Manufacturing system and method for producing a metal strip provided with openings, and metal strip

Abstract

The invention relates to a manufacturing system (30) for producing a metal strip (10) provided with openings, said manufacturing system having at least one roll cutting device (32) for making slots in the metal strip (10), at least one stretching device (34) for expanding the slots (10) made in the metal strip (10) into openings (20, 24) and at least one shaping device (36) and / or at least one heat introduction device (38) for changing at least one material property. The invention also relates to a method for producing a metal strip (10) provided with openings (20, 24) using such a manufacturing system (30), and to a metal strip (10) having openings (20, 24) which is produced by means of such a manufacturing system (30) and / or by means of such a method.

Description

[0001] Manufacturing system and method for producing a metal strip provided with openings and metal strip

[0002] The present invention relates to a manufacturing system for producing a metal strip provided with perforations, comprising at least one rolling cutting device for cutting slits into the metal strip and at least one stretching device for expanding the slits introduced into the metal strip into perforations. Furthermore, the invention relates to a method for producing a metal strip provided with perforations using such a manufacturing system, as well as to a metal strip with perforations produced by means of such a manufacturing system and / or such a method.

[0003] Metal strips of the type mentioned above are used, for example, to reinforce a molded body made of a moldable compound, such as a sealing strip made of an elastomeric material. Furthermore, such metal strips can be used as filters, sieves, or gratings.

[0004] To create the openings, it is known to make slits in the metal strip by rotary cutting in a continuous manufacturing process and to widen these into openings by stretching.

[0005] To achieve a tight tolerance in the mechanical and dimensional properties of the metal strip, a so-called cold-rolled strip is used as the raw material. To produce a cold-rolled strip, a so-called hot-rolled strip is used, which is then cold-rolled in several stages and annealed in between. The number of process steps can be reduced by omitting certain metal properties, such as thickness tolerance, minimum or maximum tensile strength, and / or minimum or maximum elongation.

[0006] The present invention is based on the object of creating a manufacturing system, a method and a metal strip which enable the use of raw material which has a high tolerance in the mechanical and geometric properties and a low vertical range of manufacture.

[0007] To solve the problem, a manufacturing system having the features of claim 1, a method having the features of claim 8 and a metal strip having the features of claim 10 are proposed.

[0008] Advantageous embodiments of the manufacturing system, the method and the metal strip are the subject of the respective dependent claims.

[0009] According to a first aspect of the invention, a manufacturing system for producing a metal strip provided with perforations is proposed. The manufacturing system comprises at least one rolling cutting device for creating slits in the metal strip, at least one stretching device for expanding the slits created in the metal strip into perforations, and at least one forming device and / or at least one heat application device for modifying at least one material property of the metal strip.

[0010] By integrating additional process steps, which are realized by providing at least one forming device and / or at least one heat input device, the effects of reduced tolerances of the raw material or starting material in the rotary cutting process can be eliminated, or the tolerances of the raw material or starting material can be reduced. This makes it possible to use a metal strip with a low level of vertical integration and high geometric and / or mechanical tolerances as the raw material or starting material. The manufacturing system enables the processing of a raw material or starting material with a low level of vertical integration and high tolerances using the roll cutting process in a single process.This eliminates additional transport routes, which are required, for example, when processing a hot strip into a cold strip, thus saving handling and processing energy. As a result, a metal strip produced using the manufacturing system according to the invention exhibits an improved carbon dioxide balance. Furthermore, the manufacturing system allows the material properties of the metal strip to be individually adjusted.

[0011] In an advantageous embodiment, the raw material or starting material is a metal, in particular steel, aluminum, or copper. The starting material or raw material is advantageously a so-called narrow coil, which can have a width between 20 mm and 120 mm, in particular between 25 mm and 62 mm. A narrow coil can be produced by slitting a hot strip.

[0012] Advantageously, the openings are formed from edge openings made in edge sections of a strip-shaped base body of the metal strip and from inner openings made in an inner section of the base body.

[0013] In an advantageous embodiment, the tensile strength, elongation at break, and / or yield strength of the metal strip can be adjusted using the forming device and / or the heat input device. This allows the material properties of the metal strip to be individually adjusted using the forming device and / or the heat input device. For example, the tensile strength of the metal strip can be adjusted using the forming device, or the elongation of the metal strip can be adjusted using the heat input device.

[0014] In an advantageous embodiment, the sequence of the devices can be changed. By changing the sequence of the devices, the tolerance of the raw material can be specifically reduced and thus a customized adjustment of the properties of the metal strip can be achieved. For example, a forming device and a heat input device can be arranged before or after the rolling cutting device and / or the stretching device. Alternatively, a forming device or a heat input device can be arranged before or after the rolling cutting device and / or after the stretching device. Further alternatively, a forming device can be arranged before the rolling cutting device and a heat input device can be arranged after the stretching device.

[0015] In an advantageous embodiment, the number of devices is variable. Thus, the production system can comprise multiple forming devices and / or multiple heat input devices. For example, multiple forming devices can be arranged one behind the other to form the raw material or starting material in several stages and thereby adjust the tensile strength.

[0016] In an advantageous embodiment, the forming device is designed as a rolling device and / or a straightening device. The straightening device can have a plurality of rollers over which the metal strip is deflected and straightened, thereby increasing the elongation of the metal strip. The rolling device is advantageously a cold rolling device. The cold rolling device rolls the metal strip, thereby changing its tensile strength. Alternatively, the rolling device can be designed as a hot rolling device.

[0017] In an advantageous embodiment, the heat input device is designed as an annealing device. The annealing device heats and cools the metal strip to adjust its mechanical properties. In particular, the annealing device can be used to change the elongation of the metal strip.

[0018] In an advantageous embodiment, the stretching device is designed as a rolling stretching device. The rolling stretching device expands the slots made in the metal strip into openings. The opening width of the openings can be varied by adjusting the degree of rolling.

[0019] According to a further aspect of the invention, a method for producing a metal strip provided with perforations using a manufacturing system according to the invention is proposed. In the method, a metal strip is first provided. Slits are cut into the metal strip using a rolling cutting device, and the slitted metal strip is subsequently stretched using a stretching device to widen the slits into perforations. The metal strip is formed using at least one forming device and / or heat-treated using at least one heat-injection device before the slits are cut and / or after stretching.

[0020] By forming and / or heat treating the metal strip, both a roll cutting process and the mechanical properties of the metal strip can be adjusted in a single process.

[0021] This means that a metal strip with a low level of vertical integration and high tolerances can be used as a raw material or starting material.

[0022] In an advantageous embodiment, the metal band is an endless band.

[0023] In an advantageous embodiment, the metal strip is rolled or straightened by means of the forming device and / or annealed by means of the heat input device.

[0024] According to a further aspect of the invention, a metal strip with openings is proposed, which is produced by means of a manufacturing system according to the invention and / or by means of a method according to the invention.

[0025] In an advantageous embodiment, a starting material of the metal strip is a hot-rolled strip.

[0026] Below, a metal strip, a manufacturing system, a method for producing a metal strip with perforations, as well as other features and advantages, are explained in more detail using an exemplary embodiment, which is schematically illustrated in the figures. Herein:

[0027] Fig. 1 is a plan view of a metal strip; and

[0028] Fig. 2 is a schematic representation of a manufacturing system for producing the metal strip shown in Fig. 1. Fig. 1 shows a metal strip 10 which is used, for example, to reinforce a shaped body (not shown), such as a seal, or as a filter, sieve, or grid.

[0029] The metal strip 10 has a strip-shaped base body 12 which is formed from first edge sections 14a and second edge sections 14b and an inner section 16 arranged therebetween.

[0030] Each of the edge sections 14a, 14b has a plurality of slats 18 interrupted by edge openings 20. The edge openings 20 extend inwardly from an edge 22 of the base body 12 transversely to the longitudinal direction L, with two edge openings 20 always opposite each other. The edge openings 20 are wedge-shaped inwardly.

[0031] Internal openings 24 are provided in the inner section 16, which are wedge-shaped on both sides. As can be seen in Fig. 1, an internal opening 24 is arranged alternately between two edge openings 20 in the longitudinal direction L of the metal strip 10, and two opposing internal openings 24 are arranged between each two consecutive pairs of edge openings 20.

[0032] The metal strip 10 shown in Fig. 1, in particular the edge openings 20 and the inner openings 24, are manufactured by means of the manufacturing system 30 shown in Fig. 2.

[0033] The manufacturing system 30 has at least one rolling cutting device 32 for making slits in the metal strip 10, at least one stretching device 34 for expanding the slits made in the metal strip 10 to form the openings 20, 24, at least one forming device 36 for forming the metal strip 10 and at least one heat introduction device 38 for heat treating the metal strip 10.

[0034] The rolling cutting device 32 cuts slits into the metal strip 10. For this purpose, the rolling cutting device 32 can have a rotating cutting wheel that cuts the slits into the metal strip 10. The stretching device 34 stretches the metal strip 10 in the longitudinal direction L. This widens the slits to form the openings 20, 24. The stretching device 34 can be designed as a rolling stretching device.

[0035] The forming device 36 forms the metal strip to change the mechanical and / or geometric properties of the metal strip 10. The forming device 36 can be used to change the tensile strength and / or elongation of the metal strip 10. The forming device 36 can be configured as a rolling device and / or as a straightening device.

[0036] The heat input device 38 serves to heat-treat the metal strip 10 in order to change the mechanical and / or geometric properties of the metal strip 10. The heat input device 38 can be used to change the elongation of the metal strip 10. The heat input device 38 can be designed as an annealing device for annealing the metal strip 10.

[0037] The order of the devices 32, 34, 36, 38 is variable. In the present case, the forming device 36 and the heat input device 38 are arranged upstream of the rolling cutting device. Alternatively, the heat input device 38 can also be arranged downstream of the stretching device 34 or upstream of the forming device 36. Furthermore, the number of devices 32, 34, 36, 38 is variable. For example, several forming devices 36 can be arranged one after the other in the production system 30 in order to form the metal strip in several stages and increase its tensile strength and / or elongation.

[0038] A possible method for producing the metal strip 10 using the manufacturing system 30 is explained below. As can be seen in Fig. 2, a starting material 40 in the form of a coil is first provided. The starting material 40 is a hot-rolled strip in the form of a narrow coil having a width between 20 mm and 120 mm, in particular between 25 mm and 62 mm. The starting material 40 is introduced into the manufacturing system 30 and formed, in particular cold-rolled, in the forming device 36 so that the tensile strength of the metal strip 10 is increased. After the metal strip 10 emerges from the forming device 36, the metal strip 10 is fed to the heat input device 38, where it is annealed to increase the elongation of the metal strip 10. Subsequently, the metal strip 10 is fed to the rolling cutting device 32, in which the metal strip 10 is slit.The metal strip is then fed to the stretching device 34, in which the slots are widened by rolling to form openings 20, 24. After rolling, the metal strip 10 provided with openings 20, 24 is rewound into a coil 42.

[0039] By using at least one forming device 36 and / or at least one heat input device 38, a material with a low vertical range of manufacture and high tolerances can be used as the starting material 40 for the metal strip 10. Using the forming device 36 and / or the heat input device 38, the mechanical and / or geometric properties of the metal strip 10 can be specifically adjusted, thus eliminating the effects of the high tolerances of the starting material 40. This allows a cost-effective hot-rolled strip to be used as the starting material for the roll-cutting process. The forming and heat-treating process steps can reduce the high tolerances of the hot-rolled strip.

[0040] The manufacturing system 30 enables both the mechanical and / or geometric properties of a metal strip 10 and the performance of a roll cutting process in a single process. This allows a cost-effective metal strip 10, such as a hot-rolled strip, to be used as the starting material 40. As a result, transport routes, which are incurred, for example, when processing a hot-rolled strip into a cold-rolled strip, are avoided, thus saving handling and process energy, so that a metal strip 10 produced using the manufacturing system 30 has an improved CO2 balance. Furthermore, the manufacturing system 30 enables the material properties of the metal strip 10 to be individually adjusted. List of Reference Symbols

[0041] 10 metal band

[0042] 12 basic bodies

[0043] 14a first edge section

[0044] 14b second edge section

[0045] 16 Interior section

[0046] 18 Slat 0 Edge opening 2 Edge 4 Inner opening

[0047] 30 manufacturing system

[0048] 32 rotary cutting device

[0049] 34 Stretching device

[0050] 36 Forming device

[0051] 38 Heat input device

[0052] 40 Source material

[0053] 42 Coil

[0054] L longitudinal direction

Claims

Claims 1. A manufacturing system (30) for producing a metal strip (10) provided with openings (20, 24), comprising at least one rolling cutting device (32) for making slots in the metal strip (10), at least one stretching device (34) for expanding the slots made in the metal strip (10) to form openings (20, 24), and at least one forming device (36) and / or at least one heat input device (38) for changing at least one material property of the metal strip (10).

2. Manufacturing system (30) according to claim 1, characterized in that a tensile strength, an elongation at break and / or a yield point of the metal strip (10) can be adjusted by means of the forming device (36) and / or the heat input device (38).

3. Manufacturing system (30) according to claim 1 or 2, characterized in that the sequence of the devices (32, 34, 36, 38) is variable.

4. Manufacturing system (30) according to one of the preceding claims, characterized in that the number of devices (32, 34, 36, 38) is variable.

5. Manufacturing system (30) according to one of the preceding claims, characterized in that the forming device (36) is designed as a rolling device and / or a straightening device.

6. Manufacturing system (30) according to one of the preceding claims, characterized in that the heat input device (38) is designed as an annealing device.

7. Manufacturing system (30) according to one of the preceding claims, characterized in that the stretching device (34) is designed as a roll stretching device.

8. A method for producing a metal strip (10) provided with openings (20, 24) using a manufacturing system (30) according to one of claims 1 to 7, comprising the following steps: a. providing a metal strip (10); b. making slits in the metal strip (10) by means of a rolling cutting device (32); and c. stretching the slitted metal strip (10) by means of a stretching device (34) in order to widen the slits into openings (20, 24); wherein the metal strip (10) is formed by means of at least one forming device (36) and / or heat-treated by means of at least one heat input device (38) before the slits are made and / or after the stretching.

9. The method according to claim 8, characterized in that the metal strip (10) is rolled or straightened by means of the forming device (36) and / or annealed by means of the heat input device (38).

10. Metal strip (10) with openings (20, 24), which is produced by means of a manufacturing system (30) according to one of claims 1 to 7 and / or which is produced by means of a method according to claim 8 or 9.

11. Metal strip (10) according to claim 10, characterized in that a starting material (40) of the metal strip (10) is a hot-rolled strip.

Images