EP1760216A2 - Bande de matériau structurée faite d'une bande de matériau et méthode de fabrication - Google Patents

Bande de matériau structurée faite d'une bande de matériau et méthode de fabrication Download PDF

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Publication number
EP1760216A2
EP1760216A2 EP06018314A EP06018314A EP1760216A2 EP 1760216 A2 EP1760216 A2 EP 1760216A2 EP 06018314 A EP06018314 A EP 06018314A EP 06018314 A EP06018314 A EP 06018314A EP 1760216 A2 EP1760216 A2 EP 1760216A2
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EP
European Patent Office
Prior art keywords
material web
beads
web
curvature
structured
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EP06018314A
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German (de)
English (en)
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EP1760216A3 (fr
Inventor
Schokufeh Dr. Mirtsch
Michael Mirtsch
Eberhard Kurzweg
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Mirtsch Dr GmbH
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Mirtsch Dr GmbH
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Priority claimed from DE102005041516A external-priority patent/DE102005041516B4/de
Application filed by Mirtsch Dr GmbH filed Critical Mirtsch Dr GmbH
Publication of EP1760216A2 publication Critical patent/EP1760216A2/fr
Publication of EP1760216A3 publication Critical patent/EP1760216A3/fr
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/32—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
    • E04C2/326—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material with corrugations, incisions or reliefs in more than one direction of the element

Definitions

  • the invention relates to a structured material web of a web material, in particular sheet material web, and method for manufacturing.
  • the multidimensionally stiffening structures of thin material webs play a very special role, because they give the component a high multidimensional rigidity and further advantageous synergistic properties despite the reduced wall thickness.
  • the known bulge / vault structured material webs have disadvantages if the above-mentioned complex, often contradictory requirements are to be met.
  • the existing disadvantages will be explained in more detail below.
  • the folds of the bulge / vault structured materials have small bending radii, as they occur when a material is folded. There, the material of the structured material web is much more reshaped, and therefore the material is comparatively highly plasticized in the area of the folds. Because the folds are always narrow and therefore occupy only a very small area and yet contribute significantly to the dimensional stability of the structured material, the material in the region of the folds in the load case of the structured component is subjected to relatively high stress. In this way, small visible or even invisible to the naked eye cracks, such as microcracks occur in the folds, in which dirt or bacteria can accumulate.
  • the traps enclosed by the folds occupy by far the largest part of the surface of the material web and are only slightly deformed in the load case, because the depression as a three-dimensional shell is very particularly dimensionally stable.
  • This relationship can be understood in a somewhat simplified way so that the narrow folds are regarded as flexible "hinges” and the trough as very rigid elements. It follows immediately that the folds the Danger of a "predetermined breaking point" with high static load, with fatigue load, with thermal cycling and in the event of a crash.
  • bulge / vault structured material webs behave very torsionally soft and at the same time unstable especially at low Beulfalten. They "flip" easily with small torsional loads back and forth.
  • the wells which are also referred to as bulges, especially in large structural wells, have no uniform and no spherical surface-like curvature.
  • the wells of the known bulge / bulge structures in the adjacent region of their folds have very irregular curvatures, because the geometric transition from the narrow folds of a hexagon to the enclosed well causes unavoidable, disturbing transitions.
  • This is undesirable, particularly in lighting technology, because this means that it is not possible to realize a uniform, namely direction-independent, glare-free light reflection on the reflectors of luminaires.
  • a major disadvantage of the known buckling / bulge structures is that, despite the large plasticizing reserves in the region of their wells, a large structural depth of the bulge / bulge structure can not be achieved for optimum shape rigidity, without risking the material in the area the considerably plasticized fold breaks during the structuring itself or during the subsequent component loading.
  • This is not possible with the help of the known support structures, which has an involute on its supporting flanks (cf. EP 0 888 208 ), because here too structural folds arise that still have disturbing geometric transitions from the narrow folds to the trapped hollows. Until now, it has not been possible to state concretely how such an involute should be optimally geometrically designed.
  • the wrinkles occupy only a very small area of the beulFig mandating material web in comparison to the trough, the wrinkles are strained in disproportionate straightening and thereby highly plasticized. Because of the elongation of the troughs, the folds are stretched transversely to the direction of travel of the material web at the same time and thereby drawn slightly flatter.
  • the pleats are compressed in the direction of the material web, whereby the pleat height is increased, while the pleats are stretched transversely to the material web, so that the pleat height is reduced.
  • the pleat height in the direction of the material web is approximately twice as great as the pleat height transversely to the direction of travel of the material web. This results in a strong unwanted anisotropy in the bending, shear and torsional stiffness of the directed structured material web.
  • the known bulge / vault structured material webs can not or only very difficult bend or edge, when the bending radius is considerably smaller than the radius of the support roller used for producing the bulge / bulge structures.
  • the known method for the secondary deformation bulge / wölb Modellierter material webs quickly reaches its limits when the folds and troughs have to be bent much closer together in order to achieve a small radius of curvature of the material web.
  • the troughs and possibly also the folds buckle during tight bending, because they are unstable by high voltage spikes in the material.
  • the disadvantage here is that then for the entire material web to select considerably smaller structure sizes and depths to the kicking to avoid bending, which in turn give the flat or slightly curved wall sections of the workpiece only a low stiffness.
  • the object of the invention is to provide an improved structured material web and a method for producing in which the disadvantages of the prior art are overcome, in particular the disadvantages due to the fold structure. Furthermore, a material-friendly straightening of the structured material web should be made possible. Furthermore, the improved structured material web should allow tight bending.
  • a structured material web of a web material, in particular sheet material web, having a wavy and three-dimensional structure is formed, which is formed with beads and of the beads enclosed domes, wherein the beads are made continuous and have a curvature, the opposite to the curvature of the calotte is.
  • a method for producing a structured material web in particular a structured sheet material web, in which a material web of a web material is provided by means of beads and beads enclosed by the beads with a wavy and three-dimensional structuring, wherein the beads be formed contiguous and with a curvature which is opposite to the curvature of the calotte.
  • the beads in the structured material web are comparatively less plasticized, substantially free of cracks and can absorb significantly greater loads and deformations than the known narrow Beulfalten.
  • the beads behave much less sensitive and more stable against thermal expansion obstacles in thermal cycling and vibration loads.
  • the beads differ from the known beul- / wölb réelle striving wrinkles in terms of their radius' in relation to the thickness of the web. These relationships are influenced in particular by the nature of the material used for the material web, the shape of the supporting elements used in the production in the structuring process and the thickness and the Shore hardness of elastic interlayer for three-dimensional wavy structuring. These relationships arise from the manufacturing process, which is explained in more detail below. The following two statements quantify these relations by way of example. In a first case, a sheet of aluminum sheet of thickness 0.3mm is provided with a crest-like structure, ie hexagonal structures with slightly curved beads / calottes, the key width 33mm.
  • the ratio of bending / radius of curvature of the bead to the material thickness (of the three-dimensional wave-structured material web) is about 13.
  • the ratio of bending / bending radius of the known in the prior art fold to the material thickness (buckling / vault structure), however, is about 5.
  • the ratio of the bending radius of the bead to the material thickness is about 16.
  • the ratio of the bending radius of the known fold to the material thickness is 7.
  • an elastic intermediate layer of thickness 4 mm and Shore hardness was used to produce the bead 60 used.
  • the ratio of the value for the bending / bending radius in the region of the calottes to the value of the material thickness is therefore preferably at least about 8, preferably at least about 10 and more preferably at least about 15.
  • a preferred embodiment of the invention provides that the calottes in a central Kalotten Scheme have a shape which is at least approximated to a spherical shell shape.
  • the beads are formed contiguously according to one or more basic geometrical shapes of the following group of geometric shapes: triangle, square, in particular square, rectangle, rhombus or parallelogram, pentagon, hexagon and Octagon.
  • the beads are formed according to a uniform geometric basic shape.
  • the beads and / or the calotte are each formed with a substantially uniform bead / dome height.
  • the heights are very different.
  • the pleats in the production direction are almost twice as high as the folds across the production direction, because when judging in the planar shape, the first wrinkles are compressed and thus increased, and the second wrinkles are stretched and thereby flattened. This results in an undesirable anisotropic bending stiffness of the structured material webs, which is now prevented in the invention.
  • the web material is selected from a material from the following group of materials: metal such as aluminum, steel, stainless steel, magnesium, titanium, platinum alloys, plastic, fibrous materials, in particular paper and cardboard, fiber fabrics and mesh fabrics , Sheet metal materials are preferably used.
  • metal such as aluminum, steel, stainless steel, magnesium, titanium, platinum alloys, plastic, fibrous materials, in particular paper and cardboard, fiber fabrics and mesh fabrics .
  • Sheet metal materials are preferably used.
  • the web material is formed in a sandwich construction, in which at least one intermediate web is arranged between two outer webs.
  • a preferred embodiment of the invention provides that for at least a portion of the calotte a Kalottenober configuration is broadly diffuse reflective, wherein at least the part of the calotte is formed with the broadly diffusely reflecting Kalottenober configuration as deep calotte.
  • a Kalottenober Structure is directionally reflective for at least a portion of the calotte, wherein at least the part of the calotte is formed with the directionally reflective Kalottenober measurements as a flat dome.
  • the structured material webs on uniform, large and deep and approximately spherical domes, at the convex side of the light almost uniformly, d. H. essentially independent of the angle of incidence, and at the same time broadly diffused.
  • the principle desired by the lighting industry of the so-called light point decomposition can be realized for glare-free or at least very low-glare light reflection even for the broad light scattering of large luminaires and indirect ceiling spotlights. Even with a reflection of the light on the concave side an improvement over the known bulge / vault structured material web is achieved.
  • the sheet material is anodized aluminum sheet.
  • the undulating and three-dimensional structuring is formed as a self-organizing structuring.
  • a further advantageous embodiment of the invention may provide a curved portion, which is optionally designed as a bent portion and in which a curvature is formed with a narrow radius of curvature, wherein the beads and dome in the region of curvature are executed kink free.
  • the bent version is made by bending.
  • it is preferably provided that the curvature is formed in the direction of a curvature on an outwardly directed side of the calotte. While the known folds and their trapped hollows of buckling / buckling structures behave rigidly and buckle in bending or entanglement, surprisingly behave the beads quite different due to their gentle curves and their enclosed calottes.
  • the beads When tightly bending the three-dimensionally wave-shaped structured material web, the beads can distribute bending, pushing and torsion-like quasi the high local bending loads on adjacent areas, by themselves, d. H. "entangle" without mechanical molds and thus “dodge” the danger of high voltages and instability.
  • the zigzag beads of the material web are steplessly adjusted in their running direction in a hexagonal structure, so that they gradually align more and more in the direction transverse to the running direction of the material web, so to speak, "interlace" and thereby have a curved shape accept.
  • the beads are shortened transversely to the direction of the web until they disappear completely.
  • the material web from the zig-zag shape of the beads in the running direction of the material web finally becomes a serpentine bead which runs through transversely to the running direction of the material web.
  • the special feature of the three-dimensional wave-like structure is therefore that it contains these "entanglements", namely Forming without mechanical tools, in the first place.
  • Behind this "entanglement” is a general principle: Although the beads and the calottes represent a resistance to deformation due to their area moment of inertia ("third dimension"). However, they can avoid the high stresses and instabilities during forming, for example bending if the beads were already aligned somewhat obliquely to the direction of the material web before bending and then the beads during bending more and more oblique, ie transverse to the direction of the web, set.
  • the structured material deforms by this type of entanglement by itself so that it avoids an external load without buckling.
  • the geometric and material-technical non-linear laws play a crucial role. Similar phenomena can also be found in the living and inanimate nature.
  • the above-described properties of the three-dimensionally wave-shaped structured material web enable the advantageous use of the material web for articles in different fields of application.
  • These include non-circular tubes, for example, have an oval or elliptical cross-section, or curved channels, which consist of curved and flat circumferential wall sections that can be equipped with larger and deeper structures than when using the known buckling / Völb Modellen the case is.
  • the maximum structure size and thus the rigidity is limited in the known buckling / arch structures downwards by the small radius of curvature of the oval or the ellipse.
  • Oval or elliptical components with high overall stiffness are preferably used in the two following applications, with additional synergistic properties occur.
  • glass production is to be mentioned here by way of example, for example as thin-walled oval or elliptical outgassing tubes made of platinum alloys, so-called "refining chambers".
  • refining chambers Components for the molten glass, in particular for refining chambers, are subject to complex requirements. These include the compensation of thermal expansion disability, a uniform temperature distribution and the most uniform residence time of the molten glass in the components and the fastest possible escape of the gases from the molten glass. These requirements are explained in more detail below.
  • the multi-dimensional, wave-shaped structured walls allow thermal expansion compensation to be compensated in both the axial and the radial (circumferential) direction.
  • the three-dimensionally wave-shaped structured tube walls are superior to the known bulge / vault-structured tube walls, because they have opposite the narrow folds (in the bulge / bulge structures) beads, which are wide and gently rounded and occurring in the thermal expansion disability local stress peaks better and more uniform distribute adjacent areas of the pipe wall.
  • the tube walls of the three-dimensional wave-shaped structured material webs are the known pipe walls (see. DE 100 51 946 A1 ) in terms of a uniform temperature distribution in the electrical heating of the pipe walls and a homogeneous residence time of the molten glass in the tubes and channels superior, because in the known pipes, the flow is alternately constricted and then widened again. This results in the low flow velocities of the molten glass, ie very small Reynolds numbers in the laminar range, to comparatively large "dead water areas". This is not the case with the three-dimensional wave-shaped structured pipe walls because their structures are arranged exactly offset in the flow direction and therefore the average hydraulic flow cross section of the pipe is constant everywhere.
  • the accelerated degassing can also be realized and in addition the aforementioned disadvantages of the known pipe walls such as high local stresses caused by thermal expansion obstructions and occurring dead water areas can be avoided.
  • the three-dimensional wavy structured walls of the expensive platinum alloys also have the significant economic advantage that, for example, with the same (usable) length of the refining chamber quite considerably less precious metal (platinum, rhodium or the like) is needed because the known tubes (see. DE 100 51 946 A1 ) when structuring compared to the originally smooth tubes greatly shorten on the order of at least 10%, while the three-dimensional wave-shaped tubes are structuring only very little (order of magnitude 1%) are gathered.
  • oval-shaped or elliptical thin-walled tubes with a three-dimensional wavy structured wall relates to evacuated synchrotron tubes / channels, for example for brain tumor control using heavy ions.
  • the fast heavy ions Prior to their medical use, the fast heavy ions are preferably "parked" in oval or elliptical, thin, for example, stainless steel tubes of a storage ring.
  • the circular guide (storage ring) of the heavy ions are operated near the absolute zero at about 4 K in superconductivity.
  • the thin-walled pipes must withstand the thermal stresses during start-up, in particular a temperature reduction of about 290 ° C, and shutdown of the plant, namely a temperature increase of about 290 ° C, certainly.
  • these complex requirements such as bending into the oval-shaped or elliptical tube shape, the high overall stiffness by comparatively large and deep structures and further low stress compensation (thermal expansion) even at extreme thermal cycling fulfill.
  • an advantageous embodiment of the invention provide that the beads and the dome are formed by the material web curved and then by an external pressurization on its inner side first against an elastic intermediate layer, which is arranged on rigid support elements, and then against the rigid support elements is pressed.
  • an intermediate layer of a material or a combination of materials of the following group of materials is used as the elastic intermediate layer: elastomer, flexible material and fibrous material.
  • the beads form with their gentle transition to the calotte particularly gentle on the material with the help of a quasi-free deformation of the web that between a curved material web and the support elements in addition an elastic intermediate layer is arranged and then this material web from the outside is pressurized.
  • This elastic intermediate layer which is preferably considerably thicker than the material web thickness, preferably about a factor of 4 to 10, and has a Shore hardness of about 50 to 70, fulfills a different purpose than is the case with intermediate layers in the prior art.
  • the material is deformed more uniformly and gently, whereby preferably deeper structures in the material web can be produced without the material breaking during the Shore hardness deformation.
  • the rigid support elements are preferably made of rigid materials. But they can also consist of elastic materials.
  • the elastic intermediate layer leads to the further important advantage that the multi-dimensional wavy structured material web has only a very small curvature in the direction of the material web immediately after structuring and therefore the subsequent straightening effort in the planar shape is low.
  • the reason for this is that the material web is no longer bent so much around the support element core by a preferably thicker elastic intermediate layer and is therefore rather in a slightly curved shape during structuring and therefore the subsequent straightening process is much easier. This also improves the flatness of the material web.
  • Exemplary experimental investigations show the difference between a three-dimensional wave-structured material web and a known bulge / vault structured Material web using the example of a steel sheet (DC 06) of thickness 0.8 mm and a hexagonal structure with the key widths of 50 mm.
  • DC 06 steel sheet
  • the three-dimensional wave-shaped structures which are produced with a 6 mm thick elastomeric interlayer of Shore hardness 60, results in a ratio of 1.2 compared to the ratio of 1.7 in the known between the bead heights in and across the direction of travel of the web bulge / vault structured structures.
  • Another example shows the results for a 0.5 mm thick stainless steel sheet with the hexagonal wrench size 50 mm and when using the same elastomeric intermediate layer (6 mm, Shore hardness 60): The result is between the bead heights in and across the direction of travel of the material web Ratio of about 2.0 compared to the ratio of about 3.0 in the known bulge / vault structured structures.
  • a third example with aluminum sheet (6061 T6) of thickness 0.6 mm and hexagonal wrench size 33 mm and using the same elastomeric intermediate layer (6 mm, Shore hardness 60) gives the following results: It results between the bead heights in and across the direction of the web Ratio of about 1.3 compared to the ratio of about 1.9 in the known bulge or vault structured structures.
  • the method avoids a strong curvature during patterning, even with higher-strength materials, such as high-strength sheet metal and even fiber-reinforced plastics, improved directionality of the three-dimensionally wave-shaped structured materials results.
  • An advantage of an elastomeric intermediate layer is in particular that the elastomer of the intermediate layer during pressing of the material web "flows" not only perpendicular but also parallel to the material web and thereby shear forces between the elastomer and the wall surface of the material web arise. These additional shear forces work together with the "common" broad support element that forms a broad and at the same time evenly curved bead (in contrast to the narrow Beulfalte the buckling / Völb Modell Schlieren) in the material web.
  • the beads also facilitate the straightening of the three-dimensional wave-shaped structured material web in the planar shape. This can be explained by comparing the behavior of the folds of the known bulge / bulge structures with the bulges of the three-dimensional undulating structures. Both structures have in common that they are formed by hexagonal support elements from the curved smooth starting material web out. The hexagonal structures form on a cylinder circumference. In each case, three folds / bulges converge at the corner points of the hexagon to form a star point and, as a result of the cylindrical material web, each result in a small spatial triangular pyramid.
  • this triangle pyramid has a spatial extent (large area moment of inertia), it behaves dimensionally stable and stable to external loads, because the external forces acting on the pyramid are low and low-voltage derived and distributed.
  • the folds / bulges behave more or less like rods and the trapped depression sections almost like small shear fields.
  • a pressure component made of an elastomer or an active medium is used for the external pressurization.
  • an advantageous embodiment of the invention can provide that the rigid support elements are arranged on a core or in a tool, which / has a contour adapted to a desired bead structure of the beads.
  • the additional elastic intermediate layer can be dispensed with.
  • the contour of the rigid support elements is already formed according to the "common" support elements described above.
  • the "common" support element results, as described above, from the originally narrow support element and the self-adjusting contour of the elastomer of the additional intermediate layer in the three-dimensional wave-like structuring.
  • the diameter of the rigid support member roll may be selected to be similar to the radius of curvature of the web formed by the self-leveling elastic structuring process (which is greater than the radius of curvature of the original support roll).
  • a wall thickness of 0.8 mm and a wrench size 50 mm results in a ratio of the diameter of the new support element roller without elastomeric intermediate layer to the diameter of the support element roller with elastomeric intermediate layer of about 1.5.
  • a further expedient embodiment of the method for producing three-dimensionally wave-shaped structured material webs with the aid of an elastic intermediate layer is that a smaller number of support elements is arranged on the uniform support element roll circumference, so that larger structures are formed.
  • the structured material web leaves the structure roller with a curvature corresponding to that of a correspondingly larger structuring roller without the use of the elastic intermediate layer.
  • the advantage here is that the three-dimensional wave-shaped structures can be equipped in this way with deeper troughs. The structures are in this case more pronounced because a smaller number of structures on the same cylinder circumference has a larger angle section of a structure on the circumference of the cylinder result.
  • the undulating and three-dimensional structuring is formed with a low curvature ("coil set") .
  • curvature of the known bulge / vault structured material web is very large, because the structured material web closely adheres to the support element roll during structuring.
  • a further embodiment of the invention provides that the three-dimensionally wave-shaped structured material webs is produced by means of a complete mechanical forming die (instead of a support element roll) into which the contours of an already three-dimensional wave-shaped structured material web are integrated by means of a mechanical production.
  • the web to be structured is pressed with the aid of an active medium, for example an elastic or pneumatic / hydraulic pad or an elastic pressure roller, directly against the mechanical forming die and in this case three-dimensionally wave-shaped.
  • an active medium for example an elastic or pneumatic / hydraulic pad or an elastic pressure roller
  • a material web formed and produced in the manner described above can be used according to one of the illustrated embodiments, optionally after suitable further processing, in various applications by utilizing the described advantageous properties be, in particular as a structured material web for parts in vehicles, for example, a stiffening and impact energy absorbing reinforcing shell for a hood, a tailgate, a side part, a partition, a bottom part.
  • the material is suitably used: steel, aluminum, titanium, magnesium or alloys thereof.
  • the bead behaves much less sensitive to thermal expansion obstacles in thermal cycling and vibration loads.
  • the greater deformability of the bead relative to the known fold of the failure case under external load especially at impact load shifted considerably further to greater loads. Therefore, three-dimensionally stiffened thin walls or foils or sandwiches are particularly well in the field of automotive engineering, such as for walls, roofs and body panels, aerospace for panels, awnings, enclosures, encapsulation, insulation and apparatus walls and in the cryotechnology (at low temperatures) and in thermal engineering (at high temperatures) suitable.
  • the synergistic benefits of three-dimensional wavy structured materials are demonstrated in terms of high stiffness, low weight, and safety at different dynamic loads.
  • the wave-shaped and three-dimensionally structured material web When used as an inner reinforcing shell, which is connected to an outer hood shell to protect the pedestrian during head impact, the wave-shaped and three-dimensionally structured material web has the significant advantage that even very deep structures can be produced, which for a uniform and at the same time impact energy absorbing effect in body-compatible head impact are better suited than the known hood shells (reinforcing shells) with the buckling / bulge structures, which in the documents DE 102 59591 A1 and in DE 10 2004 044 550 A1 are disclosed.
  • These known hood shells still have the disadvantages that the maximum achievable structure depths are still unsatisfactory, and further the fatigue strength is still low in the dynamic load occurring due to the tight fold radii.
  • the structuring with beads and calottes has the advantage that larger structure depths can be applied. Another advantage results from the fact that in comparison to the known tight fold of the bulge / bulge structures, the wider beads considerably less sensitive to local buckling in lateral striking the cans against each other (during their production or later during transport) or when gripping the filled Canned by the consumer behavior.
  • the uniform spherical domes provide the advantage that even with large structures an exact point-like reflection is achieved according to the principle of light point separation.
  • FIG. 1 shows schematically an apparatus for producing a conventional bulge / vault structured material web 9 according to the prior art with a support element core 3 and an elastic pressure roller 4.
  • the disadvantage is that the bulge / vault structured material web 9, which consists of folds 10 (FIG. considerably more plasticized) and troughs 11 (comparatively flatter and more flattened), closely nestles during structuring of the support element core 3 and therefore leaves the structuring system with a very strong curvature. Therefore, the folds 10 and the troughs 11 are additionally deformed during subsequent straightening in the planar shape and thereby significantly plasticized.
  • Fig. 2 shows schematically an apparatus for producing a wavy and three-dimensionally formed structuring of a material web 2, wherein a resilient pressure roller 4 presses a smooth material web 1 against an elastic intermediate layer 5 and the intermediate layer 5 against a support element core 3.
  • a resilient pressure roller 4 presses a smooth material web 1 against an elastic intermediate layer 5 and the intermediate layer 5 against a support element core 3.
  • the zig-zag-shaped beads can be seen in Fig. 2 only as line 7.
  • the material web is uniformly deformed in the region of the beads 6 and comparatively only very little plasticized. Therefore, the contact pressure of the elastic pressure roller 4 can be further increased to produce even deep dome 8 in the structured material web 2 without the material tearing.
  • the calottes 8 are preferably given an approximately spherical dome shape in hexagonal support elements.
  • the three-dimensionally wave-shaped structured material web 2 exits from the structuring plant with a smaller curvature (so-called coil set) than is the case in FIG. 1.
  • the structured material web 2 in FIG. 2 is somewhat prepared.
  • the downstream alignment unit is not explicitly shown.
  • Fig. 3 shows in the upper part of the cross section through a thin-walled round cylinder (dashed circle) and the sinusoidal, elastic shaft 12 (solid line), which adjusts at low external, all-round hydraulic pressure load (before the dynamic breakdown).
  • the lower image shows after the dynamic breakdown with increased external, all-round hydraulic pressure load comparable to the known Beul Quiltieren, "garland-shaped" wave, which consists of the Beulfalten 10 and the bulge 11.
  • the bulge 11 is in the form of an inner cosine half-wave, wherein the wavelength of this cosine half-wave is twice as large as that of the original sine half-wave. Due to the dynamic, not yet damped breakdown in the known buckling / vault structuring, the known Beulfalten 10 form with their very tight bending radii.
  • FIG. 4 shows in the upper picture the cross section of a three-dimensional wave-shaped structured material web 2 in section A - A and in section B - B and in the lower picture the corresponding plan view with the positioning of these two sections.
  • Fig. 5 shows in the upper part schematically an apparatus for producing a three-dimensionally wave-shaped structured material web 2 with wide support elements 13 on the support element core 3 and an elastic pressure roller 4.
  • the width and the rounding of the support elements 13 preferably correspond to the width of the "common" adapted support element from the rigid support member and the pressed-on elastomer, whereby the comparatively wide beads 14 (modeled from the beads 6 in the material web 2 of FIG. 2) were produced.
  • the elastomer of the pressure roller 4 in Fig. 5 without elastic intermediate layer 5 preferably receives a slightly higher Shore hardness than that
  • the elastomer of the pressure roller 4 has a Shore hardness 60 in FIGS. 1 and 2, the elastomer of the pressure roller 4 in FIG. 5 having a Shore hardness 65 to be equipped to 70.
  • the contact pressure of the pressure roller 4 are still significantly increased against the web to be structured, without the material of the web breaks.
  • comparatively deep structures can be produced, for example, for the crash energy absorption of a hood or for sandwich structures with large wall stiffening due to a large moment of inertia at comparatively low weight or for example for a flow channel or a heat exchanger of two or more layered and interconnected structured material webs with a comparatively large flow cross-section, for example for gas-gas heat exchangers, are produced.
  • a structure depth of more than 6mm can be achieved, while realized by the known buckling / Völb Modelltechnikshabilit in Fig. 1 only a structural depth of about 4mm can be. 5, the structured material web 2 is shown in a partially preformed shape (downstream alignment unit is not explicitly shown).
  • FIG. 6 shows the cross section through a three-dimensionally wave-shaped structured material web 2 with deep, approximately spherical domes 8 for a broad, diffused light scattering.
  • the three images show the reflection of the light in a uniform and broadly diffuse light scattering, which results from the fact that the incident light rays are reflected point-like and at the same time broadly diffuse at the uniformly curved and at the same time deep domes 8. This results in a glare-free or at least a very low-glare reflected light. If a less widely scattered light reflection is desired, flatter domes 8 are produced in that preferably the material web 1 is subjected to a lower pressure by the pressure roller 4 during structuring.
  • the upper image and the middle image show that due to the approximately spherical cap shape even with different angle of incidence of the light, a point-like, diffuse light reflection is achieved.
  • the lower picture shows an example of a directed, diffused light scattering.
  • Fig. 7 shows schematically in the upper picture the cross section through a hood for pedestrian protection with an inner, slightly curved reinforcing shell of a three-dimensional wavy structured material web 2.
  • This structured material web is at their beads 6, 7 with the outer smooth bonnet shell 15 preferably by linear Splices 16 connected.
  • the three-dimensionally wave-shaped structured material web 2 can be adapted to the contour of the only slightly curved, outer hood shell 15 with the aid of simple embossing or calibration tools, which consist of rigid or elastic materials, because the three-dimensionally wave-shaped structured material web 2, in particular even in deep structures large multi-dimensional bending and yield reserves, without the Structures (dome and ridges) are leveled again or locally buckling.
  • This structured material web 2 even allow complex, geometric adjustments to individually designed outer hood shells.
  • FIG. 8 shows the cross section through a hood for pedestrian protection with an inner reinforcing shell made of a three-dimensionally wave-shaped material web 2.
  • the structured reinforcing shell is preferably connected by splices 17 to the dome 8 of the structured material web 2 with the outer, smooth hood shell 15.
  • FIG. 9 shows the cross section through a thin-walled pipe section 18 made of a material web 2 structured in a three-dimensionally wave-shaped manner.
  • This simplified illustration shows only the visible edge of the cut thin-walled pipe section 18 with the beads 6 and the domes 8. On the representation of the structures in the center of the thin-walled pipe section 18 was omitted.
  • the beads 6 and 7 which are considerably wider than the known folds, are less susceptible to lateral and punctiform impacts. The same applies to plastic bottles, in particular for PET bottles.
  • FIG. 10 shows in the upper picture the cross section through a structured, thin and at the same time dimensionally stable wall of a three-dimensional wave-structured material web 2.
  • the lower picture shows the cross section through a sandwich of an upper and lower belt made of a three-dimensional wave-structured material web 2 and a inner plastic or plastic foam core 20.
  • FIG. 11 and 12 show a schematic representation for explaining a method for producing an oval-shaped pipe section 25 (see FIG. 12) from a circular pipe section 22 (see FIG. 11) using a three-dimensionally wave-shaped structured material web.
  • Fig. 11 shows the state before deformation
  • Fig. 12 shows the state after deformation
  • 11 shows a cross section through a circular three-dimensional wave-shaped structured tube 22 with circumferential beads along the line 7 and axial beads 6 and calottes 8 and two rigid or elastomeric pressure rollers 24.
  • the lower image in FIG. 11 shows the plan view on the unwound material web 23 (viewing direction from the projection of the pipe section 22) in the projection of the pipe section 22.
  • Fig. 12 shows in the upper picture the oval shaped tube section 25 which has been converted by the pressing of the pressure rollers 24 and optionally the additional rigid or elastic pressure rollers 27 in the desired oval shape.
  • the pressure rollers 24 and 27 and elastic or rigid molded cushion or pressure elements can be used.
  • Experimental studies have shown that it is not necessary to form the three-dimensionally wave-shaped pressure rollers 24 and 27, mold pads or printing elements with a negative mold equip structured material web. In the simplest case, even simple finger or hand movements are sufficient to complete the transformation into the oval shape.
  • Another method design provides that when tight bending with a small bending radius of the circular three-dimensional wavy structured material web 22 in the oval-shaped of the tube section 25, the beads 6 and 7 independently "deform" claim stressful and thereby of the hexagonal arrangement of the beads 6 and 7 with increasing curvature (corresponding to decreasing radius of curvature) of the oval continuously (ie without kinks in the troughs and ridges) merges into a common, approximately serpentine bead transverse to the direction of the web.
  • FIG. 12 the plan view of the developed lateral surface of the oval-shaped pipe section 25 is shown.
  • the circumferential beads 7 (in the running direction of the material web, arrow direction in FIGS. 11 and 12) rotate / interlace to form beads 29 and 31.
  • the axial beads 6 transversely to the running direction of the material web are shortened continuously to form beads 28 and 30.
  • the beads 32 and 34 at the location of the smallest curvature of the oval assume the shape of a common, approximately serpentine bead.
  • FIG. 13 shows schematically in the upper and middle picture the cross section through a narrowly curved in its running direction, three-dimensionally wave-shaped structured material web 35.
  • two structural capsules 36 are arranged at the location of the curvature of the material web 35.
  • a single structural cap 37 is arranged at the location of the curvature.
  • This staggered arrangement of the structural dome at the location of the curvature results from the geometry of the serpentine beads (not visible in cross-section in FIG. 13) in the transverse direction to the running direction (see top view of the unwound material web in the lower image of FIG. 12).
  • the three-dimensionally wave-shaped structured material web in the bottom left of FIG. 13
  • the shortened zigzag beads 7a and, correspondingly, the elongated ones are formed, as shown in FIG Explode 6a at the place of curvature.
  • Fig. 14 shows schematically, and perspectively only indicated, the cross section through a hood 38 for a vehicle using a three-dimensional wave-shaped reinforcing shell with the beads 6 and 7 and the cap 8.
  • the caps 8 are on their outside, for example by means of adhesive dots 17 with the outer smooth hood shell 15, which is equipped left and right with a curved shape 39, connected.
  • the beads 6 and 7 of the three-dimensionally wave-shaped structured material web can be connected to the outer hood shell 15 (not explicitly shown in FIG. 14) by, for example, splices 16 (analogous to FIG. 7).
  • the three-dimensional wave-structured material web / reinforcing shell can be equipped with tight bending radii, such as in the area 40, and at the same time with deep and large structures.
  • FIG. 15 shows schematic representations in four images for explaining the production of a multi-dimensionally structured material web with support element core.
  • the first image top left shows the bulge / vault-structured material web 9, which tightly conforms to the support element core 3 with the radius R1, on whose circumference 8 structures are arranged, during structuring (analogous to FIG. 1).
  • the second image shows the three-dimensionally wavy structured material web 2 on the support element core 3 with the elastic intermediate layer 5.
  • the third image (top right) shows a three-dimensionally wave-shaped structured material web 2, which closely adheres to the support element core 3 with wider support elements 13 (analogous to FIG. 5) during structuring (without additional elastic intermediate layer 5).
  • the radius R2 of the support element core 3 in the third image (without elastic intermediate layer 5) is equal to the radius R2 of the "naturally" curved material web 2 from the second image (FIG. 15, bottom left).
  • the mechanical forming process in three-dimensional wave-like structuring is modeled.
  • the fourth image (bottom right) shows a three-dimensionally wave-shaped structured material web 2 on a support element core 3 with an elastic intermediate layer 5.
  • On the support element core 3 are six structures (instead of eight structures in the two images in Fig. 15 with the support element cores 3 and Radius R1), wherein the radius R1 is the same in each case.
  • the structures of the three-dimensionally wave-shaped structured material web 2 in the image at the bottom right in FIG. 15 obtain a larger key width and at the same time greater structure depth than in the two other structural devices with the support element core radii R1.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Laminated Bodies (AREA)
EP06018314A 2005-09-01 2006-09-01 Bande de matériau structurée faite d'une bande de matériau et méthode de fabrication Withdrawn EP1760216A3 (fr)

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DE102005041516A DE102005041516B4 (de) 2005-09-01 2005-09-01 Verfahren zum dreidimensional wellenförmigen Strukturieren von Materialbahnen oder dünnwandigen Blechteilen oder Folienabschnitten und Verwendung derselben und Vorrichtung zur Durchführung des Verfahrens
DE102006025222 2006-05-29

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8438883B2 (en) 2007-02-28 2013-05-14 Samsung Electronics Co., Ltd. Washing machine improving washing efficiency
DE102013017644B4 (de) * 2012-10-25 2017-09-21 Dr. Mirtsch Gmbh Verfahren zum Herstellen einer mehrdimensional strukturierten Materialbahn und Verwendung derselben
DE102017107498A1 (de) * 2017-04-07 2018-10-11 Stefano Bächle Einstückiges Kunststoff-Abgasrohr sowie Abgassystem
DE102018004379A1 (de) * 2018-06-01 2019-12-05 Psa Automobiles Sa Einleger für eine Kraftfahrzeugdichtung und Kraftfahrzeugdichtung
CN113987666A (zh) * 2021-12-29 2022-01-28 深圳市毕美科技有限公司 Bim模型审查方法、装置、设备及存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994022612A1 (fr) 1993-04-06 1994-10-13 Frank Mirtsch Bosselage de renforcement
DE4437986A1 (de) 1994-10-24 1996-04-25 Frank Dr Mirtsch Verfahren zur Wölbstrukturierung dünner Wände und Folien
EP0900131B1 (fr) 1996-04-18 2002-10-09 Dr. Mirtsch GmbH Procede de structuration rigidifiant et embellisant la surface des bandes de materiau minces
DE10218144A1 (de) 2002-04-23 2003-11-13 Mirtsch Gmbh Dr Verfahren zur Strukturierung von Flaschen, Dosen und Behältern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994022612A1 (fr) 1993-04-06 1994-10-13 Frank Mirtsch Bosselage de renforcement
DE4437986A1 (de) 1994-10-24 1996-04-25 Frank Dr Mirtsch Verfahren zur Wölbstrukturierung dünner Wände und Folien
EP0900131B1 (fr) 1996-04-18 2002-10-09 Dr. Mirtsch GmbH Procede de structuration rigidifiant et embellisant la surface des bandes de materiau minces
DE10218144A1 (de) 2002-04-23 2003-11-13 Mirtsch Gmbh Dr Verfahren zur Strukturierung von Flaschen, Dosen und Behältern

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8438883B2 (en) 2007-02-28 2013-05-14 Samsung Electronics Co., Ltd. Washing machine improving washing efficiency
DE102013017644B4 (de) * 2012-10-25 2017-09-21 Dr. Mirtsch Gmbh Verfahren zum Herstellen einer mehrdimensional strukturierten Materialbahn und Verwendung derselben
DE102017107498A1 (de) * 2017-04-07 2018-10-11 Stefano Bächle Einstückiges Kunststoff-Abgasrohr sowie Abgassystem
DE102018004379A1 (de) * 2018-06-01 2019-12-05 Psa Automobiles Sa Einleger für eine Kraftfahrzeugdichtung und Kraftfahrzeugdichtung
CN113987666A (zh) * 2021-12-29 2022-01-28 深圳市毕美科技有限公司 Bim模型审查方法、装置、设备及存储介质

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