DE102019212185A1 - Method for producing a chassis component and such a chassis component - Google Patents

Abstract

The invention relates to a method for producing a chassis component (14) in which a component body (17) is produced from a fiber-reinforced plastic, in which a connection part (2) is connected to the component body (17), a fastening section (10) of the connection part (2) is fastened in an end section (5) of the component body (17) and a connecting section (11) of the connection part (2) protrudes from the end section (5). In order to reduce the assembly effort and / or to realize a connection between the connection part (2) and the component body (17) both safely and easily, the method is characterized in that the component body (17) is made of a plastic matrix (16) impregnated Semifinished fiber product (1) is formed, wherein in order to fasten the fastening section (10) in the end section (5), the fastening section (10) is initially arranged within the semifinished fiber product (1) in an arrangement step and then the semifinished fiber product (1) with the in an impregnation step Plastic matrix (16) is impregnated.

Description

The invention relates to a method for producing a chassis component in which a component body is produced from a fiber-reinforced plastic, in which a connection part is connected to the component body, a fastening section of the connection part being fastened in an end section of the component body and a connection section of the connection part being made from the End section protrudes. Furthermore, the invention relates to a chassis component produced according to such a method, wherein a component body is made from a fiber-reinforced plastic, a connection part is connected to the component body, a fastening section of the connection part being fastened in an end section of the component body and a connection section of the connection part from the End section protrudes.

Such a method or chassis component is from DE 10 2010 049 565 A1 known. Here, the chassis component is designed as a torsion bar for a vehicle. In each of the ends of a tubular component body, a connection part for forming a form fit is partially inserted. As an alternative, it is disclosed that the connection part can be glued and / or injection-molded onto the tubular component body. For example, the connection part can be overmolded together with the tubular component body with a plastic material.

A chassis component designed as a torsion bar spring is also referred to as a stabilizer. Stabilizers or torsion bar springs are generally known in motor vehicle technology, in particular in chassis construction, for use as roll stabilizers. These are components that are mainly subject to torsion, in particular torsion and / or bending, which reduce the rolling movements of a vehicle. To stabilize the roll structure of vehicles, stabilizers can be arranged between the wheels on an axle of a vehicle. If the wheels on an axle are deflected alternately, stabilizers distribute the axle load and thus ensure an even axle load distribution. In this way, the driving behavior of a vehicle can be positively influenced in such a way that, for example, the adhesion coefficients of the wheels arranged on an axle can always be kept almost identically at a good level.

The ends of known stabilizers can usually each be arranged and / or supported via pendulum supports on a separate component, for example a wheel-guiding element, such as a wheel carrier or a wheel-guiding link. The pendulum supports can be designed as separate components. A connection part can connect the component body or stabilizer body and the pendulum support to one another. The connection part can thus be designed as an intermediate piece between the pendulum support on the one hand and the stabilizer body on the other.

The object on which the invention is based is to further develop a method and / or a chassis component of the type mentioned at the outset in such a way that the assembly effort is reduced and / or a connection between the connecting part and the component body can be implemented safely and easily at the same time. The proportion of individual parts to be assembled in the manufacture of the chassis component and / or the number of process steps in the production of the chassis component should preferably be reduced. In particular, an alternative embodiment is to be provided.

The object on which the invention is based is achieved with a method according to claim 1 and / or by means of a chassis component according to claim 12. Preferred developments of the invention can be found in the subclaims and in the following description.

The method is designed to produce a chassis component, in particular for a chassis of a motor vehicle. Here, a component body is made from a fiber-reinforced plastic. A connection part is connected to the component body. For this purpose, a fastening section of the connection part is fastened in an end section of the component body. A connecting section of the connection part protrudes from the end section of the component body. The component body is formed from a semi-finished fiber product impregnated with a plastic matrix. In order to fasten the fastening section in the end section, the fastening section is first arranged within the semifinished fiber product in an arrangement step. The semifinished fiber product is then impregnated with the plastic matrix in an impregnation step.

The advantage here is that the fastening section of the connection part can interact with the semifinished fiber product due to the arrangement within the semifinished fiber product. This results in a particularly firm and / or resilient connection between the component body and the connection part. After the impregnation step, there is preferably a hardening step in which the injected plastic matrix hardens.

In particular, in the arrangement step, the fastening section of the connection portion is surrounded by the semifinished fiber product and / or by fibers of the semifinished fiber product. Of the Fastening section of the connection part can be embedded in the semifinished fiber product in fibers of the semifinished fiber product. The fastening section is preferably surrounded and / or enclosed coaxially by the semifinished fiber product and / or by fibers of the semifinished fiber product. The semifinished fiber product, in particular fibers of the semifinished fiber product, and the fastening section of the connecting part can thus at least partially interact and / or be in direct contact with one another. This enables a particularly firm or resilient connection between the connection part and the component body.

According to a development, the fastening section has a form-fit profile and / or at least one form-fit element. The form-fit profile and / or form-fit element can be formed by means of depressions, elevations, openings and / or suitable contours. In particular, in the impregnation step, the form-fit profile and / or the form-fit element is embedded in the plastic matrix and / or encapsulated with the plastic matrix. In this way, at least one form fit can be implemented between the fastening section of the connection part and the end section of the component body.

The connection part can be formed from a metal. The plastic matrix can have a thermoset plastic. Alternatively, the connection part can also be formed from a fiber-reinforced plastic or from a non-fiber-reinforced plastic. With a suitable choice of material for the connection part, a material connection between the material of the connection part and the plastic matrix can also be realized.

According to a further embodiment, the semifinished fiber product in the arrangement step and / or in the impregnation step at least partially and in the area of the form-fit profile and / or the form-fit element assumes a shape that corresponds to, in particular cooperates with, the form-fit profile and / or form-fit element. As a result, not only does the material of the plastic matrix interact with the form-fit profile and / or the form-fit element to form the form fit, but also the semifinished fiber product or fibers of the semifinished fiber product. As a result, the connection between the connection part and the component body is made stronger or more resilient. The semifinished fiber product is preferably arranged at least partially in at least one recess in the form-fit profile and / or the form-fit element. The form-fit profile and / or the form-fit element can be formed by means of a sequence of alternating depressions and elevations. For example, the form-fit profile can be designed in a wave-like and / or corrugated manner.

The semifinished fiber product is preferably dry in the arrangement step. A braided core with layers of fiber fabric or fiber braid braided around the braided core can be used as a semi-finished fiber product. The semifinished fiber product can be formed from long fibers or continuous fibers. The braided core can be formed from continuous fibers extending in the longitudinal direction of the component body. In order to be able to introduce the fastening section into the end section of the component body, the braided core can be expanded beforehand by means of a mandrel. Alternatively, a semi-finished fiber product can be formed without a braided core or at least without a permanently remaining braided core.

According to an alternative and also independently conceivable embodiment independently of the present application, the semifinished fiber product can already be impregnated or pre-impregnated before the arrangement step. In particular, the semifinished fiber product can be designed as a so-called prepreg material or fiber matrix semifinished product. In this case, however, the plastic matrix, in particular the thermosetting plastic, is not hardened in the arrangement step. The curing step takes place only after the arrangement step. Pressing and / or hardening preferably takes place in the hardening step. This can be done in a shaping tool. In this way, the connection part can be permanently connected to the component body at the same time.

According to a further development, a rod-like or tubular fiber semi-finished product is used. In particular, the semifinished fiber product can have a round, circular, oval and / or ellipsoidal cross section. In the arranging step, the fastening section is preferably plugged or introduced into an end face or pipe opening of the end section of the semifinished fiber product. When inserting or introducing the fastening section, the semifinished fiber product can expand in the region of the end section, in particular radially outwardly to the axial longitudinal extension of the semifinished fiber product, so that the fastening section can be received in the end section.

In the impregnation step, a form fit and / or a material fit between the end section of the component body and the fastening section of the connection part is preferably produced. In particular, at least one form fit between the fastening section of the connection part and the end section of the component body will be realized. With a suitable choice of material for the connecting part, a material connection between the Material of the connection part and the plastic matrix can be realized.

According to a further embodiment, the connecting section of the connecting part is shielded from the plastic matrix in the impregnation step. This ensures that the connecting section protruding from the end section of the component body is not wetted or sheathed with the material of the plastic matrix. In this case, a slight wetting or sheathing of the connecting section with the material of the plastic matrix can be tolerated within the scope of a tolerance that can be achieved in the manufacturing process. In particular, the connecting section is designed to be connected to a chassis element.

A chassis element is preferably connected to the connecting section of the connecting part by means of an articulated connection, in particular a ball-and-socket connection. On the one hand, the connection part is connected to the component body permanently and sufficiently firmly or in a load-bearing manner by means of the fastening section. On the other hand, the connecting section of the connecting part protruding from the component body enables the production of an in particular articulated connection with the chassis element.

According to a development, the chassis component is designed as a stabilizer and the component body is designed as a stabilizer body. The stabilizer is designed for use in a chassis of a vehicle, in particular a motor vehicle. For this purpose, the stabilizer has the stabilizer body, the stabilizer body forming a curved torsion spring. In particular, a stabilizer body is to be understood as an elongate, rod-like, rod-like and / or tube-like body. Thus, the stabilizer body can be made hollow or tubular or made of solid material. In particular, the stabilizer body is designed as a tubular rod or solid rod. Due to the curved design of the stabilizer body, it can be designed to be essentially U-shaped, C-shaped or otherwise curved. In particular, a chassis element connected to the connecting section of the connecting part by means of an articulated connection is designed as a pendulum support. The stabilizer can thus have at least one pendulum support and at least one connection part. In particular, the stabilizer has two pendulum supports and two connecting parts. A pendulum support and a connecting part can be arranged at one end of the stabilizer body. In particular, the stabilizer body has two ends facing away from and / or spaced apart, on each of which a pendulum support is arranged by means of a connection part.

According to a further embodiment, a profile strand with a profile space that is open at least on one side is used as the connecting part. In particular, fibers of the semifinished fiber product are arranged within the profile space in the arranging step. In particular, an opening in the profile space extends, preferably starting from an open end face of the connection part, in the axial direction of the profile strand or connection part. Such a profile space or such an opening results, for example, with a profile strand with a U-shaped or C-shaped cross section. The advantage here is that fibers of the semifinished fiber product not only adapt to the outer contour of the fastening section of the connection part and interact with it, but fibers of the semifinished fiber product are also arranged within the fastening section of the connection part. As a result, the strength or resilience of the connection between the connection part and the component body can be increased further. In particular, the plastic matrix penetrates the profile space in the impregnation step. The profile space is preferably completely filled by means of the plastic matrix and in particular fibers of the semifinished fiber product.

A chassis component produced according to the method according to the invention is particularly advantageous, a component body being produced from a fiber-reinforced plastic, a connecting part being connected to the component body, a fastening section of the connection part is fastened in an end section of the component body and a connection section of the connection part protrudes from the end section, the component body is formed from a semi-finished fiber product impregnated with a plastic matrix and, for fastening the fastening section in the end section, the fastening section is arranged within the semi-finished fiber product and the semi-finished fiber product with the plastic matrix is impregnated. In particular, the chassis component described here is developed in accordance with the configurations explained in connection with the method.

• 1 einen Ausschnitt einer Seitenansicht eines Faserhalbzeugs und eines Anbindungsteils zum Herstellen eines erfindungsgemäßen Fahrwerkbauteils,
• 2 einen Ausschnitt einer zweiten Seitenansicht des Faserhalbzeugs nach dem Anordnen des Anbindungsteils in einem Endabschnitt des Faserhalbzeugs zum Herstellen des erfindungsgemäßen Fahrwerkbauteils,
• 3 einen Ausschnitt einer perspektivischen Frontansicht des Faserhalbzeugs nach dem Anordnen des Anbindungsteils in einem Endabschnitt des Faserhalbzeugs gemäß 2,
• 4 einen Ausschnitt einer weiteren Seitenansicht des erfindungsgemäßen Fahrwerkbauteils mit einem mit dem Anbindungsteil verbundenen Fahrwerkelement, und
• 5 ein schematisches Ablaufdiagramm eines erfindungsgemäßen Verfahrens.

The invention is explained in more detail below with reference to the figures. Here, the same reference symbols relate to the same, similar or functionally identical components or elements. Show it:

• 1 a section of a side view of a semifinished fiber product and a connection part for producing a chassis component according to the invention,
• 2 a section of a second side view of the semifinished fiber product after the connecting part has been arranged in an end section of the semifinished fiber product for producing the chassis component according to the invention,
• 3 a section of a perspective front view of the semifinished fiber product after the connection part has been arranged in an end section of the semifinished fiber product according to FIG 2 ,
• 4th a section of a further side view of the chassis component according to the invention with a chassis element connected to the connecting part, and
• 5 a schematic flow diagram of a method according to the invention.

1 shows a detail of a side view of a semifinished fiber product 1 and a connection part 2 for producing a chassis component according to the invention. The semi-finished fiber product 1 is formed dry in this embodiment. The semi-finished fiber product 1 has a braided core that is not clearly recognizable here 3 on. Around the braided core 3 are several layers 4th braided from continuous fibers in the form of a fiber braid. For a better overview, not all layers are included 4th provided with a reference number. From the semi-finished fiber product 1 is only an end section here 5 of the semi-finished fiber product 1 shown.

One face 6th of the end section 5 is an end face 7th of the connection part 2 facing. Here is the face 7th of the connection part 2 in this exemplary embodiment open. Starting from the open face 7th of the connection part 2 an opening extends 8th in the axial direction of the connection part 2 . Over the open front 7th and the opening 8th is a profile space 9 of the connection part 2 accessible. In this exemplary embodiment, the connection part is 2 designed as a profile strand with a U-shaped cross section.

The connecting part 2 has a fastening portion 10 on. The fastening section 10 is located in the area of the semi-finished fiber product 1 facing end of the connection part 2 . In one of the semi-finished fiber products 1 facing away from the area has the connection part 2 a connecting section 11 on. The connecting section 11 is only shown here in part.

The fastening section 10 has a form-fit profile 12 on. In this exemplary embodiment, the form-fit profile is 12 by means of a wave-like surface contour of the connection part 2 in the fastening section 10 realized. Furthermore, the connection part 2 in this embodiment several form-locking elements 13 on. In this exemplary embodiment, the form-locking elements are 13 each designed as breakthroughs or holes. For the sake of clarity, not all of the form-fitting elements are included 13 provided with a reference number.

To manufacture the chassis component, the fastening section is used in an arrangement step 10 within the end section 5 of the semi-finished fiber product 1 arranged. For this purpose, the face 7th of the connection part 2 in the front 6th of the end section 5 of the semi-finished fiber product 1 inserted or introduced.

2 shows a section of a second side view of the semifinished fiber product 1 after arranging the connecting part 2 in the end section 5 of the semi-finished fiber product 1 for producing the chassis component according to the invention. Due to the arrangement of the fastening section 10 of the connection part 2 within the end section 5 of the semi-finished fiber product 1 is the fastening section 10 into the semi-finished fiber product 1 or in fibers of the semi-finished fiber product 1 of the end section 5 embedded. In this exemplary embodiment, fibers of the semifinished fiber product also arrive 1 through the open front 7th of the connection part 1 and the opening 8th in the profile space 9 inside.

3 shows a section of a perspective front view of the semifinished fiber product 1 after arranging the connecting part 2 in the end section 5 of the semi-finished fiber product 1 according to 2 . It can be seen here that the fibers of the semi-finished fiber product 1 due to the arrangement of the fastening portion 10 in the end section 5 are widened or displaced outwards. Alternatively, the braided core 2 of the semi-finished fiber product 1 before arranging the fastening section 10 in the end section 5 be widened for example by means of a mandrel.

After arranging the fastening section 10 in the end section 5 according to the 2 and 3 an impregnation step takes place in which the semi-finished fiber product 1 is impregnated with a plastic matrix. The plastic material of the plastic matrix then hardens in a hardening step. As a result, the chassis component according to the invention is formed according to the illustration below. If necessary, a post-processing step, for example mechanical processing and / or surface treatment, can follow the hardening step.

4th shows a section of a further side view of the chassis component according to the invention 14th . In this embodiment, the chassis component 14th by means of the connection part 2 with a chassis element 15th connected. Here is the chassis element 15th shown only in part. The semi-finished fiber product 1 forms together with the injected and cured Plastic matrix 16 a component body 17th . From the end section 5 of the semi-finished fiber product 1 or the component body 17th the connecting section protrudes 11 of the connection part 2 out.

In this embodiment, the chassis component 14th designed as a stabilizer. The component body is accordingly 17th as a stabilizer body forming a torsion spring 17th realized. The chassis element 15th is designed as a pendulum support. The connection part enables this 2 by means of his from the end section 5 protruding connecting section 11 the realization of a suitable connection with the chassis element 15th . In this embodiment, this is done in the connecting section 11 a cone 18th of a ball stud 19th screwed in. Here is a joint ball 20th of the ball stud 19th articulated in the chassis element 15th stored. Alternatively, other types of connection of a pendulum support or another chassis element are also possible 15th at the connecting portion 11 conceivable.

5 shows a schematic flow diagram of a method according to the invention. The process sequence is exemplified using the exemplary embodiment according to those described above 1 to 4th explained.

After the start of the method in accordance with step S10, a semi-finished fiber product is produced 1 produced according to step S11. For manufacturing the semi-finished fiber product 1 becomes the braided core 3 with several layers 4th braided with fiber braids. In every situation 4th there are at least two braiding directions, creating several fiber strands within one layer 4th are intertwined. The braided core 3 consists in this embodiment of unidirectional and extending in the axial direction of the semifinished fiber product 1 extending filaments. Alternatively, a braided core can also be used 3 made of a different material or material composition. According to a further alternative, the braided core is removed after the semi-finished fiber product has been produced. As a result, the semifinished fiber product can have a tubular shape.

Subsequent to step S11 or alternatively in parallel thereto or preceding step S12, the connection part 2 with the fastening section 10 provided. In this exemplary embodiment, the connection part is 2 formed from a metal. Furthermore, in this exemplary embodiment, the connection part 2 designed as an open profile strand with a U-shaped cross section. As an alternative to this, there are also other open or closed designs of the connecting part 2 conceivable.

According to step S13, the fastening section is arranged in an arranging step 10 in one end section 5 of the semi-finished fiber product 1 . Here, the fastening section 10 within the semi-finished fiber product 1 of the end section 5 arranged. The fibers of the semi-finished fiber product 1 fit at least partially to the interlocking profile 12 and / or the form-fit elements 13 of the fastening section 10 and cooperate with it. Furthermore, when arranging the fastening section 10 in the end section 5 Fibers of the semi-finished fiber product 1 in the profile space 9 of the fastening section 10 .

In accordance with step S14, the semi-finished fiber product is then impregnated in an impregnation step 1 with the plastic matrix 16 . The plastic matrix 16 a thermoset plastic. In the impregnation step S14, the form-fit profile 12 into the plastic matrix 16 embedded or encased by this or enclosed. At the same time, the plastic matrix penetrates 16 in the form-locking elements designed as openings 13 on. The plastic matrix then hardens 16 in a curing step. By forming the form fit between the fastening section 10 and the end section 5 is the connection part 2 fixed and immobile with and in relation to the component body 17th connected.

During the impregnation of the semi-finished fiber product 1 becomes the connecting section 11 of the connection part 2 from the plastic matrix 16 shielded. This ensures that the connecting section 11 from the component body 17th protrudes.

The chassis component thus produced can then be used 14th by means of a suitable design of the connecting section 11 with a chassis element 15th , for example a pendulum support. The method according to the invention ends with step S15.

List of reference symbols

1

Semi-finished fiber products

2

Connection part

3

Braided core

4th

location

5

End section

6

Front face of the end section

7th

Front side of the connection part

8th

opening

9

Profile space

10

Fastening section

11

Connection section

12

Form fit profile

13

Form-fit element

14th

Chassis component

15th

Undercarriage element

16

Plastic matrix

17th

Component body

18th

Cones

19th

Ball stud

20th

Joint ball

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.

Patent literature cited

• DE 102010049565 A1 [0002]

Claims (12)

Method for producing a chassis component (14) in which a component body (17) is produced from a fiber-reinforced plastic, in which a connection part (2) is connected to the component body (17), a fastening section (10) of the connection part (2) in an end section (5) of the component body (17) is attached and a connecting section (11) of the connecting part (2) protrudes from the end section (5), characterized in that the component body (17) is made from a semi-finished fiber product impregnated with a plastic matrix (16) (1) is formed, wherein in order to fasten the fastening section (10) in the end section (5), the fastening section (10) is first arranged within the semifinished fiber product (1) in an arrangement step and then the semifinished fiber product (1) with the plastic matrix in an impregnation step (16) is impregnated. Procedure according to Claim 1 , characterized in that in the arranging step the fastening section (10) of the connection part (2) is surrounded by the semi-finished fiber product (1) and / or the fastening section (10) is embedded in the semi-finished fiber product (1), in particular the fastening section (10) is coaxially surrounded and / or enclosed by the semifinished fiber product (1). Procedure according to Claim 1 or 2 , characterized in that the fastening section (10) has a form-fit profile (12) and / or at least one form-fit element (13), wherein in the impregnation step the form-fit profile (12) and / or the form-fit element (13) is embedded and / or in the plastic matrix is encased with the plastic matrix (16). Procedure according to Claim 3 , characterized in that the semifinished fiber product (1) in the arrangement step and / or in the impregnation step at least partially and in the area of the form-fit profile (12) and / or the form-fit element (13) has a form-fit profile (12) and / or form-fit element (13) ) assumes a corresponding, in particular interacting, shape, the semi-finished fiber product (1) is preferably arranged at least partially in at least one recess of the form-fit profile (12) and / or the form-fit element (13), in particular the form-fit profile (12) and / or the form-fit element (13) formed by means of a sequence of alternating depressions and elevations. Method according to one of the preceding claims, characterized in that the semi-finished fiber product (1) in the arrangement step is dry and / or as a semi-finished fiber product (1) is a braided core (3) with layers (4) of fiber fabric or braided around the braided core (3) Fiber braid is used, preferably a semi-finished fiber product (1) made of long fibers or continuous fibers is used. Method according to one of the preceding claims, characterized in that a rod-like or tubular semi-finished fiber product (1), in particular with a round, circular and / or oval cross-section, is used and in the arranging step the fastening section (10) is in an end face (6) or Tube opening of the end section (5) of the semifinished fiber product (1) is inserted or introduced. Method according to one of the preceding claims, characterized in that in the impregnation step a form fit and / or a material fit between the end section (5) of the component body (17) and the fastening section (10) of the connection part (2) is established. Method according to one of the preceding claims, characterized in that in the impregnation step the connecting section (11) is shielded by the plastic matrix (16). Method according to one of the preceding claims, characterized in that a chassis element (15) is connected to the connecting section (11) of the connecting part (2) by means of a joint connection, in particular a ball joint connection. Method according to one of the preceding claims, characterized in that the chassis component (14) is designed as a stabilizer, the component body (17) is designed as a stabilizer body, in particular a chassis element connected to the connecting section (11) of the connecting part (2) by means of an articulated connection is used (15) designed as a pendulum support. Method according to one of the preceding claims, characterized in that a profile strand with a profile space (9) open at least on one side is used as the connecting part (2), fibers of the semi-finished fiber product (1) being arranged in the arranging step within the profile space (9), in particular an opening (8) of the profile space (9) extends, preferably starting from an open end face (7) of the connecting part (2), in the axial direction of the profile strand. Chassis component manufactured according to a method according to one of the preceding claims, wherein a component body (17) is made from a fiber-reinforced plastic, a connection part (2) is connected to the component body (17), a fastening section (10) of the connection part (2) in an end portion (5) of the component body (17) is attached and a connecting portion (11) of the Connecting part (2) protrudes from the end section (5), characterized in that the component body (17) is formed from a semi-finished fiber product (1) impregnated with a plastic matrix (16) and is used to fasten the fastening section (10) in the end section (5) the fastening section (10) is arranged within the semifinished fiber product (1) and the semifinished fiber product (1) is impregnated with the plastic matrix (16).

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