Anti-deformation welding device suitable for vacuum chamber sector welding and method of anti-deformation welding device

Abstract

The invention discloses an anti-deformation welding device suitable for vacuum chamber sector welding and a method of the anti-deformation welding device, and relates to the technical field of welding equipment, in the welding process, the stability of a steel plate in the welding process is kept by clamping the two sides of a welding seam, the anti-deformation welding device comprises a machine body arranged in a welding work area, and a workbench is arranged on the inner side of the machine body; the welding assembly used for sector welding is arranged along the workbench, the clamping structures are arranged on the two sides of the sector to clamp the two sides of the sector, and the clamping structures are arranged in a self-adaptive mode, that is, when the sector is fixed, the clamping structures are attached to the inner wall and the outer wall of the sector, and the stability of the sector is kept. In the welding process of the sector section and the sector section of the vacuum chamber, the fixture, the clamping structure, the limiting telescopic piece and the driving and welding assembly work cooperatively, the integrated anti-deformation welding process from positioning and clamping to online restraining and releasing is achieved, and local and overall deformation caused by welding residual stress is effectively restrained.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to an anti-deformation welding device and method suitable for vacuum chamber sector welding. Background Technology

[0002] Vacuum chamber sectors are the basic sector-shaped structural units of the vacuum container (vacuum chamber) in a tokamak device. They are used to create a closed vacuum environment around the plasma region, ensuring stable plasma operation under high vacuum conditions. Each vacuum chamber sector, together with its cold shield and ambient coils, is precisely pre-assembled as a large-sized, complex equipment module to form a hoistable integral unit within the tokamak's central pit.

[0003] like Figure 1 The vacuum chamber 1 shown includes connecting sector 11, half sector 12 and end sector 13, and each sector is composed of a first sector 111, a second sector 112 and two third sector 113. When assembling and welding the vacuum chamber 1, the first sector 111, the second sector 112 and the third sector 113 need to be combined into multiple sectors first, and then the multiple sectors are combined and welded into the vacuum chamber 1.

[0004] CN118218893B discloses a welding fixture for the main body sector of a high-temperature superconducting tokamak vacuum chamber. By setting a limiting unit 1 and a limiting unit 2, multiple clamping units can simulate the outer wall shape of the clamped sector body and "memorize" the simulated shape, i.e., limit the simulated shape, thereby achieving the purpose of quickly clamping and fixing subsequent welding operations of sector bodies with the same specifications. Multiple clamping units can evenly distribute the clamping force, thereby avoiding the deformation of the weldment caused by excessive clamping force concentration. When fixing sector bodies of other specifications, the limiting unit 1 and the limiting unit 2 can release the previous shape "memory" and re-simulate the outer wall shape of the current specification sector body, making it a welding fixture adapted to the current sector body, greatly improving the applicability of the invention.

[0005] During the welding process of the sector segments, significant welding deformation often occurs due to the large plate thickness, high heat input of the weld, and multi-point distributed welding, including overall warping, local depressions, unilateral shortening, and twisting. To ensure the dimensional accuracy and vacuum sealing performance of the final assembly, welding deformation must be predicted and controlled online.

[0006] When welding between fan segments, the fan segments can be fixed by tooling, and the welding of the fan segments can be completed while ensuring stable clamping. However, when assembling the fan segments into a vacuum chamber, the limitations of the welding equipment mean that the same welding process cannot be used to complete the assembly welding of the fan segments and the assembly welding of the vacuum chamber.

[0007] Therefore, this application proposes a welding device applicable to both fan segment assembly welding and vacuum chamber assembly welding. The device provides stable support for the fan petals and segments in an adjustable manner during both processes, thereby preventing deformation during welding. Summary of the Invention

[0008] One of the objectives of this invention is to provide a deformation-resistant welding device and method suitable for vacuum chamber sector welding. During the welding process, the welding position is clamped and deformation is corrected, which can stably clamp the welding device when performing sector combination welding and vacuum chamber combination welding.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solution: a deformation-resistant welding device suitable for sector welding in a vacuum chamber, which maintains the stability of the steel plate during the welding process by clamping both sides of the weld. The device includes a machine body placed in the welding work area, a worktable arranged inside the machine body, and welding components for sector welding arranged along the worktable.

[0010] In the above scheme, clamping structures are set on both sides of the fan segment to clamp both sides of the fan segment.

[0011] The clamping structure is adaptive, meaning that when fixing the fan segment, the clamping structure fits against the inner and outer walls of the fan segment to maintain its stability.

[0012] A frame is provided at one end of the clamping structure away from the clamping surface. The frame is designed based on different specifications of fan segments. One type of fan segment is adapted to one type of frame. When the clamping structure clamps the fan segment, the back is supported by the frame.

[0013] In the above scheme, a locking block is provided at one end of the clamping structure away from the clamping surface, and multiple locking slots are provided on the outside of the frame. When the locking slots and locking blocks cooperate, the frame forms support and limit for the clamping structure.

[0014] In the above scheme, a limiting protrusion is set inside the frame based on the distance between two adjacent frames. When the limiting protrusion protrudes, it limits the movement of the locking block.

[0015] The mold frame is equipped with a telescopic component for adjusting the limiting protrusion. This telescopic component adjusts the protrusion and retraction of the limiting protrusion by adjusting the distance between adjacent mold frames.

[0016] In the above scheme, the workbench is equipped with a positioning frame for fixing the template. The positioning frame is fixed on the workbench, and the inner side of the positioning frame is equipped with a drive structure for driving the template to move. The actuating end of the drive structure is connected to the template. When welding the sector segment, the movement of the drive structure causes the template to approach and separate through the actuating end.

[0017] In the above scheme, the drive structure and the frame are connected by a quick-release head.

[0018] The quick-release head includes a fixed head that connects to the moving end of the drive structure and a mounting head that connects to the frame. A mounting ring is fitted on the outside of the mounting head, and a clamping block is configured on the inside of the mounting head. The clamping block cooperates with the mounting head. The mounting ring rotates to a specific angle to restrict the clamping block to fit against the fixed head. When the mounting head fits against the fixed head, the frame is fixed to the moving end of the drive structure.

[0019] In the above scheme, the frame is set as a multi-segment frame. When passing through the window, the frame unfolds, which makes it easy to place the frame inside the vacuum chamber. The frame is composed of a multi-segment split frame. Adjacent split frames are connected end to end. The slot is set along the circumference of the frame. The beginning and end of the frame are locked and formed by eccentric locking pins and wedge block assemblies.

[0020] In the above scheme, multiple installation positions are set along the card slot path. Each installation position corresponds to a telescopic component and a limiting protrusion. When the limiting protrusion of any installation position is in a supporting state, the telescopic component pushes or lifts to change the limiting frame of the adjacent installation position from a non-limiting state to a limiting state, thereby realizing sequential linkage along the card slot path.

[0021] In the above scheme, magnets are installed inside the frame. During the reset process of the limit frame, the magnets attract the limit frame to avoid the reset accuracy affecting the smoothness of the sliding block in the slot.

[0022] One end of the limiting frame is hinged to the mold frame and can swing relative to the mold frame. The limiting protrusion is equipped with a spring that supports its transition from the limiting state to the non-limiting state. The telescopic component includes a pressure plate disposed on the inner side of the mold frame. One end of the pressure plate is hinged to the mold frame. When the pressure plate presses into the mold frame, it pushes the limiting protrusion to the limiting state. At this time, the limiting protrusion supports the clamping structure.

[0023] The inner side of the frame is provided with protrusions to limit the pressure plate to be in the extrusion limiting protrusion state. The pressure plate is limited after being pressed into the inner side of the protrusions.

[0024] In the above scheme, a rod is provided on one side of the limiting frame that is pressed into the mold frame. The rod extends through the mold frame to the pressure plate. The pressure plate is pressed into the protrusion and the limiting frame is pushed into the limiting state by the rod.

[0025] In the above scheme, a hydraulic pipe is set between the limiting frame and the limiting protrusion. An annular cavity is set inside the limiting protrusion and filled with a medium. When the limiting protrusion is in the limiting state, the medium inside the annular cavity is squeezed and the hydraulic pipe pushes the limiting frame to switch to the limiting state.

[0026] In the above scheme, the clamping structure includes a mounting frame, which is connected to the card block. A support plate is provided inside the mounting frame, and a driver is provided between the support plate and the mounting frame to drive the support plate to change the bending curvature.

[0027] In the above scheme, the driver consists of two parts. The first part is a push-pull rod that connects the support plate to one end of the middle of the mounting frame. The push-pull rod extends and retracts to change the extension and retraction state of the support plate extending to one end of the middle of the mounting frame. The second part is a push rod that connects the other end of the support plate. The support plate is L-shaped and inserted into the inside of the mounting frame. The push rod pushes the support plate to move.

[0028] In the above scheme, in order to further improve the support strength of the support plate, the mounting frame is equipped with support bodies inside to support the support plate. The support bodies are arranged in an array. The mounting frame is equipped with a card plate inside, and the support body passes through the card plate. A damping ring is set at the connection position between the support body and the card plate, and the damping ring is fixedly installed on the inner side of the card plate.

[0029] In the above scheme, a cylinder is installed inside the mounting frame to support the support body. The support body includes a rod, a push plate, and a reinforcing rib. The push plate is fixed to one end of the rod and contacts the support plate. The reinforcing rib is fixed to the outside of the rod and extends outward. The reinforcing rib supports the push plate of the adjacent support body.

[0030] The push plate is designed to increase the support area of ​​the support body. However, when the push plate is attached to the support plate, it will also bend under the influence of the support plate, making it difficult to achieve the purpose of support. Therefore, the push plate is further supported by the reinforcing ribs to further ensure its stability.

[0031] Through the above technical solution, the present invention has the following beneficial effects: 1. In the process of welding vacuum chamber sector segments and fan petals, the frame, clamping structure, limiting telescopic component and drive and welding components work together to realize an integrated anti-deformation welding process from positioning, clamping to online constraint and release, effectively suppressing local and overall deformation caused by welding residual stress.

[0032] 2. The multi-segment / replaceable frame supports rapid adaptation of different specifications of sector segments and allows for high repeatability positioning and locking inside the vacuum chamber after opening the window. It balances assembly accessibility and positioning accuracy, making it convenient for on-site replacement and maintenance.

[0033] 3. The flexible support plate, together with the push-pull rod and the top rod, enables the fitting of different arc segments, segment stiffness adjustment and high repeatability clamping, and combines precise positioning with protection of the workpiece surface.

[0034] 4. The card slot, card block, telescopic component, and limit structure form a chain-type limit mechanism, realizing sequential linkage limit, magnetic / spring or hydraulic assisted drive and mechanical reset, which not only ensures the accurate and stable entry of the clamping position, but also facilitates quick unlocking and repeated reset verification.

[0035] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the vacuum chamber sector of the present invention. Figure 1 In the diagram, a is a schematic diagram of the vacuum chamber in the combined state of the sector segments, b is a schematic diagram of the structure of the half sector segment and the last sector segment, and c is a disassembled diagram of the sector segment. Figure 2 This is a perspective view of the welding apparatus of the present invention; Figure 3 This is a schematic diagram of the frame structure of the first embodiment of the present invention; Figure 4 This is a schematic diagram of the independent frame structure of the present invention; Figure 5 This is a schematic diagram showing the connection between the frame and the quick-release head of the present invention; Figure 6 This is a schematic diagram of the frame according to the second embodiment of the present invention; Figure 7 This is a schematic diagram of the pressure bar structure of the present invention; Figure 8 This is a schematic diagram of the base magnetic block and the movable magnetic block of the present invention; Figure 9 This is a plan view of the base magnetic block and the movable magnetic block of the present invention; Figure 10 This is a schematic diagram of the pressure plate structure of the present invention; Figure 11 This is a partial cross-sectional view of the frame of the present invention; Figure 12 This is a plan view of the insertion rod structure of the present invention; Figure 13 This is a plan view of the hydraulic pipe structure of the present invention; Figure 14 This is a schematic diagram of the quick-release head of the present invention. Figure 1 ; Figure 15 This is a schematic diagram of the quick-release head of the present invention. Figure 2 ; Figure 16 This is a schematic diagram of the clamping structure of the present invention; Figure 17 This is a schematic diagram of the support plate of the present invention; Figure 18 This is a schematic diagram of the support structure of the present invention; Figure 19 This is a schematic diagram of the damping ring of the present invention; Figure 20This is a schematic diagram showing the connection between the support body and the cylinder of the present invention.

[0037] In the diagram: 1. Vacuum chamber; 2. Machine body; 3. Worktable; 4. Welding assembly; 5. Clamping structure; 6. Frame. 11 Connecting fan segment, 12 Half fan segment, 13 Last fan segment, 111 First fan petal, 112 Second fan petal, 113 Third fan petal; 21 Positioning bracket, 22 Quick release head, 221 Fixing head, 222 Mounting head, 223 Clamping block, 224 Mounting ring, 23 Drive structure; 61. Card block; 62. Card slot; 63. Split frame; 51 Mounting bracket, 52 Support plate, 53 Push-pull rod, 54 Top rod, 55 Clamping plate, 56 Damping ring, 57 Support body, 571 Rod body, 572 Push plate, 573 Reinforcing rib; 711 Limiting protrusion, 712 Telescopic component, 713 Base magnet, 714 Movable magnet, 715 Push block, 716 Cavity, 717 Pressure rod, 718 Limiting frame, 719 Magnet, 720 Pressure plate, 721 Protrusion, 722 Spring, 723 Insert rod, 724 Ring cavity, 725 Hydraulic pipe. Detailed Implementation

[0038] The following describes several embodiments of the present invention with reference to the accompanying drawings. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not essential. And features of different embodiments may be interchanged if feasible.

[0039] Unless otherwise defined, all terms used herein (including technical and scientific terms) have their ordinary meanings, which are understandable to those skilled in the art. Furthermore, the definitions of the foregoing terms in commonly used dictionaries should be interpreted in the context of this specification as having the meaning consistent with the relevant field of this invention. Unless specifically defined, these terms will not be construed as having idealized or overly formal meanings.

[0040] The following explains the relationships and terms used in this application: Parallelism: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism. It allows for situations where the parallelism is not absolute due to factors such as assembly tolerance, design tolerance, and structural flatness. It also allows for errors within a small angular range, such as within 10 degrees of assembly error. These can all be considered as parallel relationships.

[0041] Perpendicularity: The perpendicularity defined in this application is not limited to an absolute perpendicular intersection (with an included angle of 90 degrees). It is permissible for non-absolute perpendicular intersections caused by factors such as assembly tolerances, design tolerances, and structural flatness. It is permissible for errors within a small angular range, such as an assembly error range of 80 to 100 degrees, which can all be understood as a perpendicular relationship.

[0042] Ground: The ground as defined in this application is not limited to a specific material or region, but simply refers to a platform on which this application is supported, and allows for stacking, tilting, and variations in flatness. For example, cement floors, tile floors, work platforms, etc., can all be interpreted as ground.

[0043] The above explanation does not fully encompass the relationship definition given in this application, but only represents a part of it.

[0044] First Embodiment See Figures 2-5 , Figures 7-9 as well as Figures 14-15 As shown, the first embodiment of the present invention provides an anti-deformation welding device suitable for sector welding in a vacuum chamber. During the welding process, the device maintains the stability of the steel plate by clamping both sides of the weld. The device includes a body 2 placed in the welding work area, a worktable 3 arranged inside the body 2, and welding components 4 for sector welding arranged along the worktable 3.

[0045] During the welding process of the sector segment, the welding component 4 moves along the weld seam of the sector segment to complete the welding of the sector segment. In order to ensure the stability of the sector segment during the welding process and avoid deformation, clamping structures 5 are set on both sides of the sector segment to clamp the sector segment.

[0046] Since the fan segment is designed to be curved, the clamping structure 5 is adaptively set to better fit the shape of the fan segment. That is, when fixing the fan segment, the clamping structure 5 fits the inner and outer walls of the fan segment to maintain the stability of the fan segment.

[0047] Since the curvature of different fan segments varies, the clamping structure 5 needs to be adjusted to better fit the curvature of the fan segment. In order to limit the position of the clamping structure 5 and make the adjustment of the clamping structure 5 more precise, a frame 6 is set at the end of the clamping structure 5 away from the clamping surface. The frame 6 is set according to different fan segments, and one frame 6 is adapted to one fan segment. When the clamping structure 5 clamps the fan segment, the back is supported by the frame 6.

[0048] The clamping structure 5 has a locking block 61 at one end away from the clamping surface, and the frame 6 has multiple slots 62 on the outside. When the slots 62 and the locking block 61 cooperate, the frame 6 provides support and limits for the clamping structure 5.

[0049] Furthermore, when the clamping block 61 provided in the clamping structure 5 is installed in the slot 62, it is slidably installed. During welding, both the clamping structure 5 and the frame 6 need to maintain good stability. The frame 6 is provided with a limiting protrusion 711 that is adjusted based on the distance between two adjacent frames 6. When the limiting protrusion 711 protrudes, it limits the clamping block 61.

[0050] The mold frame 6 is provided with a telescopic member 712 for adjusting the limiting protrusion 711. The telescopic member 712 adjusts the protrusion and retraction of the limiting protrusion 711 by adjusting the distance between adjacent mold frames 6.

[0051] In one embodiment of the first embodiment, the slots 62 of adjacent frames 6 at the same weld position are staggered, that is, during installation, adjacent frames 6 are staggered when installing the clamping structure 5. A push block 715 is provided on the inner side of the frame 6. The contact surface between the push block 715 and the limiting protrusion 711 is inclined. A movable magnetic block 714 is provided on the outer side of the push block 715. A base magnetic block 713 is provided on the adjacent frames 6 at the position corresponding to the movable magnetic block 714. When the two frames 6 are close, the base magnetic block 713 and the movable magnetic block 714 repel each other magnetically. The pushing block 715 pushes out the limiting protrusion 711 to limit the locking block 61.

[0052] The base magnetic block 713 and the movable magnetic block 714 work together to drive the limiting protrusion 711. When the two adjacent frames 6 are in a non-contact state, the limiting protrusion 711 is adjusted to limit the position of the locking block 61. The end of the limiting protrusion 711 that limits the locking block 61 is arc-shaped. When the frame 6 is removed, the movable magnetic block 714 loses the magnetic force of the base magnetic block 713. At this time, when the locking block 61 is pulled outward, it compresses the limiting protrusion 711 to contract.

[0053] However, due to the magnetoelastic force between the base magnetic block 713 and the movable magnetic block 714, when the force of the locking block 61 moving outward is large, the push block 715 will retract. This situation depends on the magnitude of the magnetic force between the base magnetic block 713 and the movable magnetic block 714.

[0054] The base magnetic block 713 and the movable magnetic block 714 are opposite each other with the same pole, forming a repulsive force; the inclined surface of the push block 715 converts the repulsive force into a longitudinal pushing force; the reset is provided by the limiting protrusion 711 pressing the push block 715, and the magnetic force is only used for triggering and does not provide a return.

[0055] Therefore, in the first embodiment of the present invention, there is another implementation: a cavity 716 is opened inside the frame 6, a limiting protrusion 711 is located at one end of the cavity 716, and a pressure rod 717 is provided at the other end of the cavity 716. The pressure rod 717 and the limiting protrusion 711 form a seal on the openings at both ends of the cavity 716. The cavity 716 is filled with a medium, which compresses the pressure rod 717 when the two frames 6 are close together.

[0056] In this embodiment, the opening position of the slot 62 is not restricted. However, when the slots 62 of the two frames 6 are in opposite positions, the pressure rod 717 is in the same position as the pressure rod 717, and the pressure rod 717 is in the form of protruding outward. Therefore, when the pressure rods 717 are in the same position, the length of the pressure rod 717 is shorter than that of the slot 62 when they are misaligned, and its manufacturing cost is lower.

[0057] In a further embodiment of the first embodiment, the workbench 3 is provided with a positioning frame 21 for fixing the mold frame 6. The positioning frame 21 is fixed on the workbench 3, and a driving structure 23 for driving the mold frame 6 to move is arranged inside the positioning frame 21. The actuating end of the driving structure 23 is connected to the mold frame 6. When welding the sector segment, the driving structure 23 moves through the actuating end to make the mold frame 6 approach and separate.

[0058] The drive structure 23 is used to change the position of the frame 6 within a certain range. The frame 6 can be controlled by the slide table, hydraulic rod 717 and other structures. In order to facilitate the replacement of the frame 6 according to different specifications of the fan segments, the drive structure 23 is connected to the frame 6 by a quick-release head 22.

[0059] The quick-release head 22 includes a fixed head 221 that connects to the moving end of the drive structure 23, and a mounting head 222 that connects to the frame 6. A mounting ring 224 is sleeved on the outside of the mounting head 222, and a clamping block 223 is arranged on the inside of the mounting head 222. The clamping block 223 cooperates with the mounting head 222. The mounting ring 224 rotates to a specific angle to restrict the clamping block 223 to fit against the fixed head 221. When the mounting head 222 fits against the fixed head 221, the frame 6 is fixed to the moving end of the drive structure 23.

[0060] To improve the stability of the clamping block 223 in holding the fixing head 221, the clamping block 223 is configured as a magnetic structure. That is, after the mounting head 222 is connected to the fixing head 221, the clamping block 223 magnetically attracts the fixing head 221. After the mounting ring 224 further supports the clamping block 223, the clamping block 223 magnetically attracts the mounting ring 224.

[0061] By using the mounting ring 224 to support the clamping block 223, the stability of the clamping block 223 after clamping the fixing head 221 is further improved. When it is necessary to remove it, the mounting ring 224 is rotated to disengage from the clamping block 223. After the clamping block 223 loses its support, the fixing head 221 and the mounting head 222 can be separated.

[0062] Second Embodiment See Figure 6 as well as Figures 10-13 As shown, the second embodiment of the present invention provides an anti-deformation welding device suitable for welding sector sections in a vacuum chamber. During the welding process, the device maintains the stability of the steel plate by clamping both sides of the weld. The device includes a body 2 placed in the welding work area, and clamping structures 5 are set on both sides of the sector section to clamp both sides of the sector section. The body 2 is equipped with welding components 4 for welding the sector section. A frame 6 is set at one end of the clamping structure 5 away from the clamping surface. The frame 6 is set according to different specifications of sector sections, and one type of sector section is adapted to one type of frame 6. When the clamping structure 5 clamps the sector section, the back is supported by the frame 6. A locking block 61 is set at one end of the clamping structure 5 away from the clamping surface. Multiple slots 62 are set on the outside of the frame 6. When the slots 62 and the locking blocks 61 are engaged, the frame 6 forms support and limit for the clamping structure 5. An extension member 712 is set inside the frame 6 to adjust the protrusion and retraction of the limit protrusion 711 by adjusting the distance between adjacent frames 6. Some structures in the second embodiment of the present invention are the same as those in the first embodiment, and their effects will not be described in detail here. Only the differences between the second embodiment and the first embodiment will be explained.

[0063] In one embodiment of the second embodiment, the combination of the telescopic member 712 and the limiting protrusion 711 is used to limit the position of the clamping structure 5 along the frame 6 and to form support for the clamping structure 5. That is, in this embodiment, the focus is on the welding of the fan segments into a vacuum chamber. The frame 6 is different from the first embodiment, which focuses on the welding of fan segments into fan petals. Since the welding openness of the vacuum chamber is low, it is necessary to support the weld position inside the vacuum chamber. Moreover, due to the limitation of the window size, it is extremely difficult to support the fan segments inside the vacuum chamber.

[0064] Therefore, the frame 6 is designed to be multi-segmented. When passing through the window, the frame 6 unfolds, which makes it easy to place the frame 6 inside the vacuum chamber. The frame 6 is composed of multi-segmented split frames 63, with adjacent split frames 63 connected end to end. The slots 62 are arranged around the circumference of the frame 6, and the beginning and end ends of the frame 6 are locked and formed by eccentric locking pins and wedge block assemblies.

[0065] Multiple installation positions are set along the path of the slot 62. Each installation position corresponds to a telescopic component 712 and a limiting protrusion 711. When the limiting protrusion 711 of any installation position is in a supporting state, the telescopic component 712 pushes or lifts to change the limiting frame 718 of the adjacent installation position from a non-limiting state to a limiting state, thereby realizing sequential linkage along the path of the slot 62.

[0066] By utilizing the sequential linkage set by the path of the card slot 62, the clamping structure 5 installed first can be used to limit the clamping structure 5 installed later, so that the clamping structure 5 corresponds to the limiting protrusion 711.

[0067] Since the limiting frame 718 needs to switch between a limiting state and a non-limiting state, a magnet 719 is installed inside the frame 6 to ensure the reset accuracy between the limiting frame 718 and the inner wall of the slot 62 when switching from the limiting state to the non-limiting state. During the reset process of the limiting frame 718, the magnet 719 magnetically attracts the limiting frame 718 to avoid the reset accuracy affecting the smooth sliding of the card block 61 in the slot 62.

[0068] One end of the limiting bracket 718 is hinged to the mold frame 6 and can swing relative to the mold frame 6. The limiting protrusion 711 is internally configured with a spring 722 that supports its transition from the limiting state to the non-limiting state. The telescopic member 712 includes a pressure plate 720 disposed inside the mold frame 6. One end of the pressure plate 720 is hinged to the mold frame 6. When the pressure plate 720 presses into the mold frame 6, it pushes the limiting protrusion 711 to the limiting state. At this time, the limiting protrusion 711 supports the clamping structure 5.

[0069] The inner side of the frame 6 is provided with a protrusion 721 to limit the pressure plate 720 to be in the state of the compression limiting protrusion 711. The pressure plate 720 is limited after being pressed into the inner side of the protrusion 721.

[0070] The oscillation of the pressure plate 720 is used to control the limiting protrusion 711. After the pressure plate 720 squeezes the limiting protrusion 711, the protrusion 721 restricts the pressure plate 720 to maintain its stability. Since the spring 722 supports the limiting protrusion 711, in order to reduce the pressure plate 720 from disengaging from the protrusion 721 after squeezing the limiting protrusion 711, the limiting protrusion 711 is positioned close to the connection position between the pressure plate 720 and the frame 6.

[0071] In one embodiment, a rod 723 is provided on one side of the limiting frame 718 that is pressed into the mold frame 6. The rod 723 extends through the mold frame 6 to the pressure plate 720. The pressure plate 720 is pressed into the protrusion 721 and the rod 723 pushes the limiting frame 718 into the limiting state.

[0072] In addition, to increase the linkage between the pressure plate 720 and the insertion rod 723, the insertion rod 723 can react quickly after the pressure plate 720 is opened. One end of the insertion rod 723 is elastically set. The pressure plate 720 has a round hole. When the pressure plate 720 is pressed into the protrusion 721, one end of the insertion rod 723 is inserted into the round hole, so that the pressure plate 720 can drive the insertion rod 723 to move when it is opened, so that the limit frame 718 can be retracted.

[0073] In another embodiment, a hydraulic pipe 725 is provided between the limiting frame 718 and the limiting protrusion 711. An annular cavity 724 is provided on the inner side of the limiting protrusion 711 and filled with a medium. When the limiting protrusion 711 is in the limiting state, the medium inside the annular cavity 724 is squeezed and the hydraulic pipe 725 pushes the limiting frame 718 to the limiting state.

[0074] The pressure plate 720 controls the limiting protrusion 711 and the limiting frame 718, thereby limiting the movement of the clamping structure 5 and ensuring the stability of the clamping structure 5 when clamping the sector segment.

[0075] Third Embodiment See Figures 16-20 As shown, the third embodiment of the present invention proposes a clamping structure 5 for use in the first and second embodiments. The clamping structure 5 is mounted on the frame 6 proposed in the first and second embodiments. The frame 6 limits the clamping structure 5 to ensure the stability of the clamping structure 5 during use.

[0076] The clamping structure 5 includes a mounting frame 51, which is connected to the card block 61. A support plate 52 is provided inside the mounting frame 51. A driver is provided between the support plate 52 and the mounting frame 51 to drive the support plate 52 to change its bending curvature.

[0077] The actuator consists of two parts. The first part is a push-pull rod 53 that connects the support plate 52 to one end of the middle of the mounting bracket 51. The push-pull rod 53 extends and retracts to change the extension and retraction state of the support plate 52 to one end of the middle of the mounting bracket 51. The second part is a push rod 54 that connects the other end of the support plate 52. The support plate 52 is L-shaped and inserted into the inside of the mounting bracket 51. The push rod 54 pushes the support plate 52 to move.

[0078] The support plate 52 is bendable. When the push-pull rod 53 and the top rod 54 change the position of the two sides of the support plate 52, the curvature of the support plate 52 changes so as to meet the purpose of the clamping structure 5 to adapt to different specifications of fan segments.

[0079] In a further embodiment of the third embodiment, in order to further improve the support strength of the support plate 52, a support body 57 is configured inside the mounting frame 51 to support the support plate 52. The support body 57 is arranged in an array. A card plate 55 is provided inside the mounting frame 51. The support body 57 passes through the card plate 55. A damping ring 56 is provided at the connection position between the support body 57 and the card plate 55. The damping ring 56 is fixedly installed inside the card plate 55.

[0080] The mounting bracket 51 is equipped with a cylinder to support the support body 57. The support body 57 includes a rod 571, a push plate 572 and a reinforcing rib 573. The push plate 572 is fixed to one end of the rod 571 and contacts the support plate 52. The reinforcing rib 573 is fixed to the outside of the rod 571 and extends outward. The reinforcing rib 573 supports the push plate 572 of the adjacent support body 57.

[0081] The push plate 572 is designed to increase the support area of ​​the support body 57. When the push plate 572 is attached to the support plate 52, the push plate 572 will also bend under the influence of the support plate 52, making it difficult to achieve the purpose of support. Therefore, the push plate 572 is further supported by the reinforcing rib 573 to further ensure the stability of the push plate 572.

[0082] Fourth embodiment The fourth embodiment of the present invention provides a vacuum chamber sector welding method for a welding apparatus combining the first and third embodiments or the second and third embodiments described above. The welding method includes the following steps: Obtain the target sector specifications and determine the arc and weld path, then select the frame 6 that matches the specifications; Insert the clamping structure 5 into the slot 62 of the frame 6 and make the block 61 slide in the slot 62. Adjust the telescopic member 712 so that the limiting protrusion 711 forms an orderly limit on the clamping structure 5 on the path of the slot 62. The first push-pull rod 53 and the second push rod 54 drive the support plate 52 to change its curvature, so that the clamping surface adapts to fit the inner and outer walls of the fan segment and completes stable clamping. The drive welding assembly 4 welds along the weld path, and during the welding process, the frame 6 supports and limits the clamping structure 5 to suppress welding deformation. After welding, release the limiting and clamping, remove the frame 6 and clamping structure 5, and re-inspect the weld and sector shape and position.

[0083] Although the present invention has been disclosed in conjunction with the above embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A deformation-resistant welding device for sector welding in a vacuum chamber, comprising a body (2) placed in the welding work area, a worktable (3) arranged inside the body (2), and welding components (4) for sector welding arranged along the worktable (3), characterized in that, The welding device also includes clamping structures (5) disposed on both sides of the weld and a frame (6) for supporting and limiting the clamping structures (5). The clamping structure (5) has a locking block (61) on its back away from the clamping surface. The frame (6) has multiple slots (62) along the path of the slot (62) on its outer side. The locking block (61) can slide and engage in the slot (62) so that the frame (6) provides support and position limit for the clamping structure (5). The frame (6) is provided with a limiting mechanism, which includes a limiting protrusion (711) that can switch between "limited / non-limited" states, and a telescopic member (712) associated with the limiting protrusion (711). The telescopic member (712) is used to drive the limiting protrusion (711) to selectively abut against the card block (61), thereby achieving orderly limiting of the clamping structure (5) on the path of the card slot (62). The clamping structure (5) includes a mounting bracket (51) connected to the card block (61) and a support plate (52) arranged inside the mounting bracket (51). The support plate (52) is a flexible structure and is driven by a first push-pull rod (53) and a second top rod (54) located on both sides of the support plate (52) to change the curvature of the support plate (52), thereby adaptively fitting the fan segments with different curvatures and achieving stable clamping.

2. The anti-deformation welding device for vacuum chamber sector welding according to claim 1, characterized in that, The frame (6) is an external frame (6) for pre-assembly welding of sector segments. Two adjacent frames (6) are respectively provided with a base magnetic block (713) and a movable magnetic block (714) at corresponding positions. The two are opposite to each other with the same pole to generate a repulsive force. The frame (6) is provided with a push block (715) that contacts the limiting protrusion (711). The push block (715) has an inclined surface to convert the repulsive force into a driving force along the pushing direction of the limiting protrusion (711), pushing the limiting protrusion (711) from a non-limiting state to a limiting state. The limiting protrusion (711) retracts after the two frames (6) separate and the clamping structure (5) disengages from the slot (62).

3. The anti-deformation welding device for vacuum chamber sector welding according to claim 1, characterized in that, The frame (6) has a cavity (716) inside, a limiting protrusion (711) is located at one end of the cavity (716), and a pressure rod (717) is provided at the other end of the cavity (716). The pressure rod (717) and the limiting protrusion (711) form a seal for the openings at both ends of the cavity (716). The cavity (716) is filled with a medium, and the two frames (6) squeeze the pressure rod (717) when they are close together.

4. The anti-deformation welding device for vacuum chamber sector welding according to claim 1, characterized in that, The frame (6) is a structure of multiple split frames (63), with adjacent split frames (63) hinged at the ends, and can be combined and locked into shape after passing through the window; The slot (62) is arranged around the frame (6), and the card block (61) is inserted into the slot (62) when the split frame (63) is not assembled.

5. The anti-deformation welding device for vacuum chamber sector welding according to claim 4, characterized in that, Multiple installation positions are set along the path of the slot (62), and each installation position is provided with a limiting frame (718) corresponding to the limiting protrusion (711). When the limiting protrusion (711) at any installation position is in a supported state, the telescopic member (712) pushes or lifts to change the limiting frame (718) of the adjacent installation position from a non-limiting state to a limiting state, thereby realizing sequential linkage along the path of the slot (62).

6. The anti-deformation welding device for vacuum chamber sector welding according to claim 5, characterized in that, A pressure plate (720) is provided inside the frame (6). One end of the pressure plate (720) is hinged to the frame (6) and is arranged opposite to the limiting protrusion (711). When the pressure plate (720) is pressed in, it drives the limiting frame (718) to the limiting state; The frame (6) has protrusions (721) on its inner side to limit and lock the travel of the pressure plate (720); A spring (722) is disposed outside the limiting protrusion (711) for resetting the limiting protrusion (711) from the limiting state to the non-limiting state; Furthermore, a rod (723) is provided between the limiting frame (718) and the pressure plate (720). The rod (723) passes through the frame (6) and drives the limiting frame (718) to reset when the pressure plate (720) is withdrawn.

7. The anti-deformation welding device for vacuum chamber sector welding according to claim 6, characterized in that, The inner side of the limiting protrusion (711) is provided with an annular cavity (724) and filled with hydraulic medium. A hydraulic pipe (725) is provided in the frame (6) between the limiting protrusion (711) and the limiting frame (718). When the limiting protrusion (711) is pressed, it squeezes the medium in the annular cavity (724) and drives the limiting frame (718) to enter the limiting state through the hydraulic pipe (725).

8. The anti-deformation welding device for vacuum chamber sector welding according to claim 1, characterized in that, The first push-pull rod (53) and the second top rod (54) act on the two ends of the support plate (52) at different support positions to form a reversible elastic bending; The mounting frame (51) is provided with an array support body (57) and a cylinder is configured to support the support body (57). Each support body (57) includes a rod body (571), a push plate (572) that contacts the support plate (52), and a reinforcing rib (573). The push plate (572) is connected to the rod body (571), and the reinforcing rib (573) is fixed to the outside of the rod body (571). The mounting bracket (51) has a card plate (55) with a damping ring (56) embedded inside. The support body (57) passes through the card plate (55) in the mounting bracket (51) and contacts the damping ring (56).

9. The anti-deformation welding device for vacuum chamber sector welding according to claim 1, characterized in that, The positioning frame (21) is provided with a driving structure (23) to make the frame (6) move towards or away from each other; The drive structure (23) is connected to the frame (6) via a quick-release head (22), which includes a fixing head (221), a mounting head (222), a clamping block (223), and a mounting ring (224) to enable quick replacement and repeated positioning of the frame (6).

10. A vacuum chamber sector welding method, used in the anti-deformation welding device for vacuum chamber sector welding as described in any one of claims 1-9, characterized in that, Includes the following steps: Obtain the target sector specification and determine the arc and weld path, and select a frame that matches the specification (6). Insert the clamping structure (5) into the slot (62) of the frame (6) and make the block (61) slide in the slot (62). Adjust the telescopic component (712) so that the limiting protrusion (711) forms an orderly limit on the clamping structure (5) on the path of the slot (62). The support plate (52) is driven by the first push-pull rod (53) and the second push rod (54) to change the curvature, so that the clamping surface adapts to fit the inner and outer walls of the fan segment and completes stable clamping; The drive welding assembly (4) is used to weld along the weld path. During the welding process, the frame (6) supports and limits the clamping structure (5) to suppress welding deformation. After welding, release the limiting and clamping, remove the frame (6) and clamping structure (5), and re-inspect the weld and sector shape and position.

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