more than 500 hours in an additional test test using a sulfur dioxide test. The wire 12a, in particular a wire mesh 18a consisting of the wire 12a, with the corrosion protection 14a, in particular the corrosion protection layer 16a, exhibits a corrosion resistance in the additional test test using the sulfur dioxide test that is higher than the corrosion resistance of the further wire 78a.

[0048] The wire 12a, in particular a wire mesh 18a consisting of the wire 12a, with the corrosion protection 14a, in particular the corrosion protection layer 16a, exhibits significantly less corrosion during an aging test within a defined period than the other wire 78a subjected to the same aging test simultaneously. The corrosion, in particular the degree of corrosion, of a wire 12a, 78a can be estimated based on the number and / or total area of ​​corroded spots on a wire surface 26a, 82a of a wire 12a, 78a. During the aging test, test specimens 92a of wires 12a and / or wire meshes 18a are positioned in at least one, preferably at least two, different storage positions, in particular a vertical storage position and / or a horizontal storage position and / or an inclined storage position, in particular by aging.

[0049] Fig. 12Figure 1 shows a flowchart for processes for manufacturing a wire mesh device and / or a wire mesh 44a, for identifying a suitable wire 12a, and / or for a test procedure for verifying corrosion resistance. In at least one process step 152a, the wire 12a is manufactured from the high-strength steel 74a. In at least one process step 154a, the wire 12a is coated with the coating 30a. In at least one process step 156a, the wire 12a is coated during the coating process at a coating temperature that remains below 430 °C in each step. In at least one process step 158a, heat acting on the wire 12a during the coating process is used to increase the tensile strength of the wire 12a.

[0050] In at least one process step 160a, a wire 12a provided with corrosion protection 14a and / or a corrosion protection layer 16a is selected for a corrosion resistance test. In at least one process step 176a, the selection of the wire 12a for the corrosion resistance test is made dependent on a test of the corrosion protection layer 16a by means of a winding test. Wires 12a with corrosion protection layers 16a that fail in the winding test are rejected. In at least one process step 180a, the selection of the wire 12a for the corrosion resistance test is made dependent on a test of the corrosion protection layer 16a by means of a twisting test. Wires 12a with corrosion protection layers 16a that fail in the twisting test are rejected.In at least one process step 182a, the selection of the wire 12a for the corrosion resistance test is made dependent on a test of the corrosion protection layer 16a by means of a back-and-forth bending test. Wires 12a with corrosion protection layers 16a that fail in the back-and-forth bending test are rejected.

[0051] In at least one process step 178a, a suitable wire 12a for the wire mesh device and / or for the wire mesh 44a with high corrosion resistance is determined. The corrosion resistance of a test piece 92a of the wire 12a and / or the wire mesh 18a is determined in at least one process step 236a by means of the climate change test, in at least one process step 164a by means of the salt spray test, in at least one process step 162a by means of the sulfur dioxide test, and / or in at least one process step 166a by means of the aging test.

[0052] In at least one process step 172a, a test chamber temperature 48a is varied during the salt spray test (see Fig. 13 ). In the Fig. 13 The temperature-time diagram 194a shows two temperature profiles 200a and 202a. Temperature is plotted on the ordinate 196a and time on the abscissa 198a. One temperature profile 200a shows a sinusoidal curve. Another temperature profile 202a shows a step pyramid-shaped curve. In at least one process step 174a, a salt concentration 50a is varied during the salt spray test (see figure). Fig. 14 ). In the Fig. 14The concentration-time diagram 204a shows two concentration curves, 206a and 208a. Concentration is plotted on the ordinate (196a) and time on the abscissa (198a). One concentration curve, 206a, shows a sinusoidal curve. Another concentration curve, 208a, shows a step pyramid shape.

[0053] In at least one process step 168a, a test chamber temperature 48a is varied during the sulfur dioxide test (see Fig. 13 ). In at least one process step 170a, a sulfur dioxide concentration 52a is varied during the sulfur dioxide test (see Fig. 15 ). In the Fig. 15The concentration-time diagram 210a shows two concentration curves, 214a and 216a. The concentration is plotted on the ordinate (196a) and the time on the abscissa (198a). One concentration curve, 214a, shows a sinusoidal curve. Another concentration curve, 216a, shows a step pyramidal curve.

[0054] In at least one process step 184a, a wire mesh 44a is produced from wire mesh devices. In at least one process step 186a, a wire 12a made of a high-strength steel 74a is formed into coils 58a and / or into ring-shaped, self-contained mesh elements 10a (see...). Fig. 21) bent. In at least one process step 188a, the wire 12a is bent to form a network element 10a with a bending radius 46a, which is greater than 5 mm in each step. In at least one process step 190a, the wire 12a is bent to form a network element 10a at a bending speed below 360 degrees / s. In at least one process step 192a, at least one wire network 44a is woven from the helixes 58a and / or the closed network elements 10a.

[0055] In the Figures 16 and 17 Two further embodiments of the invention are shown. Figures 18 to 21Four further non-inventive embodiments are shown. The following descriptions and drawings are essentially limited to the differences between the embodiments according to the invention and the non-inventive embodiments, whereby with regard to identically designated components, in particular with regard to components with the same reference numerals, reference is also generally made to the drawings and / or the description of the other embodiments according to the invention and the non-inventive embodiments, in particular the Figures 1 to 15 , can be referred to. To distinguish between embodiments according to the invention and those not according to the invention, the letter a is added to the reference numeral of the embodiment in the Figures 1 to 15 recreated. In the embodiments according to the invention of the Figures 16 and 17 The letter a is replaced by the letters b and c. In the non-inventive embodiments of the Figures 18 to 21The letter a is replaced by the letters d to g.

[0056] Fig. 16Figure 1 shows a cross-section 22b of wire 12b formed perpendicular to a direction of extension 72b of wire 12b of a wire mesh device. The wire 12b has a wire core 76b. The wire 12b has corrosion protection 14b. The wire 12b has a coating 30b. The corrosion protection 14b is designed as a coating 30b. The coating 30b is designed as a corrosion protection layer 16b. Apart from the coating 30b, the wire 12b is made of a high-strength steel 74b. The wire core 76b is made of a high-strength steel 74b. The corrosion protection layer 16b completely encloses the wire core 76b in the circumferential direction. The corrosion protection layer 16b has a constant layer thickness 84b. The corrosion protection layer 16b is designed as a zinc-aluminum coating 28b. The zinc-aluminium coating 28b has an aluminum content of approximately 5%.The corrosion protection layer 16b is bonded to the wire core 76b.

[0057] Fig. 17Figure 1 shows a cross-section 22c of wire 12c formed perpendicular to a direction of extension 72c of wire 12c of a wire mesh device. The wire 12c has a wire core 76c. The wire 12c has corrosion protection 14c. The wire 12c has a coating 30c. The corrosion protection 14c is designed as a coating 30c. The coating 30c is designed as a corrosion protection layer 16c. Apart from the coating 30c, the wire 12c is made of high-strength steel 74c. The wire core 76c is made of high-strength steel 74c. The corrosion protection layer 16c completely encloses the wire core 76c in the circumferential direction. The corrosion protection layer 16c has a constant layer thickness 84c. The corrosion protection layer 16c is designed as a zinc-aluminum coating 28c. The zinc-aluminium coating 28c has an aluminum content of approximately 5%.The zinc-aluminum coating 28c contains at least one additive other than aluminum and / or zinc. The additive is in the form of magnesium. The additive comprises at least 0.5% of the corrosion protection layer 16c. The corrosion protection layer 16c is metallurgically bonded to the wire core 76c.

[0058] Fig. 18Figure 1 shows a cross-section 22d of the wire 12d, formed perpendicular to a direction of extension 72d of a wire 12d of a wire mesh device not according to the invention. The wire 12d has a wire core 76d. The wire 12d has a corrosion protection 14d. The corrosion protection 14d is formed integrally with the wire 12d. The wire 12d is made of a high-strength steel 74d. The corrosion protection 14d is made of a high-strength steel 74d. The wire 12d is made of a stainless steel 218d and / or a corrosion-resistant steel 220d. The corrosion protection 14d is made of a stainless steel 218d and / or a corrosion-resistant steel 220d. The wire core 76d is made of a high-strength steel 74d.

[0059] Fig. 19Figure 1 shows a cross-section 22e of the wire 12e, formed perpendicular to a direction of extension 72e of a wire 12e of a wire mesh device not according to the invention. The wire 12e has a wire core 76e. The wire 12e has a corrosion protection 14e. The wire 12e has a coating 30e. The corrosion protection 14e is designed as a coating 30e. The coating 30e is designed as a corrosion protection layer 16e. Apart from the coating 30e, the wire 12e is made of a high-strength steel 74e. The wire core 76e is made of a high-strength steel 74e. The corrosion protection layer 16e completely surrounds the wire core 76e in the circumferential direction. The corrosion protection layer 16e has a constant layer thickness 84e. The corrosion protection layer 16e is largely composed of a carbon compound that is at least partially organic and / or at least partially inorganic.The corrosion protection layer 16e is at least partially formed as a plastic coating 222e. The corrosion protection layer 16e is at least partially formed as a graphene coating 224e. The corrosion protection layer 16e is metallurgically bonded to the wire core 76e.

[0060] Fig. 20Figure 1 shows a cross-section 22f of the wire 12f, formed perpendicular to a direction of extension 72f of a wire 12f of a wire mesh device not according to the invention. The wire 12f has a wire core 76f. The wire 12f has a corrosion protection 14f. The wire 12f has a plurality of coatings 30f, 226f. The wire 12f comprises two coatings 30f, 226f, wherein one coating 30f is designed as an inner coating 228f and another coating 226f as an outer coating 230f. The inner coating 228f and the outer coating 230f are formed from coating materials that are at least substantially different from each other. The outer coating 230f completely encloses the inner coating 228f, at least in the circumferential direction. The corrosion protection 14f is designed as a plurality of coatings 30f, 226f. The coatings 30f, 226f are designed as two corrosion protection layers 16f.The wire 12f, apart from the coatings 30f and 226f, is made of high-strength steel 74f. The wire core 76f is also made of high-strength steel 74f. The corrosion protection layers 16f completely enclose the wire core 76f circumferentially. The corrosion protection layers 16f have constant thicknesses 84f and 232f. The corrosion protection layers 16f may have different and / or identical thicknesses 84f and 232f. The inner coating 228f is metallurgically bonded to the wire core 76e. The outer coating 230f is metallurgically bonded to the inner coating 228f.

[0061] Fig. 21Figure 44g shows a wire mesh 44g not according to the invention. The wire mesh 44g is designed as a safety net for protection against rockfall. The wire mesh 44g has a wire mesh device. The wire mesh device has a plurality of interlocking mesh elements 10g exceeding two. The mesh elements 10g are made of high-strength steel 74g. The mesh elements 10g are formed in a ring-shaped, self-contained configuration. The wire mesh 44g is designed as a ring mesh 212g. The mesh elements 10g are designed as ring elements 234g of the ring mesh 212g.

Claims

1. Method for a production of a wire net (44a-c; 44e), in which the wire net (44a-c; 44e) is produced from wire netting devices with at least two mutually engaging net elements (10a-c; 10e), wherein the net elements (10a-c; 10e) are produced from at least one single wire, a wire bundle, a wire strand, a wire rope and / or another longitudinal element with at least one wire (12a-c; 12e) that, apart from a coating, is made completely of a high-tensile steel (74a-c; 74e) having a tensile strength of at least 800 N mm-2 , wherein the wire (12a-c; 12e) comprises at least one corrosion protection layer (16a-c; 16e), wherein the net element (10a-c; 10e) has a shape of a flat-pressed helix with a sequence of alternating legs (62a-c, 64a-c; 62e, 64e) and bending regions (66a-c; 66e), wherein the bending regions (66a-c; 66e) each connect two legs (62a-c, 64a-c; 62e, 64e) and the legs (62a-c, 64a-c; 62e, 64e) span a bending angle (70a-c; 70e) in the bending region (66a-c; 66e), wherein in at least one method step (186a-c; 186e) the wire (12a-c; 12e) that is made of the high-tensile steel (74a-c; 74e) is bent to form the helices (58a-c; 58e), wherein the bending region (66a-c; 66f) is a region of the wire (12a-c; 12f) in which a wire orientation changes by at least 60° within a length of the wire (12a-c; 12f) that is smaller than five wire diameters, and wherein in at least one method step (192a-c; 192e) the wire net (44a-c; 44e) is braided from the helices (58a-c; 58e), characterized in that the corrosion protection layer (16a-c; 16e) fulfils the requirements, given in the standard DIN EN 10264-2:2012-03 for a minimum quantity of a coating with a corrosion protection layer (16a-c; 16e) for Class A wires (12a-c; 12e), in that a suitability of a wire (12a-c; 12e) for manufacturing a wire net (44a-c; 44e) is determined prior to production of the finished wire net (44a-c; 44e) by identifying, in at least one method step (178a-c; 178e), a suitable wire (12a-c; 12e) for the wire net (44a-c; 44e) with a high corrosion resistance by means of an alternating climate test on a portion of a wire mesh (18a-c; 18e), which is implemented of the wire (12a-c; 12e) with the corrosion protection layer (16a-c; 16e) and with at least two bending regions (66a-c; 66e) and at least two mutually braided net elements (10a-c; 10e), in such a way that the portion of the wire mesh (18a-c; 18e) in the alternating climate test has a corrosion resistance of more than 1,680 hours, preferably more than 2,016 hours, advantageously more than 2,520 hours, preferentially more than 3,024 hours and particularly preferably more than 3,528 hours, wherein the alternating climate test is a corrosion resistance test of the corrosion protection layer (16a-c; 16e) following the specifications of VDA (German Association of the Automotive Industry) given in their recommendation VDA 233-102, and wherein a wire (12a-c; 12e) that has shown a sufficient corrosion resistance in this alternating climate test is chosen for the manufacturing process, and characterized in that the wire (12a-c; 12e) for forming the net element (10a-c; 10e) is bent with a bending radius (46a-c; 46e) that is in each work step greater than 5 mm, and / or in that the wire (12a-c; 12e) for forming the net element (10a-c; 10e) is bent with a bending speed that is less than 360 degrees / sec, and in that, during a coating of the wire (12a-c; 12e) with a corrosion protection layer (16a-c; 16e), a coating temperature remains in each work step below 440°C.

2. Method according to claim 1, characterized in that a heat acting on the wire (12a-c; 12e) during the coating of the wire (12a-c; 12e) is used for augmenting a strength, in particular augmenting a tensile strength, of the wire (12a-c; 12e).

3. Wire mesh (18a-c; 18e) obtainable by the method for a production of a wire net (44a-c; 44e) according to claim 1, with a plurality of mutually engaging net elements (10a-c; 10e) that are produced from at least one single wire, a wire bundle, a wire strand, a wire rope and / or another longitudinal element with at least one wire (12a-c; 12e) that, apart from a coating, is made completely of a high-tensile steel (74a-c; 74e) having a tensile strength of at least 800 N mm-2 , wherein the wire (12a-c; 12e) comprises at least one corrosion protection layer (16a-c; 16e), wherein the net element (10a-c; 10e) has a shape of a flat-pressed helix with a sequence of alternating legs (62a-c, 64a-c; 62e, 64e) and bending regions (66a-c; 66e), wherein the bending regions (66a-c; 66e) each connect two legs (62a-c, 64a-c; 62e, 64e) and the legs (62a-c, 64a-c; 62e, 64e) span a bending angle (70a-c; 70e) in the bending region (66a-c; 66e), wherein the bending region (66a-c; 66f) is a region of the wire (12a-c; 12f) in which a wire orientation changes by at least 60° within a length of the wire (12a-c; 12f) that is smaller than five wire diameters, wherein at least a portion of a wire mesh (18a-c; 18e) which is implemented of the wire (12a-c; 12e), with the corrosion protection layer (16a-c; 16e) and with at least two bending regions (66a-c; 66e) and at least two mutually braided net elements (10a-c; 10e), in an alternating climate test has a corrosion resistance of more than 1,680 hours, preferably more than 2,016 hours, advantageously more than 2,520 hours, preferentially more than 3,024 hours and particularly preferably more than 3,528 hours, wherein the alternating climate test is a corrosion resistance test of the corrosion protection layer (16a-c; 16e) following the specifications of VDA (German Association of the Automotive Industry) given in their recommendation VDA 233-102, wherein the corrosion protection layer (16a-c; 16e) fulfils the requirements given for Class A wires (12a-c; 12e) in the standard DIN EN 10264-2:2012-03 for a minimum quantity of a coating with a corrosion protection layer (16a-c; 16e).