A laser drilling fixture for steel power transmission circular tube towers and its application method

Abstract

This invention relates to the field of laser cutting technology, specifically to a laser drilling fixture for steel power transmission towers and its application method. The fixture is used to clamp both sides of the drilling area of ​​a laser cutting device. It includes: a base with side plates; multiple sets of support seats disposed on the side plates, connected by an adjustment structure that can change the distance between adjacent sets of support seats; pressure plates disposed on the support seats, with two pressure plates on each set of support seats; a pulling assembly connecting the support seats and the pressure plates, capable of driving the two sets of pressure plates to move closer or further apart; and a scraping structure connected to the pressure plates, which removes slag formed on the workpiece as the pressure plates move towards it, preventing bending or deformation of the workpiece.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, specifically to a laser drilling fixture for steel power transmission cylindrical tube towers and its application method. Background Technology

[0002] Currently, during the manufacturing process of steel power pipe poles, the crossarms need to be processed with laser cutting or laser drilling to create wire hanging points for connecting the hanging plates. To ensure processing stability, existing tooling typically uses clamping and fixing at both ends and the middle of the crossarm to limit the overall displacement of the workpiece during the drilling process.

[0003] However, the conductor hanging points of the crossarm require multiple sets of densely arranged bolt holes to meet the high-strength connection requirements of the hanging plate. Due to the concentrated energy of laser processing, when multiple closely spaced holes are continuously processed on the slender crossarm structure, heat will accumulate in local areas. At this time, the heated area on the lower side of the crossarm will expand thermally, while the upper side of the crossarm will remain at its original temperature. This will cause asymmetrical expansion strain on the upper and lower sides of the crossarm, which will then form a bending moment and cause local bending deformation at the tail end of the crossarm. This deformation will not only affect the installation accuracy of the subsequent hanging plate, but also reduce the overall stress performance of the crossarm. Summary of the Invention

[0004] The purpose of this invention is to provide a laser drilling fixture for steel power transmission cylindrical tube towers and its application method, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A laser drilling fixture for steel power transmission cylindrical poles, used to clamp both sides of the drilling area of ​​a laser cutting device, includes:

[0007] A base, on which side plates are provided;

[0008] Multiple sets of support seats are provided on the side plate. The multiple sets of support seats are connected by an adjustment structure, which can change the distance between two adjacent sets of support seats.

[0009] Pressure plates are provided on the support bases, and two sets of pressure plates are provided on each set of support bases;

[0010] A traction assembly connects the support base and the pressure plate, and the traction assembly can drive the two sets of pressure plates to move closer to or further apart from each other.

[0011] The scraping structure is connected to the pressure plate, and when the pressure plate moves toward the workpiece, the scraping structure can remove the slag formed on the workpiece.

[0012] The laser drilling fixture for steel power pipe towers as described above: the adjustment structure includes multiple sets of guide grooves provided on the side plate and a first roller rotatably connected to the support base, the first roller being able to roll within the guide grooves;

[0013] The adjustment structure also includes a traction kit connecting multiple sets of the support seats and a first cylindrical spring disposed between two adjacent sets of the support seats.

[0014] The laser drilling fixture for the steel power tube tower as described above: the tensioning kit includes a tie rod that passes through the support base and is slidably connected to the support base, and a second electric telescopic rod disposed on the side plate, wherein the actuating end of the second electric telescopic rod is connected to the tie rod;

[0015] The first cylindrical spring is sleeved on the pull rod;

[0016] The end of the pull rod away from the second electric telescopic rod is connected to a connecting plate. The connecting plate abuts against the support seat located on the side, and a second roller is rotatably mounted on the connecting plate. The second roller can roll in the guide groove.

[0017] The laser drilling fixture for the steel power pipe tower as described above: the tensioning assembly includes:

[0018] A drive structure is mounted on the support base, and the pressure plate is slidably connected to the drive structure.

[0019] A guide groove is provided on the inner wall of the support base, and a convex shaft provided at the end of the pressure plate can slide within the guide groove.

[0020] The laser drilling fixture for steel power tube towers as described above: the driving structure includes a first electric telescopic rod disposed on the support base and a sliding member sliding on the support base. The actuating end of the first electric telescopic rod is connected to the sliding member, and the sliding member can move along the length direction of the support base.

[0021] The pressure plate is capable of moving relative to the width direction of the support in the sliding member.

[0022] The laser drilling fixture for steel power pipe towers as described above: the guide groove includes an inclined groove and a vertical groove disposed on the side of the support base, and the inclined groove and the vertical groove are connected;

[0023] When the cam moves along the vertical groove, the pressure plate can move toward or away from the workpiece.

[0024] The laser drilling fixture for steel power pipe towers as described above: the scraping structure includes an energy storage kit connected to the pressure plate and a scraper connected to the energy storage kit. When the pressure plate is away from the workpiece, the distance between the lower surface of the scraper and the workpiece is less than the distance between the lower surface of the pressure plate and the workpiece.

[0025] The laser drilling fixture for steel power tube towers as described above: the energy storage kit includes a hysteresis sleeve connected to the pressure plate and a telescopic shaft sliding inside the hysteresis sleeve. The telescopic shaft is connected to the shovel, and a limit ring is provided on the telescopic shaft.

[0026] A second cylindrical spring is also fitted on the telescopic shaft. One end of the second cylindrical spring is connected to the limiting ring, and the other end is connected to the inner wall of the hysteresis sleeve.

[0027] A method for using a laser drilling fixture for steel power pipe towers as described above includes the following steps:

[0028] Step 1: Control the movement of the traction component so that the corresponding two sets of pressure plates can move away from each other;

[0029] Step 2: Place the workpiece to be drilled between the two sets of pressure plates, and then control the pulling assembly to press the pressure plates onto the workpiece.

[0030] Step 3: Control the laser cutting device to drill holes at the corresponding positions on the workpiece;

[0031] Step 4: Before drilling, the traction assembly drives the two sets of pressure plates at the corresponding positions away from the workpiece so that the area is exposed to the working range of the laser cutting device, while the remaining pressure plates continue to hold the workpiece.

[0032] Step 5: Repeat steps 3 and 4 above until the drilling operation is complete.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] With the adjustment structure in place, when the workpiece is being cut and drilled, the pressure plates on both sides of the cutting and drilling area are clamping the workpiece. This allows the heat generated by the cutting holes in the wire hanging point area to accumulate and cause thermal expansion of the workpiece. The support seats on both sides of this area will transfer the thermal expansion force to the first columnar spring. Under the action of the first columnar spring, a certain active thermal deformation compensation and constraint effect is generated. This actively compensates for thermal expansion, suppresses warping deformation, improves the hole position accuracy and hole wall quality in the wire hanging point area, reduces the residual stress inside the workpiece, reduces the cumulative deformation of the workpiece caused by uneven thermal expansion and contraction during laser drilling, and improves the overall hole position accuracy of the bolt hole group.

[0035] With the help of the pull-up components, the active thermal deformation compensation and constraint effect is no longer isolated to a single hole, but moves and overlaps continuously along the length of the workpiece as the cutting process progresses. This avoids the accumulation of deformation and stress concentration caused by processing multiple points in sequence. At the same time, since the processed area is re-clamped after the laser is removed, the overall rigidity of the workpiece is maintained, which suppresses the positioning deviation of subsequent positions induced by residual thermal shrinkage around the completed holes.

[0036] The scraping structure removes slag near the workpiece after drilling and before the pressure plate re-clamps it, ensuring that the pressure plate does not press directly on the slag when it comes into contact with the workpiece, thus reducing the surface contact area between the pressure plate and the workpiece. This ensures that the pressure plate can still press against the workpiece after drilling, thereby increasing the friction between them. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the laser drilling fixture for steel power pipe towers.

[0038] Figure 2 This is a schematic diagram of the structure after the base is removed in the laser drilling tool for a steel power pipe tower.

[0039] Figure 3 This is a schematic diagram of the structure of a steel power pipe tower after the base has been removed, using a laser drilling tool.

[0040] Figure 4 This is a top view of a steel power pipe tower after the base has been removed, achieved using a laser drilling tool.

[0041] Figure 5 This is a schematic diagram of the support base, pressure plate, tensioning assembly, and scraping structure in the laser drilling tooling for steel power pipe towers.

[0042] Figure 6 This is an exploded view of the support base, pressure plate, and tensioning assembly in the laser drilling tooling for steel power pipe towers.

[0043] Figure 7 This is a schematic diagram of the scraping structure in the laser drilling tool for steel power pipe towers.

[0044] Figure 8 This is a schematic diagram showing the relative states of the scraping structure and the tensioning components under different conditions in the laser drilling fixture for steel power pipe towers.

[0045] Figure 9 This is a schematic diagram of the drive component in the laser drilling fixture for steel power pipe towers.

[0046] In the diagram: 1. Base; 2. Side plate; 201. Guide groove; 3. Support seat; 301. Inclined groove; 302. Vertical groove; 4. First roller; 5. First electric telescopic rod; 6. Sliding component; 7. Pressure plate; 701. Convex shaft; 8. Second electric telescopic rod; 9. Pull rod; 10. First cylindrical spring; 11. Connecting plate; 12. Second roller; 13. Hysteresis sleeve; 14. Telescopic shaft; 1401. Limiting ring; 15. Second cylindrical spring; 16. Shovel; 17. First linear drive module; 18. Second linear drive module; 19. Laser cutting device; 20. Linear actuator. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0048] Please see Figures 1-9 As an embodiment of the present invention, the laser drilling fixture for the steel power pipe tower is used to clamp both sides of the drilling area of ​​the laser cutting device 19, and includes: a base 1, a support 3, a pressure plate 7, a pulling assembly and a scraping structure.

[0049] A side plate 2 is provided on the base 1. The laser cutting device 19 is connected to the base 1 through a drive assembly. The drive assembly includes a first linear drive module 17 and a second linear drive module 18 disposed on the base 1. The first linear drive module 17 and the second linear drive module 18 are arranged perpendicularly, and the actuating end of the first linear drive module 17 is connected to the second linear drive module 18. A linear driver 20 is provided on the actuating end of the second linear drive module 18, and the linear driver 20 is connected to the laser cutting device 19.

[0050] In this embodiment, the first linear drive module 17 and the second linear drive module 18 synchronously adjust the horizontal spatial position of the laser cutting device 19, so that during the cutting operation, the laser cutting device 19 can generate a circular motion path, thereby generating a circular laser cutting path on the workpiece to complete the drilling operation.

[0051] The linear actuator 20 is mainly used to adjust the vertical height of the laser cutting device 19. When drilling holes in the wire hanging points of the crossarm, the linear actuator 20 can adjust the height of the laser cutting device 19 to ensure the cutting effect. At the same time, when the laser cutting device 19 moves, the linear actuator 20 can drive the height of the laser cutting device 19 to rise, thereby avoiding positional interference with the corresponding pressure plate 7.

[0052] Please see Figure 2 , Figure 4Multiple sets of support seats 3 are provided and disposed on the side plate 2. The multiple sets of support seats 3 are connected by an adjustment structure, which can change the distance between two adjacent sets of support seats 3.

[0053] The adjustment structure includes multiple sets of guide grooves 201 disposed on the side plate 2 and a first roller 4 rotatably connected to the support base 3. The first roller 4 can roll within the guide grooves 201. Specifically, each support base 3 is provided with at least two sets of first rollers 4. These first rollers 4, in cooperation with the guide grooves 201, can guide and support the support base 3, ensuring the accuracy of its direction during movement and its levelness in a static state. This prevents the support base 3 from tilting due to gravity when the workpiece is loaded on it, and prevents the laser cutting device 19 from being in a non-perpendicular state with the workpiece during the subsequent laser cutting process.

[0054] The adjustment structure also includes a traction assembly connecting multiple sets of support seats 3 and a first cylindrical spring 10 disposed between two adjacent sets of support seats 3. Specifically, the stiffness of the first cylindrical springs 10 on both sides of the same set of support seats 3 is exactly the same, that is, the stiffness of the first cylindrical springs 10 used is the same, so that the first cylindrical springs 10 provide the same supporting force to the support seats 3, thereby enabling each set of support seats 3 to be equidistantly distributed in the initial state, thereby achieving equidistant clamping of the workpiece and improving clamping stability.

[0055] The traction kit includes a pull rod 9 that passes through the support base 3 and is slidably connected to the support base 3, and a second electric telescopic rod 8 disposed on the side plate 2, wherein the actuating end of the second electric telescopic rod 8 is connected to the pull rod 9.

[0056] The first cylindrical spring 10 is sleeved on the pull rod 9;

[0057] The end of the pull rod 9 away from the second electric telescopic rod 8 is connected to a connecting plate 11. The connecting plate 11 abuts against the support seat 3 located on the side, and a second roller 12 is rotatably arranged on the connecting plate 11. The second roller 12 can roll in the guide groove 201.

[0058] It should be noted that in this embodiment, multiple sets of support seats 3 form a straight line, with the support seat 3 at one end of the line fixedly connected to the side plate 2, and the support seat 3 at the other end abutting against the connecting plate 11. Initially, each set of first cylindrical springs 10 is in a compressed state, and each set of support seats 3 is equidistantly distributed. When the spacing between the wire hanging points of the crossarm changes, the connecting plate 11 can be pulled by controlling the second electric telescopic rod 8. At this time, the position of the support seat 3 at the end will change. Since the stiffness of each set of first cylindrical springs 10 is consistent, the amount of compression or release of multiple sets of first cylindrical springs 10 can be the same. This ensures that the support seats 3 remain equidistant before and after the connecting plate 11 moves, thus guaranteeing stable clamping of the workpiece.

[0059] Furthermore, when the pressure plate 7 on the support 3 completes the clamping of the workpiece, and the laser cutting device 19 performs the cutting action to form a set of wire hanging points, the pressure plate 7 in the corresponding area will separate from the workpiece and be misaligned under the action of the traction component, so as to free up the working space for the laser cutting device 19. At this time, the pressure plate 7 on the support 3 on both sides of the cutting position is still in the state of clamping the workpiece. When the heat generated by the cutting hole in the wire hanging point area accumulates and causes the workpiece to expand thermally, the support 3 on both sides of the area will transfer the thermal expansion force to the first columnar spring 10, so that a certain active thermal deformation compensation and constraint effect is generated under the action of the first columnar spring 10. Actively compensate for thermal expansion, suppress warping deformation, improve the hole position accuracy and hole wall quality in the wire hanging point area, reduce the residual stress inside the workpiece, reduce the cumulative deformation of the workpiece caused by uneven thermal expansion and contraction during laser drilling, and improve the overall hole position accuracy of the bolt hole group.

[0060] Please see Figures 5-6 , Figure 8 The pressure plate 7 is disposed on the support base 3, and two sets of pressure plates 7 are disposed on each set of support base 3;

[0061] The traction assembly connects the support base 3 and the pressure plate 7. The traction assembly can drive the two sets of pressure plates 7 to move closer to or further apart. The traction assembly includes:

[0062] The driving structure is provided on the support base 3. The pressure plate 7 is slidably connected to the driving structure. The driving structure includes a first electric telescopic rod 5 provided on the support base 3 and a sliding member 6 sliding on the support base 3. The actuating end of the first electric telescopic rod 5 is connected to the sliding member 6. The sliding member 6 can move along the length direction of the support base 3.

[0063] The pressure plate 7 is capable of moving in the sliding member 6 relative to the width direction of the support base 3.

[0064] When the first electric telescopic rod 5 drives the sliding member 6 to move, it can drive the pressure plate 7 connected to the sliding member 6 to move, so that the pressure plate 7 can move toward or away from the workpiece, thereby realizing the clamping and release of the workpiece.

[0065] It should be noted that when the laser cutting device 19 is operating in one area of ​​the workpiece, the pressure plate 7 in that area is in a state of separation from the workpiece. When the operation in that area is completed and the laser cutting device 19 moves towards the next area, the pressure plate 7 in the original area will move towards the workpiece again, thereby achieving the re-clamping of the workpiece. Meanwhile, the pressure plate 7 in the area to be cut will move away from the workpiece, thus freeing up space for the operation of the laser cutting device 19. This ensures that when laser cutting is performed in one area, the pressure plates 7 on both sides of that area can maintain clamping of the workpiece, so that the active thermal deformation compensation and constraint effect can be generated within a certain area, thereby improving the compensation and constraint effect.

[0066] Based on the above settings, the active thermal deformation compensation and constraint effect no longer acts in isolation on a single hole, but moves continuously along the length of the workpiece and overlaps as the cutting process progresses. This avoids the accumulation of deformation and stress concentration caused by processing multiple points in sequence. At the same time, since the processed area is re-clamped after the laser is removed, the overall rigidity of the workpiece is maintained, suppressing the positioning deviation of subsequent positions induced by residual thermal shrinkage around the completed holes.

[0067] The guide groove is provided on the inner wall of the support base 3, and the convex shaft 701 provided at the end of the pressure plate 7 can slide in the guide groove. The guide groove includes an inclined groove 301 and a vertical groove 302 provided on the side of the support base 3, and the inclined groove 301 and the vertical groove 302 are connected.

[0068] When the convex shaft 701 moves along the vertical groove 302, the pressure plate 7 can move toward or away from the workpiece.

[0069] In this embodiment, initially, the pressure plate 7 is separated from and misaligned from the workpiece. At this time, the area above the workpiece's drilling zone is completely exposed within the working surface of the laser cutting device 19, and the convex shaft 701 is located at the end of the inclined groove 301 away from the vertical groove 302. When the pressure plate 7 needs to clamp the workpiece, the first electric telescopic rod 5 is activated, driving the sliding member 6 to move towards the workpiece. At this time, the pressure plate 7 will also move towards the workpiece. During this process, the convex shaft 701 will move sequentially along the inclined groove 301 and the vertical groove 302. When the convex shaft 701 moves within the inclined groove 301, the pressure plate 7 will also move laterally with the workpiece during its movement towards the workpiece, thereby enabling the pressure plate 7 to generate a certain area of ​​projection on the workpiece, ensuring the contact area between the pressure plate 7 and the workpiece in the future.

[0070] When the cam 701 moves along the vertical groove 302, the pressure plate 7 only changes the distance relative to the workpiece. This distance change allows the two sets of pressure plates 7 to adapt to workpieces of different thicknesses, ensuring a stable clamping effect for workpieces of different thicknesses.

[0071] Please see Figure 5 , Figures 7-8 The scraping structure is connected to the pressure plate 7. When the pressure plate 7 moves toward the workpiece, the scraping structure can remove the slag formed on the workpiece. The scraping structure includes an energy storage kit connected to the pressure plate 7 and a scraper 16 connected to the energy storage kit. When the pressure plate 7 moves away from the workpiece, the distance between the lower surface of the scraper 16 and the workpiece is less than the distance between the lower surface of the pressure plate 7 and the workpiece.

[0072] The energy storage kit includes a hysteresis sleeve 13 connected to the pressure plate 7 and a telescopic shaft 14 sliding within the hysteresis sleeve 13. The telescopic shaft 14 is connected to the blade 16, and a limit ring 1401 is provided on the telescopic shaft 14.

[0073] A second cylindrical spring 15 is also sleeved on the telescopic shaft 14. One end of the second cylindrical spring 15 is connected to the limiting ring 1401, and the other end is connected to the inner wall of the hysteresis sleeve 13.

[0074] When the laser cutting device 19 processes a certain area on the workpiece, the pressure plate 7 is in a state of separation and misalignment from the workpiece. At this time, when the cam shaft 701 moves along the inclined groove 301, the pressure plate 7 will move towards the workpiece and generate lateral movement. Since the distance between the lower surface of the scraper 16 and the workpiece is less than the distance between the lower surface of the pressure plate 7 and the workpiece, the scraper 16 will first abut against the workpiece. After that, when the pressure plate 7 continues to move, the scraper 16 will move along the surface of the workpiece. At the same time, the second columnar spring 15 is compressed, so that the scraper 16 has a certain abutting force with the surface of the workpiece, thereby assisting in removing the slag near the opening area. This ensures that when the pressure plate 7 abuts against the workpiece, it will not directly press on the slag, resulting in a reduction in the surface contact area between the pressure plate 7 and the workpiece. This ensures that after the drilling is completed, the pressure plate 7 can still press against the workpiece, thereby increasing the friction between the two.

[0075] As an embodiment of the present invention, a method for using the laser drilling fixture for steel power pipe towers as described above is also proposed, including the following steps:

[0076] Step 1: Control the movement of the traction component so that the corresponding two sets of pressure plates 7 can move away from each other;

[0077] Step 2: Place the workpiece to be drilled between the two sets of pressure plates 7, and then control the pulling assembly to press the pressure plates 7 onto the workpiece.

[0078] Step 3: Control the laser cutting device 19 to drill holes at the corresponding positions on the workpiece;

[0079] Step 4: Before drilling, the pulling assembly drives the two sets of pressure plates 7 at the corresponding positions away from the workpiece so that the area is exposed to the working range of the laser cutting device 19, while the remaining pressure plates 7 continue to hold the workpiece.

[0080] Step 5: Repeat steps 3 and 4 above until the drilling operation is complete.

[0081] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0082] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A laser drilling fixture for steel power pipe towers, used to clamp both sides of the drilling area of ​​a laser cutting device, characterized in that, include: A base, on which side plates are provided; Multiple sets of support seats are provided on the side plate. The multiple sets of support seats are connected by an adjustment structure, which can change the distance between two adjacent sets of support seats. Pressure plates are provided on the support bases, and two sets of pressure plates are provided on each set of support bases; A traction assembly connects the support base and the pressure plate, and the traction assembly can drive the two sets of pressure plates to move closer to or further apart from each other. The scraping structure is connected to the pressure plate, and as the pressure plate moves toward the workpiece, the scraping structure can remove the slag formed on the workpiece.

2. The laser drilling fixture for steel power transmission circular tube towers according to claim 1, characterized in that, The adjustment structure includes multiple sets of guide grooves disposed on the side plate and a first roller rotatably connected to the support base, the first roller being able to roll within the guide grooves; The adjustment structure also includes a traction kit connecting multiple sets of the support seats and a first cylindrical spring disposed between two adjacent sets of the support seats.

3. The laser drilling fixture for a steel power transmission circular tube tower according to claim 2, characterized in that, The traction kit includes a pull rod that passes through the support base and is slidably connected to the support base, and a second electric telescopic rod disposed on the side plate, wherein the actuating end of the second electric telescopic rod is connected to the pull rod. The first cylindrical spring is sleeved on the pull rod; The end of the pull rod away from the second electric telescopic rod is connected to a connecting plate. The connecting plate abuts against the support seat located on the side, and a second roller is rotatably mounted on the connecting plate. The second roller can roll in the guide groove.

4. The laser drilling fixture for a steel power transmission circular tube tower according to claim 1, characterized in that, The traction component includes: A drive structure is mounted on the support base, and the pressure plate is slidably connected to the drive structure. A guide groove is provided on the inner wall of the support base, and a convex shaft provided at the end of the pressure plate can slide within the guide groove.

5. The laser drilling fixture for a steel power transmission circular tube tower according to claim 4, characterized in that, The drive structure includes a first electric telescopic rod disposed on the support base and a sliding member sliding on the support base. The actuating end of the first electric telescopic rod is connected to the sliding member, and the sliding member can move along the length direction of the support base. The pressure plate is capable of moving relative to the width direction of the support in the sliding member.

6. The laser drilling fixture for a steel power transmission circular tube tower according to claim 4, characterized in that, The guide groove includes an inclined groove and a vertical groove disposed on the side of the support base, and the inclined groove and the vertical groove are connected. When the cam moves along the vertical groove, the pressure plate can move toward or away from the workpiece.

7. The laser drilling fixture for a steel power transmission circular tube tower according to claim 1, characterized in that, The scraping structure includes an energy storage kit connected to the pressure plate and a scraper connected to the energy storage kit. When the pressure plate is away from the workpiece, the distance between the lower surface of the scraper and the workpiece is less than the distance between the lower surface of the pressure plate and the workpiece.

8. The laser drilling fixture for a steel power transmission circular tube tower according to claim 7, characterized in that, The energy storage kit includes a hysteresis sleeve connected to the pressure plate and a telescopic shaft sliding within the hysteresis sleeve. The telescopic shaft is connected to the blade and is provided with a limit ring. A second cylindrical spring is also fitted on the telescopic shaft. One end of the second cylindrical spring is connected to the limiting ring, and the other end is connected to the inner wall of the hysteresis sleeve.

9. A method for using the laser drilling fixture for steel power pipe towers as described in claim 1, characterized in that, Includes the following steps: Step 1: Control the movement of the traction component so that the corresponding two sets of pressure plates can move away from each other; Step 2: Place the workpiece to be drilled between the two sets of pressure plates, and then control the pulling assembly to press the pressure plates onto the workpiece. Step 3: Control the laser cutting device to drill holes at the corresponding positions on the workpiece; Step 4: Before drilling, the traction assembly drives the two sets of pressure plates at the corresponding positions away from the workpiece so that the area is exposed to the working range of the laser cutting device, while the remaining pressure plates continue to hold the workpiece. Step 5: Repeat steps 3 and 4 above until the drilling operation is complete.

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