Finned heat exchanger pre-assembly tool

Abstract

The application relates to the field of heat pump unit manufacturing, and relates to a finned heat exchanger pre-assembly tool, which is characterized in that two groups of tool cars are arranged on a track assembly, each group of tool cars is connected with a bracket through a rotating shaft, two groups of fins to be machined are respectively arranged on the brackets of the two groups of tool cars, and the brackets are driven to rotate through an extension mechanism, so that the inclination angle adjustment of the two groups of fins can be realized, the problems of poor precision and high labor intensity caused by the heavy weight of the fins during traditional manual hoisting are solved, the limitation that a customized tool relies on a fixed angle and cannot be iterated twice is broken, the inclination angle requirements of different heat exchanger models can be met, the tool universality is remarkably improved, and the problem of exclusive tool abandonment caused by product iteration can be effectively avoided; the device ensures the angle adjustment of the two brackets through mechanical linkage, ensures that the included angles of the two fins are accurately matched with assembly requirements, and effectively improves the assembly precision and the assembly efficiency.

Description

Technical Field

[0001] This application relates to the field of heat pump unit manufacturing, and specifically to a pre-assembly fixture for a finned heat exchanger. Background Technology

[0002] With the transformation of the global energy structure and the increasing awareness of environmental protection, heat pump technology, as a highly efficient, energy-saving, and environmentally friendly heating and cooling technology, has received widespread attention and rapid development globally in recent years. Especially in my country, with the support of national policies and a significant increase in market demand, the heat pump industry is in a stage of rapid development, and the processing quality and production efficiency of heat pump products are receiving increasing attention. As an important step in the production process, the pre-installation of finned heat exchangers can effectively improve processing efficiency, while the installation accuracy of finned heat exchangers affects the processing quality of subsequent processes.

[0003] Currently, there are two methods for pre-installing finned heat exchangers: First, following the assembly sequence of the unit's sheet metal, the sheet metal frame of the unit is assembled first. The finned heat exchanger is then hoisted onto the sheet metal bracket by manual handling or lifting. The fixed angle of the finned heat exchanger is manually adjusted to mate it with the sheet metal connectors. After confirming that it is in place, fasteners are used to connect the finned heat exchanger to the sheet metal parts, completing the finned heat exchanger installation. Second, a custom-made finned heat exchanger mounting bracket is used. This type requires the fabrication of a special mounting bracket based on the unit's sheet metal structure. The mounting angle is fixed, and the finned heat exchanger is placed on the mounting bracket without further angle adjustment. This method is convenient, quick, and has high processing efficiency for a single product.

[0004] However, both of the above pre-installation methods have obvious shortcomings:

[0005] 1. The finned heat exchanger and the triangular plate are installed in separate steps, which results in low assembly efficiency. It relies on manual adjustment of the angle of the finned heat exchanger. In addition, the overall weight of the finned heat exchanger is relatively large, which makes the labor intensity of the employees high and the installation accuracy low, which can easily cause installation errors and is inconvenient for subsequent operations.

[0006] 2. The use of custom-made finned heat exchanger mounting brackets has poor versatility. During production, the corresponding custom-made finned heat exchanger mounting brackets need to be selected according to the product model. As the number of production models increases, a large number of custom-made toolings are required. These toolings occupy a large area, which is not conducive to storage. Moreover, after the unit model is iterated, the custom-made toolings will also be discarded, which wastes resources.

[0007] Therefore, there is an urgent need for a finned heat exchanger pre-assembly fixture that can reduce the intensity of manual assembly, achieve precise assembly, high installation efficiency, meet the requirements for fin pre-assembly angle adjustment, and has good versatility. Utility Model Content

[0008] To solve, or at least partially solve, the above-mentioned technical problems, this application provides a pre-assembly fixture for a finned heat exchanger, comprising:

[0009] Track components;

[0010] Two sets of tooling cars are mounted on the track assembly, and the two sets of tooling cars can slide along the track assembly to move relatively closer or further apart;

[0011] Each set of tooling carriages is connected to a bracket via a pivot shaft. The bracket is used to install fins. A telescopic mechanism is provided between the bracket and the tooling carriage. The telescopic mechanism is used to control the bracket to rotate around the pivot shaft to adjust the angle formed between the fin and the fin on another set of tooling carriages.

[0012] Optionally, the track assembly includes two parallel linear guide rails, and the two sets of tooling carriages are arranged in pairs on the linear guide rails;

[0013] Each of the tooling carriages includes a movable frame, and a plurality of sliders are provided at the bottom of the movable frame, the sliders being slidably connected to the linear guide rail.

[0014] Optionally, the slider is provided with an adjustable locking rod, which is adjusted to couple with the linear track to fix the slider on the linear track.

[0015] Optionally, the bracket includes a rotating frame, which is connected to the movable frame via the rotating shaft. The rotating shaft is parallel to the plane containing the two linear guide rails and perpendicular to the linear guide rails.

[0016] Optionally, one end of the movable frame is provided with a bracket, the bracket having a first crossbeam parallel to the pivot, and the bottom of the rotating frame is connected to the first crossbeam via the pivot.

[0017] Optionally, the bottom of the rotating frame has a slot that extends toward the upper surface of the rotating frame and is used to support fins mounted on the upper surface of the rotating frame.

[0018] Optionally, a second crossbeam is provided on the movable frame, and a third crossbeam is provided on the rotating frame. The second and third crossbeams are parallel to the rotating shaft, and one end of the telescopic mechanism is rotatably connected to the second crossbeam and the other end is rotatably connected to the third crossbeam.

[0019] Optionally, the telescopic mechanism includes any one of an electric push rod, a hydraulic telescopic rod, a pneumatic telescopic rod, and a manually adjustable threaded sleeve rod.

[0020] Optionally, an angle recognition device is provided between the first crossbeam and the rotating shaft to identify the rotation angle of the rotating frame relative to the first crossbeam.

[0021] Optionally, the straight track is provided with a length marker, and each of the two sets of tooling cars is provided with an indicator corresponding to the length marker. The indicator is used to identify the relative distance between the two sets of tooling cars.

[0022] The finned heat exchanger pre-assembly fixture provided in this application features two sets of fixture carriages mounted on a track assembly. Each carriage is connected to a bracket via a rotating shaft. The two sets of fins to be processed are respectively mounted on the brackets of the two fixture carriages. By driving the brackets to rotate through a telescopic mechanism, the tilt angle of the two sets of fins can be adjusted. The distance between the two sets of brackets can be flexibly and adaptively adjusted by sliding the fixture carriages along the track. Combined with the linkage angle control of the telescopic mechanism driving the brackets to rotate around the rotating shaft, this solution not only solves the problems of poor precision and high labor intensity caused by the heavy weight of the fins in traditional manual hoisting, but also overcomes the limitation of customized fixtures relying on fixed angles and making secondary iteration difficult. The device employs a modular structure with a telescopic mechanism and rotating brackets to achieve stepless angle adjustment, enabling the same tooling to adapt to the tilt angle requirements of different heat exchanger models. This significantly improves the versatility of the tooling and effectively avoids the problem of discarding custom tooling due to product iterations. Simultaneously, the device ensures the angle adjustment of both brackets through mechanical linkage, guaranteeing precise matching of the included angle of the fins on both sides to the assembly requirements. This improves assembly efficiency while reducing installation errors, laying a high-precision benchmark for subsequent processes such as refrigerant pipeline welding and fin sealing. This achieves a comprehensive technical effect of improving assembly quality consistency, reducing tooling investment costs, and improving the working environment. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this application, the relevant drawings will be briefly described below. It is understood that the drawings described below are only for illustrating some embodiments of this application, and those skilled in the art can obtain many other technical features and connections not mentioned herein based on these drawings.

[0024] Figure 1 A three-dimensional schematic diagram of the pre-assembly fixture for the finned heat exchanger of this application;

[0025] Figure 2 A schematic side view of the pre-assembly fixture for the finned heat exchanger of this application;

[0026] Figure 3 A schematic top view of the pre-assembly fixture for the finned heat exchanger of this application;

[0027] Figure 4 This is a schematic diagram showing the usage state of the pre-assembly fixture for the finned heat exchanger of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10. Linear track; 11. Channel steel base;

[0030] 20. Tooling carriage; 21. Slider; 22. Locking rod; 23. Bracket; 24. First crossbeam; 25. Second crossbeam;

[0031] 30. Shaft;

[0032] 40. Bracket; 41. Slot; 42. Third crossbeam;

[0033] 50. Telescopic mechanism; 51. Sleeve; 52. Hinge;

[0034] 60. Fins;

[0035] 70. Sheet metal triangle plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0039] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0040] like Figures 1 to 3 As shown, this embodiment provides a pre-assembly fixture for a finned heat exchanger. The pre-assembly fixture has two sets of tooling carriages 20, which are arranged on a track assembly and can slide along the track assembly to move relatively closer or further apart.

[0041] Each tooling carriage 20 is equipped with a bracket 40, which is connected to the tooling carriage 20 via a pivot 30, allowing the bracket 40 to rotate relative to the tooling carriage 20 around the pivot 30.

[0042] Each tooling carriage 20 is also equipped with a telescopic mechanism 50. One end of the telescopic mechanism 50 is movably connected to the tooling carriage 20, and the other end is movably connected to the bracket 40. In this embodiment, the telescopic mechanism 50 serves as a driving device for the movement of the bracket 40 and is used to support the bracket 40, ensuring its stability. Through the telescopic movement of the telescopic mechanism 50, the bracket 40 can be driven to rotate relative to the tooling carriage 20 around the pivot 30.

[0043] In this embodiment, the bracket 40 is used to install the fins 60. Each of the two sets of tooling carriages 20 has a set of fins 60 installed on its bracket 40. Thus, by sliding the two sets of tooling carriages 20 relative to each other on the track assembly, the relative distance between the two sets of fins 60 to be assembled can be adjusted. By adjusting the extension and retraction of the telescopic mechanism 50, the relative rotation of the bracket 40 causes the fins 60 to rotate. The brackets 40 on the two sets of tooling carriages 20 can rotate independently or synchronously, thereby adjusting the tilt angle of the two sets of fins 60 to be assembled. By adjusting the included angle of the two sets of fins 60, the appropriate position of the fins 60 can be controlled, which is beneficial for assembling the two sets of fins 60.

[0044] Please see Figure 4 As shown, the included angle of the two sets of fins 60 is adjusted by rotating the two sets of brackets 40 so that the included angle matches the angle of the sheet metal triangle plate 70 to be assembled. After the angle adjustment is completed, the tooling carriage 20 is fixed relative to the track assembly, the telescopic mechanism 50 is fixed in position, and the brackets 40 are kept in a fixed state. Then, the sheet metal triangle plate 70 is installed on one side of the two sets of fins 60 to complete the assembly of the two sets of fins 60.

[0045] The finned heat exchanger pre-assembly fixture provided in this embodiment allows for flexible and adaptive adjustment of the spacing between the two sets of brackets 40 by sliding two sets of fixture carriages 20 along the track assembly. Combined with the linkage angle control of the telescopic mechanism 50 driving the brackets 40 to rotate around the rotating shaft 30, it not only solves the problems of poor accuracy and high labor intensity caused by the large weight of the fins during traditional manual hoisting, but also breaks through the limitation of customized fixtures relying on fixed angles and making it difficult to iterate twice.

[0046] Secondly, this embodiment adopts a modular structure with telescopic mechanism 50 and bracket 40 rotating to realize stepless angle adjustment function, so that the same set of tooling can adapt to the tilt angle requirements of different heat exchanger models, significantly improving the versatility of tooling and effectively avoiding the problem of discarding dedicated tooling due to product iteration.

[0047] Furthermore, the device ensures that the double-sided brackets can be adjusted at a 40-degree angle through mechanical linkage, and ensures that the 60-degree included angle of the fins on both sides is precisely matched with the assembly requirements. This improves assembly efficiency and reduces installation errors, laying a high-precision benchmark for subsequent processes such as refrigerant pipeline welding and fin sealing. This achieves the comprehensive technical effects of improving assembly quality consistency, reducing tooling costs, and improving the working environment.

[0048] like Figure 1 and Figure 3 As shown, the track assembly in this embodiment includes two parallel linear guide rails 10, which are respectively mounted on the channel steel base 11. Two sets of tooling carriages 20 are arranged in pairs on the linear guide rails 10. The two linear guide rails 10 ensure the movement balance of the tooling carriages 20. The simultaneous arrangement of the two sets of tooling carriages 20 on the same linear guide rail 10 reduces the error when the two sets of tooling carriages 20 move, ensuring that the two sets of fins 60 to be assembled can move on the same straight line, thus ensuring the accuracy of assembly.

[0049] In this embodiment, each tooling carriage 20 adopts the form of a movable frame, such as a rectangular frame. The movable frame can cooperate with two linear guide rails 10 to ensure the stability of the tooling carriage 20. Several sliders 21 are provided at the bottom of the movable frame. The sliders 21 are slidably connected to the linear guide rails 10 to ensure the reciprocating motion of the movable frame along the linear guide rails 10.

[0050] like Figure 1 As shown, the slider 21 is provided with an adjustable locking rod 22, which is used to be adjusted to couple with the linear track 10 to fix the slider 21 on the linear track 10.

[0051] Specifically, the locking rod 22 can be a fastening bolt, which is threadedly engaged with the slider 21. By tightening the fastening bolt, the fastening bolt can be moved toward the surface of the linear track 10 until the fastening bolt abuts against the surface of the linear track 10, thus fixing the slider 21 relative to the linear track 10.

[0052] Of course, in some embodiments, the locking rod 22 may also be other structures that can fix the slider 21 relatively on the linear track 10. This embodiment does not limit it to a single structure.

[0053] In one embodiment, the slider 21 can also be replaced by a pulley, and the above effect can also be achieved by moving the pulley on the linear guide rail 10.

[0054] Similarly, the tooling carriage 20 in this embodiment is not limited to a movable frame; other carrier structures capable of mounting the bracket 40 can also be used, as long as they can drive the bracket 40 to move back and forth along the linear track 10. Therefore, this embodiment does not impose a unique limitation on the specific structure of the tooling carriage 20.

[0055] Please see as follows Figure 1 , Figure 3 and Figure 4 In this embodiment, the bracket 40 adopts a rotating frame, which is connected to the movable frame via a rotating shaft 30. The rotating shaft 30 is parallel to the plane containing the two linear guide rails 10 and perpendicular to the linear guide rails 10. In this embodiment, the rotating shafts 30 of the two sets of tooling carriages 20 are parallel, which ensures that the rotation angle of the two sets of fins 60 after installation is controllable, and ensures that the position of the two sets of fins 60 can be adapted to the sheet metal triangular plate 70.

[0056] The rotating frame is preferably a rectangular frame, which facilitates better support for the fins 60.

[0057] Furthermore, such as Figure 1 and Figure 2 As shown, a support 23 is provided at one end of the movable frame. The support 23 is vertically arranged, and a first crossbeam 24 parallel to the rotating shaft 30 is fixedly provided at the upper end of the support 23. The bottom of the rotating frame is connected to the first crossbeam 24 through the rotating shaft 30.

[0058] The first crossbeam 24 serves as the base supporting the bracket 40, and can be adapted to the rectangular frame bracket 40 to ensure the stability of the bracket 40. In addition, the bracket 23 is correspondingly higher than the height of the bracket 40, providing better space for the bracket 40 and the fins 60 to move.

[0059] like Figure 1 and Figure 2 As shown, the bottom of the rotating frame has a slot 41 that extends towards the upper surface of the rotating frame. The slot 41 is used to support the fins 60 mounted on the upper surface of the rotating frame. Since the bracket 40 is often in an inclined state, the fins 60 are prone to slipping or shifting when placed on the bracket 40. The slot 41 can support the fins 60 from the bottom to prevent them from slipping or shifting.

[0060] Preferably, the slot 41 can be a number of hook-shaped pieces protruding from the surface of the bracket 40. The slot 41 can be L-shaped, surrounding the bottom of the fin 60 to prevent the fin 60 from falling off due to shaking or the fin 60 from tipping over due to excessive tilt of the bracket 40.

[0061] Preferably, the slot 41 can be detachably connected to the bottom of the bracket 40 so that the slot 41 can be removed when hoisting the fin 60, preventing the slot 41 from affecting the vertical hoisting of the fin 60.

[0062] This embodiment does not impose a unique limitation on the structure of the slot 41. The slot 41 only needs to be able to prevent the fins 60 from slipping off the bracket 40.

[0063] In one embodiment, the bracket 40 can be configured in an L-shape, that is, the bracket 40 itself has a built-in slot 41 structure for limiting the fins 60.

[0064] like Figure 1 and Figure 4 As shown, in one embodiment, a second crossbeam 25 is provided on the tooling carriage 20 with a movable frame, and a third crossbeam 42 is provided on the bracket 40 with a rotating frame. The second crossbeam 25 and the third crossbeam 42 are parallel to the rotating shaft 30. One end of the telescopic mechanism 50 is rotatably connected to the second crossbeam 25, and the other end is rotatably connected to the third crossbeam 42. The second crossbeam 25 and the third crossbeam 42 serve as the connection points with the telescopic mechanism 50, and play a role in transmitting power and supporting force between the tooling carriage 20 and the bracket 40.

[0065] Preferably, the two ends of the telescopic mechanism 50 are respectively connected to the middle positions of the second crossbeam 25 and the third crossbeam 42 to ensure the balance of the force applied to the bracket 40.

[0066] Since the bracket 40 rotates relative to the tooling carriage 20, the two ends of the telescopic mechanism 50 are movably connected to the second crossbeam 25 and the third crossbeam 42.

[0067] Specifically, such as Figure 4 As shown, one end of the telescopic mechanism 50 has a sleeve 51, and the third crossbeam 42 is a cylindrical rod. The sleeve 51 is sleeved on the cylindrical rod. In this way, while the telescopic mechanism 50 extends and retracts, the sleeve 51 rotates on the cylindrical rod, realizing the conversion of the linear motion of the telescopic mechanism 50 into the rotational motion of the third crossbeam 42.

[0068] The other end of the telescopic mechanism 50 is rotatably connected to the second crossbeam 25 via a hinge 52. When the telescopic mechanism 50 moves in telescopic motion, the rotation of the third crossbeam 42 causes the telescopic mechanism 50 to deflect, and the hinge 52 realizes the deflection of the telescopic mechanism 50, ensuring the normal telescopic movement of the telescopic mechanism 50.

[0069] In this embodiment, the telescopic mechanism 50 can be any one of an electric push rod, a hydraulic telescopic rod, a pneumatic telescopic rod, or a manually adjustable threaded sleeve rod; this embodiment does not limit it to a single type.

[0070] It is worth mentioning that the two sets of tooling cars 20 mentioned in this embodiment can have the same structure. The two sets of tooling cars 20 are arranged symmetrically on the straight track 10. In conjunction with the above-mentioned drawings, this embodiment has marked and described one set of tooling cars 20, and the structural description of the other set of tooling cars 20 is also the same.

[0071] For example, the two sets of tooling carriages 20 can be described as the first tooling carriage and the second tooling carriage, respectively. The brackets 40 can be the first bracket on the first tooling carriage and the second bracket on the second tooling carriage, respectively. The rotating shaft 30 is also divided into the first rotating shaft and the second rotating shaft, and the telescopic mechanism 50 is divided into the first telescopic mechanism and the second telescopic mechanism.

[0072] As a further improvement, in one embodiment, an angle recognition device is provided between the first crossbeam 24 and the rotating shaft 30 to identify the rotation angle of the rotating frame relative to the first crossbeam 24.

[0073] The angle recognition device can be an angle marker on the first crossbeam 24, and a pointer corresponding to the angle marker can be provided on the rotating frame or the rotating shaft 30. When the rotating frame rotates, the pointer on the rotating frame rotates and points to the corresponding scale on the angle marker, so that the rotation angle of the bracket 40 can be seen intuitively, and thus the tilt angle of the fin 60 can be known, so as to match it with the sheet metal triangle plate 70.

[0074] In one embodiment, the angle recognition device can be an angle sensor installed on the rotating shaft 30. The angle sensor is connected to a smart terminal, and when the bracket 40 rotates, its rotation angle is directly displayed through the smart terminal for reference by the staff, which helps to improve the assembly accuracy of the fins 60.

[0075] Furthermore, in one embodiment, a length mark is provided on the linear track 10, and an indicator corresponding to the length mark is provided on each of the two sets of tooling carriages 20. When the two sets of tooling carriages 20 move relative to each other, the indicator can move with the tooling carriages 20 and point to the corresponding length mark, so as to intuitively understand the distance between the two sets of tooling carriages 20, thereby controlling the installation distance of the two sets of fins 60 and further improving the assembly accuracy of the fins 60.

[0076] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pre-assembly fixture for a finned heat exchanger, characterized in that, include: Track components; Two sets of tooling carriages (20) are disposed on the track assembly, and the two sets of tooling carriages (20) can slide along the track assembly to move relatively closer or further apart; Each set of tooling carriages (20) is connected to a bracket (40) via a pivot (30). The bracket (40) is used to install fins (60). A telescopic mechanism (50) is provided between the bracket (40) and the tooling carriage (20). The telescopic mechanism (50) is used to control the bracket (40) to rotate around the pivot (30) to adjust the angle formed between the fins (60) and the fins (60) on another set of tooling carriages (20).

2. The finned heat exchanger pre-assembly fixture according to claim 1, characterized in that, The track assembly includes two parallel linear guide rails (10), and two sets of tooling carriages (20) are arranged in pairs on the linear guide rails (10); Each of the tooling carts (20) includes a movable frame, and a plurality of sliders (21) are provided at the bottom of the movable frame, the sliders (21) being slidably connected to the linear guide rail (10).

3. The finned heat exchanger pre-assembly fixture according to claim 2, characterized in that, The slider (21) is provided with an adjustable locking rod (22), which is used to be adjusted to couple with the linear track (10) to fix the slider (21) on the linear track (10).

4. The finned heat exchanger pre-assembly fixture according to claim 2, characterized in that, The bracket (40) includes a rotating frame, which is connected to the movable frame via the rotating shaft (30). The rotating shaft (30) is parallel to the plane containing the two linear guide rails (10) and perpendicular to the linear guide rails (10).

5. The finned heat exchanger pre-assembly fixture according to claim 4, characterized in that, One end of the movable frame is provided with a bracket (23), the bracket (23) has a first crossbeam (24) parallel to the pivot (30), and the bottom of the rotating frame is connected to the first crossbeam (24) through the pivot (30).

6. The finned heat exchanger pre-assembly fixture according to claim 4, characterized in that, The bottom of the rotating frame has a slot (41) that extends toward the upper surface of the rotating frame and is used to support the fins (60) mounted on the upper surface of the rotating frame.

7. The finned heat exchanger pre-assembly fixture according to claim 4, characterized in that, The movable frame is provided with a second crossbeam (25), and the rotating frame is provided with a third crossbeam (42). The second crossbeam (25) and the third crossbeam (42) are parallel to the rotating shaft (30). One end of the telescopic mechanism (50) is rotatably connected to the second crossbeam (25), and the other end is rotatably connected to the third crossbeam (42).

8. The finned heat exchanger pre-assembly fixture according to claim 7, characterized in that, The telescopic mechanism (50) includes any one of an electric push rod, a hydraulic telescopic rod, a pneumatic telescopic rod, and a manually adjustable threaded sleeve rod.

9. The finned heat exchanger pre-assembly fixture according to claim 5, characterized in that, An angle recognition device is provided between the first crossbeam (24) and the rotating shaft (30) to identify the rotation angle of the rotating frame relative to the first crossbeam (24).

10. The finned heat exchanger pre-assembly fixture according to any one of claims 2 to 9, characterized in that, The straight track (10) is provided with a length mark, and the two sets of tooling cars (20) are respectively provided with an indicator corresponding to the length mark. The indicator is used to identify the relative distance between the two sets of tooling cars (20).

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