Cold shield vertical plate and frame welding tool

Abstract

The invention relates to the technical field of welding equipment, and particularly discloses a cold shield vertical plate and frame welding tool which comprises a first positioning mechanism, a second positioning mechanism and a third positioning mechanism which are arranged in a lifting mode, and a vertical plate of a cold shield is positioned through the first positioning mechanism and the second positioning mechanism; the upper cover plate of the cold shield is positioned through the third positioning mechanism, so that welding operation is assisted, when the vertical plates are driven by the first positioning mechanism to be close to one another, the positions where the vertical plates are close to one another are positioned through the second positioning mechanism, and therefore the multiple vertical plates are spliced into a barrel shape so that the vertical plates can be conveniently welded through external welding equipment; the upper cover plate can be conveniently positioned through the first positioning mechanism and matched with the third positioning mechanism, subsequent welding is facilitated, in addition, after welding is completed, the welded vertical plate and the welded upper cover plate can be integrally moved away along the top of the vertical rod, subsequent welding machining is facilitated, the next vertical plate and the like can be conveniently welded, and the welding efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a welding fixture for cold-screen vertical plates and frames. Background Technology

[0002] The HH-70's main system comprises three core components: the external vacuum dewar, the vacuum chamber, and the inner and outer cold shields. The external vacuum dewar serves as the device's external vacuum container, maintaining the internal superconducting environment. The vacuum chamber, a ring-shaped cavity at its core, contains plasma and facilitates nuclear fusion reactions. The inner and outer cold shields maintain the cryogenic environment required for the superconducting magnets, ensuring stable operation of the device.

[0003] CN214236956U discloses a welding fixture for the intercooler gas transmission pipe, which is designed to position the branch pipe and the gas transmission pipe to facilitate subsequent welding.

[0004] Based on existing technologies, the following problems exist; During the assembly and welding process of the inner and outer cold shields, the outer cold shield is composed of multiple vertical plates, an upper cover plate, and a lower cover plate. The vertical plates are typically curved and large in volume, making them difficult to position during welding to form a cylindrical shape, which hinders subsequent welding. Furthermore, after the vertical plates are welded, the inner cold shield needs to be welded inside to form a complete cold shield. After welding the vertical plates and part of the upper cover plate, it is difficult to remove them from the positioning mechanism, affecting the efficiency of subsequent welding. Referring to the aforementioned application documents, they only fix the tubular structure, but are insufficient in positioning the curved structure that makes up the tubular structure, thus affecting actual subsequent welding use. To solve these problems, a welding fixture for the cold shield vertical plates and frame is proposed. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding fixture for welding a cold-screen vertical plate to a frame, comprising: A base has a vertical rod fixed at its top center. The side wall of the vertical rod is equipped with a first positioning mechanism, a second positioning mechanism, and a third positioning mechanism. The first and second positioning mechanisms work together to position the vertical plate of the cold screen, while the third positioning mechanism positions the upper cover plate of the cold screen, thus assisting the welding operation. The first positioning mechanism includes: A lifting sleeve is fitted onto the side wall of a vertical rod. A mounting ring is fixedly fitted onto the outer wall of the lifting sleeve. A drive mechanism for raising and lowering the lifting sleeve is provided on the side wall of the base. A ring-shaped array of fixing components is arranged on the top of the mounting ring. The fixing components include: The first rotating rod is rotatably mounted on the top of the mounting ring and is symmetrically arranged with respect to the center point of the mounting ring. A support plate is fixedly sleeved on the middle of the side wall of the first rotating rod. A connecting plate is movably mounted on the end of the support plate away from the first rotating rod. An elastic abutment is fixedly mounted on the side of the connecting plate away from the support plate. A first electromagnet is fixedly mounted at the center and on both sides of the side of the elastic abutment away from the connecting plate.

[0006] Furthermore, the fixing component also includes: The mounting slots are located on the top two sides of the connecting plate. The inner wall of the mounting slots is designed to be inclined. The inner wall of the mounting slots away from the center of the connecting plate is fixed with spaced baffles. The bent plate is fixed on both sides of the elastic abutment and extends into the mounting groove. The bent plate is designed to be inclined, and the inclination angle is close to the inclination angle of the inner wall of the mounting groove on one side of the abutment. The bend of the bent plate tends to move closer to the abutment, and the bend of the bent plate can deform to limit the deformation of the elastic abutment.

[0007] Furthermore, the fixing component also includes: The fixing rods are fixedly installed on the side of the connecting plate near the elastic abutment and are arranged at intervals. The side of the fixing rods away from the connecting plate is fixedly connected to the elastic abutment to limit the center of the elastic abutment. An airbag is fixedly installed on the side of the connecting plate near the elastic abutment and sleeved on the outside of the fixing rod, so as to control the deformation of the elastic abutment by the expansion of the airbag.

[0008] Furthermore, the fixing component also includes: The first groove is formed on the side of the support plate near the connecting plate. The inner wall of the first groove is provided with a second groove. The inner wall of the second groove is fixedly provided with a second electromagnet. The inner wall of the second groove is fitted with a third electromagnet. The sides of the third electromagnet and the second electromagnet that are close to each other are the same magnetic poles. The third electromagnet and the second electromagnet are both designed in a ring shape. The inner wall of the second groove is fitted with a spring, and the spring is located on the side of the third electromagnet away from the second electromagnet. The connecting rod is fixedly installed on the side of the third electromagnet close to the second electromagnet, and extends along the inner wall of the second electromagnet and the first groove to the outside of the support plate. The end of the connecting rod located outside the support plate is fixedly connected to the connecting plate. The longitudinal section of the connecting rod is designed as a regular hexagon, and the side wall of the connecting rod fits against the inner wall of the first groove.

[0009] Furthermore, the fixing component also includes: Limiting grooves are provided at the top and bottom of the support plate. First sliders are placed inside the limiting grooves. Support rods are hinged to the sides of the first sliders that are far apart from each other. The ends of the support rods that are far away from the first sliders are fixedly connected to the upper and lower ends of the connecting plate, respectively. A first gear is fixedly sleeved on the lower end of the side wall of the first rotating rod. A second gear that meshes with the two first gears is rotatably provided on the top of the mounting ring. A third gear is fixedly sleeved on the upper end of the side wall of one of the first rotating rods. The first positioning mechanism further includes: The first gear ring is rotatably mounted on the outer wall of the lifting sleeve. The first gear ring meshes with the third gear. The outer wall of the lifting sleeve is fixedly equipped with a first servo motor for driving the first gear ring to rotate.

[0010] Furthermore, there are two second positioning mechanisms, located at the top and bottom of the first positioning mechanism respectively. The second positioning mechanism includes: The limiting seat is fixedly installed on the outer wall of the lifting sleeve and arranged in a ring array. The inside of the limiting seat is provided with a first threaded tube, and the inner wall of the first threaded tube is threadedly connected with a first threaded rod. The first threaded tube extends to the outside of the limiting seat. An arc-shaped plate is fixed to the end of the first threaded tube located outside the limit seat by bolts.

[0011] Furthermore, the second positioning mechanism also includes: The second gear ring is rotatably mounted on the outer wall of the lifting sleeve, and a second servo motor for driving the second gear ring to rotate is fixedly mounted on the outer wall of the lifting sleeve. The second rotating rod is rotatably mounted on the top of the limiting seat and extends into the limiting seat. A fourth gear is fixedly sleeved on the side wall of the end of the second rotating rod outside the limiting seat. The fourth gear meshes with the second gear ring. The second rotating rod is connected to the first threaded rod through a bevel gear.

[0012] Furthermore, the third positioning mechanism includes: An external threaded sleeve is fitted onto the side wall of a vertical rod, and an internal threaded sleeve is threaded onto the outer wall of the external threaded sleeve. A ring plate is fixedly sleeved on the lower end of the outer wall of the internally threaded sleeve. A fourth electromagnet is fixedly installed on the top of the ring plate. The fourth electromagnet is designed in a ring shape to limit the movement of the upper cover plate.

[0013] Furthermore, the drive mechanism includes: The third servo motor is fixedly mounted on the side wall of the base. The output shaft of the third servo motor is fixedly mounted with a third rotating rod through a coupling. The third rotating rod is rotatably connected to the base and extends into the base. The third rotating rod is connected to a second threaded rod through a bevel gear transmission. The two ends of the second threaded rod are rotatably connected to the top of the base and the top of the vertical rod, respectively. An installation through hole is provided at the bottom of the vertical rod, and a sliding through groove is provided on the side wall of the vertical rod, and the sliding through groove is connected to the installation through hole.

[0014] Furthermore, the drive mechanism also includes: The second threaded tube is threaded to the side wall of the second threaded rod, and the side wall of the second threaded rod is threaded to the third threaded tube. Both the second threaded tube and the third threaded tube are fitted into the mounting through hole. The sliding plate is fixedly installed on both sides of the outer wall of the second and third threaded tubes, and is fixedly connected to the inner wall of the external threaded sleeve and the inner wall of the lifting sleeve, respectively.

[0015] This invention provides a welding fixture for welding the vertical plate and frame of a cold-screen display. Compared with the prior art, it has the following advantages: 1. In this invention, when the vertical plates are brought closer together by the first positioning mechanism, the second positioning mechanism positions the vertical plates at their close proximity, thereby splicing multiple vertical plates into a cylindrical shape to facilitate welding by external welding equipment. In conjunction with the third positioning mechanism, it facilitates the positioning of the upper cover plate for subsequent welding. Furthermore, after welding, the welded vertical plates and upper cover plate can be moved as a whole along the top of the vertical rod, facilitating subsequent welding processing and welding of the next vertical plate, thus improving welding efficiency.

[0016] 2. The present invention uses a first electromagnet to magnetically attract the vertical plates from the inside, so as to bring the vertical plates closer together, thereby facilitating subsequent welding. Furthermore, an airbag supports the elastic abutment, so that the first electromagnets on both sides and the center of the elastic abutment can contact and adhere to the vertical plates, thereby improving the stability of the magnetically fixed vertical plates.

[0017] 3. The present invention has a tendency for the bent part of the bent plate to move closer to the stop bar. After the elastic abutment plate is pressed tightly against the inner side of the vertical plate, the airbag can assist in providing support on both sides of the elastic abutment plate, thereby improving the stability of the magnetic fixation of the vertical plate and avoiding displacement during subsequent welding process, thus avoiding affecting the stability of the welding.

[0018] 4. The present invention adjusts the height of the first positioning mechanism, the second positioning mechanism and the third positioning mechanism through the lifting mechanism, and makes the horizontal position of the arc plate of the second positioning component adjustable so as to facilitate the use of vertical plates of different sizes. In addition, the first servo motor adjusts the spacing between the first electromagnets to expand the application range of the fixed vertical plate and facilitate synchronous operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the first positioning mechanism and the third positioning mechanism of the present invention; Figure 3 This is a longitudinal sectional view of the base, vertical rod, lifting sleeve, and mounting ring of the present invention. Figure 4 For the present invention Figure 3A magnified structural diagram of A in the middle; Figure 5 For the present invention Figure 3 A magnified structural diagram of B in the diagram; Figure 6 This is a schematic diagram of the first positioning mechanism and the second positioning mechanism of the present invention; Figure 7 This is a schematic diagram of the first positioning mechanism of the present invention; Figure 8 This is a schematic diagram of the fixed component structure of the ring array arrangement of the present invention; Figure 9 This is a schematic diagram of the fixed component structure of the present invention; Figure 10 This is a schematic diagram of the first and second groove structures of the present invention; Figure 11 This is a longitudinal cross-sectional view of the connecting plate, elastic abutment, and airbag of the present invention. Figure 12 This is a schematic diagram of the mounting slot structure of the present invention; Figure 13 This is a schematic diagram of the second positioning mechanism of the present invention; Figure 14 This is a longitudinal sectional view of the limiting seat of the present invention.

[0020] The reference numerals in the above figures are as follows: 1. Base; 2. Vertical rod; 3. Third positioning mechanism; 4. Second positioning mechanism; 5. First positioning mechanism; 6. Drive mechanism; 31. External threaded sleeve; 32. Ring plate; 33. Fourth electromagnet; 34. Internal threaded sleeve; 41. Arc-shaped plate; 42. Fourth gear; 43. Second rotating rod; 44. Second servo motor; 45. Second gear ring; 46. Limit seat; 47. First threaded tube; 48. First threaded rod; 51. Lifting sleeve; 52. Mounting ring; 53. Fixing assembly; 54. First servo motor; 55. First gear ring; 530. Bend plate; 531. First electromagnet; 532. Support plate; 533. Connecting plate; 534. Support rod; 535. Limiting groove; 536. Elastic abutment plate; 537. First rotating rod; 538. First gear; 539. Second gear; 5390. Mounting through groove; 5391. Third gear; 5392. Third electromagnet; 5393. Second electromagnet; 5394. First groove; 5395. Connecting rod; 5396. Second groove; 5397. Fixing rod; 5398. Airbag; 5399. Stop bar; 61. Third servo motor; 62. Third rotating rod; 63. Second threaded rod; 64. Second threaded tube; 65. Sliding plate; 66. Mounting through hole; 67. Sliding through groove; 68. Third threaded tube. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figure 1 , Figure 2 , Figures 6-12 A welding fixture for welding a vertical panel and frame to a cold-screen display includes: A base 1 has a vertical rod 2 fixedly installed at the top center. A first positioning mechanism 5, a second positioning mechanism 4, and a third positioning mechanism 3 are vertically mounted on the side wall of the vertical rod 2. The first positioning mechanism 5 and the second positioning mechanism 4 work together to position the vertical plate of the cold screen, while the third positioning mechanism 3 positions the upper cover plate of the cold screen, thus assisting the welding operation. The first positioning mechanism 5 includes: A lifting sleeve 51 is sleeved on the side wall of the vertical rod 2. An installation ring 52 is fixedly sleeved on the outer wall of the lifting sleeve 51. A drive mechanism 6 for driving the lifting sleeve 51 to rise and fall is provided on the side wall of the base 1. A fixing component 53 arranged in a ring array is provided on the top of the installation ring 52. The fixing component 53 includes: The first rotating rod 537 is rotatably mounted on the top of the mounting ring 52 and is symmetrically arranged with respect to the center point of the mounting ring 52. The middle of the side wall of the first rotating rod 537 is fixedly fitted with a support plate 532. The end of the support plate 532 away from the first rotating rod 537 is movably provided with a connecting plate 533. The side of the connecting plate 533 away from the support plate 532 is fixedly provided with an elastic abutment 536. The center and both sides of the side of the elastic abutment 536 away from the connecting plate 533 are fixedly provided with a first electromagnet 531.

[0023] The fixing component 53 also includes: The mounting slot 5390 is opened on both sides of the top of the connecting plate 533. The inner wall of the mounting slot 5390 is inclined. The inner wall of the mounting slot 5390 away from the center of the connecting plate 533 is fixedly provided with spaced baffles 5399. The bent plate 530 is fixed on both sides of the elastic abutment plate 536 and extends into the mounting groove 5390. The bent plate 530 is designed to be inclined, and the inclination angle is close to the inclination angle of the inner wall of the mounting groove 5390 on the side where the baffle 5399 is installed. The bend of the bent plate 530 tends to move closer to the baffle 5399, and the bend of the bent plate 530 can deform to limit the deformation of the elastic abutment plate 536.

[0024] The fixing component 53 also includes: The fixing rod 5397 is fixedly disposed on the side of the connecting plate 533 near the elastic abutment 536 and is arranged at intervals. The side of the fixing rod 5397 away from the connecting plate 533 is fixedly connected to the elastic abutment 536 to limit the center of the elastic abutment 536. Airbag 5398 is fixedly mounted on the side of connecting plate 533 near elastic abutment 536 and sleeved on the outside of fixing rod 5397, so as to control the deformation of elastic abutment 536 by the expansion of airbag 5398.

[0025] The fixing component 53 also includes: The first groove 5394 is formed on the side of the support plate 532 near the connecting plate 533. The inner wall of the first groove 5394 is provided with a second groove 5396. The inner wall of the second groove 5396 is fixedly provided with a second electromagnet 5393. The inner wall of the second groove 5396 is fitted with a third electromagnet 5392. The sides of the third electromagnet 5392 and the second electromagnet 5393 that are close to each other are the same magnetic poles. The third electromagnet 5392 and the second electromagnet 5393 are both designed in a ring shape. The inner wall of the second groove 5396 is fitted with a spring, and the spring is located on the side of the third electromagnet 5392 away from the second electromagnet 5393. The connecting rod 5395 is fixedly installed on the side of the third electromagnet 5392 near the second electromagnet 5393, and extends along the inner wall of the second electromagnet 5393 and the first groove 5394 to the outside of the support plate 532. The end of the connecting rod 5395 located outside the support plate 532 is fixedly connected to the connecting plate 533. The longitudinal section of the connecting rod 5395 is designed as a regular hexagon, and the side wall of the connecting rod 5395 fits against the inner wall of the first groove 5394.

[0026] The fixing component 53 also includes: Limiting grooves 535 are provided at the top and bottom of the support plate 532. First sliders are placed inside the limiting grooves 535. Support rods 534 are hinged to the sides of the first sliders that are far apart from each other. The ends of the support rods 534 that are far away from the first sliders are fixedly connected to the upper and lower ends of the connecting plate 533, respectively. A first gear 538 is fixedly sleeved on the lower end of the side wall of the first rotating rod 537. A second gear 539 that meshes with the two first gears 538 is rotatably provided on the top of the mounting ring 52. A third gear 5391 is fixedly sleeved on the upper end of the side wall of one of the first rotating rods 537. The first positioning mechanism 5 also includes: The first gear ring 55 is rotatably mounted on the outer wall of the lifting sleeve 51. The first gear ring 55 meshes with the third gear 5391. The outer wall of the lifting sleeve 51 is fixedly provided with a first servo motor 54 for driving the first gear ring 55 to rotate.

[0027] In practice, the vertical plate is placed on top of the base 1, and the first electromagnet 531 is positioned at the interval where the horizontal neck tube is installed on the side wall of the vertical plate. The vertical plate is magnetically fixed by the first electromagnet 531. Then, the second electromagnet 5393 and the third electromagnet 5392 generate a repulsive force on the side where they are close to each other. The repulsive force pushes the third electromagnet 5392 to move away from the second electromagnet 5393, thereby driving the connecting rod 5395, the connecting plate 533 and the first electromagnet 531 to move, so as to move the vertical plate and bring the multiple vertical plates closer to each other. When the inner side of the vertical plate is pressed against the arc plate 41 of the second positioning mechanism 4, the vertical plate can no longer move. At this time, the multiple vertical plates form a cylindrical shape. Then, the connection of the multiple vertical plates is welded by external welding equipment, thereby fixing the vertical plate.

[0028] When the first positioning mechanism 5 moves the vertical plates closer together, the second positioning mechanism 4 positions the vertical plates at their close proximity, thereby splicing multiple vertical plates into a cylindrical shape to facilitate welding with external welding equipment. In conjunction with the third positioning mechanism 3, it facilitates the positioning of the upper cover plate for subsequent welding. Furthermore, after welding, the welded vertical plates and upper cover plate can be moved along the top of the vertical rod 2 as a whole, facilitating subsequent welding processing and welding of the next vertical plate, thus improving welding efficiency.

[0029] The first electromagnet 531 magnetically attracts the vertical plates from the inside, facilitating their movement closer together for subsequent welding. An airbag 5398 supports the elastic abutment 536. When inflated, the airbag compresses and expands the elastic abutment 536, allowing it to fully contact the inner wall of the vertical plates. This ensures the first electromagnets 531 on both sides and at the center of the elastic abutment 536 contact and adhere to the vertical plates, improving the stability of the magnetic fixation. During expansion, the elastic abutment 536 drives the bending plate 53... The bent plate 530 moves between multiple stop bars 5399. Since the bent portion of the bent plate 530 tends to move closer to the stop bars 5399, after the elastic abutment 536 is pressed against the inner side of the vertical plate, the bent plate 530 abuts against the stop bars 5399. This assists the airbag 5398 in providing support on both sides of the elastic abutment 536, and the center of the elastic abutment 536 is fixed by the fixing rod 5397 to improve the stability of the elastic abutment 536, thereby improving the stability of the magnetically fixed vertical plate and preventing displacement during subsequent welding, thus avoiding affecting the stability of the welding. When it is necessary to reset both sides of the elastic abutment 536, the airbag 5398 deflates. Because the stop bars 5399 and the bent portion of the bent plate 530 are pressed against each other, the bent portion of the bent plate 530 can be manually moved away from the stop bars 5399 for the next use.

[0030] The lifting mechanism drives the lifting sleeve 51 to rise and fall, thereby adjusting the height of the first positioning mechanism 5, the second positioning mechanism 4, and the third positioning mechanism 3 to accommodate vertical plates of different sizes. The first servo motor 54 drives the first gear ring 55 to rotate, thereby driving the third gear 5391 of the fixed assembly 53 arranged in a ring to rotate. Under the action of the second gear 539, the two support plates 532 in a fixed assembly 53 are brought closer or further apart, thereby adjusting the distance between the first electromagnets 531 to expand the application range of the fixed vertical plate and facilitate synchronous operation.

[0031] Please see Figure 13 and Figure 14 The second positioning mechanism 4 has two parts, located at the top and bottom of the first positioning mechanism 5 respectively. The second positioning mechanism 4 includes: The limiting seat 46 is fixedly installed on the outer wall of the lifting sleeve 51 and arranged in a ring array. The first threaded tube 47 is slidably provided inside the limiting seat 46. The inner wall of the first threaded tube 47 is threadedly connected to the first threaded rod 48. The first threaded tube 47 extends to the outside of the limiting seat 46. The arc-shaped plate 41 is fixed to one end of the first threaded tube 47 outside the limit seat 46 by bolts.

[0032] The second positioning mechanism 4 also includes: The second gear ring 45 is rotatably mounted on the outer wall of the lifting sleeve 51. The outer wall of the lifting sleeve 51 is fixedly provided with a second servo motor 44 for driving the second gear ring 45 to rotate. The second rotating rod 43 is rotatably mounted on the top of the limiting seat 46 and extends into the limiting seat 46. A fourth gear 42 is fixedly sleeved on the side wall of the second rotating rod 43 outside the limiting seat 46. The fourth gear 42 meshes with the second gear ring 45. The second rotating rod 43 is connected to the first threaded rod 48 through a bevel gear.

[0033] In practice, when the first positioning mechanism 5 moves the vertical plate closer to and abuts against the arc plate 41, the first positioning mechanism 5 moves the vertical plate closer to the vertical rod 2, and the arc plate 41 supports it from the inside of the vertical plate, thereby fixing the vertical plate so that it can be welded by external welding equipment later.

[0034] The second servo motor 44 drives the second gear ring 45 to rotate, which in turn drives the fourth gear 42 arranged in a ring array to rotate, so that the first threaded rod 48 rotates synchronously, thereby driving the arc plates 41 to move closer or further away from each other, thus adjusting the position of the arc plates 41 against the vertical plate, so as to make actual adjustments according to the size of the vertical plate, which is convenient for actual use.

[0035] Example 2: Please refer to Figures 2-4 The technical difference between this embodiment and Embodiment 1 is that the third positioning mechanism 3 includes: An external threaded sleeve 31 is fitted onto the side wall of the vertical rod 2, and an internal threaded sleeve 34 is threadedly connected to the outer wall of the external threaded sleeve 31. The ring plate 32 is fixedly sleeved on the lower end of the outer wall of the internal threaded sleeve 34. A fourth electromagnet 33 is fixedly installed on the top of the ring plate 32. The fourth electromagnet 33 is designed in a ring shape to limit the upper cover plate.

[0036] In practice, the bottom side of the upper cover plate near the vertical rod 2 is placed on top of the fourth electromagnet 33, and the outer side of the upper cover plate is placed on top of the vertical plate. The upper cover plate is then magnetically fixed by the fourth electromagnet 33, which facilitates the subsequent welding of the upper cover plate and the vertical plate. After welding, the upper cover plate and the vertical plate can be easily moved away along the top of the vertical rod 2 using external hoisting equipment, which facilitates the switching between workstations and the actual welding process.

[0037] Please see Figures 3-5 The drive mechanism 6 includes: The third servo motor 61 is fixedly mounted on the side wall of the base 1. The output shaft of the third servo motor 61 is fixedly mounted with a third rotating rod 62 via a coupling. The third rotating rod 62 is rotatably connected to the base 1 and extends into the base 1. The third rotating rod 62 is connected to a second threaded rod 63 via a bevel gear transmission. The two ends of the second threaded rod 63 are rotatably connected to the top of the base 1 and the top of the vertical rod 2, respectively. A mounting through hole 66 is provided at the bottom of the vertical rod 2. A sliding through groove 67 is provided on the side wall of the vertical rod 2, and the sliding through groove 67 is connected to the mounting through hole 66.

[0038] The drive mechanism 6 also includes: The second threaded tube 64 is threaded to the side wall of the second threaded rod 63, and the side wall of the second threaded rod 63 is threaded to the third threaded tube 68. Both the second threaded tube 64 and the third threaded tube 68 are fitted into the mounting through hole 66. The sliding plate 65 is fixedly disposed on both sides of the outer wall of the second threaded tube 64 and the third threaded tube 68, and is fixedly connected to the inner wall of the external threaded sleeve 31 and the inner wall of the lifting sleeve 51, respectively.

[0039] In practical implementation, the first servo motor 54 drives the third rotating rod 62 to rotate, thereby driving the second threaded rod 63 to rotate, so that the second threaded tube 64 moves vertically under the limit of the sliding plate 65 and the sliding through groove 67, thereby driving the lifting sleeve 51 and the internal threaded sleeve 34 to rise and fall, so as to adjust the height of the first positioning mechanism 5, the second positioning mechanism 4 and the third positioning mechanism 3, so as to be suitable for use with vertical plates of different sizes, and without affecting the removal of the welded vertical plate and the top cover plate along the top of the vertical rod 2, which is convenient for practical use.

[0040] In implementation, this invention uses a first positioning mechanism 5 and a second positioning mechanism 4 to position multiple vertical plates, arranging them into a cylindrical shape. After positioning, external welding equipment is used to weld the joints of the vertical plates from the outside, thus connecting and fixing the plates to ensure the stability of the formed cylinder. After welding, a third positioning mechanism 3 positions the upper cover plate, ensuring a stable connection between the upper cover plate and the top of the vertical plates. After positioning the upper cover plate, external welding equipment is used to weld it from the outside, connecting and fixing the upper cover plate and the vertical plates to form the outer cold screen prototype. Then, the first positioning mechanism 5 and the second positioning mechanism 4 are reset, and external hoisting equipment is used to lift the welded vertical plates and upper cover plate, transferring them to the next workstation. At the next workstation, a lower cover plate is welded to the bottom of the vertical plates, forming the outer cold screen frame. Before welding the lower cover plate, the inner cold screen is installed into the outer cold screen prototype at the next workstation, forming the cold screen.

[0041] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for welding a vertical plate and frame to a cold-screen display, characterized in that, include: A base has a vertical rod fixed at its top center. The side wall of the vertical rod is equipped with a first positioning mechanism, a second positioning mechanism, and a third positioning mechanism. The first and second positioning mechanisms work together to position the vertical plate of the cold screen, while the third positioning mechanism positions the upper cover plate of the cold screen, thus assisting the welding operation. The first positioning mechanism includes: A lifting sleeve is fitted onto the side wall of a vertical rod. A mounting ring is fixedly fitted onto the outer wall of the lifting sleeve. A drive mechanism for raising and lowering the lifting sleeve is provided on the side wall of the base. A ring-shaped array of fixing components is arranged on the top of the mounting ring. The fixing components include: The first rotating rod is rotatably mounted on the top of the mounting ring and is symmetrically arranged with respect to the center point of the mounting ring. A support plate is fixedly sleeved on the middle of the side wall of the first rotating rod. A connecting plate is movably mounted on the end of the support plate away from the first rotating rod. An elastic abutment is fixedly mounted on the side of the connecting plate away from the support plate. A first electromagnet is fixedly mounted at the center and on both sides of the side of the elastic abutment away from the connecting plate.

2. The welding fixture for cold-screen vertical plate and frame according to claim 1, characterized in that, The fixing component also includes: The mounting slots are located on the top two sides of the connecting plate. The inner wall of the mounting slots is designed to be inclined. The inner wall of the mounting slots away from the center of the connecting plate is fixed with spaced baffles. The bent plate is fixed on both sides of the elastic abutment and extends into the mounting groove. The bent plate is designed to be inclined, and the inclination angle is close to the inclination angle of the inner wall of the mounting groove on one side of the abutment. The bend of the bent plate tends to move closer to the abutment, and the bend of the bent plate can deform to limit the deformation of the elastic abutment.

3. The welding fixture for cold-screen vertical plate and frame according to claim 2, characterized in that, The fixing component also includes: The fixing rods are fixedly installed on the side of the connecting plate near the elastic abutment and are arranged at intervals. The side of the fixing rods away from the connecting plate is fixedly connected to the elastic abutment to limit the center of the elastic abutment. An airbag is fixedly installed on the side of the connecting plate near the elastic abutment and sleeved on the outside of the fixing rod, so as to control the deformation of the elastic abutment by the expansion of the airbag.

4. The welding fixture for cold-screen vertical plate and frame according to claim 3, characterized in that, The fixing component also includes: The first groove is formed on the side of the support plate near the connecting plate. The inner wall of the first groove is provided with a second groove. The inner wall of the second groove is fixedly provided with a second electromagnet. The inner wall of the second groove is fitted with a third electromagnet. The sides of the third electromagnet and the second electromagnet that are close to each other are the same magnetic poles. The third electromagnet and the second electromagnet are both designed in a ring shape. The inner wall of the second groove is fitted with a spring, and the spring is located on the side of the third electromagnet away from the second electromagnet. The connecting rod is fixedly installed on the side of the third electromagnet close to the second electromagnet, and extends along the inner wall of the second electromagnet and the first groove to the outside of the support plate. The end of the connecting rod located outside the support plate is fixedly connected to the connecting plate. The longitudinal section of the connecting rod is designed as a regular hexagon, and the side wall of the connecting rod fits against the inner wall of the first groove.

5. The welding fixture for cold-screen vertical plate and frame according to claim 4, characterized in that, The fixing component also includes: Limiting grooves are provided at the top and bottom of the support plate. First sliders are placed inside the limiting grooves. Support rods are hinged to the sides of the first sliders that are far apart from each other. The ends of the support rods that are far away from the first sliders are fixedly connected to the upper and lower ends of the connecting plate, respectively. A first gear is fixedly sleeved on the lower end of the side wall of the first rotating rod. A second gear that meshes with the two first gears is rotatably provided on the top of the mounting ring. A third gear is fixedly sleeved on the upper end of the side wall of one of the first rotating rods. The first positioning mechanism further includes: The first gear ring is rotatably mounted on the outer wall of the lifting sleeve. The first gear ring meshes with the third gear. The outer wall of the lifting sleeve is fixedly equipped with a first servo motor for driving the first gear ring to rotate.

6. The welding fixture for cold-screen vertical plate and frame according to claim 1, characterized in that, The second positioning mechanism has two parts, located at the top and bottom of the first positioning mechanism respectively. The second positioning mechanism includes: The limiting seat is fixedly installed on the outer wall of the lifting sleeve and arranged in a ring array. The inside of the limiting seat is provided with a first threaded tube, and the inner wall of the first threaded tube is threadedly connected with a first threaded rod. The first threaded tube extends to the outside of the limiting seat. An arc-shaped plate is fixed to the end of the first threaded tube located outside the limit seat by bolts.

7. The welding fixture for cold-screen vertical plate and frame according to claim 6, characterized in that, The second positioning mechanism also includes: The second gear ring is rotatably mounted on the outer wall of the lifting sleeve, and a second servo motor for driving the second gear ring to rotate is fixedly mounted on the outer wall of the lifting sleeve. The second rotating rod is rotatably mounted on the top of the limiting seat and extends into the limiting seat. A fourth gear is fixedly sleeved on the side wall of the end of the second rotating rod outside the limiting seat. The fourth gear meshes with the second gear ring. The second rotating rod is connected to the first threaded rod through a bevel gear.

8. The welding fixture for cold-screen vertical plate and frame according to claim 1, characterized in that, The third positioning mechanism includes: An external threaded sleeve is fitted onto the side wall of a vertical rod, and an internal threaded sleeve is threaded onto the outer wall of the external threaded sleeve. A ring plate is fixedly sleeved on the lower end of the outer wall of the internally threaded sleeve. A fourth electromagnet is fixedly installed on the top of the ring plate. The fourth electromagnet is designed in a ring shape to limit the movement of the upper cover plate.

9. The welding fixture for cold-screen vertical plate and frame according to claim 1, characterized in that, The drive mechanism includes: The third servo motor is fixedly mounted on the side wall of the base. The output shaft of the third servo motor is fixedly mounted with a third rotating rod through a coupling. The third rotating rod is rotatably connected to the base and extends into the base. The third rotating rod is connected to a second threaded rod through a bevel gear transmission. The two ends of the second threaded rod are rotatably connected to the top of the base and the top of the vertical rod, respectively. An installation through hole is provided at the bottom of the vertical rod, and a sliding through groove is provided on the side wall of the vertical rod, and the sliding through groove is connected to the installation through hole.

10. The welding fixture for cold-screen vertical plate and frame according to claim 9, characterized in that, The drive mechanism also includes: The second threaded tube is threaded to the side wall of the second threaded rod, and the side wall of the second threaded rod is threaded to the third threaded tube. Both the second threaded tube and the third threaded tube are fitted into the mounting through hole. The sliding plate is fixedly installed on both sides of the outer wall of the second and third threaded tubes, and is fixedly connected to the inner wall of the external threaded sleeve and the inner wall of the lifting sleeve, respectively.

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