DE102015222298B4 - Method for producing a chassis component - Google Patents

Abstract

Method for producing a chassis component, in particular a steering wheel for a wheel or axle suspension of a vehicle, comprising the following steps: producing a supporting body (1) provided with holes (8), providing fibers (12) in the form of slivers, adhering the fibers ( 12) on the supporting body (1), introducing the carrying body (1) provided with the applied fibers (12) into a cavity (14) of a casting tool (15), filling the carrying body (1) provided with the applied fibers (12). receiving cavity (14) with a casting material (19), which flows through the holes (8) of the support body (1), curing the casting compound (19) to a casting (1) provided with the applied fibers (12) comprising cast part (20 ) and removing the casting (20) from the casting tool (15).

Description

The invention relates to a method for producing a chassis component, in particular a handlebar for a wheel or axle suspension of a vehicle.

Suspension components are currently mainly made of metal. For weight reduction but also increasingly thermoplastics and thermosets are used as weight-optimized solutions. However, these weight-optimized solutions are sometimes very expensive and / or do not meet the strength requirements.

The post-published DE 102014 214 827 A1 describes a method for producing a handlebar for a motor vehicle, which is formed essentially from a fiber-plastic composite structure, wherein a preform structure is created with load-adapted fiber orientation, the preform structure is introduced into a forming tool, the preform Structure is consolidated in the tool by supplying pressure and / or temperature and the handlebar is removed and further processed.

From the DE 10 2009 040 587 A1 is a disc carrier for a multi-plate clutch or a related method known. The disk carrier has an annular peripheral portion with a plurality of apertures, which serve to connect a fiber-reinforced material with a peripheral part.

In the current state of the art, carbon fiber ribbons are sewn to a glass fiber scrim. This compound is then placed in a tool mold, after which the mold is filled with a duromer material. The sewn carbon fiber ribbon glass fiber joint compound is a high cost. The carbon fibers are needed for increasing the structural strength, with the glass fibers serving as a substrate. Further, one or more metal bushings are used as an insert prior to filling the cavity with the duromer. However, the contact of the metal bush with the carbon fibers causes a contact corrosion with the known consequences.

Proceeding from this, the invention has the object to be able to reduce the cost of producing a chassis component.

This object is achieved by a method according to claim 1. Preferred developments of the invention are given in the subclaims and in the following description.

The method for producing a chassis component comprises in particular the method steps: producing a perforated support body, providing fibers in the form of slivers, adhering the fibers to the support body, introducing the provided with the applied fibers support body in a cavity of a casting tool, filling the With the applied fibers receiving body receiving cavity with a casting material which flows through the holes of the support body, curing the casting material to a casting provided with the applied fibers comprising the casting and removing the casting from the casting tool.

The production of the support body with the glued fibers is in particular less expensive than the production of a sewn carbon fiber-glass-fiber-bonded joint, so that the costs for the production of the chassis component can be reduced.

The support body is vorzuzugsweise preferably rigid and / or dimensionally stable and / or is or preferably forms a rigid and / or dimensionally stable body. The cured casting material is vorzuzugsweise preferably rigid and / or dimensionally stable and / or is or preferably forms a rigid and / or dimensionally stable body. The casting is preferably rigid and / or dimensionally stable and / or is or preferably forms a rigid and / or dimensionally stable body. Advantageously, when filling the cavity with the casting compound of the provided with the applied fibers support body is also flowed around by the casting material.

The filling of the provided with the applied fibers supporting body cavity with the casting material is particularly referred to as casting. The support body to which the fibers are applied prior to casting preferably serves to hold the fibers in place during casting. Preferably, the cavity is filled with the casting compound under pressure and heat. Advantageously, pressure and heat supply, especially temporarily, even after filling the cavity with the casting material maintained, for example, until the casting material has cured or almost cured. The pressure is in particular high pressure. Preferably, the casting compound is injected into the cavity. For example, the cavity is filled with the casting compound by injection molding.

The application of the fibers to the support body is adhering the fibers to the support body. Thus, the fibers are adhered to the outer surface of the support body.

The support body can be made flat or substantially flat, for example. Further, the support body, in particular in cross-section, for example, channel-shaped, box-shaped, cup-shaped, U-shaped or V-shaped can be produced. Preferably, the support body is produced as a hollow body or at least partially as a hollow body.

According to a development, at least two carrier body parts are produced and preferably assembled to form the carrier body for producing the carrier body. The support body parts are provided in particular with holes or holes. Preferably, the support body parts are each provided with holes or with a part of the holes of the support body. Advantageously, the support body parts or at least one of the support body parts, in particular in cross-section, channel-shaped, box-shaped, cup-shaped, U-shaped or V-shaped produced. Additionally or alternatively, for example, the support body parts or is at least one or another of the support body parts made flat or substantially planar. Advantageously, the support body parts are manufactured as equal parts. Thus, the production cost can be reduced.

Preferably, the support body parts in the assembled state define a cavity and / or include the or a cavity. As a result, the support body is particularly easy to produce as a hollow body. Advantageously, the support body parts, in particular when they are channel-shaped, box-shaped, cup-shaped, U-shaped or V-shaped in cross-section, each have a back and at least one or more projecting from this leg, which preferably project in the same direction from the back. Preferably, the support body parts are assembled such that the one or more limbs of each support body part are facing the respective other support body part. In particular, the support body parts are assembled such that the legs of each support body on the legs of the other support body, preferably the front side, rest. The sticking of the fibers to the support body is or in particular involves gluing the fibers onto the support body parts, preferably onto the outer surfaces of the support body parts.

When assembling the support body parts they are preferably positively and / or materially connected to each other. For example, the support body parts, in particular during their assembly, clipped together. Additionally or alternatively, the support body parts, in particular during their assembly, e.g. glued or welded together. Preferably, the support body parts are each provided with at least one snap element in their manufacture. In particular, when assembling the carrier body parts, the snap element of one of the carrier body parts snaps into one another with the snap element of another of the carrier body parts.

The support body is produced in particular from a duromer. Preferably, the support body parts are made of or each of a duromer. As a duromer, here is e.g. a polyurethane or a synthetic resin, e.g. used an epoxy resin. For example, the support body is produced by injection molding. Advantageously, the support body parts are manufactured in or by injection molding. The carrier body and / or the carrier body parts in particular each form a semi-finished product. Because of the holes, the support body may e.g. Also referred to as a support grid.

Accordingly, the support body parts may e.g. Also referred to as support grid parts.

As or for the casting compound, a thermoset is preferably used. In particular, a non-crosslinked or only partially crosslinked thermoset is used as or for the casting compound. As a duromer, here is e.g. a polyurethane or a synthetic resin, e.g. used an epoxy resin.

The same or the same material, preferably the same or the same plastic material, in particular the same or the same duromer, is preferably used for the casting compound and for the carrier body and / or the carrier body parts. Thus, e.g. a material connection between the, in particular cured, casting compound and the support body and / or the carrier body parts can be achieved.

As fibers, e.g. Glass fibers are used. However, carbon fibers are preferably used as fibers.

The fibers may e.g. be glued directly to the support body and / or the support body parts, in particular on the outer surfaces of the support body and / or the support body parts. According to one embodiment, the fibers are provided in the form of fiber ribbons (fiber tapes) which, preferably directly, are adhered to the support body and / or the support body parts, in particular to the outer surfaces of the support body and / or the support body parts. The application of the fibers is thus carried out by sticking the slivers.

According to one embodiment, at least one insert part is arranged between the carrier body parts and / or introduced into the cavity before the introduction of the carrier body into the cavity and / or before the filling of the cavity with the casting compound. The insert is made in particular of metal and / or the insert is made in particular of metal. Preferably, the insert is by the support body and / or the support body parts in Kept distance to the fibers. Thus, contact corrosion between the insert and the fibers can be avoided. Preferably, the insert is held by the support body and / or the support body parts in the cavity of the casting tool. Without the support body, the insert would have to be held for example by pins in the tool, so that the insert can not be completely enclosed by the casting material and thus exposed to the risk of corrosion.

Preferably, the support body parts, in particular in each case, are produced with at least one curved and / or partially cylindrical or cylindrical area region. Advantageously, the insert is at least partially enclosed by the one or more curved and / or partially cylindrical surface areas. In particular, the insert part is arranged between the curved and / or partially cylindrical surface regions of the carrier body parts, so that the insert part, in particular completely or at least partially, is enclosed by the curved and / or partially cylindrical surface regions of the carrier body parts. The insert is or will be e.g. manufactured as cup-shaped and / or sleeve-shaped and / or round and / or cylindrical and / or hollow cylindrical body. For example, the insert is a metal bushing.

According to a development, an elastomer bearing is introduced into the insert. The elastomeric bearing has, in particular, an inner part and an elastomeric bearing body which surrounds it and is connected to the inner part. In particular, the elastomeric bearing body is introduced together with the inner part in the insert. Preferably, the elastomeric bearing body bears against the inner peripheral surface of the metal bushing.

According to one embodiment, the casting already forms the or a chassis component. Additionally or alternatively, the cast part after its removal from the casting tool, in particular to the chassis component, further processed. The chassis component is e.g. a chassis component, a structural component, a steering component. Preferably, the chassis component is a handlebar for a wheel or axle suspension of a vehicle. In particular, the handlebar is a two-point link or a multipoint link, such as a multi-point link. a three-point or a four-point link. The chassis component is advantageously installed in a wheel suspension or axle suspension of a vehicle. For example, the inner part of the elastomeric bearing is connected to a vehicle body or a wheel carrier. The vehicle is in particular a motor vehicle.

According to one embodiment, the fiber ribbons (fiber tapes) adhered to the carrier body are carbon fiber ribbons (carbon fiber tapes). The support body preferably consists of a duromer and is in particular thin-walled. This support body preferably serves only as a carrier material for the fibers or fiber ribbons. For hollow-walled chassis components, the support body parts can be clipped together, for example, to the support body. When filling the cavity with the casting compound, which preferably consists of a duromer, the supporting body is in particular flowed around and through the bonded fiber tapes. The fibers are held by the support body in position. Carrier fiberglass bonding is particularly less expensive than a sewn carbon fiberglass-fiberglass joint. Furthermore, a further cost advantage is guaranteed by a better automation option. By the support body and / or by the support body parts, the fibers of the one or more inserts, which consist in particular of metal, can be isolated. As a result, a contact corrosion can be avoided.

According to one embodiment, at least one additional insert part is embedded in the chassis component and / or integrated, wherein the additional insert part is in particular made of metal and / or consists. The additional insert serves e.g. to increase the strength of the chassis component. For example, before introducing the carrier body into the cavity and / or before filling the cavity with the casting compound, the at least one additional insert part is arranged between the carrier body parts and / or introduced into the cavity. Advantageously, the additional insert is held by the support body and / or the support body parts at a distance from the fibers. Furthermore, the additional insert is preferably held by the support body and / or the support body parts in the cavity of the casting tool. The additional insert is e.g. a metal bush.

By filling the cavity with the casting compound, the fibers and / or the carrier body and / or the carrier body parts and / or the at least one insert part and / or the at least one additional insert part are embedded in the casting compound. By curing the casting compound, the fibers and / or the support body and / or the support body parts and / or the at least one insert and / or the at least one additional insert firmly, in particular form-fitting and / or materially bonded, connected to the cured casting.

There are many possibilities for applications on the chassis component. For example, screw passages and / or cable bushings can be provided in the chassis component.

• 1 eine perspektivische Darstellung eines Tragkörpers,
• 2 eine perspektivische Darstellung des Tragkörpers mit aufgeklebten Fasern,
• 3 eine schematische Schnittansicht eines Gusswerkzeugs nach Einlegen des mit den Fasern versehenen Tragkörpers in eine Kavität des Gusswerkzeugs,
• 4 die Ansicht nach 3 nach Einfüllen einer Gussmasse in die Kavität und
• 5 eine Seitenansicht des umgossenen Tragkörpers mit einem eingesetzten Elastomerlager.

The invention will be described below with reference to a preferred embodiment with reference to the drawing. In the drawing show:

• 1 a perspective view of a supporting body,
• 2 a perspective view of the support body with glued fibers,
• 3 a schematic sectional view of a casting tool after inserting the fiber-containing support body in a cavity of the casting tool,
• 4 the view after 3 after pouring a casting compound into the cavity and
• 5 a side view of the encapsulated support body with an inserted elastomeric bearing.

Out 1 is a perspective view of a support body 1 apparent, consisting of two carrier parts 2 and 3 is composed. The carrier parts 2 and 3 are each made of a duromer and have in a strut section 4 a U-shaped cross section, wherein the legs 5 and 6 the U-shaped cross sections are facing each other and abut each other. Here are the thighs 5 the carrier body part 2 and the thighs 6 the carrier body part 3 assigned. The carrier parts 2 and 3 thus limit a cavity 7 passing through in the carrier body parts 2 and 3 provided holes 8th is accessible.

Furthermore, the support body parts 2 and 3 in a warehouse section 9 each a part-cylindrical surface area 10 on, wherein the part-cylindrical surface areas 10 the two supporting body parts 2 and 3 To complement a bearing eye, in which a cylindrical metal bushing 11 is used.

On the outer surfaces of the body parts 2 and 3 become carbon fibers twelve glued on, what made 2 is apparent. The carbon fibers twelve may be in the form of carbon fiber ribbons on the outer surfaces of the support body parts 2 and 3 glued on. Furthermore, the two support body parts 2 and 3 by means of at least one Verklipsung 13 clipped together and thus positively connected with each other.

The from the interconnected carrier parts 2 and 3 compound and with the carbon fibers twelve pasted supporting body 1 gets into the cavity 14 a casting tool 15 put what's out 3 is apparent. The casting tool 15 is from a tool base 16 and one of this removable tool shell 17 assembled, passing through an opening 18 a casting compound consisting of a duromer 19 into the cavity 14 is filled. The casting mass 19 encloses the support body 1 and further passes through the holes 8th through into the cavity 7 and fill it out, what's out 4 is apparent.

After curing the casting compound 19 forms the cast together with the fibers supporting body a casting 20 , which in side view from 5 is apparent. The casting 20 forms a suspension component, in the metal bushing 11 an elastomeric bearing 21 is introduced, which is an inner part 22 and a surrounding elastomeric bearing body 23 that is in the metal bushing 11 sitting. The elastomeric bearing 21 can either before casting or after hardening of the casting material in the metal bushing 11 be introduced. The hardened casting compound is in 5 with the reference number 24 characterized.

LIST OF REFERENCE NUMBERS

1

supporting body

2

Beam member

3

Beam member

4

strut portion

5

leg

6

leg

7

cavity

8th

hole

9

bearing section

10

part-cylindrical surface area

11

metal bushing

12

Carbon fibers

13

Verklipsung

14

cavity

15

casting tool

16

Tool part

17

Upper die

18

Opening in the casting tool

19

Sealing compound

20

casting

21

elastomeric bearings

22

Inner part of the elastomer bearing

23

elastomeric bearing body

24

hardened casting compound

Claims (12)

Method for producing a chassis component, in particular a handlebar for a wheel or Axle suspension of a vehicle, comprising the steps of: producing a supporting body (1) provided with holes (8), providing fibers (12) in the form of fiber ribbons, adhering the fibers (12) to the supporting body (1), introducing the one applied thereto Fibers (12) provided supporting body (1) in a cavity (14) of a casting tool (15), filling the provided with the applied fibers (12) supporting body (1) receiving cavity (14) with a casting material (19), which Holes (8) of the support body (1) flows through, hardening of the casting compound (19) to a casting (20) comprising the fibers (12) provided with the applied fibers (12) and removal of the casting (20) from the casting tool (15). , Method according to Claim 1 , characterized in that the supporting body (1) is at least partially produced as a hollow body. Method according to Claim 1 or 2 , characterized in that for producing the supporting body (1) at least two carrier body parts (2, 3) are produced and assembled to the support body (1). Method according to Claim 3 , characterized in that for the manufacture of the supporting body (1) the supporting body parts (2, 3) are clipped together. Method according to one of Claims 3 to 4 , characterized in that prior to the introduction of the support body (1) in the cavity (14) at least one insert part (11) between the support body parts (2, 3) is arranged. Method according to Claim 5 , characterized in that the insert part (11) is held by the carrier body parts (2, 3) at a distance from the fibers (12). Method according to Claim 5 or 6 characterized in that the carrier body parts (2, 3) are each manufactured with at least one curved surface region (10), wherein the insert part (11) is produced as a cylindrical or hollow cylindrical body and between the curved surface regions (10) of the carrier body parts (2, 3 ) is arranged, so that the insert part (11) is at least partially enclosed by the curved surface regions (10). Method according to one of Claims 5 to 7 , characterized in that the insert part (11) is made of metal. Method according to one of the preceding claims, characterized in that the support body (1) and / or the support body parts (2, 3) are each made of a duromer. Method according to one of the preceding claims, characterized in that a duromer is used as the casting compound (19). Method according to one of the preceding claims, characterized in that the same plastic material is used for the casting compound (19) and for the support body (1) or the support body parts (2, 3). Method according to one of the preceding claims, characterized in that carbon fibers are used as fibers (12).

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