Positioning and welding equipment for heat exchanger assembly

Abstract

The invention relates to the technical field of laser cutting and welding, and discloses heat exchanger assembly positioning and welding equipment which comprises a cutting support, a cylinder frame and a flange frame are arranged on the cutting support and provided with a fixing part a and a fixing part b respectively, and the fixing part a and the fixing part b are used for fixing a to-be-machined cylinder and a to-be-machined flange assembly respectively. By setting the preset distance between the fixing ring and the positioning piece and combining with the slidable iris piece structure, each barrel can be axially positioned in a standardized mode before being cut, and therefore it is guaranteed that the lengths of cut parts are kept consistent. According to the structure, the problems that in the prior art, the laser trimming cutting length depends on manual judgment, errors are large, and repeatability is poor are effectively solved, and interface uniformity and follow-up welding consistency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting and welding, and particularly relates to a positioning welding device for heat exchanger components. Background Art

[0002] Heat exchangers are widely used in industrial fields such as petrochemical, electric power, metallurgy, and food processing. Their components usually consist of a cylinder body, a tube sheet, a flange, and internal heat exchange elements. During the manufacturing process of heat exchangers, as a key component for sealed connection and pressure bearing, the welding quality of the flange with parts such as the cylinder body and the head directly affects the sealing performance and structural strength of the equipment.

[0003] Currently, in the welding operation of heat exchanger flanges, due to burrs, thermal deformation, or local concavities and convexities often accompanying the cutting or blanking process at the end of the cylinder body, the welding interface has unevenness problems. Such uneven interfaces are extremely likely to cause defects such as lack of fusion, slag inclusion, and weld bead during welding, seriously affecting the weld formation quality and the overall service life of the heat exchanger.

[0004] To improve the welding quality of the interface, the industrial laser cutting process is often used to trim and cut the interface part to remove deformed or irregular areas, making the interface reach good flatness. However, during the existing laser trimming and cutting process, the control of the cutting length generally relies on manual judgment or rough positioning, lacking a unified measurement and positioning mechanism, resulting in inconsistent cutting lengths for each cylinder body. Such differences in the cut lengths not only affect the consistency of subsequent welding interfaces but may also lead to different component sizes and large assembly errors, affecting the structural stability of the whole machine and the standardized manufacturing process.

[0005] Therefore, how to accurately control the cutting length of the interface during laser cutting and trimming to ensure consistent edge dimensions of each welding component and a flat and unified interface is a key technical problem that urgently needs to be solved in the field of heat exchanger manufacturing. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a positioning welding device for heat exchanger components, aiming to alleviate the above problems to at least a certain extent.

[0007] The above technical object of the present invention is achieved through the following technical solutions: A positioning welding device for heat exchanger components includes a cutting bracket. A cylinder body frame and a flange frame are provided on the cutting bracket, and they respectively have a fixing part a and a fixing part b for fixing the cylinder body and the flange component to be processed. A fixing ring is provided between the cylinder body frame and the flange frame, and a rotating ring is provided on one side of the fixing ring; It also includes a plurality of iris pieces, which are slidably connected to the rotating ring and form a positioning opening around the center. The rotating ring drives the iris pieces to slide during rotation, thereby adjusting the diameter of the positioning opening. A positioning piece is provided on the other side of the fixed ring; It also includes a positioning component provided between the flange frame and the rotating ring, which is used to drive the flange frame to perform three-stage moving operations and control the rotation behavior of the rotating ring; A driven component provided between the flange frame and the cylinder body frame, which is used to synchronously drive the cylinder body frame to move when the flange frame executes a specific moving section; A cutting and welding component provided on the fixed ring, which is used to perform laser cutting of the end of the cylinder body and laser welding of the flange assembly.

[0008] Preferably, the fixing part a includes a connecting ring a connected inside the cylinder body frame. A plurality of cylinders a are connected to the outer wall of the connecting ring a. The telescopic shaft of the cylinder a extends into the connecting ring a and is connected with a positioning block a.

[0009] Preferably, the fixing part b includes a connecting ring b connected inside the flange frame. A plurality of cylinders b are connected to the outer wall of the connecting ring b. The cylinders b extend into the connecting ring b and are connected with a plurality of positioning blocks b. The length of the positioning block b is greater than the width of the connecting ring b and extends to one side of the connecting ring b.

[0010] Preferably, the positioning component includes an oil cylinder connected to the cutting bracket, and the telescopic shaft of the oil cylinder is connected with the flange frame.

[0011] Preferably, a limiting ring is connected to one side of the fixed ring. A connecting strip slidably connected with the limiting ring is connected to the outer wall of the rotating ring. An arc-shaped opening is formed in the side wall of the rotating ring, and a linear opening is formed in one side of the fixed ring. A boss a slidably matched with the arc-shaped opening is connected to one side of the iris piece, and a boss b slidably matched with the linear opening is connected to the other side.

[0012] Preferably, the positioning component includes a structure for sequentially driving the flange frame to perform three-stage movements along a predetermined direction: The first-stage movement includes: The first sub-stage, driving the flange frame to move a first preset distance to make the rotating ring rotate and increase the diameter of the positioning opening; The second sub-stage, driving the flange frame to continue moving a second preset distance, driving the cylinder body frame to move through the driven component, inserting the end of the cylinder body into the positioning opening, and making the positioning opening clamp and fit the end of the cylinder body; The second-stage movement includes: The positioning component drives the rotating ring to rotate, increasing the diameter of the positioning opening, relaxing and releasing the clamping restraint on the end of the cylinder body; The third-stage movement includes: The flange frame moves further, bringing the flange assembly closer to and into contact with the end of the cylinder body; A rotating shaft is rotatably connected to the cutting support. A guiding cylinder a is connected to the rotating shaft. A spiral section a is provided on the guiding cylinder a. A straight section a is provided at the end of the spiral section a. A guiding column is connected to the cutting support. A spring a is connected between the rotating ring and the limiting ring. One end of the rotating shaft is connected to a gear a. A rack a meshing with the gear a is connected to the outer wall of the rotating ring; The driven component includes a rack b connected to the flange frame, a rack c connected to the cylinder body frame, and a gear b rotatably connected to the cutting support, which is adapted to the rack b and meshes with the rack c.

[0013] Preferably, a guiding cylinder b is further connected to the rotating shaft. An inclined opening is provided at one end of the guiding cylinder b facing the guiding cylinder a. There is a spacing between the guiding cylinder b and the guiding cylinder a. A spiral section b is provided on the guiding cylinder b. A straight section b is provided at the end of the spiral section b.

[0014] Preferably, a positioning strip is connected to the cutting support for restricting the initial position of the cylinder body frame.

[0015] Preferably, a connection opening is provided on one side of the fixed ring. A connecting rod passing through the connection opening is connected to one side of the iris piece. A link slidingly connected to the connecting rod is connected to one side of the positioning piece. A spring b is connected between the link and the connection strip.

[0016] Preferably, the cutting and welding component includes a sleeve ring connected to the fixed ring. A gear c is connected inside the sleeve ring. A laser cutting head and a laser welding head are connected to the inner wall of the gear c. A motor is connected to the fixed ring. A gear d meshing with the gear c is connected to the driving shaft of the motor. In summary, the present invention mainly has the following beneficial effects: By setting a preset spacing between the fixed ring and the positioning piece and combining with the slidable iris piece structure, the present invention enables standardized axial positioning of each cylinder body before cutting, thereby ensuring that the length of the cut-off part remains consistent. This structure effectively solves the problems in the prior art that the laser trimming cutting length depends on manual judgment, has large errors and poor repeatability, and improves the interface uniformity and the consistency of subsequent welding.

[0017] During the cutting process, the iris piece is in a clamped state, capable of forming a circumferential support for the end of the cylinder body. Especially at the moment when the cutting is nearly completed, it provides effective restraint for the cut-off corner materials, preventing phenomena such as tearing, edge chipping, or splashing caused by their falling due to gravity, further ensuring the perpendicularity and flatness of the laser cut, and improving the cutting quality and operation safety.

[0018] After the cutting is completed, the position of the cylinder body remains unchanged, and there is no need for repositioning or movement adjustment. The flange frame can continue to move to achieve the axial docking of the flange assembly and the end of the cylinder body. Since the flange assembly moves forward along the guiding path and the end of the cylinder body has been cut with high precision, the two can directly complete coaxial fitting without manual calibration, thus simplifying the welding preparation process, avoiding error accumulation, and improving the forming quality and reliability of the welding interface.

[0019] The structural cooperation scheme provided by the present invention not only improves the processing accuracy and repeatability but also greatly reduces the need for manual intervention, is applicable to high-tempo automated laser cutting and welding processes, and helps to promote the development of related equipment towards standardization, modularization, and automation. Brief Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is another schematic diagram of the overall structure of the present invention; Figure 3 is the structural schematic diagram of the fixing part a of the present invention; Figure 4 is the structural schematic diagram of the fixing part b of the present invention; Figure 5 is the structural schematic diagram of the positioning opening of the present invention; Figure 6 is the structural schematic diagram of the iris piece of the present invention; Figure 7 is another schematic diagram of the structure of the iris piece of the present invention; Figure 8 is the structural schematic diagram of the collar of the present invention; Figure 9 is the structural schematic diagram of the guiding cylinder a and the guiding cylinder b of the present invention.

[0021] Reference Signs: 100, cutting support; 101, cylinder body frame; 102, flange frame; 103, fixing part a; 104, fixing part b; 105, fixing ring; 106, rotating ring; 107, iris piece; 108, positioning opening; 109, magnetic strip; 110, positioning piece; 200, connecting ring a; 201, cylinder a; 202, positioning block a; 203, connecting ring b; 204, cylinder b; 205, positioning block b; 206, oil cylinder; 300. Limit ring; 301. Connecting bar; 302. Arc-shaped opening; 303. Linear opening; 304. Boss a; 305. Boss b; 400. Rotating shaft; 401. Guide cylinder a; 402. Spiral section a; 403. Straight section a; 404. Guide post; 405. Spring a; 406. Gear a; 407. Rack a; 408. Guide cylinder b; 409. Oblique opening; 410. Spiral section b; 411. Straight section b; 412. Positioning bar; 413. Rack b; 414. Rack c; 415. Gear b; 500. Connecting opening; 501. Connecting rod; 502. Link rod; 503. Spring b; 600. Collar; 601. Gear c; 602. Laser cutting head; 603. Laser welding head; 604. Motor; 605. Gear d. Detailed implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Reference Figures 1-9 , a positioning and welding device for a heat exchanger assembly, including a cutting bracket 100, which serves as the installation and support base for the overall structure.

[0024] A cylinder frame 101 and a flange frame 102 are provided on the cutting bracket 100. The two respectively have a fixing part a 103 and a fixing part b 104, which are respectively used to fix the cylinder and the flange assembly to be processed.

[0025] A fixing ring 105 is arranged between the cylinder frame 101 and the flange frame 102, which is used to form the positioning reference for the end of the cylinder. A rotating ring 106 is provided on one side of the fixing ring 105, and the rotating ring 106 can rotate axially around the fixing ring 105.

[0026] A plurality of iris pieces 107 are connected to the rotating ring 106 in a slidable manner, and a positioning opening 108 is formed around the center. The rotating ring 106 drives the iris pieces 107 to slide during rotation, so as to adjust the diameter of the positioning opening 108 to adapt to cylinders of different diameters. A magnetic strip 109 is provided on the iris piece 107.

[0027] On the other side of the fixed ring 105, a positioning piece 110 is provided, which is connected to a plurality of iris pieces 107 and is used to define the initial position when the cylinder body is fixed by the fixed part a103. Moreover, a preset distance is provided between the positioning piece 110 and the fixed ring 105 to ensure that the lengths of the cutting ends are consistent.

[0028] A positioning component is arranged between the flange frame 102 and the rotating ring 106. This positioning component is used to drive the flange frame 102 to perform a three-stage moving operation and control the rotation behavior of the rotating ring 106.

[0029] A driven component is arranged between the flange frame 102 and the cylinder body frame 101 and is used to synchronously drive the cylinder body frame 101 to move when the flange frame 102 executes a specific moving section, so as to realize the automatic positioning action of the cylinder body.

[0030] In addition, a cutting and welding component is arranged on the fixed ring 105, and its structure is close to the positioning opening 108 area and is used to perform the laser cutting of the cylinder body end and the laser welding process on the flange assembly.

[0031] Among them, the positioning component includes a structure for sequentially driving the flange frame 102 to move in three sections along a predetermined direction: The first-stage movement includes: The first sub-section drives the flange frame 102 to move a first preset distance to make the rotating ring 106 rotate and increase the diameter of the positioning opening 108. The second sub-section drives the flange frame 102 to continue to move a second preset distance, drives the cylinder body frame 101 to move through the driven component, inserts the end of the cylinder body into the positioning opening 108, and makes the positioning opening 108 clamp and fit the end of the cylinder body. The second-stage movement includes: The positioning component drives the rotating ring 106 to rotate, increases the diameter of the positioning opening 108, and relaxes and releases the clamping constraint on the end of the cylinder body. The third-stage movement includes: The flange frame 102 further moves to make the flange assembly approach and contact the end of the cylinder body.

[0032] Through the above settings, first, the cylinder body to be processed and the flange assembly are respectively installed in the cylinder body frame 101 and the flange frame 102, and are fixed by the fixed part a103 in the cylinder body frame 101 and the fixed part b104 in the flange frame 102 to ensure that their axial positions remain unchanged during the subsequent movement. At this time, the end of the cylinder body faces the fixed ring 105 between them and contacts the positioning piece 110 thereon.

[0033] After the clamping of the cylinder body and the flange assembly is completed, the positioning component is activated, and the flange frame 102 starts to move towards the fixed ring 105, entering the first sub-stage of the first-stage movement. In this stage, the movement of the flange frame 102 drives the rotation of the rotating ring 106, and the rotating ring 106 drives multiple iris plates 107 to slide, thereby increasing the diameter of the positioning opening 108 formed by surrounding the iris plates 107, providing sufficient space for the insertion of the end of the cylinder body. When the iris plates 107 move, they can also drive the positioning plates 110 connected to them to move, so as to avoid the movement of the subsequent cylinder body and provide sufficient space for the movement of the cylinder body. As the flange frame 102 continues to move, it enters the second sub-stage of the first-stage movement. At this time, the driven component arranged between the flange frame 102 and the cylinder frame 101 is used to drive the cylinder frame 101 to move synchronously, so that the end of the cylinder body is inserted into the positioning opening 108. This position is the positioning depth. Then, the iris plates 107 are reset, and the positioning opening 108 formed between the multiple iris plates 107 shrinks to fit and clamp the outer wall of the cylinder body, realizing precise positioning. Since there is a preset distance between the positioning plate 110 and the fixed ring 105, this structure ensures that the end lengths of all cylinder bodies are the same during cutting, solving the problem of inconsistent cutting lengths caused by manual positioning in the prior art.

[0034] After the positioning of the cylinder body is completed, the positioned cylinder body can be laser cut by the cutting and welding component, and the original end of the cylinder body is smoothly cut off according to the preset cutting plane. When the cylinder body is positioned and fixed by the fixing part a103, the end of the cylinder body contacts the positioning plate 110, and the movement of the cylinder body is limited by the preset distance between the positioning plate 110 and the iris plates 107, so as to ensure that the cutting lengths of all cylinder body ends are consistent.

[0035] During the laser cutting process, the cut-off part is the surplus material part on the side of the end of the cylinder body facing the flange frame 102, that is, the scrap. This scrap usually has irregular end face deformation caused by previous blanking or transportation. If it is directly used for welding, it will seriously affect the joint quality. Through the above cutting operation, this unusable end part is accurately removed, so that the remaining part of the cylinder body forms a flat and perpendicular welding reference surface.

[0036] In addition, during the cutting process, the iris plates 107 are in a clamping state and continuously form a circumferential enclosure around the outer wall of the end of the cylinder body. Since laser cutting divides the cylinder body into a cut-off section and a retained section, when the cutting is about to be completed, if there is no support, the cut-off scrap section is likely to suddenly fall due to its own weight, causing the cutting seam to tear, the residue to fly, and even damaging the main material. Through the structural constraint of the iris plates 107 on the cut-off end, it can effectively prevent it from falling or shaking, ensuring that the cutting seam is always uniform and the cross section is smooth during the laser cutting process, thereby further improving the cutting quality and operation safety.

[0037] After the laser cutting is completed, the positioning component continues to drive and enters the second moving stage. In this stage, the positioning component controls the rotation of the rotating ring 106, causing the multiple iris pieces 107 to retreat outward along the sliding track, and the diameter of the positioning opening 108 increases accordingly, thereby relaxing and releasing the clamping constraint on the scrap. At this time, the cylinder body is still axially stabilized by the fixing part a103, but its radial direction is no longer restricted by the iris pieces 107, providing spatial conditions for the further approach and docking of the flange assembly. The cut scrap is separated from the cylinder body main body, and the scrap has lost its structural constraint, so the operator can take out the scrap to avoid affecting the subsequent laser welding work.

[0038] Next, as the flange frame 102 continues to move forward, the positioning component enters the third moving stage. The flange frame 102 continues to move towards the fixing ring 105. Under the constraint of the fixing part b104, the flange assembly gradually approaches and finally achieves axial docking with the end face of the cylinder body that has completed the end cutting. Since the end of the cylinder body has completed high-precision laser cutting, ensuring its perpendicularity and flatness, a good fitting state can be achieved during the docking process, avoiding problems such as uneven weld gaps or welding stress concentration.

[0039] Since the cylinder body is always positioned and its position remains unchanged by the fixing part a103 during the laser cutting stage, the entire cutting process and after cutting do not involve repositioning or repositioning operations of the cylinder body. Therefore, after the scrap is removed and the clamping of the iris pieces 107 is released, the continuous movement of the flange frame 102 can directly drive the flange assembly to move axially towards the end of the cylinder body and finally achieve end face docking. At this time, since the end face of the cylinder body has obtained uniform flatness and perpendicularity through laser cutting, and the flange assembly is advanced along the preset guiding path to the contact position, the docking surfaces of the two are automatically in a coaxial fitting state, and welding operations can be directly carried out without the need for additional optical positioning, visual recognition, or manual auxiliary adjustment. The advantage of this combination of structure and process is that during the welding stage, there is no need to reposition or correct the welding position between the cylinder body and the flange assembly, significantly simplifying the welding preparation process, improving the repeatability of the positioning accuracy and the consistency of the welding operation, effectively reducing the equipment complexity and manual dependence, and is particularly suitable for automated and batch production scenarios.

[0040] The present invention realizes precise control and unified positioning of the cutting length of the end of the cylinder body by setting the preset distance between the fixing ring 105 and the positioning piece 110 and combining the adjustable clamping structure of the iris pieces 107. During the cutting process, the iris pieces 107 form a structural constraint on the cut end to prevent it from dropping or shifting, ensuring smooth cutting and a perpendicular end face. After cutting, the position of the cylinder body remains unchanged, and the flange assembly can be directly docked without repositioning and then enter the welding process, significantly improving the consistency, accuracy, and standardization of the welding interface, and solving the problems of large manual positioning errors and component assembly deviations in the prior art.

[0041] As a further solution of the present invention, the fixing part a103 includes a connecting ring a200 connected inside the cylinder frame 101. A plurality of cylinders a201 are connected to the outer wall of the connecting ring a200. The telescopic shaft of the cylinder a201 extends into the connecting ring a200 and is connected with a positioning block a202; Through the above arrangement, after the cylinder is installed into the cylinder frame 101, the connecting ring a200 located inside the cylinder frame 101 can serve as a fixed base to provide circumferential support. A plurality of cylinders a201 connected to the outer wall of the connecting ring a200 act synchronously after receiving a control signal. Their telescopic shafts extend radially inward and drive the positioning blocks a202 to approach the outer wall of the cylinder.

[0042] When the positioning block a202 contacts the outer wall of the cylinder, the cylinder a201 continues to act to form a radial clamping force, so that the cylinder is evenly supported and fixed by a plurality of positioning blocks a202 inside the connecting ring a200. Since the positioning blocks a202 are distributed along the circumferential direction and are active telescopic structures, they can adapt to the outer walls of cylinders with different diameters, effectively preventing the cylinder from axially or radially shifting during subsequent cutting and docking processes.

[0043] As a further solution of the present invention, the fixing part b104 includes a connecting ring b203 connected inside the flange frame 102. A plurality of cylinders b204 are connected to the outer wall of the connecting ring b203. The cylinders b204 extend into the connecting ring b203 and are connected with a plurality of positioning blocks b205. The length of the positioning block b205 is greater than the width of the connecting ring b203 and extends to one side of the connecting ring b203; Through the above arrangement, after the flange assembly is placed inside the flange frame 102, the connecting ring b203 arranged inside the flange frame 102 serves as a positioning reference ring and can provide a stable support structure for the flange assembly. After the plurality of cylinders b204 connected to the outer wall of the connecting ring b203 execute the control instruction, their telescopic shafts drive the connected positioning blocks b205 to move radially inward, so that the positioning blocks b205 extend into the inner area of the connecting ring b203 and contact the outer wall of the flange assembly.

[0044] Since the length of the positioning block b205 is greater than the width of the connecting ring b203 and extends to one side of the connecting ring b203, the end of the positioning block b205 can extend out of the inner boundary of the connecting ring b203 while clamping the flange assembly. This structural design ensures that the flange assembly still has sufficient insertion force in the clamped state and can smoothly pass through the positioning opening 108 formed by the iris piece 107 to achieve axial plug-in docking with the end face of the cylinder.

[0045] This structure not only satisfies the stable positioning of the flange assembly, but also does not affect the insertion stroke of the flange due to the interference of the positioning mechanism, thus ensuring the smooth coaxial docking and welding cooperation between the flange assembly and the cylinder body.

[0046] As a further solution of the present invention, the positioning member includes an oil cylinder 206 connected to the cutting bracket 100, and the telescopic shaft of the oil cylinder 206 is connected to the flange frame 102; Through the above settings, the oil cylinder 206 can directly drive the flange frame 102 to move back and forth in the axial direction. During the telescopic process of the oil cylinder 206, the flange frame 102 realizes accurate and controllable linear displacement, providing a power basis for the flange assembly.

[0047] As a further solution of the present invention, a limiting ring 300 is connected to one side of the fixed ring 105, a connecting strip 301 slidably connected to the limiting ring 300 is connected to the outer wall of the rotating ring 106, an arc-shaped opening 302 is formed in the side wall of the rotating ring 106, a linear opening 303 is formed in one side of the fixed ring 105, a convex platform a304 slidably engaged with the arc-shaped opening 302 is connected to one side of the iris piece 107, and a convex platform b305 slidably engaged with the linear opening 303 is connected to the other side; Through the above settings, the limiting ring 300 and the rotating ring 106 are slidably engaged through the connecting strip 301, so that the rotating ring 106 can be controlled to rotate in the circumferential direction on one side of the fixed ring 105. At the same time, the arc-shaped opening 302 provided on the side wall of the rotating ring 106 and the linear opening 303 provided on the fixed ring 105 respectively provide moving guide rails for the iris pieces 107. One end of each iris piece 107 is inserted into the arc-shaped opening 302 through the convex platform a304, and the other end is inserted into the linear opening 303 through the convex platform b305.

[0048] When the rotating ring 106 rotates under the constraint of the limiting ring 300, since the arc-shaped opening 302 is a curved track and the linear opening 303 is in a fixed direction, the iris pieces 107 are forced to slide radially under the guiding action of the convex platforms at both ends, thereby realizing the synchronous inward contraction or outward expansion of multiple iris pieces 107. This structure forms forced guiding sliding through the difference in the geometric trajectories of the openings, ensuring that all iris pieces 107 move consistently and controllably, being able to stably adjust the diameter of the positioning opening 108, adapt to the positioning requirements of cylinders of different sizes, and ensure the synchronism and stability of the clamping process.

[0049] As a further solution of the present invention, the positioning component further includes a rotating shaft 400 rotatably connected to the cutting support 100. A guiding cylinder a401 is connected to the rotating shaft 400. A spiral section a402 is provided on the guiding cylinder a401. A straight section a403 is provided at the end of the spiral section a402. A guide post 404 is connected to the cutting support 100. A spring a405 is connected between the rotating ring 106 and the limiting ring 300. One end of the rotating shaft 400 is connected to a gear a406. A rack a407 meshing with the gear a406 is connected to the outer wall of the rotating ring 106; The driven component includes a rack b413 connected to the flange frame 102. A rack c414 is connected to the cylinder body frame 101. A gear b415 adapted to the rack b413 and meshing with the rack c414 is rotatably connected to the cutting support 100; With the above settings, when the positioning component is activated, the flange frame 102 starts to move towards the fixed ring 105, entering the first stage of movement. In the first sub-stage, the linear movement of the flange frame 102 drives the guide post 404 connected thereto to move forward step by step, and the guide post 404 gradually enters the spiral section a402 inside the guiding cylinder a401 connected to the rotating shaft 400.

[0050] The spiral section a402 is an arranged spiral track. During the movement of the guide post 404 inside it, while advancing axially, it also forces the guiding cylinder a401 to rotate, thereby driving the rotating shaft 400 to rotate synchronously. When the rotating shaft 400 rotates, the gear a406 connected to one end thereof rotates accordingly. The gear a406 meshes with the rack a407 connected to the outer wall of the rotating ring 106, thereby driving the rotating ring 106 to rotate circumferentially, enabling the plurality of iris pieces 107 to slide synchronously with the positioning piece 110, increasing the diameter of the positioning opening 108, and providing sufficient space for the subsequent insertion of the end of the cylinder body. At this time, although the rack b413 moves along, the teeth on the rack b413 have not yet meshed with the gear b415, that is, the current cylinder body frame 101 remains in place, so as to avoid the problem of movement interference caused by the cylinder body frame 101 moving and touching the positioning piece 110 before the positioning piece 110 moves out of the movement path of the cylinder body.

[0051] When the guide post 404 enters the straight section a403 in the guide cylinder a401 from the end of the spiral section a402, the flange frame 102 continues to move linearly. This process is the second sub-section of the first-stage movement. Since the straight section a403 no longer has a spiral guiding effect, the rotating shaft 400 stops rotating, and the rotating ring 106 maintains its current open state. During this process, since the iris pieces 107 have been opened in the first sub-section to form a positioning opening 108 with a sufficient diameter, when the guide post 404 leaves the spiral section a402 and enters the straight section a403, the rack b413 meshes with the gear b415. When the guide post 404 continues to move, it can move the cylinder frame 101 through the rack b413, gear b415, and rack c414, so that the cylinder end fixed on the cylinder frame 101 is slowly pushed axially and gradually inserted into the positioning opening 108 formed by the iris pieces 107.

[0052] When the end of the cylinder reaches the positioning opening 108, the guide post 404 also leaves the straight section a403 in the guide cylinder a401, and the tooth block on the rack b413 synchronously disengages from the meshing relationship with the gear b415. The cylinder frame 101 then stops moving forward, completing the insertion action.

[0053] At this time, since the rotating shaft 400 is no longer forced to rotate by the guide post 404, the spring a405 connected between the rotating ring 106 and the limit ring 300 begins to release the pre-stored elastic potential energy, pushing the rotating ring 106 to automatically rotate in the opposite direction. As the rotating ring 106 rotates, the multiple iris pieces 107 connected to it slide synchronously along the guiding track, and the diameter of the positioning opening 108 gradually decreases until the inner edges of the iris pieces 107 are in contact with the outer wall of the cylinder end, forming a stable circumferential clamping state.

[0054] As a further solution of the present invention, a guide cylinder b408 is also connected to the rotating shaft 400. One end of the guide cylinder b408 facing the guide cylinder a401 is provided with an inclined opening 409. There is a spacing between the guide cylinder b408 and the guide cylinder a401. The guide cylinder b408 is provided with a spiral section b410, and the end of the spiral section b410 is provided with a straight section b411; With the above settings, when the flange frame 102 continues to move forward and enters the second stage of movement, after the guide post 404 disengages from the straight section a403 of the guide cylinder a401, it gradually enters the spiral section b410 of the guide cylinder b408 under the guidance of the inclined opening 409. When the guide post 404 moves within the spiral section b410, it can drive the guide cylinder b408 to rotate again and synchronously drive the rotating shaft 400 to rotate. When the rotating shaft 400 rotates, the gear a406 connected to one end thereof rotates accordingly, driving the rack a407 engaged with it to move, thereby causing the rotating ring 106 to rotate again in the circumferential direction. At this time, the rotating ring 106 drives the iris piece 107 to slide synchronously, and the diameter of the positioning opening 108 gradually increases, thereby relaxing and releasing the previous circumferential clamping constraint on the end of the cylinder body, making the outer wall of the cylinder body in a state of no radial interference, and providing sufficient space for the further insertion of the flange assembly. After entering the third stage of movement, the guide post 404 continues to move forward and enters the straight section b411 inside the guide cylinder b408. Since the straight section b411 is a straight track and no longer applies rotational drive to the rotating shaft 400, at this time the rotating shaft 400 remains stationary, the rotating ring 106 no longer moves, and the iris piece 107 maintains the current open state. At the same time, the flange frame 102 continues to advance towards the fixed ring 105, driving the flange assembly to move forward along the axis until the end face of the flange assembly is in butt joint with the end of the cylinder body that has been cut. Since the end face of the cylinder body has been cut flat and its position has not changed, the advancing path of the flange assembly is guided by the flange frame 102, and finally natural butt joint and coaxial fitting can be achieved, providing a good connection basis for subsequent laser welding.

[0055] In addition, the inclined opening 409 is provided at one end of the guide cylinder b408 facing the guide cylinder a401. Usually, it is an opening section formed by cutting along the wall of the guide cylinder b408. Its structure is an inclined guiding surface, forming a certain angle with the movement path of the guide post 404, so that the guide post 404 can smoothly slide into the inside of the guide cylinder b408 during the guiding transition.

[0056] In the structural layout, due to the possible different diameters of the "cylinder body", after the flange frame 102 completes the first stage of movement, the positioning opening 108 is reduced to a diameter adapted to the cylinder body. At this time, the rotating ring 106 has rotated back to a certain angle, and there is an axial distance between the guide cylinder a401 and the guide cylinder b408. Without the guidance of the inclined opening 409, after the guide post 404 exits from the straight section a403 of the guide cylinder a401, it is easy to have problems such as misalignment with the guide cylinder b408 and hitting the cylinder wall. The setting of the inclined opening 409 is precisely to solve the problem of the seamless transition of the guide post 404 from the guide cylinder a401 to the guide cylinder b408.

[0057] During the process of the guide post 404 touching the inclined opening 409, if there is a slight angular deviation of the rotating ring 106, it may cause the positioning opening 108 to further shrink or expand according to a predetermined trend. During this process, if the positioning opening 108 temporarily shrinks, it will exert a certain pressing effect on the scrap material located in the clamping area. However, since the width of this section of scrap material is relatively narrow and its structural flexibility is relatively high, it will not pose a substantial obstacle to the further advancement of the guide post 404. At the same time, the movement of the flange frame 102 and the guide post 404 is driven by a rigid structure and has sufficient linear propulsion force to overcome the local deformation or pressing reaction force of the scrap material and ensure the guide post 404 continues to advance stably along the axis.

[0058] Therefore, regardless of whether the guide post 404 causes a deflection change of the rotating ring 106 during the process of touching the inclined opening 409, it can still smoothly enter the spiral section b410 in the guide cylinder b408 under the guidance of the inclined opening 409 and complete the second-stage action. When the guide post 404 continues to advance in the spiral section b410, it will drive the guide cylinder b408 and the rotating shaft 400 to rotate in the reverse direction, and then drive the rotating ring 106 to rotate in the reverse direction, causing the iris piece 107 to slide open and increasing the diameter of the positioning opening 108, thereby releasing the clamping constraint on the end of the cylinder body.

[0059] Through this structural design, even if there are differences in the cylinder body size and different degrees of opening clamping, the guide post 404 can still stably transition, automatically adapt, and accurately drive to ensure that the release action of the iris piece 107 is stable and reliable, and the system operation has good fault tolerance and adaptability.

[0060] As a further solution of the present invention, a positioning strip 412 is connected to the cutting bracket 100 for restricting the initial position of the cylinder body frame 101; Through the above setting, the positioning strip 412 on the cutting bracket 100 can limit and control the position of the cylinder body frame 101 in the initial stage of loading, so that it always remains at a predetermined initial reference position before being driven. The positioning strip 412 and the cylinder body frame 101 cooperate to set a starting reference point, which helps to ensure that the cylinder body frame 101 has a consistent starting path during the subsequent movement driven by the driven structure and avoid the problem of inconsistent insertion depth of the cylinder body due to the deviation of the initial position.

[0061] As a further solution of the present invention, a connection opening 500 is provided on one side of the fixed ring 105. One side of the iris piece 107 is connected with a connecting rod 501 passing through the connection opening 500. One side of the positioning piece 110 is connected with a connecting rod 502 slidably connected with the connecting rod 501. A spring b503 is connected between the connecting rod 502 and the connecting strip 301; With the above settings, in the initial state, the positioning piece 110 is in a fixed position, which is used to define the initial insertion depth of the cylinder body, so that the end of the cylinder body can be accurately aligned to the standard cutting position during the insertion process. When the iris piece 107 is driven by the rotating ring 106 to open during the movement in the first section, the connecting rod 501 connected to one side of it can slide together through the connecting opening 500 on the fixed ring 105, and at the same time, the positioning piece 110 can also slide through the spring b503 and the connecting rod 502b to avoid the movement of the subsequent cylinder body.

[0062] After the cylinder body is inserted, the iris piece 107 starts to reset with the reverse rotation of the rotating ring 106, and the positioning opening 108 gradually shrinks to clamp the end of the cylinder body. At this time, the connecting rod 501 slides back with the iris piece 107. During this process, since there is already a cylinder body between the positioning pieces 110, the positioning piece 110 cannot return to the initial closed state completely. At this time, the spring b503 comes into play, which can limit the positioning piece 110 to the position of the outer wall of the cylinder body. Through the elastic buffering of the spring b503, the positioning piece 110 will not cause a rigid block to the reset action of the iris piece 107.

[0063] As a further solution of the present invention, the cutting and welding component includes a collar 600 connected to the fixed ring 105. A gear c601 is connected inside the collar 600. A laser cutting head 602 and a laser welding head 603 are connected to the inner wall of the gear c601. A motor 604 is connected to the fixed ring 105, and a gear d605 meshing with the gear c601 is connected to the driving shaft of the motor 604; With the above settings, the gear c601 is arranged inside the collar 600 and serves as the bearing rotation track for the cutting and welding heads. The laser cutting head 602 and the laser welding head 603 are fixedly installed on the inner wall of the gear c601 and can realize synchronous movement along the circumferential direction with the rotation of the gear c601.

[0064] A motor 604 is arranged on the fixed ring 105, and a gear d605 is connected to the driving shaft of the motor 604. The gear d605 meshes with the gear c601. When the motor 604 is started, the gear c601 is driven to rotate through gear transmission, and then the laser cutting head 602 or the laser welding head 603 installed on the inner wall of the gear c601 rotates along the circumference of the end of the cylinder body to realize 360° continuous cutting or welding operations.

[0065] This structure realizes the circumferential movement of the laser working station by rotating the collar 600, without moving the whole workpiece or the external guide rail system. It is not only compact in structure, but also high in processing accuracy and simple in control. It can effectively ensure the uniform cutting of the cylinder body port and the continuity of the weld seam, and improve the consistency of the automation operation efficiency and the joint quality.

[0066] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning and welding device for a heat exchanger assembly, comprising a cutting support, on which a cylinder frame and a flange frame are provided, and the two respectively have a fixing part a and a fixing part b, which are respectively used for fixing a cylinder and a flange assembly to be processed, and is characterized in that, A fixing ring is provided between the cylinder frame and the flange frame, and a rotating ring is provided on one side of the fixing ring; It further includes a plurality of iris pieces, which are connected to the rotating ring in a slidable manner and form a positioning opening around the center. During the rotation of the rotating ring, the iris pieces are driven to slide, thereby adjusting the diameter of the positioning opening. A positioning piece is provided on the other side of the fixing ring; It further includes a positioning component provided between the flange frame and the rotating ring, which is used to drive the flange frame to perform three-stage movement operations and control the rotation behavior of the rotating ring; A driven component provided between the flange frame and the cylinder frame, which is used to synchronously drive the cylinder frame to move when the flange frame executes a specific moving segment; A cutting and welding component provided on the fixing ring, which is used to perform laser cutting of the cylinder end and laser welding of the flange assembly; 2. The positioning and welding device for a heat exchanger assembly according to claim 1, wherein The fixing part a includes a connecting ring a connected inside the cylinder frame. A plurality of cylinders a are connected to the outer wall of the connecting ring a. The telescopic shaft of the cylinder a extends into the connecting ring a and is connected to a positioning block a.

3. The positioning and welding device for a heat exchanger assembly according to claim 1, characterized in that, The fixing part b includes a connecting ring b connected inside the flange frame. A plurality of cylinders b are connected to the outer wall of the connecting ring b. The cylinders b extend into the connecting ring b and are connected to a plurality of positioning blocks b. The length of the positioning block b is greater than the width of the connecting ring b and extends to one side of the connecting ring b.

4. A positioning and welding device for a heat exchanger assembly according to claim 1, characterized in that, The positioning component includes an oil cylinder connected to the cutting bracket, and the telescopic shaft of the oil cylinder is connected to the flange frame.

5. A positioning and welding device for a heat exchanger assembly according to claim 1, characterized in that, A limiting ring is connected to one side of the fixing ring. A connecting strip slidably connected to the limiting ring is connected to the outer wall of the rotating ring. An arc-shaped opening is formed in the side wall of the rotating ring, and a linear opening is formed in one side of the fixing ring. A convex platform a slidably matched with the arc-shaped opening is connected to one side of the iris piece, and a convex platform b slidably matched with the linear opening is connected to the other side.

6. The positioning and welding equipment for a heat exchanger assembly according to claim 5, wherein: The positioning component includes a structure for sequentially driving the flange frame to perform three-stage movement along a predetermined direction: The first-stage movement includes: The first sub-segment, driving the flange frame to move a first preset distance to rotate the rotating ring and increase the diameter of the positioning opening; The second sub-segment, driving the flange frame to continue moving a second preset distance, driving the cylinder frame to move through the driven component, inserting the cylinder end into the positioning opening, and making the positioning opening clamp and adapt to the cylinder end; The second-stage movement includes: The positioning component drives the rotating ring to rotate, increasing the diameter of the positioning opening and loosening and releasing the clamping constraint on the cylinder end; The third-stage movement includes: The flange frame further moves to make the flange assembly approach and contact the cylinder end; A rotating shaft is rotatably connected to the cutting bracket. A guiding cylinder a is connected to the rotating shaft. A spiral section a is formed in the guiding cylinder a, and a straight section a is formed at the end of the spiral section a. A guiding column is connected to the cutting bracket. A spring a is connected between the rotating ring and the limiting ring. One end of the rotating shaft is connected to a gear a, and a rack a meshing with the gear a is connected to the outer wall of the rotating ring; The driven component includes a rack b connected to the flange frame, a rack c connected to the cylinder frame, and a gear b rotatably connected to the cutting bracket and adapted to the rack b and meshing with the rack c.

7. A positioning and welding device for a heat exchanger assembly according to claim 6, characterized in that, A guide cylinder b is further connected to the rotating shaft. An inclined opening is formed at one end of the guide cylinder b facing the guide cylinder a. There is a spacing between the guide cylinder b and the guide cylinder a. A spiral section b is formed on the guide cylinder b, and a straight section b is formed at the end of the spiral section b.

8. A positioning and welding device for a heat exchanger assembly according to claim 6, characterized in that, A positioning strip is connected to the cutting bracket for restricting the initial position of the cylinder frame.

9. A positioning and welding device for a heat exchanger assembly according to claim 5, characterized in that, A connection opening is formed on one side of the fixing ring. A connecting rod passing through the connection opening is connected to one side of the iris piece. A link slidably connected to the connecting rod is connected to one side of the positioning piece. A spring b is connected between the link and the connection strip.

10. The positioning and welding device for a heat exchanger assembly according to claim 1, characterized in that, The cutting and welding component includes a collar connected to the fixing ring. A gear c is connected inside the collar. A laser cutting head and a laser welding head are connected to the inner wall of the gear c. A motor is connected to the fixing ring. A gear d meshing with the gear c is connected to the driving shaft of the motor.

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