A strip joint welding device for pancake coils

Abstract

The present application relates to the technical field of high-temperature superconducting material welding, and provides a strip joint welding device for pancake coils, including a support assembly and a welding assembly, the welding assembly is fixed on a moving mechanism, and can move along the X-axis or Y-axis of a plane coordinate system established according to the surface of the pancake coil, the welding assembly includes a base plate, a rotary welding assembly and a vertical guide rail, the vertical guide rail is vertically arranged with the plane coordinate system, and the rotary welding assembly can move along the vertical guide rail; the rotary welding assembly is provided with a fastening structure, the rotary welding assembly can rotate around the fastening structure, and is locked in position by the fastening structure. The present application uses a rotatable welding assembly to weld the pancake coil strip joint, the rotary welding assembly can move freely along the spatial rectangular coordinate system through the moving mechanism, can quickly locate the position of the joint to be welded, can adjust the welding angle and welding pressure at any time, and ensure the uniformity and mechanical properties of multiple strip joints after welding.

Description

Technical Field

[0001] The present application relates to the technical field of high-temperature superconducting material welding, and in particular to a strip joint welding device for pancake coils. Background Art

[0002] The superconducting pancake coil is an electromagnetic coil made of high-temperature superconducting materials, named for its shape similar to a flat disk. This coil has the characteristic of zero resistance in the superconducting state, so there is almost no heat loss when current passes through it. It is widely used in equipment such as magnetic resonance imaging (MRI), particle accelerators and superconducting current limiters in power systems.

[0003] In the winding process of high-temperature superconducting coils, pancake coils are a common structure. They are composed of two flat discs wound with superconducting tapes, stacked up and down to form a double pancake structure. The winding process of the pancake coil has a significant impact on its performance. For example, different winding diameters will lead to large differences in the current carrying capacity of the coil. During the winding process, it is necessary to strictly control the relevant process details to avoid the occurrence of strip kinking, misalignment and sharp corners, and ensure the uniformity and reliability of the coil winding. Among them, the welding quality of the pancake coil joint is particularly important. After welding, the pancake coil joint must have good electrical and mechanical properties and consistent uniformity. If the welding quality cannot be guaranteed, it will seriously affect the stability and reliability of the superconducting coil.

[0004] In the prior art, there are two main methods for welding pancake coil joints, manual welding and machine tool welding. Due to differences in welding technology, manual welding is difficult to ensure the uniformity and mechanical properties of pancake coil joints. When welding with machine tooling, since the joints of multiple pancake coils have different positions and sometimes inconsistent directions, the machine tooling cannot meet the welding requirements of multiple pancake coil joints at the same time. It is necessary to constantly adjust the tooling position to weld one by one. It takes a lot of time and manpower to adjust the tooling, and the welding efficiency is low. During the welding process, the welding temperature and pressure are also difficult to control. There are differences in the welding temperature and pressure of multiple joints of the same coil. In addition, changes in the welding position cause the welding clamping point to have different shapes and cannot be adjusted.

[0005] It can be seen that the existing welding method cannot guarantee the quality of the joint welding between pancake coils, the temperature and pressure required for welding cannot be standardized, and the welding quality and controllability cannot be continued. Summary of the invention

[0006] The purpose of the present application is to provide a strip joint welding device for pancake coils to solve the technical problems in the prior art that the quality of joint welding between pancake coils cannot be guaranteed, the temperature and pressure required for welding cannot be standardized, and the welding quality and controllability cannot be sustained.

[0007] Based on this, the present application provides a strip joint welding device for a pancake coil, comprising: a support assembly, which is detachably fixed on the magnet skeleton of the pancake coil; the support assembly is provided with a moving mechanism, and the moving mechanism can move along the X-axis or Y-axis of the plane coordinate system established according to the surface of the pancake coil; a welding assembly, which is fixed on the moving mechanism, includes a base plate, a rotary welding assembly and a vertical guide rail, the vertical guide rail is fixed on the base plate, the rotary welding assembly is connected to the vertical guide rail, and the rotary welding assembly can move along the vertical guide rail; the rotary welding assembly is provided with a fastening structure, the rotary welding assembly can rotate around the fastening structure, and is locked in position by the fastening structure; the vertical guide rail is arranged perpendicular to the plane coordinate system, and the base plate is fixedly connected to the moving mechanism.

[0008] In one possible implementation, the rotary welding assembly also includes: a clamping mechanism, including a clamping handle and a pressure sensor, the pressure sensor is fixed at one end of the clamping handle; a welding mechanism, including a welding part and a fixed seat, the welding part is movably mounted on the fixed seat, and the fixed seat is movably connected to the vertical guide rail; the pressure sensor can rest against the fixed seat.

[0009] In a possible implementation, the welding part includes: a rotating bracket rotatably connected to the fixing seat; and a heating blade head rotatably connected to the rotating bracket.

[0010] In a possible implementation, a first mounting hole and a second mounting hole are provided on the heating blade head; a heating rod is provided in the first mounting hole, and a temperature sensor is provided in the second mounting hole.

[0011] In a possible implementation, the rotating bracket has a U-shaped groove, the fixing seat is a plate structure, the fixing seat is inserted into the U-shaped groove, and the rotating bracket is rotatably connected to the fixing seat via a rotating shaft.

[0012] In a possible implementation, there are two vertical guide rails which are parallel to each other; sliding parts matching the vertical guide rails are provided at both ends of the fixed seat, and the fixed seat slides on the vertical guide rails through the sliding parts.

[0013] In a possible implementation, the support assembly also includes: a first fixed plate, a second fixed plate, a first guide connecting shaft and a second guide connecting shaft; the first guide connecting shaft and the second guide connecting shaft are arranged in parallel, and the two ends of the first guide connecting shaft and the second guide connecting shaft are respectively connected to the first fixed plate and the second fixed plate; the first fixed plate and the second fixed plate are detachably connected to the magnet frame of the pie-type coil.

[0014] In one possible implementation, the moving mechanism includes: a bracket moving seat, a sliding bracket, and two linear bearings; a linear guide rail is provided on the bracket moving seat, the sliding bracket is fixed on the linear guide rail, and the sliding bracket can slide along the linear guide rail; two linear bearings are fixed at both ends of the bracket moving seat; the two linear bearings are respectively fixed on the first guide connecting shaft and the second guide connecting shaft, and the bracket moving seat realizes its sliding on the first guide connecting shaft and the second guide connecting shaft through the linear bearings.

[0015] The beneficial effect of a strip joint welding device for pancake coils provided by the present application is at least that: the present application uses a rotatable welding assembly to weld the pancake coil strip joints. During the welding process, the rotating welding assembly can be freely moved along the spatial rectangular coordinate system through a moving mechanism, and can quickly locate the position of the joint to be welded. In combination with the rotatable welding assembly, the welding angle and welding pressure can be adjusted at any time to ensure the uniformity and mechanical properties of multiple strip joints after welding. The present application can simultaneously meet the needs of welding pancake coil joints in multiple positions and different directions, without stopping the machine to adjust the position of the tooling, and effectively control the welding temperature and pressure, which can ensure the quality of the joint welding between pancake coils, keep the welding quality consistent, and meet the requirements of welding standardization. It solves the technical problems in the prior art that the quality of the joint welding between pancake coils cannot be guaranteed, the temperature and pressure required for welding cannot be standardized, and the welding quality and controllability cannot be continued. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a strip joint welding device for a pancake coil in an embodiment of the present application;

[0017] Figure 2 is a structural schematic diagram of a bracket assembly in an embodiment of the present application;

[0018] Figure 3 It is a structural schematic diagram of a welding assembly in an embodiment of the present application.

[0019] In the figure:

[0020] 100, support assembly; 101, first fixed plate; 102, second fixed plate; 103, first guide connecting shaft; 104, second guide connecting shaft; 105, linear bearing; 106, support moving seat; 107, sliding support; 108, linear guide rail;

[0021] 200, welding assembly; 201, clamping handle; 202, pressure sensor; 203, base plate; 204, vertical guide rail; 205, fixing seat; 206, rotating bracket; 207, heating blade; 208, first mounting hole; 209, second mounting hole; 210, heating rod; 211, temperature sensor; 212, slider. DETAILED DESCRIPTION

[0022] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0023] In the winding process of high-temperature superconducting coils, pancake coils are a common structure. They are composed of two flat discs wound with superconducting tapes, stacked up and down to form a double pancake structure. The winding process of the pancake coil has a significant impact on its performance. For example, different winding diameters will lead to large differences in the current carrying capacity of the coil. During the winding process, it is necessary to strictly control the relevant process details to avoid the occurrence of strip kinking, misalignment and sharp corners, and ensure the uniformity and reliability of the coil winding. Among them, the welding quality of the pancake coil joint is particularly important. After welding, the pancake coil joint must have good electrical and mechanical properties and consistent uniformity. If the welding quality cannot be guaranteed, it will seriously affect the stability and reliability of the superconducting coil.

[0024] In the prior art, there are two main methods for welding pancake coil joints, manual welding and machine tool welding. Due to differences in welding technology, manual welding is difficult to ensure the uniformity and mechanical properties of pancake coil joints. When welding with machine tooling, since the joints of multiple pancake coils have different positions and sometimes inconsistent directions, the machine tooling cannot meet the welding requirements of multiple pancake coil joints at the same time. It is necessary to constantly adjust the tooling position to weld one by one. It takes a lot of time and manpower to adjust the tooling, and the welding efficiency is low. During the welding process, the welding temperature and pressure are also difficult to control. There are differences in the welding temperature and pressure of multiple joints of the same coil. In addition, changes in the welding position cause the welding clamping point to have different shapes and cannot be adjusted.

[0025] It can be seen that the existing welding method cannot guarantee the quality of the joint welding between pancake coils, the temperature and pressure required for welding cannot be standardized, and the welding quality and controllability cannot be continued.

[0026] Therefore, the present application embodiment provides a strip joint welding device for a pancake coil, such as Figure 1-3As shown, the strip joint welding device includes: a support assembly 100, which is detachably fixed on the magnet skeleton of the pancake coil; the support assembly 100 is provided with a moving mechanism, and the moving mechanism can move along the X-axis or Y-axis of the plane coordinate system established according to the surface of the pancake coil; the welding assembly 200 is fixed on the moving mechanism, including a base plate 203, a rotary welding component and a vertical guide rail 204, the vertical guide rail 204 is fixed on the base plate 203, the rotary welding component is connected to the vertical guide rail 204, and the rotary welding component can move along the vertical guide rail 204; the rotary welding component is provided with a fastening structure, the rotary welding component can rotate around the fastening structure, and is locked in position by the fastening structure; the vertical guide rail 204 is perpendicular to the plane coordinate system, and the base plate 203 is fixedly connected to the moving mechanism.

[0027] In this embodiment, the strip joint welding device includes two parts, namely, a support assembly 100 and a welding assembly 200, and the welding assembly 200 is detachably arranged on the support assembly 100. The support assembly 100 has a moving mechanism, and the moving mechanism can move along the X-axis or Y-axis of the plane coordinate system established according to the surface of the pancake coil. The welding assembly 200 is fixedly arranged on the moving mechanism, so the welding assembly 200 can realize its movement along the X-axis or Y-axis of the above-mentioned plane coordinate system through the moving mechanism. In addition, the welding assembly 200 itself is provided with a vertical guide rail 204 perpendicular to the above-mentioned plane coordinate system. Combined with the above-mentioned moving mechanism, the welding assembly 200 can move freely in the spatial rectangular coordinate system, that is, it can move along the above-mentioned X-axis and Y-axis, and can move along the above-mentioned vertical guide rail 204, and can be positioned at the joints to be welded of multiple pancake coils, and multiple joints to be welded are welded, thereby ensuring the continuity of the welding process and being able to simultaneously meet the welding needs of strip joints at different positions and directions.

[0028] During welding, the support assembly 100 can be fixed on the magnet frame of the pancake coil, and the magnet frame of the pancake coil is used as a support base of the strip joint welding device.

[0029] The welding assembly 200 includes a base plate 203, a rotary welding assembly and a vertical guide rail 204. The base plate 203 is fixedly connected to the moving mechanism, the vertical guide rail 204 is fixed on the base plate 203, the rotary welding assembly is connected to the vertical guide rail 204, and the rotary welding assembly can move along the vertical guide rail 204; the vertical guide rail 204 is arranged perpendicular to the plane coordinate system described above. In one example, the base plate 203 is detachably connected to the moving mechanism for easy maintenance.

[0030] The rotary welding assembly is detachably connected to the vertical guide rail 204 for easy maintenance. The rotary welding assembly may be provided with a connection portion that matches the vertical guide rail 204, and the connection portion is slidably connected to the vertical guide rail 204, through which the rotary welding assembly can achieve its sliding action on the vertical guide rail 204. It is understandable that the sliding range of the rotary welding assembly should be within the length range of the vertical guide rail 204. Limiting devices, such as limit blocks, for preventing the rotary welding assembly from detaching from the vertical guide rail 204 may also be provided at both ends of the vertical guide rail 204. The limit blocks provided at both ends of the vertical guide rail 204 may be provided as limit blocks of the same structure, which is conducive to standardized processing.

[0031] The rotary welding assembly is provided with a fastening structure, and the rotary welding assembly can rotate around the fastening structure and be locked in position by the fastening structure. The fastening structure includes a locking screw, and the rotary welding assembly can rotate along the locking screw. During the welding process, if there is an angle between the joint to be welded and the welding surface, the welding part can be rotated to a suitable position so that the angle between the joint to be welded and the welding surface is 0. At this time, tighten the locking screw to fix the position of the welding part, and then weld. This can avoid uneven welding thickness or leakage caused by the angle between the joint to be welded and the welding surface. After the welding process is completed, loosen the locking screw to restore the welding part to its natural position.

[0032] Compared with the prior art, the embodiments of the present application use a rotatable welding assembly to weld the pancake coil strip joint. During the welding process, the rotating welding assembly can be freely moved along the spatial rectangular coordinate system through a moving mechanism, and can quickly locate the position of the joint to be welded. In combination with the rotatable welding assembly, the welding angle and welding pressure can be adjusted at any time to ensure the uniformity and mechanical properties of multiple strip joints after welding. The present application can simultaneously meet the needs of welding pancake coil strip joints in multiple positions and directions, without stopping to adjust the position of the tooling, and effectively control the welding temperature and pressure, which can ensure the quality of the pancake coil strip joint welding, keep the welding quality consistent, and meet the requirements of welding standardization.

[0033] In one embodiment, the rotary welding assembly also includes: a clamping mechanism, including a clamping handle 201 and a pressure sensor 202, the pressure sensor 202 is fixed at one end of the clamping handle 201; a welding mechanism, including a welding part and a fixed seat 205, the welding part is movably mounted on the fixed seat 205, and the fixed seat 205 is movably connected to the vertical guide rail 204; the pressure sensor 202 can be against the fixed seat 205.

[0034] Specifically, in this embodiment, the rotary welding assembly includes a clamping mechanism and a welding mechanism, the clamping mechanism and the welding mechanism are independently arranged, the clamping mechanism can apply pressure to the welding mechanism, and in the process of the clamping mechanism applying pressure to the welding mechanism, the clamping mechanism contacts the welding mechanism. After the pressure action is completed, the clamping mechanism is separated from the welding mechanism, and at this time, the clamping mechanism does not generate a force on the welding mechanism.

[0035] The clamping mechanism includes a clamping handle 201 and a pressure sensor 202. The pressure sensor 202 is fixedly arranged at one end of the clamping handle 201. When the clamping mechanism applies pressure to the welding mechanism, the pressure sensor 202 is in direct contact with the welding mechanism. The pressure applied by the clamping handle 201 to the welding mechanism can be read at any time, which can be used to control the welding pressure.

[0036] The clamping mechanism may further include a guide block, which is fixed on the bottom plate 203. A guide hole is provided on the guide block, and a thread is provided in the guide hole. The clamping handle 201 includes a knob and a guide rod, the knob is fixedly provided at one end of the guide rod, a thread matching the guide hole is provided on the guide rod, and the guide rod is threadedly connected to the guide hole. When the knob is rotated, the guide rod can move along the guide hole, and the welding pressure can be controlled by rotating the knob.

[0037] The welding mechanism includes a welding part and a fixing seat 205, and the welding part is fixed on the fixing seat 205. The fixing seat 205 is movably connected with the vertical guide rail 204. In an example, the number of vertical guide rails 204 is two and they are arranged in parallel. The fixing seat 205 is in the shape of a strip plate, and sliders 212 are respectively arranged at both ends of the strip plate in the length direction. The sliders 212 are matched with the vertical guide rail 204, and the sliders 212 are slidably connected with the vertical guide rail 204. The fixing seat 205 can slide on the vertical guide rail 204 through the sliders 212. It can be understood that the sliding range of the fixing seat 205 is within the length range of the vertical guide rail 204.

[0038] The pressure sensor 202 can be against the fixing seat 205. When the clamping mechanism applies pressure to the welding mechanism, the pressure sensor 202 is in direct contact with the fixing seat 205, and can read the pressure applied by the clamping handle 201 to the welding mechanism at any time, which can be used to control the welding pressure. After the welding action is completed, the pressure sensor 202 is separated from the fixing seat 205, and the clamping mechanism does not generate any force on the welding mechanism.

[0039] In one embodiment, the welding part includes: a rotating bracket 206 and a heating blade head 207. The rotating bracket 206 is rotatably connected to the fixed seat 205; the heating blade head 207 is movably connected to the rotating bracket 206 through a connecting rod. The heating blade head 207 can rotate with the rotating bracket 206, and the heating blade head 207 can also rotate around the connecting rod between the rotating bracket 206 and the heating blade head 207. Exemplarily, the heating blade head 207 and the rotating bracket 206 can be connected by a connecting rod, and the connecting rod can be a cylindrical connecting rod, one end of which is fixed to the rotating bracket 206, and the other end is fixed to the heating blade head 207. In one example, a connecting rod mounting hole is opened on the rotating bracket 206, and the cylindrical connecting rod is inserted into the connecting rod mounting hole and can rotate freely in the connecting rod mounting hole. The heating blade head 207 is fixedly connected to the cylindrical connecting rod, and the heating blade head 207 can rotate with the cylindrical connecting rod. During the welding process, the heating blade head 207 can be rotated according to the application scenario to perform joint welding to meet the welding requirements of some specific strip joints.

[0040] The rotating bracket 206 has a U-shaped groove, the fixing seat 205 is a plate structure, the fixing seat 205 is inserted into the U-shaped groove, and the rotating bracket 206 is rotatably connected to the fixing seat 205 via a rotating shaft.

[0041] Specifically, the U-shaped groove is composed of two parallel side plates and a connecting plate, and the connecting plate is perpendicular to the two side plates. The side plates and the connecting plate can be integrally formed or welded. Through holes are provided on the two parallel side plates, and the two through holes are concentrically arranged. The opening size of the U-shaped groove is larger than the strip-shaped fixing seat 205, so the fixing seat 205 can be arranged in the U-shaped groove. A mounting hole matching the above-mentioned through hole is also provided on the fixing seat 205, and the mounting hole is also concentrically arranged with the above-mentioned through hole for passing the rotating shaft. The size of the mounting hole can be the same as the size of the through hole, or slightly larger.

[0042] The rotating bracket 206 is rotatably connected to the fixed seat 205 via a rotating shaft. The rotating shaft passes through the through hole and the mounting hole in sequence to fix the rotating bracket 206 on the fixed seat 205. After installation, the opening of the rotating bracket 206 faces upward and naturally hangs on the fixed seat 205 without interfering with the fixed seat 205. The rotating bracket 206 can rotate around the rotating shaft.

[0043] The side plates of the rotating bracket 206 are symmetrically provided with limit bolts movably mounted on the fixed seat 205, which are used to limit the rotation angle of the rotating bracket 206 and maintain the rotating bracket 206 at a specific position, thereby limiting the heating blade 207 to perform welding operations at a specific position. For example, on the fixed seat 205, on both sides close to the rotating bracket 206, limit bolts are respectively provided to limit the rotation angle of the rotating bracket 206. The limit bolts are movably provided with the fixed seat 205.

[0044] In one embodiment, a plurality of limiting bolt mounting holes may be provided on the fixing seat 205, and the plurality of limiting bolt mounting holes are arranged at intervals, wherein the spacing between adjacent limiting bolt mounting holes may be set to the same distance or to different distances, and may be set according to the requirements of welding conditions. The limiting bolt is detachably connected to the fixing seat 205, and the rotation angle of the rotating bracket 206 may be adjusted according to the installation position of the limiting bolt.

[0045] The heating blade head 207 is rotatably connected to the connecting plate of the rotating bracket 206 through a connecting rod. Specifically, the heating blade head 207 and the rotating bracket 206 can be connected through a connecting rod, and the connecting rod can be a cylindrical connecting rod, one end of which is fixed to the rotating bracket 206, and the other end is fixed to the heating blade head 207. In one example, a connecting rod mounting hole is provided on the rotating bracket 206, and the cylindrical connecting rod is inserted into the connecting rod mounting hole and can rotate freely in the connecting rod mounting hole. The heating blade head 207 is fixedly connected to the cylindrical connecting rod, and the heating blade head 207 can rotate with the cylindrical connecting rod. During the welding process, the heating blade head 207 can be rotated according to the application scenario to perform joint welding to meet the welding requirements of some specific strip joints.

[0046] In one embodiment, a first mounting hole 208 and a second mounting hole 209 are provided on the heating blade head 207 ; a heating rod 210 is provided in the first mounting hole 208 , and a temperature sensor 211 is provided in the second mounting hole 209 .

[0047] Specifically, the first mounting hole 208 and the second mounting hole 209 are arranged in parallel, and the heating rod 210 is fixed in the first mounting hole 208. The heating rod 210 is used to heat the heating blade head 207 to increase the temperature of the heating blade head 207 to meet the welding temperature requirement. The temperature sensor 211 is fixed in the second mounting hole 209. In one example, the heating blade head 207 is made of a heat-conducting material, and the temperature sensor 211 can accurately obtain the temperature of the heating blade head 207. In another example, the first mounting hole 208 and the second mounting hole 209 are arranged close to each other.

[0048] Preferably, the second mounting hole 209 is close to the welding surface so that the temperature sensor 211 can obtain a more accurate welding temperature.

[0049] In one embodiment, the support assembly 100 also includes: a first fixed plate 101, a second fixed plate 102, a first guide connecting shaft 103 and a second guide connecting shaft 104; the first guide connecting shaft 103 and the second guide connecting shaft 104 are arranged in parallel, and the two ends of the first guide connecting shaft 103 and the second guide connecting shaft 104 are respectively connected to the first fixed plate 101 and the second fixed plate 102; the first fixed plate 101 and the second fixed plate 102 are detachably connected to the magnet skeleton of the pie-shaped coil.

[0050] Specifically, in this embodiment, the support assembly 100 is composed of two fixed plates (i.e., the first fixed plate 101 and the second fixed plate 102) and two guide connecting shafts (i.e., the first guide connecting shaft 103 and the second guide connecting shaft 104). The first guide connecting shaft 103 and the second guide connecting shaft 104 are fixedly arranged between the first fixed plate 101 and the second fixed plate 102, and connect the first fixed plate 101 and the second fixed plate 102. The first guide connecting shaft 103 and the second guide connecting shaft 104 have a guiding function, so that the moving mechanism of the support assembly 100 can move in the axial direction.

[0051] The first fixing plate 101 and the second fixing plate 102 are detachably connected to the magnetic frame of the pancake coil. It should be understood that the magnetic frame of the pancake coil is a frame that supports and protects the pancake coil and has a certain rigidity that can meet the fixing requirements of the first fixing plate 101 and the second fixing plate 102.

[0052] In one embodiment, the first fixing plate 101 and the second fixing plate 102 have the same structure and are symmetrically arranged. A moving part is arranged on both the first fixing plate 101 and the second fixing plate 102, and the support assembly 100 can be moved on the magnet frame of the pancake coil through the moving part, which meets the requirement that the welding device as a whole moves on the magnet frame of the pancake coil. When welding joints at different positions, it is not necessary to remove the support assembly 100 from the magnet frame, and the welding device can be directly slid to the vicinity of the position of the head to be welded to implement welding, which greatly improves the welding speed.

[0053] In one embodiment, the first guide connecting shaft 103 and the second guide connecting shaft 104 have the same length; the first fixing plate 101 and the second fixing plate 102 are arranged in parallel.

[0054] In this embodiment, the first guide connecting shaft 103 and the second guide connecting shaft 104 having the same length and arranged in parallel can make the first fixing plate 101 and the second fixing plate 102 in a parallel state, which can meet the sliding requirements of the welding device on the magnet skeleton of the pancake coil.

[0055] In one embodiment, the moving mechanism includes: a bracket moving seat 106, a sliding bracket 107, and two linear bearings 105; a linear guide rail 108 is arranged on the bracket moving seat 106, and the sliding bracket 107 is fixed on the linear guide rail 108, and the sliding bracket 107 can slide along the linear guide rail 108; two linear bearings 105 are fixed at both ends of the bracket moving seat 106; the two linear bearings 105 are respectively fixed on the first guide connecting shaft 103 and the second guide connecting shaft 104, and the bracket moving seat 106 realizes its sliding on the first guide connecting shaft 103 and the second guide connecting shaft 104 through the linear bearings 105.

[0056] A linear bearing 105 is respectively arranged at both ends of the bracket moving seat 106 , and the two linear bearings 105 are respectively sleeved on the first guide connecting shaft 103 and the second guide connecting shaft 104 . The linear bearings 105 can drive the bracket moving seat 106 to move on the first guide connecting shaft 103 and the second guide connecting shaft 104 .

[0057] A linear guide 108 is provided on the bracket moving seat 106, and the guide is used to connect the sliding bracket 107, and the welding assembly 200 is fixed on the sliding bracket 107, so that the welding assembly 200 can move along the linear guide 108. Through the linear guide 108 and the linear bearing 105, the welding assembly 200 has the ability to move in two directions, that is, it can move along the X axis or Y axis of the plane coordinate system established according to the surface of the pancake coil. Combined with the above-mentioned vertical guide 204, the welding assembly 200 has the ability to move freely in the spatial rectangular coordinate system.

[0058] In one embodiment, there are two linear guide rails 108 that are parallel to each other; a connecting portion matching the linear guide rail 108 is provided on the sliding bracket 107, and the sliding bracket 107 slides on the linear guide rail 108 through the connecting portion.

[0059] In other embodiments, the number of linear guide rails 108 can be set according to actual conditions, including but not limited to one or more.

[0060] The present application uses a rotatable welding assembly to weld pancake coil strip joints. During the welding process, the rotating welding assembly can be freely moved along the spatial rectangular coordinate system through a moving mechanism, and can quickly locate the position of the joint to be welded. In combination with the rotatable welding assembly, the welding angle and welding pressure can be adjusted at any time to ensure the uniformity and mechanical properties of multiple strip joints after welding. The present application can simultaneously meet the needs of welding pancake coil strip joints in multiple positions and directions, without stopping the machine to adjust the position of the tooling, and effectively control the welding temperature and pressure, which can ensure the quality of the welding of pancake coil strip joints, keep the welding quality consistent, and meet the requirements of welding standardization.

[0061] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0062] In addition, the terms "above" and "below" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "above" and "below" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A strip joint welding device for pancake coils, characterized in that: include: A support assembly is detachably fixed to the magnet frame of the pancake coil; The support assembly is provided with a moving mechanism, and the moving mechanism can move along the X-axis or Y-axis of the plane coordinate system established according to the surface of the pancake coil; A welding assembly, fixed on the moving mechanism, comprising a base plate, a rotary welding assembly and a vertical guide rail, wherein the vertical guide rail is fixed on the base plate, the rotary welding assembly is connected to the vertical guide rail, and the rotary welding assembly can move along the vertical guide rail; The rotary welding assembly is provided with a fastening structure, the rotary welding assembly can rotate around the fastening structure and be locked in position by the fastening structure; The vertical guide rail is arranged perpendicularly to the plane coordinate system, and the bottom plate is fixedly connected to the moving mechanism; The spin welding assembly also includes: A clamping mechanism, comprising a clamping handle and a pressure sensor, wherein the pressure sensor is fixed at one end of the clamping handle; The welding mechanism comprises a welding part and a fixing seat, wherein the welding part is movably mounted on the fixing seat, and the fixing seat is movably connected to the vertical guide rail; The pressure sensor may be against the fixing seat; The welding part comprises: A rotating bracket, rotatably connected to the fixing seat; A heating cutter head is rotatably connected to the rotating bracket; The heating cutter head is provided with a first mounting hole and a second mounting hole; A heating rod is arranged in the first mounting hole, and a temperature sensor is arranged in the second mounting hole; The support assembly further includes: a first fixing plate, a second fixing plate, a first guide connecting shaft and a second guide connecting shaft; The first guide connecting shaft and the second guide connecting shaft are arranged in parallel, and two ends of the first guide connecting shaft and the second guide connecting shaft are connected to the first fixing plate and the second fixing plate respectively; The first fixing plate and the second fixing plate are detachably connected to the magnet skeleton of the pancake coil; The moving mechanism comprises: a bracket moving seat, a sliding bracket, and two linear bearings; The bracket moving seat is provided with a linear guide rail, the linear guide rail is used to connect the sliding bracket, a welding assembly is fixed on the sliding bracket, and the sliding bracket can slide along the linear guide rail; A linear bearing is respectively arranged at both ends of the bracket moving seat, and the two linear bearings are respectively sleeved on the first guide connecting shaft and the second guide connecting shaft, and the linear bearings can drive the bracket moving seat to move on the first guide connecting shaft and the second guide connecting shaft.

2. The strip joint welding device according to claim 1, characterized in that: The rotating bracket has a U-shaped groove, the fixing seat is a plate structure, the fixing seat is inserted into the U-shaped groove, and the rotating bracket is rotatably connected to the fixing seat via a rotating shaft.

3. The strip joint welding device according to claim 1, characterized in that: The number of the vertical guide rails is two and they are parallel to each other; Sliding parts matching the vertical guide rail are arranged at both ends of the fixing seat, and the fixing seat slides on the vertical guide rail through the sliding parts.

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