Method for producing a roll-clad aluminum workpiece, roll-clad aluminum workpiece, and use therefor

Patent metadata

Field	Value
Publication number	US-10065271-B2
Application number	US-201514850612-A
Country	US
Kind code	B2
Filing date	Sep 10, 2015
Priority date	Mar 19, 2013
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A method for producing a roll-clad aluminum workpiece and an associated roll-clad aluminum workpiece are provided, wherein a core ingot is produced from an aluminum alloy and at least one cladding piece is produced from a cladding material, wherein at least one groove is introduced into the core ingot and/or into a layer applied to the core ingot, wherein the cladding piece is inserted into the groove, and wherein the core ingot is hot-rolled after the cladding piece has been inserted, the width of the groove being equal to or less than the core ingot width. A use of such a roll-clad aluminum workpiece is also provided for producing a soldered workpiece, in particular a folding tube.

First claim

The invention claimed is:

1. A method of producing a folded tube from a roll-clad aluminum workpiece, in which a core ingot of an aluminum alloy and at least one cladding piece of a cladding material are provided, in which at least one groove is incorporated into the core ingot and/or into a layer which may have been applied to the core ingot, in which the cladding piece is inlayed into the groove, in which the core ingot, after inlaying of the cladding piece, is hot-rolled to produce a roll-clad aluminum workpiece, and in which the roll-clad aluminum workpiece is folded such that the at least one cladding piece forms a joint section with another region of the roll-clad aluminum workpiece so as to form the folded tube, wherein the width of the groove is equal to or less than 70% of the core ingot width, and wherein the cladding piece is composed of a brazing alloy.

2. The method according to claim 1 , wherein the at least one cladding piece has a width equal to or less than 50% of the core ingot width.

3. The method according to claim 1 , wherein the cladding piece is composed of an alloy of the type AA 4xxx.

4. The method according to claim 1 , wherein the cladding piece is adapted so as to exactly fit the shape of the groove.

5. The method according to claim 1 , wherein the cladding piece which is inlayed into the groove is spaced apart from the longitudinal edges of the core ingot.

6. The method according to claim 1 , in which a first cladding piece of a cladding material and a second cladding piece of a cladding material are provided, in which at least one first groove is incorporated into the core ingot and/or into a layer which may have been applied to the core ingot, in which the first cladding piece is inlayed into the first groove, in which the second cladding piece is inlayed into the first or into a second groove which is incorporated into the core ingot and/or into a layer which may have been applied to the core ingot, and in which the core ingot, after inlaying of the first and second cladding piece, is hot-rolled.

7. The method according to claim 6 , wherein the first cladding piece is composed of a first cladding material, and the second cladding piece is composed of a second cladding material which is different from the first cladding material.

8. The method according to claim 6 , wherein the first cladding piece has a first thickness, and the second cladding piece has a second thickness which is different from the first thickness.

9. A method, comprising the steps of:
producing a folded tube from a roll-clad aluminum workpiece, the roll-clad aluminum workpiece having a core of an aluminum alloy, and having at least one cladding layer of a cladding material on one side of the aluminum workpiece, the at least one cladding layer configured to form a joint section with another portion of the roll-clad aluminum workpiece when the roll-clad aluminum workpiece is folded into a folded tube, wherein the cladding layer extends across only a part-region of the side of the aluminum workpiece wherein the part-region occupies at maximum 70% of the entire area of the side, and that the cladding layer is composed of a brazing alloy.

10. The method according to claim 9 , wherein the part-region of the side of the aluminum workpiece, across which the at least one cladding layer of the aluminum workpiece extends, has a size equal to or less than 50% of the entire area of the side of the aluminum workpiece.

11. The method according to claim 9 , wherein the cladding layer is composed of an alloy of the type AA 4xxx.

12. The method according to claim 9 , wherein the aluminum workpiece has at least one brazing point for brazing the aluminum workpiece, that the cladding layer is a brazing cladding layer, and that the part-region, across which the cladding layer extends, is adapted to the location of the at least one brazing point.

13. The method according to claim 9 , wherein the aluminum workpiece on one side has a first cladding layer of a cladding material, and a second cladding layer of a cladding material, and that the first cladding layer extends only across a first part-region, and the second cladding layer extends only across a second part-region of the side of the aluminum workpiece.

14. The method according to claim 13 , wherein the first cladding layer is composed of a first cladding material, and the second cladding layer is composed of a second cladding material which is different from the first cladding material.

15. The method according to claim 1 , wherein the at least one cladding piece has a width equal to or less than 25% of the core ingot width.

16. The method according to claim 1 , wherein the cladding piece which is inlayed into the groove is spaced at least 2 cm apart from the longitudinal edges of the core ingot.

17. The method according to claim 9 , wherein the part-region of the side of the aluminum workpiece, across which the at least one cladding layer of the aluminum workpiece extends, has a size equal to or less than 25% of the entire area of the side of the aluminum workpiece.

18. A folded tube, comprising a roll-clad aluminum workpiece having a core of an aluminum alloy, and having at least one cladding layer of a cladding material on one side of the aluminum workpiece, the at least one cladding layer forming a joint section with another portion of the roll-clad aluminum workpiece, wherein the cladding layer extends across only a part-region of the side of the aluminum workpiece wherein the part-region occupies at maximum 70% of the entire area of the side, and that the cladding layer is composed of a brazing alloy.

Assignees

• Mrotzek Manfred
• Lansing Marcel
• Hydro Aluminium Rolled Prod

Inventors

• Mrotzek Manfred
• Lansing Marcel

Classifications

• B23K35/0238

  layered · CPC title

• B23K35/286

  Al as the principal constituent · CPC title

• B23K20/04

  by means of a rolling mill · CPC title

• B23K1/0008

  specially adapted for particular articles or work · CPC title

• F28D1/0391

  a single plate being bent to form one or more conduits · CPC title