DE102016212622A1 - Method for joining components - Google Patents

Abstract

In order to reduce or avoid local element formation, particularly corrosion, in a method for joining components, and to provide a permanent joint between two structural members of, for example, steel and aluminum, which is not due to the properties of a filler metal such as oxidation sensitivity or tilt is weakened for recrystallization, a method for joining components is proposed, wherein a first component (10) and a second component (12) are provided, wherein a first joining surface (11) of the first component (10) and / or a second Joining surface (13) of the second component (12) is structured by a surface treatment method, wherein the first joining surface (11) of the second joining surface (13) is arranged opposite, wherein a plastic film (20) between the first joining surface (11) and the second joining surface (13) is arranged, the two Components (10, 12) by introducing heat (W) in the plastic film (20) so that the plastic film (20) melts, are welded together, and wherein the plastic film (20) is a thermoplastic material having a glass transition temperature above 0 ° C includes.

Description

The invention relates to a method for joining components according to the preamble of patent claim 1.

In many technical disciplines, in particular in vehicle construction or in body construction, materials must be joined which, due to their highly divergent physical properties, can only be connected with welding technology to a very limited extent. For example, aluminum and steel are difficult to weld together. The steel material 22MnB5 is made even more difficult by the fact that it is provided with an aluminum-silicon layer (AlSi) as part of the corrosion protection. The final mechanical properties of the steel are adjusted by the process of press hardening. During this process, the nature of the AlSi layer is also affected. This changes its color from silvery shiny to a matt dark gray during press hardening. In this state, the layer is very porous and brittle and contributes to a further impairment of the weldability. There is a risk of tearing off the aluminum-silicon layer.

In addition to the property of the aluminum-silicon layer to become porous and brittle on press-hardened 22MnB5, thus contributing to a deterioration in weldability, the different melting temperatures between aluminum (660 ° C.) and steel (more than 1,500 ° C.) also make a compound difficult of these materials by thermal joining processes. Also, the different thermal expansion coefficients of aluminum and steel complicate the permanent stability of a joint between these materials, especially under thermal stress. As a result of these properties, resilient joining joints between sheets of these materials can not be produced.

Resistance element welding offers the possibility of connecting aluminum and steel via a joining attachment element.

In the US 2,544,355 A For example, a metal foil is described for use as a joining additive, wherein the metal foil is designed as a nickel-containing austenitic layer.

From the DE 10 2013 007 205 A1 a method for joining two components is known, wherein a film of polypropylene between the two components is arranged and welded by means of an energy beam.

When using metal foils as joining additive element in resistance element welding, there is a danger of the formation of brittle, intermetallic phases between the joining additive element and the aluminum sheet. In addition, it comes in a metallic intermediate layer to a local element formation in the form of corrosion.

Polypropylene is susceptible to oxidation and tends to recrystallize, as a result of which a filler material made of polypropylene or a joining additive made of polypropylene can be forgiven later. Such distortion of the polypropylene layer weakens the joint connection.

The invention has for its object to reduce in a method for joining components of the type mentioned the local element formation, especially corrosion, or to avoid and to provide a permanent joint connection between two components of, for example, steel and aluminum, which is not due to the properties of a Welding additive, such as an oxidation sensitivity or a tendency to post-crystallization, is weakened.

This object is achieved by providing a method for joining components, wherein a first component and a second component are provided, wherein a first joining surface of the first component and / or a second joining surface of the second component is structured with a surface treatment method, wherein the first joining surface the second joining surface is arranged opposite, wherein a plastic film between the first joining surface and the second joining surface is arranged, wherein the two components are welded together by introducing heat into the plastic film, so that the plastic film melts together, dissolved, wherein the plastic film is a thermoplastic Plastic with a glass transition temperature of over 0 ° C includes.

The glass transition temperature is the softening temperature of an amorphous polymer matrix of a polymer. The glass transition temperature is therefore not the melting temperature of a crystalline phase of a polymer. Although each polymer has a glass transition temperature, not all polymers have a melting temperature. The glass transition temperature of polypropylene (PP) is about minus 30 ° C.

The first joining surface of the first component and / or the second joining surface of the second component, which represent parts or portions of the surfaces of the components to be joined, are provided with a structure as rough as possible by a suitable method, such as sand blasting, suction blasting or laser structuring , By means of the surface processing method can also advantageously surface states, such as oxide layers or porous coatings, which would hinder a good connection, are removed.

The first component, which may be, for example, a lower plate, is preferably positioned so that the structured first joining surface is located at its upper side. The second component, for example a top sheet, is preferably positioned so that the structured joining surface is located on its underside. A plastic film, which comprises a thermoplastic material or consists of a thermoplastic material, is arranged between the first joining surface and the second joining surface, so that the structured joining surfaces lie exactly on one another and are separated only by the plastic film. By introducing heat into the components to be joined, which can be done mechanically by friction stir welding or by conductive or inductive methods, for example, and due to the thermal conductivity of the components, such as metals such as steel or aluminum, the plastic film is heated and melted. The molten plastic can then advantageously flow into the structuring of the structured first joining surface and / or the structured second joining surface, that is to say into the surface structures of the joining surfaces of the components. Upon cooling, the plastic of the plastic film hardens again and ensures a connection between the components or sheets. The plastic can preferably flow into undercuts in the surface structure of the first joining surface or the second joining surface.

The use of a thermoplastic material having a glass transition temperature above 0 ° C, on the one hand, a local element formation, such as corrosion, avoided, on the other hand have thermoplastic resins with a glass transition temperature above 0 ° C a reduced sensitivity to oxidation and a lower tendency to post-crystallization and thus a warp on.

The method has the advantage that a joint connection of different materials is possible, especially as long as their thermal conductivity allows melting of the plastic. The properties of the joint connection can be influenced by parameters such as the plastic used or the type of structuring. The connection between the first component and the second component is advantageously produced via the plastic film, the sweat tendency of the materials to be joined of the components has no influence. In addition, high-strength materials can be joined advantageously with the method. The method is with further advantage particularly suitable for use in mixed construction. The required temperatures for melting the plastic are, depending on the application, advantageously very low. This promotes resource efficiency.

Depending on the type of heat input into the plastic film, the method is also applicable to one-sided accessibility of the joint. In addition, there are advantageously no harmful emissions such as smoke, radiation or noise. With particular advantage, an improved corrosion protection or a more favorable corrosion behavior is provided, since different metals are electrochemically isolated from one another by the plastic film. In addition, advantageously, the created joint or joint connection is very well loaded on train. Depending on the embodiment of the method, the created joining position can also be loaded on peeling or can not be loaded particularly well on peeling.

By means of the method for joining components, narrow flanges can be added with particular advantage. Moreover, the method is advantageously particularly flexible, since the heat to be introduced into the plastic can be introduced by various methods.

A joining of material pairings is advantageously possible regardless of their weldability, since the materials do not come into direct contact with each other. The joint connection is achieved by the melting of the plastic film arranged between the components to be joined, for example, between the sheets to be joined.

Another advantage of the method is that the joint is unilaterally accessible for the joint connection to be created with appropriate back pressure. This is advantageous in particular in view of the fact that only a relatively small expenditure on equipment must be operated and in contrast to the known from the prior art laser welding, the joining method can also be used for hard to reach joints, especially in vehicle or body construction.

It can preferably be provided that the thermoplastic material has a glass transition temperature of more than 40 ° C., more preferably of more than 90 ° C.

By using the thermoplastic material having a glass transition temperature of more than 40 ° C. or more than 90 ° C., the joining joint created between the components is advantageously still less susceptible to oxidation and even fewer post-crystallization processes occur.

Furthermore, it is preferably provided that the thermoplastic material is not an olefinic plastic, in particular no polypropylene.

Olefinic thermoplastics are all polymers whose monomers consist only of simple hydrocarbons with double bonds. The olefinic polymers include, for example, polypropylene and polyethylene.

Polypropylene with a glass transition temperature of minus 30 ° C has a high sensitivity to oxidation and a high tendency for post-crystallization and thus warping, which adversely affects the created joint compound. By excluding the plastic polypropylene for the process can advantageously be ensured a high oxidation insensitivity and a low Nachkristallisationsneigung. By the use of non-olefinic thermoplastics thus a particularly oxidation insensitive and only slightly prone to Nachkristallisation joining compound is obtained.

Furthermore, it can preferably be provided that the thermoplastic is an amorphous thermoplastic, in particular polystyrene or polymethyl methacrylate or polyether imide or polycarbonate or amorphous polyphenylene sulfide or amorphous polyether ether ketone.

Applicant's experiments have shown that amorphous thermoplastics are particularly suitable for the method of joining components and that good adhesion results can be achieved. In particular, amorphous polyphenylene sulfide, polyetherimide and polyetheretherketone are particularly suitable for the method of joining components.

Further preferred suitable thermoplastics for the plastic film are polyethylene terephthalate or polyolefins or other less oxidation-sensitive and less hygroscopic plastics.

It may preferably be provided that the plastic film comprises a thermoplastic or consists of a thermoplastic material which is between 40 ° C and 350 ° C, preferably between 100 ° C and 250 ° C, more preferably between 150 ° C and 200 ° C, softens or melts and / or which is not sticky at room temperatures.

Furthermore, it can preferably be provided that the thermoplastic material is not very sensitive to oxidation and / or has little hygroscopicity and / or is as amorphous and / or crystallization-inhibited as possible.

Amorphous plastics shrink advantageously only slightly compared to semicrystalline plastics, so that an amorphous plastic used in the process tends to particularly low post-crystallization and thus to a particularly low distortion.

Furthermore, it can preferably be provided that the thickness of the plastic film is between 10 μm to 1 mm, more preferably between 50 μm and 200 μm, particularly preferably between 100 μm and 150 μm.

Further preferably, it can be provided that the introduction of heat into the plastic film by a mechanical method, preferably by a friction stir welding method, and / or by a method using heated rollers, and / or by an inductive method, and / or by a conductive method , and / or by an electromagnetic method, preferably by a laser method takes place.

With particular advantage, the heat can be introduced by a friction stir welding process in which the heat input into the plastic film is easily controlled easily via the rotation, the feed and the contact force of a friction stir welding device used on the first and / or the second component and / or the plastic film leaves.

A friction stir welding process for introducing heat into the plastic film is therefore particularly flexible. When using a laser method, which represents an electromagnetic method, the heat input can be regulated over the duration of the action of the laser on the first component and / or the second component and / or the plastic film. In this case, a laser has a predetermined wavelength.

If the introduction of heat into the plastic film is advantageously carried out using a method using heated rollers, the narrow space required for the narrow, preferably narrow, rollers can be used, in particular, or joint joints can be made in hard-to-reach locations. especially in vehicles or bodies.

Furthermore, it can preferably be provided that the first component and / or the second component is a steel material, in particular 22MnB5 steel, and / or titanium and / or magnesium and / or copper and / or an aluminum material, preferably aluminum or an aluminum alloy, in particular AA6016 and / or AA7021 and / or AA5182, wherein preferably the first component and / or the second component comprises a surface layer, in particular an aluminum-silicon surface layer.

The material 22MnB5 has an aluminum-silicon-layer (AlSi) as part of the corrosion protection. In known welding processes due to the AlSi layer, the risk of tearing off the joint. In the method for joining components, the joining of 22MnB5 steel is also possible with particular advantage. The first and / or the second component may with particular advantage comprise or consist of titanium and / or magnesium and / or copper and / or an aluminum material, preferably aluminum or an aluminum alloy. Thus, both joint connections between a first and a second component made of the same material as well as joints between a first and a second component from respectively different materials in different material pairings are possible.

It is particularly preferably provided that the first component consists of steel, in particular 22MnB5 steel, and that the second component consists of aluminum. The first component of 22MnB5 steel has, in particular, a surface layer, preferably an aluminum-silicon surface layer.

It is further preferred that the surface treatment method is a sandblasting method and / or an ejector method and / or a laser method, the patterning of the first joining face and / or the second joining face preferably comprising roughening the first joining face and / or the second joining face Preferably, the first joining surface and / or the second joining surface has a surface layer, in particular an aluminum-silicon surface layer, which is at least partially removed by the surface processing method.

The advantageous roughening of the first joining surface and / or the second joining surface preferably produces undercut-like structures, in particular in the form of indentations, bumps, grooves, undulations or grooves, on the first joining surface of the first component and / or on the second joining surface of the second component. If the first and / or second component has a surface layer, in particular an aluminum-silicon surface layer, this is advantageously removed, so that the surface layer no longer prevents a good connection between the first component and the second component. Furthermore, the first joining surface and / or the second joining surface may have a surface layer in the form of an oxide layer or a porous coating. Advantageously, these surface layers are removed, thus enabling a better joint connection between the first component and the second component. In other words, hindering surface states of the joining surface (for example AlSi protective layers) are removed during the pretreatment. Due to the heat conduction of the metal, the plastic film is heated and melted. The molten plastic can flow into the surface structures of the sheets or components. Upon cooling, the plastic hardens again and provides through the interaction with the undercut-like structures, such as grooves, grooves, depressions or Hubbel, for a connection between the sheets or components. This compound is particularly claimable on train.

In a further preferred embodiment it can be provided that undercuts and / or cavities are introduced into the first joining surface and / or in the second joining surface by the surface treatment method, wherein the undercuts preferably a form fit parallel and / or perpendicular to the plane of the first joining surface and / or allow the second joining surface.

The undercuts in the first joining surface and / or the second joining surface can be advantageously in the form of grooves, grooves, Hubbeln, depressions or the like and in particular represent a rough surface of the first joining surface or the second joining surface. Furthermore, the undercuts or Cavities in a cross-sectional view of the first component and / or second component, starting from the surface of the joining surface in the component projecting in the form of dovetail undercuts or be formed as widening into the component hopper. If the undercuts in the form of grooves, grooves, depressions or Hubbeln formed, they preferably allow a positive connection parallel to the plane or the touch plane, the first and the second joining surface. In other words, the melted-out plastic of the plastic film flows into the surface structures of the first component and / or the second component formed as undercuts in such a way that a positive connection in the plane which represents the contact plane between the first joining surface and the second joining surface arises results in a special tensile stability between the first component and the second component in the plane of the contact surface or the plane of the joining surfaces. If the undercuts and / or cavities are inserted into the first and / or second joining surface in such a way that they expand, in particular into the first and / or second component, starting from the first and / or second joining surface, for example in the form of a dovetail and / or one yourself widening cone or funnel, the molten plastic flows into the thus formed undercuts or cavities, whereby a positive connection between the plastic film and the first and / or the second joining surface in the direction perpendicular to the contact plane or the plane of the first and / or the second Joining surface is produced. By means of such a configuration, in addition to a particular tensile stability in the plane of the contact surface of the first joining surface and the second joining surface, a special tensile stability perpendicular to the contact plane of the first and the second joining surface is obtained. In such an embodiment, the joining compound obtained by the method is advantageously both well on train and peeling loadable.

Furthermore, it can preferably be provided that groove-shaped or groove-shaped structures, in particular grooves or grooves, are introduced into the first joining surface and / or into the second joining surface by the surface treatment method, the groove-shaped or groove-shaped structures preferably at an angle of 60 ° to 120 ° , Particularly preferably at an angle of 80 ° to 100 °, in particular preferably at an angle of substantially 90 °, are aligned to a loading direction of the joint to be produced by the method.

Such an alignment of the groove-shaped or groove-shaped structures produced in the first and / or in the second joining surface by the surface treatment method, in particular by a laser method, results in a particularly high tensile strength in the contact plane or in the plane of the first joining face and the second joining face, especially in loading direction, received. Laser structuring at an angle of 90 ° to the loading direction advantageously produces a high proportion of undercuts and can be specified by means of process parameters.

A suitable structuring of the first joining surface and / or the second joining surface can likewise preferably be produced by means of a sand blasting method or an absorbent blasting method with very coarse blasting material.

Further preferably, it can be provided that the joining connection to be produced by the method is carried out as a punctiform connection or as a seam-shaped connection.

A point connection can be produced in particular well by a friction welding method and / or by a laser method. A seam-like connection is particularly advantageous by the heat input by means of a method using heated rollers possible. Furthermore, it can preferably be provided that during the heat input into the plastic film two welds or two welds are placed per joint or joint, with a first weld or a first weld above the joint and another weld or another weld are placed below the joint , This means that in the plane or the touch plane of the first joining surface and the second joining surface, the welding points and / or the welds can be arranged either directly above one another or slightly offset from one another. Advantageously, when heat is introduced by welding per weld point or per weld a connection metal-plastic film is created. A pair of welds or a pair of welds forms a joint or joint of the combination of metal-plastic-metal.

Furthermore, it can be provided that the plastic film is matched to the expected stress. It can thus be used plastic with increased softening or melting temperature for temperature-resistant compounds. It can also be provided that tough plastic is used for ductile connection.

When heat is introduced into the plastic film by means of a laser process, it is possible, for example, to use the same laser which was used for the preceding surface structuring in the context of the surface treatment method.

The heat input by a friction stir welding process, for example by a friction spot welding process, or by means of heatable rollers is suitable because these methods can also be applied to other compounds, such as aluminum-aluminum welds and folds. Thus, no additional equipment or devices are needed with advantage.

Embodiments of the invention are explained below with reference to the drawings. It shows

1 : an arrangement for the application of a surface treatment method in the context of a method for joining components,

2 a joint before introduction of heat into a plastic film arranged between a first component and a second component,

3 a method step for introducing heat into a plastic film between a first component and a second component,

4 a joining connection produced by a method for joining components,

5 : an arrangement for the application of a surface treatment method in the context of a method for joining components provided with a surface layer,

6 a joint before the introduction of heat into a plastic film arranged between a first component with a surface layer and a second component,

7 a method step for introducing heat by means of a friction stir welding device into a plastic film between a first component and a second component,

8th : an arrangement for the application of a surface treatment method in the context of a method for joining components provided with narrow flanges,

9 : the arrangement of a plastic film between two components provided with narrow flanges,

10 a method step for introducing heat by means of heated rollers into a plastic film between components provided with narrow flanges, and

11 : A cross-sectional view of a first component with undercuts in a joint surface.

1 shows an arrangement 100 for the application of a surface treatment method as part of a method for joining components. A first component 10 with a first joining surface 11 and a second component 12 with a second joining surface 13 become when applying a surface treatment process with blasting 14 from a blasting device 15 in the area of the first joining surface 11 and the second joining surface 13 irradiated. By the irradiation with blasting material 14 For example, with laser beams or by a sand or Saugstrahlverfahren, be the first joining surface 11 and the second joining surface 13 structured, whereby by the irradiation with the blasting material 14 undercuts 16 in the form of grooves 17 , Screaming 18 or lifting 19 getting produced. The first component 10 can be made of steel, the second component 12 may consist of aluminum, in particular of an aluminum alloy such as AA6016 or AA7021 or AA5182.

2 shows a plastic film 20 which is between structuring or undercutting 16 in the form of grooves 17 , Screaming 18 or lifting 19 the first joining surface 11 of the first component 10 and the second joining surface 13 of the second component 12 is arranged. The structured surfaces of the first joining surface 11 and the second joining surface 13 lie opposite each other at the joint of the joint to be created. The plastic film 20 may include polyphenylene sulfide or polyetherimide or consist of polyphenylene sulfide or polyetherimide. In principle, the use of a thermoplastic polyamide 6 film is conceivable, but it is preferably provided that no polyamide 6 is used.

3 shows the arrangement 100 for a method for joining components in a further step. Heat W is from one of the second joint surface 13 opposite side 21 of the second component 12 into the joint 22 brought in. Due to the thermal conductivity of the material of the second component 12 the heat W is from the second side 21 of the second component 12 to the joint 22 and thus to the plastic film 20 directed. The plastic film 20 is melted and the plastic material flows into the contours of structuring, ie in particular in the undercuts 16 , Grooves 17 , Screaming 18 or between the Hubbel 19 , the first joining surface 11 and the second joining surface 13 , For heat input, a laser process or a friction stir welding process can be used.

In the 4 shows the joining connection produced by a method of joining components. Between the joining surface 11 and the joining surface 13 of the first component 10 and the second component 12 is the previously melted plastic film 20 solidifies and forms with the undercuts 16 in the form of grooves 17 , Screaming 18 or Hubbeln a positive joint connection between the first component 10 and the second component 12 ,

The 5 to 7 are essentially identical to the ones 1 to 4 , In contrast to the 1 to 4 is the first component 10 made of 22MnB5 steel the 5 however with a surface layer 23 made of aluminum-silicon. By irradiation with blasting material 14 For example, with laser beams or in a sand or Saugstrahlverfahren, from the jet device 15 become a first joining surface 11 of the first component 10 and a second joining surface 13 of the second component 12 structured. In the surface processing methods, the surface layer becomes 23 , or the aluminum-silicon layer, on the first component 10 in the area of the first joining surface 11 at least partially or completely removed. As with the example 1 to 4 be through the irradiation with blasting 14 undercuts 16 in the form of grooves 17 , Screaming 18 or lifting 19 produced.

6 is essentially identical to the 2 and shows a plastic film 20 which is between the first component 10 and the second component 12 in the area of the first joining surface 11 and the second joining surface 13 is arranged. The film may consist of thermoplastic polyamide 6, but preferably polyphenylene sulfide or polyetherimide is used. By applying the surface treatment method is located in the contact area of the first joint surface 11 and the second joining surface 13 no surface layer 23 , in particular no aluminum-silicon layer, more.

7 shows an arrangement 100 for introducing heat into between the first component 10 and the second component 12 arranged plastic film 20 by a friction spot welding process. A friction spot welding device 24 is on one of the second joint surface 13 opposite second side 21 of the second component 12 placed. The friction spot welding device 24 includes a friction pin 25 which is in physical contact with the second side 21 of the second component 12 stands. Below the first component 10 there is a counterholder 26 , By rotation of the friction pin 25 Heat W is in the second component 12 introduced, which due to the thermal conductivity of the second component 12 at the between the first component 10 and the second component 12 in the area of joining surfaces 11 . 13 arranged plastic film 20 is forwarded.

In an exemplary embodiment, it can be provided that the friction pin 25 of the tool in 0.5 seconds to a depth of 0.15 mm in the second component 12 , which consists of aluminum, is immersed. There, the friction bolt lingers for another 0.5 seconds and brings in this time heat W in the form of frictional heat in the material of the second component 12 one. After that, the friction pin 25 again from the second component 12 withdrawn and the friction point 27 refilled. This process takes 0.1 seconds. The process of heat input is complete. A pliers, not shown, which is the first component 10 and the second component 12 in the area of the joint 22 pressed against each other, remains closed for another three seconds, so that the plastic of the plastic film 20 can cool down. The one in the area of the first joining surface 11 and the second joining surface 13 Molten plastic flows into the undercuts 16 the first joining surface 11 and the second joining surface 13 and froze. The solidification causes a positive connection between the first component 10 and the second component 12 by means of the provided therebetween melted and re-hardened plastic film 20 generated.

The 8th to 10 show an arrangement 100 for applying a method for joining components, wherein a first component 10 with a first flange 28 and a second component 12 with a second flange 29 in an in 8th illustrated, first method step by means of a jet device 15 with blasting material 14 be irradiated, so that a first joint surface 11 and a second joining surface 13 each made with structured surfaces.

9 shows a further step of the method for joining components. The structured flanges 28 . 29 are aligned with each other and a plastic film 20 is between the flanges 28 . 29 placed.

In 10 is the introduction of heat into the plastic film 20 by means of two heated rollers 30 . 31 shown. The heated rollers 30 . 31 are each outside on the joint 22 on the first flange 28 and the second flange 29 placed. Between the first heated roller 30 and the second heated roller 31 Thus, there is a mixed combination of, for example, 22MnB5 steel of the first component 10 , a plastic film 20 , and for example aluminum of the second component 12 , The heated rollers 30 . 31 be put under pressure on the flanges 28 . 29 placed. The heated rollers 30 . 31 give heat W to the first flange 28 and the second flange 29 from. Due to the thermal conductivity of the first component 10 and the second component 12 Heat W is applied to the between the first flange 28 and the second flange 29 arranged plastic film 20 forwarded. The plastic film 20 starts to melt and undercuts 16 the first joining surface 11 and the second joining surface 13 flow into. The heated rollers 30 . 31 can along a longitudinal direction L of the flanges 28 . 29 be guided, creating a joint in the form of a seam 32 between the first flange 28 and the second flange 29 is produced. The of the heated rollers 30 . 31 melted plastic film 20 froze in the undercuts 16 and creates a positive connection between the first component 10 and the second component 12 ,

11 shows a first component 10 after applying a surface treatment method. The first component 10 has a first joining surface 11 which is structured due to the surface treatment method and undercuts 16 having. The undercuts 16 are in the form of dovetail or funnel-shaped depressions 33 in the first component 10 educated. The wells 33 thereby widening starting from the first joining surface 11 in the first component 10 into it. Flows plastic of a molten plastic film 20 into the dovetail or funnel-shaped depressions 33 the first joining surface 11 of the first component 10 into and solidifies there, so a positive connection between the plastic and the first component is formed 10 in a first direction R1 parallel to the plane of the joining surface 11 and in a second direction R2 perpendicular to the plane of the joining surface 11 out. Will also be the second component 12 with undercuts in the form of dovetailed or funnel-shaped depressions 33 formed, so has a joint connection produced in accordance with the method both parallel to the contact plane of the joining surfaces 11 . 13 as well as perpendicular to the contact plane of the joining surfaces 11 . 13 a form fit between Kunsstofffolie 20 and first component 10 and second component 12 on.

LIST OF REFERENCE NUMBERS

100

 arrangement

10

 First component

11

 First joining surface

12

 Second component

13

 Second joint surface

14

 blasting

15

 ray device

16

 undercuts

17

 grooves

18

 cried

19

 bump

20

 Plastic film

21

 page

22

 joint

23

 surface layer

24

 friction stir welding

25

 friction pin

26

 backstop

27

 Reibpunkt

28

 First flange

29

 Second flange

30

 First heated roller

31

 Second heated roller

32

 seam

33

 wells

W

 warmth

L

 longitudinal direction

R1

 First direction

R2

 Second direction

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

• US 2544355 A [0005]
• DE 102013007205 A1 [0006]

Claims (10)

Method for joining components, wherein a first component ( 10 ) and a second component ( 12 ), wherein a first joining surface ( 11 ) of the first component ( 10 ) and / or a second joint surface ( 13 ) of the second component ( 12 ) is structured with a surface treatment method, wherein the first joint surface ( 11 ) of the second joint surface ( 13 ) is arranged opposite, wherein a plastic film ( 20 ) between the first joining surface ( 11 ) and the second joint surface ( 13 ), the two components ( 10 . 12 ) by introducing heat (W) into the plastic film ( 20 ), so that the plastic film ( 20 ) melts, are welded together, characterized in that the plastic film ( 20 ) comprises a thermoplastic having a glass transition temperature above 0 ° C. The method of claim 1, wherein the thermoplastic resin has a glass transition temperature of above 40 ° C, preferably above 90 ° C. The method of claim 1 or 2, wherein the thermoplastic material is not an olefinic plastic, in particular no polypropylene. Method according to one of the preceding claims, wherein the thermoplastic material is an amorphous thermoplastic material, in particular polystyrene or polymethyl methacrylate or polyetherimide or polycarbonate or amorphous polyphenylene sulfide or amorphous polyetheretherketone. Method according to one of the preceding claims, wherein the introduction of heat (W) into the plastic film ( 20 ) by a mechanical method, preferably by a friction stir welding method, and / or by a method using heated rollers ( 30 . 31 ), and / or by an inductive method, and / or by a conductive method, and / or by an electromagnetic method, preferably by a laser method. Method according to one of the preceding claims, wherein the first component ( 10 ) and / or the second component ( 12 ) comprise a steel material, in particular 22MnB5 steel, and / or titanium and / or magnesium and / or copper and / or an aluminum material, preferably aluminum or an aluminum alloy, in particular AA6016 and / or AA7021 and / or AA5182, preferably the first Component ( 10 ) and / or the second component ( 12 ) a surface layer ( 23 ), in particular an aluminum-silicon surface layer. Method according to one of the preceding claims, wherein the surface treatment method is a sandblasting method and / or an ejector method and / or a laser method, wherein preferably the structuring of the first joining surface ( 11 ) and / or the second joint surface ( 13 ) a roughening of the first joining surface ( 11 ) and / or the second joint surface ( 13 ), wherein particularly preferably the first joining surface ( 11 ) and / or the second joint surface ( 13 ) a surface layer ( 23 ), in particular an aluminum-silicon surface layer, which is at least partially removed by the surface treatment method. Method according to one of the preceding claims, wherein by the surface treatment method undercuts ( 16 ) and / or cavities in the first joint surface ( 11 ) and / or in the second joint surface ( 13 ), the undercuts ( 16 ) preferably a form fit parallel and / or perpendicular to the plane of the first joining surface ( 11 ) and / or the second joint surface ( 13 ) enable. Method according to one of the preceding claims, wherein groove-shaped or groove-shaped structures are introduced into the first joining surface (11) by the surface treatment method. 11 ) and / or in the second joint surface ( 13 ), wherein the groove-like or groove-shaped structures preferably at an angle of 60 ° to 120 °, more preferably at an angle of 80 ° to 100 °, particularly preferably at an angle of substantially 90 °, to a loading direction of the Process to be produced joint connection are aligned. Method according to one of the preceding claims, wherein the joining compound to be produced by the method is carried out as a point connection or as a seam-like connection.

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