JP2005315514A - Method of manufacturing radiator with built-in oil cooler and oil cooler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a radiator with a built-in oil cooler and the oil cooler enabling the tank of the radiator to be well fixedly brazed to the oil cooler. <P>SOLUTION: This method of manufacturing the radiator with the built-in oil cooler in which the oil cooler 6 is stored in the tank 1b of the radiator comprises a former step in which the tank 1b is formed of a first split part 12 to which the oil cooler 6 is fixed and a second split part 13 excluding the first split part 12 and each part of the oil cooler 6, the oil cooler 6, and the first split part 12 are fixed to each other by brazing with the first split part 12 temporarily assembled with the oil cooler 6 and a latter step in which the first split part 12 is temporarily assembled with the second split part 13 and fixedly brazed to each other with the oil cooler 6 stored in the tank 1b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method of manufacturing a radiator with a built-in oil cooler and an oil cooler.

2. Description of the Related Art Conventionally, a manufacturing method of an oil cooler built-in radiator in which an oil cooler is accommodated in a tank of the radiator and a technique of the oil cooler are known (see Patent Documents 1 to 3).
Also, in recent years, radiators made of all-aluminum, in which the tank and core of the radiator are made of aluminum, have been developed. In such a radiator, both are brazed together with an aluminum oil cooler contained in the tank. Will be.
JP 2001-153586 A Japanese Patent Laid-Open No. 10-73393 Japanese Patent Laid-Open No. 11-142089

However, in the inventions described in Patent Documents 1 to 3, when brazing a radiator made of total aluminum, heat is not easily transmitted to the oil cooler in the tank, so the oil cooler does not rise in temperature and a brazing failure is likely to occur. There was a problem.
Therefore, it is conceivable to fix each part of the oil cooler by brazing only the oil cooler in advance, and then fixing the oil cooler and the tank by brazing in a state accommodated in the tank. Further, since the temperature of the contact portion of the tank that fixes the oil cooler is particularly difficult to raise, there is a problem that both cannot be fixed well.

  The present invention has been made paying attention to the above-mentioned problems, and an object of the present invention is to provide a method of manufacturing a radiator with a built-in oil cooler and an oil cooler capable of satisfactorily brazing and fixing the tank of the radiator and the oil cooler. There is to do.

  According to the first aspect of the present invention, there is provided an oil cooler-manufactured radiator and an oil cooler in which the oil cooler is accommodated in a tank of the radiator, wherein the tank is provided with a first divided portion to which the oil cooler is fixed; Before fixing the parts of the oil cooler and the oil cooler and the first divided part by brazing in a state where the first divided part and the oil cooler are temporarily assembled. And a post-process for fixing both the first and second divided parts by temporarily assembling and brazing the oil cooler in a state where the oil cooler is housed in a tank.

  In the invention of claim 2, a pair of upper shell and lower shell, which are formed in a dish shape with the peripheral edge raised, and have cylindrical portions at both ends, are in the middle of each other with the inner fins accommodated inside. In the oil cooler in which the heat exchange part is formed by stacking a plurality of the element parts through sheets, one of the element parts located at the outermost end of the heat exchange part. The connection pipe is fixed in a state where it communicates with the cylindrical portion of the upper shell of the element portion, and the patch plate for closing the cylindrical portion of the lower shell of the other element portion is fixed.

  In the first aspect of the present invention, the tank is composed of a first divided portion to which the oil cooler is fixed and a second divided portion excluding the first divided portion, and the first divided portion and the oil cooler are temporarily installed. Each part of the oil cooler by brazing in the assembled state, a pre-process for fixing the oil cooler and the first divided part, and the first divided part and the second divided part in a state where the oil cooler is accommodated in the tank And a post-process for fixing both of them by temporary assembly and brazing, so that each part of the oil cooler and the first divided part can be satisfactorily brazed and fixed in the previous process. The first divided part and the second divided part can be brazed well and fixed.

  Therefore, as compared with the conventional invention, the oil cooler and the first divided portion can be smoothly heated in advance and fixed well in the previous process, and the oil cooler can be accommodated in the tank in a stable state.

  In the invention according to claim 2, the connecting pipe is fixed in a state where it communicates with the cylindrical portion of the upper shell of one of the element portions located at the outermost end of the heat exchange portion, and the other element Since the patch plate that closes the cylindrical part of the lower shell of the part is fixed, the lower shell and upper shell of the element part in the heat exchange part can be made common to reduce the types of parts, and it is possible to reduce time and cost in mold setup and processes Become.

  Hereinafter, the manufacturing method of the radiator with built-in oil cooler of the present invention and the example of the oil cooler will be described.

  1 is an overall view showing a method of manufacturing a radiator with a built-in oil cooler and an oil cooler according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line S2-S2 in FIG. 1, and FIG. 3 is a sectional view taken along line S3-S3 in FIG. FIG. 4 is a diagram for explaining the element part (a) and the heat exchanging part (b), FIG. 5 is a diagram for explaining the fixing of the first divided part and the oil cooler, and FIG. 6 is for fixing the oil cooler to the tank. It is a figure explaining.

As shown in FIG. 1, the radiator with a built-in oil cooler of this embodiment includes a pair of seat plates 2a and 2b on which tanks 1a and 1b are mounted, and tubes 3a and 2b arranged between the seat plates 2a and 2b. The core part 4 comprised by the corrugated fin 3b and the reinforcements 5a and 5b which connect and reinforce the both ends of the said seat plates 2a and 2b are made into the main structures.
An oil cooler 6 to be described later is accommodated in the tank 1b, and all components including the oil cooler 6 are made of aluminum.

  As shown in FIGS. 2 and 3, the oil cooler 6 has a connection between the tank 1 b and the heat exchange section 8, which is stacked in a state where the cylindrical sections 7 a formed at both ends of each element section 7 communicate with each other. A pair of connecting pipes connected to the space O formed at both ends of the heat exchanging portion 8 by being connected to the heat exchanging portion 8 through the pipe connectors 9 and 9 from the pipe mounting holes O1 and O1, respectively. P1 and P2 are the main components.

  The tank 1b has a U-shaped cross-section divided portion 12 (corresponding to a first divided portion) and a divided portion 13 which are formed so as to have a rectangular cross-sectional shape by fitting the opening end portions 10 and 11 to each other. (Second division unit).

  In addition, a brazing sheet (clad material) coated with a brazing material on at least one side is used at the contact portion of each component constituting the tank 1b and the oil cooler 6.

Hereinafter, the manufacturing method of the radiator with a built-in oil cooler of a present Example is demonstrated.
First, as a pre-process, as shown in FIG. 4 (a), a plurality of blades B (see FIG. 5) are provided, the peripheral edges thereof are raised to form a dish, and both ends are subjected to burring processing. The element part 7 is formed by press-fitting or caulking and fixing a pair of upper shell 7b and lower shell 7c having the formed cylindrical part 7a to each other with the wavy inner fin 7d interposed therebetween.

Subsequently, as shown in FIG. 4B, the heat exchange section 8 is formed by laminating a plurality (5 layers in this embodiment) of the element sections 7 with the cylindrical sheet 19 interposed therebetween.
Of the element parts 14 and 15 which are the outermost ends in the stacking direction of the heat exchange part 8, a sheet 19a thicker than the other sheets 19 is stacked on the tubular part 7a of the element part 14, and the element A patch plate PT (see FIGS. 2 and 3) for closing the cylindrical portion 7a of the lower shell 7c is fitted to the lower shell 7c of the portion 15 via the seat 19.

  Therefore, in the oil cooler of this embodiment, the shapes of the lower shell 7b and the upper shell 7c of the element part 7 in the heat exchange part 8 can be made common to reduce the types of parts, and the time and cost in mold setup and processes can be reduced. It becomes.

  Next, as shown in FIG. 5, the cylindrical portions 7a, 7a of the element portion 14 and the center of the connection pipe mounting holes O3, O3 of the first divided portion 12 are made to coincide with each other, and here the connection pipes P1, P2 The pipe connectors 9 and 9 into which the oil is pressed are press-fitted or caulked and fixed to the cylindrical portions 7 a and 7 a of the element portion 14, so that the oil cooler is temporarily assembled to the first divided portion 12.

Subsequently, the oil cooler 6 is heat-treated together with the first divided portion 12 in a heating furnace (not shown) to braze the portions of the oil cooler 6 and the contact portions between the first divided portion 12 and the oil cooler 6. End the previous process.
At this time, since the heat treatment in the heating furnace can be carried out at a temperature and time suitable for brazing of the oil cooler, each part of the oil cooler and the first divided part 12 are heated smoothly, and thereby both are brazed well. Can be fixed.

Next, as a post process, as shown in FIG. 6, the second divided part in which the core part 4 of the radiator is temporarily assembled into the opening end parts 10 and 10 of the first divided part 12 fixed together with the oil cooler 6 in the previous process. It is fitted to the open end portions 11 and 11 of the section 13, and further, a patch (not shown) is fitted to both ends of the tank 1b, and heat treatment is performed in a heating furnace (not shown) in a state where the oil cooler 6 is accommodated inside. By this, each part of the said core part 4 and both the division parts 12 and 13 are brazed, and a post process is complete | finished.
At this time, since the heat treatment in the heating furnace can be performed at a temperature and time suitable for brazing of each part of the radiator, it is necessary to set the temperature in the heating furnace high or extend the heat treatment time as in the conventional invention. In addition, each part of the radiator and both divided parts 12 and 13 can be brazed well.

  The radiator with a built-in oil cooler manufactured in this manner allows engine and AT oil to flow from the connection pipe P1 to flow in the element portion 7 of the heat exchanging portion 8 in the longitudinal direction, and the oil and cooling water in the tank 1b. After the heat exchange, the cooling circuit discharges from the connection pipe P2.

  Therefore, in the manufacturing method of the radiator with a built-in oil cooler according to the present embodiment, the oil cooler 6 and the first divided portion 12 can be brazed together in the previous step and both can be fixed well, so that the cooling water in the tank 1b is transferred to the outside. There is no risk of leakage, and the reliability of the product can be improved by reliably brazing each part of the oil cooler 6.

  In addition, the oil cooler of the present embodiment can reduce the types of parts by sharing the shapes of the lower shell 7b and the upper shell 7c of the element portion 7 in the heat exchanging portion 8, and can reduce time and cost in mold setup and processes. It becomes.

  Although the embodiments of the present invention have been described above, the specific configuration of the present invention is not limited to the embodiments, and the present invention includes any design changes that do not depart from the gist of the invention. It is.

  For example, the shape of the dividing parts 12 and 13 and the combined state of both can be set as appropriate.

  In addition, after the oil cooler 6 is temporarily assembled on the second divided portion 13 side in the previous process and brazed together with the radiator core 4, the first divided portion 12 and the second divided portion 13 are brazed in the subsequent process. In some cases, it may be fixed.

It is a general view which shows the manufacturing method of the radiator with a built-in oil cooler of an Example of this invention, and an oil cooler. It is sectional drawing in the S2-S2 line | wire of FIG. It is sectional drawing in the S3-S3 line | wire of FIG. It is a figure explaining an element part (a) and a heat exchange part (b). It is a figure explaining fixation of a 1st division part and an oil cooler. It is a figure explaining accommodation to the tank of an oil cooler.

Explanation of symbols

O space O1 connection pipe mounting hole P1, P2 connection pipe PT patch plate 1a, 1b tank 2a, 2b seat plate 3a tube 3b corrugated fin 4 core part 5a, 5b reinforcement 6 oil cooler 7 element part 7a cylindrical part 7b upper shell 7c Lower shell 7d Inner fin 8 Heat exchange part 9 Pipe connector 10, 11 Open end 12 First divided part 13 Second divided part 14, 15 Element part 19, 19a (to be outermost end) Seat

Claims (2)

An oil cooler manufacturing method and an oil cooler in which an oil cooler is accommodated in a tank of a radiator,
The tank is composed of a first divided portion to which an oil cooler is fixed and a second divided portion excluding the first divided portion,
Each part of the oil cooler by brazing the first divided part and the oil cooler in a temporarily assembled state, and a pre-process for fixing the oil cooler and the first divided part;
A post-process for fixing both the oil cooler by temporarily assembling and brazing the first divided portion and the second divided portion with the oil cooler contained in the tank;
A method of manufacturing a radiator with a built-in oil cooler. A pair of upper shells and lower shells, which are formed in a dish-like shape with their peripheral edges raised, and which have cylindrical portions at both ends, are overlapped in the middle with the inner fins inside to form the element portion And
In an oil cooler in which a heat exchange part is formed by laminating a plurality of the element parts via a sheet,
A patch that fixes the connecting pipe in a state where it communicates with the cylindrical portion of the upper shell of one element portion and closes the cylindrical portion of the lower shell of the other element portion among the element portions located at the outermost end of the heat exchange portion An oil cooler with a fixed plate.

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