CN112676409A - Torsion tool, bending tool and manufacturing method of heat exchanger - Google Patents
Torsion tool, bending tool and manufacturing method of heat exchanger Download PDFInfo
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- CN112676409A CN112676409A CN201910995186.1A CN201910995186A CN112676409A CN 112676409 A CN112676409 A CN 112676409A CN 201910995186 A CN201910995186 A CN 201910995186A CN 112676409 A CN112676409 A CN 112676409A
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- 238000005452 bending Methods 0.000 title claims abstract description 144
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 claims description 23
- 230000013011 mating Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000002356 single layer Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The application relates to the technical field of heat exchange, in particular to a torsion tool, a bending tool and a manufacturing method of a heat exchanger. The manufacturing method comprises the following steps: the third section of one heat exchange tube is twisted by a preset twisting angle theta relative to the first section and the second section by the twisting tool; providing a bending tool, and bending the third section by a preset bending angle alpha by the bending tool so as to change the relative position of the first section and the second section; or the bending tool bends the first section and the second section so that the relative positions of the first section and the second section are changed, and the third section is bent by a preset bending angle alpha; and providing a current collector, and assembling the heat exchange tube and the current collector together. The application provides a twist reverse frock, bending frock and heat exchanger's manufacturing method, can satisfy the bending of the core structure of different thickness.
Description
Technical Field
The application relates to the technical field of heat exchange, in particular to a torsion tool, a bending tool and a manufacturing method of a heat exchanger.
Background
In recent years, automobile air conditioners are developed rapidly, and heat exchangers serving as one of main components of the automobile air conditioners are continuously improved and optimized along with the development of scientific technology. The parallel flow bending heat exchanger has the characteristics of high efficiency, small volume, light weight and the like, and is gradually applied to an automobile air conditioning system.
In the forming process of the parallel flow bending heat exchanger applied to the automobile air conditioning system, all parts of the heat exchanger are required to be assembled into a single-layer core structure, and then the heat exchanger is bent by a bending machine to form a double-layer structure. However, when the heat exchanger formed in the mode is used for bending the single-layer core structure by the bending machine, the requirement on the thickness of the single-layer core is met, and the bending machine is difficult to bend the single-layer core structure beyond the expected thickness.
Disclosure of Invention
In view of this, the embodiment of the application provides a twisting tool, a bending tool and a manufacturing method of a heat exchanger, which can meet bending requirements of core structures with different thicknesses.
The invention provides a manufacturing method of a heat exchanger, which comprises the following steps: providing a heat exchange tube which is a flat tube and comprises a first section, a second section and a third section, wherein the first section and the second section are connected to two ends of the third section;
providing a torsion tool, wherein the torsion tool twists the third section of one heat exchange tube relative to the first section and the second section by a preset torsion angle theta;
providing a bending tool, wherein the bending tool bends the third section by a preset bending angle alpha so as to change the relative position of the first section and the second section; or the bending tool bends the first section and the second section so that the relative positions of the first section and the second section are changed, and the third section bends the preset bending angle alpha;
and providing a current collector, and assembling the heat exchange tube and the current collector together.
According to the manufacturing method of the heat exchanger, a single heat exchange tube is twisted and bent, and then the plurality of twisted and bent heat exchange tubes and the flow collecting piece are assembled into the heat exchanger. The manufacturing method can meet the bending requirements of core structures with different thicknesses.
In one possible design, the surface of the heat exchange tube has a tube plane, the tube plane includes a first tube plane of the first section, a second tube plane of the second section, and a third tube plane of the third section, the first tube plane and the second tube plane are in the same plane to form a first plane, and the third tube plane is in the first plane before the heat exchange tube is twisted by the preset twisting angle θ;
and after the third section is twisted by the preset twisting angle theta, the plane of the third pipe deviates from the first plane.
In one possible design, before the third section is bent by a preset bending angle α or the first section and the second section are bent, the first tube plane and the second tube plane are both located on the first plane, and an extension line of a central axis of the first section coincides with an extension line of a central axis of the second section;
when the third section is bent by the preset bending angle alpha or the first section and the second section are bent, the first pipe plane and the second pipe plane respectively rotate around a first axis in the first plane, and the rotation directions of the first pipe plane and the second pipe plane are opposite, so that the cross section of the third section is approximately U-shaped;
the first tube plane and the second tube plane are in the first plane before, after and during rotation;
wherein the first axis is perpendicular to the first plane.
In one possible design, after the third section is bent by the preset bending angle α or the first section and the second section are bent, the first tube plane and the second tube plane are parallel to each other in the first plane, and the extension line of the central axis of the first section is parallel to the extension line of the central axis of the second section.
In one possible design, the heat exchange tube is twisted by the twisting tool,
the twist reverse frock includes:
a first portion and a third portion;
the torsion method of the torsion tool comprises the following steps:
the heat exchange tube is arranged on the first part, and two ends of the heat exchange tube are connected with the first part;
the third part is connected with the third section and drives the third section to rotate so as to enable the plane of the third pipe to deviate from the first plane at least partially, and at least part of the heat exchange pipe is abutted against the third part in the process of driving the third part to drive the third section to twist by the preset twisting angle theta.
In one possible design, the third section is bent by the bending tool,
the frock of bending includes:
a fourth section, a fifth section, and a sixth section;
the bending method of the bending tool comprises the following steps:
mounting the third section to the fourth section, the fourth section having a central axis, the central axis coinciding with the first axis;
connecting one end of the first segment adjacent to the third segment to the fifth portion and one end of the second segment adjacent to the third segment to the sixth portion;
and rotating the fifth part and the sixth part around the first axis so that the first pipe plane and the second pipe plane respectively rotate around the first axis in the first plane, and the third section is bent to be attached to the surface of the fourth part.
The invention also provides a torsion tool, which is used for torsion of a heat exchange tube, the surface of the heat exchange tube is provided with a tube plane, the plane of the tube plane is a first plane before the heat exchange tube is twisted, and the torsion tool comprises:
the first part comprises oppositely arranged first grooves, and the first grooves are used for mounting two ends of the heat exchange tube;
in the third part, the first part is provided with a first groove,
the third part is used for being connected with the part of the heat exchange tube between the two first grooves and driving the heat exchange tube between the two first grooves to be twisted, so that the heat exchange tube between the two first grooves is obliquely arranged relative to the tube plane.
The torsion tool provided by the application realizes torsion of a single heat exchange tube by adopting the torsion tool, so that the corresponding position of the single heat exchange tube required by the manufacturing method reaches the preset torsion angle theta, and the torsion tool is simple in structure and convenient for torsion of the single heat exchange tube.
In one possible design, a second portion is attached to the first portion, the second portion including a mating block;
the matching block is provided with a first surface used for abutting against the heat exchange tube, and the first surface is formed by inclining a plane parallel to the first plane to the rotation direction of the third part;
the inclination angle of the first surface is the same as the preset torsion angle theta.
The invention also provides a bending tool, the bending tool is used for bending the twisted heat exchange tube, the surface of the heat exchange tube is provided with a tube plane, the heat exchange tube comprises a first section, a second section and a third section, the third section is connected to two ends of the first section and the second section, the tube plane comprises a first tube plane of the first section, a second tube plane of the second section and a third tube plane of the third section, the first tube plane and the second tube plane are positioned on the same plane to form a first plane, the third section is twisted relative to the first section and the second section, and the third tube plane deviates from the first plane; the frock of bending includes:
a fourth section for mounting the third section, the fourth section having a central axis, the central axis being perpendicular to the first plane;
the fifth part and the sixth part are respectively used for being connected with the first section and the second section, the fifth part and the sixth part can rotate around the central shaft, and when the bending tool bends the heat exchange tube, a plane formed by rotation tracks of the fifth part and the sixth part is parallel to the first plane.
The application provides a bending frock adopts this kind of bending frock to realize bending of single heat exchange tube to reach the required single heat exchange tube of manufacturing approach and bend again on presetting torsion angle theta basis, reduce the deformation of torsion part, and this bending frock simple structure, the bending of the heat exchange tube after the single torsion of being convenient for.
In a possible design, the fifth part is provided with a third groove for the mounting of the second section;
the sixth part is provided with a fourth groove used for mounting the first section;
the fourth part comprises a third surface and a fourth surface, and when the bending tool bends the heat exchange tube, at least part of the third section abuts against between the third surface and the fourth surface;
the third surface and the fourth surface are inclined relative to the first plane, and the inclination angle is the same as the preset torsion angle theta of the third section.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
FIG. 1 is a flow chart of a method for manufacturing a heat exchanger provided by an embodiment of the present application;
fig. 2 is a schematic structural view of a twisting fixture according to an embodiment of the present disclosure in a first direction;
fig. 3 is a schematic structural diagram of a third portion according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of another third portion provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a twisting fixture according to an embodiment of the present application in a second direction, where a direction indicated by an arrow is a length direction of a first portion;
fig. 6 is a schematic structural view of another torsion fixture provided in the embodiment of the present application;
fig. 7 is a schematic structural view of a bending tool in a first direction according to an embodiment of the present application;
fig. 8 is a structural schematic diagram of a bending tool in a second direction according to an embodiment of the present application;
fig. 9 is a schematic structural view of a bending tool in a third direction according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of an initial state in which a bending tool and a heat exchange tube are matched according to an embodiment of the present application;
fig. 11 is a structural schematic diagram of a bending state of a bending tool and a heat exchange tube in cooperation according to an embodiment of the present application;
fig. 12 is a schematic structural view of a portion of the heat exchange tubes arranged in the heat exchanger provided in the embodiment of the present application, wherein the direction indicated by an arrow is the thickness direction of the flat tube.
Reference numerals:
1-a first part;
11-a fixed seat;
12-a first groove;
2-a second part;
21-a mating block;
22-a first surface;
3-a third part;
31-a first handle;
32-connecting blocks;
33-a second groove;
34-a second surface;
35-a fifth groove;
36-a first reference line;
4-a linking structure;
5, heat exchange tubes;
51-first section;
52-third section;
53-second stage;
54-tube plane;
55-a first plane;
56-second plane;
6-a limiting part;
7-the fourth part;
71-a first mounting block;
711-a fixed part;
711 a-grip structure;
712-a stationary shaft;
712 a-a third surface;
72-a second mounting block;
721-fourth surface;
722-a second reference line;
723-sixth groove;
73-a fastening device;
8-the fifth part;
81-a first connection;
82-a third mounting block;
821-a second handle;
822-a third groove;
9-sixth section;
91-a second connection;
92-a fourth mounting block;
921-third handle;
922-a fourth groove;
10-a positioning section.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Detailed Description
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
An embodiment of the present application provides a method for manufacturing a heat exchanger, optionally, the heat exchanger may be used in an automotive air conditioning system, the heat exchanger is shown in fig. 12, and it can be known from structural matching of the heat exchanger that the heat exchanger includes a heat exchange tube 5 and a current collecting member, in order to arrange more heat exchange tubes 5 in a limited space of the heat exchanger, so as to improve heat exchange efficiency, optionally, the heat exchange tubes 5 are flat tubes, a plurality of flat tubes are sequentially arranged along a thickness direction (as indicated by arrows in fig. 12) of the heat exchanger, and both ends of the flat tubes are respectively communicated with the current collecting member, and the heat exchange tubes 5 are bent to finally form a double-layer structure as shown in fig..
In order to process and form the heat exchanger shown in fig. 11, as shown in fig. 1, which is a flowchart of a manufacturing method of the heat exchanger, since all heat exchange tubes 5 commonly used in the heat exchanger are flat tubes, the manufacturing method takes the heat exchange tubes 5 as the flat tubes for specific description, and the heat exchange tubes 5 mentioned later all default to the flat tubes without specific description, wherein the heat exchange tubes 5 include a first section 51, a second section 53 and a third section 52, and the first section 51 and the second section 53 are connected to both ends of the third section 52, the manufacturing method of the heat exchanger includes the following steps:
s1: providing a twisting tool, and twisting the third section 52 of one heat exchange tube 5 relative to the first section 51 and the second section 53 by a preset twisting angle theta;
s2: providing a bending tool, and bending the third section 52 by a preset bending angle alpha by the bending tool so as to change the relative position of the first section 51 and the second section 53; or the bending tool bends the first section 51 and the second section 53, so that the relative positions of the first section 51 and the second section 53 are changed, and the third section 52 is bent by a preset bending angle alpha;
s3: a header is provided, and the heat exchange tube 5 and the header are assembled together.
Through the steps, the single heat exchange tube 5 is respectively twisted and bent, so that the single heat exchange tube 5 is roughly in a U-shaped structure, then the plurality of bent heat exchange tubes 5 are aligned in the thickness direction, and the collecting pieces are respectively assembled at two ends of the heat exchange tube 5, so as to form a double-layer structure with the collecting pipes communicated with the heat exchange tubes 5. Because the whole space size of heat exchanger is certain, according to required heat transfer effect, can do the adaptability adjustment to the number of flat pipe and flat pipe thickness, width. The form that the heat exchanger is assembled by firstly twisting and bending the single heat exchange tube 5 and then assembling the plurality of heat exchange tubes 5, the current collecting piece, the fins and other parts is adopted, and compared with the form that the single-layer core structure consisting of the heat exchange tube 5, the current collecting tube and other parts is bent into a double-layer structure by adopting a bending machine in the related technology: the bending machine used in the related art can only bend a single-layer core structure within a certain strength range, has certain requirements on the thickness of the flat pipe, and can cause bending difficulty or bending failure when the thickness of the flat pipe is large, and the joint between the bending area and the non-bending area of the flat pipe can cause distortion when the flat pipe is bent, so that the deformation is large. The method can meet the bending requirements of the heat exchange tubes 5 with different thicknesses and widths, and in the process of twisting and bending of a single heat exchange tube 5, the non-bending area connected with the bending part is less influenced by bending force and less deformed, and belongs to the allowable deformation range. Therefore, through the form of firstly twisting, bending and then assembling and matching, the applicability to different thicknesses of the flat pipe is wider, the bending effect is better, and the deformation area is reduced.
Optionally, after step S3, a plurality of fins are disposed between the first segment 51 and the first segment 51, and between the second segment 53 and the second segment 53 of the adjacent flat tubes, and the collecting members are respectively disposed at the ends of the first segment 51 and the second segment 53, so that the collecting members are connected to the flat tubes, and after the assembly is completed, the heat exchanger is formed by integral brazing.
In order to achieve the twisting and bending of a single heat exchange tube 5 so as to be able to be used as a heat exchange tube 5 in a heat exchanger, the twisting and bending in the above steps S1, S2 are further described, wherein the surface of the heat exchange tube 5 has a tube plane 54 (in a flat tube, the tube plane 54 is two flat tube surfaces parallel to each other in the thickness direction of the flat tube, and in this application, the tube plane 54 is defined as one of the flat tube surfaces as a specific tube plane 54), the tube plane 54 selected in this application is as shown in fig. 6, on the basis of which, after dividing the flat tube into a first section 51, a second section 53 and a third section 52, the tube plane 54 includes a first tube plane of the first section 51, a second tube plane of the second section 53 and a third tube plane of the third section 52, the first tube plane and the second tube plane are in the same plane, forming a first plane 55, and before the heat exchange tube 5 is twisted by a preset twisting angle θ, the third tube plane lies in the first plane 55.
When the flat pipe is twisted by the step S1, the third section 52 is twisted by the preset twist angle θ, and then the third pipe plane deviates from the first plane 55. Specifically, before the third section 52 is twisted by a preset angle θ, the center of the flat tube in the length direction is selected to mark a center line along the width direction of the flat tube, the third section 52 is twisted by taking the center line as an alignment, and when the third section is twisted, the third tube plane located in the third section 52 at least partially deviates from the first plane 55 when viewed along the length direction of the flat tube. Optionally, after the preset torsion angle θ is twisted, the third tube planes located in the third section 52 are distributed on one side or two sides of the first plane 55, and the torsion deformations at the two ends of the center line are symmetrical.
Wherein, the height of the heat exchanger of equipment can be reduced to the torsional design of single flat pipe to satisfy the installation demand of heat exchanger. In order to adapt to different installation heights, the preset torsion angle θ is adjustable, and the selectable range is between 5 degrees and 90 degrees, which is not limited in detail here.
A second plane 56 exists along the length direction of the heat exchange tube (as shown in fig. 5, the second plane 56 is a plane perpendicular to the width direction of the flat tube) and the second plane 56 is parallel to the thickness direction of the heat exchange tube 5.
After the flat pipe is twisted, the twisted flat pipe is bent in step S2, and since only the third section 52 is twisted during twisting, both the first pipe plane and the second pipe plane are located on the first plane 55. When bending is performed again on the basis of torsion, the bending can be performed by bending the third section 52 by a preset bending angle α, or by rotating the first section 51 and the second section 53 to be perpendicular to the second plane 56 along the length direction of the heat exchange tube 5 to realize bending, and no matter which bending method is adopted, the first tube plane and the second tube plane are both located on the first plane 55 before bending, and the extension line of the central axis of the first section 51 coincides with the extension line of the central axis of the second section 53.
In the present application, it is preferable to rotate the first and second sections 51 and 53 to be perpendicular to the second plane 56 along the length direction of the heat exchange tube 5 to realize bending. During bending, in the first plane 55, the first tube plane and the second tube plane respectively rotate around the first axis, and the rotation directions of the first tube plane and the second tube plane are opposite, so that the cross section of the third section 52 is approximately U-shaped; the first tube plane and the second tube plane are within the first plane 55 before, after, and during rotation; wherein the first axis is perpendicular to the first plane 55. Alternatively, the first section 51 is rotated counterclockwise and downwardly, and the second section 53 is rotated clockwise and downwardly, so that the first section 51 and the second section are opposite and perpendicular to the second plane 56 in the length direction of the heat exchange tube 5.
Specifically, the flat tube shown in fig. 2 is a twisted flat tube, and the tube plane 54 is shown in fig. 5, wherein the first axis is defined as a line perpendicular to the first plane 55, and the first axis is located on one side of the flat tube. When bending is carried out, the central position of the third section 52 is fixed, the first section 51 and the second section 53 are controlled to rotate around the first axis at the same time, in the rotating process, the first section 51 and the second section 53 are kept to be free of deformation, the pipe plane 54 of the second section 53 of the first section 51 is always located on the first plane 55, the third section 52 takes the central position as a base point, two sides of the third section are bent and deformed relatively, when viewed along the thickness direction of the first section 51 of the flat pipe, the third section 52 is in a U-shaped structure approximately in the first plane 55, the first pipe plane of the first section 51 is parallel to the second pipe plane of the second section 53, and the extension line of the central axis of the first section 51 is parallel to the extension line of the central axis of the second section 53, so that the twisted flat pipe can be bent.
It should be understood that, after bending the preset bending angle α, in order to ensure that the first section 51 and the second section 53 of the flat tube are parallel to each other as shown in fig. 6, considering that the material of the selected flat tube is generally an aluminum product, the elastic deformation of the flat tube during bending is negligible, and optionally, the preset bending angle α may be 90 degrees.
In a specific embodiment, as shown in fig. 2, 3 and 5, in order to twist the flat tubes in the step S1, a twisting tool adapted to twist the heat exchange tubes 5 is designed, and the twisting tool includes: a first part 1 and a third part 3.
Specifically, when the twisting tool is used to twist the flat tube by the preset twisting angle θ, the step S1 in the manufacturing method of the heat exchanger includes:
a. installing a heat exchange tube 5 on the first part 1, wherein both ends of the heat exchange tube 5 are connected with the first part 1;
b. the third part 3 is connected with the third section 52, and the driving part drives the third section 52 to rotate, so that the third tube plane at least partially deviates from the first plane 55, and at least part of the heat exchange tube 5 is abutted against the third part 3 in the process of driving the third section 3 to drive the third section 52 to twist by a preset twisting angle theta.
c. The third segment 52 is twisted by a preset twist angle θ with respect to the first segment 51 and the second segment 53.
More specifically, in a, the first portion 1 serves as a mounting portion of the heat exchange tube 5, and both ends of the heat exchange tube 5 are connected to the first portion 1, respectively, for positioning the heat exchange tube 5 to restrict the movement of the heat exchange tube 5. In order to improve the central symmetry of the third section 52 during twisting, the first part 1 is connected to the position where the first section 51 is connected with the third section 52 and the position where the second section 53 is connected with the third section 52, so that the parts of the first section 51, the second section 53 and the third section 52 which are respectively connected cannot twist along with the third section 52. After the installation is completed, the third part 3 is connected with part of the third section 52 through the step b, and during the connection, it is required to ensure that the center of the third part 3 coincides with the center of the third section 52, so as to ensure that the third section 52 is symmetrical in both sides of the center during the twisting.
In the process of driving the third portion 3 to drive the third segment 52 to twist by the preset twisting angle θ, in order to realize the twisting of the third segment 52, the third portion 3 has the second surface 34, and after at least a part of one side surface parallel to the third tube plane of the third segment 52 is abutted against the second surface 34, the third portion 3 continues to rotate deviating from the first plane 55 to drive the third tube plane to deviate from the first plane 55, so as to realize the twisting.
In c, after the preset torsion angle θ is twisted, in order to ensure the consistency of each flat pipe twisted by the twisting tool, the twisting tool further comprises a second part 2 connected to the first part 1, and the second part 2 comprises a matching block 21. The fitting block 21 has a first surface 22 for abutting against the heat exchange tube 5, the first surface 22 is formed by inclining a plane parallel to the first plane 55 toward the rotation direction of the third portion 3, and the inclination angle of the first surface 22 is the same as the preset torsion angle θ. When the third portion 3 rotates from a direction parallel to the first plane 55 to contact the first surface 22, the third section 52 is twisted by the preset twisting angle θ, so that the heat exchange tube 5 is twisted by the twisting tool.
In other embodiments, other ways are used to ensure the consistency of each flat tube twisted by the twisting operation, for example, a component is separately provided, the component has a certain height, and when the third portion 3 is rotated from a direction parallel to the first plane 55 to contact with the component, the third section 52 is twisted by the preset twisting angle θ, which is not limited in this application.
In a specific embodiment, as shown in fig. 10 and 11, in order to bend the twisted flat tube in step S2, a bending tool adapted to the twisted heat exchange tube 5 is designed, and the third section 52 is bent by the bending tool, the bending tool includes: a fourth part 7, a fifth part 8 and a sixth part 9, the fourth part 7 being intended for mounting the third section 52, the fifth part 8 and the sixth part 9 being intended for connection with the first section 51 and the second section 53, respectively, and the fifth part 8 and the sixth part 9 being movable relative to the fourth part 7, respectively.
Specifically, when the bending tool is used to bend the twisted flat tube by a preset bending angle α, step S2 in the manufacturing method includes:
e. mounting the third section 52 to the fourth section 7, the fourth section 7 having a central axis, the central axis coinciding with the first axis;
f. connecting the end of the first segment 51 close to the third segment 52 to the fifth portion 8 and the end of the second segment 53 close to the third segment 52 to the sixth portion 9;
g. the fifth part 8 and the sixth part 9 are rotated around the first axis so that the first tube plane and the second tube plane are rotated around the first axis in the first plane 55, respectively, the third section 52 is bent to be attached to the surface of the fourth part 7, and the first section 51 and the second section 53 are parallel to each other and are oppositely arranged.
More specifically, in e and f, the fourth section 7 serves as a mounting part of the twisted heat exchange tube 5 for fixing the center of the third section 52, while the first section 51 and the second section 53 are connected by the fifth section 8 and the sixth section 9, respectively, thereby completing the mounting of the twisted heat exchange tube 5. After the heat exchange tube 5 is mounted on the bending tool, as shown in fig. 10, the fifth portion 8 and the sixth portion 9 are connected to the first section 51 and the second section 53, respectively, at positions where they are connected to the third section 52. After the installation is completed, through the step g, when the fifth part 8 and the sixth part 9 are driven to rotate around the central axis of the fourth part 7 at the same time, since the first section 51 and the second section 53 are connected with the fifth part 8 and the sixth part 9 respectively, the first section 51 and the second section 53 are driven to rotate around the central axis at the same time, and the third section 52 is bent.
It should be understood that, when the fifth portion 8 and the sixth portion 9 respectively drive the first section 51 and the second section 53 to rotate, the matching positions of the fifth portion 8 and the first section 51, and the sixth portion 9 and the second section 53 are not changed, and the first tube plane of the first section 51 and the second tube plane of the second section 53 are always located in the first plane 55. In the process of bending the preset bending angle α, more surfaces of the third section 52 close to one side of the fourth section 7 contact with the surface of the fourth section 7 and are attached to the surface of the fourth section 7, so that the third section 52 can be bent on the basis of maintaining the shape of the twisted part of the third section, after the preset bending angle α is bent, the projections of the flat tubes on the first plane 55 are of a symmetrical U-shaped structure, and the first tube planes of the first section 51 and the second tube planes of the second section 53 which form two ends of the U-shaped structure are both located on the first plane 55, so that the twisted heat exchange tube 5 can be bent through the bending tool.
In other embodiments, the present application may also provide a bending tool with another design, and the bending tool is used to directly bend the third section 52 by the preset bending angle α, so that the relative positions of the first section 51 and the second section 53 are changed, thereby achieving the same bending effect as in the above embodiments.
In order to match with the manufacturing method of the heat exchanger, a torsion tool for twisting a single flat tube and a bending tool for bending the twisted flat tube are designed, and the specific structures of the two tools are explained in detail as follows:
as a specific embodiment of the present application, as shown in fig. 2 and 5, a twisting tool is provided, when the twisting tool is used, the twisting tool can be fixed on a working table to improve stability when twisting a flat tube, the twisting tool is used for twisting a single heat exchange tube 5, the twisting tool is used for twisting the single heat exchange tube 5, so that a corresponding position of the single heat exchange tube 5 required by a manufacturing method reaches a preset twisting angle θ, and the twisting tool is simple in structure and facilitates twisting of the single heat exchange tube 5.
Should twist reverse frock includes: the heat exchange tube comprises a first part 1, wherein the first part 1 comprises first grooves 12 which are oppositely arranged, and two ends of the heat exchange tube 5 are respectively arranged in the corresponding first grooves 12; a third portion 3; the third portion 3 is connected to a portion of the heat exchange tube 5 located between the two first grooves 12 and twists the heat exchange tube 5 located between the two first grooves 12 such that the heat exchange tube 5 located between the two first grooves 12 is disposed obliquely with respect to the tube plane 54.
Specifically, first part 1 is as heat exchange tube 5's installation department, including two fixing bases 11 that set up relatively, through 4 fixed connection of connection structure between two fixing bases 11, and the plane of symmetry has between two fixing bases 11, the length direction of fixing base 11 (as arrow point direction in fig. 5) is parallel with this plane of symmetry, along the length direction of fixing base 11, be equipped with a plurality of first recesses 12 of arranging in proper order on the fixing base 11, along the direction of perpendicular to plane of symmetry, first recess 12 on two fixing bases 11 that are in the same position is a set of, a flat pipe is installed in two first recesses 12 of same set of, in order to realize spacing to flat pipe. After the installation is completed, the third part 3 is connected with the part of the heat exchange tube 5 positioned between the two first grooves 12, so that the torsion of the part of the heat exchange tube 5 between the two first grooves 12 is realized by controlling the rotation of the third part 3.
Wherein, in order to guarantee flat pipe and first recess 12 installation complex stability, flat pipe can be for flat pipe direct joint in first recess 12 with first recess 12's cooperation, perhaps makes the clearance of flat pipe when the cooperation is less than 1mm in first recess 12, and when homoenergetic realized flat pipe mounting in first recess 12, first recess 12 was spacing to flat pipe to the displacement of restriction flat pipe along length direction, thickness direction, width direction.
In addition, flat pipe and first recess 12 also can be for being greater than 1 mm's clearance fit, during this kind of cooperation, in order to improve the stability of cooperation part, as shown in fig. 5, should twist reverse the frock and still include spacing portion 6, this spacing portion 6 is used for spacing to installing the flat pipe in first recess 12, can be with flat pipe joint and respectively the butt in the stopper (as shown in fig. 6) of two fixing base 11 outer walls, also can be other structures that play limiting displacement, as long as can be when flat pipe and first recess 12 cooperate, can restrict the motion of flat pipe relative first recess 12 can, do not specifically prescribe a limit herein.
More specifically, the first grooves 12 in different groups along the length direction of the fixing base 11 may be designed as the same grooves. When using, install the flat pipe of same model respectively in the first recess 12 of each group, it is spacing to realize a plurality of flat pipes. After accomplishing, along fixing base 11 length direction, control third part 52 from one end and twist reverse flat pipe one by one, the direction of torsion of a plurality of flat pipes is unanimous to realize twisting a plurality of flat pipes on the frock of twisting, twist reverse the in-process, the distance between the first recess 12 in the adjacent group as long as guarantee can not mutual interference when twisting preset torsion angle.
Along the length direction of the fixing seat 11, the first grooves 12 in different groups can also be designed into different grooves, and the first grooves 12 in the same group are the same. When the tool is used, according to the types of the flat pipes, the corresponding group capable of being matched with the flat pipes and the corresponding third part 3 in torsional fit with the flat pipes are selected, a special torsional tool does not need to be designed for the flat pipes of different types, the manufacturing cost of the tool is saved, and the universality of the torsional tool is improved.
In order to twist the third portion 3 of the flat pipe to the preset twist angle θ, the portions of the first section 51 and the second section 53 connected to the third section 52 are respectively installed in the first grooves 12 in the same group, so that the third section 52 is located between the two first grooves 12, and the first plane 55 is parallel to the vertical plane. The third portion 3 is mated with the third section 52 and the center of the third portion 3 is aligned with the centerline of the third section 52 to twist the third section 52.
In addition, in order to ensure the consistency of each flat pipe twisted by the twisting tool, the twisting tool further comprises a second part 2, the second part 2 comprises a matching block 21, and the matching block 21 is connected with the first part 1; the mating block 21 has a first surface 22, the first surface 22 being inclined from a plane parallel to the tube plane 54 in the direction of rotation of the third portion 3; the first surface 22 is inclined at the same angle as the preset torsion angle theta. The two ends of the matching block 21 are respectively connected to the two fixing seats 11, the fixing seats 11 are located between the two first grooves 12 in the adjacent groups, and the matching block 21 is perpendicular to a symmetrical plane between the fixing seats 11. The specific position of the matching block 21, the inclination and the inclination direction of the first surface 22 arranged on the matching block, the distance of the first grooves 12 between different groups designed according to different flat tube models, and the difference of the preset torsion angle theta can be adaptively adjusted, and are not described herein again.
In order to better match with the flat tube for the third portion 3 to realize the twisting of the third portion 3, as shown in fig. 2, 3 and 4, the connecting block 32 is used for connecting with the third segment 52, and the first handle 31 is connected to one end of the connecting block 32 for holding to drive the connecting block 32 to rotate. The other end of the connecting block 32 is provided with a second groove 33, the second groove 33 is the same as the corresponding first groove 12, and is used for installing the flat pipe in the first groove 12, and the second groove 33 extends into the third section 52 along the width direction of the third section 52 to be matched with the third section 52, similarly, the second groove 33 can be clamped with the third section 52 or in clearance fit with a diameter smaller than 1mm, or in clearance fit with a diameter larger than 1mm, as long as it can be ensured that when the flat pipe is twisted, the second surface 34 of the second groove 33 is always limited with the third pipe plane. The second surface 34 is a side wall surface of the second groove 33 adjacent to the mating block 21 after connecting with the third section 52.
Alternatively, the second surface 34 may be an arc-shaped surface or a flat surface, as long as there is a portion that is always abutted against the third pipe flat surface when twisted, and is not particularly limited herein.
Moreover, in order to ensure that the connecting block 32 can be quickly and accurately connected to a fixed matching position when being matched with the flat tube, and the center line of the connecting block 32 is overlapped with the center line of the third section 52, as shown in fig. 3 and 4, the fifth groove 35 is formed on the connecting block 32 corresponding to the second groove 33, and as long as the center of the third section 52 is overlapped with the symmetrical center of the fifth groove 35, the quick positioning of the connecting block 32 can be realized. It should be understood that the first reference line 36 may also be disposed at the center of the connecting block 32 (as shown in fig. 6), and the first reference line 36 may be quickly aligned with the center line of the third segment 52, which is not limited in this respect.
As shown in fig. 7, the present application further provides a bending tool, the bending tool is configured to bend the twisted heat exchange tube 5, a tube plane 54 is formed on a surface of the heat exchange tube 5, the heat exchange tube 5 includes a first section 51, a second section 53, and a third section 52, the third section 52 is connected to two ends of the first section 51 and the second section 53, the tube plane 54 includes a first tube plane of the first section 51, a second tube plane of the second section 53, and a third tube plane of the third section 52, the first tube plane and the second tube plane are located on the same plane to form a first plane 55, the third section 52 is twisted with respect to the first section 51 and the second section 53, and the third tube plane is deviated from the first plane 55. The bending tool is adopted to realize the bending of the single heat exchange tube 5, so that the single heat exchange tube 5 required by the manufacturing method is bent on the basis of the preset torsion angle theta, the deformation of a torsion part is reduced, and the bending tool is simple in structure and convenient for bending the single twisted heat exchange tube 5.
Specifically, this frock of bending includes: a fourth section 7, the fourth section 7 being adapted to receive the third section 52, the fourth section 7 having a central axis, the central axis being perpendicular to the first plane 55; the fifth part 8 and the sixth part 9 are respectively used for being connected with the first section 51 and the second section 53, the fifth part 8 and the sixth part 9 can rotate around the central shaft, and when the bending tool bends the heat exchange tube 5, a plane formed by the rotation tracks of the fifth part 8 and the sixth part 9 is parallel to the first plane 55.
Specifically, the fourth portion 7 is used as a mounting portion of the twisted heat exchange tube 5, and when in use, the fourth portion 7 needs to be fixed on a workbench, and the portion of the fourth portion 7, where the heat exchange tube 5 is mounted, needs to extend out of the workbench so as to be in a suspended state. The fourth portion 7 includes a first mounting block 71 and a second mounting block 72, the first mounting block 71 includes a fixing shaft 712 and a fixing portion 711 connected along a length direction, and one end of the fixing portion 711 can be used for fixing connection with a table top, and can also be manually held by a holding structure 711a disposed on the fixing portion 711. The other end of the fixing portion 711 is fixedly coupled to a fixing shaft 712, the fixing shaft 712 having a central axis, and the fixing shaft 712 is used for mounting the twisted flat tube (i.e., the third section 52).
When the twisted flat tube is mounted on the bending tool, as shown in fig. 8, 9 and 10, the twisted flat tube is placed on one side surface of the fixing shaft 712 close to the second mounting block 72, the third section 52 is detachably fixed between the first mounting block 71 and the second mounting block 72 through the fastening device 73 to limit the movement of the flat tube, and after the fixing is completed, the first mounting block 71 is rotatably connected with the fifth part 8 and the sixth part 9, wherein the fifth part 8 and the sixth part 9 are respectively connected with the first section 51 and the second section 53, so that the twisted heat exchange tube 5 is bent.
Alternatively, the fastening device 73 may be a screw and nut combination device, or may be another clamping device, as long as the third section 52 can be detachably fixed between the first mounting block 71 and the second mounting block 72, which is not limited in this application.
In order that the twisted portion of the third segment 52 is not deformed greatly during the bending process, as shown in fig. 8 and 9, the first mounting block 71 has a third surface 712 a; the second mounting block 72 has a fourth surface 721, the third section 52 at least partially abuts between the third surface 712a and the fourth surface 721; the third and fourth surfaces 712a and 721 are inclined with respect to the first plane 55 by the same predetermined torsion angle θ as the third segment 52. That is, the fixing shaft 712 (fixedly connected to one end of the fixing portion 711, which is a part of the first mounting block 71) for position limitation and the second mounting block 72 are provided with a third surface 712a and a fourth surface 721 inclined, respectively, which are arranged opposite and parallel to each other when fitted, for abutting against both surfaces in the thickness direction of the third section 52 (i.e., the third tube surface of the third section 52 and the other surface parallel thereto). In order to achieve a better bending effect, the first section 51 and the second section 53 respectively rotate around the central axis, and the side wall of the fixing shaft 712 of the other portion connected with the third surface 712a is set to be an arc surface inclined at the same angle, so that in the rotating process, after the surface of the third pipe close to one side of the fixing shaft 712 is attached to the third surface 712a, along with the continuation of bending, the other portion of the third section 52 can also be attached to the arc surface, so as to realize the consistency of the bending structure of the third section 52 when different flat pipes are bent.
In addition, in order to realize that the center line of the third section 52 is located in the plane where the central axis is located and realize the rapid positioning and installation of the flat tube on the bending tool, the second reference line 722 is arranged on the second installation block 72, and during installation, the rapid positioning of the flat tube can be realized only by aligning the second reference line 722 with the center line of the third section 52. It should be understood that the second reference line 52 may be replaced by a sixth groove 723, as long as a symmetry center of the sixth groove 723 is aligned with a center line of the third segment 52, and a specific structure thereof is not limited herein.
In addition, in order to avoid the deformation of the first section 51 and the second section 53 along with the bending of the third section 52 in the bending process, the fifth part 8 is provided with a third groove 822, the second section 53 is installed in the third groove 822, and the matching position is the position where the second section 53 is close to the third section 52; the sixth part 9 is provided with a fourth groove 922, the first section 51 is mounted in the fourth groove 922, and the fitting position is a position where the first section 51 is close to the third section 52. It will be understood that the portion of the heat exchange tube 5 between the fifth portion 8 and the sixth portion 9 is the third section 52.
The fifth part 8 and the sixth part 9 respectively comprise a first connecting part 81 and a second connecting part 91, the two connecting parts are the same, one ends of the connecting parts are respectively rotatably connected with the fourth part 7, so that the first connecting part 81 and the second connecting part 91 can rotate around the central shaft at the same time, the other ends of the connecting parts are respectively fixedly connected with the third mounting block 82 and the fourth mounting block 92, optionally, the third mounting block 82 and the fourth mounting block 92 are approximately the same, a third groove 822 and a fourth groove 922 are respectively arranged on the third mounting block 82 and the fourth mounting block 92, and when the third mounting block 82 and the fourth mounting block 92 rotate to contact with the side walls, the openings of the third groove 822 and the fourth groove 922 are opposite or opposite. And the third and fourth grooves 822 and 922 are respectively provided at the same positions of the third and fourth mounting blocks 82 and 92 in the direction of the central axis.
In addition, in this embodiment, as shown in fig. 10, when the twisted flat tube is mounted on the bending tool, the two connecting portions are rotated to respectively drive the third mounting block 82 and the fourth mounting block 92 to move, so that the third groove 822 extends in the flat tube width direction to match the third groove 822 with the second section 53, and the fourth groove 922 extends in the flat tube width direction to match the fourth groove 922 with the first section 51. After the installation is completed, the first section 51 is approximately parallel to the second section 53 along the length direction of the flat tube, so that the connecting lines of the third groove 822 and the fourth groove 922 are in the same straight line.
And first section 51 and second section 53 respectively with fourth recess 922 and the cooperation of third recess 822, in order to avoid the cooperation position to take place the skew in the rotation in-process, first section 51 and second section 53 are spacing in fourth recess 922 and third recess 822 in interference fit respectively. Or on the basis of clearance fit, the limiting part arranged at the matching position realizes limiting.
During bending, the fifth part 8 and the sixth part 9 respectively drive the second section 53 and the first section 51 to rotate around the central shaft, so that the third section 52 is bent, in the process, as shown in fig. 10, the fifth part 8 and the sixth part 9 are driven to simultaneously rotate downwards, the third section 52 is fixed above the central shaft, and the third section 52 is bent by taking the central shaft as an axis, so that after the third section is bent by a preset angle of 90 degrees, the third section 52 is approximately in a U-shaped structure on the first plane 55, and the first section 51 is parallel to the second section 53, so that the flat pipe can be bent.
In order to ensure that the bent flat tube is formed in a projection on the first plane 55, the U-shaped structure of the bent flat tube is symmetrical along the center, as shown in fig. 9, a positioning portion 10 is provided on the first mounting block 71, the positioning portion 10 is located below a fixed shaft 74 on the opposite side of the third surface 741, when the fifth portion 8 and the sixth portion 9 rotate and respectively abut against the positioning portion 10, the rotation of the fifth portion 8 and the sixth portion 9 is limited, i.e. the bending is finished, so as to ensure that the rotation angles of the fifth portion 8 and the sixth portion 9 are the same.
Optionally, a second handle 821 is provided on any one of the third mounting block 82 or the first connecting portion 81, and a third handle 921 is provided on any one of the fourth mounting block 92 or the second connecting portion 91, so as to be able to conveniently operate the fifth portion 8 and the sixth portion 9 to rotate around the central axis.
It is noted that a portion of this patent application contains material which is subject to copyright protection. The copyright owner reserves the copyright rights whatsoever, except for making copies of the patent files or recorded patent document contents of the patent office.
Claims (10)
1. A method of manufacturing a heat exchanger, comprising the steps of: providing a heat exchange tube (5), wherein the heat exchange tube (5) is a flat tube, the heat exchange tube (5) comprises a first section (51), a second section (53) and a third section (52), and the first section (51) and the second section (53) are connected to two ends of the third section (52);
providing a twisting tool, wherein the twisting tool twists the third section (52) of one heat exchange tube (5) relative to the first section (51) and the second section (53) by a preset twisting angle theta;
providing a bending tool, wherein the bending tool bends the third section (52) by a preset bending angle alpha so as to change the relative position of the first section (51) and the second section (53); or the bending tool bends the first section (51) and the second section (53) so that the relative positions of the first section (51) and the second section (53) are changed, and the third section (52) bends the preset bending angle alpha;
-providing a collector, assembling the heat exchange tubes (5) and the collector together.
2. A manufacturing method according to claim 1, wherein the heat exchange tube (5) surface has tube planes (54), the tube planes (54) including a first tube plane of the first section (51), a second tube plane of the second section (53) and a third tube plane of the third section (52), the first and second tube planes being in the same plane forming a first plane (55), the third tube plane being in the first plane (55) before the heat exchange tube (5) is twisted by the preset twist angle θ;
and after the third section (52) is twisted by the preset twisting angle theta, the plane of the third pipe deviates from the first plane (55).
3. The manufacturing method according to claim 2, characterized in that, before bending the third section (52) by a preset bending angle α or bending the first section (51) and the second section (53), the first tube plane and the second tube plane are both located on the first plane (55), and the extension of the central axis of the first section (51) coincides with the extension of the central axis of the second section (53);
when the third section (52) is bent by the preset bending angle alpha or the first section (51) and the second section (53) are bent, in the first plane (55), the first pipe plane and the second pipe plane respectively rotate around a first axis, and the rotation directions of the first pipe plane and the second pipe plane are opposite, so that the cross section of the third section (52) is approximately U-shaped;
the first tube plane and the second tube plane are within the first plane (55) before, after, and during rotation;
wherein the first axis is perpendicular to the first plane (55).
4. The manufacturing method according to claim 3, characterized in that, after bending the third section (52) by the preset bending angle α or bending the first section (51) and the second section (53), the first tube plane and the second tube plane are juxtaposed in the first plane (55), and a central axis extension of the first section (51) is parallel to a central axis extension of the second section (53).
5. The manufacturing method according to claim 2, wherein the heat exchange tube (5) is twisted by the twisting tool,
the twist reverse frock includes:
a first part (1) and a third part (3);
the torsion method of the torsion tool comprises the following steps:
the heat exchange tube (5) is arranged on the first part (1), and both ends of the heat exchange tube (5) are connected with the first part (1);
the third part (3) is connected with the third section (52) and drives the third section (52) to rotate, so that the plane of the third pipe at least partially deviates from the first plane (55), and at least part of the heat exchange pipe (5) is abutted against the third part (3) in the process of driving the third part (3) to drive the third section (52) to twist by the preset twisting angle theta.
6. Manufacturing method according to claim 3 or 4, characterized in that the third section (52) is bent by means of the bending tool,
the frock of bending includes:
a fourth section (7), a fifth section (8) and a sixth section (9);
the bending method of the bending tool comprises the following steps:
-mounting the third section (52) to the fourth part (7), the fourth part (7) having a central axis, the central axis coinciding with the first axis;
-connecting the end of the first segment (51) close to the third segment (52) to the fifth part (8) and the end of the second segment (53) close to the third segment (52) to the sixth part (9);
and rotating the fifth part (8) and the sixth part (9) around the first axis, so that the first pipe plane and the second pipe plane respectively rotate around the first axis in the first plane (55), and the third section (52) is bent to be attached to the surface of the fourth part (7).
7. The utility model provides a twist reverse frock for twist reverse heat exchange tube (5), its characterized in that, heat exchange tube (5) surface has pipe plane (54), before heat exchange tube (5) was twisted, the plane of pipe plane (54) place is first plane (55), twist reverse frock and include:
a first part (1), wherein the first part (1) comprises oppositely arranged first grooves (12), and the first grooves (12) are used for mounting two ends of the heat exchange tube (5);
a third part (3) of the first part,
the third part (3) is used for connecting with the part of the heat exchange tube (5) positioned between the two first grooves (12) and driving the heat exchange tube (5) positioned between the two first grooves (12) to twist, so that the heat exchange tube (5) positioned between the two first grooves (12) is obliquely arranged relative to the first plane (55).
8. The twisting tooling according to claim 7, further comprising a second part (2) connected to the first part (1), the second part (2) comprising a mating block (21);
the fitting block (21) has a first surface (22) for abutting against the heat exchange tube (5), the first surface (22) being inclined from a plane parallel to the first plane (55) to a direction of rotation of the third portion (3);
the inclination angle of the first surface (22) is the same as the preset torsion angle theta.
9. A bending tool is characterized in that the bending tool is used for bending a twisted heat exchange tube (5), the surface of the heat exchange tube (5) is provided with a tube plane (54), the heat exchange tube (5) comprises a first section (51), a second section (53) and a third section (52), the third section (52) is connected to both ends of the first section (51) and the second section (53), the tube planes (54) comprising a first tube plane of the first section (51), a second tube plane of the second section (53) and a third tube plane of the third section (52), the first tube plane and the second tube plane are in the same plane forming a first plane (55), -said third segment (52) is twisted with respect to said first segment (51) and said second segment (53), said third tube plane being offset from said first plane (55); the frock of bending includes:
a fourth portion (7), said fourth portion (7) being adapted to receive said third section (52), said fourth portion (7) having a central axis, said central axis being perpendicular to said first plane (55);
the fifth portion (8) and the sixth portion (9) are respectively used for being connected with the first section (51) and the second section (53), the fifth portion (8) and the sixth portion (9) can rotate around the central shaft, and when the bending tool bends the heat exchange tube (5), a plane formed by rotation tracks of the fifth portion (8) and the sixth portion (9) is parallel to the first plane (55).
10. Bending tooling according to claim 9, wherein the fifth portion (8) is provided with a third groove (822), the third groove (822) being used for the mounting of the second section (52);
the sixth portion (9) is provided with a fourth groove (922), the fourth groove (922) being used for mounting of the first section (51);
the fourth part (7) comprises a third surface (712a) and a fourth surface (721), and when the bending tool bends the heat exchange tube (5), at least part of the third section (52) abuts between the third surface (712a) and the fourth surface (721);
the third surface (741) and the fourth surface (721) are inclined with respect to the first plane (55) at the same angle as a predetermined torsion angle θ of the third section (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910995186.1A CN112676409A (en) | 2019-10-18 | 2019-10-18 | Torsion tool, bending tool and manufacturing method of heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910995186.1A CN112676409A (en) | 2019-10-18 | 2019-10-18 | Torsion tool, bending tool and manufacturing method of heat exchanger |
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| Publication Number | Publication Date |
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| CN112676409A true CN112676409A (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910995186.1A Pending CN112676409A (en) | 2019-10-18 | 2019-10-18 | Torsion tool, bending tool and manufacturing method of heat exchanger |
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| CN (1) | CN112676409A (en) |
Cited By (1)
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Application publication date: 20210420 |