DE102018208269A1 - Method for producing an axle strut and axle strut for a vehicle - Google Patents

Abstract

Suspension struts in vehicles serve to absorb tensile, compressive or bending stresses. For this purpose, a method for producing an axle strut 1 is proposed in which at least one profile component 2 and a load introduction component 3 are provided, wherein the profile component 2 has at least one insertion portion 12 and Lasteinleitbauteil 3 has a receiving portion 10; the profiled component 2 is connected to the load-transfer component 3 by way of the axle strut 1, that the insertion portion 12 is inserted into the receiving portion 10, and an adhesive bond 18 is formed between the male and female portions 12, 10, the following being used to form the adhesive joint 18 Steps are performed: the insertion portion 12 and / or the receiving portion 10 are provided with a hardener varnish 13, wetted with a first adhesive 14 and provided with a second adhesive 15.

Description

The invention relates to a method for producing an axle strut having the features of the preamble of claim 1. Furthermore, the invention relates to an axle strut for a vehicle.

Suspension struts in vehicles are used to absorb tensile, compressive or bending stresses. Such suspension struts usually have a strut, wherein on both sides in each case a bearing point is arranged with a bearing eye. Furthermore, multi-part suspension struts are known, wherein the bearings are connected for example via an adhesive connection to the suspension strut.

The publication DE4441220A1 , which probably forms the closest prior art, discloses a pendulum support or the like for the articulated connection of chassis parts in motor vehicles, in which bearing eyes formed at the ends are integrally connected to one another by a shaft part. The shaft part produced by injection molding has longitudinally an inner hollow profile and a smooth outer contour. The separately manufactured by injection molding end pieces are integrally connected to the shaft part by a known joining technique, for example, adhesive bonding, ultrasonic welding, orbital welding technology.

The invention has for its object to provide a method of the type mentioned, which is characterized by a cost-effective production of an axle strut. It is another object of the invention to propose a corresponding Achstrebe.

This object is achieved by the features of claim 1 and by the features of claim 11. Advantageous embodiments will become apparent from the dependent claims, the drawings and the description.

A method for producing an axle strut is proposed. In particular, the individual method steps can be automated and / or implemented automatically and / or manually. The axle strut is preferably a finished end product. Alternatively, the axle strut is an intermediate product and can be manufactured in further process steps to a finished axle strut.

In a first method step, at least one, preferably exactly two, load introduction components and a profile component are provided. In particular, the load introduction component and / or the profile component can be positioned in a holding device. The at least one load introduction component and the profile component are preferably provided separately from one another. The individual method steps can be dealt with in any order and / or combined with each other.

The profile component has a plug-in section and the load introduction component has a receiving section for receiving the plug-in section. The profile component may have an elongated shape, wherein in particular a length dimension is greater than a width dimension of the profile component. The profile component preferably defines with its longitudinal axis a major axis, wherein the male portion is formed with respect to the major axis at the axial end of the profile component. Particularly preferably, the profile component on both sides of the insertion portion, wherein each of the two Einsteckabschnitte is assigned in each case a Lasteinleitbauteil. The insertion portion is in particular the region of the profile component which is received in the finished axle strut within the receiving portion. The receiving portion is open at least in an insertion region and formed closed in a bottom region. The insertion section is preferably inserted into the receiving section via the introduction region. Preferably, the bottom portion limits the receiving portion in the axial direction with respect to the main axis.

The load introduction component is preferably designed as an insert. The load introduction component thus has the function of the force or load introduction into the profile component. Preferably, the axle strut has exactly two of the load introduction components, wherein the two load introduction components are each arranged on the end side of the profile component. In particular, the two Lasteinleitbauteile identical or identical. The load introduction component has a recess, in particular a so-called bearing eye, for a bearing device. For example, the bearing device may be formed as a rubber-metal bearing, a bolt connection or an elastomer bearing.

The profile component is connected to the at least one load introduction component by the axle strut in that the insertion section is inserted into the receiving section. In particular, the load introduction component and the profile component for insertion relative to each other in the axial direction with respect to the main axis are moved to each other. In particular, the load introduction component and / or the profile component may be straight in the holding device in the axial direction with respect to the main axis. In principle, the two Lasteinleitbauteile can be connected at the same time with the profile component. Alternatively, the two Lasteinleitbauteile be connected in succession with the profile component.

In a further method step, an adhesive bond between the insertion portion and the receiving portion formed. In particular, the adhesive connection is formed before, during or after the insertion of the insertion section into the receiving section. Preferably, the Lasteinleitbauteil and the profile component via the adhesive bond are materially interconnected. The adhesive connection is preferably formed by a surface bonding of the insertion portion with the receiving portion.

In a further method step, the insertion section and / or the receiving section are provided with a hardener lacquer to form the adhesive connection. In particular, the hardener lacquer is applied to the receiving section before the insertion section is inserted. Before the application of the hardener paint, preferably the insertion section and / or the receiving section are pretreated and / or cleaned. The hardener lacquer can preferably be applied to the insertion section and / or the receiving section in a dipping process and / or in a spraying process. In particular, the hardener varnish is formed as a peroxide. In particular, the surface of the insertion section and / or the receiving section is completely wetted or painted with the hardener varnish.

In a preferred preparation process, the load introduction component is cleaned prior to the application of the hardener paint in a first cleaning step, pickled in a pickling step, cleaned in a second cleaning step and then dried in a drying step. In particular, the load introduction component is freed from contamination in the first cleaning step. In particular, in the pickling step, the surface, in particular of the receiving portion, is pickled, whereby an activation of the surface is implemented. After the pickling step, the load introduction component is preferably cleaned with distilled water in the second cleaning step. After the drying step, the load introduction component is storage-stable and prepared for bonding to the profile component.

Alternatively or optionally in addition, the profile component is cleaned in a further preferred preparation process prior to the application of the hardener paint in a further cleaning step and dried in a subsequent further drying step. Particularly preferably, the profile component is preferably treated with a cleaning agent, e.g. Isopropanol, cleaned. After the further drying step, the profile component is storage-stable and prepared for bonding to the load introduction component.

In a further method step, the insertion section and / or the receiving section are wetted with a first adhesive. In particular, the insertion section and / or the receiving section are wetted with the first adhesive after the application of the hardener varnish and / or before the insertion section is inserted into the receiving section. Preferably, the first adhesive is applied directly to the hardener varnish. The wetting of the insertion section and / or the receiving section may preferably be effected by immersion, by application, e.g. with a brush, or by spraying done. In particular, the surface of the insertion section and / or the receiving section is completely wetted with the hardener varnish. Specifically, the first adhesive is formed as an adhesive resin or a first adhesive component.

In a further method step, the insertion section and / or the receiving section are provided with a second adhesive. In particular, after insertion of the hardener varnish and / or after wetting with the first adhesive and / or before or during or after insertion of the insertion section into the receiving section, the insertion section and / or the receiving section are provided with the second adhesive. Preferably, the second adhesive is applied directly to the hardener varnish and / or the first adhesive. In particular, the insertion portion and / or the receiving portion is partially or completely provided with the second adhesive. Specifically, the second adhesive is formed as another adhesive resin or a second adhesive component. In particular, the first and second adhesive components are part of a multi-component adhesive.

The advantage of the invention is that optimal wetting of the relatively rough surface is implemented by the application of the hardener varnish and / or the first adhesive to the insertion section and / or the receiving section. The complete wetting of the surface also ensures that the adhesive bond allows a non-porous adhesion between the male portion and the female portion. Due to the high degree of reproducibility, a particularly cost-effective production method is proposed, wherein in addition the properties of the adhesive bond are significantly improved.

In a preferred implementation, a low-viscosity adhesive is used as the first adhesive and a high-viscosity adhesive is used as the second adhesive. In particular, the first adhesive has a viscosity of less than 10 ^ 5 mPa * s. In particular, the second adhesive has a viscosity of more than 10 ^ 5 mPa * s. Due to the different viscosity of the two adhesives, an adhesive bond can be realized, which is characterized by improved wetting between the two parts to be joined. In addition, the low-viscosity first adhesive ensures that no pores are formed in the highly loaded adhesive bond between the male portion and the female portion.

It is preferably provided that the profile component is produced in a pultrusion process. In particular, in the pultrusion process, a reinforcing material is embedded in a matrix, so that a fiber-reinforced material, in particular a fiber-reinforced plastic profile, is formed. The profile component can be manufactured continuously by the pultrusion process, whereby a modularization can be realized. The profile component can be cut to a length required for a specific vehicle type, in particular in continuous production, so that the overall length of the axle strut can be varied individually by selecting the corresponding profile component.

In the pultrusion process, the profile component is only partially cured, wherein the profile component is fully cured during or after the formation of the adhesive bond, in particular together with the adhesive bond. In particular, the profile component has a residual reactivity of more than 2%, preferably more than 5%, in particular more than 10%, which is preferably completely reacted during the curing. As a result, a connection of the adhesive bond to the profile component can be significantly improved.

In a further realization it is provided that the amount of the second adhesive is dimensioned such that the receiving portion is completely filled with the second adhesive after formation of the adhesive bond. Preferably, the receiving portion is only partially filled with the second adhesive prior to insertion. In particular, the first and the second adhesive, preferably the first and the second adhesive component, react with one another only upon mutual contact, preferably during the insertion of the insertion section into the receiving section. Preferably, a crosslinking reaction is started only upon contact of the hardener varnish with the first and / or the second adhesive.

In a further concrete implementation, it is provided that the receiving section and / or the insertion section is provided with the second adhesive before joining the two components. In particular, the second adhesive can be applied by means of spraying or dripping or pouring into the receiving section and / or onto the insertion section. In particular, the second adhesive is applied in the bottom region of the receiving section, in particular locally several times.

The second adhesive is distributed or displaced by the insertion of the insertion portion in the receiving portion. In particular, the merging under pressure on the profile and / or on the Lasteinleitbauteil a defined flow in the direction, in particular in the axial direction with respect to the main axis, the lead-in area generated. During insertion, the second adhesive is particularly preferably distributed uniformly in an adhesive gap between the insertion section and the receiving section. Thereby, an optimal distribution of the second adhesive is implemented in the adhesive gap, whereby the properties of the adhesive bond can be significantly improved.

It is envisaged that at least 10% of the receiving portion is filled with the second adhesive before joining the two components. In particular, more than 15%, in particular more than 20% of the receiving portion is filled with the second adhesive.

In an alternative implementation, it is provided that the receiving portion and the insertion portion is provided after insertion of the two components with the second adhesive, wherein the second adhesive is distributed by injection between the receiving portion and the insertion portion. In particular, the male portion is first positioned in the female portion. Preferably, the second adhesive is then injected under pressure into the adhesive gap, wherein in particular at the same time a defined flow is generated in the direction of the lead-in area.

In a further development, it is provided that the load introduction component and / or the profile component are tempered to a bonding temperature prior to the formation of the adhesive bond and cooled after the formation of the adhesive bond. Preferably, the Lasteinleitbauteil and / or the profile component to achieve the joining temperature heat is supplied. In particular, the load introduction component and / or the profile component is heated to a bonding temperature of at least 60 ° C., preferably more than 100 ° C., in particular not more than 160 ° C. Preferably, the joining temperature is adaptable according to the adhesive requirements. In addition, by heating the load introduction component and / or the profile component, the process time or reaction rate and / or the viscosity of the first and / or the second adhesive can be reduced. Thus, an accelerated reaction of the adhesive curing can be initiated. Furthermore, the connection and / or the wetting of the first and / or the second adhesive or of the adhesive bond on the two components can be improved.

In particular, heat is actively or passively withdrawn during cooling from the load introduction component and / or the profile component. The active one Cooling can be implemented by a cooling device. The passive cooling can be implemented by reducing or stopping a further supply of heat. Preferably, the Lasteinleitbauteil and / or the profile component are cooled until the adhesive is hand-tight or completely cured. By a slow controlled cooling can be guaranteed that the residual stress of the adhesive joint is significantly reduced.

The second adhesive is further distributed in the receiving portion during cooling due to a thermal reduction in volume of the Lasteinleitbauteils. Preferably, due to the thermal reduction in volume shrinkage of the Lasteinleitelements, whereby the adhesive gap between the male and the receiving portion is reduced. Due to the crushing produced thereby, the first adhesive disposed in the adhesive gap is further distributed in the axial direction and / or in a thickness direction transverse thereto with respect to the major axis in the adhesive gap. As a result, in particular pore formation of the adhesive bond can be avoided. The second adhesive is particularly preferably distributed further in the direction of the introduction region by the thermal volume reduction, wherein the second adhesive can preferably emerge from the receiving section in the introduction region. Preferably, an excess part of the adhesive selectively exits in the insertion region, whereby a quality assurance is ensured. In addition, by cooling a chemically and / or thermally induced volume contraction of the adhesive bond can be partially or completely compensated, whereby in particular a detachment of the adhesive bond from the surface of the two components is prevented.

In a specific embodiment it is provided that the receiving portion has a distance from the insertion portion for forming an adhesive reservoir.

The distance is in particular formed by an adapted formation, preferably a recess and / or depression, in the bottom region and / or the introduction region. Preferably, the distance in the axial direction and / or in the radial direction with respect to the main axis between the receiving portion and the insertion portion is formed. Particularly preferably, the second adhesive is received in the adhesive reservoir.

The second adhesive is received in the gap, wherein upon cooling of the Lasteinleitbauteils due to a pressure on the second adhesive is impressed, whereby the second adhesive is further distributed in the receiving portion. In particular, the pressure on the second adhesive is purposefully increased on account of the thermal volume reduction of the load introduction component. Due to the pressure generated, the all-sided connection of the adhesive bond to the insertion section and / or the receiving section is additionally improved. In addition, the second adhesive can be further distributed in the adhesive gap, whereby the risk of air bubbles or pore formation prevented.

In a further embodiment it is provided that the receiving portion is formed from at least one transverse groove and / or at least one longitudinal groove. In particular, the receiving portion of more than two, preferably exactly three, longitudinal grooves are formed. In particular, the receiving portion can be formed from more or exactly two transverse grooves. Preferably, the transverse grooves and / or the longitudinal grooves are formed as continuous grooves, which are designed to be open at the ends. Preferably, all the longitudinal grooves and / or all transverse grooves are uniformly spaced from each other and / or parallel to each other introduced into the Lasteinleitelement. Particularly preferably, the longitudinal grooves and the transverse grooves are introduced equally deep into the load introduction element. In particular, the transverse grooves extend transversely to the longitudinal grooves, so that all longitudinal grooves are cut at least once through the transverse grooves. Thus, all grooves are connected to each other, so that a uniform distribution of the adhesive can be done on all grooves.

Before forming the adhesive bond, the transverse groove and / or the longitudinal groove are sealed at least at the end by a sealant. The sealing means is preferably connected in a form-fitting manner with the load introduction component, in particular pressed on. Preferably, the open ends of the transverse groove and / or the longitudinal groove are sealed by the sealing means, so that the receiving portion is preferably completely sealed except for the insertion region. Thus, it can be ensured that the second adhesive, in particular when inserting the insertion section into the receiving section or during the injection, remains in the adhesive gap within the receiving section or a defined flow is converted in the direction of the introduction area.

Optionally, it can additionally be provided that the insertion region is closed and / or sealed during insertion, for example by the profile component itself or another sealing means. In particular, the sealing means is made of an elastic material, preferably an elastomer or a thermoplastic. Alternatively or optionally additionally, the sealing means is formed from a hard material, preferably metal. In particular, the sealant may be cup-shaped or sleeve-like or clip-like, wherein the Sealant encloses the Lasteinleitbauteil in particular in an assembled state.

Another object of the invention relates to a Achsstrebe for vehicle, which was preferably prepared by the method previously described. The axle strut can be used in a chassis of a vehicle, for. B. in a commercial vehicle, truck or car. The axle strut is claimed in a driving operation largely axially along the main axis, in particular by pressure and / or tensile forces, and / or in at a occurring roll load of the vehicle to torsion.

The axle strut has the at least one load introduction component and the profile component, wherein the insertion portion is received in the receiving portion and is connected by the adhesive connection with the receiving portion. Preferably, the axle strut has exactly two of the load introduction components, which are each connected at the end to the profile component via an adhesive connection. The two load introduction components are preferably uniform or identical. Particularly preferably, both Lasteinleitbauteile on uniformly shaped receiving portions. Alternatively, however, the receiving sections may also have differently shaped receiving sections. The two axial ends of the profile component preferably each form a plug-in section. The receiving portion is preferably formed by at least one of the grooves. Alternatively, however, the receiving portion may also be formed as a fit, which is designed so that it can accommodate the respective insertion portion of the profile component.

The adhesive bond is distributed evenly between the receiving portion and the insertion portion. The plug-in section and the receiving section are preferably connected to one another in a flat manner via the adhesive connection. In particular, the second adhesive, on the one hand, contacts the receiving section on the one hand and the plug-in section on the other. Preferably, the two-dimensional adhesive bond at any point a uniform adhesive layer thickness, in the sense of a spatial extent of the adhesive having.

In a concrete embodiment, the second adhesive is offset by a multiplicity of ball elements which are designed and / or suitable for defining the adhesive thickness. In particular, all ball elements have the identical ball diameter. The ball elements are preferably formed as glass beads. The positioning of the profile component in the receiving section is supported by the ball elements arranged in the adhesive. In particular, it is prevented by the ball elements that a minimum required adhesive layer thickness of the adhesive bond is exceeded.

It is preferably provided that the adhesive connection has an increased adhesive layer thickness in the region of the distance from the actual adhesive gap. In particular, the second adhesive is thicker in the region of the distance than at another point of the adhesive bond. Due to the increased adhesive layer thickness of the adhesive bond, a higher elasticity, a higher ductility or elongation at break is formed at this point.

In a further constructive specification, it is provided that the profile component is formed from at least one longitudinal profile and at least one transverse profile, wherein the longitudinal profile is connected to the transverse profile. In particular, the profile component is formed in one piece or in several parts. In a one-piece molding, the profile component is made in one piece, so it is not assembled from different components. For example, the profile component can be produced by means of the pultrusion process or by means of a pultring process. The one-piece profile component can not be disassembled nondestructively. In a multi-part molding, the profile component of several components, preferably cohesively, joined together. Particularly preferably, the profile component of several, in particular exactly three, mutually parallel longitudinal profiles formed, which are connected to each other via at least one, preferably exactly two, transverse profiles. The at least one longitudinal profile and / or the at least one transverse profile are preferably formed as a thin strip of material similar to a rectangular plate. Particularly preferably, the profile component is tubular, wherein the profile component in particular has a rectangular opening cross-section.

In each case, the at least one longitudinal profile is received in the at least one longitudinal groove and the at least one transverse profile in the at least one transverse groove. In particular, the receiving section has the same number of longitudinal grooves as the profile component has on longitudinal profiles and / or has the same number of transverse grooves as the profile component has on transverse profiles. In particular, each of the longitudinal profiles is in each case received in a separate longitudinal groove and / or each of the transverse profiles in each case in a separate transverse groove.

In a preferred specific embodiment, the profile component is formed from a fiber-reinforced plastic composite material. In particular, the profile component is made of an endless fiber-reinforced plastic, wherein in particular the at least one longitudinal profile and / or the at least one transverse profile is a unidirectional Have fiber reinforcement. Preferably, the fibers are aligned in the axial direction with respect to the major axis. The profile component may be formed of a carbon fiber reinforced plastic composite (CFRP) or a glass fiber reinforced plastic composite (GRP) or of an aramid reinforced plastic composite (AFK).

Alternatively or optionally in addition, the load introduction component is made of a metal. In particular, the load introduction component is made of aluminum. Preferably, the Lasteinleitbauelement is produced by the extrusion process.

• 1 in einer dreidimensionalen Darstellung eine Achsstrebe für ein Fahrzeug als ein Ausführungsbeispiel der Erfindung;
• 2 einen Querschnitt eines Profilbauteils der Achsstrebe aus 1;
• 3 in einer dreidimensionalen Darstellung ein Lasteinleitelement der Achsstrebe aus 1;
• 4a-c in einer schematischen Darstellung drei Verfahrensschritte zur Herstellung der Achsstrebe aus 1;
• 5 eine Detailansicht der Achsstrebe aus 1.

The present invention will be further explained with reference to the drawing, wherein further advantages, features and effects of the figure description can be found. Show it:

• 1 in a three-dimensional representation of an axle brace for a vehicle as an embodiment of the invention;
• 2 a cross section of a profile component of the axle strut 1 ;
• 3 in a three-dimensional representation of a Lasteinleitelement the Achsstrebe 1 ;
• 4a-c in a schematic representation of three process steps for the production of the axle strut from 1 ;
• 5 a detailed view of the axle strut 1 ,

1 shows a three-dimensional representation of an axle strut 1 , which is designed and / or suitable for a vehicle. For example, the axle strut 1 be arranged in a chassis of a tractor in the lower link level. For example, the axle strut is used 1 for absorbing compressive and / or tensile and / or torsional forces.

The axle strut 1 has a profile component 2 as well as two load introduction components 3 on, with the two load introduction components 3 each end to the profile component 2 are arranged. The two load introduction components are preferred 3 cohesively with the profile component 2 connected. For example, the two load introduction components 3 made of aluminum and manufactured in an extrusion process. For example, the profile component 2 made of a fiber-reinforced composite plastic and produced in a pultrusion process.

The profile component 2 defines with its longitudinal axis a major axis H , where the axle strut 1 in relation to the main axis H is formed axisymmetric. The profile component 2 has an elongated shape, wherein a length dimension of the profile component 2 significantly smaller than a width dimension of the profile component 2 is. For example, the profile component 2 a length of more than 400 mm and a width of less than 50 mm.

The two load introduction elements 3 each have a bearing eye 4 on, with the bearing eye 4 for receiving a bearing device, for example an elastomer bearing, is formed and / or suitable. The bearing eyes 4 are cylindrical. The two load introduction elements 3 are designed as two identical parts, wherein in a production of the axle strut 1 the length dimension of the profile component 2 can be varied according to requirements, so that a simple modularization in the production of the axle strut 2 is implemented.

The 2 shows a cross section of the profile component 2 , The profile component 2 is tubular and has a rectangular or square opening cross-section viewed in a coarse form. The profile component 2 is by several, especially exactly three longitudinal profiles 6 and a plurality, in particular exactly two or four, transverse profiles 5 educated. The transverse and longitudinal profiles 5 . 6 extend parallel to the main axis H in the axial direction. The longitudinal profiles 6 are uniformly shaped to each other and the cross sections 5 are also uniformly shaped to each other. The profiles 5 . 6 are plate-shaped and, for example, in one piece, in particular made of one piece, connected to each other. For example, the transverse and longitudinal profiles 5 . 6 have a unidirectional fiber reinforcement, wherein the fiber profile in the axial direction with respect to the main axis H is aligned.

The longitudinal profiles 6 are equally spaced from each other, with each of the longitudinal profiles 6 over two transverse profiles each 5 with the adjacent longitudinal profile 6 connected is. The cross sections 5 extend in the transverse direction to the longitudinal profiles 6 , where the cross sections 5 each on a side surface of the associated longitudinal profiles 6 are connected. The profile component 2 , in particular the cross section, is in relation to the main axis H formed axisymmetric.

3 shows in a three-dimensional view of one of the Lasteinleitbauteile 3 from the 1 , the load introduction component 3 has a receiving section 7 for receiving the profile component 2 on. The recording section 7 is by several longitudinal grooves 8th and several transverse grooves 9 formed, wherein the receiving portion 7 in an introductory area 10 in the axial direction with respect to the main axis H out open, so that the profile component 2 over the introductory area 10 in the recording section 7 can be introduced. The recording section 7 has exactly three of the longitudinal grooves 8th and exactly two of the transverse grooves 9 on. This corresponds to the Number of longitudinal grooves 8th the number of longitudinal profiles 6 of the profile component 2 and / or the number of transverse grooves 9 the number of cross sections 5 of the profile component 2 , The longitudinal grooves 8th serve to accommodate the longitudinal profiles 6 and the cross grooves 9 serve to accommodate the cross sections 5 ,

The longitudinal grooves 8th parallel to each other, with the transverse grooves 9 again transverse to the longitudinal grooves 8th run and are also aligned parallel to each other. The two transverse grooves intersect 9 in each case the three longitudinal grooves 8th so that the receiving section 6 for example, grid-shaped or grid-shaped by the grooves 8th . 9 is trained. The grooves 8th . 9 are formed as continuous grooves due to the continuous manufacturing process, wherein the grooves 8th . 9 open at the end.

The longitudinal grooves 8th and the cross grooves 9 are equally deep into the load introduction component 3 introduced, wherein the transverse grooves 9 and the longitudinal grooves 8th together a floor area 11 the receiving section 6 define. The floor area 11 extends in a radial plane with respect to the main axis H , wherein the receiving section 7 in the axial direction with respect to the main axis H through the floor area 11 is limited.

The 4a to c show three process steps of a method for producing the axle strut 1 of the 1 , In the illustrations shown, the load introduction component 3 and a section of the profile component 2 illustrated, wherein the method steps described below analogous to both load input components 3 can be applied. For example, the Lasteinleitbauteile 3 and / or the profile component 2 for carrying out the method steps fixed in a holding device and / or in the axial direction with respect to the main axis H be straight through the holding device.

In the 4a are the load introduction element 3 and the profile component 2 shown separated from each other. In a first method step, a plug-in section is used 12 of the profile component 2 a hardener varnish 13 applied. The profile component 2 For example, each end has the insertion section 12 on, wherein the insertion section 12 as the two axial ends of the profile component 2 in relation to the main axis H is trained. The insertion section 12 extends, for example, in the axial direction with respect to the main axis H over an end area of at least 50 mm. Optionally in addition to the receiving section 7 also with the hardener varnish 13 be provided. For a uniform application of the hardener varnish 13 on the insertion section 12 or on the receiving section 7 the hardener varnish can be applied by a dipping process.

In a further possible method step, the insertion section 12 and / or the receiving section 7 with a first glue 14 be wetted. The first glue 14 is designed as a low-viscosity adhesive resin or a low-viscosity first adhesive component. For example, the first adhesive 14 a viscosity of less than 10 ^ 5 mPa * s. To guarantee complete wetting, the first glue becomes 14 by a dipping process on the insertion section 12 and / or the receiving section 7 applied. By the separate application of the hardener varnish 13 and / or the first adhesive 14 becomes a storage stability of the otherwise oxidizing surface, in particular of the load introduction made of aluminum 3 , allows.

In a further process step, a second adhesive 15 in the ground area 11 the receiving section 7 applied. The second glue 15 is designed as a high-viscosity adhesive resin or a high-viscosity second adhesive component. For example, the second adhesive 15 a viscosity of more than 10 ^ 5 mPa * s. The different viscosities of the two adhesives 14 . 15 have an advantageous effect on the wetting of the insertion section 12 and the receiving section 7 and thus on the adhesive quality. The recording section 7 Only partially with the second adhesive 15 provided so that at least 15% of the receiving section 7 with the second glue 15 is filled. The entire floor area is preferred 11 the receiving section 7 with the second glue 15 covered.

For example, the grooves must 8th . 9 due to the continuous course, before the bonding process or the arrangement of the second adhesive 15 in the receiving section 7 be closed at the end by a sealant, otherwise the second adhesive 15 especially during insertion of the profile component 2 from the receiving section 7 can escape.

For inserting the two components 2 . 3 , becomes the profile component 2 in the axial direction with respect to the main axis H over the introductory area 10 in the recording section 7 , as in 4b shown, plugged. In this case, the profile component with a low axial pressure in the direction of the receiving portion 7 be charged. As an option, the load introduction component can optionally be added 3 be tempered to a bonding temperature, wherein the bonding temperature, for example, in a range between 60 ° C and 160 ° C. As a result, in particular, the viscosity of the second high-viscosity adhesive 15 be reduced to a good connection or wetting between the male section 12 and the receiving section 7 to enable.

When inserting the insertion section 12 in the recording section 7 , becomes the second glue 15 in the floor area 11 displaced, with a defined flow in the direction of the lead-in area 10 is produced. This is the second adhesive 15 in a glue gap 16 between the insertion section 12 and the receiving section 7 evenly distributed, with a crosslinking reaction between the first and the second adhesive 14 . 15 only started with a direct contact. The insertion section 12 is doing so far in the receiving section 7 inserted until the insertion section 12 completely or at least predominantly in the receiving section 7 is included.

In a further process step, as in 4c is shown, the Lasteinleitbauteil 3 cooled, wherein the cooling of the Lasteinleitbauteils 3 a thermal volume reduction takes place. In this case, the cooling process can be actively implemented by a cooling device or passively by avoiding a further supply of heat. Due to the cooling, there is a shrinkage of the Lasteinleitbauteils 3 in the axial direction with respect to the main axis H and / or in a thickness direction. This results in a reduction of the adhesive gap 16 in the axial direction and / or in the radial direction with respect to the main axis H , so that in particular the second adhesive disposed therein 15 is squeezed and continues towards the introduction area 10 is distributed. By doing that the introductory area 10 , especially in the area of the glue gap 16 , open design, excess adhesive can escape in this area, causing a thickening 17 in the introductory area 10 is formed.

As a result of the further heat emission of the load introduction component 3 Curing takes place until the second adhesive 15 hand-tight or fully cured. The complete curing can be done without supplying additional heat energy in a few hours or days, creating a finished adhesive bond 18 between the receiving section 7 and the insertion section 12 is formed. For example, the profile component 2 not completely cured in the production by the pultrusion process, but has a proportion of about 2 to 12% residual reactivity only when curing the adhesive bond 18 is fully implemented and thus an ideal connection of the adhesive bond 18 to the profile component 2 guaranteed.

5 shows a detailed view of the receiving portion 7 , in particular one of the longitudinal grooves 8th , with the over the adhesive bond 18 glued insertion section 12 , in particular one of the longitudinal profiles 6 , The recording section 7 points in the bottom area 11 a distance 19 on, where by the distance 19 the adhesive bond 18 has an increased adhesive layer thickness. Further, the receiving portion in the insertion area 10 another distance 20 have, wherein the adhesive bond 18 in the range of the further distance 20 also has an increased adhesive layer thickness. For example, the second adhesive 15 be provided with a plurality of equal-sized ball elements, such as glass balls, wherein by the ball elements a minimum required adhesive layer thickness, in particular in the adhesive gap 16 , can not be fallen below.

The distance 19 and / or the further distance 20 are each formed by a molding, with the two distances 19 . 20 Voltage peaks between the profile component 2 and the load introduction member 3 be avoided. By the distance 19 or the further distance 20 is a kind of adhesive reservoir formed, for example, during the cooling process due to the thermal shrinkage of the Lasteinleitbauteils 3 an advantageous imprint in the range of the two distances 19 . 20 on the glue 15 or the adhesive bond 18 can be realized. This is a targeted pressure on the adhesive 15 or the adhesive bond 18 generates, whereby the occurring movement of the second adhesive 15 towards the introduction area 10 is increased. This slightly imprinted pressure on the second adhesive 15 or the adhesive bond 18 assists in the universal connection to the load introduction component 3 or the profile component 2 ,

In addition, the cooling process causes volume contraction due to the chemical reaction of the two adhesives 14 . 15 with each other and / or a thermally induced volume reduction, for example, a shrinkage, shrinkage, etc., the adhesive bond 18 partially or completely compensated, so that no pores or detachments from the surface of the profile component 2 and / or the load introduction component 3 arise. Thus, the thermal shrinkage of the Lasteinleitbauteils supported 3 a faultless formation of the adhesive bond 18 through a directed nonsense process.

LIST OF REFERENCE NUMBERS

1

Torque rod

2

profile component

3

Lasteinleitbauteil

4

bearing eye

5

cross sections

6

longitudinal profiles

7

receiving portion

8th

longitudinal grooves

9

transverse grooves

10

introduction section

11

floor area

12

insertion section

13

Activator

14

first glue

15

second adhesive

16

bonding gap

17

thickening

18

adhesive bond

19

distance

20

further distance

H

main axis

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

• DE 4441220 A1 [0003]

Claims (15)

Method for producing an axle strut (1), in which: - At least one profile component (2) and a Lasteinleitbauteil (3) are provided, wherein the profile component (2) has at least one insertion portion (12) and the Lasteinleitbauteil (3) has a receiving portion (10) for receiving the Einsteckabschnitts (12), - The profile component (2) with the at least one Lasteinleitbauteil (3) is thereby connected to the Achsstrebe (1) that the insertion portion (12) is inserted into the receiving portion (10), and an adhesive bond (18) is formed between the insertion section (12) and the receiving section (10), wherein the following steps are carried out to form the adhesive bond (18): - The insertion portion (12) and / or the receiving portion (10) are provided with a hardener varnish (13); - The insertion portion (12) and / or the receiving portion (10) are wetted with a first adhesive (14); - The insertion portion (12) and / or the receiving portion (10) are provided with a second adhesive (15). Method according to Claim 1 , characterized in that a low-viscosity adhesive is used as the first adhesive (14) and a high-viscosity adhesive is used as the second adhesive (15). Method according to Claim 1 or 2 , characterized in that the profile component (2) is produced in a pultrusion process, wherein the profile component (2) is only partially cured in the pultrusion process and wherein the profile component (2) is fully cured during or after the formation of the adhesive bond (18). Method according to one of the preceding claims, characterized in that the amount of the second adhesive (15) is dimensioned such that the receiving portion (15) after formation of the adhesive bond (18) is completely filled with the second adhesive (15). Method according to Claim 4 , characterized in that the receiving portion (10) and / or the insertion portion (12) before the joining of the components (2, 3) with the second adhesive (15) is provided, wherein the second adhesive (15) by the insertion of the insertion portion (12) is distributed in the receiving portion (10). Method according to Claim 4 or 5 , characterized in that at least 10% of the receiving portion (7) before the joining of the components (2, 3) with the second adhesive (15) is filled. Method according to Claim 4 , characterized in that the receiving portion (7) and the insertion portion (12) after insertion of the components (2, 3) with the second adhesive (15) is provided, wherein the second adhesive (15) by injection between the receiving portion (7 ) and the insertion portion (12) is distributed. Method according to one of the preceding claims, characterized in that the Lasteinleitbauteil (3) before the formation of the adhesive bond (18) is heated to a bonding temperature and that the Lasteinleitbauteil (3) after the formation of the adhesive bond (18) is cooled, the second Adhesive (15) is further distributed in the receiving portion (10) during cooling due to a thermal reduction in volume of the Lasteinleitbauteils (2). Method according to Claim 8 characterized in that the receiving portion (10) has at least one clearance (19, 20) to the insertion portion (12) for forming an adhesive reservoir, the second adhesive (15) being received in the clearance (19, 20) Cooling the Lasteinleitbauteils (2) in the region of the distance (19, 20) a pressure on the second adhesive (15) is impressed, whereby the second adhesive (15) is further distributed in the receiving portion (6). Method according to one of the preceding claims, characterized in that the receiving portion (7) from at least one transverse groove (9) and / or at least one longitudinal groove (8) is formed, wherein prior to the formation of the adhesive bond (18) the transverse groove (9) and / or the longitudinal groove (8) are sealed at least at the end by a sealant. Axle strut (1) for a vehicle, characterized in that the axle strut (1) at least one Lasteinleitbauteil (3) and a profile component (2), wherein the profile component (2) has a Einsteckabschnitt (12) and the Lasteinleitbauteil (2) a receiving portion (3), wherein the insertion portion (12) in the receiving portion (3) is received and connected by an adhesive connection (18) with the receiving portion (6), wherein the adhesive bond (18) between the receiving portion (7) and the Inserted portion (12) is distributed; and / or that the axle strut (1) is manufactured according to the manufacturing method of the preceding claims. Axle strut (1) to Claim 11 , characterized in that the second adhesive (15) is offset with ball elements for defining an adhesive layer thickness. Axle strut (1) to Claim 11 or 12 , characterized in that the adhesive connection (18) in the region of the distance (19, 20) has an increased adhesive layer thickness compared to a proper adhesive gap (16). Axle strut (1) after one of Claims 11 to 13 , characterized in that the profile component (2) from at least one longitudinal profile (6) and at least one transverse profile (5) is formed, wherein the longitudinal profile (6) with the transverse profile (5) is connected. Axle strut (1) after one of Claims 11 to 14 , characterized in that the profile component (2) is formed from a fiber-reinforced plastic composite material and / or the Lasteinleitbauteil (3) is made of a metal.

Images