JPH11325789A - Tank for heat exchanger and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a tank for heat exchanger manufactured by forming a pipe part in a tank body and a manufacturing method thereof in which the pipe part is brazed surely to the tank body. SOLUTION: In a tank for heat exchanger where a pipe part 13b is formed to project outward from a pipe hole 11a made in an aluminum tank body 11, fringe part of the pipe hole 11a is projected outward and the projected part 11b is fitted tightly to the inside at the root of the pipe part 13b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger tank such as a radiator or a condenser, and more particularly to a heat exchanger tank having a pipe body formed in a tank body and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a pipe of a hose for connecting a hose is formed in a tank of a heat exchanger such as a radiator.
One disclosed in Japanese Patent No. 2989 is known. FIG.
Reference numeral 1 denotes a heat exchanger tank of this type. In this heat exchanger tank, a circular pipe hole 1a is formed in a tank body 1 made of aluminum.

An insertion portion 2a formed at the tip of a pipe member 2 made of aluminum is inserted into the pipe hole 1a, and an annular protrusion 2b formed adjacent to the insertion portion 2a.
Is brazed R to the edge of the pipe hole 1a. That is, in this heat exchanger tank, for example, the tank body 1 is formed of an aluminum clad material having a sacrificial corrosion layer formed on the inner surface side and a brazing material layer formed on the outer surface side.

On the other hand, the outer diameter of the insertion portion 2a of the pipe member 2 is formed slightly smaller than the inner diameter of the pipe hole 1a, and the insertion portion 2a of the pipe member 2 is inserted into the pipe hole 1a. A non-corrosive flux is applied in a state where the annular projection 2b formed adjacent to the pipe abuts on the edge of the pipe hole 1a and is temporarily placed, and is heat-treated in a heat treatment furnace, so that the pipe member 2 The annular projection 2b has a pipe hole 1a.
Is brazed R to the edge of.

[0005]

However, in such a conventional heat exchanger tank, the outer diameter of the insertion portion 2a of the pipe member 2 is formed slightly smaller than the inner diameter of the pipe hole 1a. The insertion portion 2a of the member 2 may be brazed R in an eccentric state with respect to the pipe hole 1a. In such a case, the annular projection 2b of the pipe member 2 is replaced with the edge However, there is a problem that it is difficult to reliably braze.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and has as its object to provide a heat exchanger tank capable of reliably brazing a pipe portion to a tank body and a method of manufacturing the same. I do.

[0007]

According to a first aspect of the present invention, there is provided a heat exchanger tank, wherein the heat exchanger tank has a pipe portion formed by projecting outward from a pipe hole formed in a tank body made of aluminum. The edge of the hole protrudes outward, and this protruding portion is closely attached to the inside of the root of the pipe.

According to a second aspect of the present invention, there is provided a method of manufacturing a heat exchanger tank for manufacturing a heat exchanger tank according to the first aspect, further comprising: surrounding the pipe hole of the tank body. The flange formed at the root of the pipe member is abutted, and in this state, the edge of the pipe hole is squeezed, and the edge is closely contacted inside the root of the pipe member. .

According to a third aspect of the present invention, there is provided a method of manufacturing a heat exchanger tank for manufacturing a heat exchanger tank according to the first aspect of the present invention. The pipe material in which the hole is formed abuts, and in this state, the edge of the pipe hole and the edge of the through hole are squeezed to form the pipe portion with the pipe material, and the pipe hole is formed. The edge portion is closely embedded in the inside of the base portion of the pipe portion in a buried state.

(Action) In the heat exchanger tank of the first aspect, the edge of the pipe hole is projected outward, and this projected portion is
Close to the inside of the base of the pipe. In the method for manufacturing a heat exchanger tank according to the second aspect, the flange formed at the base of the pipe member is abutted around the pipe hole of the tank body, and in this state, the edge of the pipe hole is squeezed. By doing so, the edge of the tank body is brought into close contact with the inside of the base of the pipe member.

According to a third aspect of the present invention, there is provided a method of manufacturing a heat exchanger tank, wherein a pipe material having a through hole is abutted around the pipe hole of the tank body. By squeezing the edge of the hole, a pipe portion is formed from the pipe material, and the edge of the pipe hole is closely embedded inside the root of the pipe portion.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a first embodiment of a heat exchanger tank according to the present invention. In the figure, reference numeral 1
Reference numeral 1 denotes a tank body that forms a radiator tank.

The tank body 11 has a circular pipe hole 11a. The tank body 11 is made of an aluminum clad material and has a core material S (JIS300).
A sacrificial corrosion layer (JIS7072) is formed inside 3), and a brazing material layer (JIS4343) is formed outside. A flange 13 a formed at the root of the pipe member 13 is in contact with the pipe hole 11 a of the tank body 11.

The pipe hole 11a of the tank body 11
Edge protrudes inside the root of the pipe member 13,
The protruding portion 11b is in close contact with the root of the pipe member 13. The above-described heat exchanger tank is manufactured as described below by the first embodiment of the method for manufacturing a heat exchanger tank of the present invention.

First, a pipe member 13 as shown in FIG. 2 is manufactured. The pipe member 13 has a flange portion 13a formed at one end of a pipe portion 13b.

The pipe member 13 is made of aluminum and has a sacrificial corrosion layer G (JIS7072) formed inside and outside a core material S (JIS3003). This pipe member 13 is made of a pipe material 15 as shown in FIG.
Is formed by squeezing. The pipe material 15 is made of a disc-shaped plate material, and has a through hole 15a.

The pipe material 15 is made of aluminum, and a sacrificial corrosion layer G (JIS7072) is formed inside and outside a core material S (JIS3003). Then, the pipe member 13 is manufactured by squeezing the pipe material 15. This squeezing is performed using a first mold 17, a second mold 19 and a punch 21, as shown in FIG.

The first die 17 is formed with a hole 17a having a diameter larger than the through hole 15a of the pipe material 15.
Further, the second mold 19 has a hole 17 a of the first mold 17 which has a larger diameter than the through hole 15 a of the pipe material 15.
A smaller diameter hole 19a is formed. Second mold 1
Nine holes 19a accommodate a punch 21 having a step 21a and a tapered tip.

Then, as shown in (a), the outer periphery of the pipe material 15 is held between the first mold 17 and the second mold 19 in a pressed state, and the punch 21 is moved to the second mold 17. By moving from the hole 19a of the mold 19 toward the hole 17a of the first mold 17, the edge of the through-hole 15a of the pipe material 15 becomes as shown in (b) and (c). The pipe member 13 which is squeezed and has a flange portion 13a formed at one end of the pipe portion 13b is manufactured.

Next, in this embodiment, as shown in FIG. 5A, a flange portion 1 formed at the base of the pipe member 13 surrounding the pipe hole 11c of the tank body 11 is formed.
3a are arranged in contact with each other, and between the first mold 23 and the second mold 25, the flange portion 13a and the tank body 1 are disposed.
The outer circumference of one pipe hole 11c is held in a pressed state. The first mold 23 is formed with a hole 23 a having substantially the same diameter as the outer diameter of the pipe member 13.

The second mold 25 includes a tank body 1.
The diameter of the pipe member 13 is larger than the diameter of the pipe hole 11c.
A hole 25a having substantially the same diameter as the inner diameter of the hole is formed. Second
In the hole 25a of the mold 25, a punch 27 having a stepped portion 27a and having a tapered tip is accommodated. Then, the punch 27 is moved from the hole 25 a of the second mold 25 to the first mold 2.
By moving toward the third hole 23a, the edge of the pipe hole 11c of the tank main body 11 becomes (b) and (c).
As shown in (1), the edge of the pipe hole 11c of the tank body 11 is protruded, and the outside of the protrusion 11b is closely contacted with the inside of the root of the pipe member 13.

Thereafter, the pipe member 13 is brazed R to the tank body 11 by applying a non-corrosive flux to the tank body 11 and performing a heat treatment in a heat treatment furnace.
In the above-described heat exchanger tank, the edge of the pipe hole 11a of the tank body 11 projects outward, and this projection 11b is formed inside the root of the pipe 13b and the flange 13a.
Because it was close to, by brazing in this state,
The pipe member 13 can be securely brazed to the tank body 11.

In the above-described method of manufacturing the heat exchanger tank, the flange 13a formed at the base of the pipe member 13 is abutted around the pipe hole 11a of the tank body 11, and in this state, the pipe hole Since the edge of 11a is squeezed, the edge of the pipe hole 11a can be easily and reliably brought into close contact with the inside of the base of the pipe member 13 and the flange 13a.

Since the edge of the pipe hole 11a can be brought into close contact with the inside of the root of the pipe member 13, it is not necessary to temporarily fix the pipe member 13 to the pipe hole 11a separately. Further, in this embodiment, since it is not necessary to form the brazing material layer R on the pipe member 13, the sacrificial corrosion layer G can be located outside the pipe member 13, and corrosion due to hose connection can be reduced. Further, the insertability into the hose can be improved.

Further, in this embodiment, the tank body 1
Since the protruding portion 11b protruding from the edge of the one pipe hole 11a is formed in an arc shape, the water flow resistance can be reduced. FIG. 6 shows a second embodiment of the heat exchanger tank of the present invention. In the figure, reference numeral 11 denotes a tank main body forming a radiator tank.

The tank body 11 has a circular pipe hole 11a. The tank body 11 is made of an aluminum clad material and has a core material S (JIS300).
A sacrificial corrosion layer G (JIS7072) is formed inside 3), and a brazing material layer R (JIS4343) is formed outside. A flange 13a formed at the base of the pipe member 13 is closely attached to surround the pipe hole 11a of the tank body 11.

The pipe hole 11a of the tank body 11
Edge protrudes inside the root of the pipe member 13,
The protruding portion 11b is closely attached to the root of the pipe member 13 in an embedded state. The above-described heat exchanger tank is manufactured as described below by a second embodiment of the method for manufacturing a heat exchanger tank of the present invention.

First, as shown in FIG.
The pipe material 29 abuts around the pipe hole 11c. The pipe material 29 is made of a disc-shaped plate material, and has a through hole 29a smaller in diameter than the pipe hole 11c. The pipe material 29 is made of an aluminum clad material, and a sacrificial corrosion layer G (JIS7072) is formed inside and outside a core material S (JIS3003).

In this embodiment, FIG.
As shown in (1), the outer circumference of the pipe material 29 and the outer circumference of the pipe hole 11c of the tank body 11 are sandwiched between the first mold 31 and the second mold 33 in a pressed state. First mold 31
Is formed with a hole 31a having a larger diameter than the pipe hole 11c of the tank body 11.

Further, the tank body 1 is
The diameter of the first die 31 is larger than the diameter of the first pipe hole 11c.
A hole 33a having a smaller diameter than the hole 31a is formed.
A punch 35 having a tapered tip having a step 35a is housed in the hole 33a of the second mold 33. Then, the punch 35 is moved from the hole 33a of the second mold 33 to the first
By moving toward the hole 31a of the mold 31 of
The edge of the pipe hole 11c of the tank body 11 and the pipe material 29 are squeezed as shown in (b) and (c), and the pipe material 13 forms the pipe portion 13b and the flange portion 13a. The edge of the pipe hole 11a is closely buried inside the base of the pipe portion 13b.

Thereafter, the pipe member 13 is brazed R to the tank body 11 by applying a non-corrosive flux to the tank body 11 and performing a heat treatment in a heat treatment furnace.
In the above-described heat exchanger tank, the edge of the pipe hole 11a of the tank body 11 protrudes outward, and the protruding portion 11b is buried inside the root of the pipe portion 13b in a tightly buried state. The tank body 1
1, the pipe member 13 can be securely brazed.

In the above-described method for manufacturing the heat exchanger tank, the pipe material 29 having the through hole 29a is abutted around the pipe hole 11c of the tank body 11, and in this state, the pipe hole 11c is closed. By squeezing the edge and the edge of the through hole 29a, the pipe portion 13b and the flange portion 13a are formed by the pipe material 29,
Since the edge of the pipe hole 11a is buried closely inside the root of the pipe portion 13b, the pipe hole 11a
Can easily and surely come into close contact with the inside of the root of the pipe portion 13b.

Since the edge of the pipe hole 11a can be in close contact with the inside of the base of the pipe member 13, it is not necessary to temporarily fix the pipe member 13 to the pipe hole 11a separately. Further, the pipe portion 13b can be easily formed by plastic working of the pipe material 29 without separately manufacturing the pipe member 13.

In this embodiment, the pipe member 1
3 eliminates the need to form the brazing material layer R, so that the sacrificial corrosion layer G can be located outside the pipe member 13, reducing corrosion due to hose connection and improving insertability into the hose. Can be improved. Furthermore, in this embodiment, since the protruding portion 11b protruding from the edge of the pipe hole 11a of the tank body 11 is formed in an arc shape, the water flow resistance can be reduced.

In the first and second embodiments described above, an example was described in which the pipe member 13 was not formed with an annular protrusion for preventing the hose from coming off. However, as shown in FIG. An annular projection 13c for preventing the hose from falling off can be formed on the hose 13. This annular projection 13c
For example, as shown in FIG. 10A, this can be easily achieved by forming an annular recess 37b in the hole 37a of the first mold 37.

In this case, in order to take out the pipe member 13, the first mold 37 can be moved in a direction perpendicular to the moving direction of the punch 21. FIG.
0 (b), a step 21 is formed around the outer periphery of the punch 21.
By forming c, an annular protrusion 13d can be formed on the inner surface of the pipe member 13, and the annular protrusion 13c can be formed later by bulging the annular protrusion 13d.

[0037]

As described above, in the heat exchanger tank according to the first aspect, the edge of the pipe hole protrudes outward, and this protruding portion is in close contact with the inside of the base of the pipe portion. By brazing, the pipe portion can be securely brazed to the tank body.

In the method for manufacturing a heat exchanger tank according to the second aspect, the flange formed at the root of the pipe member is abutted around the pipe hole of the tank body, and in this state, the edge of the pipe hole is cut. Since the squeezing process is performed, the edge of the pipe hole can be easily and surely brought into close contact with the inside of the base of the pipe member. In the method for manufacturing a heat exchanger tank according to claim 3, a pipe material in which a through hole is formed abuts the pipe hole of the tank body, and in this state, the edge of the pipe hole and the edge of the through hole. By squeezing the pipe part, the pipe part is formed from the pipe material, and the edge of the pipe hole is buried inside the base of the pipe part so that it is tightly embedded. Easy and reliable close contact with the inside of the root.

Further, the pipe portion can be easily formed by plastic working of the pipe material.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a heat exchanger tank of the present invention.

FIG. 2 is an explanatory view showing a pipe member of the heat exchanger tank of FIG. 1;

FIG. 3 is an explanatory view showing a pipe material for forming the pipe member of FIG. 2;

FIG. 4 is an explanatory view showing a method for manufacturing the pipe member of FIG. 2;

FIG. 5 is an explanatory view showing a method of manufacturing the heat exchanger tank of FIG. 1;

FIG. 6 is a sectional view showing a second embodiment of the heat exchanger tank of the present invention.

FIG. 7 is an explanatory view showing a pipe material for forming a pipe member of the heat exchanger tank of FIG. 6;

FIG. 8 is an explanatory view showing a method of manufacturing the heat exchanger tank of FIG. 6;

FIG. 9 is an explanatory view showing a pipe member on which an annular protrusion for retaining is formed.

FIG. 10 is an explanatory view showing a method for manufacturing the pipe member of FIG. 9;

FIG. 11 is a sectional view showing a conventional heat exchanger tank.

[Explanation of symbols]

 Reference Signs List 11 tank body 11a pipe hole 11b projecting part 11c pipe hole 13 pipe member 13a flange part 13b pipe part 29 pipe material 29a through hole

Claims (3)

[Claims] 1. A tank body (1) made of aluminum.
In a heat exchanger tank having a pipe portion (13b) formed by projecting outward from a pipe hole (11a) formed in 1), an edge of the pipe hole (11a) is projected outward, and the protrusion is formed. A tank for a heat exchanger, wherein a portion (11b) is closely fitted inside a root portion of the pipe portion (13b). 2. A method for manufacturing a heat exchanger tank according to claim 1, wherein said pipe body surrounds said pipe hole of said tank body. A flange (13a) formed at the base of the pipe member (13a), and in this state, the edge of the pipe hole (11c) is squeezed, and the edge is formed inside the base of the pipe member (13). A method for producing a heat exchanger tank, comprising: 3. The method for manufacturing a heat exchanger tank according to claim 1, wherein the through hole (29a) surrounds the pipe hole (11c) of the tank body (11). Formed pipe material (2
9), and in this state, the edge of the pipe hole (11c) and the edge of the through hole (29a) are squeezed, and the pipe portion (13b) is formed by the pipe material (29).
And forming an edge of the pipe hole (11a) in close contact with the inside of the base of the pipe (13b) in a buried state.