Regular coiled pipe core body assembling tool

Abstract

The utility model discloses a regular coiled pipe core body assembling tool which comprises a supporting table, a clamping mechanism arranged on the supporting table, a limiting block, a limiting column, a square pipe and a U-shaped metal restraint device, the supporting table is provided with a downwards-sunken containing groove, and the limiting column and the clamping mechanism are oppositely arranged. The upper side and the lower side of a to-be-assembled core make contact with the clamping mechanisms and the limiting columns through square pipes correspondingly, at least one of the left side and the right side is limited through the limiting blocks, and the to-be-assembled core is compressed and shaped after the to-be-assembled core is pressed downwards through the clamping mechanisms. And after the core body in a compressed and shaped state is clamped to the outer sides of the upper square tube and the lower square tube through the two ends of the at least two metal constraining devices, constraining force is generated on the rebounded core body for clamping. The problems that in the traditional manual assembling process of the micro-channel serpentine pipe condenser core, errors are large, efficiency is low, and pseudo soldering is prone to occurring in the later period are solved, the production efficiency is improved, and the product quality is remarkably improved.

Description

Technical Field

[0001] This invention relates to the technical field of serpentine core shaping equipment, and specifically to a regular serpentine core assembly tool. Background Technology

[0002] Microchannel serpentine condensers are a crucial component of air conditioning systems, determining the air conditioner's operational capacity. Some serpentine tubes are relatively regular, with an overall rectangular shape, making them suitable for mass production. However, currently, the assembly of microchannel serpentine condenser cores is primarily done manually, and the assembly tables used lack sufficient limiting mechanisms. Workers rely heavily on their experience to manually adjust pneumatic valves to press the microchannel condenser cores together. This assembly method easily leads to incomplete or faulty soldering at the later stages of production, hindering rapid factory production and impacting work efficiency. Therefore, there is an urgent need for a mechanism that can limit the movement of each component and quickly achieve assembly during the assembly of microchannel serpentine condenser cores. Summary of the Invention

[0003] In order to solve one or more technical problems existing in the prior art, the purpose of this application is to provide a regular serpentine tube core assembly tool, which solves the problems of large errors, low efficiency and easy occurrence of false welding in the traditional manual assembly process of microchannel serpentine tube condenser cores. It not only improves production efficiency, but also significantly improves product quality.

[0004] To solve the aforementioned technical problems, this application adopts the following technical solution:

[0005] A regular serpentine tube core assembly tool includes a support platform, a clamping mechanism disposed on the support platform, a limiting block, and a limiting post. It also includes a square tube and a U-shaped metal constraint. The limiting post and the clamping mechanism are arranged opposite to each other. The upper and lower sides of the core to be assembled are in contact with the clamping mechanism and the limiting post through the square tube, respectively. At least one of the left and right sides is limited by the limiting block. After being pressed down by the clamping mechanism, the core to be assembled is compressed and shaped. The core in the compressed and shaped state is clamped to the outside of the upper and lower two square tubes by the two ends of at least two of the metal constraint, thereby generating a constraint force to clamp the core after it rebounds.

[0006] Preferably, the metal restraint includes a U-shaped metal bracket and a metal limiting rod laterally disposed on the inner side of the corner of the metal bracket.

[0007] Preferably, the metal bracket includes a crossbar and fixed rods at both ends of the crossbar, and the crossbar, fixed rods and metal limiting rods are fixed together by welding.

[0008] Preferably, the crossbar, the fixing rod, and the metal limiting rod are all made of steel bars.

[0009] Preferably, the length of the clamping section of the fixing rod on the square tube is not greater than the height of the square tube.

[0010] Preferably, the square tube is formed by cutting C-shaped metal profiles.

[0011] Preferably, the inner side of the limiting post is provided with at least two first limiting grooves.

[0012] Preferably, the clamping mechanism includes a pressure rod arranged parallel to the limiting post and a push-pull quick clamping device provided on the support platform for moving the pressure rod back and forth. The pressure rod is provided with a plurality of second limiting grooves symmetrically arranged with the first limiting groove.

[0013] Preferably, the inner side of the pressure rod is provided with a plurality of pressing blocks protruding outward, and two pressing blocks are combined to form a second limiting groove.

[0014] Preferably, the pressure rod and the push-pull quick clamp clamp are connected by a screw.

[0015] Preferably, the support platform is provided with two push-pull quick clamps that press the pressure rod back and forth.

[0016] Preferably, the support platform is provided with a downwardly recessed storage groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] A metal constraint is used to position the microchannel serpentine condenser core and square tube, and the constraint is achieved through the reaction force required for the rigid rebound of the serpentine tube after compression. This ensures the assembly effect of the microchannel serpentine condenser core and square tube before welding, reduces the overall production cost, and improves the assembly accuracy and consistency of the microchannel serpentine condenser core, effectively eliminating errors that may occur during manual assembly. It successfully solves the problems of large errors and low efficiency in traditional manual assembly. This fixture not only improves production efficiency but also significantly enhances product quality. Attached Figure Description

[0019] Figure 1 This is a top view of the core assembly completed using assembly tools in this invention;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the metal restraint device in this invention.

[0022] Figure 4 This is a cross-sectional view of the square tube in this invention;

[0023] Figure 5 This is a schematic diagram of the pressure plate in the present invention;

[0024] In the diagram: 1. Limiting post; 2. Storage slot; 3. Support platform; 4. Square tube; 5. Clamping mechanism; 51. Push-pull quick clamp clamp; 52. Pressure rod; 53. Connecting rod; 6. Second limiting slot; 7. Core; 71. Serpentine tube; 72. Fin; 73. Side plate; 74. Manifold; 8. Limiting block; 9. Metal restraint; 91. Metal bracket; 92. Metal limiting rod; 93. Fixing rod; 94. Crossbar; 95. Guide section; 10. First limiting slot; 11. Clamping block; 30. Pressure plate; 31. Flat plate; 32. Handheld part. Detailed Implementation

[0025] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0027] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0028] Example 1:

[0029] like Figure 1As shown, a regular serpentine tube core assembly tool includes a support platform 3, a clamping mechanism 5, a limiting block 8, and a limiting post 1 disposed on the support platform 3. It also includes a square tube 4 and a U-shaped metal constraint 9. The limiting post 1 and the clamping mechanism 5 are arranged opposite to each other. The core 7 to be assembled is in contact with the clamping mechanism 5 and the limiting post 1 on its upper and lower sides through the square tube 4, respectively. At least one of the left and right sides is limited by the limiting block 8. After being pressed down by the clamping mechanism 5, the core 7 to be assembled is compressed and shaped. The core 7 in the compressed and shaped state is clamped to the outside of the upper and lower two square tubes 4 by the two ends of at least two of the metal constraint 9, thereby generating a constraint force to clamp the core 7 after it rebounds. The core 7 to be assembled includes a serpentine tube 71 with a rectangular outer contour, a collector tube 74 disposed at both ends of the serpentine tube 71, a side plate 73 located on both sides of the serpentine tube 71, and a number of fins 72 located in front of the side plate 73 and the serpentine tube 71.

[0030] The microchannel serpentine tube 71 condenser core 7 is mainly composed of two side plates 73, serpentine tube 71, two manifolds 74 and several fins 72. Before welding, the various components of the microchannel serpentine tube 71 condenser core need to be assembled to ensure stable welding operation. If there is insufficient clamping force between the heat dissipation fins 72 and the serpentine tube 71, it is easy to cause phenomena such as incomplete welding or missing welding during the welding process. Therefore, to solve this problem, a clamping mechanism was designed for assembling and positioning the microchannel serpentine tube 71 condenser core 7. During assembly, the serpentine tube 71 with the manifold 74 is first placed on the support platform 3, positioned between the clamping mechanism 5, the limiting block 8, and the limiting post 1. Then, a side plate 73 and a square tube 4 are respectively placed between the serpentine tube 71, the clamping mechanism 5, and the limiting post 1. Next, fins 72 are placed one by one into the gaps between the side plate 73 and the serpentine tube 71, and into the various gaps of the serpentine tube. Finally, the clamping mechanism 5 presses downwards, causing the upper square tube 4 to move downwards. After the two square tubes 4 are externally limited by the clamping mechanism 5 and the limiting post 1, the upper and lower sides of the core 7 are compressed and shaped by the two relatively moving square tubes 4, thus forming the serpentine shape. After the tube 71 is in a rigid compression state and is fixed by the clamping mechanism 5, the limiting block 8, and the limiting post 1, the U-shaped metal constraint 9 is inserted from top to bottom onto the outside of the upper and lower square tubes 4 of the core 7 in the compressed and shaped state. When the clamping mechanism 5 is reset, the serpentine tube 71 in the compressed state will unfold outward with its own elasticity. During the unfolding process of the serpentine tube 71, the U-shaped metal constraint 9 limits the square tubes 4 on both sides, enabling the U-shaped metal constraint 9 to generate a constraint force to clamp the core 7 and the two square tubes 4 in the elastic unfolding state, and finally complete the assembly and positioning of the core 7. This solves the problems of large errors, low efficiency, and easy occurrence of false welding in the traditional manual assembly process of the microchannel serpentine tube 71 condenser core 7, which not only improves production efficiency but also significantly improves product quality. Since the metal material of the core 7 itself is always accompanied by elastic deformation during plastic bending, the springback constraint of the serpentine tube 71 by the metal constraint 9 serves to position and assemble it, so that it will not fall off without external force during the assembly before welding. This not only constrains the product, but also effectively ensures the contact surface between the serpentine tube 71, the side plate 73 and the fins 72 during the welding process. After welding, both the square tube 4 and the metal constraint 9 can be reused, saving bundling costs. This solves the problem of material waste during the assembly process after the serpentine tube 71 core 7 is assembled and welded, making it more suitable for mass production and improving mass production efficiency and product quality.

[0031] Further improvements include, for example Figure 2As shown, the metal restraint 9 includes a U-shaped metal bracket 91 and a metal limiting rod 92 that is laterally disposed on the inner side of the corner of the metal bracket 91.

[0032] To ensure stable contact during welding of the core 7 to be assembled, it is necessary to bind and position the assembled core 7. However, conventional binding and positioning methods inevitably have several problems: First, the binding material is difficult to reuse later, increasing production costs. For example, if iron wire is used for binding, the wire is basically cut off and disposed of as scrap after welding. Second, after binding, excessive springback of the serpentine tube 71 due to operational errors can easily lead to incomplete welding and missed welding. Third, the operation is difficult and inefficient. Therefore, to solve the above technical problems, metal... The restraint device 9 consists of a U-shaped metal bracket 91 and two metal limiting rods 92 that are horizontally fixed to the inner side of the corner of the metal bracket 91. The overall structure is simpler. The metal bracket 91 is a rigid structure, which can prevent over-compression or excessive rebound from causing incomplete welding or missing welds. The whole device can withstand the welding environment without deformation, has a higher reusability, and a more stable shaping effect. The overall structure is simple and easy to operate, which effectively solves the problem of complicated operation and structure when restraining the core 7 after assembly. At the same time, it solves the problem of increased cost due to difficulty in recycling.

[0033] A further improvement is made in that the metal bracket 91 includes a crossbar 94 and fixing rods 93 at both ends of the crossbar 94. The crossbar 94, fixing rods 93 and metal limiting rods 92 are fixed together by welding. The crossbar 94, fixing rods 93 and metal limiting rods 92 are all made of steel bars.

[0034] The metal bracket 91 consists of a horizontal bar 94 and two fixed rods 93 vertically installed at both ends of the horizontal bar 94. This simpler structure provides greater stability when constraining the square tube 4. Especially when the horizontal bar 94, fixed rods 93, and metal limiting rods 92 are all made of steel reinforcement, the manufacturing cost is lower. It can be made from metal rods or steel reinforcement with a diameter of 5-8mm, or even straight metal rods, offering flexibility in material selection. Using steel reinforcement further reduces costs and makes material sourcing easier. Furthermore, the horizontal bar 94, fixed rods 93, and metal limiting rods 92 are welded together, resulting in greater strength. Compared to existing constraint devices, this structure has lower manufacturing costs, better strength, is less prone to deformation during use, has a high reusability rate, and a smaller contact area at the top during constraint. The addition of the metal limiting rod 92 allows the metal bracket 91 to position the two square tubes 4 when constraining them. When the bottom of the metal limiting rod 92 contacts the square tube 4, it ensures the metal bracket 91 remains stable after installation, preventing rotational misalignment. Furthermore, the contact between the metal limiting rod 92 and the square tube 4 creates a gap between the crossbar and the surface of the core 7, facilitating welding and effectively preventing welding difficulties caused by the crossbar 94 contacting the core 7 surface. Additionally, it eliminates the need for deliberate gap preparation, which increases operational difficulty, or the risk of the fixed rod 93 impacting the support platform 3 during operation, or the possibility of it extending downwards due to pressure during stacking, when controlling the length of the fixed rods 93 at both ends.

[0035] A further improvement is made so that the length of the clamping section of the fixing rod 93 on the square tube 4 is not greater than the height of the square tube 4.

[0036] Since the assembled cores 7 are stacked together and then transported together when welding is required, if the length of the clamping section of the fixing rod 93 on the square tube 4 is too large, it is easy for the fixing tube to bulge downwards and cause deformation to the upper surface of the lower core 7 or affect the stacking stability. Therefore, the length of the clamping section of the fixing rod 93 on the square tube 4 is not greater than the height of the square tube 4, which ensures the stability of the constraint and solves the problem caused by excessive length.

[0037] Further improvements include, for example Figure 3 As shown, the square tube 4 is formed by cutting C-shaped metal profiles.

[0038] To reduce the overall weight, the square tube 4 is cut from C-shaped metal profiles. Existing profiles can be directly cut to the required length, ensuring both high-temperature resistance and a lighter overall weight, while also solving the problem of high manufacturing costs.

[0039] Further improvements include, for example Figure 4 As shown, the inner side of the limiting post 1 is provided with at least two first limiting grooves 10.

[0040] The limiting post 1 is a rectangular metal block fixed to the support platform 3 with screws, which effectively ensures the levelness of its inner side and avoids the problem of non-plane contact surfaces when multiple limiting posts 1 are assembled to form a support. This makes the limiting effect on the square tube 4 more stable. At the same time, in order to determine the position of the metal restraint 9, at least two first limiting grooves 10 are formed on the inner side of the limiting post 1. When defining the installation position of the metal restraint 9, simply align the fixing rod 93 at one end of the metal restraint 9 with the first limiting groove 10 and insert it to quickly achieve the position of the metal restraint 9, making the entire assembly more efficient.

[0041] A further improvement is made to the clamping mechanism 5, which includes a pressure rod 52 arranged parallel to the limiting post 1 and a push-pull quick clamping device 51 provided on the support platform 3 to move the pressure rod 52 back and forth. The pressure rod 52 is provided with a plurality of second limiting grooves 6 symmetrically arranged with the first limiting groove 10.

[0042] When the core 7 is pushed down through the upper tube 4, manual operation is required, which can easily lead to errors during assembly and make it difficult to install the metal restraint 9. Therefore, a clamping mechanism 5 consisting of a pressure rod 52 and a push-pull quick clamp clamp 51 is installed on the support platform 3. When moving and limiting the upper tube 4, the push-pull quick clamp clamp 51 can be quickly pulled down to the bottom to achieve rapid, accurate, and repeated movement and positioning of the pressure rod 52, thereby bringing the square tube 4 to the required position and facilitating the assembly of the metal restraint 9. The other end of the metal restraint 9 is in the assembly type; it can be quickly assembled and limited by simply aligning it with the second limiting groove 6, which is symmetrically arranged with the first limiting groove 10. This reduces the difficulty of operation and increases assembly efficiency. When using the metal restraint 9 for limiting and restraining, operators no longer need to pull it forcefully, effectively reducing the labor intensity of operators. At the same time, it can effectively avoid errors caused by operation during assembly, ensuring that the core 7 is not partially unclamped when entering the welding process.

[0043] A further improvement is that the inner side of the pressure rod 52 is provided with a plurality of pressing blocks 11 protruding outward, and two pressing blocks 11 are combined to form a second limiting groove 6.

[0044] When the upper square tube 4 is pressed by the pressure rod 52, multiple pressing blocks 11 are used to contact the square tube 4, which can achieve targeted pressing during the operation and reduce the operation difficulty of the metal restraint device 9. In particular, when two pressing blocks 11 are combined to form a second limiting groove 6, the installation distance accuracy of the metal restraint device 9 can be guaranteed first, and the situation that one end of the metal restraint device 9 cannot be quickly inserted is avoided.

[0045] The support platform 3 is provided with two push-pull quick clamp clamps 51 that move the pressure rod 52 back and forth, and a connecting rod 53 is provided between the two push-pull quick clamp clamps 51; the pressure rod 52 and the push-pull quick clamp clamps 51 are connected by a screw.

[0046] When driving the two push-pull quick-clamp clamps 51, synchronous control is achieved by holding the connecting rod 53 between them, making operation more convenient. The clamping rod 52 is driven simultaneously by the two push-pull quick-clamp clamps 51, resulting in better stability during clamping and preventing tilting due to the rebound force that can occur with a single operation, thus improving the overall stability of the device. When clamping the core 7, differences in product size or force can easily lead to over-clamping or insufficient clamping force in certain batches or products. Therefore, the clamping rod 52 is connected to the push-pull quick-clamp clamps 51 via a screw, allowing for fine-tuning of the distance, making assembly more convenient and operation more responsive to individual preferences.

[0047] A further improvement is that the support platform 3 is provided with a downwardly recessed storage groove 2.

[0048] Since the bottom of the manifolds 74 at both ends of the serpentine tube 71 in the core 7 to be assembled is convex downwards, in order to ensure that the serpentine tube 71 is placed flat on the support platform 3, a recessed storage groove 2 is formed on the support platform 3 at the position of the manifold 74. The protruding part of the manifold 74 can be stored through the storage groove 2, so as to avoid the serpentine tube 71 being uneven when placed on the support platform 3.

[0049] Example 2:

[0050] like Figures 1-5 As shown, a method for assembling a regular serpentine tube core includes the following assembly steps:

[0051] S1. Insert the two manifolds 74 into the two ends of the serpentine tube 71 respectively, and then place them on the support platform 3, wherein one side of the serpentine tube 71 contacts and limits the movement of the limiting block 8.

[0052] S2. Place the two square tubes 4 on the upper and lower sides of the serpentine tube 71 respectively, and place the two side plates 73 between the two square tubes 4 and the serpentine tube 71 respectively.

[0053] S3. Place the fins 72 into the gaps of the serpentine tube 71 and between the serpentine tube 71 and the side plate 73, and make preliminary adjustments to the relative positions of each part.

[0054] S4. The upper tube 4 is initially pressed down by the push-pull quick clamp clamp 51 driving the pressure rod 52, so that the lower part of the serpentine tube 71 contacts and is positioned with the limiting post 1 through the lower tube 4.

[0055] S5. Tap the upper end face of the serpentine tube 71 with the pressure plate 30 to ensure that the fins 72 are installed in place;

[0056] S6. Drive the push-pull quick clamp clamp 51 again until it is locked, so that the upper and lower sides of the core 7 are clamped through the square tube 4.

[0057] S7. Align the upper end of the metal bracket 91 with the first limiting groove 10 and the second limiting groove 6, and insert it downwards until the metal limiting rod 92 contacts the upper end face of the square tube 4 to stop, thus completing the assembly.

[0058] S8, push-pull quick clamp clamp 51 resets, removes the assembled product, and proceeds to assemble the next product.

[0059] The entire operation is simple and convenient. During mass assembly, the microchannel serpentine tube 71 condenser will not experience issues such as missed welds or weak welds in subsequent welding processes due to manual assembly, thus making production faster and more efficient. In particular, the readjustment after initial clamping makes it easy to determine whether the heat dissipation fins 72 are installed correctly. If local warping occurs, it can be backpressed to ensure that the heat dissipation fins 72 do not warp again after backpressing, effectively avoiding weak welds or missed welds on both sides of the fins 72 and ensuring the accuracy of the welding position. At the same time, tapping with the pressure plate 30 to make the bottom of the fins 72 contact the support platform 3 can achieve rapid repositioning over a large area, effectively solving the problem of manual... The problem of low efficiency and cumbersome operation associated with manual pressing is addressed. After confirming that all heat dissipation fins 72 are installed in place, the push-pull quick clamp clamp 51 is driven again until it is locked, facilitating the rapid assembly of the metal restraint 9. Since more than two metal restraints 9 are used, the assembled products can be stacked to achieve greater flatness and prevent loosening during movement. After welding, both the metal restraint 9 and the square tube 4 can be disassembled and reused, effectively solving the problem of component waste, reducing production costs, improving welding efficiency, and enabling continuous mass production of the welding process. The entire operation is less prone to errors due to operational reasons.

[0060] A further improvement is that the lower end of the fixing rod 93 is provided with an outwardly inclined or bent guide section 95, and the length of the outer ends of the two square tubes 4 under the pressing state by the push-pull quick clamp clamp 51 is basically the same as the clamping length of the metal constraint 9, with a tolerance of ±1mm between the two.

[0061] The lower end of the fixing rod 93 is provided with an outwardly inclined or bent guide section 95, which can reduce the compression distance of the core 7, making it less likely for the core 7 to be over-compressed and deformed. The smaller the compression distance of the core 7, the better the overall stability of the core 7. In particular, the fins 72, which are S-shaped structures, are prone to deformation and failure to return to their original position under pressure, resulting in issues such as incomplete soldering and missing solder joints. To ensure a smaller compression distance of the core 7, it is generally adjusted so that the two fins are clamped by the push-pull quick clamp clamp 51. The outer length of the square tube 4 is basically the same as the clamping length of the metal restraint 9. This state can easily increase the difficulty of installing the metal restraint 9. Therefore, a guide section 95 with an outward tilt or bend of about 5 mm is formed at the lower end of the fixing rod 93. During assembly, it can make the device easier to insert. Even if the tolerance between the two is positive, during the insertion process, it is only necessary to tap the metal restraint 9 with a block to complete the assembly. This can better prevent the fins 72 from deforming due to excessive extrusion.

[0062] Example 3:

[0063] like Figure 5 As shown, the pressure plate 30 includes a plastic or rubber flat plate 31 with a length and width greater than the serpentine tube 71, and a hand-held part 32 provided on the flat plate 31.

[0064] When the heat dissipation fins 72 are pressed by the pressure plate 30, the length and width of the pressure plate 30 are larger than the serpentine tube 71, which can quickly return all the heat dissipation fins 72 to their positions, resulting in higher operating efficiency. Moreover, the flat plate 31 is made of plastic or rubber materials, which can ensure flatness and reduce the overall weight. In particular, when rubber is used, it also has a certain degree of elasticity, so even if there is a local dent, it will not affect the operation. The handle 32 is a cylindrical roller structure.

[0065] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A regular serpentine die assembly tool characterized by: The assembly includes a support platform (3), a clamping mechanism (5) mounted on the support platform (3), a limiting block (8), and a limiting post (1). The support platform (3) has a recessed storage groove (2). The assembly also includes a square tube (4) and a U-shaped metal restraint (9). The limiting post (1) and the clamping mechanism (5) are arranged opposite to each other. The core (7) to be assembled is in contact with the clamping mechanism (5) and the limiting post (1) on the upper and lower sides through the square tube (4), respectively. At least one side of the left and right sides is limited by the limiting block (8). After being pressed down by the clamping mechanism (5), the core (7) to be assembled is compressed and shaped. The core (7) in the compressed and shaped state is clamped to the outside of the upper and lower square tubes (4) by the two ends of at least two metal restraints (9), thereby generating a restraining force to clamp the core (7) after it rebounds.

2. A regular serpentine tube core assembly tool according to claim 1, characterized in that: The metal restraint (9) includes a U-shaped metal bracket (91) and a metal limiting rod (92) arranged laterally on the inner side of the corner of the metal bracket (91).

3. A regular serpentine core assembly tool according to claim 2, characterized in that: The metal bracket (91) includes a crossbar (94) and fixing rods (93) at both ends of the crossbar (94). The crossbar (94), fixing rods (93) and metal limiting rods (92) are fixed together by welding.

4. A regular serpentine tube core assembly tool according to claim 3, characterized in that: The crossbar (94), the fixing rod (93) and the metal limiting rod (92) are all made of steel bars, and the lower end of the fixing rod (93) is provided with an outwardly inclined or bent guide section (95).

5. A regular serpentine core assembly tool according to claim 4, characterized in that: The length of the clamping section of the fixing rod (93) on the square tube (4) is not greater than the height of the square tube (4).

6. A regular serpentine tube core assembly tool according to claim 4, characterized in that: The inner side of the limiting post (1) is provided with at least two first limiting grooves (10).

7. A regular serpentine tube core assembly tool according to claim 6, characterized in that: The clamping mechanism (5) includes a pressure rod (52) arranged parallel to the limiting post (1) and a push-pull quick clamp clamp (51) provided on the support platform (3) to move the pressure rod (52) back and forth. The pressure rod (52) is provided with a plurality of second limiting grooves (6) symmetrically arranged with the first limiting groove (10).

8. A regular serpentine tube core assembly tool according to claim 7, characterized in that: The inner side of the pressure rod (52) is provided with a plurality of pressing blocks (11) protruding outward, and two pressing blocks (11) are combined to form a second limiting groove (6).

9. A regular serpentine tube core assembly tool according to claim 8, characterized in that: The pressure rod (52) is connected to the push-pull quick clamp clamp (51) by a screw.

10. A regular serpentine tube core assembly tool according to claim 7, characterized in that: The support platform (3) is provided with two push-pull quick clamp clamps (51) that move the pressure rod (52) back and forth, and a connecting rod (53) is provided between the two push-pull quick clamp clamps (51).

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