Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D19/00—Flanging or other edge treatment, e.g. of tubes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B1/00—Layered products having a non-planar shape
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/046—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/02—Physical, chemical or physicochemical properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2266/00—Composition of foam
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2266/00—Composition of foam
  • B32B2266/02—Organic
  • B32B2266/0214—Materials belonging to B32B27/00
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2266/00—Composition of foam
  • B32B2266/02—Organic
  • B32B2266/0214—Materials belonging to B32B27/00
  • B32B2266/0221—Vinyl resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/30—Properties of the layers or laminate having particular thermal properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/30—Properties of the layers or laminate having particular thermal properties
  • B32B2307/304—Insulating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/30—Properties of the layers or laminate having particular thermal properties
  • B32B2307/306—Resistant to heat
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/54—Yield strength; Tensile strength
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/546—Flexural strength; Flexion stiffness
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/718—Weight, e.g. weight per square meter
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/72—Density
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2605/00—Vehicles
  • B32B2605/08—Cars
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24628—Nonplanar uniform thickness material

Definitions

• the invention relates to a method for forming a Bördelfalzes in a multilayer composite material having at least one core layer of a plastic and at least two cover layers of a metallic material. Furthermore, the invention relates to a multilayer, at least one hem flange exhibiting composite material having at least one core layer of a plastic and at least two cover layers of a metallic material.
• Multilayer composite materials are known from the prior art.
• Korean Publication No. 10 2005 0027702 A discloses a roof panel of a vehicle body in which a three-layered envelope material is disposed.
• the composite material has a core layer of a synthetic resin, in particular polypropylene.
• a synthetic resin in particular polypropylene.
• an advantageous balance between the weight and the rigidity or strength of the composite material is created by means of the core layer of a plastic and the two cover layers of a metallic material.
• the stress of the core layer is less than that of the cover layer under typical loads, so that a plastic can be selected for the core layer, which is essentially characterized by its low compared to metal materials density and thus its low weight.
• composite materials of this type have heat-insulating and vibration-damping properties.
• German Auslegeschrift 1 527 957 in turn discloses a three-layered composite material with two outer sheet metal layers and a core layer made of a plastic, for example Polyvmylacetat provided with additives, which is deep-drawn.
• the deep-drawing process should be carried out at a temperature of 120 0 C to 160 0 C.
• the Grenzziehverhaltnis should be able to be increased by this measure.
• the Umformradien generated during deep drawing are compared to the radii of turnovers or bark folds significantly larger, which is why the stress of the material of the individual layers in the forming sheet during deep drawing is significantly lower than when incorporating a brim or cover.
• the plastic core layer unlike that shown in DE 1 527 957, usually has a significantly greater thickness than the cover layers, the cover layers are disproportionately prone to the stress exerted during forming, which is why there is a material failure at the cover layers, for example fractures, cracks or something similar can come.
• the present invention is therefore based on the object, a method for forming a rebate m specify a multi-layer composite material, which ensures high process reliability and optimum integrity of the molded multilayer composite material. Furthermore, the present invention is based on the object of specifying a correspondingly shaped multilayer composite material.
• the object is achieved according to a first teaching of the present invention by a method for forming a brine seam m
• the strength of the plastic core layer can be reduced by the action of heat, in particular at a temperature of 18O 0 C to 300 0 C.
• a hem flange is characterized in that in the region of the arc, the material is formed with a very small radius.
• the outer cover layer covers a larger circumference than the inner cover layer. As a result, the outer cover layer must be stretched, which leads to high tensile stresses, which can lead to failure of the material of the outer cover layer. This effect is all the more critical, the thicker the core layer and the thinner the cover layers are.
• the strength of the core layer is reduced so much that it can be partially displaced during beading by the pressure forces exerted by the crimping tool.
• the committee of multilayer composite material whose top layers has cracks, fractures or the like in the field of Bördelfalzbogens can thus be reduced, which in particular brings an economic advantage.
• the core layer is heated during the forming process to the temperature between 180 0 C and 300 ° C.
• the heat is preferably introduced by heat conduction, induction or radiation in the cover layers and carried on from there via heat conduction into the core layer.
• the heating of the cover layer is not advantageous for the beading and not necessarily desirable. However, since it can not be completely avoided, a temperature range is preferred in which the
• the temperature state of the core layer is measured before and after the forming and during the forming. In this way, a secure process management can be guaranteed.
• the two cover layers can be made of the same metallic material or of different metallic materials. The use of the same metallic material
• the heating to a temperature of 200 0 C to 260 0 C is made. In this way, a balance between the by the
• a high temperature in the range of 300 ° C. ensures a maximum reduction in strength, without the structure of the plastic itself being irreversible or possibly irreparable. Due to the pronounced reduction in strength, the displacement of the plastic material during forming is favored.
• a defined in the present invention moderate increase in the temperature of 180 0 C, however, ensures that - when still sufficiently good ductility of the composite material to Bördelfalzen with small radii - the structure of the plastic and thus the resistance of the plastic during the forming in high Dimensions is preserved.
• the heating operation is terminated before the start of the forming operation.
• the phase of heating and the phase of forming the edging fold into the heated area of the composite material can be separated.
• a secure process flow can thus be ensured particularly advantageous.
• the devices used for heating the composite material can be removed, for example, from the composite material, so that sufficient space is available for the forming tools or crimping tools. Since the forming process generally takes little time, excessive cooling of the heated composite material is not expected.
• the method for forming a Bördelfalzes can be performed very time efficient. Because the warm-up, ie the time that is expended for warming at least the plastic, and the forming process run at least temporarily parallel. For example, the devices for warming and the devices for crimping in a
• the crimping tool can thus also be equipped with a heating element, which transmits its heat energy at least temporarily during the forming of the composite material.
• This variant is intended to illustrate the flexibility of the method according to the invention.
• the metallic material of the cover layers is a steel or a, in particular higher-strength or highest-strength steel alloy.
• the properties of the different materials of the core layer and the cover layers can advantageously complement one another, in particular if a composite material is required which has a certain minimum thickness but whose weight should not exceed a certain maximum limit.
• a steel or a, in particular higher-strength or high-strength steel alloy these requirements are advantageously met.
• cover layers made of a steel or a steel alloy offer high strength or rigidity
• core layer can be made of a plastic to set a certain thickness of the composite material, and still due to the low density of the plastic only a comparatively small contribution to the total weight of the composite material.
• steels or steel alloys
• the cover layers may have identical or divergent thicknesses.
• the composite material can be adapted to acting on the two cover layers, different loads.
• An embodiment with identical thicknesses specifically facilitates the further processing of the composite material, since the composite material no
• Preferred direction is substantially symmetrical.
• the core layer preferably has a thickness which is greater by a factor of 2 to 5 than the thickest covering layer. In this way, a particularly suitable ratio between the weight of the composite material and the strength or rigidity of the composite material is achieved. Also, it is possible to achieve advantageous heat-insulating and vibration-damping properties.
• the core layer of a plastic may have a thickness of 0.75 mm, whereas the cover layers of a metallic material are about 0.25 mm thick. This would correspond to a ratio of about 3 to 1.
• the total thickness of the composite material outside of a corrugated fold produced during the forming operation would thus be about 1.25 mm. This thickness gives the composite material properties, as are preferred in the automotive industry, in particular body construction, for the production of support elements or profile elements.
• the core layer consists of a foamed plastic.
• the plastic (the polymer) is provided with gas inclusions, preferably with air,
• the object is also achieved by a multilayer, at least one edging fold exhibiting composite material with at least one core layer of a plastic and at least two cover layers of a metallic material, wherein the core layer in the region of the arc of the edging against the areas is tapered outside the arc of the hemmed fold.
• the metallic material of the cover layers is a steel or a, in particular higher-strength or highest-strength steel alloy.
• the properties of the different materials of the core layer and the cover layers can advantageously complement one another, in particular if a composite material is required which has a certain minimum thickness but whose weight should not exceed a certain maximum limit.
• cover layers made of a steel or a steel alloy offer high strength or rigidity
• core layer can be made of a plastic to set a certain thickness of the composite material, and still due to the low density of the plastic only a comparatively small contribution to the total weight of the composite material.
• steels or steel alloys offer good corrosion resistance, good forming behavior and are particularly suitable for welding.
• the cover layers may have identical or divergent thicknesses.
• the composite material can be adapted to acting on the two cover layers, different loads.
• a configuration with identical thicknesses facilitates in particular the further processing of the composite material, since the composite material has no preferred direction, but is substantially symmetrical.
• the core layer preferably has a thickness which is greater by a factor of 2 to 5 than the thickest covering layer. In this way, a particularly suitable ratio between the weight of the composite material and the strength or rigidity of the composite material is achieved. Also, it is possible to achieve advantageous heat-insulating and vibration-damping properties.
• the core layer of a plastic may have a thickness of 0.75 mm, whereas the cover layers of a metallic material are about 0.25 mm thick. This would correspond to a ratio of about 3 to 1. The total thickness of the composite outside one during the
• Fig. 2 is a cross-sectional view of a three-ply, a
• FIG. 3 is a cross-sectional view of a three-ply hemmed composite material according to the present invention.
• FIG. 1 is a cross-sectional view of a portion of an exemplary three-layer composite material 2 that may be used to form a hem flange therein.
• the core layer 4 is made of a plastic and has, for example, a thickness of 0.75 mm.
• On both sides of the core layer 4 is in each case a cover layer 6, 8 arranged from a steel. It can also, in particular high-strength or ultra-high strength steel alloys are used as the material of the cover layers 6, 8.
• the cover layers 6, 8 have in this example identical thicknesses of about 0.25 mm, but can also be formed with divergent thicknesses.
• Core layer 4 generally has a thickness which is greater by a factor of 2 to 5 than the thickness of the thickest cover layer 6, 8. It is also possible to provide more than one core layer 4 between the two cover layers 6, 8, if this is expedient for the application. Further core layers 4 would then also preferably be made of a material with a comparatively low density, such as a plastic.
• FIG. 2 now shows the known from Fig. 1, three-ply
• Arc 10 of the edging fold substantially the thickness, as it is present outside of the sheet 10 of the edging fold and thus also, as it existed before the edging fold was formed in the three-layer composite material 2.
• this may lead to failure of the material of the cover layers 6, 8 made of steel in the region of the arc 10 of the Bördelfalzes due to the relatively high load, whereby the risk of cracks or breaks in the cover layers 6, 8 is increased at this point.
• Fig. 3 shows the three-ply composite material 2, as is known from Fig. 1, when a flanged fold has been molded into the composite material 2 by the method according to the present invention.
• the strength of the plastic is reduced.
• the material of the core layer 4 can be partially displaced from the region of the sheet 10 of the edging fold to be formed.
• the outer cover layer 6 covers a smaller circumference than in the example in FIG.
• the core layer 4 is tapered in the region of the arc 10 of the formed edging fold with respect to the regions outside the arc 10 of the edging fold.
• the process reliability of the method as well as the integrity of the multilayer composite material 2 can be increased in this way.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Laminated Bodies (AREA)
• Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
• Shaping Of Tube Ends By Bending Or Straightening (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications (1)

Country Status (6)

Cited By (7)

Families Citing this family (9)

Citations (6)

Family Cites Families (11)

• 2008
  • 2008-05-09 DE DE102008023017A patent/DE102008023017A1/de not_active Ceased
• 2009
  • 2009-04-28 WO PCT/EP2009/055158 patent/WO2009135786A1/de not_active Ceased
  • 2009-04-28 EP EP09742004A patent/EP2271447B1/de not_active Not-in-force
  • 2009-04-28 US US12/990,888 patent/US9873237B2/en not_active Expired - Fee Related
  • 2009-04-28 CN CN200980116625.1A patent/CN102015143B/zh not_active Expired - Fee Related
  • 2009-04-28 JP JP2011507872A patent/JP5636360B2/ja not_active Expired - Fee Related

Patent Citations (6)

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