JP2000180086A - Heat exchanger tank and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method for manufacturing a tank of heat exchanger in radiator, condenser, heater core, and the like, easily wile reducing the manufacturing cost significantly as compared with a conventional method. SOLUTION: An opening 11a in a tank body 11 made by bending a plate material to have a U-shaped cross-section is fitted with bends 13b formed along the opposite ends of a plate member 13. The, bends 13b of the plate member 13 are then stopped temporarily to the opening 11a in the tank body 11 by partial welding and jointed to the opening 11a.

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 used for a heat exchanger such as a radiator, a condenser, and a heater core, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a heat exchanger tank made of aluminum, for example, as shown in FIG. 10, a plate member 2 is temporarily fixed to a tank body 1 by caulking and then brazed. And in this heat exchanger tank, the tank body 1 is formed by deep drawing of press working.

[0003] Conventionally, as a heat exchanger tank made of aluminum, for example, as shown in FIG. 11, a tank main body 3 having a rectangular cross section formed by an electric drawn pipe is used.
Is known.

[0004]

However, FIG.
In the heat exchanger tank shown in (1), since the tank body 1 is formed by press-drawing deep drawing, dies having different dimensions are required according to the size of the tank, and the production cost increases. was there.

Particularly, in the case of a radiator, since the height of the tank body 1 is large, it is difficult to perform deep drawing.
There was a problem that the yield was poor. Further, in the radiator, there is a problem that it is difficult to secure a clearance between the tank body 1 and the plate member 2 during brazing because the total length of the tank body 1 is long.

In addition, there is a problem that the shape is complicated and the material yield is poor, for example, the crimping nail 2a and the crimp receiving portion 1a are required for temporary fixing by crimping. In the heat exchanger tank shown in FIG. 11, the tank body 3 has a cylindrical shape, so that there is a problem that it is difficult to form a tube hole or the like. In addition, the use of an electric-rendered tube for the tank body 3 has a problem that the cost increases.

An object of the present invention is to solve such a conventional problem and to provide a heat exchanger tank which can be easily manufactured and whose manufacturing cost can be greatly reduced as compared with the conventional one, and an object of the present invention. And

[0008]

According to a first aspect of the present invention, there is provided a heat exchanger tank which is formed along an edge of a plate member at an opening of a tank body formed by bending a plate material into a U-shaped cross section. The bent portion of the plate member is temporarily fixed to the opening of the tank body by partial welding, and the bent portion is joined to the opening. Features.

According to a second aspect of the present invention, there is provided a method for manufacturing a heat exchanger tank, wherein an aluminum plate is bent into a U-shape in cross section, and an opening of a tank body is formed along both edges of the aluminum plate member. After fitting the formed bent portion, the bent portion of the plate member is temporarily fixed to the opening of the tank body by partial welding, and then the bent portion is soldered to the opening. It is characterized by attaching.

(Function) In the heat exchanger tank according to the first aspect, a bent formed along both edges of the plate member at an opening of the tank body formed by bending a plate material into a U-shaped cross section. The bent portion is temporarily fixed to the opening of the tank body by partial welding, and is joined to the opening in this state.

According to a second aspect of the present invention, there is provided a method for manufacturing a heat exchanger tank, wherein an aluminum plate is bent into a U-shape in cross section to form an opening in a tank body along both edges of a plate member made of aluminum. With the formed bent portion fitted, the bent portion of the plate member is temporarily fixed to the opening of the tank body by partial welding, and then the bent portion is brazed to the opening.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the heat exchanger tank according to the present invention.
Reference numeral 1 denotes a radiator tank body. The tank main body 11 has a U-shaped cross section, has a lower surface opened, and serves as an opening 11a.

The tank body 11 is made of an aluminum clad material. A sacrificial corrosion layer is formed on the inner surface, and a brazing material layer is formed on the outer surface. A plate member 13 is disposed in the opening 11a of the tank body 11.

On both sides of the bottom surface 13a of the plate member 13, bent portions 13b are formed at right angles along both edges thereof. The bent portion 13b of the plate member 13 is inserted into the opening 11a of the tank body 11 and brazed to the opening 11a. The plate member 13 is made of an aluminum clad material, a sacrificial corrosion layer is formed on the inner surface side, and a brazing material layer is formed on the outer surface side.

As shown in FIG. 3, the plate member 13 has a tube hole 13c into which the tube 15 is inserted at a predetermined interval in the longitudinal direction. Also, as shown in FIG. 4, end plates 17 are mounted and brazed on both sides of the tank main body 11. Tank body 11
As shown in FIG. 5, a pipe member 19 for circulating coolant is mounted on the side surface of the.

FIG. 6 shows an upper surface of the tank body 11.
As shown in FIG. 7, a filler neck 21 is mounted.
As shown in FIG. 7, the above-mentioned tank body 11 cuts a coil material 23 made of aluminum clad material into a predetermined length to obtain a plate material 25, and a pipe hole 1 is formed in the plate material 25.
1b and a hole 11c for a filler neck are formed, and thereafter, the plate material 25 is pressed by a mold and bent into a U-shaped cross section.

The above-described plate member 13 is similar to the one shown in FIG.
As shown in FIG. 7, after a coil material 27 made of an aluminum clad material is cut into a predetermined length to obtain a plate material 29, the plate material 29 is pressed by a mold to form a bent portion 13b. The tube hole 13c is formed in the bottom surface portion 13a by press working, and finally the shape is corrected by restriking.

The above-described heat exchanger tank is manufactured as described below by one embodiment of the method for manufacturing a heat exchanger tank of the present invention. First, a tube 15, corrugated fins, and the like are assembled between a pair of plate members 13 arranged at a predetermined interval, and the core is assembled. Next, the tank body 11 is fitted to the plate member 13, and the tank body 11 is temporarily fixed to the plate member 13.

As shown in FIG. 9, the temporary fixing is such that the outer side of the tank body 11 on the side of the opening 11a is sandwiched by the electrodes 31 and the opening 11a of the tank body 11 is
This is performed by spot welding to the third bent portion 13b. In this case, the opening 11a of the tank body 11
The plate member 13 is inserted into the
1 is sufficiently longer than the plate member 13,
Since the electric resistance is high, spot welding can be easily and reliably performed without an inner electrode.

The pressure applied to the electrode 31 is, for example, 10
A small force of about 30 kgf is sufficient, and the current is 7000-
A low current of about 10000 A is sufficient. Further, by spot welding at least one location in the longitudinal direction of the tank main body 11, the tank main body 11 can be temporarily fixed to the plate member 13 easily while securing an appropriate clearance.

The pipe body 19 and the filler neck 21 are previously assembled in the tank body 11 in a temporarily fixed state. In addition, the end plate 17 is a plate member 1
The temporary fixing is performed simultaneously with or after the temporary fixing of No. 3. Then, in this state, a non-corrosive flux made of a water-soluble or resin is applied, and heat treatment is performed, so that the contact portions of the respective members are brazed.

In the heat exchanger tank configured as described above, the plate member 25 is bent into a U-shaped cross section to form the tank body 11.
The bent portion 13b formed along both edges of the plate member 13 is inserted into the opening 11a of the tank body 11, and the bent portion 13b is inserted into the opening 1a of the tank body 11.
Since it is joined to 1a while being temporarily fixed by partial welding, the production becomes easy, and the production cost can be greatly reduced as compared with the related art.

That is, in the above-described heat exchanger tank, as shown in FIG. 7, the plate member 25 is bent into a U-shape in cross section to form the tank body 11, so that the length of the plate member 25 in the longitudinal direction is increased. By cutting with different lengths L, it is possible to easily form tank bodies 11 having different lengths with the same mold. Therefore, the tank body 11 is
The manufacturing cost can be greatly reduced as compared with the case of forming by deep drawing of press working.

Further, since the height H of the tank body 11 can be easily increased, the tank body 11 such as a radiator can be easily and reliably manufactured. Furthermore, even when the entire length of the tank body 11 is long, the clearance between the tank body 11 and the plate member 13 can be secured, and reliable brazing can be performed.

Since the tank body 11 and the plate member 13 can be obtained by the coil members 23 and 27, the material cost can be greatly reduced as compared with the case where the electric-rendered tube is used. . Further, as shown in FIG. 8, since the processing of the tube hole 13c and the like becomes very easy, the manufacturing cost can be further reduced.

In the above-described method for manufacturing a heat exchanger tank, both the aluminum plate member 13 and the aluminum plate member 13 are formed in the opening 11a of the tank body 11 formed by bending the aluminum plate 25 into a U-shaped cross section. After fitting the bent portion 13b formed along the edge, the bent portion 13b of the plate member 13 is temporarily fixed to the opening 11a of the tank main body 11 by partial welding, and then folded into the opening 11a. Song 1
3b is brazed, so that the bent portion 13b can be securely brazed to the opening 11a.

In the above-described embodiment, an example in which the present invention is applied to a radiator has been described. However, the present invention is not limited to such an embodiment.
It can be widely applied to heat exchangers such as condensers.
Further, in the above-described embodiment, an example was described in which the tank body 11 and the plate member 13 were temporarily fixed by electric spot welding. However, the present invention is not limited to such an embodiment. It may be temporarily fixed.

Further, in the above-described embodiment, an example was described in which a clad material was used for the tank body 11 and the plate member 13. However, a brazing material may be used and brazing may be performed using a bare material. .

[0029]

As described above, in the heat exchanger tank according to the first aspect, the plate is bent into a U-shape in cross section to form a tank main body. The bent part formed along the edge was inserted, and this bent part was temporarily fixed to the opening of the tank body by partial welding, and the bent part was joined to the opening, so that manufacturing was possible. It is easy and can greatly reduce the manufacturing cost as compared with the related art, and furthermore, the bent portion can be securely joined to the opening.

In the method of manufacturing a heat exchanger tank according to the second aspect, the opening of the tank body formed by bending an aluminum plate into a U-shaped cross section is formed along the both edges of the plate member made of aluminum. After inserting the formed bent portion, the bent portion of the plate member was temporarily fixed to the opening of the tank body by partial welding, and then the bent portion was brazed to the opening. The bent portion can be securely brazed to the opening.

[Brief description of the drawings]

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

FIG. 2 is a side view showing the heat exchanger tank of FIG. 1;

FIG. 3 is a sectional view showing a tube hole of the heat exchanger tank of FIG. 1;

FIG. 4 is a front view showing the heat exchanger tank of FIG. 1;

FIG. 5 is a sectional view showing the pipe member of FIG. 1;

FIG. 6 is a sectional view showing the filler neck of FIG. 1;

FIG. 7 is an explanatory view showing a method of manufacturing the tank body of FIG. 1;

FIG. 8 is an explanatory view showing a method of manufacturing the plate member of FIG.

FIG. 9 is a sectional view showing a method of temporarily fixing the tank body and the plate member of FIG. 1;

FIG. 10 is a sectional view showing a conventional heat exchanger tank.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Tank main body 11a Opening 13 Plate member 13b Bending part 25 Plate material

Claims (2)

[Claims] 1. A fold formed along both edges of a plate member (13) in an opening (11a) of a tank body (11) formed by bending a plate material (25) into a U-shaped cross section. The bent portion (13b) is inserted and the bent portion (13b) of the plate member (13) is temporarily fixed to the opening (11a) of the tank body (11) by partial welding. A tank for a heat exchanger, wherein the bent portion (13b) is joined to a portion (11a). 2. An opening (11a) of a tank body (11) formed by bending a plate material (25) made of aluminum into a U-shaped cross section, and both edges of a plate member (13) made of aluminum. After the bent portion (13b) formed along the opening is inserted, the opening (1) of the tank body (11) is inserted.
1a), the bent portion (1) of the plate member (13) is provided.
3b) is temporarily fixed by partial welding, and thereafter, the bent portion (13b) is brazed to the opening (11a).