JPS5950981A - Manufacture of one face bulged roll bond panel - Google Patents

Abstract

PURPOSE:To prevent the bulge by bringing the other metallic plate to age hardening, and to control easily a temperature at the time of annealing, by placing the other metallic plate containing a specified component, on the other side of one metallic plate to be bulged, annealing them, and thereafter, executing the aging treatment, when manufacturing a one face bulge roll bond panel. CONSTITUTION:An aluminum alloy containing 3.5-4.5% zinc and 0.2-0.5% magnesium by a weight ratio is used for the other metallic plate 2. Subsequently, one metallic plate 1 and the other metallic plate 2 are welded with pressure by interposing a pressure welding preventive agent in a prescribed state, by which a clad plate 3 is formed. Subsequently, the clad plate is annealed, and thereafter, is made to remain as it is, and al aluminum alloy plate used for the other metallic plate 2 is brought to age hardening. Subsequently, a bulge part 4 is formed on one metallic plate 1 by leading fluid pressure into a non-pressure welding part of the clad plate 3. In this regard, as for the aluminum alloy plate 2, in case when content of zinc and magnesium is less than the lower limit, the strength does not increase. Also, when magnesium exceeds the upper limit, pressure welding failure is generated, and when zinc exceeds the upper limit, corrosion resistance is deteriorated.

Description

[Detailed description of the invention] This invention is a single-sided bulging roll φ having a bulging portion only on one side.
Concerning the manufacturing method of Bond fist panels.

A typical roll bond panel has bulges on both sides, but it is also required that only the negative side be flat.

For example, in the case of a freezer evaporator, this is required for the following reasons.

(() To increase the area of contact with the object to be frozen to increase the freezing effect. (b) To prevent the defrosting tool from getting caught in the swelling part 1i!j and damaging the evaporator when removing sardines. (c) To facilitate drainage and cleaning after defrosting, and to avoid remaining layers of foreign matter. (d) To improve aesthetics.

To ensure easy and reliable surface treatment of Gl→evaporated lake.

In order to meet the above requirements, single-sided bulge roll bond panels have traditionally been manufactured using a method such as shaving. That is, Al100 is coated with an anti-crimping agent in a predetermined form.
A first metal plate made of A3003 and a second metal plate made of A3003 are superimposed, and the superimposed product is hot rolled, followed by cold rolling to bond the two metal plates together, higher than the recrystallization humidity of the first metal plate and
The first metal plate was annealed at a temperature lower than the recrystallization temperature of the metal plate, and fluid pressure was introduced into the non-1 [171 part] to bulge only the first metal plate side. However, Al100 and A
:3003, so there was a problem that the 'L1 [extended version] warped toward the second metal plate.

Furthermore, since the difference in jlr crystal temperature between Al100 and A3003 is small, it is necessary to perform extremely strict temperature control in order to anneal only Al100, which has been difficult to manage.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a manufacturing method that can easily manufacture a single-sided bulged roll bond panel whose negative side is completely flat.

The manufacturing method of the present invention involves crimping a first metal plate and a second metal plate by interposing an anti-crimping agent in a predetermined form, and introducing fluid pressure into the non-crimped portions of the two metal plates. One-sided bulging roll/bond/roll that bulges only on one side.
In the panel manufacturing method, zinc 3 is used as the other metal plate.
5-4.5 wt%, magnesium 0.2-0.5 w
The method is characterized in that an aluminum alloy plate containing t% is used and an aging treatment is performed between the annealing process and the swelling process.

In the above, as one of the first metal plate and the second metal plate, for example, Al100, A
An aluminum plate made of pure aluminum such as 1050 is used.

In the above, zinc and magnesium have the property of increasing the strength of the aluminum alloy by age hardening it after annealing the aluminum alloy by incorporating them into the aluminum. However, the zinc content is 3.5~νt
%, magnesium content) and is less than 0.2 wj%, no strength-increasing effect due to aging can be expected. Furthermore, if the zinc content exceeds 4.5 to 5% by weight, the corrosion resistance of the alloy will deteriorate, and the magnesium content will decrease by 0.5 wt%.
If it exceeds 1.1%, poor adhesion will occur between the plate made of this alloy and the metal plate. Therefore, the contents of 411j lead and magnesium are respectively: 3.5-4.5w
t%, and should be selected within the range of 0.2 to 0.5 wj%. The reason why an aluminum alloy plate containing 3.5 to 4.5 wL% of zinc and 0.2 to Q.5 wt% of magnesium is used as the other metal plate of the first metal plate and the second metal plate is as follows. . In other words, if you compare the strength of this aluminum alloy plate before aging treatment and the strength of a pure aluminum plate, the difference is small, and there is only a risk of warping in the finished product after hot rolling or cold rolling. It is. In addition, the aluminum alloy plate has age hardening properties and its strength increases significantly after aging, so the second metal plate side does not bulge in the tube expansion process, and as a result, the aluminum alloy plate This is because even if the difference in recrystallization temperature between the aluminum alloy plate and the pure aluminum plate is small, there is no need to strictly control the humidity during annealing. When subjected to aging treatment, the aluminum alloy plate ages and hardens, and its strength becomes considerably greater than that of the one metal plate, and when fluid pressure is introduced into the non-crimped part, the aluminum alloy plate Only the plate side bulges out.

According to this invention, since the difference in strength between the two metal plates before aging treatment is small, warping does not occur when the two metal plates are crimped together. In addition, the other metal plate of the first metal plate and the second metal plate is age hardened after annealing, and its strength is the same as that of the first metal plate when the tube is expanded.
The metal plate is larger than one of the metal plate and the second metal plate, and only this metal plate side bulges out. Therefore, both metal plates may be annealed together, and even if the difference in recrystallization temperature between the two is small, there is no need to strictly control the temperature during annealing as in the conventional method.

Next, embodiments of the invention will be described with reference to the drawings.

Example 1 In the drawings, the first metal plate (1) is A with a thickness of 26 mm.
The thickness of 100 plate (0) is 3 as the second metal plate (2).
．． 3rd throat Al 3.6wt%Z n -0,24wL
%Mg alloy plate (0 material) is prepared, and K on the second metal plate (2) is prepared.
It is printed in the form of a IIIE adhesion prevention adhesive, and the first metal plate (1) is placed on top of it, and hot rolled at a temperature of 500°C and a work rate of 60%, followed by cooling at a downstream rate of 40%. Final plate thickness by performing inter-rolling], 4. A nrm laminated board (3) was obtained. This laminated plate (3) was annealed at a temperature of 400° C. for 20 minutes, and then left to stand for 40 days to age harden the second metal plate (2). At this time, the tensile strength of the first metal plate (1) is 9≠ml, and the tensile strength of the second metal plate (2) is 18.5 KV.
-It was. After that, put this into a mold and mold pressure 45%.
G, first metal plate (1) with fluid pressure of 120% G to the non-crimped part
was bulged to obtain a single-sided bulged roll bond panel having a bulge (4). No bulging was observed on the second metal plate (2) side of this panel, and the original rounded surface was maintained. Note that the recrystallization temperature of the first metal plate (1) is 30
0°C, and the recrystallization temperature of the second metal plate (2) is 320°C.

Example 2 The aging conditions were the same as in Example 1 except that the aging conditions were 120°C and 20 hours, but the first metal plate (1) side was made to bulge, resulting in a flat surface similar to that in Example 1. A roll bond panel was obtained. The tensile strength of the first metal plate (1) after the aging treatment was 9 K9/mrtr, and that of the second metal plate (2) was 18.5 KSJ/mm.

[Brief explanation of the drawing]

The drawing is a partial cross-sectional view of a rolled e-bond panel obtained by the method of an embodiment of the invention. (1)...First metal plate, (2)...Second metal plate, (
4) Φ...bulge. Above Q'p Applicant: Showa Aluminum Co., Ltd. 4
given name

Claims (1)

[Claims] The first metal plate and the second metal plate are interposed with an anti-crimping agent in a predetermined form.
Manufacture of a single-sided expansion roll bond panel in which a metal plate is crimped and a fluid is introduced into the non-bonding part of the metal plate to bulge only one side of both metal plates at that part. In the method, 35 to 4.5 wt of zinc is used as the other metal plate.
%, magnesium 0.2 to 0.5 wL%, and is characterized in that an aging treatment is applied between the annealing process and the bulge-1: culm. Method of manufacturing e-bond panels.