DE102015209519A1 - Composite component, method for producing a composite component and motor vehicle - Google Patents

Abstract

The present invention relates to a composite component with a fiber-reinforced plastic component and a metal part and a method for producing this composite component. Furthermore, the present invention relates to a motor vehicle which has the composite component according to the invention. The composite component (10) according to the invention comprises a fiber-reinforced plastic component (13) and a metal part (12) for producing a mechanical fastening, which is non-positively, materially and / or positively connected to the fiber-reinforced plastic (13), wherein the composite component (10 ) has at least one connection device (14) for the mechanical fastening of a seat (60), in particular a motor vehicle seat, on the composite component (10).

Description

The present invention relates to a composite component with a fiber-reinforced plastic component and a metal part and a method for producing this composite component. Furthermore, the present invention relates to a motor vehicle which has the composite component according to the invention.

Due to the reduction in resources and the demand for environmentally friendly technologies, there is a particular requirement in the motor vehicle sector to make vehicles lighter and made of environmentally friendly materials. These goals should be achieved as far as possible while at the same time minimizing costs. For this purpose, composite materials are increasingly being used which combine a low weight with sufficient strength properties. Depending on the configuration of these composite materials they are recyclable and give the motor vehicle at least partially the desired properties.

There are electric vehicles or so-called hybrid vehicles offered, which also have an electric drive in addition to a combustion unit. Such electrically powered vehicles have the advantage that they can be operated without the pollutant emissions generated by the combustion unit. However, electrically powered vehicles currently have the disadvantage that they have a lower range due to the relatively limited capacity of the vehicle battery compared to internal combustion engine driven vehicles. In addition, relatively far-reaching structural changes to the vehicle are necessary due to the integration of the electric drives and the vehicle battery required for them. These have a cost-increasing effect in addition to the investment costs for providing the vehicle battery and the electromotive drives. In addition, due to its own weight, the vehicle battery significantly increases the weight of the motor vehicle provided therewith, thereby increasing the required drive energy, which has a negative effect on the range.

In order to reduce the costs incurred by the integration of the battery in the vehicle and the associated costs see previous concepts such. Example, before to arrange battery cell modules in the vehicle underbody area, such as in a center tunnel of the body or under the rear seats of a passenger car. In addition to the disadvantage of possibly suboptimal arrangement of the center of gravity of the battery cell module and consequently the center of gravity of the entire vehicle, despite the integration into existing body geometry, the manufacturing and assembly costs are relatively considerable.

Other concepts include mounting the battery cell module with additional structures on the body. When required closed construction thereby doubling of body parts, such. As dividing plates, fasteners and spars, realized, resulting in an oversizing of the body in these areas and consequently to an unnecessarily high weight. In addition, required thermal, electrical and / or mechanical functions must be realized by additional components. Often, their arrangement is possible only with increased manufacturing and assembly costs. In addition, due to the necessary compactness of the battery cell module, the complete utilization of the available installation space is relatively difficult to realize.

Another alternative arrangement of battery cell modules on the motor vehicle consists in the distribution of individual modules or individual battery cells on the body. As a result, in turn, additional components are needed, which in turn affect weight and cost-increasing.

Usually, the battery cells or the battery cell module are fastened by means of screw connections to the body, wherein, depending on the weight and / or the size of the respective module, structural stiffeners may still have to be realized for the purpose of realizing the necessary mechanical properties in the connection region.

To accommodate the battery cell module usually tub-like containers made of steel materials are used, which are covered with so-called lids made of plastics. However, such battery receptacles also cause an additional weight, which as described has a negative effect on energy consumption and consequently on the range.

To reduce weight, concepts have already been implemented which use a thermoset instead of metals for a battery receptacle or also back-injected so-called "organo sheets". For further weight minimization and / or at least partial strength increase battery receptacles or battery mounting devices have been created, which consist of fiber-plastic composites.

From the WO 2012/028689 A1 is a shielded against electromagnetic fields plastic-organo-sheet hybrid structural component is known, which is preferably used as a battery case. This structural component is made of a Fabric or scrim of a fibrous filler present in several layers, in which also carbon fibers or metal fibers can also be incorporated. This fabric or scrim is embedded in a thermoplastic and may additionally have another plastic component. The carbon or metal fiber structure woven into an organic sheet serves as a shield against electromagnetic fields.

The EP 2332761 B1 teaches a battery shell made of a resin material which is connected to a metallic frame.

From the DE 10 2011 107 007 A1 is a surrounding a battery frame as well as a battery covering lid made of a pure plastic material known.

The DE 10 2013 217 388 A1 discloses a method for producing a fiber-composite plastic component, in which a support plate part, in particular an organic sheet part, is inserted as an insert into a mold cavity of an injection mold simulating the negative mold of the plastic component, and a fiber-reinforced plastic material is injected in an injection step. The composite component produced thereby is used as a battery carrier wall in a rear seat wall of a motor vehicle.

The present invention is based on the object of specifying a composite component as well as a method producing this composite component, with which a component of a vehicle is made available, which combines economic manufacturability with low court and sufficiently high strength. Another aspect of the object underlying the invention is to provide a vehicle which has the component according to the invention. This object is achieved by the component according to the invention according to claim 1 and by the inventive method for producing the component according to claim 4 and by the motor vehicle according to claim 8. Advantageous embodiments of the composite component according to the invention are specified in the subclaims 2 and 3. Advantageous embodiments of the method according to the invention for the production of the composite component are specified in the subclaims 5 to 7. Advantageous embodiments of the motor vehicle according to the invention are specified in the subclaims 9 and 10.

The composite component according to the invention comprises a fiber-reinforced plastic component and a metal part for producing a mechanical fastening, which is positively, materially and / or positively connected to the fiber-reinforced plastic, wherein the composite component at least one connection device for the mechanical fastening of a seat, in particular a motor vehicle seat, on Compound component has. The composite component according to the invention can also be referred to as a vehicle structural component. The composite component comprises a fiber-reinforced plastic material and embedded therein the metal part. Preferably, the fiber-reinforced plastic fibers with a length of 5 mm to 20 mm, in particular fibers with a length of 10 mm to 20 mm. The connection device for the mechanical fastening of a seat should preferably be realized on the metal part, also referred to as a depositor, such. B. in the form of one or more threaded elements. Such a threaded element may, for. B. an internal thread for the realization of a screw connection for the purpose of fixing a vehicle seat or a seat rail on the metal part. The metal part or the so-called insert is preferably a longitudinally shaped component, in particular a sheet metal component, which has mold elements which cause a three-dimensional extent or three-dimensionally aligned projections of the metal part. Advantageously, the composite component according to the invention comprises a total of four such metal parts or inserts, in which two motor vehicle seats, such. As the front seats can be connected via seat rails.

The metal part itself preferably consists of a hot-hardened and micro-alloyed sheet metal material, such as. H300LA, H3300LA, H3800LA, with increased yield strength, e.g. with a yield strength in the range of 300 MPa-500 MPa. For the production of the metal part of this sheet material is profiled, provided with a hole pattern and optionally with a surface adhesive layer, such. with a polyamide-based adhesion promoter.

This provides a total of an innovative fiber-plastic composite component with a high degree of functional integration, high load capacity and low weight. In particular, due to the combination of the fiber-reinforced plastic with the metal part thus exists a component which in addition to its low weight and its adaptable to local requirements strength also allows a simple mechanical connection of the composite component to external structures, in particular to peripheral structures. These properties are combined with the possibility of simple and stable mechanical connection of other facilities to the component, such. As the attachment of a motor vehicle seat directly to the composite component or by means of a seat rail.

The plastic used is preferably a long or short fiber reinforced, in particular glass fiber reinforced thermoplastic such. B. Polypropylene or polyamide. This plastic may additionally be mixed with halogen, phosphorus or boron based fire protection additives.

In polypropylene-based plastic, in particular, maleic anhydride as a fiber-matrix coupler can promote compatibility between the metal part and the fiber material as well as between the polymer matrix and the fiber material. As a result, the desired strength and stiffness properties and the chemical resistance remain even under changing thermal conditions over the period of use of the composite component.

Due to the flexibility in the processing of the plastic molding elements can be produced in a simple and cost-effective manner, which can be used for different functions such. As stiffeners or supply or discharge lines can be used and possibly also improve the damping properties of the composite component.

In particular due to the special orientation of the fiber structures present in the plastic, the strength and stiffness properties can be specifically influenced in areas of the composite component, so that in turn an overall lower weight of the composite component can be achieved. The strength properties set in this way can, for. B. on desired properties of a vehicle equipped with the composite component according to the invention in the case of a pulse, ie z. B. in an accident situation, be matched.

In addition, such directed fiber structures provide at least partially for a lower creep of the component.

The metal part or the insert in the composite component gives it an increase in strength and an increase in the total modulus of elasticity, combined with a lower creep tendency of the composite component and an improvement in its ductile behavior.

The composite component according to the invention can be integrated into a vehicle underbody structure, in particular below the front seats, and the battery or the battery cell module can be connected to the composite component from below. In addition to the attachment of the battery or the battery cell module, the composite component also serves as a cover of the battery. However, the combination of the functions of the seat attachment and the weight absorption or positioning of the battery significantly affects because only one component is used for both functions, which has a low weight and sufficient strength properties and excellent damping properties with electrical, thermal and acoustic insulation properties, shield against electromagnetic fields as well as the simple possibility of integrating additional functions.

The composite component according to the invention preferably comprises at least one first fastening device for the mechanical fastening of the composite component to a body of a motor vehicle and / or a second fastening device for the mechanical fastening of a battery cell module to the composite component. Preferably, the attachment of the battery cell module also takes place on the metal part of the composite component and thus on the same part, which also serves for seat mounting, but not to be ruled out according to the invention that the attachment of the battery cell module takes place on a metal part other than the seat attachment or in areas the composite component, in which this is formed only by the fiber-reinforced plastic. By means of said fastening devices, it is possible in a simple manner to fasten the composite component to a body and mechanically fix one or more seats on the composite component as well as a battery on the composite component.

In a preferred embodiment of the metal part of the composite component according to the invention it is provided that the metal part is a three-dimensionally shaped sheet metal component. In alternative embodiments, the metal part is present only as a metal strip or as a rod.

In particular, in an embodiment in which the metal part of the composite component realizes a tunnel space, z. B. be integrated in this tunnel space facilities for the fixation of connecting lines. Furthermore, such a tunnel space gives the composite component according to the invention an increased torsional strength.

The composite component according to the invention ensures a high electrical surface resistance as well as a high electrical volume resistance. In addition, it is provided with a high dielectric strength as well as a high tracking resistance. Due to the preferred use of a thermoplastic as a plastic, it is highly recyclable and, in particular by gluing, repairable with little effort.

Furthermore, the composite component according to the invention in a high variety of variants can be produced inexpensively, in a simple manner by appropriate means or process steps z. B. brackets and bushings of Lines or service flaps can be integrated. Due to the high plastic content, the composite component has a high corrosion resistance and can be sealed in a simple manner in the region of the connection of the composite component to the body, wherein the seal is possibly realized by means of splices, which can also absorb a proportion of the introduced weight forces. Furthermore, the composite component may have interfaces or receptacles for interfaces of a bus system.

To achieve the object, a method for producing a composite component is further provided, which comprises a metal part for producing a mechanical fastening, wherein the metal part non-positively, material and / or positively connected with a fiber-reinforced plastic and the composite component at least one connection device for mechanical attachment of a seat on the composite component. The inventive method comprises the steps of the provision of the metal part, the provision of the fiber-reinforced plastic, the production of a non-positive, material and / or positive connection between the metal part and the fiber-reinforced plastic, so that a composite component is present, which is the metal part and the fiber-reinforced plastic as components, as well as the production of at least one connection device for the mechanical fastening of a seat on the composite component. It is thus provided according to the invention a method for producing the composite component according to the invention.

For the production of metal parts or so-called deposit sheet metal materials are preferably profiled, provided with a hole pattern and optionally with a surface adhesive layer. The preparation of a connection device and / or a fastening device can use the generated hole image, z. B. by threaded elements are introduced in the region of the holes produced in the metal part or attached to this. The preparation of the connection device or fastening device can be carried out prior to introduction of the metal part in the fiber-reinforced plastic or even thereafter. Between the metal part and the fiber-reinforced plastic a positive, non-positive and / or cohesive connection is made. The metal part, which preferably has a length between 300 mm and 1000 mm, is preferably surrounded with a fiber-reinforced plastic which has relatively long fibers in the range of a preferred length of 20 mm to 50 mm. As a result, mechanical properties of the composite component can be realized, which can not be provided with conventional materials. Optionally, in the course of the production method according to the invention, elements are produced with which desired mechanical, thermal, electrical and / or acoustic functions can be realized or influenced. For example, other elements can be introduced, with the help of which electromagnetic fields can be optimally shielded, or even elements for targeted vibration absorption or thermal insulation and noise reduction.

On the one hand, the method according to the invention enables a rational production of complex designed and highly resilient geometric structures and on the other hand the production of a composite component with low weight and the possibility of optimized weight distribution when it is used in a motor vehicle.

By using the long- or short-fiber reinforced, in particular glass fiber reinforced thermoplastics in combination with the metal part as depositors, a high modulus of elasticity and high strength properties with low creep and ductile behavior are combined.

In a preferred embodiment of the method according to the invention for producing the composite component, it is provided that method steps are also carried out with which a first fastening device for mechanically fastening the composite component to a body of a motor vehicle and / or a second fastening device for mechanically fastening a battery cell module to the composite component are produced. Again, the invention is not limited to the order shown, but the respective fastening device can be generated both before and after the introduction of the metal part in the plastic-fiber mixture.

In a method alternative, it is provided that the force, material and / or positive connection between the metal part and the fiber-reinforced plastic is produced by injection molding. This method embodiment has the advantage of simple control and low distortion of the composite component produced thereby, so that no distortion-related reworking effort arises.

In a further alternative method it is provided that the force, material and / or positive connection between the metal part and the fiber-reinforced plastic by pressing, in particular by a direct extrusion process, is generated. In the direct extrusion process, a mixture of the plastic used with the fibers for the production of fiber-reinforced plastic directly in the press used, in which then the mixture of plastic and fibers and the metal part is pressed. This takes place Usually also a "flow" mentioned movement of the plastic used and the fibers under the applied pressing pressure in the cavity of the press, so that the material located there completely fills the cavity. This method is to be carried out in particular when using long fibers of the plastic-fiber mixture.

To realize the necessary long flow paths for the purpose of flowing around the metal parts with the fiber-reinforced plastic flowable long-fiber receptors are preferably used with a fiber content of 30% -50% to ensure the connection can.

The fibers should in particular have a length of 5 to 25 mm, preferably a length of 10 to 20 mm. When implementing the extrusion process, fibers with a length of up to 50 mm can be used, whereby high mechanical strength values of areas of the composite component provided with long fibers can be achieved. The fibers used are preferably glass fibers.

To solve the problem, a motor vehicle, in particular a passenger car, is provided, which has a composite component according to the invention. At least one seat of the vehicle is connected to this composite component, wherein the composite component is located below the seat attached thereto. The composite component is preferably arranged and configured such that it can absorb at least 50% of the weight of the seats arranged thereon and consequently also persons located thereon.

In a further embodiment of the motor vehicle according to the invention it is provided that this has at least one battery cell module, wherein the composite component is arranged on the body of the vehicle or on a structures attached thereto, that it covers the battery cell module at least partially and preferably completely. In particular, the battery cell module may be a plurality of individual traction batteries or traction battery cells, each forming a unit. In this function, the component according to the invention can also be referred to as a battery cover. The structure, which may be fastened to the body and to which the composite component according to the invention can be arranged, is in particular an aluminum profile frame, which may have a bearing part on the bodywork. In this embodiment of the frame, this has at least on its top openings, which are also covered by the composite component. The frame is preferably fixedly arranged on or in a floor structure of the motor vehicle. The composite component which also has the function of a cover is preferably connected to the frame by means of gluing and / or screwing, in which case these adhesions or screw connections represent the first fastening device of the composite component. Below the space delimited by the frame, the motor vehicle according to the invention preferably comprises an underbody cover, whereby the space delimited by the frame is closed on its underside.

Preferably, the battery cell module is mechanically connected to the composite component such that the composite component carries at least 50% of the weight and preferably the entire weight of the battery cell module. This means that the battery cell module is connected to the composite component from below by means of the second fastening device, wherein the second fastening device transmits the weight force of the battery cell module into the composite component.

With the present invention, a contribution is made to reducing pollutant emissions in the operation of motor vehicles and a way of increasing the vehicle performance, in particular of an electrically driven vehicle in the use phase. These advantages are achieved in particular by the weight reduction as well as the optimal space utilization as well as maintaining or even improving the mechanical properties. The composite component can be produced cost-efficiently, in particular in large-scale production, and can be assembled simply and safely. It also offers the possibility of multiple functional integrations due to its degree of freedom in design.

The invention will be explained below with reference to the embodiments illustrated in the accompanying drawings.

Show it

1 : a vehicle underbody structure with seats arranged thereon in perspective view,

2 : the composite component according to the invention with a frame arranged thereon for receiving battery cell modules in a sectional view from the side,

3 a motor vehicle with an indicated seat as well as an indicated composite component in a view from the side, and

4 : A flow chart to illustrate the steps for the production of the composite component.

How out 1 it can be seen forms the composite component according to the invention 10 a part of a subsoil structure 1 of a vehicle. The composite component 10 is sitting under it 60 arranged by means of seat rails 61 on the composite component 10 are mounted. Laterally, the composite component closes on sill 2 on, and frontally, it connects to wheel arches 3 or wheel arches. It can be seen that the composite component 10 In the embodiment shown here four metal parts 12 which faces up out of the composite component 10 sticking out of the plane. At these metal parts 12 are the seat rails 61 attached, in turn, the seats 60 are mounted.

Out 2 is the structure of the composite component 10 as well as its interaction with a frame 80 for receiving battery cell modules not shown here and its attachment to the body.

First, the details of the composite component 10 described. The composite component 10 comprises at least one region consisting only of a fiber-reinforced plastic 13 is made. In this fiber reinforced plastic 13 is at least one metal part 12 , which is also referred to as depositor embedded. This metal part 12 is in the sectional view of 2 the element to which by means of connection devices 14 by threaded elements 15 such as cap nuts are realized, a seat rail 61 connected, the metal part 12 for the seat rail 61 realized a 2-point edition. About investment areas 81 is also the frame 80 connected to the composite component for receiving the battery cell modules.

Furthermore, the metal part forms 12 a front connection area 18 and a rear connection area 19 out, by means of which the metal part 12 and thus the entire composite component 10 over first fastening devices 30 , respectively, the front connection area 18 and the rear connection area 19 are assigned, is attached. In the embodiment illustrated here, the first attachment means 30 essentially designed as holes, which are used to carry out the screw connections of the metal part shown here 12 with profiles 70 , the front and back of the frame 80 are arranged serve. These profiles 70 Form a part of the body of a motor vehicle or are fixedly arranged on the body. At the respective profile 70 is as shown in the direction of the other profile 70 protruding projection 71 arranged, being between this projection 71 and the metal part 12 of the composite component 10 one sealing element each 91 is arranged to that of the profiles 70 delimited space opposite the composite component 10 seal.

It can be seen that the rear connection area 19 of the composite component 10 is designed angled, so that there realized first fastening device 30 in the form of a screw substantially horizontally in the profile 70 extends. This results in addition to a positive fixation of the composite component 10 in a horizontal translational degree of freedom.

The metal part 12 is deformed so that it is a cavity 21 formed. This cavity is used, inter alia, to increase the connection device 14 for attaching the front end of the seat rail 61 , In or on the metal part 12 are the second fastening devices 40 arranged, with which over the illustrated screw connections 50 a fixation of the frame 80 realized on the composite component. Flat areas of the composite component 10 that is not through the metal part 12 are formed, consist essentially of the fiber-reinforced plastic 13 as well as the area between the metal parts 12 and also the respective laterally adjacent boundary walls 20 , That is, the composite component 10 on its surface 16 essentially by the fiber-reinforced plastic 13 is executed and only partially by one or more metal parts 12 is trained. The bottom 17 of the composite component 10 is preferably completely from the fiber reinforced plastic 13 covered.

The composite component 10 has preferably been made such that the fastening means 30 . 40 only after connection of the metal part 12 with the fiber reinforced plastic 13 were introduced.

It can be seen that the composite component according to the invention 10 takes over several functions, namely the attachment of the seat rails 61 and thus the seats, the bracket of the frame 80 for receiving battery cell modules, not shown here, as well as the covering and sealing of the profiles 70 demarcated room to the top. Furthermore, the composite component generates 10 due to the fixed mechanical connection with the frame 80 as well as with the profiles 70 and the seat rails 61 an increased stability of in 2 illustrated arrangement.

The frame 80 defines the battery compartment 82 which serves to receive at least one and preferably a plurality of battery cell modules of the traction battery. The frame 80 has several screw channels 83 on top of the frame 80 in investment areas 81 lead to, in turn, the composite component 10 is applied. The screw channels 83 aligned with the second fastening devices 40 in the composite component 10 so through the screw channels 83 and with the second attachment means 40 there screw 50 can be realized that the frame 80 firmly to the composite component 10 connect so that the composite component 10 the weight of the frame 80 as well as disposed therein battery cell modules at least partially receives. Below the frame 80 is an underbody cover 90 arranged by means of fasteners 92 , such as B. screw fasteners, fixed to the laterally arranged profiles 70 connected is. This limits the underbody cover 90 the one from the profiles 70 defined space at the bottom. Between the underbody cover 90 as well as the profiles 70 is each a sealing element 91 arranged, which is a seal between underbody cover 90 and profile 70 realized.

In 3 is a motor vehicle according to the invention 100 shown in view from the side, with a driver's seat 60 it can be seen that by means of seat rails 61 on the composite component according to the invention 10 is arranged. Below the composite component 10 is as shown the frame 80 connected to receive battery cell modules. However, the invention is not limited to the illustrated position and size of the composite component and the frame, but it may extend the composite component and deviating over the entire length of the vehicle underbody structure and thus also have fastening devices rear seats and possibly also a frame 80 have, which extends in the direction of the vehicle rear than it extends in 3 is apparent. In addition, the illustrated depth of the frame 80 the height position of the composite component 10 and the height of the accommodated in the frame battery cell modules adaptable.

The composite component according to the invention 10 forms in the illustrated embodiment, the single component, which limits the passenger compartment on the underside at least in segments, and also serves to attach at least one seat and the connection and the weight of battery cell modules.

In 4 are shown in a flowchart several alternatives for the production of the composite component according to the invention. All steps marked with A refer to the processing and processing of the metal part of the composite component and all steps marked B refer to the processing and processing of plastic.

First, the processing steps for the production of the metal part will be discussed. First, steel sheet A is provided, which is subjected to a forming process A1 if necessary. The formed steel sheet can then be further supplied to a trimming A2, in which case in particular holes can be introduced. As a further step, the steel sheet can be subjected to a pretreatment, in particular a surface pretreatment A3, in order to improve the adhesion of plastic, in particular of fiber-reinforced plastic, and / or to ensure a higher corrosion resistance. Thereafter, the temperature of the steel sheet can be increased by means of preheating A4. This can be followed by the insertion A5 of the steel sheet in a mold and the local fixing A6.

It is off 4 it can be seen that the steel sheet A in the fixed state is now subjected to an injection molding process AB or a pressing process BA. Both process alternatives injection molding AB and pressing BA are carried out under supply of fiber-reinforced plastic. Therefore, the preparation or processing of this plastic will be explained first.

Either short-fiber granules B1 are provided or fibers in granular form B2 are produced and provided by means of an extruder or a matrix is plasticized in an extruder and subjected to blending process B3 with endless fibers shortened to length and this mixture is provided.

Short fibers should have a length between 0.1 mm to 1 mm.

If necessary, the fibers made available can still be subjected to a predrying process B4. Thereafter, in a compounding process B5, the mixing with plastic, preferably with a thermoplastic.

The material composite obtained in this way is then fed into the injection molding process AB in preferably extruded form.

Alternatively, after carrying out the further steps of heating the composite B6, possibly handling B7 and also inserting B8 and possibly aligning B9 of the composite, the composite material is fed to a pressing process BA.

In the injection molding process, the material mixture is in such a form in which the metal part made of steel sheet A is already placed introduced that the fiber-reinforced plastic, the steel sheet A substantially encloses and a positive, positive and / or cohesive connection with the steel sheet A. enters the metal part.

During the pressing process BA, the steel sheet A as well as the fiber-reinforced plastic are pressed together in a cavity, so that here also the positive, positive and / or cohesive Forming connection between the fiber-reinforced plastic and the steel sheet A of the metal part.

Thus, both in the injection molding process AB and in the pressing process BA composite components made of fiber-reinforced plastic with metal inserts are produced, wherein in both process alternatives relatively long fibers can be used, which give the composite component produced with low weight excellent mechanical properties.

The further steps after the injection molding process AB or the pressing process BA can proceed in the same way or be exposed to variants, depending on the tolerances and surface properties of the composite component produced in the injection molding process AB or pressing process BA.

After the injection molding process AB or pressing process BA is carried out a removal C of the composite component produced from the respective cavity and a cooling D. When necessary trimming to maintain the desired geometrical dimensions, the composite component produced can be inserted in an insertion step E in a cutting tool in which a Bleed F and possibly also a Entgratungsvorgang G. Insofar as these cutting operations are not necessary, as is usually the case with an injection molding AB, the composite component can also be supplied immediately after cooling D a mounting process H, in which, insofar necessary , Additional attachments are arranged on the composite component. In such an assembly step H z. B. the in 2 apparent second fastening devices 40 be introduced.

The injection molding proves to be particularly advantageous if instead of downstream mounting H some parts or mold elements to be incorporated directly in the original molding of the composite component. In addition, a high surface quality can be realized. Furthermore, more complex geometries can be realized by injection molding AB than with the pressing method BA. However, longer cycle times may be acceptable for the production of the composite component.

The advantage of the process alternative of the pressing method BA lies in particular in the shorter cycle time and the possibility of being able to process longer fibers and thus to provide composite components with correspondingly increased strength properties.

As a particular embodiment of the pressing BA, in particular, the direct extrusion process is suitable, in which a mixture of plastic and fibers is introduced directly into a press. The plastic component can be z. As polypropylene, which is mixed with a volume fraction of 30 percent long fiberglass glass fiber, so that a material mixture PP / GF30 is present as a base material.

Long fibers used herein may be up to 50mm in length.

This base material, in turn, may be combined with multiple layers of fully consolidated polypropylene body tissue and 47 volume percent glass fiber, a so-called PP / GF fabric.

With the desired wall thickness of the composite component to be produced of 5 mm to 6 mm, the time of cooling D should be about 45 s. The mixture of plastic and fibers as well as the fully consolidated PP / GF fabric can be inserted into the pressing tool by means of a robot and possibly a needle gripper system.

For processing in the pressing process BA, the PP / GF fabric is preferably heated by means of a convection oven to a desired processing temperature. The fabric blank can also be preheated, such. B. via an infrared heater. All components are used together with the steel sheet A in the pressing tool or its cavity, positioned there and possibly fixed and z. B. pressed by means of an upper piston press for composite component according to the invention. The direct extrusion process described is particularly useful for high volume applications to realize high throughput rates and produce material efficient. Preferably, the mixture of plastic and fibers from raw materials such. B. the fibers, additives and matrix plastics inline compounded or mixed. In particular, when using long fiber reinforced plastic with oriented fiber structure, the metallic inserter is preferably heated to a higher temperature in the preheating step A4, e.g. to a temperature of 70 ° C-120 ° C, to heat. However, the possibly resulting distortion of the component due to anisotropic material behavior must be taken into account or compensated in subsequent trimming operations.

During the pressing process, preferably a fusion of the mixture of fibers and plastic with the metallic insert takes place. In any case, a positive connection with the metal part is realized.

LIST OF REFERENCE NUMBERS

 1

 Vehicle underbody structure

 2

 sill

 3

 wheel well

 10

 composite component

 12

 metal part

 13

 fiber reinforced plastic

14

connecting device

 15

 threaded element

 16

 surface

 17

 bottom

18

 Front connection area

19

Rear connection area

 20

 Lateral boundary wall

21

cavity

 30

 first fastening device

 40

 second fastening device

 50

 screw

 60

 Seat

 61

 Seat rail

 70

 profile

 71

 head Start

 80

 frame

 81

 plant area

 82

 battery room

 83

 screw

 90

 Under Cover

 91

 sealing element

 92

 connecting element

 100

 motor vehicle

 A

 sheet steel

 A1

 reshape

A2

Trimming (into the hole trimming)

 A3

 preparation

 A4

 preheat

 A5

 insert

 A6

 Fix

 FROM

 Spritzgieenß

 BA

 Press

 B1

 Short fiber granules

B2

Introduction of fibers in granular form from an open extruder directly into a mold (G-LFT)

B3

Plastification of a matrix in an extruder and mixing of the matrix with length-shortened continuous fibers in a mixer

B4

Pre-drying

 B5

 compounding

 B6

 Heat

 B7

 handle

 B8

 insert

 B9

 Align

 C

 Remove

D

cooling down

 e

 insert

 F

 trimming

 G

 deburring

 H

 Assembly

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2012/028689 A1 [0010]
• EP 2332761 B1 [0011]
• DE 102011107007 A1 [0012]
• DE 102013217388 A1 [0013]

Claims (10)

Composite component ( 10 ) comprising a fiber-reinforced plastic component ( 13 ) as well as a metal part ( 12 ) for producing a mechanical fastening which is non-positively, materially and / or positively with the fiber-reinforced plastic ( 13 ), wherein the composite component ( 10 ) at least one connection device ( 14 ) for the mechanical fastening of a seat ( 60 ), in particular a motor vehicle seat, on the composite component ( 10 ) having. Composite component according to claim 1, characterized in that the composite component ( 10 ) at least one first fastening device ( 30 ) for the mechanical fastening of the composite component ( 10 ) on a body of a motor vehicle and / or a second fastening device ( 40 ) for the mechanical attachment of a battery cell module to the composite component ( 10 ) having. Composite component according to one of the preceding claims, characterized in that the metal part ( 12 ) is a three-dimensionally shaped sheet metal component. Method for producing a composite component ( 10 ), which is a metal part ( 12 ) for producing a mechanical fastening, wherein the metal part ( 12 ) kraft-, material- and / or positive fit with a fiber-reinforced plastic ( 13 ) and the composite component ( 10 ) at least one connection device ( 14 ) for the mechanical fastening of a seat ( 60 ) on the composite component ( 10 ), comprising the following steps: - Provision of the metal part ( 12 ), - the supply of fiber-reinforced plastic ( 13 ), - production of a force, substance and / or positive connection between the metal part ( 12 ) and the fiber reinforced plastic ( 13 ), so that a composite component ( 10 ) is present, the metal part ( 12 ) and the fiber reinforced plastic ( 13 ) as components, - production of at least one connection device ( 14 ) for the mechanical fastening of a seat ( 60 ) on the composite component ( 10 ). Method for producing a composite component according to claim 4, characterized in that the force, material and / or positive connection between the metal part ( 12 ) and the fiber reinforced plastic ( 13 ) is produced by injection molding. Method for producing a composite component according to claim 4, characterized in that the force, material and / or positive connection between the metal part ( 12 ) and the fiber reinforced plastic ( 13 ) is produced by pressing, in particular by a direct extrusion process. Process for producing a composite component according to one of Claims 4 to 6, characterized in that the fiber-reinforced plastic ( 13 ) Has fibers with a length of 5 mm to 25 mm, in particular fibers with a length of 10 mm to 20 mm. Motor vehicle ( 100 ), in particular passenger cars, comprising a composite component which comprises a metal part ( 12 ) for producing a mechanical fastening which is non-positively, materially and / or positively with a fiber-reinforced plastic ( 13 ), wherein the composite component ( 10 ) at least one connection device ( 14 ) for the mechanical fastening of a seat ( 60 ) on the composite component ( 10 ) having. Motor vehicle according to claim 8, characterized in that the motor vehicle ( 100 ) has at least one battery cell module, wherein the composite component ( 10 ) is arranged on the body or on a structure attached thereto such that it covers the battery cell module at least partially and preferably completely. Motor vehicle according to claim 9, characterized in that the battery cell module mechanically so with the composite component ( 10 ), that the composite component ( 10 ) carries at least 50% of the weight, preferably the entire weight, of the battery cell module.

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