A steel roller laser welding machine

Abstract

The application relates to the technical field of welding, and provides a steel roller laser welding machine, which comprises a rack, a welding unit installed on the rack, a supporting roller and a clamping unit, the steel roller is sleeved on the outer wall of the supporting roller, the welding unit is used for welding the weld of the steel roller, the clamping unit is two groups and is used for clamping the axial two ends of the steel roller, the supporting roller is sleeved with two sliding rings which can slide along the axial direction, the two sliding rings are arranged at the two ends of the steel roller, an outer ring is rotatably installed on the outer periphery of the sliding ring, the outer ring is provided with a correction sheet which can radially expand and contract, the correction sheet is used for inserting the weld of the steel roller, the sliding ring is provided with a reference positioning groove for inserting the correction sheet, and the reference positioning groove is located on the welding track of the welding unit. The steel roller laser welding machine provided by the application eliminates the error caused by manual visual judgment and indirect measurement, and improves the adjustment efficiency.

Description

Technical Field

[0001] This application relates to the field of welding technology, and in particular to a laser welding machine for steel rollers. Background Technology

[0002] Printing rollers are typically long, thin-walled steel rollers, mainly made by rolling long strips of steel into a cylindrical shape and then welding the longitudinal seams. Because these rollers are long and relatively thin, their overall rigidity is insufficient, making them prone to deformation during rolling and welding. To ensure sufficient support and positioning of the rolled steel roller during welding, it is usually necessary to mount the steel roller on the outer wall of a support roller, using the support roller for internal support and centering.

[0003] During the welding process, the laser welding head usually travels along a preset straight trajectory, and theoretically, the longitudinal weld seam of the steel roller should always be on this welding trajectory. However, due to factors such as the springback of the steel roller, the actual weld seam of the steel roller is prone to shift in the circumferential position, causing the laser beam to be unable to accurately act on the joint to be welded, resulting in welding defects such as incomplete fusion and weld misalignment.

[0004] To address the aforementioned weld misalignment issue, the commonly used on-site approach is as follows: after operators detect the weld misalignment by measurement or visual inspection, they manually tap or pry the area near the weld on the steel roller to force the steel roller to undergo a slight circumferential rotation or local deformation relative to the support roller, thereby realigning the weld.

[0005] However, during the manual tapping or prying correction process, it is usually necessary for operators to repeatedly measure and confirm whether the weld has returned to the welding trajectory, which is cumbersome and inconvenient and needs to be improved. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides a steel roller laser welding machine.

[0007] The steel roller laser welding machine provided in this application adopts the following technical solution: A steel roller laser welding machine includes a frame, a welding unit mounted on the frame, a support roller, and a clamping unit. The steel roller is sleeved on the outer wall of the support roller. The welding unit is used to weld the weld seam of the steel roller. The clamping unit consists of two sets, which are used to clamp the axial ends of the steel roller respectively. The support roller is fitted with two sliding rings that can slide axially, and the two sliding rings are respectively placed at both ends of the steel roller; an outer ring is rotatably mounted on the outer circumference of the sliding ring, and the outer ring is provided with a radially expandable correction plate, which is used to insert into the weld of the steel roller; the sliding ring is provided with a reference positioning groove for the correction plate to be inserted, and the reference positioning groove is located on the welding trajectory of the welding unit.

[0008] By adopting the above technical solution, the rolled steel roller is inserted into the outer wall of the steel roller from one end of the support roller; the two sliding rings are pushed to move along the axial direction of the support roller, so that the two sliding rings stop at the axial weld gap of the steel roller, and the end of the correction plate is inserted into the weld gap of the steel roller; at this time, the correction plate and the actual weld of the steel roller form an interlocking relationship, and the correction plate can represent the circumferential position of the weld.

[0009] As the outer ring continues to rotate, the correction piece drives the steel roller to rotate circumferentially relative to the support roller through the weld gap. When the correction piece is embedded in the preset reference positioning groove on the sliding ring, the reference positioning groove is located on the welding trajectory of the welding unit. Therefore, the weld is about to be accurately aligned with the welding trajectory. This eliminates the errors caused by manual visual judgment and indirect measurement, and improves the adjustment efficiency.

[0010] Perform the above operations on both ends of the steel roller to align the weld seams at both ends with the welding trajectory of the welding unit, thus ensuring that the entire longitudinal weld seam is in the welding position. Activate the two sets of clamping units to grip both axial ends of the steel roller, locking its circumferential and axial positions to prevent deflection or movement during subsequent welding. Drive the correction plate to retract radially outward, disengaging it from the steel roller weld seam and preventing interference with the welding process.

[0011] Optionally, an annular rotation space is formed between the sliding ring and the outer ring. The rotation space is provided with a rotating part, which is slidably installed in the annular rotation space along the circumference of the sliding ring. A telescopic part is movably installed in the rotating part along the radial direction of the sliding ring. The rotating part is provided with a first spring for forcing the telescopic part to move toward one side of the sliding ring. The telescopic part has an active hole for the calibration piece to pass through. The calibration piece is provided with a limit rod, which is used to abut against the side of the telescopic part near the sliding ring.

[0012] By adopting the above technical solution, when the calibration piece rotates to the corresponding circumferential position of the reference positioning groove, the first spring releases its elastic force, pushing the telescopic part to move radially toward the sliding ring side, thereby causing the calibration piece to automatically spring into the reference positioning groove, achieving automatic fault-tolerant alignment.

[0013] During this process, operators do not need to precisely control the rotation angle of the outer ring. They only need to rotate it to the approximate position, and the spring will automatically push the calibration plate into the reference positioning slot to complete the alignment, which greatly reduces the operation accuracy requirements and improves the calibration efficiency.

[0014] Optionally, a movable block is movably installed in the reference positioning groove, and the sliding ring is provided with a movable component for driving the movable block to slide within the reference positioning groove. The movable block has a first state, a second state, and a third state. When the movable block is in the first state, its outer wall is flush with the outer wall of the sliding ring; when the movable block is in the second state, it retracts radially into the reference positioning groove, which forms a semi-deep groove for partial insertion of the calibration piece; when the movable block is in the third state, it further retracts radially into the reference positioning groove, the outer end face of the calibration piece does not protrude from the outer surface of the outer ring, and the calibration piece still maintains its insertion fit with the outer ring; the movable component is used to switch the first, second, or third state of the movable block.

[0015] By adopting the above technical solution, when the movable block is switched to the first state by the movable component, the outer wall of the movable block is flush with the outer wall of the sliding ring, and there is no protruding structure. This ensures that the outer ring and the calibration plate slide smoothly without any obstruction, and there will be no scraping phenomenon, thus ensuring the stability of the equipment operation.

[0016] Switch the movable block to the second state. At this time, the movable block retracts a certain distance into the reference positioning groove, making the reference positioning groove a semi-deep groove. After the correction plate rotates to the designated position, it can first be partially inserted into this semi-deep groove, which facilitates the correction plate to perform preliminary correction of the steel roll weld, improving the accuracy and efficiency of the correction.

[0017] Switching the movable block to the third state can prevent it from obstructing the welding operation during the welding process, ensuring that the welding work proceeds smoothly.

[0018] Optionally, the movable block is provided with a first magnetic absorbing piece on the side near the calibration piece, and the calibration piece is provided with a second magnetic absorbing piece for cooperating with the first magnetic absorbing piece.

[0019] By adopting the above technical solution, during the process of the movable block switching from the second state to the third state, the first magnetic absorbing piece on the movable block and the second magnetic absorbing piece on the correction piece magnetically attract each other, which can smoothly bring the correction piece into the reference positioning groove, thereby ensuring the smooth progress of the steel roll weld seam correction and welding work of the steel roll laser welding machine.

[0020] Optionally, the movable component includes a movable rod and a movable hole. The movable hole is opened on the side wall of the sliding ring and communicates with the reference positioning groove. The opening direction of the movable hole is set in the same direction as the radial direction of the sliding ring. The movable rod is slidably installed on the side wall of the movable block. One end of the movable rod passes through the movable hole and is exposed to the outside. The sliding direction of the movable rod is staggered with the extension direction of the movable hole. The sidewall of the movable hole is provided with a first positioning groove, a second positioning groove, and a third positioning groove for the insertion of the movable rod. When the movable rod is inserted into the first positioning groove, the movable block is in a first state; when the movable rod is inserted into the second positioning groove, the movable block is in a second state; and when the movable rod is inserted into the third positioning groove, the movable block is in a third state.

[0021] By adopting the above technical solution, when it is necessary to switch the state of the movable block, the operator can move the movable rod exposed on the side wall of the sliding ring, causing the movable rod to slide radially along the movable hole. After aligning the movable rod with the corresponding positioning slot, it is engaged, realizing the switching of the movable block state. The three positioning slots correspond to three clear working states, and the gear boundaries are clear, allowing the operator to intuitively judge the current state of the movable block, thereby reducing the occurrence of misoperation and improving the ease of use and stability of the steel roller laser welding machine.

[0022] Optionally, a second spring is provided between the movable block and the reference positioning groove, and the elastic force of the second spring is used to force the movable block to move toward one side of the reference positioning groove.

[0023] By adopting the above technical solution, the stability of the active block in the third state is increased.

[0024] Optionally, the ends of the first and second positioning grooves away from the movable hole are inclined toward the side of the sliding ring axis.

[0025] By adopting the above technical solution, the first positioning groove and the second positioning groove are inclined at the end away from the movable hole towards the side of the sliding ring axis, so that the positioning groove has an inclined groove bottom. The inclined groove bottom can form a reverse limit, so that the movable rod cannot be dislodged from the positioning groove radially by itself, thereby achieving a self-locking effect. It can stably keep the movable block in the first state or the second state, ensure the stability after the movable block state is switched, and improve the reliability of equipment operation.

[0026] Optionally, the clamping unit includes a lifting plate mounted on the sliding ring and a clamping plate slidably mounted on the lifting plate, with a steel roller clamped between the clamping plate and the sliding ring; the lifting plate is threaded with a screw, one end of which is rotatably connected to the clamping plate.

[0027] By adopting the above technical solution, the steel roller can be clamped between the clamping plate and the sliding ring by using the lifting plate installed on the sliding ring and the clamping plate slidably installed on the lifting plate. By using the screw threaded on the lifting plate and rotatably connected to the clamping plate at one end, the position of the clamping plate can be easily adjusted to achieve reliable clamping of the steel roller, avoid the steel roller from shaking during the welding process, and improve welding stability and welding quality.

[0028] Optionally, the clamping block is provided with a rubber layer.

[0029] By adopting the above technical solution and adding a rubber layer, the stability of the steel roller clamping can be increased.

[0030] Optionally, each of the two sliding rings is provided with a telescopic sleeve on the side that is close to each other, and the side wall of the telescopic sleeve away from the support roller is flush with the outer wall of the outer ring; a telescopic rod is movably installed between the two telescopic sleeves.

[0031] By adopting the above technical solution, the sliding ring can drive the correction piece to be clamped in the weld of the steel roller.

[0032] In summary, this application includes at least one of the following beneficial technical effects: 1. The alignment of the weld is achieved by the mechanical engagement of the correction piece and the reference positioning groove. The operator only needs to judge whether the correction piece is embedded in the positioning groove to confirm that the weld is on the welding trajectory. There is no need to repeatedly measure the position of the weld during the tapping correction process, which significantly simplifies the correction operation and improves the alignment accuracy and welding efficiency. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of Example 1; Figure 2 This is a schematic diagram of the steel roller sleeved on the support roller in Example 1; Figure 3 yes Figure 1 A magnified view of a portion at point a; Figure 4 This is a partial cross-sectional view of the sliding ring in Embodiment 1, with the moving block in the first state; Figure 5 This is a partial cross-sectional view of the sliding ring in Embodiment 1, with the moving block in the second state; Figure 6 This is a partial cross-sectional view of the sliding ring in Embodiment 1, with the moving block in the third state; Figure 7 This is a schematic diagram of the structure of the active component in Embodiment 1; Figure 8 This is a partial cross-sectional view of the sliding ring in Example 2.

[0034] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Welding unit; 21. Slide rail; 22. Traveling trolley; 23. Laser welding head; 3. Support roller; 4. Clamping unit; 41. Lifting plate; 42. Clamping plate; 43. Screw; 44. Rubber layer; 5. Sliding ring; 51. Telescopic sleeve; 52. Telescopic rod; 53. Annular rotation space; 54. Rotating part; 55. Telescopic part; 56. First spring; 57. Movable rod; 58. Movable sleeve; 59. Reference positioning groove; 6. Outer ring; 61. Mounting hole; 62. Correction plate; 63. Limiting rod; 64. Extension part; 65. Insertion part; 7. Movable block; 71. Movable component; 72. Movable rod; 73. Movable hole; 74. First positioning groove; 75. Second positioning groove; 76. Second spring; 8. Rotating ring; 81. First threaded groove; 82. Second threaded groove; 83. Bolt. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail. Example 1:

[0036] This application discloses a steel roller laser welding machine.

[0037] Reference Figure 1 and Figure 2 A steel roller laser welding machine includes a frame 1, a welding unit 2, a support roller 3, and a clamping unit 4. The frame 1 supports all components of the welding machine. The welding unit 2 is mounted on the frame 1, and the steel roller is sleeved on the outer wall of the support roller 3. The welding unit 2 is used to weld the weld seam of the steel roller. The two sets of clamping units 4 are used to clamp the two ends of the steel roller axially to ensure the stability of the steel roller during the welding process and to avoid shaking that affects the welding quality.

[0038] The laser unit includes a slide rail 21 mounted on the frame 1, a traveling trolley 22 mounted on the slide rail 21, and a laser welding head 23 mounted on the traveling trolley 22. The traveling trolley 22 can drive the laser welding head 23 to move along the length of the slide rail 21, and the laser welding head 23 can emit a laser beam to achieve welding of the steel roll weld.

[0039] Reference Figure 1The support roller 3 is mounted on the frame 1 via a mounting bracket, with its extension direction aligned with the length direction of the slide rail 21. The support roller 3 is fitted with two sliding rings 5 ​​that can only slide axially. The two sliding rings 5 ​​are positioned at both ends of the steel roller. Two sets of clamping units 4 are provided and installed on the two sliding rings 5 ​​respectively. A telescopic sleeve 51 is provided on the side of each sliding ring 5 closest to it. The side wall of the telescopic sleeve 51 away from the support roller 3 is flush with the sliding ring 5. A telescopic rod 52 is movably installed between the two telescopic sleeves 51. The combination of the telescopic sleeves 51 and the telescopic rod 52 can be adjusted according to the length of the steel roller to facilitate clamping of both ends of the steel roller by the two sets of clamping units 4.

[0040] Reference Figure 2 An outer ring 6 is rotatably mounted on the outer circumference of the sliding ring 5, forming an annular rotation space 53 between the sliding ring 5 and the outer ring 6. The outer ring 6 has a mounting hole 61 communicating with the annular rotation space 53, and a correction plate 62 is movably mounted in the mounting hole 61. The correction plate 62 is used to insert into the weld of the steel roller. In other embodiments, the sliding ring 5 is provided with a motor for driving the outer ring 6 to rotate. In this embodiment, one end of the outer ring 6 is provided with an extension 64, and the extension direction of the extension 64 is arranged in the same direction as the extension direction of the support roller 3. The outer ring 6 is driven to rotate by striking the extension 64.

[0041] Reference Figure 3 The rotating space is provided with a rotating part 54, which is slidably installed in the annular rotating space 53 along the circumference of the sliding ring 5. A telescopic part 55 is movably installed in the rotating part 54 along the radial direction of the sliding ring 5. The rotating part 54 is provided with a first spring 56 for forcing the telescopic part 55 to move toward one side of the sliding ring 5. A movable rod 7257 is provided at one end of the telescopic part 55, and a movable sleeve 58 is provided in the rotating part 54 to slide and cooperate with the movable rod 7257. The cooperation between the movable rod 7257 and the movable sleeve 58 prevents relative sliding between the telescopic part 55 and the rotating part 54 along the circumference of the sliding ring 5.

[0042] The telescopic part 55 has an opening 73 for the calibration piece 62 to pass through. The calibration piece 62 is provided with a limiting rod 63, which is used to abut against the side of the telescopic part 55 near the sliding ring 5. The function of the limiting rod 63 is to limit the extension length of the calibration piece 62, and at the same time, it can force the calibration piece 62 to move toward the sliding ring 5 when the telescopic part 55 moves toward the sliding ring 5.

[0043] The sliding ring 5 has a reference positioning groove 59 that communicates with the annular rotation space 53. The base positioning groove is located on the welding trajectory of the laser welding head 23. In order to achieve precise alignment between the reference base positioning groove and the welding trajectory, after the sliding ring 5 is fitted onto the support roller 3, the sliding ring 5 is rotated circumferentially so that the center line of the reference positioning groove 59 is located directly below the laser welding head 23 of the welding unit 2. After adjustment, the sliding ring 5 is installed on the support roller 3 to avoid relative rotation between the support rollers 3 and to ensure that the sliding ring 5 can slide axially.

[0044] Under normal conditions, one end of the calibration plate 62 abuts against the inner wall of the rotation space under the elastic force of the first spring 56; when the outer ring 6 rotates, it will drive the rotating part 54 and the calibration plate 62 to rotate, and when the calibration plate 62 is positioned directly opposite the reference positioning groove 59, the elastic force of the first spring 56 can drive the calibration plate 62 to be inserted into the base positioning groove.

[0045] Reference Figure 4 , Figure 5 and Figure 6 A movable block 7 is movably installed in the reference positioning groove 59. The sliding ring 5 is provided with a movable component 71 for driving the movable block 7 to slide within the reference positioning groove 59. The movable block 7 has a first state, a second state, and a third state. When the movable block 7 is in the first state, the outer wall of the movable block 7 is flush with the outer wall of the sliding ring 5, and the movable block 7 pushes out the correction piece 62. When the movable block 7 is in the second state, the movable block 7 is radially retracted into the reference positioning groove 59, and the reference positioning groove 59 forms a semi-deep groove for partial insertion of the correction piece 62. When the movable block 7 is in the third state, the movable block 7 is further radially retracted into the reference positioning groove 59, the outer end face of the correction piece 62 does not protrude from the outer surface of the outer ring 6, and the correction piece 62 still maintains the insertion fit with the outer ring 6. The movable component 71 is used to switch the first state, the second state, or the third state of the movable block 7.

[0046] In other embodiments, in order to increase the stability of the fitting between the calibration piece 62 and the outer ring 6, the inner wall of the outer ring 6 is provided with two insertion portions 65, and the piece is inserted between the two insertion portions 65.

[0047] The movable component 71 includes a movable rod 7257 and a movable hole 73. The movable hole 73 is formed in the side wall of the sliding ring 5 and communicates with the reference positioning groove 59. The opening direction of the movable hole 73 is the same as the radial direction of the sliding ring 5. The movable rod 7257 is slidably mounted on the side wall of the movable block 7, and one end of the movable rod 7257 passes through the movable hole 73 and is exposed to the outside. The sliding direction of the movable rod 7257 is intersected with the extension direction of the movable hole 73.

[0048] Reference Figure 3 and Figure 7The side wall of the movable hole 73 is provided with a first positioning groove 74, a second positioning groove 75 and a third positioning groove for the insertion of the movable rod 7257. The ends of the first positioning groove 74 and the second positioning groove 75 away from the movable hole 73 are inclined toward the axis of the sliding ring 5. When the movable rod 7257 is inserted into the first positioning groove 74, the movable block 7 is in the first state. When the movable rod 7257 is inserted into the second positioning groove 75, the movable block 7 is in the second state. The third positioning groove is located at one end of the movable hole 73. When the movable rod 7257 is inserted into the third positioning groove, the movable block 7 is in the third state.

[0049] Reference Figure 4 A second spring 76 is provided between the movable block 7 and the reference positioning groove 59. The elastic force of the second spring 76 is used to force the movable block 7 to move toward one side of the reference positioning groove 59. The elastic force of the second spring 76 can improve the stability of the movable rod 7257 inserted into the positioning groove and prevent the movable rod 7257 from entering the movable hole 73 when the outer ring 6 is rotated.

[0050] Reference Figure 4 The clamping unit 4 includes a lifting plate 41 mounted on the sliding ring 5 and a clamping plate 42 slidably mounted on the lifting plate 41. The steel roller is clamped between the clamping plate 42 and the sliding ring 5. The lifting plate 41 is threaded with a screw 43, one end of which is rotatably connected to the clamping plate 42.

[0051] When the screw 43 is rotated, due to the threaded engagement between the screw 43 and the lifting plate 41, the screw 43 will drive the clamping plate 42 to slide on the lifting plate 41, thereby clamping or releasing the steel roller. A rubber pad is provided on the side of the clamping plate 42 near the steel roller to increase friction while avoiding damage to the surface of the steel roller.

[0052] The working steps of the above-mentioned steel roll laser welding machine are as follows: S1 Lifting the Steel Roller: Use the workshop lifting equipment to lift the steel roller and slowly move it to the end of the support roller 3, aligning the inner hole of the steel roller with the outer wall of the support roller 3. Insert the steel roller axially into the support roller 3, but at this time, the lifting equipment does not release the full load, keeping the steel roller in a slightly suspended state.

[0053] S2 Correction plate 62 is inserted into the weld: With the steel roller suspended, the two sliding rings 5 ​​are pushed along the axis of the support roller 3 towards both ends of the steel roller; during this stage, the movable block 7 remains in the first state and can be manually rotated to make the extension 64 on the outer ring 6 roughly aligned with the longitudinal weld gap of the steel roller.

[0054] Then push the sliding ring 5 radially inward to insert the correction piece 62 into the weld gap; after confirming that the correction piece 62 has been reliably inserted into the weld, slowly release the hoisting equipment and lower the steel roller completely so that the inner wall of the steel roller falls smoothly onto the outer wall of the telescopic sleeve 51.

[0055] S3 Correcting the weld: Move the movable rod 7257 to disengage it from the first positioning groove 74, slide it radially along the movable hole 73, and insert it into the second positioning groove 75. At this time, the movable block 7 switches to the second state, and the movable block 7 retracts radially. The reference positioning groove 59 forms a semi-deep groove, providing initial accommodation space for the correction piece 62.

[0056] At this time, the outer ring 6 continues to rotate, and the correction plate 62 drives the steel roller to deflect circumferentially; when the correction plate 62 rotates to be directly aligned with the reference positioning groove 59, the first spring 56 releases its elastic force, pushing the telescopic part 55 and the correction plate 62 to move towards the sliding ring 5, and the end of the correction plate 62 is partially inserted into the semi-deep groove.

[0057] S4 Clamping and Locking: After alignment is completed, rotate screw 43 to press clamping plate 42 against the outer wall of steel roller and lock the position of steel roller.

[0058] S5 Exit Calibration Plate 62: Move the movable lever 7257 again to disengage it from the second positioning groove 75, and continue sliding it along the movable hole 73 to the third positioning groove at the end and engage it. At this time, the movable block 7 switches to the third state, and the movable block 7 retracts further. With the assistance of the cooperation of the first magnetic absorbing plate and the second magnetic absorbing plate, the calibration plate 62 is further brought into the reference positioning groove 59, and the outer end face of the calibration plate 62 does not protrude from the outer surface of the outer ring 6.

[0059] S6 Welding Start: Start the traveling trolley 22, and the laser welding head 23 moves along the slide rail 21 to weld. Since the weld seam is aligned, the welding quality is stable.

[0060] S7 Unloading: After welding is completed, release the clamps and lift out the steel roller. Move the movable rod 7257 back to the first positioning slot 74, so that the movable block 7 returns to the first state, and the equipment is reset and ready for use.

[0061] The implementation principle of a steel roll laser welding machine according to an embodiment of this application is as follows: The alignment of the weld is achieved by the mechanical engagement of the correction piece 62 and the reference positioning groove 59. The operator only needs to determine whether the correction piece 62 is embedded in the positioning groove to confirm that the weld is on the welding trajectory. There is no need to repeatedly measure the position of the weld during the tapping correction process, which significantly simplifies the correction operation and improves the alignment accuracy and welding efficiency. Example 2:

[0062] This application discloses a steel roller laser welding machine.

[0063] Reference Figure 8The difference between Embodiment 2 and Embodiment 1 is that: a rotating ring 8 is rotatably mounted on the sliding ring 5, the clamping unit 4 is mounted on the rotating ring 8, the rotating ring 8 has a first threaded groove 81, the sliding ring 5 has a second threaded groove 82 for communicating with the first threaded groove 81, and the first threaded groove 81 and the second threaded groove 82 are jointly mounted with a bolt 83.

[0064] Since the inner diameter of the steel roller is much larger than the outer diameter of the support roller 3, when the steel roller is fitted onto or removed from the support roller 3, the circumferential locking between the rotating ring 8 and the sliding ring 5 is released by bolt 83. Then, rotating the rotating ring 8 causes the clamping unit 4 mounted on it to rotate synchronously circumferentially, ultimately rotating the clamping unit 4 to the area below the sliding ring 5, where it is housed within the projection range of the annular gap between the steel roller and the support roller 3. At this point, the clamping unit 4 has no radially protruding structure, and no scraping or interference occurs when the steel roller is fitted onto the support roller 3 from the end.

[0065] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A laser welding machine for steel rollers, characterized in that:

1. The device includes a frame (1), a welding unit (2) mounted on the frame (1), a support roller (3), and a clamping unit (4). The steel roller is sleeved on the outer wall of the support roller (3). The welding unit (2) is used to weld the weld seam of the steel roller. The clamping unit (4) consists of two sets and is used to clamp the axial ends of the steel roller respectively. The support roller (3) is fitted with two sliding rings (5) that can slide axially, and the two sliding rings (5) are respectively placed at both ends of the steel roller; an outer ring (6) is rotatably installed on the outer circumference of the sliding ring (5), and the outer ring (6) is provided with a radially expandable correction plate (62), which is used to insert the weld of the steel roller; the sliding ring (5) is provided with a reference positioning groove (59) for the correction plate (62) to be inserted, and the reference positioning groove (59) is located on the welding trajectory of the welding unit (2).

2. The steel roll laser welding machine according to claim 1, characterized in that: An annular rotation space (53) is formed between the sliding ring (5) and the outer ring (6), and the reference positioning groove (59) is opened in the annular rotation space (53). The rotation space is provided with a rotating part (54), which is slidably installed in the annular rotation space (53) along the circumference of the sliding ring (5). The rotating part (54) is movably installed with a telescopic part (55) along the radial direction of the sliding ring (5). The rotating part (54) is provided with a first spring (56) for forcing the telescopic part (55) to move toward the side of the sliding ring (5). The telescopic part (55) is provided with an active hole (73) for the calibration plate (62) to pass through. The calibration plate (62) is provided with a limit rod (63), which is used to abut against the side of the telescopic part (55) near the sliding ring (5).

3. The steel roll laser welding machine according to claim 1, characterized in that: A movable block (7) is movably installed in the reference positioning groove (59). The sliding ring (5) is provided with a movable component (71) for driving the movable block (7) to slide in the reference positioning groove (59). The movable block (7) has a first state, a second state and a third state. When the movable block (7) is in the first state, the outer wall of the movable block (7) is flush with the outer wall of the sliding ring (5); when the movable block (7) is in the second state, the movable block (7) is radially recessed into the reference positioning groove (59), and the reference positioning groove (59) forms a semi-deep groove for partial insertion of the correction piece (62); when the movable block (7) is in the third state, the movable block (7) is further radially recessed into the reference positioning groove (59), the outer end face of the correction piece (62) does not protrude from the outer surface of the outer ring (6), and the correction piece (62) still maintains the insertion fit with the outer ring (6); the movable component (71) is used to switch the first state, the second state or the third state of the movable block (7).

4. A steel roll laser welding machine according to claim 3, characterized in that: The movable block (7) is provided with a first magnetic absorbing piece on the side near the calibration piece (62), and the calibration piece (62) is provided with a second magnetic absorbing piece for cooperating with the first magnetic absorbing piece.

5. A steel roll laser welding machine according to claim 3, characterized in that: The movable component (71) includes movable rods (72) and (57) and movable hole (73). The movable hole (73) is opened on the side wall of the sliding ring (5) and communicates with the reference positioning groove (59). The opening direction of the movable hole (73) is set in the same direction as the radial direction of the sliding ring (5). The movable rods (72) and (57) are slidably installed on the side wall of the movable block (7) in a direction that intersects with the extension direction of the movable hole (73). One end of the movable rods (72) and (57) passes through the movable hole (73) and is exposed to the outside. The sidewall of the movable hole (73) is provided with a first positioning groove (74), a second positioning groove (75) and a third positioning groove for the movable rods (72) and (57) to be inserted. When the movable rods (72) and (57) are inserted into the first positioning groove (74), the movable block (7) is in the first state; when the movable rods (72) and (57) are inserted into the second positioning groove (75), the movable block (7) is in the second state; when the movable rods (72) and (57) are inserted into the third positioning groove, the movable block (7) is in the third state.

6. A steel roll laser welding machine according to claim 5, characterized in that: A second spring (76) is provided between the movable block (7) and the reference positioning groove (59), and the elastic force of the second spring (76) is used to force the movable block (7) to move toward one side of the reference positioning groove (59).

7. A steel roll laser welding machine according to claim 6, characterized in that: The first positioning groove (74) and the second positioning groove (75) are inclined to one side of the axis of the sliding ring (5) at the end away from the movable hole (73).

8. A steel roll laser welding machine according to claim 1, characterized in that: The clamping unit (4) includes a lifting plate (41) installed on the sliding ring (5) and a clamping plate (42) slidably installed on the lifting plate (41). The steel roller is clamped between the clamping plate (42) and the sliding ring (5). The lifting plate (41) is threaded with a screw (43), and one end of the screw (43) is rotatably connected to the clamping plate (42).

9. A steel roll laser welding machine according to claim 8, characterized in that: The clamping block is provided with a rubber layer (44).

10. A steel roll laser welding machine according to claim 1, characterized in that: Each of the sliding rings (5) is provided with a telescopic sleeve (51) on one side that is close to each other. The side wall of the telescopic sleeve (51) away from the support roller (3) is flush with the outer wall of the outer ring (6). A telescopic rod (52) is movably installed between the two telescopic sleeves (51).

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