KR20110136083A - Header plate for heat exchanger - Google Patents

Abstract

The present invention relates to a header plate for a heat exchanger which receives an end of a square tube used for dispensing working fluid from within the tube constituting the heat exchanger or from the interior of the heat exchanger tube, for this purpose communicating with a plurality of square tubes. A body portion having a plurality of tube receiving holes formed therein and having a circumferential end bent inward for engagement with a header tank through which working fluid flows while forming a rim portion, and from the circumference of each tube receiving hole formed in the body portion It is formed so as to project outwardly in the direction opposite to the coupling direction with the header tank and comprises a receiving flange for receiving the end of each square tube, the receiving flange is protruding from the portion where the tube receiving hole of the body portion is formed Heat exchange, characterized in that the thinner gradually formed in the direction The header plate is provided.

Description

Header plate for heat exchanger {header plate for use in a heat exchanger}

The present invention relates to a heat exchanger, and more particularly to a header plate for a heat exchanger which receives an end of a rectangular tube which is used for dispensing working fluid from within the tube constituting the heat exchanger or from within the heat exchanger tube.

In general, the flat tube heat exchanger is a type of heat exchanger mainly used for an intercooler of a vehicle, and is formed while a plurality of square tubes are regularly spaced between a pair of header plates that are installed to face each other.

At this time, the tube receiving hole is formed on the opposite surface of each header plate, the square tube is installed so as to pass through the tube receiving hole.

However, the header plate according to the conventional general structure described above does not affect the flow of the working fluid flowing through the inner space of the header plate, considering that the end of the square tube is installed to be inserted into the inner space of the header plate. Not only does it have a disadvantage that the smooth distribution of the working fluid is not achieved, but also has the disadvantage of low durability due to thermal shock.

Therefore, conventionally, as shown in Korean Patent Publication No. 10-2007-0100172, a flange having a shape corresponding to the end of the rectangular tube protrudes from the opposite surface of the two header plates around the tube receiving hole in the outer wall surface of the header plate. It is formed to surround the end of the square tube to further improve the durability according to the thermal shock and to ensure a smooth flow of the working fluid.

However, the above-described prior art has difficulty in manufacturing because the thickness of the flange to which the end of the square tube is coupled is formed to have the same thickness to the end thereof except for the portion where the bending occurs from the base wall of the square tube. This has the problem that it occurs.

In particular, in the above-described prior art, a rupture phenomenon such as bursting at each corner portion occurs in the process of further expanding the outer end of the flange, and this rupture phenomenon affects the flow of air passing through the periphery. In addition, there is a problem that the working fluid flowing through the square tube leaks to the rupture site.

The present invention has been made to solve the various problems according to the prior art described above, the object of the present invention is to improve the durability due to thermal shock through the structural improvement of the flange formed on the header plate for the coupling of the square tube The present invention also provides a header plate for a new type of heat exchanger and a method of manufacturing the same so that bursting of each corner portion during manufacturing can be prevented.

The header plate for the heat exchanger of the present invention for achieving the above object is formed inwardly for coupling with a header tank in which a working fluid flows while forming a rim portion while forming a plurality of tube receiving holes for communication with a plurality of square tubes. A body portion having a bent circumferential end, and formed to protrude outwardly from a circumference of each tube receiving hole formed in the body portion toward a direction opposite to the coupling direction with the header tank; It is configured to include a flange, the receiving flange is characterized in that the thickness gradually becomes thinner toward the protruding direction from the portion in which the tube receiving hole of the body portion is formed.

Here, the inner wall surface of the receiving flange is formed to form a vertical state from the inner wall surface of the body portion and the outer wall surface of the receiving flange is the end of the rounding portion and the rounding end is bent round from the outer wall surface of the body portion The inwardly inclined inclined portion gradually formed toward the site is characterized in that the overall thickness is gradually formed thinner.

In addition, the inclined portion of the receiving flange is characterized in that it is formed to have an inclination angle of 1.5 ° ~ 2 °.

In addition, the end portion of the receiving flange is characterized in that the outward bending is formed so that the opening width gradually increases toward the outside.

And, according to the manufacturing method of the heat exchanger header plate of the present invention for achieving the above object a beading step of bending the portion where the receiving flange of the header plate is to be formed; Bending the edge portion of the header plate to form an inner space; A piercing step of allowing the center portion of the receiving flange bent by the beading step to be opened; A burring process for protruding outwardly the receiving flange with the central portion opened; Bulging process for extending the end of the receiving flange protruded outward by the burring process: is carried out sequentially, the burring process is formed so that the inner wall surface of the receiving flange is vertical by using a forging press mold In addition, the outer wall surface is characterized in that it proceeds by forming to protrude outwards gradually thinner thickness.

According to the header plate for the heat exchanger of the present invention as described above, because the receiving flange is a structure protruding toward the opposite direction between each header plate, while the thermal durability can be improved, the receiving flange gradually decreases in thickness toward its end. By forming, it is possible to prevent the rupture of the corner portion, in particular has the effect that can be smoothly formed to expand the end portion of the receiving flange through the bulging process.

In addition, according to the manufacturing method of the heat exchanger header plate of the present invention, the process for achieving a gradual change in thickness of the receiving flange is carried out through a forging press operation, which enables accurate molding to a desired shape and also during the operation. It is effective to prevent the rupture of each corner portion of the receiving flange.

Figure 1 is a perspective view of the main portion shown to explain the structure of a preferred embodiment of a heat exchanger header plate of the present invention
Figure 2 is a plan view showing for explaining the structure of a preferred embodiment of the heat exchanger header plate of the present invention
3 is a cross-sectional view taken along the line II of FIG. 2.
4 is a cross-sectional view taken along the line II-II of FIG.
5 to 9 is a schematic enlarged view of the main portion shown for explaining the process of manufacturing a header plate for a heat exchanger of the present invention

Hereinafter, a preferred embodiment of a heat exchanger header plate and a method of manufacturing the same will be described with reference to FIGS. 1 to 9.

Prior to the description, the header plate for the heat exchanger of the present invention is a series for coupling with the square tube 20, each formed to close the open surface of the header tank 10 through which the working fluid flows, as shown in FIG. It means the configuration.

At this time, the square tube 20 is a rectangular tube having two sides on the long side and two sides on the short side, and each corner portion of the square tube 20 is formed to be rounded.

As shown in FIG. 2, a header plate for a heat exchanger according to a preferred embodiment of the present invention includes a body 100 and a receiving flange 200. In particular, the receiving flange 200 is attached to FIGS. 3 and 3. As shown in FIG. 4, the thickness is gradually formed in the protruding direction.

This will be described for each component as follows.

First, the body portion 100 is a portion constituting the body of the header plate, a plurality of square tube 20 is installed on the outer wall surface for the transfer of the working fluid.

Here, the outer wall surface of the body portion 100 is formed with a plurality of tube receiving holes 110 in which each square tube 20 is communicated, the header tank 10 along the circumference of the body portion 100 The circumferential end 120 which is bent toward the direction in which the header tank 10 is positioned for coupling with is formed.

And, the receiving flange 200 is a series of configurations to assist the square tube 20 to be installed in the body portion 100, of each tube receiving hole 110 formed in the body portion 100 The end of each square tube 20 is configured to be protruded outwardly (the opposite direction between two corresponding header plates) to be received. This structure is a structure for improving thermal durability, which is as introduced in the prior art.

In addition, in the embodiment of the present invention, the receiving flange 200 is characterized in that the thickness gradually becomes thinner toward the protruding direction from the portion where the tube receiving hole 110 of the body portion 100 is formed. .

This structure is to prevent the bursting of the edge portion of the receiving flange 200 in advance.

That is, the remaining parts (rounding from the end of the rounding to the end), except for the rounded portion, which is a corner portion that is bent from the outer wall surface of the body portion 100, such as Korean Patent Publication No. 10-2007-0100172 presented in the prior art Since the process for forming the same thickness) is performed by a conventional punching press process, some bursting occurs after the processing is completed, and such bursting may occur due to leakage of working fluid or surroundings. The problem is applied to the flow of air passing through the additional problem caused by the configuration is to prevent the burst phenomenon.

In particular, in the case of the receiving flange 200 according to an embodiment of the present invention, the inner wall surface is formed to be perpendicular to the inner wall surface of the body portion 100 and the outer wall surface of the receiving flange 200 is the body portion Rounding portion 210 is bent round from the outer wall surface of the 100 and the inclined portion 220 inclined gradually toward the end portion from the end portion of the rounding portion 210 to the end portion is gradually thinner as the overall thickness is gradually thinner It shows that the fork is formed.

That is, the inner wall surface of the receiving flange 200 to form the same plane as the outer wall surface of the square tube 20 to improve the adhesion between each other to prevent leakage of the working fluid, the outer wall surface of the receiving flange 200 It is formed to become thinner gradually toward the end to prevent the burst phenomenon after the completion of processing.

At this time, the inclined portion 220 of the receiving flange 200 is most preferably formed to have an inclination angle θ2 of 1.5 ° ~ 2 °.

This, when the inclined portion 220 is formed to have a smaller inclination angle than the inclination angle of the above range may occur a burst phenomenon for the corner portion of the receiving flange 220, if the inclination angle of the range This is because, when formed to have a large inclination angle compared to the end thickness of the receiving flange 200 is excessively thin, the risk of damage to the corresponding portion may increase.

The shape of the receiving flange 200 as described above may be performed by a forging press process, not through a press process using a conventional punching method. That is, the thickness of the accommodating flange 200 may be gradually reduced by the forging method.

On the other hand, the expansion end 230 is further formed at the end portion of the above-mentioned receiving flange 200. In this case, the expansion end 230 is formed by bending outward so that the opening width gradually increases toward the outside of the receiving flange 200.

The expansion end 230 has a structure in which the square tube 20 is press-fitted to the correct position by the feature of the progressive expansion structure when coupled with the square tube 20.

In the following, a method of manufacturing a heat exchanger header plate according to an embodiment of the present invention configured as described above will be described in more detail with reference to FIGS. 5 to 9.

First, the primary molding by performing the primary molding of the forming portion of the receiving flange 200 through the beading (beading) process as shown in Figure 5 in the state of preparing a flat body portion 100 for the manufacture of the header plate The portion 201 is formed.

Here, the beading process is a process of bending a portion in which the accommodating flange 200 of the header plate is to be formed toward the protruding direction of the accommodating flange 200, and is performed by pressing a portion of the body part 100.

At this time, the bending height of the primary molded part 201 formed by the beading process is preferably formed to a height of about 80% ~ 85% of the height formed by the final receiving flange 200. This takes into account the variation in the height due to the burring process and the variation in the height due to the bulging process in the future.

In particular, the inclination angle θ1 of the inner and outer sides with respect to the primary molded part 201 can be approximately 50 ° through the beading process, so that primary molding of the rounding part 210 of the receiving flange 20 is achieved. When the punch 310 is penetrated toward the outside of the primary molded part 201 from the inner portion of the primary molded part 201 in the course of the subsequent burring process in addition to being made by the beading process The leading edge to the molding unit 201 is to be made smoothly.

Next, when the beading process is completed, the circumferential end 120 for coupling with the header tank 10 by bending inward each edge portion of the body portion 100 through a bending process as shown in FIG. 6. ) To form.

At this time, the bending direction with respect to each circumferential end 120 of the body portion 100 is directed from the body portion 100 to the direction opposite to the protruding direction for the forming portion of the receiving flange 200 by the beading process. Do it.

Next, when the bending process is completed, the center portion of the primary molded part 201 bent by the beading process is pierced through a piercing process as shown in FIG. 7.

At this time, the piercing process is performed using a punch for piercing (not shown).

Next, when the piercing process is completed, the receiving flange 200 is formed by performing an extension of the primary molded part 201 through a burring process as shown in FIG. 8.

In this case, a forging press die is applied in the burring process. That is, since the forging method, which is a processing method of pushing a thick portion of the primary molded part 201 to the outside, rather than a burring process through a conventional punching method, is used, a gradual leading edge of the receiving flange 200 is possible, and thus processing Rupture at each corner of the way can be prevented.

Here, in the case of the punch 310 used in the forging press die, the front end is formed to have an inclined structure that gradually decreases in diameter toward the end thereof, and the rear end is formed to have a horizontal plane. In the case of the die 320 used in the press die, the inner circumferential surface of the inlet end portion into which the punch 310 is recessed is rounded, and the inner circumferential surface of the inner portion gradually narrows in the direction in which the receiving flange 200 protrudes. Losing is formed to have an inclined structure, the inclination angle is set to achieve approximately 1.5 ° ~ 2 °.

Therefore, as the burring process using the forging press die proceeds, molding of the receiving flange 200 having the outer wall surface formed by successively forming the rounding part 210 and the inclined part 220 is completed. As shown in FIG. 9.

Thereafter, the outer end portion of the receiving flange 200 is expanded by the bulging process to form the extension end 230, thereby completing the manufacture of the header plate having the shape as shown in FIGS. 2 to 4.

As a result, the accommodating flange 200 of the heat exchanger header plate manufactured through the above-described process has an advantage that the thermal durability can be improved because it is a structure protruding toward the opposite direction between the respective header plate.

In particular, the accommodating flange 200 is formed to gradually decrease in thickness toward the end thereof to be able to prevent the tear to the edge portion, in particular by expanding the end portion of the accommodating flange 200 through the bulging process Molding to form the stage 230 has the advantage that can be made smoothly.

10. Header tank 20. Square tube
100. Body 110. Tube receiving hole
120. Perimeter 200.Receiving Flange
210. Rounding section 220. Inclined section
230. Extended stage 310. Punch
320. Dice

Claims (5)

A body portion having a circumferential end bent inward for engagement with a header tank through which a working fluid flows while forming a plurality of tube receiving holes for communicating with a plurality of square tubes and forming an edge portion;
It comprises a receiving flange which is formed so as to project outward from the circumference of each tube receiving hole formed in the body toward the opposite side to the coupling direction with the header tank, the end of each square tube is accommodated,
The receiving flange
Header plate for a heat exchanger, characterized in that the thickness is gradually formed in the protruding direction from the portion in which the tube receiving hole formed in the body portion. The method of claim 1,
The inner wall surface of the receiving flange is formed to be perpendicular to the inner wall surface of the body portion, and the outer wall surface of the receiving flange is a rounded portion bent round from the outer wall surface of the body portion and from the end portion of the rounding portion to the end portion. A header plate for a heat exchanger, characterized in that the overall thickness is gradually made thinner while gradually forming an inclined portion inclined inward gradually. The method of claim 2,
The inclined portion of the receiving flange is a heat exchanger header plate, characterized in that formed to have an inclination angle of 1.5 ° ~ 2 °. The method according to any one of claims 1 to 3,
An end portion of the receiving flange is bent outwardly formed so that the opening width is gradually increased toward the outside. A beading step of bending a portion where a receiving flange of the header plate is to be formed;
Bending each edge of the header plate inward to form a circumferential end for coupling with the header tank;
A piercing step of allowing the center portion of the receiving flange bent by the beading step to be opened;
A burring process for protruding outwardly the receiving flange with the central portion opened;
Bulging process for extending the end of the receiving flange protruded outward by the burring process: is made to proceed sequentially,
The burring process
A method of manufacturing a header plate for a heat exchanger, characterized in that the inner wall surface of the receiving flange is formed vertically by using a forging press mold, and the outer wall surface is formed to protrude outwards as the thickness gradually decreases.

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