Method and apparatus for manufacturing aluminum product

Patent metadata

Field	Value
Publication number	US-9878389-B2
Application number	US-201414906278-A
Country	US
Kind code	B2
Filing date	Jul 21, 2014
Priority date	Jul 26, 2013
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

A method for manufacturing an aluminum product includes a spraying step, in which a workpiece heated at a brazing step is cooled by spraying of a process liquid on the workpiece, as a boehmite treatment step after the brazing step. After the brazing step, the workpiece has been heated for brazing. A surface of the workpiece can be changed into boehmite having corrosion resistance by the spraying of the process liquid on the heated workpiece so as to contact a water molecule. Moreover, the process liquid sprayed can be dried by the heat of the workpiece. Accordingly, the brazing step, a surface treatment step and a drying step can be performed in a consecutive line.

First claim

What is claimed is:

1. A method for manufacturing an aluminum product including aluminum or aluminum alloy, the method comprising:
brazing a member including aluminum or aluminum alloy by melting a brazing filler metal attached to the member via heating of the member at a brazing temperature; and
cooling the member which has the brazing temperature due to the heating and simultaneously forming a boehmite layer on a surface of the member by spraying a process liquid on the member after the brazing and before the member heated in the brazing is cooled to ordinary temperature, wherein the process liquid includes at least one corrosion-resistant metal selected from Zr, V, and Ti, or at least one air cleaning catalyst selected from MnO 2 , CeO 2 , Fe 2 O 3 , Co 3 O 4 , NiO, Ag 2 O, Cr 2 O 3 , V 2 O 5 , CuO and MoO 3 .

2. The method for manufacturing an aluminum product, according to claim 1 , wherein the spraying is performed when a temperature of the member is at or above an evaporation temperature of the process liquid.

3. The method for manufacturing an aluminum product, according to claim 1 , wherein the process liquid includes water.

4. The method for manufacturing an aluminum product, according to claim 1 , further comprising
assembling a plurality of components to obtain the member before the brazing of the member, wherein
the aluminum product is a core portion of a heat exchanger.

5. The method for manufacturing an aluminum product, according to claim 1 , wherein
the member has a plate shape, and
the process liquid is sprayed on both sides of the member with respect to a thickness direction of the member in the spraying.

6. A method comprising:
heating a member including aluminum or an aluminum alloy to a brazing temperature;
brazing the member by melting a brazing filler metal attached to the member at the brazing temperature; and
spraying a process liquid on the member at the brazing temperature to cool the member and simultaneously form a boehmite layer on a surface of the member, the boehmite layer being formed on the surface of the member before the member is cooled to a room temperature, wherein the process liquid includes at least one corrosion-resistant metal selected from Zr, V, and Ti, or at least one air cleaning catalyst selected from MnO 2 , CeO 2 , Fe 2 O 3 , Co 3 O 4 , NiO, Ag 2 O, Cr 2 O 3 , V 2 O 5 , CuO and MoO 3 .

7. The method of claim 6 , wherein the process liquid includes water.

Assignees

• Denso Corp

Inventors

• Iijima Masahiro

Classifications

• B23K2103/10

  Aluminium or alloys thereof · CPC title

• F28F2275/04

  by brazing · CPC title

• B23K1/0012 Primary

  Brazing of heat exchangers · CPC title

• C23C22/76

  Applying the liquid by spraying · CPC title

• F28F21/084

  from aluminium or aluminium alloys · CPC title