JP3546972B2 - Manufacturing method of pipe with partition - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a method of manufacturing a pipe with a partition in which a partition is formed in a pipe, and a method of manufacturing a header for a heat exchanger with a partition in which a partition is formed in a header.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a heat exchanger such as a condenser, for example, as disclosed in Japanese Utility Model Application Laid-Open No. 4-63682, a partition is provided in a header to change a fluid flow path.
Conventionally, this type of header for a heat exchanger with a partition has been manufactured as described below.
[0003]
First, as shown in FIG. 26A, a pipe material of an aluminum alloy having an outer surface clad with a brazing material is cut into a predetermined size, and a pipe 11 for a header is obtained.
Thereafter, as shown in (b), a tube insertion hole 13, a divide slit 15, a fluid inlet 17, and a fluid outlet 19 are formed in the pipe 11.
[0004]
Next, as shown in (c), a divide 21 of an aluminum alloy clad with a brazing material on both sides is inserted into the slit 13 for the divide, and a patch 23 of an aluminum alloy is pressed into both ends of the pipe 11. .
When manufacturing a heat exchanger in which the refrigerant makes one U-turn in the heat exchanger, an aluminum alloy tube with a brazing material clad on an outer surface (not shown) and an aluminum alloy with no brazing material clad are used. A tube insertion hole 13 of the pipe 11 is fitted to one end of the tube of the core portion in which alloy fins are alternately stacked, and a tube insertion hole of a header having no partition is fitted to the other end. Temporarily fix with a non-corrosive flux and heat it in a furnace, or heat it in a vacuum furnace without applying flux, braze the tube and fin together with pipe 11 and divide 21, Patch 23 and tube are brazed.
[0005]
[Problems to be solved by the invention]
However, in such a conventional header for a heat exchanger with a partition, an expensive pipe material formed in advance into a cylindrical shape is used, so that there is a problem that the material cost increases.
Further, there is a problem that a brazing failure between the pipe 11 and the divide 21 occurs.
[0006]
This uses an aluminum alloy in which the divide 21 is inserted into the slit 15 of the pipe 11 and the divide 21 is clad with a brazing material on both sides to braze the divide 21 and the inner surface of the pipe 11 with the divide 21. However, when the brazing material on the outer surface of the pipe 11 is drawn to the brazing portion between the tube insertion hole 13 of the pipe 11 and the tube during brazing, the brazing material of the divide 21 and the brazing material of the bip 11 It is considered that the brazing material of the divide 21 is also drawn out because of the contact of
[0007]
The present invention has been made in order to solve such a conventional problem, and a method of manufacturing a pipe with a partition that can obtain a pipe in which a partition portion is integrally formed from a plate material, and a method of partitioning using the manufacturing method. An object of the present invention is to provide a method for manufacturing a header for a heat exchanger.
[0008]
[Means for Solving the Problems]
The method for producing a pipe with a partition according to claim 1, wherein a flat plate is formed, a pair of half-tubular portions are formed in parallel via a connecting portion, and a U-shape protruding inward from the pair of half-tubular portions. A forming step of forming a partition forming part, a cutting step of cutting at least the connecting part located between the partition forming parts, and a compression step of compressing the partition forming part from both sides to form a half-partition part. An opposing step of projecting the connecting portion from the inside and opposing the pair of half-cylindrical portions; a mating step of joining the pair of half-cylindrical portions in the opposing state; and the pair of half-cylindrical portions. And a bonding step of bonding to each other.
[0009]
In the method for manufacturing a header for a partitioned heat exchanger according to claim 2, a flat plate is formed, and a pair of half-tubular portions are formed in parallel via a connecting portion, and project inward to the pair of half-tubular portions. A forming step of forming a U-shaped partition forming section, a cutting step of cutting at least the connecting portion located between the partition forming sections, and forming the half-divided section by compressing the partition forming section from both sides. A compression step, a step of forming a tube insertion hole in the one half-cylindrical part, an opposing step of projecting the connecting portion from the inside and opposing the pair of half-cylindrical parts, and a pair of the opposing states. And a joining step of joining the pair of half-split tubular portions and the half-split partitions to each other.
[0010]
The method for producing a pipe with a partition or the method for producing a header for a heat exchanger with a partition according to claim 3 is the method according to claim 1 or 2, wherein the flat plate is made of aluminum on which a brazing material layer is formed. The pair of half-split cylindrical portions and the half-split partitions are brazed to each other.
According to a fourth aspect of the present invention, there is provided a method of manufacturing a header for a heat exchanger with a partition, wherein a flat plate is formed into a half-tubular shape to form a one-side half-tubular portion, and the one-side half-tubular portion projects inward. A one-side member manufacturing process of forming a side partition to obtain a one-side half-tubular member, and forming the other half-tubular portion by forming a flat plate into a half-tubular shape; The other-side member manufacturing step of forming the other-side partition part protruding inward in the shape part to obtain the other-side half-tubular member, and the step of forming a tube insertion hole in the other-side half-tubular member, The one-side half-tubular member and the other-side half-tubular member are attached to each other, and the one-side half-tubular member and the other-side half-tubular member have an open end and one-side partition and the other side. And a joining step of joining the contact portions with the partition portion to each other.
[0011]
According to a fifth aspect of the present invention, in the method for manufacturing a header for a partitioned heat exchanger according to the fourth aspect, in the other-side member manufacturing step, the flat plate is formed into a half-split cylindrical shape to form the other-side half-split tubular portion. A forming step of forming a U-shaped partition molded part protruding inward on the other half cylinder part; a cutting step of cutting edges located on both sides of the partition molded part; And a compression step of forming the other-side partition portion by compressing the other side.
[0012]
According to a sixth aspect of the present invention, in the method of manufacturing a header for a partitioned heat exchanger according to the fourth or fifth aspect, in the one-side member manufacturing step, a flat plate is formed into a half-split cylindrical shape to form a one-side half-split cylindrical part. A forming step of forming a U-shaped partition molded portion projecting inward from the one-sided half cylindrical portion, a cutting step of cutting edges located on both sides of the partition formed portion, and the partition forming portion From the both sides to form the one-sided partition.
[0013]
According to a seventh aspect of the present invention, in the method of manufacturing a header for a partitioned heat exchanger according to any one of the fourth to sixth aspects, the flat plate is made of aluminum on which a brazing material layer is formed, and in the joining step, the one-side half-tubular member is used. And an open end of the other half-tubular member and an abutting portion of the one-side partition and the other-side partition are brazed to each other.
[0014]
[Action]
In the method for manufacturing a pipe with a partition according to the first aspect, a half-partition is formed by compressing a U-shaped partition formed part formed on each of the pair of half-cylindrical parts from both sides. By joining the cylindrical portions, the half-partition portions are joined to form a partition portion.
[0015]
In the method for manufacturing a header for a heat exchanger with a partition according to claim 2, a U-shaped partition formed portion formed on each of the pair of half-tubular portions is compressed from both sides to form a half-divided portion. The half-partitioned cylindrical portions are combined to form the half-partitioned portions to form a partition portion.
In addition, a tube insertion hole is formed in one half of the cylindrical portion.
[0016]
In the method for producing a pipe with a partition or the header for a heat exchanger with a partition according to claim 3, the pair of half-split tubular portions and the half-split portion are securely joined by brazing, so that the heat medium does not leak. .
In the method for manufacturing a header for a heat exchanger with a partition according to claim 4, the one-side half-tubular member on which the one-side partition portion obtained by forming the plate is formed, and the other side obtained by forming the plate. Abutting the other half-tubular member on which the partition is formed, the open end of the one-half cylinder and the other half-cylindrical member and the one-side partition and the other partition. Are joined to each other to form a partition.
[0017]
In the method of manufacturing a header for a heat exchanger with a partition according to claim 5, the other-side partition portion is formed by compressing the partition-formed portion formed in the other-side half-tubular portion from both sides.
[0018]
In the method for manufacturing a header for a heat exchanger with a partition according to claim 6, the one-side partition is formed by compressing the partition formed portion formed in the one-side half-tubular portion from both sides.
In the method of manufacturing a header for a heat exchanger with a partition according to claim 7, the opening end of the one-side half-tubular member and the other-side half-tubular member, and the contact portion between the one-side partition and the other-side partition. Are brazed to each other.
[0019]
【Example】
Hereinafter, the method of the present invention will be described in detail with reference to the drawings.
FIGS. 1 and 2 show a partitioned pipe manufactured by one embodiment of a method for manufacturing a partitioned pipe according to the present invention. The partitioned pipe is provided at a center of a cylindrical pipe section 31 with a partition section 33. Is formed.
[0020]
This pipe with a partition is manufactured as described below.
In this embodiment, as shown in FIG. 10 described later, a plate material 67 made of an aluminum alloy in which a brazing material layer 65 is clad on the outer peripheral surface of the pipe portion 31 is used.
First, the plate 67 is formed by the forming step shown in FIG. 3 to form a pair of half-cylindrical portions 35.
[0021]
The pair of half-cylindrical portions 35 are formed in parallel via an arc-shaped connecting portion 37.
The pair of half-cylindrical cylinders 35 are formed with U-shaped partition moldings 39 protruding inward.
The radius of the pair of half-cylindrical portions 35 is smaller than the radius of the pipe portion 31 to be formed by about 2 mm, and an edge 41 is formed outside the half-cylindrical portion 35.
[0022]
The above-described molding process is performed by sandwiching a flat plate between predetermined molds and press-molding.
For example, when manufacturing a pipe with a partition having a wall thickness of 1.5 mm and an outer diameter of 22 mm, the height h of the partition forming section 39 is 9 mm and the width is 9 mm as shown in FIG. The partition forming portion 39 is formed with an arc portion 43 having a radius of 2 mm and an arc portion 45 having a radius of 3.5 mm.
[0023]
Next, by the cutting process shown in FIG. 4, the connecting portions 37 located between the partition forming portions 39 indicated by oblique lines in FIG. 4A and the edge portions 41 located on both sides of the partition forming portion 39 are left over. It is cut off together with the part 41a.
This cutting step is performed by trimming with a press machine.
For example, when manufacturing a pipe with a partition having an outer diameter of 22 mm, the cutting width a in the axial direction of the connecting portion 37 is 8 mm, and the cutting width b in the vertical direction in the axial direction is 9.5 mm. You.
[0024]
Thereafter, in the compression step shown in FIG. 5, the partition forming section 39 is compressed from both sides to form the half-divided partition section 47.
In this compression step, as shown in FIG. 6, the outside of the half-cylindrical portion 35 is held down by a work holder 51 urged by a spring 49, while both sides of the partition forming portion 39 inside the half-thickness cylindrical portion 35 Then, the compression member 53 is disposed, and the partition member 39 is compression-molded by the compression member 53.
[0025]
In this embodiment, a dimension correcting block 55 is disposed between the compression members 53, and the projecting length H (shown in FIG. 5) of the half-divided partition 47 to the inside is corrected by the dimension correcting block 55. .
In addition, the thickness of the half partition part 47 is regulated by the compression amount of the compression member 53.
Further, for example, when manufacturing a pipe with a partition having an outer diameter of 22 mm, the height H of the half-divided partition 47 is corrected by the dimension correction block 55 to 11 mm.
[0026]
Next, in the edge forming step shown in FIG. 7, the edge portions 41 on both sides of the pair of half-cylindrical portions 35 are formed, and as shown in FIG. It is formed in the following arc shape.
This edge forming step is performed by sandwiching a pair of half-cylindrical portions 35 between predetermined molds and press forming.
[0027]
Thereafter, in the facing step shown in FIG. 8, the connecting portion 37 is protruded from the inside, and the pair of half-cylindrical portions 35 are arranged facing each other.
This facing step is performed by housing the outside of the half-cylindrical cylindrical portion 35 in the mold 57 and pressing the connecting portion 37 against the arc portion 61 of the mold 57 by the punch 59.
In this embodiment, in the cutting step shown in FIG. 4, for example, when manufacturing a pipe with a partition having an outer diameter of 22 mm, the cutting width a in the axial direction of the connecting portion 37 is set to 8 mm, and the axial length is set to 8 mm. Since the cutting width b in the direction perpendicular to the direction is set to 9.5 mm, the gap 63 generated on the connecting portion 37 side can be minimized in a state where the half cylindrical portion 35 is opposed.
[0028]
That is, the cutting width a in the axial direction and the cutting width b in the axial direction of the connecting portion 37 in the cutting step are set such that the gap 63 generated on the connecting portion 37 side is minimized.
Next, the pair of half-cylindrical portions 35 facing each other are joined by the joining process shown in FIG.
[0029]
This aligning step is performed by housing the outside of the half cylinder 35 in a pair of molds (not shown) and moving the mold. At this time, the half cylinder 35 is formed into a pipe shape. .
Thereafter, a joining step is performed, and the pair of half-cylindrical portions 35 and the pair of half-partitioning portions 47 are joined to each other.
[0030]
In this embodiment, the joining step is performed by brazing using a non-corrosive flux, but may be vacuum brazing.
For the purpose of application of the non-corrosive flux, a material in which the brazing material layer 65 is clad on the outer peripheral surface of the pipe is used. Will be possible.
[0031]
Further, in the brazing using the brazing material as described above, brazing can be performed more reliably by laying the joint so as to face down and brazing.
Further, by changing the material, various joining methods become possible.
Further, the step of cutting off the edge 41 may be performed after the step of forming the edge.
The reason for this is that if the bottom surface of the edge portion 41 and the bottom portion of the half partition part 47 shown in FIG. 7B are not flush, when the half cylindrical portion 35 is formed into a pipe shape, If the gap between the edge portion and the other edge portion and the gap between one half-divided portion and the other half-divided portion are not narrow (preferably 0.1 mm or less), the brazing property deteriorates.
[0032]
In the above-described method of manufacturing a pipe with a partition, a half-partition 47 is formed by compressing the U-shaped partition-forming part 39 formed on each of the pair of half-cylindrical parts 35 from both sides, thereby forming a pair of half-parts. Since the half partitioning portions 47 are joined together by joining the cylindrical portions 35 to form the partitioning portions 33, it is possible to easily obtain a partitioning pipe in which the partitioning portions 33 are integrally formed from one plate material.
[0033]
Therefore, it is not necessary to use an expensive pipe material formed in a cylindrical shape in advance, and the material cost can be significantly reduced as compared with the related art.
Hereinafter, a first embodiment of the method for producing a header for a partitioned heat exchanger of the present invention will be described.
FIG. 11 shows a header for a heat exchanger with a partition manufactured according to this embodiment. In the header for a heat exchanger with a partition, a partition 33 is formed at the center of a cylindrical pipe portion 31A.
[0034]
Further, a tube insertion hole 71 is formed on one side of the outer periphery of the pipe portion 31A at a predetermined interval.
Further, both ends of the pipe portion 31 </ b> A are closed by the lid member 73.
In this method of manufacturing a header for a heat exchanger with a partition, a plate 67 made of aluminum having a brazing material layer 65 formed on the outer peripheral surface of the pipe portion 31A is used. The dividing partitions 47 are brazed to each other.
[0035]
Further, in this embodiment, after the edge forming step shown in FIG. 7, as shown in FIG. 12, tube insertion holes 71 are formed at a predetermined interval in one half-cylindrical cylindrical portion 35, and at the same time, A fluid inlet 75 and a fluid outlet 77 through which the heat medium flows in and out are formed.
This step is performed by forming a slit and a pierce by a press machine.
[0036]
In the method for manufacturing a header for a heat exchanger with partitions, the joining step is performed as follows in a heat exchanger in which the refrigerant turns once in the heat exchanger.
That is, the tube insertion hole 71 of the pipe portion 31A into which the lid member 73 is fitted at both ends is fitted into one of the tubes of the core portion of the heat exchanger including the fins and the tube, and the other end of the header having no partition is fitted. With the tube insertion holes fitted, these are fixed with a jig, vacuum brazed, or a non-corrosive flux is applied to the brazed part, for example, in a nitrogen atmosphere, a pair of half-cylindrical cylindrical parts 35, a pair of half-partitioning portions 47, a pipe portion 31A and a lid member 73, a tube and a tube insertion hole 71, and a tube and a fin are brazed.
[0037]
When brazing the temporarily fixed heat exchanger, the brazing is performed with the joining portion of the pipe 31A down, so that the molten brazing material gathers at the joining portion of the pipes due to gravity, and the gap between the joining portions of the narrow pipes is reduced. In addition, since it is drawn into the gap of the half-split part, the brazing property can be further improved.
In the above-described method of manufacturing the header for a partitioned heat exchanger, similarly to the method of manufacturing the partitioned pipe, the U-shaped partition molded portions 39 formed on the pair of half-cylindrical portions 35 are compressed from both sides. A half-divided portion 47 is formed, and the pair of half-divided cylindrical portions 35 are combined to form the half-divided portion 47 to form the partition portion 33. Therefore, a pipe integrally formed with the partition portion 33 from one sheet material. It is possible to easily obtain the part 31A.
[0038]
Therefore, it is not necessary to use an expensive pipe material formed in a cylindrical shape in advance, and the material cost can be significantly reduced as compared with the related art.
Further, as compared with the production using a cylindrical pipe, since the partition is integrally formed, the number of parts can be reduced and the cost can be reduced.
Further, since the tube insertion hole can be processed in a semicircular state, the strength of the mold for forming the tube insertion hole can be sufficiently secured, the processing time can be shortened, and the cost can be reduced.
[0039]
Further, since the pair of half-cylindrical portions 35 and half-partition portions 47 can be securely joined by brazing, it is possible to reliably prevent the heat medium from leaking from the partition portions to the outside.
Hereinafter, a second embodiment of the method for producing a header for a partitioned heat exchanger of the present invention will be described.
[0040]
In this embodiment, as shown in FIG. 10, a plate made of an aluminum alloy in which a brazing material layer 65 is clad on the outer peripheral surface of the pipe portion 31 is used.
In this embodiment, as shown in FIG. 13A, a circular cover member 77 is integrally formed on both sides of the plate member 75 by a cutting step before the forming step, and the half shown in FIG. When the tube insertion hole 71 is formed in the split cylindrical portion 35, the lid member 77 is pressed to form the protruding portion 79.
[0041]
Then, before the joining step shown in (f), the protruding portions 79 of the lid member 77 are inserted into both ends of the pipe portion 31A, and are brazed in the joining step.
In this embodiment, it is possible to simultaneously form the lid member 77 from one plate.
[0042]
In the above-described embodiment, a description has been given of an example in which the pair of half-partitioning portions 47 are formed in the same shape, and the ends thereof are brazed. However, the present invention is not limited to such an embodiment. For example, as shown in FIG. 14, the tip of one half-divided portion 47A may be cut at the center, opened outward, and the other half-divided portion 47 may be abutted during this. .
[0043]
In this manufacturing method, as shown in FIG. 15, in the cutting step shown in FIG. 15A, the tip of one of the partition forming portions 39 is cut at the center to form a slit 39a, and in the pressing step shown in FIG. The tip of the half-partitioning portion 47A on one side is formed into a V-shape or a U-shape by a jig.
In this manufacturing method, the tip of the half-partitioning portion 47A on one side serves as a receiving portion for the brazing material, so that the half-partitioning portions 47, 47A can be brazed more reliably.
[0044]
Further, in the embodiment described above, an example in which the pair of half-cylindrical portions 35 are formed in the same shape and the end surfaces thereof are brazed has been described, but the present invention is not limited to such an embodiment. For example, as shown in FIG. 16, projecting portions 35a and 35b are alternately formed at the ends of the half cylindrical portion 35 on one side and the half cylindrical portion 35 on the other side. 35b may be alternately fitted.
[0045]
By doing so, it is possible to improve the strength of the pipe portion 31A in the axial length direction.
Further, for example, as shown in FIG. 17, a bent portion 35c that is bent inward is formed at an end of a pair of half-cylindrical cylindrical portions 35, and these bent portions 35c are brought into contact with each other. May be.
[0046]
With this configuration, even when the brazing material layer 65 is formed only on the outer periphery of the pipe portion 31A, the brazing material layer 65 and the brazing material layer 65 can be arranged adjacent to each other, and brazing can be performed. It can be performed reliably.
In addition, as shown in FIG. 17C, the tube 81 can be reliably positioned by abutting the distal end of the tube 81 on the bent portion 35c.
[0047]
In the embodiment described above, an example in which one partition portion 33 is formed in the pipe portions 31 and 31A has been described. However, the present invention is not limited to such an embodiment, and a plurality of partition portions may be similarly formed. Of course, it can be formed.
In the method for manufacturing a header for a partitioned heat exchanger described above, the example in which the tube insertion hole 71 is formed after the edge forming step has been described, but the present invention is not limited to such an example. The tube insertion hole may be formed by a cutting step as long as it is a step before the joining step.
[0048]
Hereinafter, a third embodiment of the method for producing a header for a partitioned heat exchanger of the present invention will be described.
FIG. 18 shows a header manufactured by the manufacturing method of this embodiment. The header pipe 81 of the header has a half-cylindrical one-side half-cylindrical member 83 and another half-half cylindrical member 85. Are formed by abutting and brazing the open ends.
[0049]
On both sides of the header pipe 81, lid members 73 are brazed.
A V-shaped one-side partition portion 83b protruding inward is formed in the center of the one-half cylinder portion 83a of the one-half cylinder member 83.
The other half cylinder part 85a of the other half cylinder part 85 has another partition part 85b protruding inward.
[0050]
And the contact part of the one side partition part 83b and the other side partition part 85b is joined by brazing mutually.
A tube insertion hole 71 is formed in the other half cylinder member 85.
Although not shown, holes for mounting an inlet pipe, an outlet pipe, and the like are provided as necessary.
[0051]
The above-described one-half cylinder member 83 is manufactured as described below.
As the raw material for the one-half cylindrical member 83, a plate material 67 made of an aluminum alloy having a brazing material layer 65 formed on the outer peripheral surface of the one-half cylindrical member 83 is used.
Then, first, the plate member 67 is formed by the forming step shown in FIG. 19, and the one-side half-cylindrical portion 83a is formed. (Good) one-side partition 83b is formed.
[0052]
At this time, the bottom surface of the one-side partition 83b and the surface of the edge 83c are the same.
In other words, the radius of the one-half cylinder portion 83a is the same as the radius of the header pipe. For example, in the case of a header pipe having an outer diameter of 22 mm, the radius is 11 mm.
Next, as shown in FIG. 20, the excess portion 83d is deleted.
Since the tube insertion hole is not formed in the one-side half-tubular member 83, it is not necessary to crush the half-partitioning portion 47 shown in FIGS. 5 and 6 in this embodiment. Only the part 83d may be deleted.
[0053]
Thereafter, as shown in FIG. 21, the edge 83c is bent to form a flange 83e.
The removal of the excess portion 83d and the molding of the flange portion 83e may be performed simultaneously.
On the other hand, the other half-tubular member 85 described above is manufactured as described below.
[0054]
As the other half-split cylindrical member 85, a plate material 67 made of an aluminum alloy having a brazing material layer 65 formed on the outer peripheral surface of the other half-split cylindrical portion 85a is used.
The method of manufacturing the other half-cylindrical member 85 is basically the same as the method of forming one half-cylindrical portion 35 of the first embodiment of the method of manufacturing a heat exchanger header with a partition described above. It is.
[0055]
First, as shown in FIG. 22, the other half cylinder part 85a is formed, and at the same time, a U-shaped partition molding part 39 protruding inward is formed in the other half cylinder part 85a.
Next, in the cutting step, the edge portions 85c and the excess portions 85d located on both sides of the partition forming portion 39 indicated by oblique lines in FIG. 23 are cut off.
[0056]
Thereafter, in the same compression molding step as that shown in FIGS. 5 and 6, the partition forming portion 39 is compressed from both sides to form the other-side partition portion 85b.
Next, the edges 85c formed on both sides of the other half-tubular portion 85a are formed in an arc shape following the other half-tubular portion 85a by the edge forming step shown in FIG.
Thereafter, as shown in FIG. 25, the edge 85c is cut off so as to have the same height as the other-side partition 85a.
[0057]
Next, the tube insertion hole 71 is opened.
The tube insertion hole 71 may be formed at any time after the formation of the other half-tubular portion 85a.
The one-side half-split cylindrical member 83 and the other-side half-split cylindrical member 85 thus manufactured are joined in a joining step.
[0058]
This joining step is performed as follows in a heat exchanger in which the refrigerant makes a U-turn once in the heat exchanger.
That is, a header pipe provided with a lid member 73 at both ends by combining a one-side half-tubular member 83 and another half-tubular member 85 at one end of the tube of a core portion in which tubes and fins are alternately stacked. In the state where the tube insertion hole 71 is fitted and the other is inserted and fitted into the tube insertion hole of the header pipe having no partition, these are fixed with a jig or the like, and brazing using a non-corrosive flux, or vacuum By performing the brazing, the brazing material outside the header pipe is melted, and the opening ends of the one-side half-cylindrical member 83 and the other-side half-cylindrical member 85, and the one-side partition portion 83b and the other side are separated. The brazing material is drawn to the contact portion with the partition portion 85b and brazed.
[0059]
In the method for manufacturing a header for a partitioned heat exchanger of this embodiment, it is not necessary to use an expensive pipe formed in a cylindrical shape in advance, and the material cost can be significantly reduced as compared with the related art.
Further, as compared with the production using a cylindrical pipe, the partition is integrally formed, so that the number of parts can be reduced and the cost can be reduced.
[0060]
Further, the brazing of the partition portion can prevent leakage of the refrigerant to the outside due to brazing failure of the partition portion because of the brazing inside the header, and can improve the brazing property.
Further, since the tube insertion hole 71 can be formed in a semicircular shape, the strength of the mold can be sufficiently obtained, and the processing time can be shortened to reduce the cost.
As another embodiment of the one-side half-tubular member 83, the other half-tubular member 85 may be formed in the same manner as in the step of not providing the tube insertion hole 71.
[0061]
Also, the joining shape of the one-half cylinder member 83 and the other-half cylinder member 85 can be various shapes without being limited to the shape of the embodiment.
Further, the partition portion may be formed at a plurality of places described in the example of one place.
Also, the cross-sectional shape of the header pipe has been described as an example of a circular shape, but the cross-sectional shape is not limited to a circular shape, and may be an elliptical shape, a square shape, or the like.
[0062]
Further, in all the above-described embodiments, the plate material is described using an aluminum alloy in which a brazing material is clad on the outer peripheral surface, but the cladding of the brazing material is not limited to this, and may be an inner peripheral surface, It may be clad on both sides.
Also, instead of cladding, a brazing material may be placed on the brazing portion and brazed.
[0063]
Further, the plate is not limited to aluminum.
Further, in all the embodiments, an example in which one partition is formed has been described. However, the present invention is not limited to the embodiment of the present invention, and it is needless to say that a plurality of partitions can be formed in a similar manner.
Further, in all the embodiments, the description has been made with the header having a circular cross section. However, the cross sectional shape of the header is not limited to the circular cross section, but may be an elliptical shape, a square, or the like.
[0064]
【The invention's effect】
As described above, in the method for manufacturing a pipe with a partition according to the first aspect, the half-partitioned part is formed by compressing the U-shaped partition-formed part formed on each of the pair of half-part cylindrical parts from both sides. Since the half partition portions are joined to form a partition portion by joining the pair of half cylindrical portions, a pipe integrally formed with the partition portion can be easily obtained from one sheet material.
[0065]
According to the method for manufacturing a header for a heat exchanger with a partition according to the second aspect, a header integrally formed with a partition can be easily obtained from one sheet material.
In the method for manufacturing a pipe with a partition or the header for a heat exchanger with a partition according to claim 3, the pair of half-split cylindrical portions and the half-split portions are securely joined by brazing, so that the heat medium flows from the partition to the outside. Can reliably be prevented from leaking.
[0066]
In the method for manufacturing a header for a heat exchanger with a partition according to claim 4, the one-side half-tubular member on which the one-side partition portion obtained by forming the plate is formed, and the other side obtained by forming the plate. Abutting the other half-tubular member on which the partition is formed, the open end of the one-half cylinder and the other half-cylindrical member and the one-side partition and the other partition. Since the partition portion is formed by joining the contact portions to each other, a header in which the partition portion is integrally formed can be easily obtained from the plate material.
[0067]
In the method for manufacturing a header for a heat exchanger with a partition according to claim 5, the other-side partition portion is formed by compressing the partition-formed portion formed in the other-side half-tubular portion from both sides. Can be reduced in thickness.
[0068]
In the method for manufacturing a header for a heat exchanger with a partition according to claim 6, the one-side partition is formed by compressing the partition formed portion formed in the one-side half-tubular portion from both sides. Can be reduced in thickness.
In the method of manufacturing a header for a heat exchanger with a partition according to claim 7, the opening end of the one-side half-tubular member and the other-side half-tubular member, and the contact portion between the one-side partition and the other-side partition. Are brazed to each other and securely joined, so that there is an advantage that it is possible to reliably prevent the heat medium from leaking from the partition portion to the outside.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a partitioned pipe manufactured by a first embodiment of a method for manufacturing a partitioned pipe of the present invention.
FIG. 2 is a sectional view taken along the line II-II in FIG.
FIG. 3 is an explanatory view showing a forming step of the first embodiment of the method of manufacturing a pipe with a partition according to the present invention.
FIG. 4 is an explanatory view showing a cutting step of the first embodiment of the method of manufacturing a pipe with a partition according to the present invention.
FIG. 5 is an explanatory view showing a compression step of the first embodiment of the method of manufacturing a pipe with a partition according to the present invention.
FIG. 6 is an explanatory diagram showing details of a compression step in FIG. 5;
FIG. 7 is an explanatory view showing an edge forming step of the first embodiment of the method of manufacturing a pipe with a partition according to the present invention.
FIG. 8 is an explanatory view showing a facing step of the first embodiment of the method of manufacturing a pipe with a partition according to the present invention.
FIG. 9 is an explanatory view showing a joining step of the first embodiment of the method for producing a pipe with a partition according to the present invention.
FIG. 10 is an explanatory view showing a plate member according to a second embodiment of the method of manufacturing a pipe with a partition according to the present invention.
FIG. 11 is an explanatory view showing a header for a heat exchanger with partitions manufactured by the first embodiment of the method for manufacturing a header for a heat exchanger with partitions of the present invention.
FIG. 12 is an explanatory view showing a tube insertion hole forming step of the first embodiment of the method for producing a header for a partitioned heat exchanger of the present invention.
FIG. 13 is a process chart showing a second embodiment of the method for producing the header for a partitioned heat exchanger of the present invention.
FIG. 14 is a sectional view showing another embodiment of the partition part of the method of the present invention.
FIG. 15 is an explanatory view showing a method of manufacturing the partition shown in FIG.
FIG. 16 is an explanatory view showing another embodiment of a method for joining a pair of half-cylindrical cylindrical portions according to the method of the present invention.
FIG. 17 is an explanatory view showing still another embodiment of the method for joining a pair of half-cylindrical cylindrical portions according to the method of the present invention.
FIG. 18 is an explanatory view showing a header for a heat exchanger with partitions manufactured by a third embodiment of the method for manufacturing a header for a heat exchanger with partitions of the present invention.
FIG. 19 is an explanatory view showing a step of forming a one-sided half-tubular member according to the third embodiment of the method for manufacturing a header for a partitioned heat exchanger of the present invention.
FIG. 20 is an explanatory view showing a cutting step of the one-sided half-tubular member of the third embodiment of the method of manufacturing the header for a partitioned heat exchanger of the present invention.
FIG. 21 is an explanatory diagram showing a step of forming a flange of a one-side half-tubular member according to the third embodiment of the method of manufacturing the header for a partitioned heat exchanger of the present invention.
FIG. 22 is an explanatory view showing a forming step of the other half-tubular member in the third embodiment of the method of manufacturing the header for a partitioned heat exchanger of the present invention.
FIG. 23 is an explanatory view showing a step of cutting off the other half-tubular member in the third embodiment of the method of manufacturing the header for a partitioned heat exchanger according to the present invention.
FIG. 24 is an explanatory view showing a step of forming an edge portion of the other half-tubular member in the third embodiment of the method of manufacturing the header for a partitioned heat exchanger according to the present invention.
FIG. 25 is an explanatory view showing a step of cutting off the edge of the other half-tubular member in the third embodiment of the method of manufacturing the header for a partitioned heat exchanger according to the present invention.
FIG. 26 is an explanatory view showing a conventional method for manufacturing a pipe with a partition.
[Explanation of symbols]
31, 31A pipe section
33 Partition
35 half cylinder
37 Connection
39 Partition molding part
41 Edge
47 Half-split partition
65 brazing material layer
83 One-side half cylindrical member
83a One-side half cylindrical part
83b One side partition
85 Other half-tubular member
85a The other half cylinder part
85b other side partition

Claims (7)

A flat plate is formed, and a pair of half-cylindrical portions (35) are formed in parallel via a connecting portion (37), and a U-shaped partitioning protruding inside the pair of half-cylindrical portions (35). A forming step of forming a portion (39);
A cutting step of cutting at least the connecting portion (37) located between the partition forming portions (39);
A compression step of compressing the partition forming part (39) from both sides to form a half-divided part (47);
A facing step of projecting the connecting portion (37) from the inside and facing the pair of half-cylindrical portions (35);
A joining step of joining the pair of half-cylindrical portions (35) in the facing state;
A joining step of joining the pair of half-cylindrical portions (35) to each other;
A method for producing a pipe with a partition, comprising: A flat plate is formed, and a pair of half-cylindrical portions (35) are formed in parallel via a connecting portion (37), and a U-shaped partitioning protruding inside the pair of half-cylindrical portions (35). A forming step of forming a portion (39);
A cutting step of cutting at least the connecting portion (37) located between the partition forming portions (39);
A compression step of compressing the partition forming part (39) from both sides to form a half-divided part (47);
Forming a tube insertion hole (71) in the one half cylindrical portion (35);
A facing step of projecting the connecting portion (37) from the inside and facing the pair of half-cylindrical portions (35);
A joining step of joining the pair of half-cylindrical portions (35) in the facing state;
A joining step of joining the pair of half-tubular portions (35) and the half-split partitions (47) to each other;
A method for producing a header for a heat exchanger with a partition, comprising: The method for producing a pipe with a partition according to claim 1 or the method for producing a header for a heat exchanger with a partition according to claim 2,
The flat plate is made of aluminum on which a brazing material layer (65) is formed, and in the joining step, the pair of half-split tubular portions (35) and the half-split partition portions (47) are brazed to each other. A method for producing a pipe with partitions or a method for producing a header for a heat exchanger with partitions. The flat plate is formed into a half-split cylinder to form a one-side half-split tubular part (83a), and the one-side half-split tubular part (83a) is formed with a one-side partition part (83b) projecting inward. One-side member manufacturing process to obtain a one-side half-split cylindrical member (83);
The flat plate is formed into a half-tubular shape to form another half-tubular portion (85a), and the other half-tubular portion (85a) has another partitioning portion (85b) projecting inward. The other side member manufacturing process to obtain the other side half cylindrical member (85) by
Forming a tube insertion hole (71) in the other half-tubular member (85);
The one-half cylinder member (83) and the other-half cylinder member (85) are put together, and the one-half cylinder member (83) and the other-half cylinder member (85) are joined together. A joining step of joining an opening end portion of the first and the contact portions of the one-side partition portion (83a) and the other-side partition portion (85a) to each other;
A method for producing a header for a heat exchanger with a partition, comprising: The method for producing a header for a heat exchanger with a partition according to claim 4,
The other side member manufacturing process,
A flat plate is formed into a half-segmented cylindrical shape to form the other half-segmented cylindrical portion (85a), and a U-shaped partition molding portion (39) protruding inward from the other half-segmented cylindrical portion (85a). A molding step of forming
A cutting step of cutting edges (85c) located on both sides of the partition forming section (39);
A compression step of compressing the partition forming section (39) from both sides to form the other-side partition section (85b);
A method for producing a header for a heat exchanger with a partition, comprising: The method for producing a partitioned heat exchanger header according to claim 4 or 5,
The one-side member manufacturing process,
Forming a flat plate into a half-split cylindrical shape to form a one-side half-split tubular part and forming a U-shaped partition forming part projecting inward to the one-side half-split tubular part,
A cutting step of cutting edges located on both sides of the partition forming section,
A compression step of compressing the partition forming portion from both sides to form the one-side partition portion. The method for producing a header for a heat exchanger with partitions according to claim 4 or claim 6,
The flat plate is made of aluminum on which a brazing material layer (65) is formed, and in the joining step, an open end of the one-side half-tubular member (83) and the other-side half-tubular member (85). And a contact part between the one-side partition part (83b) and the other-side partition part (85b) is brazed to each other.

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