JP2002361407A - Method for manufacturing box body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a box body which forms the box body excellent in air-tightness and pressure-proof and to lower a manufacturing cost by applying this manufacturing method. SOLUTION: On an opening part of two pieces of plates (an upper side 10a and a lower side 10b) bulge-formed, flanges (an upper side 11a and a lower side 11b) having almost the same size, are formed. Rectangular notching parts 12 are formed at suitable positions along the circumference of the flange 11a and cut-up pieces 14 are formed at the inner edges of the notching parts 12 or the circumference of the flange 11b, and the faced flanges 11a, 11b are abutted to assemble the plates 10a, 10b. Brazing material 18 is laid on the notching parts 12 and the cut-up pieces 14 are calked and fixed, and this is carried into a furnace and brazed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a method for manufacturing a box that forms an airtight box by brazing and joining two plates.

[0002]

In various fluid devices and heat-related devices, a box having a predetermined capacity is used for storing, separating, and flowing a fluid, and the box is airtight under a specified pressure. Performance, assembling workability,
Productivity such as mass production is required.

[0003] The present invention provides a method of manufacturing a box body which is airtight and has excellent pressure resistance by brazing and joining two bulge-formed plates to provide excellent workability. It is intended to reduce the manufacturing cost by applying this manufacturing method.

[0004]

According to a first aspect of the present invention, there is provided a method of manufacturing a box body, wherein a flange having substantially the same size is formed in an opening of two swelled plates, and the flange is formed along the periphery of the upper flange. Then, a horizontally long notch is formed at an appropriate position, and a cut-and-raised piece is formed on the inner edge of the notch or the periphery of the lower flange. Then, the plate is assembled by bringing the opposed flanges into contact with each other, the brazing material is placed in the notch, the cut-and-raised piece is fixed by caulking, and the piece is carried into a furnace and brazed.

According to a second aspect of the present invention, in the method of manufacturing a box body, flanges having substantially the same size are formed in the openings of the two swelled plates, and a horizontally long notch is formed along the periphery of the upper flange. It is formed at an appropriate position, a cut-and-raised surface is formed at the inner edge of the notch, and a cut-and-raised surface is formed at a position suitable for the notch at the peripheral edge of the lower flange. Then, the plate is assembled by bringing the opposed flanges into contact with each other, the brazing material is placed in the notch, held on both cut-and-raised surfaces, and is carried into the furnace and brazed.

[0006] In the above-described method for manufacturing a box, a press piece is formed at an appropriate position on the peripheral edge of the flange, and the bent piece is bent to assemble a plate. be able to.

Further, the method for manufacturing a box according to the present invention is directed to a heat exchanger for a heat exchanger in which a meandering passage from an inlet opened at one end to an outlet opened at the other end is formed, and one fluid passage for heat exchange is formed. The other fluid passage, which is applied to the box and exchanges heat, is formed by joining accumulators to both open ends of a tube row in which a number of capillary tubes are closely attached and juxtaposed. By applying the present invention to a box that forms a joint, it is possible to perform joint joining in a single brazing step.

[0008]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows an embodiment of the method for manufacturing a box according to claim 1, wherein two plates (upper plate 10a, lower plate 1) formed by bulging and forming a copper plate.
0b) is a process of assembling a box body for manufacturing a box body having a predetermined capacity by joining the opening surfaces to face each other.

As shown in the figure, both plates 10a, 10a
In the opening b, flanges (upper flange 11a, lower flange 11b) having substantially the same size are formed, and each side of the flange 11a has a notch 1 that is horizontally long along its periphery.
2 are formed. A cut-and-raised piece 14 is formed substantially at the center of each side of the flange 11b opposed to the flange 11b, and a cold piece 15 is formed at both corners.

The plates 10a and 10b are assembled by bringing the opposed flanges 11a and 11b into contact with each other (state B), the brazing material 18 is placed in the notch 12, and the cut and raised piece 14 is caulked to form the brazing material. 18 is fixed,
To fix both plates 10a and 10b (C
State). As the brazing material 18, a plate-shaped or foil-shaped material can be used in addition to the bar-shaped material shown in the figure.

The flange 11 thus contacted is
A brazing material 18 is set on each side of a and 11b, and this assembly is carried into a furnace and brazed. The wax melted in the furnace penetrates into the gap between the flanges 11a and 11b by capillary action and solidifies in a cooling process, and the flanges 11a and 11b are joined in an airtight manner to produce a box having excellent pressure resistance.

According to this manufacturing method, the box body can be stored with the brazing material 18 set, and can be taken out and immediately carried into the furnace, which is extremely convenient to handle. In addition, since both plates 10a and 10b are fixed, a holding jig is not required when the plate is carried into the furnace.

FIG. 2 shows another embodiment of this manufacturing method. In this example, a cut-and-raised piece 14 is formed substantially at the center of the inner edge of the notch 12, and a knot piece 15 is formed at both corners of the periphery of the flange 11a. Also in this example, the cut-and-raised piece 14 is caulked to fix the brazing material 18 and the knot piece 15 is bent to fix the two plates 10a and 10b.
5 may be formed on the flange 11a.

FIG. 3 shows an embodiment of a method of manufacturing a box according to the second aspect, and also shows a process of assembling the box. As in the previous example, flanges 11a and 11b having substantially the same size are formed in the openings of both plates 10a and 10b, and a laterally long notch 12 is formed on each side of the flange 11a along the periphery thereof. I have. A cut-and-raised surface 13 bent at a slight width is formed on the inner edge of the notch 12, and a cut-and-raised surface 16 is similarly formed at a position suitable for the notch 12 on the peripheral edge of the flange 11 b.

The plates 10a and 10b are assembled by bringing the opposed flanges 11a and 11b into contact with each other (state B).
The brazing material 18 is placed in the notch 12. In the assembled state, the notch 12 is formed into a concave groove by the cut-and-raised surfaces 13 and 16, and the brazing material 18 is held by the cut-and-raised surfaces 13 and 16, and is carried into the furnace and brazed.

According to this manufacturing method, the brazing material 18 is held by the cut-and-raised surfaces 13 and 16 without deviation, and the brazing material 18 can be set immediately before being loaded into the furnace. The setting of the material 18 can be easily performed. The cut-and-raised surface 16 is larger than the width of the notch 12.
By setting the width of the plate 10 large, the assembled plate 10
a and 10b can be prevented from being displaced. As in the previous example, a piece 15 is formed at an appropriate position on the periphery of the flanges 11a and 11b, and this is bent to form plates 10a and 10b.
May be assembled.

FIG. 4 shows an embodiment in which the method of manufacturing a box according to the present invention is applied to a specific product, and shows a heat exchanger incorporated in a water heater using a refrigerant. This heat exchanger forms a tube row 21 in which a number of capillary tubes 20 (copper thin tubes having a diameter of several mm) are closely attached and juxtaposed, and an accumulator 24 is joined to both open ends of the tube row 12, and a refrigerant inlet is connected to one end. On the other hand, the refrigerant outlet is opened to form a refrigerant passage (solid line arrow in the figure). On the other hand, flanges 11a, 11 of two swelled plates 10a, 10b (copper plates)
b is joined to form a thin box body, and a plurality of hollow chambers partitioned along the longitudinal direction are alternately communicated at a side end, and meandering from an inlet opened at one end to an outlet opened at the other end. Water passage (indicated by a broken line in the figure). And
A tube row 21 and a box body are laminated, a brazing material is set at a predetermined position, carried into a furnace, and brazed.
By forming a refrigerant passage with a large number of capillary tubes 10, a high-pressure gas refrigerant can be used, and by using a copper material for the member, batch joining by brazing is enabled.

The manufacturing method according to claim 1 is applied to the box for the heat exchanger, and a laterally long notch 12 is formed at an appropriate position on each side of the flange 11a along a peripheral edge, and the flange 11b is formed. A cut-and-raised piece 14 and a cold piece 15 are formed on each side, and the cut-and-raised piece 14 is caulked to fix the brazing material 18, and the cold piece 15 is bent to form plates 10a and 10b.
Is assembled. Tube row 2 in this assembled box
1 are laminated, fixed with a holding jig, and then carried into a furnace and brazed.

[0019]

The method of manufacturing a box according to the present invention is configured as described above. According to the method of manufacturing a box according to the first aspect, the box is stored with the brazing material 18 set. This can be taken out and immediately carried into the furnace, and its handling is extremely convenient. Claim 2
According to the method for manufacturing a box described in (1), the brazing material 18 can be set immediately before being loaded into the furnace, and the assembly of the box and the setting of the brazing material 18 can be easily performed.

In addition, the box body is excellent in pressure resistance and durability because the flanges 11a and 11b are airtightly joined, and the manufacturing method of the present invention is excellent in assembling workability, suitable for mass production, and improved in productivity. Manufacturing costs can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is an embodiment of the method for manufacturing a box according to claim 1,
The perspective view which shows an assembly process.

FIG. 2 is a perspective view of another embodiment.

FIG. 3 is an embodiment of the method for manufacturing a box according to claim 2,
The perspective view which shows an assembly process.

FIG. 4 is a perspective view of a heat exchanger to which the box manufacturing method of the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10a, 10b Plate 11a, 11b Flange 12 Notch 13,16 Cut-and-raised surface 14 Cut-and-raised piece 15 Kawze piece 18 Brazing material 20 Capillary tube 21 Tube row 24 Accumulator

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Go Okinoya 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Corporation (72) Inventor Nori Yamamoto 1-1-1, Showa-cho, Kariya-shi, Aichi Stock Company (72) Inventor Masahisa Uenishi 1-8-12 Miyamotocho, Kiryu-shi, Gunma Co., Ltd. Atago Seisakusho Co., Ltd. (72) Inventor Norio Tanata 1-8-12 Miyamotocho, Kiryu-shi, Gunma Atago Co., Ltd. (72) Inventor Noboru Otomo 1-8-12 Miyamoto-cho, Kiryu-shi, Gunma F-term (reference) at Atago Manufacturing Co., Ltd. 3E061 AA15 AB04 AD05 AD09 BA01 BA04 DB03 3L036 AA04

Claims (5)

[Claims] 1. Two swelled plates (upper side 10)
a, a flange (upper side 11a, lower side 11b) of substantially the same size is formed in the opening on the lower side 10b).
A notch 12 is formed at an appropriate position along the peripheral edge of the plate 10a, and a cut-and-raised piece 14 is formed on the inner edge of the notch 12 or the peripheral edge of the flange 11b. Assemble 10b, cut out brazing material 18 and cut 12
A method of manufacturing a box body which is placed in the inside and fixed by caulking the cut-and-raised piece 14, carried into a furnace and brazed. 2. The two bulge-formed plates (upper side 10).
a, a flange (upper side 11a, lower side 11b) of substantially the same size is formed in the opening on the lower side 10b).
The notch 12 is formed at an appropriate position along the periphery of the notch 12, the cut-and-raised surface 13 is formed at the inner edge of the notch 12, and the cut-and-raised surface 16 is formed at a position suitable for the notch 12 at the periphery of the flange 11 b. The plates 10a and 10b are assembled by bringing the opposed flanges 11a and 11b into contact with each other, and the brazing material 18 is cut out.
A method of manufacturing a box body which is placed in a furnace, held by the cut-and-raised surfaces 13, 16 and carried into a furnace for brazing. 3. The method for manufacturing a box body according to claim 1, wherein a strip 15 is formed at an appropriate position on the periphery of the flanges 11a and 11b and bent to assemble the plates 10a and 10b. 4. A heat exchanger box in which a meandering passage from an inlet opened at one end to an outlet opened at the other end is formed to form one fluid passage for heat exchange.
4. The method for producing a box according to 2 or 3. 5. The other fluid passage for heat exchange is formed by joining accumulators 24 to both open ends of a tube row 21 in which a number of capillary tubes 20 are closely attached and juxtaposed. The method for manufacturing a box according to claim 4, wherein the heat exchanger is formed.