A laser slitting device for bearing steel pipe machining

Abstract

The application relates to the technical field of laser cutting devices, and discloses a laser slitting device for bearing steel pipe machining, which comprises a workbench, a feeding port is formed in the right side of the workbench, a discharging port is formed in the left side of the workbench, and a laser cutting machine is fixedly installed in the middle of the workbench; a feeding mechanism is arranged on the right part of the workbench, the feeding mechanism is used for conveying straight seam steel pipes, a positioning mechanism is further arranged in the workbench, and the positioning mechanism comprises a chute formed in the workbench. The laser slitting device for bearing steel pipe machining realizes automatic embedding positioning and disengaging of the weld of the straight seam steel pipe, the weld is fixed at a preset angle and then subjected to laser cutting, the cumbersome manual positioning steps are omitted, continuous automatic cutting is realized, the machining time of a single steel pipe is greatly shortened, and the pipe material with a unified angle is provided for subsequent processes, so that the slitting efficiency, machining precision and full-process automation level are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of laser cutting equipment technology, specifically a laser slitting device for processing bearing steel pipes. Background Technology

[0002] As a key raw material for rolling bearings, the processing precision of bearing steel tubes directly affects the bearing's performance and service life. In the manufacturing process of bearing steel tubes, long straight seam steel tubes often need to be cut into several short tubes of predetermined lengths for subsequent processing of bearing rings. A continuous weld seam is formed along the axial direction of the straight seam steel tube surface. During laser slitting, if the weld seam position is not fixed, it will be difficult to avoid the weld seam area or ensure the consistency of the cut position relative to the weld seam during cutting, thus affecting the processing reference for subsequent processes.

[0003] In existing technologies, weld seam positioning typically requires manual observation and adjustment by rotating the steel pipe until the weld seam is aligned with the predetermined position before clamping and cutting. This positioning step must be repeated before cutting each steel pipe, making the operation cumbersome and resulting in long processing times for a single pipe, which is difficult to meet the needs of continuous production. Furthermore, because the weld seam angles of each steel pipe are not uniform after slitting, it is difficult for each station to quickly align according to a unified weld seam orientation when transporting them to subsequent processes such as chamfering, boring, or welding, limiting the realization of fully automated production. Summary of the Invention

[0004] This invention provides a laser slitting device for processing bearing steel pipes, which can automatically complete the alignment and fixation of the weld during the feeding and pushing process, eliminating the operation step of manually adjusting the weld position before cutting each steel pipe, improving production efficiency, and providing pipes with uniform weld angles for subsequent processes. This is beneficial to achieving fully automated production and solves the problems mentioned in the background art.

[0005] The present invention provides the following technical solution: a laser slitting device for processing bearing steel pipes, including a worktable, an inlet on the right side of the worktable, an outlet on the left side of the worktable, and a laser cutting machine fixedly installed in the middle of the worktable; The right side of the workbench is provided with a feeding mechanism for conveying straight seam steel pipes. The workbench is also provided with a positioning mechanism, which includes a slide groove opened in the workbench, a slide seat slidably installed in the slide groove, and a positioning block slidably installed on the slide seat. The positioning block fits with the weld seam on the straight seam steel pipe. The feeding mechanism spirally pushes the straight seam steel pipe toward the center of the worktable. The positioning mechanism causes the positioning block to fit into the weld seam to complete the positioning of the straight seam steel pipe. Then, the positioning mechanism drives the straight seam steel pipe to rotate in order to cooperate with the laser cutting machine to cut the straight seam steel pipe.

[0006] As an optional embodiment of the laser slitting device for processing bearing steel pipes according to the present invention, wherein: the slide is elastically connected to the inner wall of the worktable by a first spring, a limit rod is fixedly installed on the positioning block, the limit rod is slidably connected to the slide, and the limit rod is elastically connected to the slide by a second spring.

[0007] As an optional embodiment of the laser slitting device for processing bearing steel pipes according to the present invention, wherein: a limiting groove is formed in the worktable, and a limiting rod is slidably connected in the limiting groove; the limiting groove includes a first horizontal groove, an inclined groove and a second horizontal groove connected sequentially from right to left, and the height of the first horizontal groove is lower than that of the second horizontal groove.

[0008] As an optional solution of the laser slitting device for processing bearing steel pipes according to the present invention, the feeding mechanism includes a first conveying device and a second conveying device disposed on the workbench. The first conveying device is used to push the straight seam steel pipes one by one onto the slope, and the second conveying device is used to push the straight seam steel pipes rolling down the slope from right to left into the feed inlet. The workbench is provided with a ramp, through which the straight seam steel pipe slides down to the second conveying device, and then the second conveying device pushes the straight seam steel pipe from right to left into the feed inlet.

[0009] As an optional embodiment of the laser slitting device for processing bearing steel pipes according to the present invention, the first conveying device includes a mounting base fixedly installed on the worktable, a slider slidably installed on the mounting base, a push rod fixedly installed on the slider, a first motor provided on the mounting base, a lead screw rotatably installed on the mounting base, the output shaft of the first motor being fixedly connected to the lead screw, and a nut fixedly installed on the slider, the nut being threadedly connected to the lead screw; The structure of the second conveying device is the same as that of the first conveying device.

[0010] As an optional embodiment of the laser slitting device for processing bearing steel pipes according to the present invention, the feeding mechanism further includes a first electric three-jaw chuck and a first rotating component. The first electric three-jaw chuck is used to clamp the straight seam steel pipe, and the first rotating component is used to drive the straight seam steel pipe to rotate.

[0011] As an optional embodiment of the laser slitting device for processing bearing steel pipes according to the present invention, the first electric three-jaw chuck is rotatably mounted on the worktable, and three first jaws are slidably mounted on the first electric three-jaw chuck. The three first jaws perform synchronous radial displacement based on the central axis of the first electric three-jaw chuck to clamp or release the straight seam steel pipe.

[0012] As an optional solution of the laser slitting device for processing bearing steel pipes according to the present invention, wherein: the first rotating component includes a second motor fixedly installed on the worktable, a first gear fixedly installed on the output shaft of the second motor, a connecting ring fixedly installed on the first electric three-jaw chuck, a second gear fixedly installed on the connecting ring, and the second gear meshing with the first gear; The connecting ring is rotatably connected to the first electric three-jaw chuck. An arc-shaped groove is provided on the connecting ring. An arc-shaped block is fixedly installed on the second gear. The arc-shaped block is slidably connected in the arc-shaped groove. The arc-shaped block is elastically connected to the inner wall of the arc-shaped groove through a third spring.

[0013] As an optional solution of the laser cutting device for processing bearing steel pipes according to the present invention, wherein: the elastic support of the third spring causes the arc-shaped block to be located on the counterclockwise side of the arc-shaped groove; When positioning the weld seam on the straight seam steel pipe, the straight seam steel pipe is driven to rotate clockwise by the first rotating component; When cutting the straight seam steel pipe, the first rotating component drives the straight seam steel pipe to rotate counterclockwise.

[0014] As an optional solution of the laser slitting device for processing bearing steel pipes according to the present invention, a second electric three-jaw chuck and a second rotating assembly are fixedly installed on the left side of the worktable. The second electric three-jaw chuck is rotatably connected to the worktable, and three second jaws are slidably installed on the second electric three-jaw chuck. The second rotating assembly includes a third motor fixedly mounted on the worktable, a third gear fixedly mounted on the output shaft of the third motor, and a fourth gear fixedly mounted on the second electric three-jaw chuck, the fourth gear meshing with the third gear.

[0015] The present invention has the following beneficial effects: 1. This laser cutting device for processing bearing steel pipes, by setting a positioning mechanism in the worktable, utilizes the coordinated cooperation of the slide, slide block, positioning block and limiting groove to enable the positioning block to automatically fit and align with the weld during the spiral pushing process of the straight seam steel pipe, and forces the positioning block to detach upward after the slide block limits it. This eliminates the tedious step of manually adjusting the weld position before cutting each steel pipe, realizes continuous and rapid automated cutting, greatly shortens the processing time of a single steel pipe, and significantly improves production efficiency.

[0016] 2. The laser cutting device for processing bearing steel pipes fixes the weld in a uniform, vertically upward position through a positioning mechanism before laser cutting, ensuring that the position height of the cut of each steel pipe relative to the weld is consistent. The cut steel pipes are then transported to subsequent processes at a fixed angle, which facilitates automatic alignment of subsequent processing stations such as chamfering and boring, and is conducive to realizing fully automated production.

[0017] 3. This laser slitting device for processing bearing steel pipes, through the coordinated operation of the feeding mechanism and the positioning mechanism, has the following functions: the first conveying device pushes the steel pipes one by one to the ramp, the second conveying device pushes the steel pipes into the feed inlet, the push rod continuously pushes the steel pipes towards the center of the worktable, and at the same time, the rotating component drives the steel pipes to rotate in a spiral. This allows the steel pipes to automatically align the weld seams simultaneously during the feeding and conveying process, integrating the three independent processes of feeding, positioning, and conveying into one, simplifying the overall structure of the device, and improving the production cycle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a cross-sectional view of the overall structure of the present invention.

[0020] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0021] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at point B in the middle.

[0022] Figure 5 This is a cross-sectional view of the rotating component in this invention.

[0023] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at point C.

[0024] Figure 7 This is an exploded view of the rotating component in this invention.

[0025] In the diagram: 1. Workbench; 2. Feed inlet; 3. Discharge outlet; 4. Laser cutting machine; 5. Straight seam steel pipe; 6. Slide groove; 7. Slide block; 8. Positioning block; 9. Weld seam; 10. First spring; 11. Limiting rod; 12. Second spring; 13. Limiting groove; 14. First horizontal groove; 15. Inclined groove; 16. Second horizontal groove; 17. Push rod; 18. Ramp; 19. First conveying device; 20. Second conveying device; 21. Mounting base; 22. Slider; 23. First motor; 24. Lead screw; 25. Lead nut; 26. First electric three-jaw chuck; 27. First jaw; 28. Second motor; 29. ​​First gear; 30. Connecting ring; 31. Second gear; 32. Arc groove; 33. Arc block; 34. Third spring; 35. Second electric three-jaw chuck; 36. Second jaw; 37. Third motor; 38. Third gear; 39. Fourth gear. Detailed Implementation

[0026] 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.

[0027] Example 1, please refer to Figures 1-7 A laser slitting device for processing bearing steel pipes includes a worktable 1, a feed port 2 on the right side of the worktable 1, a discharge port 3 on the left side of the worktable 1, and a laser cutting machine 4 fixedly installed in the middle of the worktable 1.

[0028] A feeding mechanism is provided on the right side of the workbench 1. The feeding mechanism is used to transport the straight seam steel pipe 5. A positioning mechanism is also provided inside the workbench 1. The positioning mechanism includes a slide 6 opened in the workbench 1. A slide seat 7 is slidably installed in the slide 6. A positioning block 8 is slidably installed on the slide seat 7. The shape of the positioning block 8 matches the weld 9 on the straight seam steel pipe 5. When the position of the weld 9 corresponds to that of the positioning block 8, the positioning block 8 can be embedded in the weld 9.

[0029] The straight seam steel pipe 5 is spirally pushed to the center of the workbench 1 by the feeding mechanism (see Embodiment 3 for details). The positioning mechanism makes the positioning block 8 fit into the weld 9 to complete the positioning of the straight seam steel pipe 5. Then, the positioning mechanism drives the straight seam steel pipe 5 to rotate in order to cooperate with the laser cutting machine 4 to cut the straight seam steel pipe 5.

[0030] The slide block 7 is elastically connected to the inner wall of the worktable 1 via the first spring 10. A limit rod 11 is fixedly installed on the positioning block 8. The limit rod 11 is slidably connected to the slide block 7. The limit rod 11 is elastically connected to the slide block 7 via the second spring 12.

[0031] A limiting groove 13 is provided in the workbench 1, and a limiting rod 11 is slidably connected in the limiting groove 13. The limiting groove 13 includes a first horizontal groove 14, an inclined groove 15 and a second horizontal groove 16 connected from right to left. The height of the first horizontal groove 14 is lower than that of the second horizontal groove 16.

[0032] In this embodiment, a straight weld seam 9 is formed on the surface of the straight seam steel pipe 5 along its length. During laser slitting, the weld seam 9 needs to be positioned by a positioning mechanism to keep it at a fixed angle before and after cutting, so as to facilitate subsequent processing and inspection.

[0033] Therefore, the workbench 1 serves as the mounting base for the entire device, and its interior has a through-hole running horizontally. The right opening of this hole is the feed inlet 2, and the left opening is the discharge outlet 3. The inner diameter of the hole matches the outer diameter of the straight seam steel pipe 5 to be processed, ensuring that the steel pipe can pass through smoothly. A vertically penetrating slot is provided in the middle of the workbench 1, and the laser cutting machine 4 is fixedly installed in this slot. The laser beam generated by the laser cutting machine 4 is focused by the internal optical path system to form a high-power-density laser beam. The irradiation direction of this laser beam is set perpendicular to the axis of the straight seam steel pipe 5 and points towards its vertical central axis, to achieve precise circumferential cutting of the steel pipe.

[0034] The positioning mechanism for fixing the position of weld 9 specifically includes a slide groove 6, a slide block 7, and a positioning block 8. The slide groove 6 is an elongated groove inside the worktable 1. The slide block 7 is slidably installed in the slide groove 6 and can reciprocate along the axial direction of the straight seam steel pipe 5. The positioning block 8 is vertically slidably installed on the slide block 7, and its top end is elastically connected to the slide block 7 by a second spring 12. The bottom end of the positioning block 8 is machined into a protruding structure that matches the shape of weld 9. At the same time, limit rods 11 are provided on the front and rear sides of the positioning block 8. One end of the limit rod 11 is fixed to the positioning block 8, and the other end passes through the through hole on the slide block 7 and extends into the limit groove 13 opened in the inner wall of the worktable 1.

[0035] The limiting groove 13 is the key path for controlling the lifting and lowering of the positioning block 8. Its overall outline, from right to left, is formed by connecting the first horizontal groove 14, the inclined groove 15, and the second horizontal groove 16. The position height of the first horizontal groove 14 is lower than that of the second horizontal groove 16. In the initial state, i.e., when no material is loaded, the slide 7 is located at the rightmost side of the slide 6. At this time, the limiting rod 11 is located inside the first horizontal groove 14. Due to the height limitation of the first horizontal groove 14, the positioning block 8 is forced down and retracts entirely under the inner wall of the worktable 1 to ensure that the straight seam steel pipe 5 can enter without obstruction.

[0036] During operation, when the straight seam steel pipe 5 is pushed from right to left past the position of the positioning block 8, the following two situations will occur: If the weld 9 on the straight seam steel pipe 5 is located directly above, the bottom end of the positioning block 8 will naturally embed into the weld 9. It should be noted that the second spring 12 is always in a compressed state, and the force it exerts on the positioning block 8 is downward, meaning it constantly pushes the positioning block 8 towards the outer wall of the straight seam steel pipe 5. The positioning block 8 drives the limiting rod 11 to move synchronously, therefore the limiting rod 11 always has a downward tendency under the elastic force of the second spring 12.

[0037] Within the first horizontal groove 14, the limiting rod 11 naturally abuts against the lower wall of the first horizontal groove 14 under the combined action of its own weight and the downward pushing force of the second spring 12. The first horizontal groove 14 has a rectangular cross-section, and its lower wall is a plane. The limiting rod 11 can be reliably held on the lower wall by the continuous downward elastic force of the second spring 12.

[0038] At this time, because the limiting rod 11 is in the lower first horizontal groove 14 and is restricted to the lower wall of the groove, the positioning block 8 cannot move upward, and the weld 9 and the positioning block 8 are stuck. Therefore, when the straight seam steel pipe 5 continues to be pushed to the left, it will drive the slide block 7 to overcome the tension of the first spring 10 and slide to the left through the positioning block 8.

[0039] During this process, the limiting rod 11 slides smoothly to the left along the lower wall of the first horizontal groove 14. When it passes through the area of ​​the inclined groove 15, the inclined surface of the inclined groove 15 guides the limiting rod 11 to move upward along the inclined surface, and finally enters the second horizontal groove 16 at a higher position.

[0040] When the slide block 7 reaches the leftmost side of the slide groove 6 and is limited to no further movement, if the straight seam steel pipe 5 continues to advance to the left, the inclined surface cooperation between it and the positioning block 8 will force the positioning block 8 to rise further. At this time, the limiting rod 11 slides upward in the second horizontal groove 16, and the second spring 12 is further compressed until the positioning block 8 is completely disengaged from the weld 9. The straight seam steel pipe 5 can then continue to advance, while the weld 9 has been corrected and remains in a fixed vertical upward posture.

[0041] If the initial position of the weld 9 on the straight seam steel pipe 5 is not upward, then during the process of the feeding mechanism driving the straight seam steel pipe 5 to move forward spirally (rotating and moving to the left), when the bottom end of the positioning block 8 contacts the outer wall of the steel pipe, it will slide along the pipe wall due to the guiding effect of its inclined surface. When the steel pipe rotates to a specific angle so that the weld 9 is directly opposite the positioning block 8, the positioning block 8 will immediately spring into the weld 9 under the pushing force of the second spring 12, completing automatic alignment and positioning. After that, its limiting and disengaging action principle is completely consistent with the first case mentioned above.

[0042] After the positioning block 8 disengages, the slide block 7, under the elastic restoring force of the first spring 10, will slide to the right along the slide groove 6 and return to its initial position. At the same time, driven by the slide block 7, the limiting rod 11 moves in the opposite direction along the path of the second horizontal groove 16, the inclined groove 15 and the first horizontal groove 14, so that the positioning block 8 is reset to the retracted state, preparing for the processing of the next steel pipe.

[0043] It should be further explained that for the first spring 10, which is under long-term compression or tensile stress, a guide telescopic rod can be installed between the slide 7 and the inner wall of the worktable 1. This guide telescopic rod passes through the inner ring of the first spring 10, which can prevent the spring from radially bending or shifting during compression, and can also provide auxiliary linear thrust when its elastic performance decreases, ensuring that the slide 7 can reliably return to its original position. For the second spring 12, it is installed in the countersunk hole between the positioning block 8 and the slide 7. The depth and diameter of the countersunk hole physically limit the amount of spring deformation. When the spring is compressed to a certain extent, the positioning block 8 will directly contact the slide 7, avoiding plastic deformation failure caused by overload or fatigue.

[0044] Example 2, please refer to Figures 1-7 The feeding mechanism includes a first conveying device 19 and a second conveying device 20 set on the workbench 1. The first conveying device 19 is used to push the straight seam steel pipes 5 one by one onto the slope 18, and the second conveying device 20 is used to push the straight seam steel pipes 5 rolling down the slope 18 from right to left into the feed inlet 2.

[0045] The workbench 1 is provided with a ramp 18. The straight seam steel pipe 5 slides down the ramp 18 to the second conveying device 20, and then the second conveying device 20 pushes the straight seam steel pipe 5 from right to left into the feed inlet 2.

[0046] The first conveying device 19 includes a mounting base 21 fixedly mounted on the workbench 1, a slider 22 slidably mounted on the mounting base 21, a push rod 17 fixedly mounted on the slider 22, a first motor 23 mounted on the mounting base 21, a lead screw 24 rotatably mounted on the mounting base 21, the output shaft of the first motor 23 being fixedly connected to the lead screw 24, and a nut 25 fixedly mounted on the slider 22, which is threadedly connected to the lead screw 24.

[0047] The structure of the second conveying device 20 is the same as that of the first conveying device 19.

[0048] In this embodiment: In order to realize the automated continuous feeding of straight seam steel pipe 5, the complete feeding mechanism set on the workbench 1 includes push rod 17, ramp 18, first conveying device 19 and second conveying device 20.

[0049] A hopper for storing straight seam steel pipes 5 to be processed is located on the upper right side of the workbench 1. The bottom outlet of the hopper is connected to the upper end of the ramp 18. The ramp 18 is an inclined slide, with its higher end connecting to the hopper and its lower end extending to the starting end of the second conveying device 20. On the upper side of the ramp 18, at the outlet of the hopper, a first conveying device 19 is located.

[0050] The specific structure of the first conveying device 19 is as follows: A mounting base 21 is fixedly installed on the workbench 1, and a lead screw 24 is rotatably mounted on the mounting base 21. The end of the lead screw 24 is connected to the output shaft of the first motor 23. A slider 22 is slidably mounted on the guide rail of the mounting base 21, and a nut 25 is fixed to the bottom of the slider 22. The nut 25 is threadedly engaged with the lead screw 24. When the first motor 23 starts, the lead screw 24 rotates, and through the transmission of the lead screw 24 nut pair, the slider 22 is driven to move precisely in a straight line along the guide rail. A push rod 17 is fixedly connected to the slider 22 and moves synchronously with the slider 22. The end of the push rod 17 faces the end face of the straight seam steel pipe 5 accumulated at the bottom of the hopper.

[0051] The working logic of the first conveying device 19 is as follows: Each time the first motor 23 completes a working cycle, the push rod 17 extends forward once, pushing a straight seam steel pipe 5 from the bottom of the hopper laterally out of the hopper outlet, causing it to roll onto the ramp 18. Then, the push rod 17 retracts, and the steel pipe in the hopper automatically falls back into place under gravity, awaiting the next push. Through this step-by-step pushing, a large number of arranged steel pipes are conveyed one by one and orderly onto the ramp 18.

[0052] The structure of the second conveying device 20 is exactly the same as that of the first conveying device 19. The second conveying device 20 is located at the lower end of the ramp 18. When a straight seam steel pipe 5 rolls down the ramp 18 to the position of the second conveying device 20, the slider 22 of the second conveying device 20 clamps or pushes the steel pipe, accurately pushing it from right to left into the feed port 2 of the workbench 1, thus completing the feeding into the workbench 1.

[0053] Through this division of labor and cooperation, the first conveying device 19 is responsible for separating the piled steel pipes one by one and sending them into the ramp 18, while the second conveying device 20 is responsible for accurately sending the steel pipes that have rolled into place into the processing station, thus realizing a continuous, stable and orderly feeding process for the straight seam steel pipe 5.

[0054] Example 3, please refer to Figures 1-4 The feeding mechanism also includes a first electric three-jaw chuck 26 and a first rotating component. The first electric three-jaw chuck 26 is used to clamp the straight seam steel pipe 5, and the first rotating component is used to drive the straight seam steel pipe 5 to rotate.

[0055] The first electric three-jaw chuck 26 is rotatably mounted on the worktable 1. Three first jaws 27 are slidably mounted on the first electric three-jaw chuck 26. The three first jaws 27 perform synchronous radial displacement based on the central axis of the first electric three-jaw chuck 26 to clamp or release the straight seam steel pipe 5.

[0056] The first rotating assembly includes a second motor 28 fixedly mounted on the worktable 1, a first gear 29 fixedly mounted on the output shaft of the second motor 28, a connecting ring 30 fixedly mounted on the first electric three-jaw chuck 26, a second gear 31 fixedly mounted on the connecting ring 30, and the second gear 31 meshing with the first gear 29.

[0057] The connecting ring 30 is rotatably connected to the first electric three-jaw chuck 26. The connecting ring 30 has an arc-shaped groove 32. An arc-shaped block 33 is fixedly installed on the second gear 31. The arc-shaped block 33 is slidably connected in the arc-shaped groove 32. The arc-shaped block 33 is elastically connected to the inner wall of the arc-shaped groove 32 through the third spring 34.

[0058] The elastic support of the third spring 34 causes the arc-shaped block 33 to be located on the counterclockwise side of the arc-shaped groove 32.

[0059] When positioning the weld 9 on the straight seam steel pipe 5, the straight seam steel pipe 5 is driven to rotate clockwise by the first rotating component.

[0060] When cutting the straight seam steel pipe 5, the straight seam steel pipe 5 is driven to rotate counterclockwise by the first rotating component.

[0061] A second electric three-jaw chuck 35 and a second rotating assembly are fixedly installed on the left side of the worktable 1. The second electric three-jaw chuck 35 is rotatably connected to the worktable 1, and three second jaws 36 are slidably installed on the second electric three-jaw chuck 35.

[0062] The second rotating assembly includes a third motor 37 fixedly mounted on the worktable 1, a third gear 38 fixedly mounted on the output shaft of the third motor 37, and a fourth gear 39 fixedly mounted on the second electric three-jaw chuck 35, the fourth gear 39 meshing with the third gear 38.

[0063] In this embodiment: In order to realize the spiral pushing of the straight seam steel pipe 5 during the positioning process and the precise rotation during the cutting process, the feeding mechanism also includes a precision rotating component for clamping and driving the steel pipe to rotate.

[0064] On one side of the feed inlet 2, a first electric three-jaw chuck 26 is provided. This first electric three-jaw chuck 26 is rotatably mounted on the housing of the worktable 1, with its central axis coinciding with the axis of the straight seam steel pipe 5. Three radially evenly distributed first jaws 27 are slidably mounted on the first electric three-jaw chuck 26. Under hydraulic drive, the three first jaws 27 simultaneously move radially towards the center or outwards, thereby clamping or releasing the right end of the straight seam steel pipe 5.

[0065] The rotation of the first electric three-jaw chuck 26 is driven by the first rotating assembly. Its power source is a second motor 28 fixed to the worktable 1, and a first gear 29 is mounted on the output shaft of the second motor 28. A connecting ring 30 is fixedly connected to the housing of the first electric three-jaw chuck 26, and a second gear 31 is fixedly mounted on the connecting ring 30, which meshes externally with the first gear 29. When the second motor 28 rotates, the first electric three-jaw chuck 26 and the straight seam steel pipe 5 it holds are rotated through the transmission of the gear pair.

[0066] During the positioning phase, if weld seam 9 needs to be located, the second motor 28 is controlled to rotate forward, driving the straight seam steel pipe 5 to rotate slowly clockwise. Simultaneously, the push rod 17 provides axial feed, achieving a spiral advance of the steel pipe. During this process, the positioning block 8 remains in contact with the pipe wall. Only when the positioning block 8 embeds into weld seam 9 and the chuck jams and cannot continue rotating, will the drive current of the second motor 28 increase instantaneously. Upon detecting this current change, the control system immediately cuts off the power to the second motor 28 and maintains the current torque, thus completing the precise positioning of weld seam 9. To prevent damage caused by motor stalling, a buffer structure is provided between the connecting ring 30 and the second gear 31: the connecting ring 30 has an arc-shaped groove 32, and the inner side of the second gear 31 has a corresponding arc-shaped block 33. This arc-shaped block 33 is slidably installed within the arc-shaped groove 32 and connected to the end wall of the arc-shaped groove 32 via a third spring 34. During normal drive rotation, the arc-shaped block 33 abuts against the end wall of the arc-shaped groove 32, transmitting torque. When the chuck is stuck but the motor is still rotating, the second gear 31 rotates relative to the connecting ring 30, and the arc block 33 slides in the arc groove 32 and compresses the third spring 34. This compression absorbs the excess rotation angle of the motor and plays an overload protection role.

[0067] During the cutting stage, the second motor 28 is controlled to rotate in the opposite direction, driving the straight seam steel pipe 5 to rotate counterclockwise at a uniform speed. Since the arc block 33 is pressed against the other end wall of the arc groove 32 and the third spring 34 is in a natural or stretched state, the rotational force of the gear can be directly transmitted to the connecting ring 30 and the chuck without buffering, ensuring the synchronicity and angular accuracy of the steel pipe rotation during cutting.

[0068] Meanwhile, on one side of the discharge port 3, a second electric three-jaw chuck 35 and a second rotating assembly are provided, which serve to assist in supporting and synchronously driving the left end of the steel pipe. The second electric three-jaw chuck 35 is also rotatably connected to the worktable 1, on which three second jaws 36 are slidably mounted. The power source for the second rotating assembly is a third motor 37, and a third gear 38 is fixedly mounted on the output shaft of the third motor 37. A fourth gear 39 is fixedly mounted on the outer circumference of the second electric three-jaw chuck 35, and the third gear 38 meshes with the fourth gear 39. During the cutting process, the third motor 37 and the second motor 28 operate synchronously to ensure that the left and right ends of the straight seam steel pipe 5 rotate at the same speed and direction, thereby avoiding deformation of the steel pipe or a decrease in cutting accuracy due to torsional stress. In the non-cutting state, the second jaws 36 of the second electric three-jaw chuck 35 are in the released state to avoid interfering with the linear feed of the steel pipe.

[0069] It should be noted that when the third spring 34 is fully compressed or fully released, the arc-shaped block 33 will contact the limit stop before the spring, thus ensuring that the spring always works within its safe elastic deformation range and will not undergo over-compression or tensile plastic deformation.

[0070] 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.

[0071] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A laser slitting device for processing bearing steel pipes, comprising a worktable (1), characterized in that: The workbench (1) has a feed inlet (2) on the right side and a discharge outlet (3) on the left side. A laser cutting machine (4) is fixedly installed in the middle of the workbench (1). The right side of the workbench (1) is provided with a feeding mechanism, which is used to transport straight seam steel pipe (5). The workbench (1) is also provided with a positioning mechanism, which includes a slide groove (6) opened in the workbench (1), a slide seat (7) is slidably installed in the slide groove (6), and a positioning block (8) is slidably installed on the slide seat (7). The positioning block (8) fits with the weld (9) on the straight seam steel pipe (5). The feeding mechanism spirally pushes the straight seam steel pipe (5) to the center of the workbench (1). The positioning mechanism causes the positioning block (8) to fit into the weld (9) to complete the positioning of the straight seam steel pipe (5). The positioning mechanism then drives the straight seam steel pipe (5) to rotate in order to cooperate with the laser cutting machine (4) to cut the straight seam steel pipe (5).

2. The laser slitting device for processing bearing steel pipes according to claim 1, characterized in that: The slide (7) is elastically connected to the inner wall of the worktable (1) via a first spring (10). A limit rod (11) is fixedly installed on the positioning block (8). The limit rod (11) is slidably connected to the slide (7). The limit rod (11) is elastically connected to the slide (7) via a second spring (12).

3. The laser slitting device for processing bearing steel pipes according to claim 2, characterized in that: The workbench (1) has a limiting groove (13) and the limiting rod (11) is slidably connected in the limiting groove (13). The limiting groove (13) includes a first horizontal groove (14), an inclined groove (15), and a second horizontal groove (16) connected sequentially from right to left. The height of the first horizontal groove (14) is lower than that of the second horizontal groove (16).

4. The laser slitting device for processing bearing steel pipes according to claim 1, characterized in that: The feeding mechanism includes a first conveying device (19) and a second conveying device (20) disposed on the workbench (1). The first conveying device (19) is used to push the straight seam steel pipes (5) one by one onto the ramp (18). The second conveying device (20) is used to push the straight seam steel pipes (5) rolling down the ramp (18) from right to left into the feed inlet (2). The workbench (1) is provided with a ramp (18). The straight seam steel pipe (5) slides down the ramp (18) to the second conveying device (20), and then the second conveying device (20) pushes the straight seam steel pipe (5) from right to left into the feed inlet (2).

5. The laser slitting device for processing bearing steel pipes according to claim 4, characterized in that: The first conveying device (19) includes a mounting base (21) fixedly installed on the workbench (1), a slider (22) slidably installed on the mounting base (21), a push rod (17) fixedly installed on the slider (22), a first motor (23) provided on the mounting base (21), a lead screw (24) rotatably installed on the mounting base (21), the output shaft of the first motor (23) is fixedly connected to the lead screw (24), a nut (25) is fixedly installed on the slider (22), and the nut (25) is threadedly connected to the lead screw (24); The structure of the second conveying device (20) is the same as that of the first conveying device (19).

6. The laser slitting device for processing bearing steel pipes according to claim 4, characterized in that: The feeding mechanism further includes a first electric three-jaw chuck (26) and a first rotating component. The first electric three-jaw chuck (26) is used to clamp the straight seam steel pipe (5), and the first rotating component is used to drive the straight seam steel pipe (5) to rotate.

7. The laser slitting device for processing bearing steel pipes according to claim 6, characterized in that: The first electric three-jaw chuck (26) is rotatably mounted on the worktable (1). Three first jaws (27) are slidably mounted on the first electric three-jaw chuck (26). The three first jaws (27) perform synchronous radial displacement based on the central axis of the first electric three-jaw chuck (26) to clamp or release the straight seam steel pipe (5).

8. The laser slitting device for processing bearing steel pipes according to claim 7, characterized in that: The first rotating assembly includes a second motor (28) fixedly mounted on the worktable (1), a first gear (29) fixedly mounted on the output shaft of the second motor (28), a connecting ring (30) fixedly mounted on the first electric three-jaw chuck (26), a second gear (31) fixedly mounted on the connecting ring (30), and the second gear (31) meshing with the first gear (29); The connecting ring (30) is rotatably connected to the first electric three-jaw chuck (26). An arc groove (32) is provided on the connecting ring (30). An arc block (33) is fixedly installed on the second gear (31). The arc block (33) is slidably connected in the arc groove (32). The arc block (33) is elastically connected to the inner wall of the arc groove (32) through a third spring (34).

9. A laser slitting device for processing bearing steel pipes according to claim 8, characterized in that: The elastic support of the third spring (34) causes the arc block (33) to be located on the counterclockwise side of the arc groove (32); When positioning the weld (9) on the straight seam steel pipe (5), the straight seam steel pipe (5) is driven to rotate clockwise by the first rotating component; When cutting the straight seam steel pipe (5), the straight seam steel pipe (5) is driven to rotate counterclockwise by the first rotating component.

10. The laser slitting device for processing bearing steel pipes according to claim 1, characterized in that: A second electric three-jaw chuck (35) and a second rotating assembly are fixedly installed on the left side of the workbench (1). The second electric three-jaw chuck (35) is rotatably connected to the workbench (1), and three second jaws (36) are slidably installed on the second electric three-jaw chuck (35). The second rotating assembly includes a third motor (37) fixedly mounted on the worktable (1), a third gear (38) fixedly mounted on the output shaft of the third motor (37), and a fourth gear (39) fixedly mounted on the second electric three-jaw chuck (35), the fourth gear (39) meshing with the third gear (38).

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