JP2008132572A - Heat exchanger and method of manufacturing same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To well assemble a radiator in a heat exchanger and a method of manufacturing the heat exchanger. <P>SOLUTION: In the radiator, fitting claw parts 53a, 53b bent to side wall parts 52a, 52b are prepared as a core plate 50a. A tank body 50b is disposed on the core plate 50a. The side wall parts 52a, 52b are bent to the projecting end 600 side of the tank body 50b. The projecting end 600 of the tank body 50b is locked by the fitting claw part 53a (53b). Consequently, when the side wall part 52a and the fitting claw part 53a (53b) are bent, the interference of the fitting claw part 53a (53b) with pipes 6a, 6b can be suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat exchanger and a manufacturing method thereof.

  2. Description of the Related Art Conventionally, a plurality of tubes through which engine cooling water flows and a header tank communicating with each of the plurality of tubes are provided. The header tank has a tank body and a core plate, and the core plate has a fitting claw portion. There is a vehicle-mounted radiator configured to be locked with respect to the tank body (see, for example, Patent Document 1).

In this, the tank main body is disposed on the bottom surface of the core plate, and then the side wall of the core plate is bent toward the tank main body with respect to the bottom surface, and the fitting claw is formed on the tank main body with respect to the side wall. Bend to the side. Thereby, the core plate can be fixed to the tank body by the fitting claw portion.
JP 2004-66283 A

  In the above-mentioned on-vehicle radiator, when a pipe (for example, a pipe for inflow or discharge of engine cooling water) is provided to the tank body, the side wall of the core plate is fitted to the tank body side. There are cases where the claw portion interferes with the pipe and the side wall portion of the core plate cannot be sufficiently bent.

  In addition to the pipe, when the mounting bracket for fixing the fan shroud is disposed on the tank body, the fitting claw portion interferes with the mounting bracket and the side wall portion of the core plate cannot be bent. There is a case.

  An object of this invention is to provide the heat exchanger which improved the assembly | attachment property, and its manufacturing method in view of said problem.

  In order to achieve the above object, in the present invention, a plurality of tubes (2) and header tanks (5a, 5b) are provided, and the header tank includes a tank body (50b) formed in a semi-cylindrical shape. A core plate (50a) to which a plurality of tubes are joined, and the core plate projects from the bottom surface portion (51) formed so as to cover the internal space of the tank body, and the tank Side wall portions (52a, 52b) formed to be bent toward the main body side, and formed to be bent with respect to the side wall portion before the side wall portion is bent toward the tank main body side, and locked to the tank main body. A heat exchanger manufacturing method comprising claw portions (53a, 53b), wherein the tank body is assembled to the core plate so as to cover the internal space of the tank body with the bottom surface portion. (S122) and, after this assembling step, there is a bending locking step (S124) in which the side wall portion is bent toward the tank body side with respect to the bottom surface portion, thereby locking the tank body with the claw portion. This is the first feature.

  Therefore, since the claw portion is formed to be bent with respect to the side wall portion before the side wall portion is bent toward the tank main body side, the side wall portion is provided on the tank main body when the side wall portion is bent toward the tank main body side with respect to the bottom surface portion. Since it can suppress that a nail | claw part interferes with the other member used, an assembly | attachment property can be improved.

  In the present invention, prior to the assembling process, there is a preceding folding step (S100) in which the side wall portion is folded toward the tank body side with respect to the bottom surface portion. The second feature is that the claw portion locks the tank body with the claw portion by further bending the tank body from the state.

  Accordingly, by bending the side wall portion in advance, the side wall portion can be easily bent in the folding and locking step, so that the locking operation by the claw portion to the tank body can be easily performed.

In the present invention, the core plate is formed so as to cover the inner space of the tank body, and to protrude from the bottom surface in the short direction of the tank body and be bent toward the tank body. It is arranged in the longitudinal direction of the tank body with respect to the short side wall portions (52a, 52b) and the bottom surface portion, protrudes independently from the bottom surface portion to the short side wall portion, and extends toward the tank main body side. Long side wall portions (52c, 52d) formed to be bent, and short side claw portions formed so as to protrude from the short side wall portion to the tank main body side and to be locked to the tank main body (53a, 53b) and a long side claw portion (53c, 53d) formed so as to protrude from the long side wall portion to the tank main body side and to be locked to the tank main body. Manufacturing method
By assembling the tank body to the core plate so as to cover the internal space of the tank body by the bottom surface portion (122), and bending the short side wall portion to the tank body side with respect to the bottom surface portion, A third feature is that it includes a bending locking step (S124) for locking the tank main body with the short side claw portion.

  Therefore, since the short side claw part is formed to be bent with respect to the short side wall part before the short side wall part is bent to the tank body side, the short side wall part is Since it can suppress that a short side nail | claw part interferes with the other member provided in a tank main body when bending to the tank main body side, an assembly | attachment property can be improved.

  In the present invention, the core plate has a bottom surface portion (51) formed so as to cover the internal space of the tank body, and side wall portions (52a, 52b) formed so as to protrude from the bottom surface portion and bend toward the tank body side. ) And claw portions (53a, 53b) formed so as to be bent with respect to the side wall portion before the side wall portion is bent toward the tank main body side, and the side wall portion toward the tank main body side with respect to the bottom surface portion. According to a fourth aspect of the present invention, the heat exchanger is configured to be bent with respect to the tank body by the claw portion.

  Therefore, since the claw portion is formed to be bent with respect to the side wall portion before the side wall portion is bent toward the tank main body side, the side wall portion is provided on the tank main body when the side wall portion is bent toward the tank main body side with respect to the bottom surface portion. Since it can suppress that a nail | claw part interferes with the other member used, an assembly | attachment property can be improved.

  According to the fifth aspect of the present invention, the core plate is provided with a bending base point for bending the side wall portion with respect to the bottom surface portion, and the bending base point is configured to have a weakened strength portion. Features.

  Thereby, a side wall part can be easily bent at a bending base point.

  The present invention includes a plurality of tubes (2) and header tanks (5a, 5b). The header tank includes a tank body (50b) and a core plate (50a). A bottom surface portion (51) formed so as to cover the internal space of the tank main body, and a short side wall portion protruding from the bottom surface portion in the short direction of the tank main body and bent to the tank main body side (52a, 52b) are arranged in the longitudinal direction of the tank main body with respect to the bottom surface, and are formed so as to protrude independently from the bottom surface to the short side wall and to be bent toward the tank main body. Long side wall portions (52c, 52d) and short side claw portions that are formed so as to be bent with respect to the short side wall portion before bending the short side wall portion and are locked to the tank body. (53c, 53d And a long side claw portion (53a, 53b) that is formed so as to protrude from the long side wall portion to the tank main body side and engages with the tank main body, the short side wall portion being the tank main body. A heat exchanger according to a sixth feature is configured to be bent with respect to the tank body by the short side claw portion by being bent to the side.

  Therefore, since the short side claw part is formed to be bent with respect to the short side wall part before the short side wall part is bent to the tank body side, the short side wall part is Since it can suppress that a short side nail | claw part interferes with the other member provided in a tank main body when bending to the tank main body side, an assembly | attachment property can be improved.

  Further, the present invention provides a support wall that protrudes from the bottom surface portion and is provided independently of the short side wall portions (52a, 52b) and is formed to support the long side wall portions (52c, 52d). A seventh feature is to provide the portion (610).

  Even if the tank body presses the long side wall portion due to thermal expansion, the long side wall portion can be supported by the support wall portion, so that deformation of the long side wall portion or the like can be suppressed.

The present invention may be configured as follows.
That is, according to the present invention, in the heat exchanger according to claim 15, a plurality of through-hole portions (56) to which the plurality of tubes are respectively joined to a bottom surface portion of the core plate, and the plurality of through-holes An annular flat surface portion (57) formed so as to surround the portion;
A protruding portion (rib) formed so as to protrude from the annular flat surface portion and having the through-hole portion, and
The sealing material is sandwiched between the annular flat surface portion and the tank body.

  In addition, the code | symbol in the bracket | parenthesis of each means described in a claim and this column shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
1 to 4 show a first embodiment in which a heat exchanger according to the present invention is applied to a radiator 1 of an automobile. FIG. 1 is a front view of the radiator 1 of the present embodiment as viewed from the air flow direction.

  The radiator 1 of this embodiment is a heat exchanger that is disposed in an engine room and cools engine cooling water with air blown from a blower.

  As shown in FIG. 1, the radiator 1 includes a plurality of tubes 2, fins 3, side plates 4a and 4b, and header tanks 5a and 5b.

  The plurality of tubes 2 are flat tubes through which engine coolant flowing out from the engine flows, and these tubes 2 are made of a light metal having a high thermal conductivity such as an aluminum alloy. In the present embodiment, as a member constituting the tube 2, a clad material whose front surface (or back surface) is coated with a filler material is used.

  The fins 3 are joined to the outer surface of the tube 2 to increase the heat transfer area with the cooling air and promote heat exchange between the air and the engine coolant. As the fin 3 according to the present embodiment, a corrugated fin that is roller-shaped in a wave shape as viewed from the flow direction with the cooling air is employed. The fins 3 together with the plurality of tubes 2 constitute a substantially rectangular core portion 4 that cools the engine coolant.

  The side plates 4 a and 4 b are arranged so as to sandwich the end portion of the core portion 4, and extend in a direction parallel to the longitudinal direction of the tube 2 to reinforce the core portion 4. The side plates 4a and 4b are made of a light metal such as an aluminum alloy.

  The header tanks 5a and 5b are located at both ends in the longitudinal direction of the tube 2 and extend in a direction orthogonal to the longitudinal direction of the tube 2 to communicate with each tube 2. In this embodiment, the header tank 5a is an engine The header tank 5b collects the engine cooling water cooled (ie, heat exchanged) by the core portion 4 from each tube 2 and supplies it to the engine. It is something to return.

  Here, the introduction pipe 6a is connected to the engine cooling water outflow side of the engine, and the outlet pipe 6b is connected to the engine cooling water inflow side of the engine.

  The header tanks 5a and 5b have substantially the same structure (except for the pipes 6a and 6b). Hereinafter, the structure of the header tank 5a will be described as a representative example.

  2 is a cross-sectional view taken along the line 2′-2 ′ of FIG. 1, FIG. 3 is a perspective view showing an intermediate portion 3 ′ (and a space inside the tank) of the header tank 5a in FIG. 1, and FIG. It is an expansion perspective view of edge part 4 'of the header tank 5a.

  As shown in FIG. 2 (or FIG. 3), the header tank 5a has a core plate 50a and a tank body 50b that forms a tank internal space 50c together with the core plate 50a.

  The tank main body 50b is made of a resin material, and as shown in FIG. 3, the tank main body 50b forms a tank inner space 50c and is formed in a semi-cylindrical shape extending in the direction in which the tubes 2 are arranged. As shown in FIG. 4, side wall portions 500 are provided at both end portions in the longitudinal direction of the tank body 50b.

  In addition, as shown in FIG. 2, a protruding end 600 is formed in the tube longitudinal direction of the tank body 50b, and the protruding end 600 is perpendicular to the tube longitudinal direction (ie, It is formed in an annular shape so as to protrude in the tank longitudinal direction and the tank short direction and surround the tank internal space 50c. The axial direction of the tank main body 50b coincides with the arrangement direction of the tubes 2 described later, and hereinafter, the axial direction of the tank main body 50b is simply referred to as a tank longitudinal direction.

  The core plate 50a is made of an aluminum alloy, and the core plate 50a includes a bottom surface portion 51 and side wall portions 52a and 52b as shown in FIG. 2 (or FIG. 3). The bottom surface portion 51 is a rectangular plate member extending in the tank longitudinal direction, and is formed so as to cover the tank internal space 50c of the tank body 50b.

  The side wall portions 52a and 52b are respectively disposed on both sides in the tank short direction with respect to the bottom surface portion 51, and the side wall portions 52a and 52b are formed so as to extend from the bottom surface portion 51 to both sides in the tube longitudinal direction. Yes. The tank lateral direction is a direction orthogonal to the tank longitudinal direction and the tube longitudinal direction.

  The core plate 50a is provided with fitting claws 53a and 53b, and the fitting claws 53a and 53b are formed so as to protrude from the side walls 52a and 52b to the tank body 50b side. Here, the fitting claw portion 53a (53b) is formed so as to extend over the tank longitudinal direction of the side wall portion 52a (52b).

  Further, as shown in FIG. 4 (the side wall portion 52d and the fitting claw portion 53d are omitted), the core plate 50a includes side wall portions 52c and 52d and fitting claw portions 53c and 53d. .

  The side wall parts 52c and 52d are respectively arranged on both sides in the tank longitudinal direction with respect to the bottom surface part 51, and the side wall parts 52c and 52d are formed so as to extend from the bottom surface part 51, respectively. That is, the side wall parts 52c and 52d are formed independently of the side wall parts 52c and 52d. The fitting claws 53c and 53d are formed so as to protrude from the side walls 52c and 52d toward the tank body 50b.

  5A is a front view of the core plate 50a alone viewed from the longitudinal direction of the tube 2, FIG. 5B is a right side view of the core plate 50a, and FIG. 6 is 6′-6 ′ in FIG. 5A. A cross-sectional view is shown.

  As shown in FIG. 5A, the bottom surface portion 51 is provided with a plurality of through holes 56, and the plurality of through holes 56 are arranged in a line in the tank longitudinal direction. The plurality of through holes 56 are provided for joining the plurality of tubes 2 and the side plates 4a and 4b, as shown in FIGS.

  The bottom surface portion 51 is provided with an annular flat surface portion 57, and the annular flat surface portion 57 is formed in an annular shape so as to surround a plurality of through holes 56 as indicated by a chain line arrow E in FIG.

  Here, the bottom surface portion 51 is formed with a plurality of protrusions (ribs) formed so as to protrude from the annular flat surface portion, and the plurality of protrusions (ribs) are arranged in a line in the tank longitudinal direction. ing. A through hole 56 is formed on the tip side of each of the plurality of protrusions (ribs).

  A plurality of through-holes 58 are provided on both sides of the tank 51 in the short side direction with respect to the respective through-holes 56 in the bottom portion 51, and the plurality of through-holes 58 form weakened strength portions in the tank longitudinal direction. They are arranged in a line. The plurality of through holes 58 constitute bending base points when the side wall portions 52 a and 52 b are bent with respect to the bottom surface portion 51.

  The plate material constituting the core plate 50a uses a clad material in which the surface into which the tube is inserted is coated with the filler material, and the plate material constituting the side plates 4a and 4b is made of the filler material on the surface in contact with the tube. Coated clad material is used.

  Further, a sealing material 54 is sandwiched between the annular flat surface portion 57 of the bottom surface portion 51 of the core plate 50a and the protruding end portion 600 of the tank body 50b, and the sealing material 54 is connected to the annular flat surface portion 57. The space between the projecting ends 600 is sealed to prevent the engine coolant from leaking from the tank internal space 50c.

  In the present embodiment, the sealing material 54 is obtained by curing a liquid or gel sealing material. As the sealing material, for example, an acrylic resin that is cured by ultraviolet rays is used. In particular, the sealing material 54 is preferably a resin that is less deteriorated than the antifreeze. The sealing material 54 is not limited to an ultraviolet curable resin, and a thermosetting resin that is cured by heat can be used.

  Next, a method for manufacturing the radiator 1 according to this embodiment will be described with reference to FIG. FIG. 7 is a process showing the flow of the manufacturing process of the radiator 1.

  First, a plurality of tubes 2, a core plate 50a, fins 3, and side plates 4a and 4b are prepared (S100). This process corresponds to the preceding folding process and the wall folding process in the claims.

  Next, a method for manufacturing the core plate 50a will be described with reference to FIG.

  First, as shown in FIG. 8A, an aluminum alloy plate member 100 is prepared. Next, as shown in FIG. 8B, the through holes 56 and 58 are formed in the plate member 100. . Then, as shown in FIG.8 (c), the site | part corresponded to the fitting nail | claw parts 53a and 53b of the left-right both sides in the figure among the board members 100 is bend | folded perpendicularly | vertically.

  Next, as shown in FIG. 8D, the portions corresponding to the side wall portions 52 a and 52 b of the plate member 100 are bent with respect to the bottom surface portion 51 until a predetermined angle θ (<90 degrees) is reached.

  Next, the portions corresponding to the side wall portions 52 c and 52 d in the plate member 100 are bent at a right angle with respect to the bottom surface portion 51. However, at this time, the fitting claws 53c and 53d are not bent with respect to the side walls 52c and 52d.

  Next, the core part 4 is assembled (S110).

  Specifically, after the fins 3 are loaded between the plurality of tubes 2 arranged at predetermined intervals and the core portion 4 is temporarily assembled, each core hole 4 is inserted into each through hole 56 of the core plate 50a of the header tank 5a. The tube 2 and the side plates 4a and 4b are inserted.

  Next, the inner diameter of one end portion of the tube 2 in the longitudinal direction (that is, a portion of the tube 2 that reaches the portion corresponding to the tank internal space 50c through the core plate 50a) is enlarged, and the tube 2 is The tube 2 and the core plate 50a are temporarily fixed by expanding the tube.

  Next, the tubes 2 and the side plates 4a and 4b are inserted into the through holes of the core plate 50a of the header tank 5b. Accordingly, the inner diameter of the other end portion in the longitudinal direction of the tube 2 is enlarged, and the tube 2 is expanded to temporarily fix each tube 2 and the core plate 50a of the header tank 5b.

  As a result, the temporary fixing (temporary assembly) of the core plates 50a, the tubes 2, the fins 3, and the side plates 4a and 4b of the header tanks 5a and 5b is completed, and this state is held by the jig and is kept in the furnace. The tube 2, the fin 3, the insert 4a and the core plates 50a of the header tanks 5a and 5b are integrally joined by brazing.

  Next, a liquid (or gel-like) sealing material is applied to the annular flat surface portion 57 of the core plate 50a, and the applied gel-like sealing material 54 is irradiated with ultraviolet rays and cured (S121). . This step corresponds to the coating / curing step described in the claims.

  Shifting to the next tank arrangement step (S122), the tank main body 50b is arranged on the core plate 50a, and the inner space 50c of the tank main body 50b is covered by the bottom surface portion 51 of the core plate 50a (see FIG. 9).

  At this time, the side wall portions 52a and 52b of the core plate 50a are bent to a predetermined angle θ (<90 degrees) with respect to the bottom surface portion 51 as shown in FIG. Furthermore, the fitting claws 53a and 53b are bent at right angles to the side walls 52a and 52b, respectively. Further, the side wall portions 52 c and 52 d are bent at a right angle with respect to the bottom surface portion 51.

  Next, as shown by an arrow F in FIG. 10B, the tank body 50b is held in the tube longitudinal direction by a jig (S123).

    Next, the fitting claws 53c and 53d in the tank longitudinal direction are respectively crimped (S124: claw bending process). Specifically, the fitting claw 53c is pressed against the side wall 52c toward the tank body 50b as shown by an arrow H in FIG. The fitting claw 53d is bent toward the tank body 50b with respect to the side wall 52d.

  As a result, the protruding end portion 600 of the tank body 50b is locked by the fitting claw portion 53c (53d). Then, as shown in FIG. 4, the sealing material 54 is sandwiched between the protruding end portion 600 of the tank body 50b and the annular flat portion 57 of the core plate 50a.

  Thereafter, the side walls 52a and 52b are caulked. That is, the side walls 52a and 52b are pressed as shown by the arrow G and bent into the protruding end 600 of the tank body 50b, respectively (S125). This step corresponds to the folding locking step described in the claims.

  As a result, as shown in FIG. 10C, the protruding end portion 600 of the tank body 50b and the sealing material 54 are sandwiched between the annular flat surface portion 57 of the core plate 50a and the fitting claw portion 53a (53b). It becomes a state. That is, the protruding end portion 600 of the tank body 50b is locked by the fitting claw portion 53a (53b).

  Thereafter, the restraining in the tube longitudinal direction with respect to the tank body 50b is released (S126). Thereby, manufacture of the header tank 5a is completed. Next, the header tank 5b is manufactured by the same manufacturing method.

  In the present embodiment described above, the core plate 50a is prepared in such a state that the fitting claws 53a and 53b are bent in advance with respect to the side wall portions (short side wall portions) 52a and 52b. The tank body 50b is disposed with respect to the plate 50a, and the side wall portions 52a and 52b are bent toward the protruding end portion 600 of the tank body 50b. As a result, the projecting end portion 600 of the tank body 50b is locked by the fitting claw portion 53a (53b).

  In the prior art, when the fitting claws 53a (53b) are bent after the side walls 52a and 52b are bent, the fitting claws 53a (53b) are connected to the pipes 6a and 6b as shown in FIG. The fitting claw portion 53a (53b) may not be bent due to interference.

  Further, the dimension between the pipes 6a and 6b and the protruding end portion 600 of the tank main body 50b cannot be sufficiently secured, and the caulking jig does not enter between the protruding end portions 600 of the tank main body 50b. The portion 53a (53b) may not be bent.

  For this reason, in the prior art, in order to arrange the pipe 6a (6b) at a position away from the bottom surface portion 51 of the core plate 50a, it is necessary to increase the height dimension of the tank body 50b (that is, the dimension in the tube longitudinal direction). was there.

  On the other hand, in the present embodiment, the core plate 50a is used in a state where the fitting claws 53a and 53b are bent in advance, and therefore when the fitting claws 53a (53b) are bent. It is possible to prevent the fitting claw portion 53a (53b) from interfering with the pipes 6a and 6b. Thereby, assembly | attachment property can be improved.

  Further, since it is not necessary to insert a caulking jig between the pipes 6a and 6b and the protruding end portion 600 of the tank main body 50b, it is necessary to increase the height dimension of the tank main body 50b (that is, the dimension in the tube longitudinal direction). There is no.

  In the present embodiment, as the core plate 50a, one in which the side walls 52a and 52b are bent to a predetermined angle θ (<90 degrees) with respect to the bottom 51 before use with the tank body 50b is used. It has been. For this reason, after arrange | positioning the tank main body 50b with respect to the core plate 50a, when the side wall parts 52a and 52b are each bend | folded to the protruding edge part 600 side of the tank main body 50b, the bending becomes easy.

  In particular, in the core plate 50a, a plurality of through holes 58 forming a weakened strength portion are arranged in a line to form a bending base point. For this reason, it is possible to bend the side wall parts 52a and 52b easily. Since the plurality of through holes 58 are arranged outside the tank internal space 50 c with respect to the sealing material 54, the engine coolant does not leak from the plurality of through holes 58.

  In the present embodiment, as the sealing material 54, a material obtained by applying a liquid or gel sealing material to the annular flat surface portion 57 of the core plate 50a and curing it is used. For this reason, the cured sealing material 54 has adhesiveness, and is in close contact with the annular flat portion 57 of the core plate 50a due to the adhesiveness. For this reason, the sealing material 54 is not twisted or displaced.

  Further, the sealing material 54 is elastically deformed and sandwiched between the annular flat surface portion 57 of the core plate 50a and the protruding end portion 600 of the tank body 50b. Therefore, since the space between the annular flat portion 57 of the core plate 50a and the protruding end portion 600 of the tank body 50b is well sealed, it is possible to prevent leakage of engine cooling water.

  In the first embodiment described above, the example in which the sealing material is applied to the annular flat surface portion 57 of the core plate 50a has been described. Instead, the sealing material is applied to the protruding end portion 600 of the tank body 50b. May be applied.

  In the first embodiment described above, the example in which the plurality of through holes 58 are provided at the bending base point to form the weakened strength portion is described, but the present invention is not limited thereto, and a groove portion may be provided. Or you may make it form an intensity | strength weak part using a cross-sectional V-shaped recessed part and a cross-sectional U-shaped recessed part.

  In the first embodiment described above, the core plate 50a is such that the short-side fitting claws 53a and 53b are previously bent with respect to the side wall portions (short side wall portions) 52a and 52b. However, the present invention is not limited to this, and the core plate 50a is one in which the long-side fitting claws 53c and 53d are bent in advance with respect to the side wall portions (longitudinal side wall portions) 52c and 52d. It may be used.

(Second Embodiment)
In the first embodiment described above, the materials of the core plate 50a (aluminum alloy) and the tank body 50b (resin) are different, and the linear expansion coefficient of the tank body 50b is larger than the linear expansion coefficient of the core plate 50a. For this reason, in the high temperature state, there is a possibility that the side walls 52c and 52d of the core plate 50a are pressed and deformed in the tank longitudinal direction due to expansion of the tank body 50b in the tank longitudinal direction.

  On the other hand, in the second embodiment, as shown in FIGS. 12 and 13, a support wall portion 610 that supports the side wall portion 52c (52d) of the core plate 50a is provided.

  13 is an enlarged perspective view of the longitudinal end of the header tank 5a, FIG. 13 (a) is a front view of the core plate 50a alone viewed from the tube longitudinal direction, and FIG. 13 (b) is a right side view of the core plate 50a alone. is there.

  Here, the support wall portion 610 is formed so as to protrude from the bottom surface portion 51 on both sides in the tank short direction with respect to the bottom surface portion 51. In addition to this, the support wall portions 610 are respectively formed at both ends of the tank in the longitudinal direction so as to be continuous with the side wall portions 52c (52d).

  Thereby, even if the side wall part 52c (52d) of the core plate 50a is pressed by the expansion of the tank body 50b, the side wall part 52c (52d) can be supported by the two support wall parts 610.

  Also in this embodiment, as shown in FIG. 14, the core plate 50a is used in a state where the fitting claws 53a and 53b are bent in advance with respect to the side walls 52a and 52b.

(Third embodiment)
In the above-described first embodiment, the example in which the angle formed by the side wall portion 52a and the fitting claw portion 53a of the core plate 50a is a right angle has been described. As shown in FIG. 15, the angle φ1 formed by the side wall portion 52a and the fitting claw portion 53a is set to an acute angle (φ1 <90 °) in a state where the side wall portion 52a of the core plate 50a is bent. Thereby, the force which joins the tank main body 50b with the core plate 50a can be increased.

(Fourth embodiment)
In the above-described first embodiment, the example in which the angle φ2 for bending the side wall portion 52a of the core plate 50a with respect to the bottom surface portion 51 is set to be a right angle has been described. As shown in FIG. 16, the angle φ2 at which the side wall portion 52a of the core plate 50a is bent with respect to the bottom surface portion 51 is larger than the right angle (φ2> 90 °). Thereby, the force which joins the tank main body 50b with the core plate 50a can be increased.

(Fifth embodiment)
In the above-described first embodiment, the example in which the annular flat surface portion 57 is provided on the bottom surface portion 51 of the core plate 50a and the sealing material 54 is applied to the annular flat surface portion 57 has been described. In the embodiment, a groove portion 57a is provided on the bottom surface portion 51, and a seal material 54 is applied to the groove portion 57a. Also in this case, as the core plate 50a, the one having the fitting claw 53a (53b) bent in advance with respect to the side wall 52a (52b) is used.

(Other embodiments)
In each of the above-described embodiments, the example in which the sealing material 54 is cured after being applied to the core plate 50a has been described. Instead, the sealing material 54 is cured simultaneously with the application to the core plate 50a. Also good.

  In this case, while applying the sealing material 54 to the core plate 50a, the sealing material 54 is irradiated with ultraviolet rays.

  The sealing material 54 may be applied to the core plate 50a at the same time as applying the heat to the sealing material 54 to be cured.

  In each of the above-described embodiments, the example in which the liquid or gel-like sealing material 54 is applied to the core plate 50a after brazing the plurality of tubes 2 to the core plate 50a has been described. Before brazing the plurality of tubes 2 to the core plate 50a, a liquid or gel-like sealing material 54 may be applied to the sealing surface 51c of the core plate 50a.

  In each of the above-described embodiments, an example in which the heat exchanger according to the present invention is applied to a radiator has been described. If present, the present invention may be applied to various heat exchangers such as an evaporator and a heater core unit. In this case, fluid other than engine coolant may be used as the fluid.

It is a figure which shows the structure of 1st Embodiment of the radiator which concerns on this invention. It is 2'-2 'sectional drawing of FIG. FIG. 3 is an enlarged perspective view of a 3 ′ portion in FIG. 1. It is an expansion perspective view of 4 'part in FIG. It is a figure which shows the core plate of FIG. FIG. 6 is a cross-sectional view taken along 6'-6 'in FIG. It is a flowchart which shows the manufacturing process of the radiator of FIG. It is a figure which shows the manufacturing process of the core plate of FIG. It is a perspective view which shows the side wall part and fitting nail | claw part of the core plate of FIG. It is a figure which shows the procedure which bends the side wall part of the core plate of FIG. It is a figure which shows the problem which arises when bending the side wall part of the conventional core plate. It is a perspective view which shows a part of radiator of 2nd Embodiment of this invention. It is a figure which shows the core plate of FIG. It is a figure which shows a part of header tank of FIG. It is a perspective view which shows a part of core plate and tank main body of the radiator of 3rd Embodiment of this invention. It is a perspective view which shows a part of core plate and tank main body of the radiator of 4th Embodiment of this invention. It is a perspective view which shows a part of core plate and tank main body of the radiator of 5th Embodiment of this invention.

Explanation of symbols

2 ... tube, 3 ... fin, 4a, 4b ... side plate,
5a, 5b ... header tank, 50b ... tank body,
50a ... Core plate, 51c, 53 ... Sealing surface, 54 ... Sealing material.

Claims (15)

A plurality of tubes (2) through which fluid flows;
A header tank (5a, 5b) disposed in the longitudinal direction of the tube and communicating with each of the plurality of tubes;
The header tank includes a tank body (50b) formed in a semi-cylindrical shape, and a core plate (50a) to which the plurality of tubes are respectively joined.
The core plate includes a bottom surface portion (51) formed so as to cover the internal space of the tank body, and side wall portions (52a, 52b) formed so as to protrude from the bottom surface portion and bend toward the tank body side. And claw portions (53a, 53b) that are formed so as to be bent with respect to the side wall portion before the side wall portion is bent toward the tank main body, and are latched with respect to the tank main body. A method of manufacturing an exchanger,
An assembly step (S122) of assembling the tank body to the core plate so as to cover the internal space of the tank body by the bottom surface portion;
After this assembling step, a folding locking step (S124) in which the side wall portion is bent toward the tank main body to lock the tank main body with the claw portion;
A method for producing a heat exchanger, comprising: Prior to the assembly step, there is a preceding folding step (S100) of bending the side wall portion to the tank body side with respect to the bottom surface portion,
In the folding and locking step, the side wall portion is further bent to the tank body side from the state bent in the preceding folding step, and is thereby locked to the tank body by the claw portion. The manufacturing method of the heat exchanger of Claim 1 to do. 3. The manufacturing of a heat exchanger according to claim 1, wherein, in the bending locking step, the side wall portion is bent toward the tank main body to a bend angle of 90 degrees or more with respect to the bottom surface portion. Method. In the folding and locking step, the side wall is bent toward the tank main body so that the claw portion is locked to the tank main body in an acute angle with the side wall. The manufacturing method of the heat exchanger as described in any one of Claim 1 thru | or 3. Before the assembling step, a coating / curing step (S121) for applying and curing a liquid sealing material on either the core plate or the tank body;
The tank body is assembled to the core plate so that the sealing material is sandwiched between the core plate and the tank body in the assembly process after the coating / curing process. 5. A method for producing a heat exchanger according to any one of 4 above. A plurality of tubes (2) arranged in a predetermined direction and through which a fluid flows;
A header tank (5a, 5b) disposed in the longitudinal direction of the tube and communicating with each of the plurality of tubes;
The header tank includes a tank body (50b) formed in a semi-cylindrical shape extending in the tube arrangement direction, and a core plate (50a) to which the plurality of tubes are respectively joined.
The core plate is
A bottom surface portion (51) formed to cover the internal space of the tank body;
Short side wall portions (52a, 52b) formed so as to protrude from the bottom surface portion in the short direction of the tank main body and bend to the tank main body side;
Longitudinal side wall that is arranged in the longitudinal direction of the tank body with respect to the bottom surface part, protrudes independently from the bottom surface side to the short side wall part, and is bent to the tank body side Part (52c, 52d),
Short side claws (53a, 53b) that are formed so as to protrude from the short side wall portion toward the tank main body and are locked to the tank main body,
A method of manufacturing a heat exchanger, comprising: long claw portions (53c, 53d) formed so as to protrude from the long side wall portion to the tank main body side and locked to the tank main body. ,
An assembling step (S122) for assembling the tank body with the core plate so as to cover the internal space of the tank body with the bottom surface portion;
A bending locking step (S124) in which the short side wall portion is bent with respect to the tank main body by the short side claw portion by bending the short side wall portion toward the tank main body side with respect to the bottom surface portion;
A method for producing a heat exchanger, comprising: Before the assembly step, a wall portion bending step (S100) for bending the longitudinal side wall portion (52c, 52d),
After the assembling step, the claw portion bending step (S125) for engaging the tank body with the long side claw portion by bending the long side claw portion with respect to the long side wall portion;
The method for manufacturing a heat exchanger according to claim 6, comprising: A plurality of tubes (2) through which fluid flows;
A header tank (5a, 5b) disposed in the longitudinal direction of the tube and communicating with each of the plurality of tubes;
The header tank includes a tank body (50b) formed in a semi-cylindrical shape, and a core plate (50a) to which the plurality of tubes are respectively joined.
The core plate includes a bottom surface portion (51) formed so as to cover the internal space of the tank body, and a side wall portion (52a, 52a, 52b) formed so as to protrude from the bottom surface portion and bend toward the tank body side. 52b) and claw portions (53a, 53b) formed to be bent with respect to the side wall portion before the side wall portion is bent toward the tank body side,
A heat exchanger configured to be engaged with the tank body by the claw portion by bending the side wall portion toward the tank body side with respect to the bottom surface portion. The core plate is provided with a bending base point for bending the side wall portion with respect to the bottom surface portion,
The heat exchanger according to claim 8, wherein the bending base point is configured to have a strength weakened portion. The heat exchanger according to claim 9, wherein the weakened strength portion is a groove portion. The heat exchanger according to claim 9, wherein the weakened strength portion is a plurality of recesses or holes provided intermittently. A plurality of tubes (2) arranged in a predetermined direction and through which a fluid flows;
A header tank (5a, 5b) disposed in the longitudinal direction of the tube and communicating with each of the plurality of tubes;
The header tank includes a tank body (50b) formed in a semi-cylindrical shape extending in the tube arrangement direction, and a core plate (50a) to which the plurality of tubes are respectively joined.
The core plate is
A bottom surface portion (51) formed to cover the internal space of the tank body;
Short side wall portions (52a, 52b) formed so as to protrude from the bottom surface portion in the short direction of the tank main body and bend to the tank main body side;
Longitudinal side wall that is arranged in the longitudinal direction of the tank body with respect to the bottom surface part, protrudes independently from the bottom surface side to the short side wall part, and is bent to the tank body side Part (52c, 52d),
Short side claws (53c, 53d) that are formed so as to be bent with respect to the short side wall before bending the short side wall, and are locked to the tank body;
Long side claw portions (53a, 53b) that are formed so as to protrude from the long side wall portion to the tank main body side and engage with the tank main body,
A heat exchanger configured to be bent with respect to the tank main body by the short side claw part by bending the short side wall part to the tank main body side. A support wall portion (610) protruding from the bottom surface portion and provided independently of the short side wall portions (52a, 52b) and configured to support the long side wall portions (52c, 52d). The heat exchanger according to claim 12, further comprising: The heat exchanger according to claim 12 or 13, wherein the short side claw portions (53a, 53b) are formed to extend in a longitudinal direction of the tank body. A sealing material is provided that is sandwiched between the tank body and the bottom surface of the core plate and seals between the tank body and the bottom surface of the core plate.
15. The sealing material according to claim 8, wherein a liquid sealing material is applied and cured on one of the bottom surface of the tank body and the core plate. Heat exchanger.

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