EP3448612A1

EP3448612A1 - Multilayer component and method for producing same

Info

Publication number: EP3448612A1
Application number: EP16722087.0A
Authority: EP
Inventors: Burkhard Tetzlaff; Peter Klauke; Oliver Kleinschmidt; René VAN DER MARK
Original assignee: ThyssenKrupp Steel Europe AG
Current assignee: ThyssenKrupp Steel Europe AG
Priority date: 2016-04-27
Filing date: 2016-04-27
Publication date: 2019-03-06
Also published as: KR20180137016A; US20190061886A1; JP2019520216A; CN109689265A; WO2017186285A1

Abstract

The invention relates to, inter alia, a component comprising at least one base sheet (2), at least one cover sheet (4) arranged on the base sheet, at least one damping sheet (10) arranged between the base sheet (2) and the cover sheet, and at least one reinforcing element (6, 8). The base sheet (2) is at least partly free of the cover sheet (4) and the damping sheet (10) in an attachment region (12) on the cover sheet side, and the reinforcing element (6, 8) is connected to the base sheet (2) and the cover sheet (4) on the cover sheet side in the attachment region (12). The invention additionally relates to a method for producing a component and to the use of a component.

Description

Multilayer component and method for its production

The invention relates to a component comprising at least one base plate, at least one cover plate arranged on the base plate and at least one damping layer arranged between the base plate and the cover plate. In addition, an advantageous use of such a component is proposed. Furthermore, the invention relates to a method for producing a component.

Generic components are known from the prior art and can be used for example in the maritime industry, especially in shipbuilding.

The background for the use of such materials is in particular due to the very high importance of comfort and work safety for people aboard a ship. Because a significant proportion of comfort and safety have on the people acting

Vibrations in the low-frequency range. Here, the human responds aboard a ship extremely sensitive, in particular to vertical vibrations in the resonance range between 4 and 8 Hz of the spine and the lower jaw. The vibration causes forces along the spine. The largest forces act in the area of the lumbar spine. Such forces over several years with correspondingly high intensity so it can cause changes in the intervertebral discs and the vertebral bodies.

The unpleasant vibrations are caused in the ship with almost 95% by propeller - induced pressure fluctuations and by the

Main Engines excitement. The vibrations caused by the drive area can be primarily determined by a suitably adapted main engine foundation, a coordinated engine geometry as well as a precisely defined - -

Significantly affect firing order. Furthermore, the vibrations caused by the propeller can be reduced by a high number of blades, as this then works in a non-uniform wake. The fewer vanes used, the higher the individual vanes are loaded and the higher the torque and thrust variations introduced into the waveguide must be. It is important that the number of blades is also exactly matched to the number of engine cylinders, so that the excitation of the propeller and engine does not coincide.

In modern shipbuilding, primarily hard materials such as steel or aluminum are used. Due to their poor structure-borne sound absorption

These materials favor the transmission of sound waves. Therefore, despite the aforementioned measures on a large-scale secondary damping and

Entdröhnung of large areas such as ceilings and walls to this day are not waived.

The decking used today in shipbuilding practice can be divided into three basic variants: standard floor, vibration damped floor and floating floor. The selection of the constructive structure of the deck coverings depends on the type of use of the deck areas and their dynamic load situation. Also combinations of the individual variants are possible.

A standard floor covering is usually made of lightweight concrete, which is applied in thicknesses of 0 - 30 mm on steel, aluminum or galvanized deck surfaces with very good adhesion. The concrete layer is used in thicknesses of 0 - 5 mm as Beulausgleich and greater thickness than Druckverteilungs- u. Stabilizing layer with good surface strength at low specific gravity of 1.0 - 1.2 kg / m ² / mm.

Vibration damped floor constructions are typically used in

Areas with high impact sound absorption of the load-bearing deck structure used and where structures of direct dynamic and shock load - - are exposed. The principle of dampened floors consists of a specially designed layer structure using one (or more) distinctly viscoelastic, rubbery interlayer. Thus, the supporting deck structure made of steel or aluminum is effectively damped and the

Vibration amplitudes of both this layer as well as those of the overlying layers and the sound radiation into the environment significantly reduced. Low shear moduli of the viscoelastic layer cause a good decoupling of the adjacent layers, especially in the case of the bending load of surface structures typical of structure-borne noise and impact noise. As cover layers over the

viscoelastic layer, both different types of lightweight concrete and steel plates are used. The thickness of the concrete layer depends on the application and usually varies between 4 and 30 mm. Upper layers of steel plates have thicknesses between 1.5 and 2 mm. The specific weights of executed vibration damped floors are between 10 and 30 kg / m ² . Higher specific gravity floors generally also have higher damping, although the thickness of the 1.5 to 2 mm viscoelastic layer is usually uniform. An influence here is also the well-defined damping of the concrete layer. Finally, floating floor constructions are used in areas with high airborne sound input and high body sound intensity. Floating floors are usually made by using a 30 to 50 mm thick

Mineral wool layer with low modulus of elasticity a very effective

Vibration decoupling achieved between the load-bearing deck structure and the cover plate. In order to increase this effect, the cover plate is made relatively massive (thickness about 30 mm). At the same time, this layer serves as

Pressure distribution layer and requires a sufficiently high strength. In part, the top layer is itself built up of several layers, often from 1.5 to 3 mm thick steel plates including the viscoelastic intermediate layers. The resonance frequencies for the movement of the supporting layer and the upper one

Cover layer are in the range below 100 Hz. Although for under the Resonance frequency lying area for physical reasons, no reduction of the vibration amplitudes can be achieved by decoupling causes the damping power contained in the mineral wool (dissipation effects) a significant attenuation of lying in this frequency range vibration modes of the supporting and upper layer. For the above mentioned lowest

Resonance frequency frequency range is achieved a very strong reduction of sound radiation. The specific weights executed

Floating floors are between 25 and 70 kg / m ² . A disadvantage of the aforementioned floor variants, however, is that all in

Relative to their acoustic effect have a very high specific gravity. In particularly noise critical areas are so additional

Area weights of up to 70 kg / m ² achieved. In order to counter this problem, the prior art DE 10 2014 007 066 B3 proposed components consisting of two cover layers made of a steel material and a non-metallic core layer arranged between the cover layers. The components have structure-borne noise-damping properties and can be used for structures preferably in the maritime industry, such as shipbuilding. It should be a special

Core layer can be used to improve the weldability.

In WO 2015/047081 AI is also a method for the construction of a

Design panels with two metal plates and an interposed acoustic insulation layer described. The metal plates can be connected to each other by means of a welding bolt to prevent delamination.

However, it has been found that the known components in use, that is in the welded state, the durability as well as the

Stiffness requirements can not or can only be achieved with great effort. - -

Against this background, the invention has the object, a component, a

Specify a method for producing a component and a use of a component, wherein the required strength and stiffness properties can be achieved with low weight in a process-reliable manner.

The object is achieved according to a first aspect of the invention by a component, in particular produced by a method according to the invention, comprising

at least one base sheet,

at least one cover plate arranged on the base plate,

at least one arranged between the base plate and the cover plate

Damping layer, and

at least one stiffening element,

wherein the base plate in a connection area is on the cover plate side at least partially free of the cover plate and the damping layer, and wherein the stiffening element is connected on the cover plate side in the connection region with the base plate and the cover plate. The object is achieved according to a second aspect of the invention by a method for producing a component, in particular a component according to the invention, comprising the method:

Providing at least one base sheet,

Providing at least one stiffening element,

- Arranging at least one cover plate on the base plate, wherein a

Damping layer is provided between the base plate and the cover plate,

Connecting the stiffening element on the cover plate side with the base plate and the cover plate in a connection region of the base plate, wherein the connection region is at least partially free of the cover plate and the damping layer. The invention is based inter alia on the finding that the requirements for durability and rigidity can be met in particular in a weight-saving and process-reliable manner when the stiffening element is connected or connected to both the base plate and the cover plate. As a result, the excitation of local structures (for example, starting from global ship vibrations) can be significantly reduced already in the (supporting) structure by the use of components according to the invention or components produced according to the invention. In particular, in shipbuilding was previously with the usual on the shipyards welding safe welding of both the base plate and the cover plate, such as based on a T or Kreuzstoßes, not possible.

By the connection of the stiffening element with the base plate and the cover plate in particular a permanent connection of these components is created. This can preferably be done by a cohesive method, in particular by welding. It is also conceivable gluing and / or soldering as cohesive process.

The base plate and / or the cover plate is for example a steel sheet or an aluminum sheet. For example, the base plate and / or the cover plate in

Essentially flat. For example, the base plate and / or the cover plate has a thickness of 1 to 10 mm, preferably 2 to 5 mm. For example, the thickness of the base plate is substantially 3 mm. In principle, even more sheets can be provided.

The damping layer in particular provides sound-damping properties. For example, the damping layer is a non-metallic damping layer. For example, the damping layer consists of a plastic layer.

For example, the damping layer is formed as a film. For example, the damping layer consists of a silicone-containing material. Basically, however - - Other materials conceivable that have a sufficient damping function. It is also conceivable that further damping layers can be provided. The base plate, the cover plate and the damping layer arranged therebetween in particular form a multilayer or sandwich structure.

Also, the stiffening element may be formed as a sheet, in particular sheet steel or aluminum sheet. For example, the stiffening element is substantially angled, in particular at right angles in the connection region on the base plate and / or cover plate. For example, the connecting element is connected with a T-joint or oblique joint in the connection region.

Preferably, the base plate is on the cover plate side substantially exclusively in the connection region and optionally at least in sections in the edge region free of the cover plate and the damping layer. This means that otherwise the base plate is preferably covered by the cover plate or preferably a plurality of cover plates and the corresponding damping layers substantially flat. On the side facing away from the cover plate, the base plate is preferably free of a damping layer or a cover plate. The part of the connection area of the free from the cover plate and the

Damping layer is, in particular, depending on the thickness of the

Stiffening element can be selected. For example, the width of the region free of the cover plate and the damping layer is between 10 to 20 mm, for example about 16 mm.

Since at least one base plate, at least one cover plate, at least one

Damping layer and at least one stiffening element is provided, the component may also comprise a plurality of base plates, cover plates, damping layers and / or stiffening elements (for example, two, three, four or more). Insofar as under the base plate, the cover plate, the damping layer or the

Stiffening element, the at least one base plate, the at least one - -

Cover plate, the at least one damping layer or the at least one

To understand stiffening element. If several base plates, cover plates,

Damping layers and / or stiffening elements are provided, the previous or following statements apply to at least one base plate, a

Cover plate, a damping layer or a stiffening element, but preferably for all existing base plates, cover plates, damping layers or

Stiffeners.

According to a preferred embodiment of the aspects, the stiffening element is strip-shaped, in particular designed as a Holland profile. For example, the stiffening element is designed substantially as a rectangular profile. A holland profile, also referred to as bead profile, is essentially understood to mean a profile with a unilateral girth, in particular a rounded L-shaped profile, in particular according to DIN EN 10067. For example, other profile shapes may also be used.

According to a preferred embodiment of the first aspect is

Stiffening element cohesively, in particular by welding with the

Base plate and the cover plate connected.

Accordingly, according to a preferred embodiment of the second aspect, the stiffening element is materially bonded, in particular by means of welding to the base plate and the cover plate. For example, the connection takes place by means of pressure and / or heat. For example, the compound is made with or without a welding additive. For example, MIG welding, MAG welding, laser welding

Laser hybrid welding or gas welding used. Further

For example, welding methods may also be used. Likewise gluing or soldering. For example, the cohesive connection is automated or by hand. - -

As already stated, the stiffening element can be connected in particular by means of T-joint in the connection region. Here, preferably fillet welds are used.

Be particularly advantageous in this case the following parameters

Welding process shown. Preferably, the welding is carried out by means of a

Solid wire electrode. It has been shown that a solid wire to very good

Seam appearance and flat seam transitions and low spatters leads. In this case, the supplied material can take over the function of a gap bridging.

For example, a solid wire electrode made of steel is used, for example, the wire has the alloy components 0.1 C, 1.0 Si and 1. 7 Mn in% by weight (for example Böhler EMK8). As another example, the wire has the alloy components 0.08 C, 1.05 Si and 1.65 Mn in wt% (for example, Union K56). For example, a wire diameter of 0.8 - 1.2 mm is used. Preferably, one is welded under an Ar-CCh atmosphere (for example, about 82% Ar and about 18% C0 ₂ ). An advantageous

Wire feed speed is between 5 and 15 m / min, for example at 8 m / min or 13 m / min. For example, other welding consumables, in particular in wire form, can also be used.

According to a preferred embodiment of the first aspect, the

Stiffening on the base plate side facing one side or preferably on both sides of a chamfer. Alternatively, the stiffening element on the side facing the base plate plan, so not chastised.

Accordingly, according to a preferred embodiment of the second

Aspect the method further:

one-sided or preferably two-sided chamfering of the stiffening element on the side facing the base plate of the stiffening element before connecting the stiffening element with the base plate and the cover plate. - -

The side facing the base plate of the stiffening element, for example, with the base plate (for example, in the T-joint) in contact. The side facing the base sheet is, for example, an end face with two edges, one or both of which are chamfered or are. For example, the stiffening element is chamfered at an angle between 20 ° and 50 °, preferably between 30 ° C and 40 ° C, in particular with respect to the surface of the stiffening element.

According to a preferred embodiment of the second aspect, the method further comprises:

fixing the stiffening element on the base plate in places, in particular before arranging the cover plate on the base plate.

By an in particular the actual connection of the stiffening element with base plate and cover plate upstream fixing the stiffening element on the base plate, the process reliability can be further increased and a particularly precise alignment of the individual components to each other can be achieved. For example, the fixing is done by isolated spot welding (MIG, MAG or autogenous). According to a preferred embodiment of the first aspect, the damping layer with the base plate and the cover plate is firmly bonded, in particular glued.

Accordingly, according to a preferred embodiment of the second aspect, the cover plate is materially connected to the base plate via the damping layer.

A cohesive bonding, in particular a bonding allows a flat and stable connection in a simple manner. The bonding of cover plate and or base plate with the damping layer is preferably carried out after (provisionally) fixing the stiffening elements. Preferably, the damping layer is as - - Self-adhesive layer formed. Subsequently, the final joining of the stiffening element with the cover plate and the base plate preferably takes place.

In this regard, it is particularly advantageous if, according to a preferred embodiment of the second aspect, the method further comprises:

Providing at least one cover sheet already provided with a damping layer.

If the cover plate is already provided with the damping layer, the cover plate can be arranged together with the damping layer in one step on the base plate and glued thereto, for example due to a self-adhesive damping layer. The cover plate forms a patch or composite with the damping layer and can be applied in this composite. Individual cover plates, each with an already provided damping layer can thus be arranged in the manner of a patchwork on the base plate and connected thereto. Alternatively, only a cover plate with an already applied damping layer can be applied to a base plate and connected thereto, wherein the dimension of the cover plate can substantially correspond to the dimension of the base plate.

According to a preferred embodiment of the aspects, the damping layer as a film, in particular with a thickness of less than 200 μιη, preferably formed less than 100 μπι. By forming the damping layer as a film, a sound attenuation can be achieved particularly weight-saving. In addition, a damping layer formed as a film can advantageously already be provided on the cover plates, so that these can be applied together with the cover plates. Preferably, the thickness of the film in the range of 20 - 100 μιτι, preferably 40 - 60 μιη, for example, at about 50 μιη. According to a preferred embodiment of the aspects, the component has a plurality of base plates, a plurality of cover plates and / or a plurality of stiffening elements. - -

For example, at least two base plates, cover plates and / or

Provided stiffening elements. In particular, a plurality of cover plates and / or stiffening elements can be connected to a base plate. As already stated, the cover plates (in particular including the damping layer already connected thereto) can be arranged in a patchwork manner on the base plate. In particular, the stiffening elements can surround a region on the base plate, in which then a cover plate is arranged with the damping layer.

In this case, a stiffening element may also preferably span a plurality of (for example two) base plates, which increases the rigidity and strength in the case of several

increases provided base plates.

According to a preferred embodiment of the first aspect, the component comprises at least two base plates, each with at least one cover plate arranged thereon, wherein adjacent base plates with the arranged thereon

Cover plates are connected to each other in the butt joint.

Accordingly, according to a preferred embodiment of the second aspect, a plurality of base plates are each provided with at least one cover plate arranged thereon, wherein the method further comprises:

Connecting adjacent base plates with the arranged thereon

Cover plates together in the butt joint.

For example, at least two base plates are provided. The base plates can, for example, be bonded cohesively by means of welding, in particular with an I-seam or V-seam in the butt joint. The fact that the adjacent base plates are or are connected to each other and also the adjacent cover plates are connected to each other or can be another

Improvement of the strength and rigidity of the component can be achieved. - -

So that the sheets are reliably detected by the connection, it has proven to be advantageous if the damping layer and / or an intended adhesive in the region to be joined is first decomposed. For this purpose, the cover sheet edges to be joined can first be heated to about 900 to 1000 ° C [for example by means of an autogenous flame], so that a thermal decomposition takes place. It has been shown that subsequent welding less

Imperfections. Preferably, a connection takes place by means of a

Wire electrode, for example a metal powder filling wire. For example, the wire has the alloy components 0.03 C, 1.35 Mn and 0.06 Si in% by weight (for example Robofil M71). As another example, the wire has the

Alloy components 0.08 C, 1.05 Si and 1.65 Mn in wt% (for example, Union K56). For example, a wire diameter of 1.2 to 1.6 mm is used. It has been shown that a good seam appearance and flat seam transitions can be achieved.

According to a preferred embodiment of the aspects, the component has at least one longitudinal stiffening element and transverse stiffening element as stiffening elements. For example, the longitudinal stiffening element and the

Transverse reinforcing element substantially transversely, in particular at right angles to each other. Preferably, a plurality of longitudinal stiffening elements and a plurality of transverse stiffening elements are provided.

According to a preferred embodiment of the first aspect, the

Stiffening element on the one hand and the cover plate and the damping layer on the other hand in the connection region a predefined distance from each other.

Accordingly, according to a preferred embodiment of the second aspect, the cover plate, the damping layer and the stiffening element are arranged to each other such that in the connection region between the

Stiffening element on the one hand and the cover plate and the damping layer On the other hand, a predefined distance is maintained. The connection of the

Stiffening element with the base plate and the cover plate, for example, during welding by the introduced welding additive (for example

Electrode solid wire) can be achieved.

It has been found that by maintaining a predetermined distance, the properties of the component can be improved. The stiffening element is thus initially not in contact with the cover plate and the damping layer. The distance may be particularly preferred depending on the thickness of the

Reinforcement element can be determined.

According to a preferred embodiment of the aspects, the component is a structural component of a ship, in particular a component of a ship's hull, a ship's wall, a bulkhead, a ship's ventilation duct and / or a

Ship decks. Especially in this area high demands are placed on the rigidity and durability with high sound attenuation.

location-wise fixing of the cover plate on the base plate, in particular in front of the cover plate side connecting the stiffening element with the

Base plate and the cover plate.

By connecting the stiffening element to the base plate

upstream location-wise fixing of the cover plate, in particular a more precise arrangement of the individual components can be achieved. It has been shown that otherwise a thermal distortion in particular the distance of the cover plate, such as the stiffening element, can influence. Fixing in places may, for example, also be effected in a material-locking manner, in particular by welding, in particular fusion welding. - -

Inserting recesses in the cover plate and the damping layer before joining to the base plate, and

- Joining, in particular welding of the cover plate with the base plate in the region of the introduced recesses.

The recesses are designed, for example, as holes. It has been shown that by introducing recesses in the cover plate and the

Damping layer a direct joining (in particular welding, for example MIG spot welding) of cover plate and base plate (in addition to the

described connection via the damping layer) can be achieved. This reduces the risk that delamination of the base plate and cover plate, for example, due to thermal distortion occurs. The joining is preferably carried out in the already connected via the damping layer (in particular glued) state of the cover plate and base plate.

Accordingly, the component preferably has recesses in the cover plate and the damping layer, wherein the cover plate is joined to the base plate in the region of the recesses with each other. The recesses may be closed, for example by a welding additive.

Components according to the first aspect can be advantageous in particular for

Construction machinery, agricultural machinery, transformers or vehicles are used.

According to a third aspect, the use of a component according to the first aspect in shipbuilding, in particular for a load-bearing ship structure, for a ship's hull, for a ship's wall, for a ship's bulkhead, is particularly advantageous

Ship ventilation duct and / or for a ship's deck, since in this area in particular high demands are placed on the rigidity and durability with simultaneously high sound attenuation. Through the preceding and following description of method steps according to preferred embodiments of the second aspect, components produced accordingly should also be disclosed. Likewise, by the disclosure of

Components according to preferred embodiments of the first aspect corresponding process steps to be disclosed for their preparation.

In addition, the invention will be explained in more detail with reference to embodiments in conjunction with the drawings. The drawing shows in

Fig. La - e schematic representations of an embodiment of a

inventive method for producing a

Embodiment of a component according to the invention in perspective view;

Fig. 2 is a schematic representation of the embodiment of Fig le in a perspective view;

Fig. 3 is an enlarged schematic side view of the embodiment of Fig. Le;

4 is a schematic side view of the connection area in front of the

Welding; and FIGS. 5a, b are enlarged views of welded areas of a

Embodiment of a component according to the invention.

FIGS. 1a-e show first schematic representations of a

Embodiment of a method for production according to the invention

Embodiment of a component 1 according to the invention [cf. Fig. Le) in - - Perspective view. The display order should serve only for the sake of clarity. That is, when carrying out the method, a different sequence of the method steps may preferably be carried out. In Fig. La initially two base plates 2 are shown. The base plates are made for example of steel and have a thickness of about 3 mm. In Fig. Lb is shown as on each base plate 2 a plurality of cover plates 4 can be arranged. The cover plates 4 are provided on their underside with a self-adhesive damping layer 10. In Fig. Lc and Fig.ld is shown how the cover plates 4 are patchwork-like arranged on the base plate 2 and glued thereto. In addition, stiffening elements 6, 8, which as

Longitudinal stiffening elements 6 and transverse stiffening elements 8 are formed are shown. In FIG. 1e, all the stiffening elements, that is to say in this case six longitudinal stiffening elements 6 and two transverse stiffening elements 8, are arranged at their corresponding position which results in the component 1. 2 shows a schematic plan view of the embodiment from FIG. 1, and FIG. 3 shows an enlarged schematic side view of the embodiment from FIG.

However, the production of the component 1 preferably does not proceed in the order shown. This will now be described in particular with reference to the other figures.

3 shows a connection region 12, the base plate 2 in this connection region 12 being at least partially free of the cover plate 4 and the damping layer 10 (see FIG.

4 shows a further enlarged schematic side view of this connection region 12 before welding. The stiffening element 6 can be connected to the cover plate side in the connection region 12 both with the base plate 2 and the cover plate 4. For this purpose, the stiffening elements 6, 8 on its side facing the base plate 2 on both sides at an angle of about - -

Chamfered at 30 ° to 40 °. In Fig. 4, the resulting chamfers 14 are shown. The stiffening elements 6, 8 are arranged on the base plate 2 and fixed with this preferably with welds (provisionally). Subsequently, the surfaces between the longitudinal and

Transverse stiffening elements 6, 8 provided with the self-adhesive cover plates 4. In this case, a predefined distance is maintained between the glued-on patch (comprising a cover sheet 4 and a film damping layer 10, film thickness, for example, about 50 μm) and the circumferential longitudinal and transverse reinforcing elements 6, 8. This distance may vary depending on the thickness of the stiffening element. As can be seen in FIG. 4, in the connection region 12, the

Base sheet 2 in any case sections free of the cover plate 4 and the

Damping layer 10. The free area in this case has a width 16 of about 16 mm.

Subsequently, the cover plate 4 with the damping layer 10 against thermal distortion selectively in a well-defined distance on the base plate. 2

fixed by fusion welding. Then then the

Stiffening elements 6, 8 welded in T-joint both with the base plate 2 and with the cover plate 4 circumferentially with a fillet weld 18.

5a shows an enlarged view of the connection region 14 already shown in FIG. 4 after welding. Evident are the fillet welds 18, which connect the stiffening elements 6, 8 both with the base plate 2 and with the cover plate 4. For the production of fillets 18 was a

Wire electrode, in particular a solid wire electrode used. In one embodiment, a Böhler EMK8 wire electrode with a wire gauge of 1.0 mm and a wire feed speed of 13 m / min was used at about 240A. In an alternative embodiment, a wire electrode of the type Union K56 with a wire thickness of 1.2 mm with a

Wire feed speed of 8 m / min used in pulsed mode. In both cases were welded under an atmosphere of 82% Ar and 18% C0 ₂ . The use of the wires leads to a very good production

Seam appearance, shallow seam transitions and low spatters. In particular, it can be seen that no Einbrandkerben and no delamination occurred.

So that the composite of cover plate 4 and damping layer 10 does not lift off the base plate 2 as a result of thermal distortion, a punctual connection to the base plate 2 by means of MIG spot welding is also provided on the surface of the cover plate 4. For this purpose, the composite of cover plate 4 and

Damping layer 10 before bonding with the base plate 2 with one or more holes (not shown) provided and welded surface mounted in the glued state with the base plate 2.

In the course of the production of large components, for example, for large ship segments, individual sandwich panels or composites of base plate 2, cover plate 4 and damping layer 4 are connected by butt joint. Correspondingly adjacent plates 2, 4 are shown in FIG. 3 on the left side in area 13. For a fault-free detection of the sheets 2, 4, the following procedure has been proven. The edges of the cover plates 4 are heated briefly in the joining region with an autogenous flame to about 900 to 1000 ° C. The local heating leads to a thermal

Decomposition of the adhesive layer, thereby reducing possible imperfections during the subsequent welding process. For welding in this case, the distance of the base plates 2 is about 1 mm, the distance of the cover plates 4 about 3 mm. For the welding of a butt joint, the use of a

Wire electrode, in particular a metal powder filling, proven (for example, the type Robofil M71 or Union K56 type), proven.

For this purpose, Fig. 5b shows an accomplished weld by means of butt joint and I-seam 20. In one embodiment, a wire electrode of the type Union K56 with a

Wire thickness of 1.2 mm and a wire feed speed of 6 m / min used. It was welded under an atmosphere of 82% Ar and 18% C0 ₂ . - -

The above wire leads to a good seam appearance and to flat

Weld toes. The joining methods described can be both by

Manual welding as well as automated. In particular, the use of a laser hybrid method is conceivable.

The welded as described above components were a cyclic

Subjected to load change test. A top load of 20 kN and an underload of 2 kN were used. It has been shown that, for example, at a

Start Wegschwingbreite of 0.227 mm only a path change of 0.051 mm at a Wegschwingbreite of 0.227 mm after 2.0 x 10 ⁵ load changes can be achieved. With a further sample, for example, at a starting path swing width of 0.218 mm, only a path change of 0.013 mm was achieved with a path swing width of 0.221 mm after 2.0 × 10 ⁶ load changes. Thus, the components can the required strength and stiffness properties at low

Weight fulfill.

Alternatively, and not shown here, the base plate or the base plates and the cover plate or the cover plates may have substantially the same dimension, which are connected or glued together via a damping layer, in particular locally if necessary by means of welds additionally fixed. In contrast to the procedure described above (patchwork), a predefined connection area is used to connect to the

Stiffening elements exposed by local removal of a portion of the cover plate and the associated damping layer by thermal and / or machining up to the base plate. The removal can be carried out for example by means of plasma gouging or milling. Afterwards, the

Connection with the stiffening elements in the exposed areas, as already described above, take place.

Claims

P a n t a n s p r e c h e

Component, in particular produced by a method according to one of

Claims 13 to 22, comprising

at least one base plate (2),

at least one cover plate (4) arranged on the base plate, at least one damping layer (10) arranged between the base plate [2] and the cover plate, and

at least one stiffening element (6, 8),

wherein the base plate (2) in a connection region (12) on the cover plate side at least partially free of the cover plate (4) and the

Damping layer (10) is, and

wherein the stiffening element (6, 8) is connected to the base plate (2) and the cover plate (4) on the cover plate side in the connection region (12).

Component according to claim 1, wherein the stiffening element (6, 8) is strip-shaped, in particular designed as a Holland profile.

Component according to claim 1 or 2, wherein the stiffening element (6, 8) is materially connected, in particular by means of welding with the base plate (2) and the cover plate (4).

Component according to one of the preceding claims, wherein the

Stiffening element (6, 8) on the base plate (2) facing side on one side or preferably on both sides of a chamfer (14). Component according to one of the preceding claims, wherein the damping layer (10) with the base plate (2) and the cover plate (4) integrally connected, in particular glued.

Component according to one of the preceding claims, wherein the damping layer (10) as a film, in particular with a thickness of less than 200 μπι,

preferably less than ΙΟΟμηι is formed

Component according to one of the preceding claims, wherein the component (1) comprises a plurality of base plates (2), a plurality of cover plates (4) and / or a plurality

Stiffening elements (6, 8).

Component according to one of the preceding claims, wherein the component (1) at least two base plates (2) each with at least one on it

arranged cover plate (4), wherein adjacent base plates (2) are connected to the cover plates (4) arranged thereon in butt joint with each other.

Component according to one of the preceding claims, wherein the component comprises at least one longitudinal stiffening element and transverse stiffening element as

Has stiffening elements.

Component according to one of the preceding claims, wherein the

Stiffening element (6, 8) on the one hand and the cover plate (4) and the

Damping layer (10) on the other hand in the connection region (12) have a predefined distance from each other.

Component according to one of the preceding claims, wherein the component (1) is a structural component of a ship, in particular a component of a ship's hull, a ship's wall, a bulkhead, a

Vessel ducts and / or a ship's deck is.

12. Use of a component [1) according to one of the preceding claims in shipbuilding, in particular for a supporting ship structure, for a

Ship's hull, for a ship's wall, for a ship's bulkhead, for one

Ship ventilation duct and / or for a ship deck.

13. A method for producing a component, in particular according to one of

Claims 1 to 11, the method comprising:

Providing at least one base plate (2),

Providing at least one stiffening element (6, 8),

Arranging at least one cover plate (4) on the base plate (2), wherein a damping layer [10] between the base plate (2) and the

Cover plate (4) is provided,

Connecting the stiffening element (6, 8) on the cover plate side with the

Base plate (2) and the cover plate (4) in a connection region (12) of the base plate (2), wherein the connection region (12) at least partially free of the cover plate (4) and the damping layer (10).

14. The method according to claim 13, wherein the stiffening element (6, 8) cohesively, in particular by means of welding with the base plate (2) and the cover plate (4) is connected.

15. The method of claim 13 or 14, wherein the method further comprises:

one-sided or preferably two-sided chamfering of the stiffening element (6, 8) on the side facing the base plate (2)

Stiffening element (6, 8) before connecting the stiffening element (6, 8) with the base plate (2) and the cover plate (4).

16. The method according to any one of claims 13 to 15, wherein the method further comprises location-wise fixing of the stiffening element (6, 8) on the base plate (2), in particular before arranging the cover plate (4) on the base plate (2).

The method of any one of claims 13 to 16, wherein the method further comprises:

Providing at least one cover sheet (4) already provided with a damping layer (10).

Method according to one of claims 13 to 17, wherein the cover plate (4) with the base plate (2) via the damping layer (10) is integrally connected.

Method according to one of claims 13 to 18, wherein the cover plate (2), the damping layer (10) and the stiffening element (6, 8) are arranged to each other such that in the connection region (12) between the

Stiffening element (6,8) on the one hand and the cover plate (4) and the

Damping layer (10) on the other hand, a predefined distance is maintained.

The method of any of claims 13 to 19, wherein the method further comprises

fixing the cover plate (4) on the base plate (2) in places,

in particular before the cover plate-side connection of the stiffening element (6, 8) with the base plate (2) and the cover plate (4).

The method of any of claims 13 to 20, wherein the method further comprises:

Inserting recesses in the cover plate (4) and the

Damping layer (10) before joining to the base plate (2), and joining, in particular welding of the cover plate (4) with the

Base plate (2) in the area of the recesses introduced. Method according to one of claims 13 to 21, wherein a plurality of base plates (2) are each provided with at least one cover plate (4) arranged thereon, and the method further comprises:

Connecting adjacent base plates (2) with the arranged thereon

Cover plates (4) with each other in the butt joint.