A high temperature superconducting magnet external joint welding device

Abstract

The utility model relates to high temperature superconductive material welding technical field discloses a high temperature superconductive magnet external joint welding device, is applied to the external joint of welding preparation high temperature superconductive magnet, and welding device includes workstation and welding assembly, and the workstation is provided with clamp, and the clamp is used for clamping the high temperature superconductive magnet in vertical state, welding assembly includes support, and the support sets up in the top of workstation, and the support is provided with lower mould, and the top of lower mould is provided with welding bearing surface, and the arrangement direction of welding bearing surface is mutually parallel with the axial direction of high temperature superconductive magnet in vertical state, and lower mould is used for the horizontal placement of the external joint of high temperature superconductive magnet, welding assembly still includes welding part and drive part, and drive part drives welding part to carry out welding to the external joint placed on welding bearing surface, the utility model is applicable to the intelligent standardization production of external joint welding preparation in the high temperature superconductive magnet manufacturing process.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature superconducting material welding technology, specifically to a welding device for external joints of high-temperature superconducting magnets. Background Technology

[0002] High-temperature superconducting (HTS) tape technology has become increasingly mature. Superconducting magnets made from second-generation HTS tapes are widely used in controlled nuclear fusion magnetic confinement, particle accelerators, and magnetic resonance imaging. Superconducting magnets are usually composed of multiple disc coils (specifically single or double disc coils) stacked together. The disc coils are made by winding superconducting tapes. If the length of a single superconducting tape is insufficient to form a disc coil, another superconducting tape is needed. That is, the connection point of multiple superconducting tapes in the same disc coil forms an internal joint. Low-resistance superconducting joints are needed to connect the coils in series in the superconducting magnet. The disc joints between coils are external joints. External joints are made by welding a small section of the outermost tape of two adjacent coils to the same bridging tape. The performance of the external joints directly affects the performance and operation of the high-temperature superconducting magnet.

[0003] Currently, high-temperature superconducting tape joint welding equipment is mainly used for welding and preparing internal joints of coils. Due to the certain dimensions of the magnet skeleton and disc coil, existing high-temperature superconducting tape structure welding equipment cannot meet the welding and preparation of external joints of high-temperature superconducting magnets. Traditionally, welding of external joints of high-temperature superconducting magnets usually involves horizontally mounting the high-temperature superconducting magnet on a tooling fixture, followed by manual welding of the external joints. Since the high-temperature superconducting magnet is horizontally mounted on the tooling fixture, manual welding requires twisting the superconducting tape to make the surface of the external joint horizontally arranged, thus facilitating the welding operation. However, twisting the superconducting tape causes damage to the superconducting tape, and welding is inconvenient. In particular, when multiple external joints need to be welded, the influence of human factors is significant, resulting in a significant impact on the uniformity and mechanical properties of the external joints. Furthermore, the entire welding process involves high labor intensity and low welding efficiency. Utility Model Content

[0004] In view of this, the present invention provides a welding device for the external connector of a high-temperature superconducting magnet, in order to solve the problems of poor welding quality, high labor intensity and low welding efficiency of the existing welding preparation method for the external connector of a high-temperature superconducting magnet.

[0005] This invention provides a welding device for the external connector of a high-temperature superconducting magnet, used for welding the external connector in the fabrication of high-temperature superconducting magnets. The welding device includes:

[0006] Workbench;

[0007] A clamp is provided on the worktable and is used to clamp a high-temperature superconducting magnet in a vertical position;

[0008] The welding assembly includes a support frame disposed above the worktable. A lower mold is disposed on the support frame, and a welding bearing surface is disposed at the top of the lower mold. The welding bearing surface is arranged in a direction parallel to the axis of the high-temperature superconducting magnet in a vertical position. The welding bearing surface is used for horizontal placement of the external connector of the high-temperature superconducting magnet. The welding assembly also includes a welding part and a driving part. The driving part drives the welding part to weld the external connector placed on the welding bearing surface.

[0009] The high-temperature superconducting magnetic external joint welding device according to this utility model has at least the following beneficial effects:

[0010] By clamping and fixing the high-temperature superconducting magnet vertically onto a fixture, and with a welding bearing surface provided at the top of the lower mold, the welding bearing surface is arranged parallel to the axis of the vertically positioned high-temperature superconducting magnet. This allows a small section of superconducting tape from the outermost coil of two adjacent coils to be placed horizontally on the top surface of the lower mold without bending or other operations. Because the two sections of superconducting tape are parallel to each other and staggered along the axis of the high-temperature superconducting magnet, a superconducting bridging strip needs to be placed on the top surface of the lower mold to connect the two sections of superconducting tape. Solder is then placed between each section of superconducting tape and the superconducting bridging strip. The drive unit is then activated to press the welding unit down. After the welding unit comes into contact with the entire assembly consisting of the two sections of superconducting tape, the superconducting bridging strip, and the solder, the welding unit is heated to the set welding temperature. Then, under the continuous downward pressure of the driving unit, the welding part applies a set welding pressure to the whole consisting of two small sections of superconducting tape, superconducting bridging tape and brazing filler metal. After holding the temperature and pressure for a set time, the brazing filler metal melts and flows into the connection gap between the superconducting tape and the superconducting bridging tape, and after solidification, an external joint is formed. Throughout the welding process, the downward pressure direction of the welding part is perpendicular to the direction of the superconducting tape, ensuring that the lower end face of the welding part is consistent with the direction of the superconducting tape. This allows the superconducting tape to be in a horizontal state during welding without twisting the direction of the superconducting tape. This reduces damage to the superconducting tape, avoids the loss of brazing filler metal due to gravity, improves welding quality and efficiency, and ensures the quality of the external joint. It is particularly suitable for the intelligent and standardized production of external joint welding in the manufacturing process of high-temperature superconducting magnets. Meanwhile, because the welding part is pressed against the entire assembly consisting of two small sections of superconducting tape, superconducting bridging tape and brazing filler metal during the process of welding the external joint, the lower mold provides stable support for the entire assembly consisting of two small sections of superconducting tape, superconducting bridging tape and brazing filler metal. Therefore, it can effectively avoid the pressure directly acting on the high-temperature superconducting magnet and affecting its performance.

[0011] In one optional embodiment, the driving unit is configured as a servo electric cylinder, which is located at the upper end of the bracket, and the welding unit is connected to the moving end of the servo electric cylinder and is driven by the servo electric cylinder to move in the vertical direction.

[0012] In one optional embodiment, the welding section includes a heating plate, in which a heating rod and a temperature sensor are disposed, the temperature sensor being disposed at the end of the heating rod facing the lower mold; both the temperature sensor and the heating rod are electrically connected to the control system.

[0013] And / or, a pressure sensor is provided between the moving end of the servo electric cylinder and the welding part, and both the pressure sensor and the servo electric cylinder are electrically connected to the control system.

[0014] In one alternative embodiment, the lower mold further includes a limiting component for limiting the external connector.

[0015] In one optional embodiment, the limiting component includes connecting lugs respectively disposed at both ends of the lower mold along the length direction of the lower mold, the connecting lugs being threadedly connected to clamping bolts, the clamping bolts having a first state of pressing the outer connector against the welding bearing surface, and a second state of being separated from the outer connector.

[0016] In one optional embodiment, a rotation adjustment component is further included, which is disposed on the worktable and is used to drive the clamp to rotate about the axis of the high-temperature superconducting magnet in a vertical position.

[0017] In one alternative embodiment, the clamp includes:

[0018] A fixed support is provided on the workbench;

[0019] A support column is rotatably mounted on the upper end of the fixed support and is driven to rotate by the rotation adjustment assembly. The outer side wall of the end of the support column opposite to the fixed support is provided with a threaded portion.

[0020] A limiting part is provided at the lower end of the fixed support, and the limiting part is used to embed the outer peripheral concave ring of the high-temperature superconducting magnet in a vertical state; the outer peripheral concave ring of the high-temperature superconducting magnet in a vertical state can rotate relative to the limiting part;

[0021] The clamping part has a threaded hole inside that matches the threaded part. The end face of the clamping part facing the fixed support has a limiting platform that matches the center hole of the high-temperature superconducting magnet.

[0022] In one optional embodiment, the support column is rotatably mounted on the fixed support, and the outer peripheral concave ring of the high-temperature superconducting magnet in a vertical position can rotate relative to the limiting part. The rotation adjustment assembly includes:

[0023] The mounting housing is disposed at one end of the fixed support away from the clamping part;

[0024] The worm gear is rotatably connected to the mounting housing;

[0025] A handwheel is located at one end of the worm gear extending outside the mounting housing;

[0026] The worm gear is rotatably disposed within the mounting housing and meshes with the worm; the end of the support column opposite to the clamping part extends to the outside of the fixed support and is coaxially connected with the worm gear.

[0027] In one optional embodiment, a moving component is provided on the worktable, and the clamp is disposed at the moving end of the moving component. The clamp is driven by the moving component to move along the axial direction of the high-temperature superconducting magnet in a vertical state.

[0028] In one alternative implementation, the moving component includes:

[0029] The ball screw is rotatably mounted on the worktable;

[0030] A servo motor is connected to one end of the ball screw and drives the ball screw to rotate; the servo motor is connected to the control system.

[0031] A ball screw nut is disposed on the ball screw;

[0032] A sliding platform is disposed on the ball screw nut and is slidably disposed on the worktable along the axial direction of the high-temperature superconducting magnet in a vertical state; the fixture is disposed on the sliding platform. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a three-dimensional structural diagram of a high-temperature superconducting magnet external connector welding device according to an embodiment of the present invention, which clamps a high-temperature superconducting magnet in a vertical position.

[0035] Figure 2 for Figure 1 A structural diagram showing the control system after disassembly;

[0036] Figure 3 This is a schematic diagram of the welding assembly in a high-temperature superconducting magnet external connector welding device according to an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the present invention, in which the whole consisting of two small sections of superconducting tape, superconducting bridging tape and brazing filler metal is placed horizontally on the top surface of the lower mold.

[0038] Figure 5 This is a schematic diagram of the structure of the moving component in an embodiment of the present utility model;

[0039] Figure 6 for Figure 5 Another structural diagram from a different perspective;

[0040] Figure 7 This is a schematic diagram of the assembly structure of the rotation adjustment component, the clamp, and the high-temperature superconducting magnet in a vertical position in an embodiment of this utility model.

[0041] Figure 8 for Figure 7 A schematic diagram of the decomposed structure;

[0042] Figure 9 This is a schematic diagram of the structure of the rotation adjustment component in an embodiment of this utility model.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100 - High-temperature superconducting magnet, 110 - Outer peripheral concave ring, 120 - Superconducting tape, 130 - Superconducting bridging tape;

[0045] 200 - Mounting frame; 210 - Workbench;

[0046] 300-Clamp, 310-Fixed support, 320-Support column, 330-Threaded part, 340-Limiting part, 350-Clamping part, 351-Threaded hole, 352-Limiting platform, 353-Hand-grip knob, 354-Rubber sleeve;

[0047] 400-Welding assembly, 410-Bracket, 420-Lower mold, 421-Connecting ear, 422-Clamping bolt, 430-Servo electric cylinder, 440-Pressure sensor, 451-Heating plate, 452-Heating rod, 453-Temperature sensor, 454-Connecting plate;

[0048] 510 - Mounting housing, 520 - Worm gear, 530 - Handwheel, 540 - Worm wheel;

[0049] 600-Moving component, 610-Ball screw, 620-Servo motor, 630-Ball screw nut, 640-Sliding platform, 650-Guide rail, 660-Slider, 670-Coupling, 681 Fixed base, 682-BF support base, 690-Padded block;

[0050] 700-Control System. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0052] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this embodiment. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of this embodiment, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment according to the specific circumstances.

[0054] The following is combined with Figures 1 to 9 The following describes embodiments of the present invention.

[0055] A welding device for the outer connector of a high-temperature superconducting magnet, according to an embodiment of the present invention, is used for welding the outer connector of a high-temperature superconducting magnet 100. The welding device includes a worktable 210 and a welding assembly 400. A clamp 300 is provided on the worktable 210 for clamping the high-temperature superconducting magnet 100 in a vertical position. The welding assembly 400 includes a support 410, which is located above the worktable 210. A lower mold 420 is provided at the lower end of the support 410. A welding bearing surface is provided at the top of the lower mold 420. The arrangement direction of the welding bearing surface is parallel to the axial direction of the high-temperature superconducting magnet 100 in a vertical position. The lower mold 420 is used for horizontally placing the outer connector of the high-temperature superconducting magnet 100. The welding assembly 400 also includes a welding part and a driving part. The driving part drives the welding part to weld the outer connector placed on the welding bearing surface.

[0056] In this embodiment, the welding device clamps and fixes the high-temperature superconducting magnet 100 vertically onto the fixture 300. The top of the lower mold 420 has a welding bearing surface, the arrangement direction of which is parallel to the axial direction of the vertically positioned high-temperature superconducting magnet 100. This allows a small section of superconducting strip 120 from the outermost coil of two adjacent coils to be placed horizontally on the top surface of the lower mold 420 without bending or other operations. Figure 4As shown, since the two short superconducting strips 120 are parallel to each other and offset along the axial direction of the high-temperature superconducting magnet 100, a superconducting bridging strip 130 needs to be placed on the top surface of the lower mold 420. The superconducting bridging strip 130 connects the two short superconducting strips 120, and brazing filler metal is placed between each superconducting strip 120 and the superconducting bridging strip 130. Then, the drive unit is activated to drive the welding unit to press down. After the welding unit abuts against the whole composed of the two short superconducting strips 120, the superconducting bridging strip 130, and the brazing filler metal, the welding unit is heated to the set welding temperature. Then, under the continuous pressing force of the drive unit, the welding unit applies the set welding pressure to the whole composed of the two short superconducting strips 120, the superconducting bridging strip 130, and the brazing filler metal. After holding the temperature and pressure for the set time, the brazing filler metal melts and flows into the superconducting magnet 100. In the connection gap between the superconducting strip 120 and the superconducting bridging strip 130, through wetting and diffusion, the superconducting strip 120 and the superconducting bridging strip 130 are firmly bonded together after the brazing filler metal solidifies to form an external joint. During the entire welding process, the downward pressing direction of the welding part is perpendicular to the direction of the superconducting strip 120, ensuring that the lower end face of the welding part is consistent with the direction of the superconducting strip 120. This allows the superconducting strip 120 to be kept horizontal during welding without twisting its direction, which reduces damage to the superconducting strip 120, avoids brazing filler metal loss due to gravity, improves welding quality and efficiency, and ensures the quality of the external joint. This method is particularly suitable for the intelligent and standardized production of external joint welding in the manufacturing process of high-temperature superconducting magnets 100. Meanwhile, because the welding part abuts and applies pressure during the process of preparing the external joint by the whole consisting of two small sections of superconducting strip 120, superconducting bridging strip 130 and brazing filler metal, the lower mold 420 provides stable support for the whole consisting of two small sections of superconducting strip 120, superconducting bridging strip 130 and brazing filler metal. Therefore, it can effectively avoid the pressure directly acting on the magnet skeleton of the high-temperature superconducting magnet 100 and affecting the performance of the high-temperature superconducting magnet 100.

[0057] It should be noted that the external connector mentioned in this embodiment includes a small section of superconducting tape 120 on the outermost ring of two adjacent coils, a superconducting bridging tape 130 connecting the two small sections of superconducting tape 120, and solder filling the gap between the superconducting tape 120 and the superconducting bridging tape 130. Specifically, in the process of welding and preparing the external connector, the superconducting tape 120 and the superconducting bridging tape 130 to be welded are cleaned with ethanol or acetone to remove the surface oxide layer and flux is applied; the superconducting bridging tape 130 is first placed horizontally on the top surface of the lower mold 420, then two sheet-like solders are placed on the top surface of the superconducting bridging tape 130, and then the two small sections of superconducting tape 120 are placed horizontally on the top surface of the corresponding sheet-like solders.

[0058] It should be noted that after the outer joint is prepared by welding, it can be easily removed from the lower mold 420.

[0059] It should be noted that, because during the welding process using the welding device of this embodiment, the downward-pressed welding part does not twist the direction of the superconducting strip 120, and the superconducting strip 120 and the superconducting bridging strip 130 are in a horizontal state during welding, the brazing filler metal can be prevented from being lost due to gravity. Therefore, the external joint prepared by welding using the welding device of this embodiment has the characteristics of low resistance, high mechanical strength, stable performance and smooth surface.

[0060] It is understood that the high-temperature superconducting magnet 100 in a vertical position is arranged perpendicular to the horizontal plane. The axial direction, vertical direction, and length direction of the high-temperature superconducting magnet 100 in a vertical position mentioned in this text are mutually perpendicular to each other, and the axial direction of the high-temperature superconducting magnet 100 in a vertical position is located on the same horizontal plane as the arrangement direction of the lower mold 420. For ease of description, this embodiment uses... Figure 2 The axial direction, vertical direction, and first direction are described as the axial direction, vertical direction, and length direction of the high-temperature superconducting magnet 100 in a vertical state, respectively. However, they should not be construed as explicitly defining the axial direction of the high-temperature superconducting magnet 100 in a vertical state and the length direction of the lower mold 420.

[0061] It is understandable that the superconducting tape 120 is quite sensitive to temperature, and the welding temperature is usually below 200℃.

[0062] Specifically, the welding apparatus also includes a mounting frame 200, a worktable 210 disposed at the lower end of the mounting frame 200, and a bracket 410 disposed at the upper end of the mounting frame 200. More specifically, the bracket 410 is fixed to the mounting frame 200 by bolts.

[0063] like Figure 2 and Figure 3 As shown, in some embodiments, the lower mold 420 is located directly below the welding section, and the driving unit is a servo cylinder 430. The servo cylinder 430 is located at the upper end of the support 410, and the welding section is connected to the moving end of the servo cylinder 430 and driven by the servo cylinder 430 to move vertically. With this arrangement, the welding operation of the external joint can be realized by controlling the extension and retraction of the moving end of the servo cylinder 430. The structure is simple and the servo cylinder 430 has high precision in controlling the welding pressure.

[0064] In specific applications, the driving component can also be set as a welding robot, with the welding part located at the end of the welding robot. The welding robot drives the welding part to approach the lower mold 420 and welds the outer joint located on the lower mold 420.

[0065] like Figure 2 and Figure 3As shown, specifically, a pressure sensor 440 is installed between the moving end of the servo cylinder 430 and the welding part. Both the pressure sensor 440 and the servo cylinder 430 are electrically connected to the control system 700. The pressure sensor 440 monitors the pressure applied to the welding part on the entire assembly consisting of two short sections of superconducting strip 120, superconducting bridging strip 130, and brazing filler metal. The measured pressure value is transmitted to the control system 700. When the measured pressure value is less than the set welding pressure value, a first signal is transmitted to increase the loading of the servo cylinder 430; when the measured pressure value is greater than the set welding pressure value, a second signal is transmitted to decrease the loading of the servo cylinder 430. This achieves precise control of the welding pressure, thereby ensuring the welding quality of the external joint. It is particularly suitable for the intelligent and standardized production of external joint welding in the manufacturing process of high-temperature superconducting magnets 100.

[0066] It should be noted that during the welding process of the external connector, when the welding part first comes into contact with the entire assembly consisting of two small sections of superconducting tape 120, superconducting bridging tape 130, and brazing filler metal, a small pre-pressure is applied. Then, under pressure holding conditions, the temperature of the welding part is raised to the set welding temperature. Then, the output load of the servo cylinder 430 is increased so that the pressure applied by the welding part to the entire assembly consisting of the two small sections of superconducting tape 120, superconducting bridging tape 130, and brazing filler metal reaches the set welding pressure. After the external connector is prepared by holding the temperature and pressure for a set time, the welding part is lifted upwards, and finally the external connector is removed from the lower mold 420. The external connector prepared by this welding method has the characteristics of low resistance, high mechanical strength, stable performance, and smooth surface.

[0067] like Figure 3 As shown, specifically, a connecting plate 454 is provided between the pressure sensor 440 and the welding part. The cross-sectional area of ​​the connecting plate 454 perpendicular to the vertical direction is larger than the cross-sectional area of ​​the pressure sensor 440 perpendicular to the vertical direction, and the cross-sectional area of ​​the connecting plate 454 perpendicular to the vertical direction is larger than the cross-sectional area of ​​the welding part perpendicular to the vertical direction. This makes the pressure value measured by the pressure sensor 440 more accurately reflect the actual pressure value applied by the welding part to the whole composed of two small sections of superconducting strip 120, superconducting bridging strip 130 and brazing filler metal.

[0068] To improve the stability of the welding part's vertical linear lifting, specifically, the support 410 is provided with a slide rail (not shown in the figure) on the side wall facing the welding part, and the connecting plate 454 is slidably mounted on the slide rail.

[0069] like Figure 3As shown, in some embodiments, the welding part includes a heating plate 451, and a heating rod 452 and a temperature sensor 453 are disposed inside the heating plate 451. The temperature sensor 453 is disposed at the end of the heating rod 452 facing the lower mold 420; both the temperature sensor 453 and the heating rod 452 are electrically connected to the control system 700. When the heating plate 451 descends to just make contact with the entire assembly consisting of two small sections of superconducting tape 120, superconducting bridging tape 130, and brazing filler metal, and the pressure application stops, the heating rod 452 is activated to heat the heating plate 451, causing the temperature of the heating plate 451 to gradually increase. At the same time, the temperature sensor 453 detects the temperature of the end of the heating plate 451 that is relatively close to the lower mold 420 in real time and feeds it back to the control system 700. When the temperature of the end of the heating plate 451 that is relatively close to the lower mold 420 reaches the set welding temperature, the heating power of the heating rod 452 is controlled to ensure that the temperature of the end of the heating plate 451 that is relatively close to the lower mold 420 is precisely maintained at the set welding temperature, thereby achieving precise control of the welding temperature and ensuring the welding quality of the external joint. This is particularly suitable for the intelligent and standardized production of external joint welding in the manufacturing process of high-temperature superconducting magnet 100.

[0070] It is understandable that, during the welding process using the welding apparatus of this embodiment, the heating plate 451 heats and welds the entire assembly consisting of two small sections of superconducting tape 120, superconducting bridging tape 130, and brazing filler metal by relying on the end of the heating plate 451 that is relatively close to the lower mold 420. Therefore, by monitoring the temperature of the end of the heating plate 451 that is relatively close to the lower mold 420 in real time by the temperature sensor 453, the welding temperature can be controlled more precisely.

[0071] Specifically, the heating plate 451 is provided with a first mounting hole and a second mounting hole corresponding to the positions of the heating rod 452 and the temperature sensor 453, respectively. The heating rod 452 is disposed in the first mounting hole and the temperature sensor 453 is disposed in the second mounting hole.

[0072] Specifically, the control system 700 includes a display screen, which displays the pressure value fed back in real time by the pressure sensor 440 and the temperature value fed back in real time by the temperature sensor 453, so that the operator can observe them in real time.

[0073] In specific applications, the lower mold 420 and the heating plate 451 are made of materials that are not sensitive to contact with the brazing filler metal (such as stainless steel or aluminum alloy), which facilitates the cleaning of any escaping brazing filler metal. The side of the heating plate 451 that contacts the superconducting strip 120 is specially treated to meet the requirements for flatness of the welding surface.

[0074] In some embodiments, the lower mold 420 further includes a limiting component for limiting the external connector; after the entire assembly consisting of two small sections of superconducting tape 120, superconducting bridging tape 130 and brazing filler metal is horizontally placed on the top surface of the lower mold 420, the limiting component is used to press the areas of the two small sections of superconducting tape 120 that do not contact the welding part against the lower mold 420. When the welding part descends and abuts against the entire assembly consisting of the two small sections of superconducting tape 120, superconducting bridging tape 130 and brazing filler metal, displacement of the two small sections of superconducting tape 120 relative to the lower mold 420 is effectively prevented, ensuring the welding preparation quality of the external connector.

[0075] like Figure 3 and Figure 4 As shown, specifically, the limiting assembly includes connecting ears 421 respectively disposed at both ends of the lower mold 420 along the length direction of the lower mold 420. The connecting ears 421 are threadedly connected to clamping bolts 422. The clamping bolts 422 have a first state of pressing the outer connector against the welding bearing surface, and a second state of separating from the outer connector. After the entire assembly consisting of two small sections of superconducting tape 120, a superconducting bridging tape 130, and brazing filler metal is horizontally placed on the welding bearing surface of the lower mold 420, the two clamping bolts 422 are switched from the second state to the first state, so that the two clamping bolts 422 respectively press the areas of the two small sections of superconducting tape 120 that are not in contact with the welding part. When the welding section descends and comes into contact with the entire assembly consisting of two small sections of superconducting tape 120, superconducting bridging tape 130, and brazing filler metal in the lower mold 420, displacement of the two small sections of superconducting tape 120 relative to the lower mold 420 is effectively prevented, ensuring the welding quality of the external joint. At the same time, after the welding of one external joint is completed, the two clamping bolts 422 can be switched from the first state to the second state so that the prepared external joint can be removed from the lower mold 420. Then, the entire assembly consisting of two small sections of superconducting tape 120, superconducting bridging tape 130, and brazing filler metal is placed on the top surface of the lower mold 420 to be welded for the next external joint welding preparation operation.

[0076] In some embodiments, a rotation adjustment component is also included. The rotation adjustment component is disposed on the worktable 210 and is used to drive the fixture 300 to rotate about the axis of the high-temperature superconducting magnet 100 in a vertical position. After the high-temperature superconducting magnet 100 is clamped and fixed in a vertical position on the fixture 300, if the whole assembly consisting of two small sections of superconducting strip 120, superconducting bridging strip 130 and brazing filler metal cannot be placed horizontally on the top surface of the lower mold 420 due to clamping errors, the high-temperature superconducting magnet 100 is driven to rotate and finely adjust together with the fixture 300 by the rotation adjustment component until it is ensured that the whole assembly consisting of two small sections of superconducting strip 120, superconducting bridging strip 130 and brazing filler metal can be placed horizontally on the top surface of the lower mold 420. This reduces the difficulty of clamping and fixing the high-temperature superconducting magnet 100 in a vertical position on the fixture 300 and ensures that the high-temperature superconducting magnet 100 is adjusted to the optimal welding position, thereby improving welding efficiency and welding quality.

[0077] like Figure 7 and Figure 8As shown, specifically, the clamp 300 includes a fixed support 310 and a clamping part 350. The fixed support 310 is disposed on the worktable 210. A support column 320 is rotatably disposed on the upper end of the fixed support 310. The support column 320 is driven to rotate by a rotation adjustment component. A threaded part 330 is disposed on the outer side wall of the end of the support column 320 opposite to the fixed support 310. A limiting part 340 is disposed on the lower end of the fixed support 310. The limiting part 340 is used to embed the outer peripheral concave ring 110 of the high-temperature superconducting magnet 100 in a vertical state. The outer peripheral concave ring 110 of the high-temperature superconducting magnet 100 in a vertical state can rotate relative to the limiting part 340. The clamping part 350 is provided with a threaded hole 351 that matches the threaded part 330. A limiting platform 352 protrudes from the end face of the clamping part 350 toward the fixed support 310. The limiting platform 352 matches the center hole of the high-temperature superconducting magnet 100. Because the diameter of the central hole of the high-temperature superconducting magnet 100 is larger than the outer diameter of the support column 320, the central hole of the vertically positioned high-temperature superconducting magnet 100 can be first inserted axially into the support column 320. At this time, the center of the central hole of the vertically positioned high-temperature superconducting magnet 100 is located directly above the center of the support column 320. Subsequently, after moving the vertically positioned high-temperature superconducting magnet 100 axially to directly above the limiting part 340, the vertically positioned high-temperature superconducting magnet 100 is lowered, causing the outer peripheral concave ring 110 of the vertically positioned high-temperature superconducting magnet 100 to lock. The center of the central hole of the high-temperature superconducting magnet 100, which is in a vertical position, is embedded in the limiting part 340. The projection of the center of the central hole of the supporting column 320 along the axial direction overlaps. Then, the limiting platform 352 is inserted into the central hole of the high-temperature superconducting magnet 100 and threaded to the clamping part 350. It is pressed against the end face of the high-temperature superconducting magnet 100 in a vertical position away from the fixed support 310. This allows the high-temperature superconducting magnet 100 to be clamped and fixed in a vertical position in the clamp 300. The entire clamp 300 has a simple structure, occupies little space, and is convenient for clamping, fixing and removing the high-temperature superconducting magnet 100.

[0078] To facilitate the rotation of the clamping part 350 relative to the support column 320 for tightening or loosening, such as Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, specifically, a hand-held knob 353 is provided on the end face of the clamping part 350 opposite to the limiting platform 352.

[0079] To avoid scratching the wall of the central hole of the high-temperature superconducting magnet 100, such as Figure 8 As shown, specifically, the limiting platform 352 is covered with a rubber sleeve 354.

[0080] like Figures 7 to 9As shown, specifically, the rotary adjustment assembly includes a mounting housing 510, a worm gear 520, a handwheel 530, and a worm wheel 540. The mounting housing 510 is disposed at one end of the fixed support 310 away from the clamping part 350; the worm gear 520 is rotatably connected to the mounting housing 510; the handwheel 530 is disposed at one end of the worm gear 520 extending outside the mounting housing 510; the worm wheel 540 is rotatably disposed inside the mounting housing 510 and meshes with the worm gear 520; the support column 320 extends from one end away from the clamping part 350 to the outside of the fixed support 310 and is coaxially connected with the worm wheel 540. After the high-temperature superconducting magnet 100 is clamped and fixed vertically on the fixture 300, if the operator observes that the entire assembly consisting of two small sections of superconducting strip 120, superconducting bridging strip 130, and brazing filler metal cannot be placed horizontally on the top surface of the lower mold 420, the operator can use the handwheel 530 to rotate the worm gear 520. This rotation, achieved through a transmission assembly consisting of the worm gear 520 and worm wheel 540 with a large transmission ratio, causes the support column 320 to rotate around the axial axis. This causes the high-temperature superconducting magnet 100 to rotate and be finely adjusted along with the support column 320 until the entire assembly consisting of the two small sections of superconducting strip 120, superconducting bridging strip 130, and brazing filler metal can be placed horizontally on the top surface of the lower mold 420. This reduces the difficulty of clamping and fixing the high-temperature superconducting magnet 100 vertically on the fixture 300 while ensuring that the high-temperature superconducting magnet 100 is precisely adjusted to the optimal welding position, thereby improving welding efficiency and welding quality. Meanwhile, due to the varying levels of skill among different operators, the degree to which the high-temperature superconducting magnet 100 deviates from the optimal welding position varies when it is clamped and fixed vertically on the fixture 300. Compared to adjusting the rotation of the high-temperature superconducting magnet 100 through automatic control, this embodiment allows for more flexible adjustment based on different working conditions through manual means, ensuring that the high-temperature superconducting magnet 100 is quickly adjusted to the optimal welding position.

[0081] like Figure 1 and Figure 2As shown, in some embodiments, a moving component 600 is provided on the worktable 210, and a clamp 300 is provided at the moving end of the moving component 600. The clamp 300 is driven by the moving component 600 to move along the axial direction of the high-temperature superconducting magnet 100, which is in a vertical state. Because the high-temperature superconducting magnet 100 is usually composed of at least three coils stacked together, that is, the high-temperature superconducting magnet 100 has at least two external joints, and multiple external joints are located on the same straight line along the axial direction, on the one hand, after the welding preparation of one external joint is completed and the external joint is removed from the lower mold 420, the moving component 600 drives the clamp 300 and the high-temperature superconducting magnet 100 to move along the axial direction by a set distance, so that another component to be welded, consisting of two small sections of superconducting strip 120, superconducting bridging strip 130 and brazing filler metal, is accurately moved to the position of the corresponding lower mold 420 for the welding preparation of the next external joint. Thus, multiple external joints of the high-temperature superconducting magnet 100 can be welded with only one clamping, resulting in high welding efficiency. On the other hand, after all the external joint welding preparation work is completed, the moving assembly 600 moves the clamp 300 and the high-temperature superconducting magnet 100 to the outermost side of the worktable 210 (i.e. not directly below the support 410) so that the high-temperature superconducting magnet 100 can be clamped and disassembled.

[0082] like Figure 5 and Figure 6 As shown, specifically, the moving component 600 includes a ball screw 610, which is rotatably mounted on the worktable 210. One end of the ball screw 610 is connected to a servo motor 620 via a coupling 670. The servo motor 620 drives the ball screw 610 to rotate and is connected to the control system 700. The ball screw 610 is provided with a ball screw nut 630. The ball screw nut 630 is provided with a sliding platform 640, which is slidably mounted on the worktable 210 along the axial direction of the vertically positioned high-temperature superconducting magnet 100. The fixture 300 is mounted on the sliding platform 640. Using the servo motor 620 as the driving power source, and with the servo motor 620 operating under the control signal output by the control system 700, the axial position adjustment and control of the fixture 300 and the high-temperature superconducting magnet 100 are more precise. This enables accurate and rapid positioning of any external joint welding position, improving welding efficiency and the performance of the welded external joint.

[0083] Specifically, the worktable 210 is provided with BK fixed seat 681 and BF support seat 682 at intervals along the axial direction. The BF support seat 682 is located on the side of BK fixed seat 681 away from the servo motor 620. The two ends of the ball screw 610 are rotatably connected to BK fixed seat 681 and BF support seat 682 respectively.

[0084] It should be noted that BK fixed seat 681 refers to a ball screw support seat in the BK series, used to fix the ball screw and ensure that the ball screw maintains stability and high precision during operation; BF support seat refers to a standard type of ball screw support seat, used to support the ball screw and ensure that the ball screw maintains stability and high precision during operation.

[0085] Specifically, the control system 700 includes a pulse-type servo motor controller and a temperature controller.

[0086] To improve the smoothness and stability of the axial movement of the sliding platform 640, the moving assembly 600 further includes two guide rails 650, which are arranged opposite to each other on both sides of the ball screw 610. The sliding platform 640 is slidably mounted on the guide rails 650 via a slider 660.

[0087] More specifically, a pad 690 is provided between the guide rail 650 and the worktable 210.

[0088] Specifically, the fixed support 310 is fixed to the sliding platform 640 by bolts.

[0089] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the appended invention.

Claims

1. A welding device for the external connector of a high-temperature superconducting magnet, used for welding the external connector of a high-temperature superconducting magnet (100), characterized in that, The welding apparatus includes: Workbench (210); A clamp (300) is provided on the worktable (210) and is used to clamp a high-temperature superconducting magnet (100) in a vertical position; The welding assembly (400) includes a bracket (410) disposed above the worktable (210). A lower mold (420) is disposed on the bracket (410). A welding bearing surface is disposed at the top of the lower mold (420). The arrangement direction of the welding bearing surface is parallel to the axis of the high-temperature superconducting magnet (100) in a vertical position. The welding bearing surface is used for horizontal placement of the outer connector of the high-temperature superconducting magnet (100). The welding assembly (400) also includes a welding part and a driving part. The driving part drives the welding part to weld the outer connector placed on the welding bearing surface.

2. The high-temperature superconducting magnet external joint welding device according to claim 1, characterized in that, The driving unit is configured as a servo electric cylinder (430), which is located at the upper end of the bracket (410). The welding part is connected to the moving end of the servo electric cylinder (430) and is driven by the servo electric cylinder (430) to move in the vertical direction.

3. The high-temperature superconducting magnet external joint welding device according to claim 2, characterized in that, The welding section includes a heating plate (451), and a heating rod (452) and a temperature sensor (453) are disposed inside the heating plate (451). The temperature sensor (453) is disposed at the end of the heating rod (452) facing the lower mold (420). Both the temperature sensor (453) and the heating rod (452) are electrically connected to the control system (700). And / or, a pressure sensor (440) is provided between the moving end of the servo electric cylinder (430) and the welding part, and both the pressure sensor (440) and the servo electric cylinder (430) are electrically connected to the control system (700).

4. The high-temperature superconducting magnet external joint welding device according to claim 1, characterized in that, The lower mold (420) also includes a limiting component for limiting the external connector.

5. The high-temperature superconducting magnet external joint welding device according to claim 4, characterized in that, The limiting component includes connecting ears (421) respectively disposed at both ends of the lower mold (420) along the length direction of the lower mold (420). The connecting ears (421) are threadedly connected with clamping bolts (422). The clamping bolts (422) have a first state of pressing the outer connector against the welding bearing surface and a second state of being separated from the outer connector.

6. The high-temperature superconducting magnet external joint welding device according to claim 1, characterized in that, It also includes a rotation adjustment component, which is disposed on the worktable (210) and is used to drive the fixture (300) to rotate about the axis of the high-temperature superconducting magnet (100) in a vertical position.

7. The high-temperature superconducting magnet external joint welding device according to claim 6, characterized in that, The clamp (300) includes: A fixed support (310) is provided on the workbench (210); A support column (320) is rotatably disposed on the upper end of the fixed support (310) and driven to rotate by the rotation adjustment assembly. A threaded portion (330) is provided on the outer side wall of the end of the support column (320) facing away from the fixed support (310). A limiting part (340) is provided at the lower end of the fixed support (310). The limiting part (340) is used to embed the outer peripheral concave ring (110) of the high-temperature superconducting magnet (100) in a vertical state. The outer peripheral concave ring (110) of the high-temperature superconducting magnet (100) in a vertical state can rotate relative to the limiting part (340). The clamping part (350) has a threaded hole (351) inside that matches the threaded part (330). The clamping part (350) has a limiting platform (352) protruding from its end face toward the fixed support (310). The limiting platform (352) matches the center hole of the high-temperature superconducting magnet (100).

8. The high-temperature superconducting magnet external joint welding device according to claim 7, characterized in that, The rotation adjustment component includes: The mounting housing (510) is disposed at one end of the fixed support (310) away from the clamping part (350); The worm gear (520) is rotatably connected to the mounting housing (510); A handwheel (530) is disposed at one end of the worm gear (520) extending outside the mounting housing (510); The worm gear (540) is rotatably disposed inside the mounting housing (510) and meshes with the worm (520); the end of the support column (320) opposite to the clamping part (350) extends to the outside of the fixed support (310) and is coaxially connected with the worm gear (540).

9. A high-temperature superconducting magnet external joint welding device according to any one of claims 1 to 8, characterized in that, The worktable (210) is provided with a moving component (600), and the clamp (300) is provided at the moving end of the moving component (600). The clamp (300) is driven by the moving component (600) to move along the axial direction of the high-temperature superconducting magnet (100) in a vertical state.

10. A high-temperature superconducting magnet external joint welding device according to claim 9, characterized in that, The moving component (600) includes: A ball screw (610) is rotatably mounted on the worktable (210); A servo motor (620) is connected to one end of the ball screw (610) and drives the ball screw (610) to rotate; the servo motor (620) is connected to the control system (700); A ball screw nut (630) is disposed on the ball screw (610); A sliding platform (640) is disposed on the ball screw nut (630) and is slidably disposed on the worktable (210) along the axial direction of the high-temperature superconducting magnet (100) in a vertical state; the fixture (300) is disposed on the sliding platform (640).

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