A welding device for processing a gravure roll

Abstract

The application provides a welding device for processing a gravure roller, and belongs to the technical field of welding devices.The welding device for processing the gravure roller comprises a workbench, a roller placed on the workbench, guide benches rotatably arranged on both sides of the workbench, and a supporting assembly arranged on the workbench and used for supporting the roller, and further comprises a clamping and fixing assembly arranged on the workbench, wherein the clamping and fixing assembly comprises a clamping frame slidably arranged on the guide bench, an adjusting ring rotatably arranged on one side of the clamping frame close to the roller, and a limiting assembly arranged on the adjusting ring.The initial misalignment of the edge to be welded after the roller is rolled can be forcibly corrected through the cooperative adjustment of the insertion positioning of the tapered block in the correcting assembly and the clamping and fixing assembly, the end faces on both sides of the welding seam are aligned and the width is uniform, the problems of uneven welding seam width and uneven side face caused by inaccurate rolling of the roller are effectively solved, and the positioning accuracy before welding is significantly improved.

Description

Technical Field

[0001] This invention belongs to the technical field of welding equipment, and specifically relates to a welding device for processing gravure printing rollers. Background Technology

[0002] Gravure printing rollers are the core component of gravure printing. They are cylindrical metal rollers with engraved or etched recessed cells on their surface, used to store and transfer ink. Welding equipment for gravure printing rollers is specialized equipment used in their manufacture. Its main function is to roll flat steel plates into a cylindrical shape and then use welding technology to firmly fuse the seams, forming a seamless cylindrical tube, providing a foundation for subsequent fine processing.

[0003] Chinese Patent CN119973511B discloses a printing plate roller welding device, including a main body, a movable slide, a first support frame, a second support frame, a welding machine, and welding equipment. It also includes a rotating mechanism, a centering clamping mechanism, and a centering alignment mechanism. The centering alignment mechanism comprises an installation component, an installation support, a centering alignment component, and an adjustment component. Through the movable slide and the rotating mechanism, the centering alignment mechanism can not only quickly center the printing plate roller and the roller core, ensuring their coaxiality and reducing manual intervention, but also drive the end cap and the printing plate roller to rotate intermittently, allowing the welding equipment to perform preliminary spot welding on the ends of the end cap and the printing plate roller. The centering clamping mechanism, through the movable slide and the rotating mechanism, can not only center and clamp the printing plate roller, ensuring that both ends of the printing plate roller are in a concentric position, but also drive the clamped printing plate roller to rotate circumferentially, enabling the welding equipment to continuously weld the ends of the printing plate roller.

[0004] However, the above technical solution still has the following defects. The solution can only achieve the center positioning of the printing roller and the roller core, but it does not force the correction of the misalignment of the edge to be welded after rolling. It cannot align the two sides of the printing roller rolled into a cylindrical shape and the weld seam, and cannot ensure that the height of the steel plates on both sides of the weld seam is even. During welding, defects such as misalignment and uneven weld seam width are easy to occur, resulting in unevenness on both sides of the printing roller, which makes it difficult to meet the quality requirements of the weld seam when welding the printing roller. Summary of the Invention

[0005] The purpose of this invention is to provide a welding device for gravure printing roller processing, which aims to solve the problem in the prior art that the initial misalignment of the edge to be welded after rolling cannot be forcibly corrected, resulting in uneven weld width and height on both sides, and uneven sides.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding device for processing gravure printing rollers, comprising: a worktable and a printing roller placed on the worktable, guide tables rotatably arranged on both sides of the worktable, and a support assembly for supporting the printing roller on the worktable, and further comprising:

[0007] A clamping and fixing assembly is set on the worktable. The clamping and fixing assembly includes a clamping frame that is slidably set on the guide table. An adjusting ring is rotatably set on the side of the clamping frame near the printing roller. A limiting component is set on the adjusting ring. The limiting component can clamp and limit the two sides of the printing roller. The limiting component includes two sets of arc-shaped guide plates that are rotatably set on the inner side of the adjusting ring. A V-shaped limiting plate is set on the side of the arc-shaped guide plate near the printing roller.

[0008] The correction component is set on the clamping and fixing component. The correction component includes a conical block that is slidably set on the adjusting ring. The conical block is located between two sets of V-shaped limiting plates. A fixing structure is set on the arc-shaped guide plate. The fixing structure can fix and clamp the two sides of the weld seam of the printing roller. A second sensing element is set on the clamping frame, and a second indicator plate is set on the adjusting ring.

[0009] The welding assembly is set on the workbench. The welding assembly is used to weld the seam of the printing roller and adjust the height of both sides of the welding position to be level.

[0010] Its effect is that, through the coordinated work of the clamping and fixing components and the straightening components, precise clamping and positioning of both sides of the printing roller are achieved, and the height of the weld is adjusted by the welding components to ensure that both sides of the weld are flush, thereby improving the welding accuracy and quality.

[0011] A further technical solution of the present invention is that the adjusting ring is provided with ring teeth, the clamping frame is rotatably provided with a first gear that meshes with the ring teeth, the clamping frame is provided with a first driving device for controlling the rotation of the first gear, the arc-shaped guide plate is provided with guide teeth on one side, the adjusting ring is provided with a second gear that meshes with the guide teeth, and the second gear is provided between two sets of guide teeth, and the adjusting ring is provided with a second driving device for controlling the rotation of the second gear.

[0012] A further technical solution of the present invention is that the V-shaped limiting plate is disposed on the side of the arc-shaped guide plate away from the guide teeth, the V-shaped limiting plate is provided with a V-shaped groove, and the V-shaped limiting plate has an arc shape that can adapt to the arc shape of the side of the cylindrical roller. A first indicator plate is slidably disposed on the arc-shaped guide plate. The first indicator plate is located on the side of the V-shaped limiting plate close to the guide teeth. A first sensing element that works in conjunction with the first indicator plate is disposed on the arc-shaped guide plate. An elastic element is disposed on the first indicator plate, and the other end of the elastic element is connected to the arc-shaped guide plate.

[0013] Its effect is that the V-shaped limiting plate is adapted to the curved side of the printing roller, and together with the first indicator plate and the sensing element, it detects the clamping position in real time, ensuring that the two end faces of the printing roller are flush, avoiding welding defects caused by inaccurate positioning, and improving positioning accuracy.

[0014] A further technical solution of the present invention is that the first sensing element is configured as a magnetic induction displacement sensor, the second sensing element is configured as a magnetic induction displacement sensor, and the elastic element is configured as a spring.

[0015] A further technical solution of the present invention is that the conical block is close to the V-shaped limiting plate on the arc-shaped guide plate, and the adjusting ring is provided with a third driving device that can control the reciprocating sliding of the conical block. The fixing structure includes two sets of clamping plates slidably disposed on the arc-shaped guide plate. The two sets of clamping plates after fixing the printing roller are located on both sides of the printing roller and can approach or move away from each other. A sliding column is provided on the side of the clamping plate away from the printing roller. A driving disk is rotatably disposed on the side of the arc-shaped guide plate away from the clamping plate. A sliding groove is provided on the driving disk that slides with the sliding column. One end of the sliding groove is close to the rotation center of the driving disk and the other end is away from the rotation center. A fourth driving device that can control the fixed-axis rotation of the driving disk is provided on the arc-shaped guide plate. The second sensing element is used in conjunction with the second indicator plate.

[0016] Its effect is that the conical block is inserted into the weld for positioning, and together with the clamping plate and drive plate, it achieves forced fixation and clamping of both sides of the weld, effectively correcting the initial misalignment and ensuring that the weld width is uniform.

[0017] A further technical solution of the present invention is that the guide table can rotate along a fixed axis of the worktable. When the guide table is horizontally set, it is used for welding the printing roller. The support assembly includes a support column installed on the guide table. One end of the support column is installed on the guide table on one side of the worktable, and the other end faces the guide table on the other side of the worktable. The diameter of the support column is smaller than the diameter of the printing roller. A threaded rod is rotatably installed inside the support column. The two ends of the threaded rod are provided with external threads with opposite directions. Two annular blocks are threadedly connected to both sides of the threaded rod. When the threaded rod rotates, it can drive the annular blocks on both sides to move closer or further away synchronously. Multiple sets of connecting rods are rotatably connected to one side of the annular blocks. The other end of the connecting rods extends to the outside of the support column. The other end of the corresponding connecting rods on the two annular blocks is connected to a support rod. The support rod is arranged parallel to the support column.

[0018] A further technical solution of the present invention is that the welding assembly includes a welding frame slidably disposed on the worktable, a welding gun disposed on the welding frame, the welding gun being located directly above the weld seam, the welding frame being able to drive the welding gun to move up and down and to move horizontally along the axial direction of the printing roller, two sets of pressure rollers disposed on the welding frame, the pressure rollers being located directly above the weld seam and on the front and rear sides of the direction of movement of the welding gun, and a vision sensor being disposed on the side of the pressure rollers near the welding gun.

[0019] Its effect is that the welding gun and the pressure roller work together, the vision sensor detects the height difference of the weld in real time, and the pressure roller can press down to correct the protruding position, ensuring that the height of the weld is even throughout the entire length of the weld and improving the uniformity of welding.

[0020] A further technical solution of the present invention is that a first driving member is provided on one side inside the support column, which can control the rotation of the threaded rod on a fixed axis; a second driving member is provided inside the worktable, which can control the rotation of the guide table and the reciprocating sliding of the clamping frame; and a third driving member is provided inside the welding frame, which can control the up and down movement of the pressure roller.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention, through the insertion and positioning of the conical block in the correction component and the coordinated adjustment of the clamping and fixing component, can forcibly correct the initial misalignment of the edge to be welded after rolling, so that the two end faces of the weld are aligned and the width is uniform. This effectively solves the problem of uneven weld width and uneven sides caused by inaccurate rolling of the printing roller, and significantly improves the positioning accuracy before welding.

[0023] 2. By using the pressure roller on the welding assembly in conjunction with the vision sensor, the height difference between the two sides of the weld is detected and corrected in real time during the welding process. This avoids local bulging caused by uneven force on the printing roller when only the end is fixed, ensuring that the height of the weld is flat throughout its entire length. This can significantly improve the welding quality and yield of gravure printing rollers. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention;

[0026] Figure 2 This is a partial structural diagram of a specific embodiment of the present invention;

[0027] Figure 3 This is a partial structural diagram of the support component in a specific embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the clamping and fixing component in a specific embodiment of the present invention;

[0029] Figure 5 This is a partial structural diagram of the clamping and fixing component in a specific embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the correction component in a specific embodiment of the present invention;

[0031] Figure 7 This is a partial structural diagram of the correction component in a specific embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the installation structure of the clamping frame, adjusting ring, and arc-shaped guide plate in a specific embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the installation structure of the first indicator plate, clamping plate, and drive disk in a specific embodiment of the present invention;

[0034] Figure 10 This is a schematic diagram of the structure of the clamping plate and the drive disk in a specific embodiment of the present invention;

[0035] Figure 11 This is a partial structural diagram of the welding assembly in a specific embodiment of the present invention.

[0036] In the diagram: 1. Worktable; 11. Guide table; 2. Printing roller; 3. Support assembly; 31. Support column; 32. Threaded rod; 33. Annular block; 34. Connecting rod; 35. Support rod; 4. Clamping and fixing assembly; 41. Clamping frame; 42. Adjusting ring; 421. Ring tooth; 422. First gear; 423. First drive device; 43. Arc-shaped guide plate; 431. Guide tooth; 44. Second gear; 441. Second drive device; 45. 46. ​​V-shaped limiting plate; 46. First indicator plate; 461. First sensing element; 462. Elastic element; 5. Correction assembly; 51. Conical block; 511. Third drive device; 52. Clamping plate; 521. Sliding column; 53. Drive disc; 531. Slide groove; 54. Fourth drive device; 55. Second sensing element; 56. Second indicator plate; 6. Welding assembly; 61. Welding frame; 62. Welding gun; 63. Pressure roller; 64. Vision sensor. Detailed Implementation

[0037] 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.

[0038] Please see Figures 1-11 The present invention provides the following technical solution: a welding device for processing gravure printing rollers, comprising a worktable 1, a printing roller 2, a support assembly 3, a clamping and fixing assembly 4, a straightening assembly 5, and a welding assembly 6.

[0039] Workbench 1 is placed horizontally on the ground to hold the cylindrical printing roller 2 for welding. Support assembly 3 is horizontally positioned on workbench 1, and the printing roller 2 can be fitted onto support assembly 3. Support assembly 3 supports the inner wall of the printing roller 2, ensuring it is horizontal and that the weld seam is at the top. Clamping and fixing assembly 4 is slidably positioned on workbench 1 and located on both sides of support assembly 3. Clamping and fixing assembly 4 clamps and limits the ends of the printing roller 2, ensuring its end faces are flush and preventing unevenness during welding. Correction assembly 5 is positioned on clamping and fixing assembly 4, assisting in correcting the weld seam position of the printing roller 2, ensuring uniform weld width and height during welding. Welding assembly 6 is slidably positioned on workbench 1, located on one side of support assembly 3, and is used for welding the printing roller 2.

[0040] like Figures 1-3 As shown, guide platforms 11 are rotatably mounted on both sides of the worktable 1. The guide platforms 11 can rotate along a fixed axis of the worktable 1 to maintain a horizontal or inclined state. The support assembly 3 includes a support column 31 mounted on the guide platform 11. One end of the support column 31 is mounted on the guide platform 11 on one side of the worktable 1, and the other end faces the guide platform 11 on the other side of the worktable 1. The diameter of the support column 31 is smaller than the diameter of the printing roller 2, allowing the printing roller 2 to be fitted over the support column 31. The angle of the support column 31 can be adjusted by rotating the guide platform 11, facilitating the installation and removal of the printing roller 2. When the guide platform 11 is horizontal, it is used for welding the printing roller 2. A support unit is provided inside the support column 31, which provides initial support for the printing roller 2, ensuring that the axis of the printing roller 2 coincides with the axis of the support column 31. The support unit includes a threaded rod 32 rotatably disposed inside a support column 31. A first driving member (not shown in the figure) is provided on one side inside the support column 31. The first driving member can control the threaded rod 32 to rotate around a fixed axis. The two ends of the threaded rod 32 are provided with external threads with opposite directions of rotation. Two annular blocks 33 are threadedly connected to both sides of the threaded rod 32. When the threaded rod 32 rotates, it can drive the annular blocks 33 on both sides to move closer or further apart synchronously. Multiple sets of connecting rods 34 are rotatably connected to one side of the annular blocks 33. The other end of the connecting rods 34 extends to the outside of the support column 31. Support rods 35 are connected to the other ends of the corresponding connecting rods 34 on the two annular blocks 33, and the support rods 35 are arranged parallel to the support column 31.

[0041] During operation, the cylindrical printing roller 2 is first placed on the support column 31. Then, the threaded rod 32 is rotated by the first driving component. At this time, the annular blocks 33 on both sides of the threaded rod 32 begin to approach each other under the drive of the threaded rod 32, and multiple sets of support rods 35 are driven away from each other by the connecting rod 34 until the support rods 35 contact the inside of the printing roller 2. At this time, the printing roller 2 is supported by the support rods 35 and disengages from the support column 31.

[0042] like Figure 1 and Figures 4-9 As shown, the clamping and fixing assembly 4 includes a clamping frame 41 slidably disposed on the upper surface of the guide table 11. A second driving component (not shown) is disposed inside the worktable 1. The second driving component controls the rotation of the guide table 11 and the reciprocating sliding of the clamping frame 41. When the clamping frame 41 slides along the guide table 11, it can approach or move away from the printing roller 2 placed on the support assembly 3. An adjusting ring 42 is rotatably disposed on the side of the clamping frame 41 closest to the printing roller 2. The adjusting ring 42 has ring teeth 421. A first gear 422, meshing with the ring teeth 421, is rotatably disposed on the clamping frame 41. A first driving device 423 is disposed on the clamping frame 41. The output end of the first driving device 423 is connected to the first gear 422. The first driving device 423 can drive the first gear 422 to rotate, thereby controlling the ring teeth 421 to drive the adjusting ring 42 to rotate synchronously. A limiting component is disposed on the adjusting ring 42. This limiting component can clamp and limit the two sides of the printing roller 2, ensuring that the sides are flush. The limiting assembly includes two sets of arc-shaped guide plates 43 rotatably disposed inside the adjusting ring 42. Guide teeth 431 are provided on one side of each arc-shaped guide plate 43. A second gear 44 is provided on the adjusting ring 42, meshing with the guide teeth 431, and is positioned between the two sets of guide teeth 431. When the second gear 44 rotates, it can drive the two sets of arc-shaped guide plates 43 to rotate synchronously in opposite directions via the guide teeth 431. A second driving device 441 is provided on the adjusting ring 42, and the output end of the second driving device 441 is connected to the second gear 44, allowing the second gear 44 to rotate.

[0043] A V-shaped limiting plate 45 is provided on the side of the arc-shaped guide plate 43 away from the guide teeth 431, and the V-shaped limiting plate 45 is located near the printing roller 2. The V-shaped limiting plate 45 has a V-shaped groove and a certain curvature to adapt to the arc shape of the side of the cylindrical printing roller 2. When the printing roller 2 is supported by the support assembly 3, the clamping frame 41 approaches the printing roller 2, so that both ends of the cylindrical printing roller 2 are inserted into the V-shaped groove of the V-shaped limiting plate 45. A first indicator plate 46 is slidably provided on the arc-shaped guide plate 43, and the first indicator plate 46 is located on the side of the V-shaped limiting plate 45 near the guide teeth 431. A first sensing element 461 is provided on the arc-shaped guide plate 43 to cooperate with the first indicator plate 46. The first sensing element 461 can be set as a magnetic induction displacement sensor. When the first indicator plate 46 slides back and forth along the arc-shaped guide plate 43, the first sensor 461 always corresponds to the first indicator plate 46, and the first sensor 461 can detect the movement position of the first indicator plate 46. An elastic element 462 is provided on the first indicator plate 46, and the other end of the elastic element 462 is connected to the arc-shaped guide plate 43. In the initial state, under the action of the elastic element 462, the first sensor 461 is brought close to the opening end of the V-shaped limiting plate 45. In this embodiment, the elastic element 462 is set as a spring.

[0044] When the clamping and fixing assembly 4 starts working, it first drives the clamping frame 41 to approach the printing roller 2. Then, it adjusts its position through the first driving device 423 and the second driving device 441, so that the V-shaped limiting plates 45 on the two arc-shaped guide plates 43 approach the two sides of the weld seam to be welded on the printing roller 2. Then, the printing roller 2 is inserted into the middle groove of the V-shaped limiting plate 45 and contacts the end of the first indicator plate 46. At the same time as the two clamping frames 41 approach synchronously, the elastic element 462 is compressed, and the printing roller 2 begins to contact the V-shaped groove on the V-shaped limiting plate 45 and is gradually limited. By detecting the movement distance of the two sets of first indicator plates 46 after being compressed and comparing it with the preset position of the first sensing element 461, it can be determined whether the end faces on both sides of the weld seam of the printing roller 2 are flush. If the displacements of the two sets of first indicator plates 46 are different, the two sides of the printing roller 2 may be misaligned. At this time, the clamping frame 41 continues to move to correct the printing roller 2 through the V-shaped limiting plate 45 until the two sets of first indicator plates 46 move the same distance. At this time, the end faces on both sides of the printing roller 2 are flush.

[0045] like Figures 4-10 As shown, the correction assembly 5 includes a conical block 51 slidably disposed on the adjustment ring 42. The conical block 51 is located on one side of the V-shaped limiting plate 45 near the arc-shaped guide plate 43, and two sets of V-shaped limiting plates 45 are symmetrically disposed on both sides of the conical block 51. A third driving device 511 is provided on the adjustment ring 42. The output end of the third driving device 511 is connected to the conical block 51. The third driving device 511 can control the conical block 51 to slide back and forth, moving closer to or away from the printing roller 2.

[0046] Initially, the conical block 51 is located at the top of the adjusting ring 42. When the clamping frame 41 approaches the printing roller 2, the third driving device 511 pushes the conical block 51 closer to and inserts it into the weld seam of the printing roller 2, and then aligns the two sides of the printing roller 2. After the two sides of the printing roller 2 are aligned, the conical block 51 continues to be pushed with a fixed thrust until the inclined surfaces on both sides of the conical block 51 are in complete contact with the two sides of the weld seam of the printing roller 2. When it is impossible to push the conical block 51 any further and the thrust reaches the set value, the third driving device 511 stops working. During the pushing process of the conical block 51, the first driving device 423 remains inactive, and the first gear 422 can rotate freely. If the weld seam of the printing roller 2 is inclined along its axial direction, that is, the weld seam is not facing the top of the printing roller 2, then during the movement of the conical block 51, one side of its inclined surface may contact one side of the weld seam of the printing roller 2 first. As the movement continues, the adjusting ring 42 begins to rotate under the action of the extrusion force until the conical block 51 is aligned with the middle position of the weld, that is, at this time the conical block 51 is completely positioned at the center of both sides of the weld of the roller 2.

[0047] A fixing structure is provided on the arc-shaped guide plate 43, which can fix and clamp the two sides of the weld seam of the printing roller 2. The fixing structure includes two sets of clamping plates 52 slidably disposed on the arc-shaped guide plate 43. The two sets of clamping plates 52 after fixing the printing roller 2 are located on both sides of the printing roller 2 and can move closer or further away from each other. A sliding column 521 is provided on the side of the clamping plate 52 away from the printing roller 2. The sliding column 521 passes through the arc-shaped guide plate 43. A drive disk 53 is rotatably disposed on the side of the arc-shaped guide plate 43 away from the clamping plate 52. The drive disk 53 is provided with a sliding groove 531 that slides and engages with the sliding column 521. One end of the sliding groove 531 is close to the rotation center of the drive disk 53 and the other end is away from the rotation center. A fourth drive device 54 is provided on the arc-shaped guide plate 43. The output end of the fourth drive device 54 is connected to the drive disk 53. The fourth drive device 54 can control the rotation of the drive disk 53 on a fixed axis, thereby controlling the relative distance between the two sets of clamping plates 52.

[0048] After the center of both sides of the weld seam of the printing roller 2 is completely positioned by the conical block 51, the weld seam width on both sides of the printing roller 2 may differ, resulting in different insertion distances of the conical blocks 51 on both sides of the printing roller 2. At this time, the fourth drive device 54 controls the drive disk 53 to rotate, thereby driving the clamping plates 52 to move closer together and clamp and fix the printing roller 2. Then, the conical block 51 on the side with the wider weld seam is controlled to move away from the printing roller 2, so that its extension distance is the same as that of the conical block 51 on the other side. Then, the second drive device 441 on that side is activated and controls the arc guide plate 43 to rotate, causing the V-shaped limiting plate 45 to move closer synchronously. The two sides of the weld seam of the printing roller 2 move closer together synchronously under the clamping force of the clamping plate 52, thereby fine-tuning the weld seam width on that side and aligning the originally misaligned or uneven gaps. Then, the conical block 51 on that side is pushed closer to the weld seam again until the printing roller 2 contacts both sides of the conical block 51 synchronously again. At this time, the extension distance of the conical blocks 51 on both sides is the same, and the weld seam width on both sides of the printing roller 2 is consistent. Finally, the conical blocks 51 on both sides are simultaneously pulled out, and the arc-shaped guide plate 43 is controlled to continue rotating. The width of the weld seam at the welding position of the printing roller 2 is adjusted to a suitable size before rotation stops. At this time, the clamping force of the support component 3 can be adjusted synchronously to ensure that the printing roller 2 is always provided with auxiliary support. Under the limiting action of the two sets of symmetrically arranged V-shaped limiting plates 45, the height of the weld seam on both sides of the printing roller 2 can be kept consistent, which facilitates subsequent welding and ensures welding quality.

[0049] A second sensor 55 is provided on the clamping frame 41. The second sensor 55 can be configured as a magnetic displacement sensor. A second indicator plate 56 is provided on the adjusting ring 42 to cooperate with the second sensor 55. When the adjusting ring 42 rotates along the fixed axis of the clamping frame 41, the second sensor 55 and the second indicator plate 56 always correspond. The second sensor 55 can detect the rotation angle of the adjusting ring 42 relative to the clamping frame 41, and thus detect the position of the adjusting ring 42. When the weld width on both sides of the printing roller 2 is consistent, the weld may be tilted so that it does not face directly upwards on the printing roller 2, which can easily cause the weld to tilt during welding. Since the conical block 51 is located in the middle of the weld, when the center position of the weld is located by the conical block 51, causing the adjusting ring 42 to rotate, it is detected by the second sensing element 55. In order to ensure that the weld is directly above for easy welding, the first driving device 423 is started and controls the adjusting ring 42 to rotate in the opposite direction, driving the conical block 51 back to the initial position, that is, the top of the adjusting ring 42, so as to synchronously adjust the weld to the top of the printing roller 2, ensuring that the position of the weld is fixed during welding.

[0050] like Figure 1 , Figure 2 and Figure 11 As shown, the welding assembly 6 includes a welding frame 61 slidably mounted on the worktable 1. A welding gun 62 is mounted on the welding frame 61, positioned directly above the weld seam. The welding frame 61 can move the welding gun 62 up and down and horizontally along the axial direction of the printing roller 2 to weld the weld seam. Two sets of pressure rollers 63 are mounted on the welding frame 61, positioned directly above the weld seam and on the front and rear sides of the welding gun 62's movement direction. A third driving component (not shown) is installed inside the welding frame 61, controlling the up and down movement of the pressure rollers 63. A vision sensor 64 is mounted on the side of the pressure roller 63 closest to the welding gun 62, detecting any height difference between the two sides of the weld seam.

[0051] Once the weld seam position is completely fixed, the welding gun 62 is moved a certain distance above the weld seam using the welding frame 61. Then, the pressure roller 63 is controlled to move down to the weld seam position and contact the printing roller 2. During welding, preliminary spot welding is generally performed first. If the height of both sides of the weld seam is detected to be level by the vision sensor 64, spot welding is performed directly. If they are not level, the pressure roller 63 in the direction of the welding gun 62 is controlled to press down based on the detection result of the vision sensor 64, pre-correcting any weld seam protrusions. Then, the welding gun 62 welds the corrected level area to ensure that the height of both sides of the weld seam is level overall. This avoids the problem of height differences in the weld seam area caused by uneven force when the printing roller 2 is rolled into a cylindrical shape, which affects the welding quality, when only the ends of the printing roller 2 are fixed. Continuous welding is then performed after spot welding. During this time, the vision sensor 64 continues to detect, preventing the edge of the printing roller 2 from being deformed by heat during spot welding, thus avoiding the formation of height differences again. After welding is completed, the printing roller 2 is released, the angle of the guide table 11 is adjusted, and the printing roller 2 is removed. Then, the welding of the next workpiece is carried out.

Claims

1. A welding device for processing gravure printing rollers, comprising: The worktable (1) and the printing roller (2) placed on the worktable (1), with guide platforms (11) rotatably arranged on both sides of the worktable (1), and a support assembly (3) for supporting the printing roller (2) provided on the worktable (1), characterized in that it further includes: A clamping and fixing assembly (4) is set on the worktable (1). The clamping and fixing assembly (4) includes a clamping frame (41) that is slidably set on the guide table (11). An adjusting ring (42) is rotatably set on the side of the clamping frame (41) near the printing roller (2). A limiting assembly is set on the adjusting ring (42) to clamp and limit the two sides of the printing roller (2). The limiting assembly includes two sets of arc-shaped guide plates (43) that are rotatably set inside the adjusting ring (42). A V-shaped limiting plate (45) is set on the side of the arc-shaped guide plate (43) near the printing roller (2). The correction component (5) is set on the clamping and fixing component (4). The correction component (5) includes a conical block (51) slidably set on the adjusting ring (42). The conical block (51) is located between two sets of V-shaped limiting plates (45). The arc-shaped guide plate (43) is provided with a fixing structure, which can fix and clamp the two sides of the weld of the printing roller (2). The clamping frame (41) is provided with a second sensing element (55), and the adjusting ring (42) is provided with a second indicator plate (56). Welding assembly (6) is set on workbench (1). Welding assembly (6) is used to weld the weld seam of the printing roller (2) and adjust the height of both sides of the welding position to be even. The adjusting ring (42) is provided with ring teeth (421), the clamping frame (41) is rotatably provided with a first gear (422) that meshes with the ring teeth (421), the clamping frame (41) is provided with a first drive device (423) for controlling the rotation of the first gear (422), the arc-shaped guide plate (43) is provided with a guide tooth (431) on one side, the adjusting ring (42) is provided with a second gear (44) that meshes with the guide tooth (431), and the second gear (44) is provided between the two sets of guide teeth (431). The adjusting ring (42) is provided with a second drive device (441) for controlling the rotation of the second gear (44). The V-shaped limiting plate (45) is set on the side of the arc-shaped guide plate (43) away from the guide teeth (431). The V-shaped limiting plate (45) has a V-shaped groove and is arc-shaped, which can adapt to the arc shape of the side of the cylindrical roller (2). The arc-shaped guide plate (43) is slidably provided with a first indicator plate (46). The first indicator plate (46) is located on the side of the V-shaped limiting plate (45) close to the guide teeth (431). The arc-shaped guide plate (43) is provided with a first sensing element (461) that works with the first indicator plate (46). The first indicator plate (46) is provided with an elastic element (462). The other end of the elastic element (462) is connected to the arc-shaped guide plate (43). The conical block (51) is close to the V-shaped limiting plate (45) on the arc-shaped guide plate (43). The adjusting ring (42) is equipped with a third driving device (511) that can control the reciprocating sliding of the conical block (51). During the pushing process of the conical block (51), the first driving device (423) remains in a non-working state, and the first gear (422) can rotate freely. The fixing structure includes two sets of clamping plates (52) that are slidably set on the arc-shaped guide plate (43). The two sets of clamping plates (52) after fixing the printing roller (2) are located on both sides of the printing roller (2) and can approach or move away from each other. A sliding column (521) is provided on the side of the plate (52) away from the printing roller (2). A drive disk (53) is rotatably provided on the side of the arc-shaped guide plate (43) away from the clamping plate (52). A sliding groove (531) is provided on the drive disk (53) to slide in cooperation with the sliding column (521). One end of the sliding groove (531) is close to the rotation center of the drive disk (53) and the other end is away from the rotation center. A fourth drive device (54) is provided on the arc-shaped guide plate (43) to control the fixed-axis rotation of the drive disk (53). The second sensing element (55) is used in conjunction with the second indicator plate (56).

2. The welding device for processing gravure printing rollers according to claim 1, characterized in that: The first sensing element (461) is configured as a magnetic induction displacement sensor, the second sensing element (55) is configured as a magnetic induction displacement sensor, and the elastic element (462) is configured as a spring.

3. The welding device for processing gravure printing rollers according to claim 1, characterized in that: The guide table (11) can rotate along a fixed axis of the worktable (1). When the guide table (11) is set horizontally, it is used for welding the printing roller (2). The support assembly (3) includes a support column (31) mounted on the guide table (11). One end of the support column (31) is mounted on the guide table (11) on one side of the worktable (1), and the other end faces the guide table (11) on the other side of the worktable (1). The diameter of the support column (31) is smaller than the diameter of the printing roller (2). A threaded rod (32) is rotatably provided inside the support column (31). 32) Both ends are provided with external threads with opposite directions of rotation. Two annular blocks (33) are threadedly connected to both sides of the threaded rod (32). When the threaded rod (32) rotates, it can drive the annular blocks (33) on both sides to move closer or further away synchronously. Multiple sets of connecting rods (34) are rotatably connected to one side of the annular block (33). The other end of the connecting rod (34) extends to the outside of the support column (31). The other end of the corresponding connecting rod (34) on the two annular blocks (33) is connected to a support rod (35). The support rod (35) is set parallel to the support column (31).

4. The welding device for processing gravure printing rollers according to claim 3, characterized in that: The welding assembly (6) includes a welding frame (61) slidably mounted on the worktable (1). A welding gun (62) is mounted on the welding frame (61). The welding gun (62) is located directly above the weld. The welding frame (61) can drive the welding gun (62) to move up and down and to move horizontally along the axial direction of the printing roller (2). Two sets of pressure rollers (63) are mounted on the welding frame (61). The pressure rollers (63) are located directly above the weld and are located on the front and rear sides of the direction of movement of the welding gun (62). A vision sensor (64) is mounted on the side of the pressure roller (63) closest to the welding gun (62).

5. The welding device for processing gravure printing rollers according to claim 4, characterized in that: The support column (31) has a first driving component on one side inside, which can control the threaded rod (32) to rotate on a fixed axis. The worktable (1) has a second driving component inside, which can control the rotation of the guide table (11) and the reciprocating sliding of the clamping frame (41). The welding frame (61) has a third driving component inside, which can control the pressure roller (63) to move up and down.

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