Method for producing a component made of a fiber-reinforced plastic

Patent metadata

Field	Value
Publication number	US-12285902-B2
Application number	US-202118273955-A
Country	US
Kind code	B2
Filing date	Dec 9, 2021
Priority date	Jan 28, 2021
Publication date	Apr 29, 2025
Grant date	Apr 29, 2025

Abstract

A method for producing a structural component part ( 1 ) from a fiber-reinforced plastic according to a three-dimensional winding process. Threadlike or strand-shaped fiber material ( 12 ) supplied on at least one bobbin ( 18 ) is wound around at least one filament carrier ( 11 ) in at least one winding pattern by at least one computer-controlled winding device ( 10 ). The fiber material ( 12 ) is laid down on the filament carrier ( 11 ) with a filament tensile force (F ZN ) that is preadjusted by a control device ( 14 ). The filament tensile force (F Zist ) is controlled depending on location and/or depending on path in order to take into account specific lay-down locations ( 29 ) on the filament carrier ( 11 ) in which a lay-down path ( 28 ) predefined by the winding pattern is departed from owing to the local geometry at preadjusted filament tensile force (F ZN ).

First claim

The invention claimed is:

1. A method for producing a structural component part from a fiber-reinforced plastic according to a three-dimensional winding process, wherein threadlike or strand-shaped fiber material which is supplied on at least one bobbin is wound around at least one filament carrier in at least one winding pattern by means of at least one computer-controlled winding device, wherein the fiber material is laid down on the filament carrier with a filament tensile force (FZN) that is preadjusted by a control device, wherein the filament tensile force (FZist) is controlled depending on location and/or depending on path to take into account specific lay-down locations on the filament carrier in which a lay-down path predefined by the winding pattern is departed from owing to the local geometry at preadjusted filament tensile force (FZN).

2. The method according to claim 1 , wherein the preadjusted filament tensile force (FZN) is increased to a predefinable maximum tensile force (FZmax) before such a specific lay-down location is reached and is decreased to a predefinable minimum tensile force (FZmin) immediately after passing the specific lay-down location for covering a lay-down distance, after which the filament tensile force (FZist) is increased again to the preadjusted filament tensile force (FZN).

3. The method according to claim 2 , wherein the covered lay-down distance over which the fiber material is laid down with minimum tensile force (FZmin) is determined depending on the adhesive properties of the fiber material.

4. The method according to claim 2 , wherein the length of the lay-down distance is selected in such a way that the fiber material is prevented from aligning with the geodesic line in the region of the specific lay-down location.

5. The method according to claim 1 , wherein the respective change in the filament tensile force (FZist) follows a ramp-shaped course.

6. The method according to claim 1 , whthe preadjusted filament tensile force (FZN) is varied depending on different winding patterns formed during the winding process.

7. The method according to claim 1 , wherein geometric qualities of the filament carrier and/or geometric features formed on the filament carrier during the winding process which are brought about or originate through change of direction within the winding pattern and/or through deflections due to the geometry of the filament carrier and/or through overlapping areas of a plurality of directions of windings as the fiber material is laid down are accounted for as specific lay-down locations.

8. The method according to claim 1 , wherein the filament tensile force (FZist) is controlled depending on a local lay-down angle and/or on a laminate thickness achieved during the winding process.

9. The method according to claim 1 , wherein towpreg is used as fiber material.

10. A computer-controlled winding device for producing a structural component part from a fiber-reinforced plastic according to a three-dimensional winding process, wherein the computer-controlled winding device is adapted to wind a threadlike or strand-shaped fiber material supplied on at least one bobbin around a filament carrier according to at least one predefinable winding pattern with a filament tensile force (FZist), wherein the winding device is adapted to lay down the fiber material on the filament carrier with a filament tensile force (FZN) preadjusted by a control device, wherein the winding device is controlled to adjust the filament tensile force (FZist) depending on location and/or depending on path to take into account specific lay-down locations on the filament carrier in which a lay-down path predefined by the winding pattern is departed from because of the local geometry at preadjusted filament tensile force (FZN).

11. The computer-controlled winding device according to claim 10 , wherein the control device has a storage unit in which winding patterns are storable and a computing unit for controlling the winding device.

12. The computer-controlled winding device according to claim 10 , wherein the control device is configured to determine the specific lay-down locations depending on the geometry of the filament carrier to be wrapped and depending on the at least one winding pattern to be used in order to adapt the filament tensile force (FZN) in a location-dependent pattern.

13. The computer-controlled winding device according to claim 10 , wherein the control device is adapted to increase the preadjusted filament tensile force (FZN) to a predefinable maximum tensile force (FZmax) before such a specific lay-down location is reached and to decrease the preadjusted filament tensile force (FZN) to a predefinable minimum tensile force (FZmin) immediately after passing the specific lay-down location for covering a lay-down distance, after which the filament tensile force (FZist) is increased again to the preadjusted filament tensile force (FZN).

14. The computer-controlled winding device according to claim 10 , wherein at least one apparatus is provided for adjusting and maintaining the respective adjusted filament tensile force (FZN, FZmax, FZmin).

15. The computer-controlled winding device according to claim 14 , wherein the at least one apparatus comprises at least one electronically controlled drive motor which drives the at least one bobbin.

16. The computer-controlled winding device according to claim 14 , wherein the at least one apparatus has at least one sensor unit for continuous detection of the filament tensile force (FZist).

17. The computer-controlled winding device according to claim 10 , wherein the structural component part is constructed as a multipoint link for a chassis of a motor vehicle or utility vehicle.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Müller Ingolf
• Grabowski Erik
• Stieglitz Andre

Classifications

• B29K2105/10

  Cords, strands or rovings, e.g.} oriented {cords, strands or rovings · CPC title

• B29K2021/006

  Thermosetting elastomers · CPC title

• B29C2053/8025

  tensioning · CPC title

• B29C70/382

  Automated fiber placement [AFP] · CPC title

• B29C53/8016

  Storing, feeding or applying winding materials, e.g. reels, thread guides, tensioners · CPC title