DE102019106446A1 - Method for producing a thermoplastic joint, method for repairing a first component and joint - Google Patents

Abstract

A method is provided for producing a thermoplastic joint (125) between a first component (100) and a second component (102), comprising the additive application of a first functional layer (104) made of a first amorphous thermoplastic material to a surface area of a first component (106), wherein the first component (100) is made of a thermoplastic material and wherein the first amorphous thermoplastic material remains amorphous thermoplastic during the application, the additive application of a second functional layer (126) made of a second amorphous thermoplastic material on a surface area of a second Component (102), wherein the second component is made of a thermoplastic material and wherein the second amorphous thermoplastic material remains amorphous thermoplastic during application and the connection of the first component (100) and the second component (102) in a joining area (124) by means of the first F Unktionsschicht (104) and the second functional layer (126).

Description

The present invention relates to a method for producing a thermoplastic joint between a first component and a second component.

The present invention also relates to a method for repairing a first component.

The present invention further relates to a thermoplastic joint connection, comprising a first component and a second component.

The present invention is based on the object of providing a method of the type mentioned at the outset which leads to a firm connection of the first component and the second component.

• - additives Aufbringen einer ersten Funktionsschicht aus einem ersten amorphen thermoplastischen Material auf einen Oberflächenbereich eines ersten Bauteils, wobei das erste Bauteil aus einem thermoplastischen Material gefertigt ist und wobei das erste amorphe thermoplastische Material während des Aufbringens amorph thermoplastisch bleibt; und
• - additives Aufbringen einer zweiten Funktionsschicht aus einem zweiten amorphen thermoplastischen Material auf einen Oberflächenbereich eines zweiten Bauteils, wobei das zweite Bauteil aus einem thermoplastischen Material gefertigt ist wobei das zweite amorphe thermoplastische Material während des Aufbringens amorph thermoplastisch bleibt; und
• - Verbinden des ersten Bauteils und des zweiten Bauteils in einem Fügebereich mittels der ersten Funktionsschicht und der zweiten Funktionsschicht.

According to the invention, this object is achieved by a method for producing a thermoplastic joint connection between a first component and a second component, comprising:

• additive application of a first functional layer made of a first amorphous thermoplastic material to a surface area of a first component, the first component being made of a thermoplastic material and wherein the first amorphous thermoplastic material remains amorphous thermoplastic during the application; and
• additive application of a second functional layer made of a second amorphous thermoplastic material to a surface area of a second component, the second component being made of a thermoplastic material, the second amorphous thermoplastic material remaining amorphous thermoplastic during the application; and
• Connecting the first component and the second component in a joining area by means of the first functional layer and the second functional layer.

The joining area preferably comprises the first functional layer and the second functional layer or is formed therefrom. In particular, the joining area comprises a transition area between the first functional layer and the first component and a transition area between the second functional layer and the second component.

In the context of the invention, a joint connection is to be understood as a permanent connection of the first component and the second component in the joint area. The joint connection is preferably an integral connection of the first component and the second component in the joint area.

All materials that are characterized as thermoplastic are preferably thermoplastic polymer materials.

In the case of amorphous thermoplastic materials, the individual molecular chains of the materials are randomly intertwined.

The additive application enables an exact positioning of the functional layers. Material can be saved compared to a less controlled application. This increases the economic efficiency of the method in comparison to conventional methods in which functional layers are produced integrally with the first or second components.

With amorphous thermoplastic functional layers for connecting the first and the second component, particularly durable joint connections can be achieved between the components.

Because the first functional layer and / or the second functional layer are applied additively, the manufacturing processes of the first component and / or the second component can be ended before the first functional layer and / or the second functional layer are applied.

Degradation or other heat damage in the first functional layer and / or the second functional layer, which arise due to high temperatures during component manufacture, can be avoided.

For example, the first component and / or the second component can be tempered before or after the first and / or the second functional layer are applied. The tempering of the first component and the second component is typically necessary after the production of the first and the second component.

In addition, tempering of thermoplastic components is often used to optimize the material properties of the components, preferably to increase the crystallinity of the thermoplastic components.

The additive application of the first and / or second functional layer can also avoid a strong mixing of the first amorphous thermoplastic material of the first functional layer and the thermoplastic material of the first component or a mixing of the second amorphous thermoplastic material of the second functional layer and the thermoplastic material of the second component or minimized become. In this way, a high quality of the resulting joint connection can be guaranteed.

The first component and / or the second component are preferably made from a partially crystalline material which, if necessary, can contain fibers. The materials of the first component and the second component will be discussed in greater detail below.

Mixing the materials of the components and the functional layers would mean that crystallization nuclei from the material of the first component could diffuse into the amorphous thermoplastic material of the first functional layer or that crystallization nuclei from the material of the second component could diffuse into the amorphous thermoplastic material of the second functional layer could diffuse. When the materials are mixed, the crystallization nuclei could induce crystallization in the amorphous thermoplastic materials of the first functional layer and the second functional layer.

By avoiding or minimizing the intermixing of the materials of the components and the functional layers, the amorphous structures of the first functional layer and the second functional layer can be preserved. Thus, with the method according to the invention, high-quality, in particular particularly durable, joint connections can be produced.

Complete heating of the first and / or second component, as is necessary with conventional joining processes, is unnecessary. On the one hand, this is energy-efficient and, on the other hand, it can shorten process times, since the heating of the first component and / or the second component involves longer heating phases. This in turn leads to a reduction in process costs.

Additive processes are preferably faster than an integral production of the functional layer and component. As a result of the reduced process times, mixing of the materials of the functional layer and the component can be further minimized.

The method for producing a thermoplastic joint connection enables the functional layers to be applied in a controlled manner to areas of the first component or the second component to be joined. It can be ensured that a functional layer is present in the joining area on the first component and the second component at every point of the respective component at which a joint is to be produced.

According to a preferred embodiment, the first functional layer is applied over the entire area to a surface of the first component. The surface area of the first component then corresponds to the surface of the first component.

The second functional layer is preferably applied over the entire area to a surface of the second component. The surface area of the second component then corresponds to the surface of the second component.

Alternatively, it can be provided that only areas of the surface of the first component are provided with the first functional layer, while other areas of the surface remain unchanged. In particular, only areas of the surface of the second component are provided with the second functional layer, while other areas of the surface remain unchanged.

The joint connection between the first component and the second component is produced exclusively in the surface areas of the first component and the second component to which the first functional layer or the second functional layer was applied.

For example, the first component and the second component are welded to one another in the joining area, which will be discussed in greater detail below.

The method according to the invention is preferably used in areas in which high-temperature thermoplastics are used. Such areas are, for example, the aerospace industry, in which high material requirements, in particular with regard to the durability of the material, often have to be met. In order to meet the requirements, higher material costs are often accepted.

However, the process can also be used in the automotive sector.

An example from the aerospace industry in which the method according to the invention can be used in the future is the production of a thermoplastic fuselage for future generations of aircraft. The method is used here in areas in which a thermoplastic first component and a thermoplastic second component are to be permanently connected to one another.

The first functional layer and / or the second functional layer are preferably applied in a spatially controlled manner.

The first functional layer is preferably melted locally for application to the surface area of the first component. In particular, the second functional layer is melted locally for application to the surface area of the second component.

According to a preferred embodiment, the first functional layer is melted locally immediately before material contact of the first amorphous thermoplastic material of the first functional layer with the surface area of the first component.

The second functional layer is preferably melted locally immediately before material contact of the second amorphous thermoplastic material of the second functional layer with the surface area of the second component.

The local melting can make long holding times, which are necessary for complete heating of the first and / or second component, unnecessary. In contrast to long holding times, a comparatively short melting time is sufficient for local melting.

The first amorphous thermoplastic material and / or the second thermoplastic material preferably have a comparatively low viscosity in a melted state. In this way, a controlled application can take place in the melted state.

It can be favorable if the first functional layer is materially connected to the first component. In particular, the second functional layer is materially connected to the second component.

In the case of a resulting bond between the first functional layer and the first component or the second functional layer and the second component, an interface between the first amorphous thermoplastic material of the first functional layer and the thermoplastic material of the first component or the second amorphous thermoplastic material of the second functional layer and the thermoplastic material of the second component formed. Mixing is - as already mentioned - minimized.

It can be advantageous if the first functional layer is heated to a first processing temperature by means of a heating device and if the second functional layer is heated to a second processing temperature by means of the heating device or a further heating device.

In particular, the first processing temperature is lower than a melting temperature of the thermoplastic material of the first component. In particular, the second processing temperature is lower than a melting temperature of the thermoplastic material of the second component.

According to a preferred embodiment, the first processing temperature is approximately 10 ° C. to approximately 15 ° C. lower than the melting temperature of the thermoplastic material of the first component.

The second processing temperature is preferably approximately 10 ° C. to approximately 15 ° C. lower than the melting temperature of the thermoplastic material of the second component.

The heating of the first functional layer and / or the second functional layer by means of the heating device preferably results in a local melting of the first functional layer and / or the second functional layer.

The selection of the first and / or second processing temperature can further minimize mixing of the first amorphous thermoplastic material of the first functional layer and the thermoplastic material of the first component and / or mixing of the second amorphous thermoplastic material of the second functional layer and the thermoplastic material of the second component.

The first amorphous thermoplastic material and / or the second amorphous thermoplastic material are preferably made from one or more of the following polymer materials in amorphous thermoplastic modification: polyether ketone ketone (PEKK), polyether ether ketone (PEEK), acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile -Butadiene-styrene-polycarbonate copolymers (ABS / PC), acrylonitrile-styrene-acrylate copolymers (ASA), polystyrenes (PS), especially high-impact polystyrenes (HIPS), polycarbonates (PC), polycarbonate-polybutylene terephthalate copolymers (PC / PBT), polyethyleneimines (PEI), polyethersulfones (PES), polymethyl methacrylate (PMMA), polyethylene oxides (PEO), polyphenylene ethers (PPE), polyethylene glycols (PEG), polysulfones (PSU), polyvinyl chloride (PVC), styrene-acrylonitrile copolymer (SAN ), Styrene-acrylonitrile / styrene-methacrylic acid methyl ester copolymer (SAN / SMMA), styrene-butadiene copolymers (SBC).

The first component and / or the second component are preferably made of one or more of the following polymer materials in partially crystalline thermoplastic modification: polyether ketone ketones (PEKK), polyether ether ketones (PEEK), liquid crystal polymers (LCP), polyamides (PA), polybutylene terephthalates (PBT), polyethylene (PE), Polyethylene terephthalate (PET), polymethylpentane (PMP), polyoxymethylene (POM), polypropylene (PP), polyphenylene sulfide (PPS), thermoplastic-elastic polyolefine (TEO), ultra-high molecular weight polyethylene (UHMWPE).

The first functional layer is preferably made of a film material. In particular, the second functional layer is made of a film material.

By using film material, a thickness of the first functional layer and a thickness of the second functional layer can preferably be set. A uniform thickness of the functional layers - also towards an edge of the first or second component - can be formed.

A thickness of the film material is particularly preferably approximately 25 μm to approximately 100 μm.

For example, the first functional layer and the second functional layer are made from a tape material.

The use of the first functional layer and / or the second functional layer in the form of a film material can offer the advantage that they can be rolled up and / or unrolled and applied in an optimized manner to the surface area of the first component or the surface area of the second component.

As an alternative to producing the first functional layer and / or the second functional layer from a film material, it can be provided that the first functional layer and / or the second functional layer are and / or are produced from a filament, for example in a 3D printing process. This will be discussed in more detail below.

It can be advantageous if the heating device is a laser source.

According to a preferred embodiment, it can be provided that the first functional layer is melted on by means of a laser beam, preferably by means of a laser beam in the infrared range, in particular locally, and is thus fixed on the first component.

The first functional layer is preferably firmly bonded to the first component by means of exposure to a laser beam.

The laser beam is preferably applied by the heating device or a further heating device.

The second functional layer is preferably melted by means of exposure to a laser beam, in particular by means of exposure to a laser beam in the infrared range, in particular locally, and is thus fixed on the second component.

The second functional layer is preferably firmly bonded to the second component by means of exposure to a laser beam.

The laser beam is preferably applied by the heating device or a further heating device.

According to a preferred embodiment, the laser source generates a laser beam in a wavelength range from approximately 900 nm to approximately 1100 nm, for example at approximately 1000 nm.

By melting the first and / or second functional layer by means of the laser beam, contactless heating of the first amorphous thermoplastic material and / or the second amorphous thermoplastic material can be realized.

It can be provided that a power of the laser beam application is controlled and / or regulated by means of a control and / or regulating device.

The control and / or regulating device is preferably a component of the heating device or a further heating device.

The control and / or regulating device preferably comprises a temperature sensor device for measuring a temperature of the first functional layer and / or the second functional layer. The temperature sensor device is in particular a thermal camera.

It can be provided that the thermal camera is focused on an area of the first functional layer or the second functional layer which is melted.

The control and / or regulating device regulates the power of the laser beam application depending on the signal from the thermal camera.

It can be favorable if the first functional layer is first applied to the surface area of the first component before the second functional layer is applied to the surface area of the second component, or vice versa. The same apparatus can thus be used to apply the functional layers.

According to a preferred variant, the first functional layer and / or the second functional layer are applied by applying tape, in particular by means of a tape layer.

The tape-laying device is preferably a device for automatic tape-laying, by means of which a film material is unrolled on a surface area of a substrate and is firmly connected to the surface area of the substrate. The tape layer comprises one or more robot arms, the sections of which can be rotated in multiple axes. In the present case, the first component and / or the second component serve as the substrate.

The tape layer can be used to achieve a laying speed in a range of approximately 6 meters of film material per minute (m / min) to approximately 16 meters of film material per minute (m / min), in particular 7 meters of film material per minute (m / min) become. The laying speed depends on the selection of the film material and its thickness. The first functional layer and / or the second functional layer are here formed by the respective film material.

The comparatively high depositing speed enables the functional layers to be applied particularly quickly.

According to an alternative embodiment for application by tape laying, it can be provided that the first functional layer is applied additively to the first component by means of a 3D printing device in a 3D printing process. In particular, the second functional layer is applied additively to the second component by means of a 3D printing device in a 3D printing process.

A filament-based 3D printing process is particularly preferably used.

The 3D printing device preferably comprises a heating device, by means of which the material to be applied is melted before it is applied in flowable form to the surface area to be printed on the first component and / or the second component in accordance with a printing grid.

In the case of powder-based 3D printing processes - which are also suitable for applying functional layers - the material to be applied is applied in powder form.

The first component is preferably formed from a partially crystalline thermoplastic material.

In particular, the second component is formed from a partially crystalline thermoplastic material.

The first component and / or the second component are preferably components made of fiber-reinforced plastics or polymer matrix composites.

Glass fibers and / or carbon fibers are preferably used as fibers. According to a further preferred embodiment, in addition to or as an alternative to glass fibers and / or carbon fibers, aramid fibers are used in the material of the first component and / or second component. Metal fibers are also suitable in addition or as an alternative to the fiber types mentioned for use in the material of the first component and / or second component.

The first component and / or the second component preferably also remain partially crystalline during the joining.

In the case of partially crystalline thermoplastic materials, macromolecules of the materials are arranged in areas parallel to one another. When a polymer melt solidifies, an at least partial order of molecular chains is formed. Crystallization nuclei form.

Then, starting from the crystallization nuclei, polymer chains attach to one another and form so-called crystallites, which have a state of order. Typically the crystallites have a size in a range from 15 nm to 100 nm in one dimension. If the crystallites continue to grow, so-called lamellae form. Superstructures such as spherulites are then created from several lamellae. The polymer chains of the macromolecules can also have lateral branches.

A degree of crystallinity is preferably approximately 20% to approximately 80% based on a total volume of the partially crystalline thermoplastic material.

In order to mechanically reinforce the joining area, it can be provided that the first amorphous thermoplastic material of the first functional layer comprises fibers.

In addition and as an alternative, it can be provided that the second amorphous thermoplastic material of the second functional layer comprises fibers.

The fibers in the material of the first functional layer and / or second functional layer are preferably selected from one or more of the following fiber types: glass fibers, carbon fibers, metal fibers, aramid fibers.

The fibers can be present as short fibers or long fibers.

This leads to a thermoplastic joint with improved mechanical properties.

The method is preferably carried out in such a way that the first amorphous thermoplastic material of the first functional layer and / or the second amorphous thermoplastic material of the second functional layer remain amorphous thermoplastic during the entire method.

Because mixing of the functional layers with the materials of the first and / or second component is avoided, amorphous solidification of the first functional layer and / or the second functional layer is promoted. The first amorphous thermoplastic material and / or the second amorphous thermoplastic material can remain amorphous thermoplastic, inter alia because of the processing temperature and processing time. A homogeneous joint can be formed.

According to a preferred embodiment, the first component and the second component are connected to one another in the joining area by welding.

During welding, the first and second functional layers are heated until the respective material reaches a welding temperature and are welded to one another in the joining area under the effect of a force through solidification of the melt, through diffusion or in the solid phase. Melting can take place by different mechanisms and started by different energy sources.

Induction welding, resistance welding, ultrasonic welding, laser beam welding and vibration welding have proven to be preferred welding processes. However, other welding methods can also be used to produce the joint.

With induction welding, the energy required for welding is brought into the joint area without contact and comparatively quickly by means of an alternating electromagnetic field.

During resistance welding, an electric current flows through the joint area and the different materials are melted as a result.

In ultrasonic welding, a high-frequency alternating current is generated with the help of a generator and this is transmitted via a coaxial cable to an ultrasonic transducer, which uses the piezoelectric or magnetostrictive effect to generate a mechanical ultrasonic oscillation. These vibrations are transmitted to a sonotrode via an amplitude transformation piece. The vibrations are transmitted to the joining area under pressure via a structured, often corrugated, working surface of the sonotrode. Ultrasonic welding is carried out in accordance with EN ISO 4063: Process 41 carried out.

In laser beam welding, the energy required for the permanent connection of the first component and the second component is provided by the application of a laser beam.

In vibration welding, a distinction can be made between two variants, linear vibration welding and orbital vibration welding. Depending on the variant, the parts to be joined - here the first and the second component - are set in different vibrations. In both variants, the parts to be joined are pressed against one another and rubbed against one another by vibration. Oscillating movements heat the first and the second component at least in the joining area and lead to a plasticization of the joining area. After a short cooling down, a permanent bond develops. According to the linear variant, vibration energy can be provided with infrared preheating. Vibration welding can be carried out with comparatively short process times.

It can be provided that an additional welding layer is used to connect the first component and the second component. The welding filler layer is formed from a third amorphous thermoplastic material and is arranged between the first functional layer and the second functional layer before the first component and the second component are connected to one another.

The third amorphous thermoplastic material preferably comprises fibers. The fibers are preferably selected from one or more of the following fiber types: glass fibers, carbon fibers, metal fibers, aramid fibers.

The fibers can be present as short fibers or long fibers.

For an optimized joint connection, it can be advantageous if the first amorphous thermoplastic material of the first functional layer is weld-compatible with the thermoplastic material of the first component.

In addition or as an alternative, the second amorphous thermoplastic material of the second functional layer is weld-compatible with the thermoplastic material of the second component.

Additionally or alternatively, the first amorphous thermoplastic material of the first functional layer is weld-compatible with the second amorphous thermoplastic material of the second functional layer.

In addition or as an alternative, the first amorphous thermoplastic material of the first functional layer, the third amorphous thermoplastic material of the additional welding layer and the second amorphous thermoplastic material of the second functional layer are weld-compatible.

The aforementioned elements are compatible with welding if they are made from the same polymer materials, possibly with different modifications - amorphous thermoplastic and partially crystalline.

Materials characterized as being weldable can be welded to one another. Their melting temperatures are preferably in a common range and in particular differ from one another by less than 100.degree.

Material combinations that are compatible with welding are preferably taken from the textbook Engineering Design with Polymers and Composites, by JC Gerdeen et al., Second edition, 2011, Taylor & Francis publisher , known. Reference is hereby made expressly and in full to the welding compatibilities published in the textbook mentioned.

For vibration welding, for example, the following material combinations for amorphous thermoplastic materials are compatible with welding: PEKK and PEKK, PEEK and PEEK, PEKK and PEEK, ABS and ABS / PC, ABS and PC, ABS and PEI, ABS and PMMA, ABS and PPO, ABS and PS, ABS and PVC, ABS and SAN, ABS and SBC, ABS / PC and PC, ABS / PC and PMMA, HIPS and PS, HIPS and SAN, HIPS and SBC, PC and PC / PBT, PC and PEI, PC and PMMA, PC and PPO, PC and PSU, PC / PBT and ABS / PC, PC / PBT and PMMA, PES and PSU, PMMA and SAN, PMMA and SBC, PEO and PPO, PPO and PC, PPO and PS, PPO and SAN, PS and SAN, PS and SBC, PSU and PES, PPO and SAN.

Materials that are linked by a slash are copolymers.

For example, the following material combinations for amorphous thermoplastic materials are weld-compatible for ultrasonic welding: PEKK and PEKK, PEEK and PEEK, PEKK and PEEK, ABS and ABS / PC, PC and ABS / PC, PC / PBT and ABS / PC, PC / PBT and PC, PEI and PC, PMMA and ABS, PMMA and ABS / PC, PMMA and PC, PPO and PC / PBT, PPO and PMMA, PSU and PC / PBT, PVC and ABS, SAN and ABS, SAN and HIPS, SAN and PMMA, SAN and PPO, SBC and ABS, SBC and HIPS, SBC and PS.

For example, the following material combinations are compatible with welding for induction welding: PEKK and PEKK, PEEK and PEEK, PEKK and PEEK, ABS / PC and ABS, PC and ABS / PC, PC and PBT, PC / PET and ABS / PC, PC / PET and PC, PMMA and ABS, PMMA and ABS / PC, PMMA and PC, PMMA and PBT, PS and ABS, PS and PPO, SAN / ABS and ABS, SAN / SMMA and PMMA, SAN / SMMA and PPO, SAN / SMMA and PS, SBC and ABS, SBC and PMMA, SBC and PS.

For vibration welding, for example, the following material combinations of an amorphous thermoplastic material (each mentioned first) and a semi-crystalline thermoplastic material (each mentioned second) are weld-compatible: PEKK and PEKK, PEEK and PEEK, PEKK and PEEK, ABS and PBT, ABS and PET, ABS / PC and POM, PC and PBT, PC and PET, PC / PBT and PBT, PEI and PBT, PEI and PET.

For example, the following material combination of an amorphous thermoplastic material (mentioned first) and a semi-crystalline thermoplastic material (mentioned second) is weld-compatible for ultrasonic welding: PC / PBT and PBT.

The first amorphous thermoplastic material and the second amorphous thermoplastic material are preferably composed of one of the aforementioned weld-compatible material combinations. Particularly preferred for applications in the aerospace industry is the formation of the first functional layer and the second functional layer each from PEKK or PEEK.

In particular, the first amorphous thermoplastic material, the second amorphous thermoplastic material and the third amorphous thermoplastic material are composed of one of the aforementioned material combinations. Two of the named elements are made of the same material. For example, the first amorphous thermoplastic material and the second amorphous thermoplastic material is identical and the third amorphous thermoplastic material is made of a material that is weldable with this material.

It is particularly preferred for applications in the aerospace industry if the welding filler layer - like the first and second functional layers - is made of PEKK or PEEK.

The first component and the second component are preferably formed from one of the aforementioned weld-compatible material combinations. In aerospace applications, the first component and the second component are preferably formed from PEKK or PEEK.

After the first component and the second component have been connected in the joint area, the resulting joint can be tempered. In this way, the strength of the connection can be increased. Post-crystallization of the material in the joining area is preferably carried out as a result of the tempering.

• - Abtragen eines Bereichs an und/oder in dem ersten Bauteil, wodurch ein Oberflächenbereich entsteht;
• - additives Aufbringen einer ersten Funktionsschicht aus einem ersten amorphen thermoplastischen Material auf den Oberflächenbereich des ersten Bauteils; und
• - Verbinden des ersten Bauteils und eines zweiten Bauteils, auf welches eine zweite Funktionsschicht aus einem zweiten amorphen thermoplastischen Material aufgebracht wurde, wobei das erste Bauteil und das zweite Bauteil nach einem erfindungsgemäßen Verfahren zur Herstellung einer thermoplastischen Fügeverbindung miteinander verbunden werden.

The invention also relates to a method for repairing a first component, comprising:

• - Removal of an area on and / or in the first component, whereby a surface area is created;
• additive application of a first functional layer made of a first amorphous thermoplastic material to the surface area of the first component; and
• Connecting the first component and a second component to which a second functional layer made of a second amorphous thermoplastic material has been applied, the first component and the second component being connected to one another by a method according to the invention for producing a thermoplastic joint.

The second component is preferably a component whose dimensions essentially correspond to the dimensions of the removed area in the first component.

In particular, the second component is designed to be complementary to the removed area of the first component.

The inventive method for repairing a first component preferably has one or more of the features described in connection with the inventive method for producing a thermoplastic joint and / or one or more of the advantages described in connection with the inventive method for producing a thermoplastic joint.

Material of the first component is preferably removed in a damaged area of the first component.

It can be beneficial if material is removed until an essentially flat area is created.

The first functional layer can, however, also be applied to curved areas or areas with a surface structure. This also applies to the second functional layer.

The invention further relates to a thermoplastic joint connection, comprising a first component and a second component, which are connected to one another in a joint area, the joint area being formed from an amorphous thermoplastic material.

The thermoplastic joint connection according to the invention preferably has one or more of the features described in connection with the method according to the invention and / or one or more of the advantages described in connection with the method according to the invention.

The aforementioned amorphous thermoplastic material of the joining area preferably comprises the first amorphous thermoplastic material of the first functional layer, optionally the third amorphous thermoplastic material of the welding filler layer, and the second amorphous thermoplastic material of the second functional layer.

Further preferred features and / or advantages of the invention are the subject matter of the following description and the graphic representation of exemplary embodiments.

• 1 eine schematische Darstellung einer Ausführungsform eines Verfahrens zur Herstellung einer thermoplastischen Fügeverbindung in einem Zustand vor dem Aufbringen einer ersten Funktionsschicht auf ein erstes Bauteil, wobei die erste Funktionsschicht mittels eines Tape-Legers additiv auf das erste Bauteil aufgebracht wird;
• 2 eine weitere Ausführungsform eines Verfahrens zur Herstellung einer thermoplastischen Fügeverbindung in einem Zustand während des Aufbringens der ersten Funktionsschicht auf das erste Bauteil, wobei die erste Funktionsschicht in einem 3D-Druck-verfahren auf das erste Bauteil aufgebracht wird;
• 3 eine schematische Darstellung des Verfahrens zur Herstellung einer thermoplastischen Fügeverbindung aus den 1 oder 2, wobei das erste Bauteil, auf dem die erste Funktionsschicht aufgebracht ist, mit einem zweiten Bauteil, auf dem eine zweite Funktionsschicht aufgebracht ist, verbunden wird;
• 4 eine schematische Darstellung einer Ausführungsform einer thermoplastischen Fügeverbindung aus einem ersten Bauteil und einem zweiten Bauteil in einem Zustand nach dem Verbinden der Bauteile;
• 5 eine Rasterelektronenmikroskopieaufnahme einer amorphen thermoplastischen Funktionsschicht vor dem Fügen eines ersten Bauteils mit dem zweiten Bauteil; und
• 6 eine schematische Darstellung einer Ausführungsform eines Reparaturverfahrens eines ersten Bauteils in einem Zustand vor einer Durchführung des Verfahrens.

In the drawings show:

• 1 a schematic representation of an embodiment of a method for producing a thermoplastic joint in a state before a first functional layer is applied to a first component, the first functional layer being applied additively to the first component by means of a tape layer;
• 2 a further embodiment of a method for producing a thermoplastic joint connection in a state during the application of the first functional layer to the first component, the first functional layer is applied to the first component in a 3D printing process;
• 3 a schematic representation of the method for producing a thermoplastic joint from the 1 or 2 wherein the first component on which the first functional layer is applied is connected to a second component on which a second functional layer is applied;
• 4th a schematic representation of an embodiment of a thermoplastic joint connection from a first component and a second component in a state after the components have been connected;
• 5 a scanning electron microscope image of an amorphous thermoplastic functional layer prior to joining a first component to the second component; and
• 6th a schematic representation of an embodiment of a repair method for a first component in a state before the method is carried out.

Identical or functionally equivalent elements are provided with the same reference symbols in all figures.

Various embodiments of a method for producing a joint connection 125 between a first component 100 and a second component 102 are in 1 based on the first component 100 shown. It is a state of the first component 100 before a first functional layer 104 on the first component 100 is applied, shown.

The second component 102 (comparison 3 and 4th ) is in 1 not shown. All statements regarding the first component 100 and the first functional layer 104 apply to the second component 102 and a second functional layer 126 equally.

The first component 100 and the second component 102 can be used, for example, in the aerospace or automotive sectors.

The first component 100 is formed in one embodiment from polyether ketone ketone (PEKK), in which carbon fibers are embedded. It is a partially crystalline thermoplastic material.

As an alternative to PEKK, other partially crystalline thermoplastic materials with or without embedded fibers can also be used as the material for the first component 100 be used.

For example, as an alternative to PEKK or as a mixture with it, one or more of the following polymer materials in partially crystalline modification are suitable: Polyetheretherketones (PEEK), liquid crystal polymers (LCP), polyamides (PA), polybutylene terephthalates (PBT), polyethylene (PE), polyetheretherketones (PEEK), Polyethylene terephthalate (PET), polymethylpentane (PMP), polyoxymethylene (POM), polypropylene (PP), polyphenylene sulfide (PPS), thermoplastic-elastic polyolefine (TEO), ultra-high molecular weight polyethylene (UHMWPE).

The second component 102 (comparison 3 and 4th ) is preferably made of one or more of the following polymers in partially crystalline modification: polyether ketone ketones (PEKK), polyether ether ketones (PEEK), liquid crystal polymers (LCP), polyamides (PA), polybutylene terephthalates (PBT), polyethylene (PE), polyether ether ketones (PEEK), polyethylene terephthalates (PET), polymethylpentane (PMP), polyoxymethylene (POM), polypropylene (PP), polyphenylene sulfide (PPS), thermoplastic-elastic polyolefins (TEO), ultra-high molecular weight polyethylene (UHMWPE).

The first component 100 and the second component 102 are presently made of the same partially crystalline thermoplastic material - namely PEKK with carbon fibers.

The first component 100 is shown schematically cuboid for reasons of illustration. A shape of the first component 100 however, may vary depending on the application.

After providing the first component 100 becomes the first functional layer 104 on a surface area 106a of the first component 100 upset.

The first functional layer 104 is formed from a first amorphous thermoplastic material.

As the first amorphous thermoplastic material, for example, one or more of the following thermoplastic polymer materials in amorphous modification are suitable: polyether ketone ketones (PEKK), polyether ether ketones (PEEK), acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-butadiene-styrene-polycarbonate copolymers ( ABS / PC), acrylonitrile-styrene-acrylate copolymers (ASA), polystyrenes (PS), especially high-impact polystyrenes (HIPS), polycarbonates (PC), polycarbonate-polybutylene terephthalate copolymers (PC / PBT), polyethyleneimines (PEI), polyether sulfones (PES), polymethyl methacrylate (PMMA), polyethylene oxide (PEO), polyphenylene ether (PPE), polyethylene glycol (PEG), polysulfone (PSU), polyvinyl chloride (PVC), Styrene-acrylonitrile copolymer (SAN), styrene-acrylonitrile / styrene-methacrylic acid methyl ester copolymer (SAN / SMMA), styrene-butadiene copolymers (SBC).

The second amorphous thermoplastic material of the second functional layer 126 is preferably made of one or more of the following polymer materials: polyether ketone ketone (PEKK), polyether ether ketone (PEEK), acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-butadiene-styrene-polycarbonate copolymers, acrylonitrile-styrene-acrylate copolymers (ASA ), Polystyrenes (PS), especially high-impact polystyrenes (HIPS), polycarbonates (PC), polycarbonate-polybutylene terephthalate copolymers (PC / PBT), polyethyleneimines (PEI), polyethersulfones (PES), polymethyl methacrylate (PMMA), polyethylene oxides (PEO), Polyphenylene ether (PPE), polyethylene glycols (PEG), polysulfones (PSU), polyvinyl chloride (PVC), styrene-acrylonitrile copolymer (SAN), styrene-acrylonitrile / styrene-methacrylic acid methyl ester copolymer (SAN / SMMA), styrene-butadiene copolymers ( SBC).

The present is the first functional layer 104 and the second functional layer 126 made of the same amorphous thermoplastic material.

The first functional layer 104 and the second functional layer 126 are made of PEKK.

The first functional layer 104 is present as a film material 108 provided. The foil material 108 is wound on a roll and is used for application to the surface area 106a of the first component 100 along the surface area 106a unrolled.

A tape layer is used here for rolling 110 used, by means of which an automatic application of the first functional layer 104 on the first component 100 can be carried out. Alternatively, the film material 108 also by means of other automated methods or manually on the surface area 106a of the first component 100 to be unrolled.

The first functional layer 104 and the broad functional layer 126 in the present case each have a thickness in a range from approximately 25 μm to approximately 100 μm.

The tape layer 110 includes a robotic arm 112 , which by pivoting about two axes of rotation arranged parallel to one another over the surface area 106 of the first component 100 is moved.

A speed of laid sheet material 108 per time, i.e. the depositing speed, is in a range from approx. 6 m / min to approx. 16 m / min. For example, the laying speed is approximately 7 m / min.

While the first functional layer is being rolled off 104 becomes the first functional layer 104 by means of a heating device 114 immediately prior to being deposited on the surface area 106a locally melted.

The heating device 114 is in the present case a laser source 116 . The laser source 116 serves to apply a laser beam 118 . The laser beam exposure 118 is to a position on the surface area 106 of the first component focused on which the first functional layer 104 is deposited (deposit position). This creates a so-called joint gap.

The laser beam exposure 118 is in 1 indicated schematically by a dashed line.

The present case is for the application of the laser beam 118 a laser beam in the infrared range with a wavelength of around 1000 nm is used.

The heating device 114 furthermore comprises a control and / or regulating device 120 for controlling and / or regulating a power of the laser beam application 118 .

The control and / or regulating device 120 includes a PID (proportional-integral-derivative) controller.

A protective gas atmosphere is not necessary during tape laying. In the case of oxygen-sensitive polymer materials, however, the tape-laying can also be carried out under a protective gas atmosphere.

The control and / or regulating device 120 includes a thermal camera 122 whose focus is on the placement position of the first functional layer 104 on the surface area 106a is directed so that the laser power depends on a temperature of the first functional layer 104 can be controlled and / or regulated.

The temperature of the first functional layer drops 104 below a processing temperature at which the functional layer 104 Can be melted, the power of the laser beam is applied 118 by means of the control and / or regulating device 120 elevated.

The temperature of the first functional layer increases 104 the processing temperature, the power of the laser beam exposure 118 by means of the control and / or regulating device 120 reduced.

By melting the first thermoplastic material of the first functional layer 104 on the surface area 106a of the first component 100 becomes the first functional layer 104 cohesively with the surface area 106a of the first component 100 connected.

The first functional layer is used for melting 104 - as already mentioned - heated to the processing temperature. In the present case - in the case of PEKK - the processing temperature is in a range from around 300 ° C to around 350 ° C, in particular in a range from around 310 ° C to around 330 ° C. The processing temperature is lower than a melting temperature of the partially crystalline thermoplastic material of the first component 100 (here carbon fiber reinforced PEKK).

When the first functional layer cools down 104 the first functional layer hardens to room temperature (approx. 25 ° C) 104 off, remaining amorphous thermoplastic throughout the application process.

The material of the first part 100 remains of the first functional layer during the entire application process 104 partially crystalline thermoplastic.

The material of the first part 100 and the first amorphous thermoplastic material of the first functional layer 104 are made of materials that are compatible with welding.

In embodiments in which the first component 100 and the first functional layer 104 and are the same polymer material in different modifications - as in the present case from PEKK - these materials are compatible with welding. Alternatively, the different elements can also be made of different weldable materials. This will be discussed in more detail below.

To reinforce a joining area 124 (Comparison 4th ), in which the first functional layer 104 and the second functional layer 126 are connected to one another, comprises the first amorphous thermoplastic material of the first functional layer 104 Fibers, in this case glass fibers. In addition or as an alternative, carbon fibers, metal fibers and / or aramid fibers are also suitable.

Laser beams from the laser source can be improved with carbon fibers of the first amorphous thermoplastic material of the first functional layer 104 couple, whereby the melting of the first functional layer 104 can be optimized.

For an induction welding process, layers made of amorphous thermoplastic materials with metal fibers are used as functional layers 104 , 126 particularly well suited.

The first functional layer is created by applying the tape as described above 104 additive to a surface area 106 of the first component 100 upset.

Then, as before, the application of the first functional layer is exemplified 104 on the first component 100 described a second functional layer 126 on the second component 102 upset.

The explanations regarding the material of the first component 100 apply - if not for the second component anyway 102 described - for the material of the second component 102 equally.

The statements relating to the first amorphous thermoplastic material of the first functional layer 104 apply - provided they do not apply to the second functional layer anyway 126 described - for the second amorphous thermoplastic material of the second functional layer 126 equally.

Another embodiment of a method for joining a first component 100 with a second component 102 is in 2 shown.

The further embodiment of the method essentially differs from that in FIG 1 illustrated embodiment that the first functional layer 104 by means of a 3D printing device 130 in a 3D printing process on the surface area 106a of the first component 100 is applied.

An application element is used for this 132 the 3D printing device 130 over the surface area 106a of the first component 100 moved over a tip of the application element 132 the first amorphous thermoplastic material in a flowable state on the surface area 106a of the first component 100 is applied. The applied material cools down and hardens to form the first functional layer 104 out.

For example, an FFF process (fused filament fabrication process) is used to produce the first functional layer 104 utilized. In this process, a filament made from the first amorphous thermoplastic material is heated by an extruder and then onto the surface area 106a of the first component 100 applied.

The 3-D printing device comprises the heating of a surface on which printing is being carried out and / or for melting the filament 130 a heater 114 .

The application element 132 is preferably part of a housing of the 3D printing device 130 enclosed and within the housing the 3D printing process is carried out.

It can be provided that the surface area 106a of the first component 100 is heated to carry out the 3D printing process (not shown). A movement of the application element 132 over the surface area 106a of the first component 100 is preferably by means of a control and / or regulating device 134 the 3D printing device 130 controlled and / or regulated. The control and / or regulating device is used to control and / or regulate a movement of the application element 132 and a flow rate of flowable first amorphous thermoplastic material.

Also an achievement of the heating device 114 is by the control and / or regulating device 134 regulated.

Incidentally, the in 2 Another embodiment shown with the in 1 embodiment shown, so that reference is made to the description thereof.

After one of the in the 1 and 2 illustrated embodiments the first functional layer 104 on the first component 100 was applied and the second functional layer 126 on the second component 102 will be the first component 100 and the second component 102 present permanently connected to each other. This is in 3 shown schematically.

The first component is used to connect 100 and the second component 102 welded together. For welding the first component 100 and the second component 102 is presently a welding device 135 used which in 3 is shown schematically.

By means of the welding device 135 a sufficiently large amount of energy is put into the first functional layer 104 and the second functional layer 126 introduced so that they are in the joint area 124 directly or via a weld filler layer 136 , for example a welding filler foil, are connected to one another.

The welding device 135 be designed as an induction welding device, a resistance welding device, an ultrasonic welding device, a vibration welding device or a laser beam welding device.

The weld filler layer 136 is made of a third amorphous thermoplastic material, which is combined with the first amorphous thermoplastic material of the first functional layer 104 and the second amorphous thermoplastic material of the second functional layer 126 is welding compatible. The third amorphous thermoplastic material can comprise fibers in the form of glass fibers and / or carbon fibers and / or metal fibers and / or aramid fibers.

The welding of the first component 100 and the second component 102 via the first functional layer 104 and the second functional layer 126 , and optionally the welding filler layer 136 , can be done by induction welding, ultrasonic welding, resistance welding, vibration welding, or laser beam welding.

As in connection with 1 materials of the first functional layer are mentioned 104 , the first component 100 , the second functional layer 126 and the second component selected to be weld compatible.

As an alternative to being made from the same polymer material in different modifications, it can be provided that the first functional layer 104 and the first component 100 , or the second functional layer 126 and the second component 102 , in the case of vibration welding, are made of materials according to one of the following material combinations: PEEK and PEEK, PEKK and PEEK, ABS and PBT, ABS and PET, ABS / PC and POM, PC and PBT, PC and PET, PC / PBT and PBT, PEI and PBT, PEI and PET.

In the case of ultrasonic welding, the first functional layer 104 made of PC / PBT and the first component 100 be made of PBT. The second functional layer 126 can also be PC / PBT and the second component 102 made of PBT.

The first functional layer 104 and the second functional layer 126 are, in the case of ultrasonic welding, an alternative to PEKK training from one of the following material combinations: PEEK and PEEK, PEKK and PEEK, ABS and ABS / PC, PC and ABS / PC, PC / PBT and ABS / PC, PC / PBT and PC , PEI and PC, PMMA and ABS, PMMA and ABS / PC, PMMA and PC, PPO and PC / PBT, PPO and PMMA, PSU and PC / PBT, PVC and ABS, SAN and ABS, SAN and HIPS, SAN and PMMA , SAN and PPO, SBC and ABS, SBC and HIPS, SBC and PS.

• PEKK und PEKK, PEEK und PEEK, PEKK und PEEK, ABS und ABS/PC, ABS und PC, ABS und PEI, ABS und PMMA, ABS und PPO, ABS und PS, ABS und PVC, ABS und SAN, ABS und SBC, ABS/PC und PC, ABS/PC und PMMA, HIPS und PS, HIPS und SAN, HIPS und SBC, PC und PC/PBT, und PC und PEI, PC und PMMA, PC und PPO, PC und PSU, PC/PBT und ABS/PC, PC/PBT und PMMA, PES und PSU, PMMA und SAN, PMMA und SBC, PEO und PPO, PPO und PC, PPO und PS, PPO und SAN, PS und SAN, PS und SBC, PSU und PES, PPO und SAN.

In the case of vibration welding, the first functional layer 104 and the second Functional layer 126 also consist of one of the following material combinations:

• PEKK and PEKK, PEEK and PEEK, PEKK and PEEK, ABS and ABS / PC, ABS and PC, ABS and PEI, ABS and PMMA, ABS and PPO, ABS and PS, ABS and PVC, ABS and SAN, ABS and SBC, ABS / PC and PC, ABS / PC and PMMA, HIPS and PS, HIPS and SAN, HIPS and SBC, PC and PC / PBT, and PC and PEI, PC and PMMA, PC and PPO, PC and PSU, PC / PBT and ABS / PC, PC / PBT and PMMA, PES and PSU, PMMA and SAN, PMMA and SBC, PEO and PPO, PPO and PC, PPO and PS, PPO and SAN, PS and SAN, PS and SBC, PSU and PES , PPO and SAN.

In the case of induction welding, the following material combinations are compatible with welding: PEKK and PEKK, PEEK and PEEK, PEKK and PEEK, ABS / PC and ABS, PC and ABS / PC, PC and PBT, PC / PET and ABS / PC, PC / PET and PC , PMMA and ABS, PMMA and ABS / PC, PMMA and PC, PMMA and PBT, PS and ABS, PS and PPO, SAN / ABS and ABS, SAN / SMMA and PMMA, SAN / SMMA and PPO, SAN / SMMA and PS , SBC and ABS, SBC and PMMA, SBC and PS.

Also the material of the welding filler foil 136 If available, it is selected so that it is weld-compatible with the materials of the first functional layer 104 and the second functional layer 126 is.

The joint connection 125 after connecting the first component 100 and the second component 102 is in 4th shown. Perpendicular to a longitudinal center plane of the joining area 124 are in the joining area 124 the first functional layer 104 , optionally the welding filler layer 136 and the second functional layer 126 arranged one above the other. Boundaries between each layer are in 4th only shown for reasons of illustration.

After joining, there are transitions between the first functional layer 104 , the welding filler foil 136 - if used - and the second functional layer 126 Scanning electron microscopy can no longer be distinguished.

In 5 a picture is shown which was taken with a scanning electron microscope. A secondary electron detector was used. In the picture there is a transition from the first functional layer 104 on the first component 100 shown. The receptacle is in a receiving direction parallel to a longitudinal center plane of the first functional layer 104 recorded.

As indicated schematically, the first functional layer has 104 a theoretical thickness of approx. 100 µm, whereby the present image shows a thickness of approx. 40 µm.

It is clear that at least the upper area of the first functional layer 104 is thermoplastic amorphous.

It can be seen from the scanning electron microscope image that - in contrast to material transitions within the joining area 124 - a clear boundary between the first amorphous thermoplastic material of the first functional layer 104 and the partially crystalline thermoplastic material of the first component 100 during the cohesive application of the first functional layer 104 on the surface area 106a of the first component 100 preserved.

One embodiment of a repair method for repairing a first component 100 is in 6th shown schematically. A state before the repair method is carried out is shown.

In the 6th The embodiment of the method shown here differs essentially from that in FIG 1 illustrated embodiment of a method for producing a thermoplastic joint connection that the first component 100 a damaged area 140 having.

The first component 100 will be in the damaged area 140 machined by machining. The damaged area 140 is smoothed to a substantially flat surface area 106c originated.

Then - as in connection with the 1 to 4th described - a first functional layer 104 applied additively and this with a second functional layer 126 , which on a second component 102 was applied, in a joint area 126 connected.

One of the first component 100 facing shape of the second component 102 corresponds essentially to a shape of the surface area 106c of the first component 100 .

The functional layers 104 , 126 can be done by laying tape (compare 1 ) or by a 3D printing process (compare 2 ) on the surface area 106c be applied.

Dimensions of the second component 102 correspond to one in the damaged area in the repair procedure 140 removed volume of the first component 100 .

List of reference symbols

100

first component

102

second component

104

first functional layer

106a

Surface area

106b

Surface area

106c

Surface area

108

Foil material

110

Tape-Layers

112

Robotic arm

114

Heating device

116

Laser source

118

Laser beam exposure

120

Control and / or regulating device

122

Thermal camera

124

Joining area

125

Joint connection

126

second functional layer

130

3D printing device

132

Application element

134

Control and / or regulating device

135

Welding device

136

Welding filler layer

140

damaged area

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Non-patent literature cited

• Engineering Design with Polymers and Composites, by J.C. Gerdeen et al., Second edition, 2011, Verlag Taylor & Francis [0108]

Claims (15)

A method for producing a thermoplastic joint connection (125) between a first component (100) and a second component (102), comprising: - Additive application of a first functional layer (104) made of a first amorphous thermoplastic material to a surface area (106a) of a first component (100), the first component (100) being made from a thermoplastic material and the first amorphous thermoplastic material during the Application remains amorphous thermoplastic; - Additive application of a second functional layer (126) made of a second amorphous thermoplastic material to a surface area (106b) of a second component (102), wherein the second component (102) is made of a thermoplastic material and wherein the second amorphous thermoplastic material during the Application remains amorphous thermoplastic; and - Connecting the first component (100) and the second component (102) in a joining area (124) by means of the first functional layer (104) and the second functional layer (126). Procedure according to Claim 1 , characterized in that the first functional layer (104) is melted locally before being applied to the surface area (106a) of the first component (100) and / or that the second functional layer (126) is melted locally before being applied to the surface area (106b) of the second Component (102) is melted locally. Procedure according to Claim 1 or 2 , characterized in that the first functional layer (104) is materially connected to the first component (100) and / or that the second functional layer (126) is materially connected to the second component (102). Method according to one of the preceding claims, characterized in that the first functional layer (104) is heated to a first processing temperature by means of a heating device (114) and that the second functional layer (126) is heated by means of the heating device (114) or a further heating device (114) is heated to a second processing temperature, the first processing temperature being lower than a melting temperature of the thermoplastic material of the first component (100) and wherein the second processing temperature is lower than a melting temperature of the thermoplastic material of the second component (102). Method according to one of the preceding claims, characterized in that the first functional layer (104) and / or the second functional layer (126) are made of a film material (108) or that the first functional layer (104) and / or the second functional layer (126) are made from a filament, for example in a 3D printing process. Method according to one of the preceding claims, characterized in that the first functional layer (104) is melted by means of laser beam application (118), preferably by means of laser beam application (118) in the infrared range, in particular locally, and is thus fixed to the first component (100) and / or that the second functional layer (126) is melted by means of laser beam application (118), preferably by means of laser beam application (118) in the infrared range, in particular locally, and is thus fixed on the second component (102). Procedure according to Claim 6 , characterized in that a power of the laser beam application (118) is controlled and / or regulated by means of a control and / or regulating device (120) and that the control and / or regulating device (120) is a temperature sensor device for measuring a temperature of the first functional layer (104) and / or the second functional layer (126), wherein the temperature sensor device is in particular a thermal camera (122). Method according to one of the preceding claims, characterized in that the first functional layer (104) is applied additively to the first component (100) by tape laying or by means of a 3D printing device (130) in a 3D printing process and / or that the second functional layer (126) is applied additively to the second component (102) by tape laying or by means of a 3D printing device (130) in a 3D printing process. Method according to one of the preceding claims, characterized in that the first component (100) and / or the second component (102) are formed from a partially crystalline thermoplastic material. Method according to one of the preceding claims, characterized in that the first amorphous thermoplastic material of the first functional layer (104) comprises fibers and / or that the second amorphous thermoplastic material of the second functional layer (126) comprises fibers, the fibers being selected in particular from one or more of the following fiber types: glass fibers, carbon fibers, metal fibers, aramid fibers. Method according to one of the preceding claims, characterized in that the method is carried out in such a way that the first amorphous thermoplastic material of the first functional layer (104) and the second amorphous thermoplastic material of the second functional layer (126) during the entire method for producing a joint ( 125) remain amorphous thermoplastic. Method according to one of the preceding claims, characterized in that an additional welding layer (136) is used to connect the first component (100) and the second component (104), which is formed from a third amorphous thermoplastic material and which is between the first functional layer ( 104) and the second functional layer (126) is arranged before the first component (100) and the second component (102) are connected to one another in the joining area (124). Method according to one of the preceding claims, characterized by at least one of the following: - the first amorphous thermoplastic material of the first functional layer (104) and the second amorphous thermoplastic material of the second functional layer (126) are weld-compatible; - The first amorphous thermoplastic material of the first functional layer (104) and the thermoplastic material of the first component (100) are compatible with welding; - the second amorphous thermoplastic material of the second functional layer (126) and the thermoplastic material of the second component (102) are compatible with welding; - The first amorphous thermoplastic material of the first functional layer (104), a third amorphous thermoplastic material of a welding filler layer (136) and the second amorphous thermoplastic material of the second functional layer (126) are compatible with welding. Method for repairing a first component (100), comprising: - removing an area (140) on the first component, whereby a surface area (106c) is produced; - additive application of a first functional layer (104) made of a first amorphous thermoplastic material to the surface area (106c) of the first component (100); and joining the first component (100) and a second component (102), to which a second functional layer (126) made of a second amorphous thermoplastic material has been applied, by a method according to one of the Claims 1 to 13 . Thermoplastic joining connection (125), comprising a first component (100) and a second component (102), which are connected to one another in a joining area (124), the joining area (124) being formed from an amorphous thermoplastic material.

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