Body structural element and method for producing a body structural element

Patent metadata

Field	Value
Publication number	US-9630654-B2
Application number	US-201514801365-A
Country	US
Kind code	B2
Filing date	Jul 16, 2015
Priority date	Jan 17, 2013
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A method for producing a body structural element, which can be a roof bow for a motor vehicle, consists of a main body made of fibre-reinforced plastic and a metal connection part. In one or more embodiments, the method includes preparing the metal connection part, preparing a fiber-plastic matrix semifinished product from a duromer resin system and carbon fibers, and overlapping the metal connection part and the fiber-plastic matrix semifinished product in a compression mold. In certain embodiments, the method further includes compressing the metal connection part with the fiber-plastic matrix semifinished product until a fiber-plastic matrix molding material penetrates into undercuts of the metal connection part, and then curing the fiber-plastic matrix semifinished product to form the main body made of fiber-reinforced plastic, wherein the main body is connected in a form-fitting manner to the metal connection part.

First claim

What is claimed is:

1. A method for producing a body structural element having a main body made of fiber-reinforced plastic and a metal connection part for a motor vehicle, wherein the method comprises the acts of:
preparing the metal connection part;
preparing a fiber-plastic matrix semifinished product from a duromer resin system and carbon fibers;
overlapping the metal connection part and the fiber-plastic matrix semifinished product in a compression mold;
compressing the metal connection part with the fiber-plastic matrix semifinished product until a fiber-plastic matrix molding material penetrates into undercuts of the metal connection part; and
curing the fiber-plastic matrix semifinished product to form the main body made of fiber-reinforced plastic, wherein the main body is connected in a form-fitting manner to the metal connection part.

2. The method according to claim 1 , wherein said curing comprises heating the compression mold.

3. The method according to claim 1 , wherein said overlapping comprises positioning the metal connection part in the compression mold overlapping between two pre-impregnated fiber-plastic matrix semifinished products.

4. The method according to claim 1 , wherein preparing the metal connection part comprises coating the metal connection part by means of a cathodic immersion process to form at least one of an electrically insulating layer and a layer to promote adhesion in an overlapping area between the metal connection part and the main body.

5. The method according to claim 1 , wherein preparing the metal connection part comprises introducing through holes in an overlapping area of the metal connection part which form undercuts of the metal connection part.

6. The method according to claim 1 , wherein the fiber-plastic matrix semifinished product comprises a duromer resin system comprised of an unsaturated polyester resin and one of a carbon fiber sheet molding compound and a carbon fiber bulk molding compound.

7. A body structural element, produced in accordance with the method of claim 1 , the body structural element comprising a main body made of fiber-reinforced plastic and at least one metal connection part connected to the main body in a form-fitting manner, wherein the metal connection part has undercuts into which the main body engages.

8. The body structural element according to claim 7 , wherein the main body is a profiled support element which comprises a metal connection part in particular at each end.

9. The body structural element according to claim 7 , wherein the main body comprises a U-profile or a plurality of U-profiles that are connected to one another.

10. The body structural element according to claim 7 , wherein the metal connection part is a profiled metal sheet made of steel or aluminum.

11. The body structural element according to claim 7 , wherein an overlapping area of the metal connection part comprises essentially vertical walls and essentially horizontal walls, and wherein through holes are formed in the vertical walls and/or in the horizontal walls.

12. The body structural element according to claim 7 , wherein the body structural element is configured to connect, by means of the metal connection part, to at least one of a body structure made of metal and to a body gate made of metal, and wherein the body structural element is further configured to at least one of stiffen the body structure, stiffen the body gate, increase a strength of the body structure, and increase a strength of the body gate.

13. The body structural element according to claim 7 , wherein the body structural element is a roof bow.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Conze Michael

Classifications

• B29C70/465

  and impregnating by melting a solid material, e.g. sheets, powders of fibres · CPC title

• B29K2033/04

  Polymers of esters · CPC title

• B29C70/76

  Moulding on edges or extremities of the preformed part · CPC title

• B62D29/004

  the metal being over-moulded by the synthetic material, e.g. in a mould · CPC title

• B29K2105/0872

  Prepregs · CPC title