Method for producing a motor vehicle component from aluminum

Patent metadata

Field	Value
Publication number	US-9914491-B2
Application number	US-201514683734-A
Country	US
Kind code	B2
Filing date	Apr 10, 2015
Priority date	Apr 10, 2014
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

A method for producing a motor vehicle component, is disclosed having the steps of—providing a blank composed of a 5000 grade naturally hard aluminum alloy with an initial yield strength, completely heating the blank to a forming temperature between 150° C. and 350° C., preferably between 200° C. and 300° C. in less than 20 s, preferably less than 10 s and in particular in 2 to 5 s, and performing forming in a forming tool in less than 20 s, preferably less than 10 s and in particular between 2 and 5 s, the temperature being held between 150° C. and 350° C. in at least one first region of the blank, and cooling to a temperature lower than 250° C., in particular lower than 200° C., being performed in a second region during or after the deformation.

First claim

The invention claimed is:

1. A method for producing a motor vehicle component, characterized by the following method steps:
providing a blank composed of a 5000 grade naturally hard aluminum alloy with an initial yield strength,
completely heating the blank to a forming temperature between 150° C. and 350° C. in less than 20 s
performing forming in a forming tool in less than 20 s, the temperature being held between 150° C. and 350° C. in at least one first region of the blank, and cooling to a temperature lower than 250° C. being performed in a second region during or after the forming,
generating a yield strength in at least one first region of less than 250 MPa and greater than 120 MPa and a yield strength in a second region of less than or equal to 450 MPa and greater than 200 MPa, the yield strength of the second region being at least 50 MPa greater than the yield strength of the first region.

2. The method as claimed in claim 1 , wherein the blank or component is trimmed before, during or after the forming.

3. The method as claimed in claim 1 , wherein a blank having at least two mutually different wall thicknesses is deformed.

4. The method as claimed in claim 1 , wherein the motor vehicle component is a motor vehicle pillar composed of aluminum is produced, the motor vehicle pillar being coupled to an inner reinforcement panel and/or an outer reinforcement panel.

5. The method as claimed in claim 1 , wherein the cooling is performed in less than 20 s.

6. The method as claimed in claim 1 , wherein a second cooling process is performed, at least partially to a temperature between 120° C. and 200° C.

7. The method as claimed in claim 6 , wherein the second cooling process is performed in a separate cooling tool, the second cooling process being performed in less than 20 s.

8. The method as claimed in claim 1 , wherein the blank or the motor vehicle component is subjected to surface treatment.

9. The method as claimed in claim 1 , wherein the motor vehicle component is manufactured from a blank with at least one applied patch.

10. The method as claimed in claim 1 , wherein said completely heating the blank to a forming temperature between 150° C. and 350° C. comprises heating between 200° C. and 300° C. in less than 20 s.

11. The method as claimed in claim 1 , wherein said completely heating the blank to a forming temperature between 150° C. and 350° C. comprises heating between 200° C. and 300° C. in less than 10.

12. The method as claimed in claim 1 , wherein said performing forming in a forming tool in less than 20 s comprises performing forming in less than 10 s.

13. The method as claimed in claim 1 , wherein said performing forming in a forming tool in less than 20 s comprises performing forming between 2 and 5 s.

14. The method as claimed in claim 1 , wherein the yield strength of the second region being at least 50 MPa comprises being more than 100 MPa.

15. The method as claimed in claim 4 , wherein a motor vehicle pillar is adhesively bonded to an inner reinforcement panel and/or an outer reinforcement panel.

16. The method as claimed in claim 15 , wherein the adhesive is thermally activatable.

17. The method as claimed in claim 1 , wherein the cooling is performed in less than 10 s.

18. The method as claimed in claim 6 , wherein the second cooling process is performed in a separate cooling tool, the second cooling process being performed in less than 10 s.

19. The method as claimed in claim 1 , wherein the blank or the motor vehicle component is conversion-coated.

Assignees

• Benteler Automobiltechnik Gmbh

Inventors

• Bohner Friedrich
• Doerr Jochen
• Grewe Jochem
• Hielscher Christian
• Toelle Joern
• Rauscher Boris

Classifications

• C22F1/047

  of alloys with magnesium as the next major constituent · CPC title

• B21D53/88 Primary

  other parts for vehicles, e.g. cowlings, mudguards · CPC title

• B62D29/008 Primary

  predominantly of light alloys, e.g. extruded · CPC title

• C22C21/08

  with silicon · CPC title

• B21D22/022

  by heating the blank or stamping associated with heat treatment (C21D takes precedence) · CPC title