A welding steel pipe weld bead removing device and method

Abstract

The application discloses a welded steel pipe weld reinforcement removing device and method, and relates to the technical field of laser cutting. The device comprises a mounting head arranged on a laser cutting robot, a laser cutting head fixedly connected to the mounting head, and a nozzle included in the laser cutting head. The device further comprises a cleaning mechanism arranged on the side wall of the nozzle and used for cleaning the metal slag and dust on the inner wall of the nozzle aperture. The cleaning mechanism comprises a mounting groove arranged on the side wall of the nozzle, and a sliding block slidingly connected to the mounting groove. The device and method can scrape and clean the metal slag and dust on the inner wall of the nozzle aperture after laser cutting, avoid the blockage of the laser emission channel, the divergence of the laser beam, and even the direct interruption of the cutting, avoid the damage of the nozzle caused by local high temperature, and ensure the efficiency and quality of the laser cutting.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, specifically to a device and method for removing weld beads from welded steel pipes. Background Technology

[0002] Hydrogen fuel cell vehicles are a type of new energy vehicle powered by fuel cells. They utilize spiral welded steel pipes, primarily for high-pressure hydrogen pipeline systems. Spiral laser welded steel pipes are manufactured by combining spiral forming technology with laser welding technology. During welding, the steel strip is first bent into a spiral tube, and then welded using a spiral laser welding machine. After welding, spiral weld beads remain on the surface. To ensure the flatness of the steel pipe surface, reduce fluid resistance, or meet subsequent processing requirements, these weld beads typically need to be removed. This removal is usually done using laser cutting equipment. The laser cutting equipment mainly includes a laser cutting head, which comprises an optical system, a sensing and adjustment system, and a nozzle.

[0003] However, when using existing equipment and methods for removing weld beads from welded steel pipes, the molten metal slag and dust generated by laser cutting easily adhere to the inner wall of the nozzle orifice, which can block the laser emission channel, cause the laser beam to diverge, or even directly interrupt the cutting process. Furthermore, the nozzle may be damaged due to localized high temperatures, thus affecting the efficiency and quality of laser cutting.

[0004] Therefore, we propose a device and method for removing weld beads from welded steel pipes. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for removing weld beads from welded steel pipes, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding steel pipe weld bead removal device, comprising an mounting head mounted on a laser cutting robot, wherein a laser cutting head is fixedly connected to the mounting head, and the laser cutting head includes a nozzle; the welding steel pipe weld bead removal device further comprises: A cleaning mechanism, located on the side wall of the nozzle, is used to clean the molten metal slag and dust from the inner wall of the nozzle orifice. The cleaning mechanism includes a mounting groove on the side wall of the nozzle, and a sliding block is slidably connected in the mounting groove. The top of the sliding block is provided with a first through hole and a second through hole, and a scraper is connected in the second through hole through a lifting mechanism, so that the scraper can slide on the inner wall of the nozzle orifice and scrape off and clean the molten metal slag and dust.

[0007] Preferably, the lifting mechanism includes a fixed plate fixedly connected to the top of the second through hole, and two first sleeves fixedly connected to the bottom of the fixed plate. Each first sleeve is fitted with a first rod. The lower end of the first rod is fixed to the top of the scraper, and the upper end of the first rod is fixed to the top of the fixed plate by a first spring. A push rod is fixedly connected to the top of the scraper, and a push plate is inserted into the side wall of the nozzle. The push plate is connected to the side wall of the nozzle by a moving mechanism, and the side wall of the push plate is provided with an inclined surface so that the upper end of the push rod can slide along the inclined surface.

[0008] By adopting the above technical solution, the moving mechanism drives the push plate to move into the sliding block, so that the inclined surface abuts against the upper end of the push rod, causing the upper end of the push rod to slide downward along the inclined surface. At the same time, the first sleeve slides downward along the first sleeve, the first spring is stretched, and drives the scraper to move downward, causing the scraper to move downward along the inner wall of the nozzle orifice, which can scrape and clean the metal slag and dust on the inner wall of the nozzle orifice.

[0009] Preferably, the moving mechanism includes a connecting plate fixedly connected to the side wall of the push plate, and a top rod fixedly connected to the side wall of the connecting plate. Two second sleeves are fixedly connected to the side wall of the connecting plate, and a second sleeve rod is inserted into the second sleeve. The other end of the second sleeve rod is fixed to the side wall of the nozzle, and the second sleeve rod is fixed to the side wall of the connecting plate by a second spring. The sliding block is connected to the side wall of the connecting plate by a telescopic assembly.

[0010] By adopting the above technical solution, after the laser cutting is completed, the laser cutting robot and the mounting head drive the laser cutting head to move, so that the end of the top rod is separated from the steel pipe. At this time, the connecting plate can move towards the nozzle under the action of the second spring. At the same time, the sliding block is driven to slide into the mounting groove through the telescopic component, and the push plate moves synchronously. When the sliding block abuts against the side wall of the mounting groove, the sliding block stops moving. At this time, the second through hole is aligned with the inner hole of the nozzle.

[0011] Preferably, the telescopic assembly includes two third sleeve rods fixedly connected to the side wall of the connecting plate, and a third sleeve is sleeved on the side wall of the third sleeve rod. The other end of the third sleeve is fixed to the side wall of the sliding block, and the third sleeve rod is fixed to the side wall of the sliding block by a third spring.

[0012] By adopting the above technical solution, after the second through hole is aligned with the inner hole of the nozzle, when the connecting plate continues to move, the third sleeve rod can slide into the third sleeve tube, the third spring is compressed, and the push plate moves into the sliding block.

[0013] Preferably, the sidewall of the sliding block is provided with a cooling mechanism, which is used to cool the laser cutting head. The cooling mechanism includes multiple heat dissipation fins fixedly inserted into the sidewall of the sliding block. The sliding block is hollow and has a cavity inside. The cavity is filled with coolant, and the heat dissipation fins extend into the cavity.

[0014] By adopting the above technical solution, the laser cutting head can be cooled down during laser cutting through the action of coolant and heat dissipation fins, ensuring its performance and lifespan.

[0015] Preferably, the side wall of the mounting head is provided with a first control mechanism and a second control mechanism. The first control mechanism is used to control the height of the weld bead before laser cutting, and the second control mechanism is used to control the width of the weld bead before laser cutting. The first control mechanism includes a fixing plate fixedly connected to the side wall of the mounting head. A motor is fixedly connected to the side wall of the fixing plate, and a rotating rod is fixedly connected to the output end of the motor. A grinding disc is fixedly connected to the end of the rotating rod, and the grinding disc can pre-grind the top of the weld bead.

[0016] By adopting the above technical solution, when the mounting head moves the laser cutting head during cutting, it can move the grinding disc, causing the grinding disc to move to the top of the weld bead. As the spirally welded steel pipe is spirally conveyed, the motor is started, and the rotation of the motor drives the rotating rod and the grinding disc to rotate. When the height of the weld bead is higher than the normal height, the top protruding part can be ground, thereby controlling the height of the weld bead.

[0017] Preferably, the second control mechanism includes two moving blocks, and each moving block is fixedly connected to a grinding block on its side wall. The bottom of the grinding block is provided with an arc-shaped surface, and the grinding block can pre-grind both sides of the weld bead. The moving blocks are connected to the side wall of the mounting head through a moving component.

[0018] By adopting the above technical solution, during cutting, when the mounting head moves the laser cutting head, it can move the grinding disc, and through the moving component, it can move the moving block and the grinding block. The two grinding blocks move to both sides of the weld bead. When the width of the weld bead is greater than the normal width, the protruding part can abut against the arc surface, thereby pushing the two grinding blocks and the moving block away from each other. Through the moving component, the moving block and the grinding block move back and forth, so that the grinding block can grind the protruding parts on both sides of the weld bead. The width of the weld bead can be controlled, which makes it easier to control the height and width of the weld bead, ensuring its uniform size. A set of fixed laser cutting parameters such as power, speed, and focal length can be used to complete the processing, without the need for frequent parameter adjustments, saving debugging time and ensuring the quality of laser cutting.

[0019] Preferably, the moving component includes two symmetrically arranged first L-shaped blocks, and two T-shaped guide rods are inserted into the side wall of each first L-shaped block. The T-shaped guide rods are fixed to the side wall of the mounting head, and a fourth spring is sleeved on the side wall of each T-shaped guide rod. Two fourth sleeves are fixedly connected to the top of each first L-shaped block, and a fourth sleeve rod is inserted into each fourth sleeve. A connecting block is fixedly connected to the upper end of each fourth sleeve rod, and the connecting block is fixed to the side wall of the moving block. A fifth spring is sleeved on the side wall of each fourth sleeve, and the movement of the moving block is driven by a pushing component.

[0020] By adopting the above technical solution, when the width of the weld bead is greater than the normal width, the protruding part can abut against the arc-shaped surface, thereby pushing the two grinding blocks and the moving block to move away from each other. At the same time, the first L-shaped block is moved by the connecting block, the fourth sleeve rod and the fourth sleeve tube. The fourth spring is compressed and the moving block and the grinding block are pushed downward by the pushing component.

[0021] Preferably, the pushing assembly includes a second L-shaped block fixedly connected to the top of each connecting block, and a pushing block is fixedly connected to the top of the second L-shaped block. A plurality of arc-shaped blocks are fixedly connected to the side wall of the rotating rod, and the arc-shaped blocks are able to slide on the top of the pushing block.

[0022] By adopting the above technical solution, when the width of the weld bead is greater than the normal width, the protruding part can abut against the arc-shaped surface, thereby pushing the two grinding blocks and the moving block away from each other. At the same time, the first L-shaped block is moved by the connecting block, the fourth sleeve rod, and the fourth sleeve tube, and the fourth spring is compressed. Furthermore, when the connecting block moves, it can drive the pushing block to move through the second L-shaped block, so that the pushing block moves directly below the rotating rod. When the rotating rod rotates, it can drive the arc-shaped block to rotate. When the arc-shaped block abuts against the pushing block, it can push the second L-shaped block downward. At the same time, the moving block and the grinding block are driven downward by the connecting block.

[0023] A method for removing weld beads from welded steel pipes, using the aforementioned weld bead removal equipment, includes the following steps: S1: The steel strip is spirally welded by a spiral welding machine. The welded steel pipe is spirally conveyed forward by a conveyor frame. During the conveying process, when it is necessary to remove the weld bead on the outside of the steel pipe, the laser cutting robot and the installation head drive the laser cutting head to move to the laser cutting position and perform laser cutting on the weld bead. At the same time, the end of the top rod abuts against the side wall of the pipe. S2: At this time, the connecting plate can be pushed to move away from the nozzle. At the same time, the second spring is stretched and the third spring gradually returns to its original position. Simultaneously, the push plate is driven to move away from the sliding block. The scraper can move upward along the second through hole under the action of the first spring, so that the upper end of the push rod gradually slides upward along the inclined plane. After the third spring returns to its original position, when the connecting plate continues to move, the third spring can pull the sliding block to move away from the nozzle along the mounting groove, so that the first through hole is aligned with the inner hole of the nozzle, so that the laser can pass through the first through hole and the nozzle normally, ensuring normal laser cutting effect. S3: During cutting, when the mounting head moves the laser cutting head, it can move the grinding disc, and through the moving component, it can move the moving block and the grinding block, so that the grinding disc moves to the top of the weld bead. At the same time, the two grinding blocks move to both sides of the weld bead. When laser cutting is performed, the motor is started. The rotation of the motor drives the rotating rod and the grinding disc to rotate. When the height of the weld bead is higher than the normal height, the top protruding part can be ground, thereby controlling the height of the weld bead. S4: When the width of the weld bead is greater than the normal width, the protruding part can abut against the arc surface, thereby pushing the two grinding blocks and the moving block away from each other. At the same time, the first L-shaped block is moved through the connecting block, the fourth sleeve rod and the fourth sleeve tube. The fourth spring is compressed. When the connecting block moves, the second L-shaped block can drive the pushing block to move, so that the pushing block moves to the bottom of the rotating rod. S5: When the rotating rod rotates, it can drive the arc block to rotate. When the arc block abuts against the pushing block, it can push the second L-shaped block to move downward. At the same time, the connecting block drives the moving block and the grinding block to move downward. The fifth spring is compressed. When the arc block passes the pushing block, the moving block and the grinding block can move upward and reset under the action of the fifth spring. This process is repeated so that the moving block and the grinding block can move back and forth, allowing the grinding block to grind the protruding parts on both sides of the weld bead. This allows for control of the width of the weld bead, which in turn facilitates control of the height and width of the weld bead, ensuring uniform dimensions. A set of fixed laser cutting parameters, such as power, speed, and focal length, can be used to complete the processing without frequent parameter adjustments, saving debugging time and ensuring the quality of laser cutting. S6: After the laser cutting is completed, the laser cutting robot and the mounting head drive the laser cutting head to move, and the end of the push rod is separated from the steel pipe. At this time, the connecting plate can move towards the nozzle under the action of the second spring. At the same time, the sliding block is driven to slide into the mounting groove through the telescopic component, and the push plate moves synchronously. When the sliding block abuts against the side wall of the mounting groove, the sliding block stops moving. At this time, the fixed plate is aligned with the inner hole of the nozzle. S7: When the connecting plate continues to move, the third sleeve rod can slide into the third sleeve tube, the third spring is compressed, and the push plate moves into the sliding block, so that the inclined surface abuts against the upper end of the push rod, and the upper end of the push rod slides down along the inclined surface. At the same time, the first sleeve rod slides down along the first sleeve tube, the first spring is stretched, and the scraper moves down, and the scraper moves down along the inner wall of the nozzle orifice. It can scrape and clean the metal slag and dust on the inner wall of the nozzle orifice, so as to avoid the laser beam divergence or even interruption of cutting due to blockage of the laser emission channel, and avoid damage to the nozzle due to local high temperature, thus ensuring the efficiency and quality of laser cutting. In addition, the scraper can also play a sealing and protective role. When not in use, it can seal and protect the inside of the laser cutting head to prevent contamination by dust and water stains, thus ensuring its performance and lifespan. S8: At the same time, during laser cutting, the coolant and heat dissipation fins can cool the laser cutting head, ensuring its performance and lifespan.

[0024] In summary, Advantage 1: After removing the weld bead through laser cutting, it is easy to scrape and clean the molten metal slag and dust on the inner wall of the nozzle orifice, avoiding laser beam divergence or even interruption of cutting due to blockage of the laser emission channel, and avoiding damage to the nozzle due to local high temperature, thus ensuring the efficiency and quality of laser cutting. Advantage 2: Before laser cutting to remove the weld bead, it is easy to control the height and width of the weld bead, ensuring uniform size. A fixed set of laser cutting parameters, such as power, speed, and focal length, can be used to complete the processing, eliminating the need for frequent parameter adjustments, saving debugging time, and ensuring the quality of laser cutting. Attached Figure Description

[0025] Figure 1 This is a schematic diagram illustrating the usage state of the present invention; Figure 2 This is a schematic diagram showing the positions of the laser cutting head, the first control mechanism, and the second control mechanism in this invention; Figure 3 This is a schematic diagram of the structure of the first control mechanism and the second control mechanism in this invention; Figure 4 This is a schematic diagram of the structure of the driving component in this invention; Figure 5 This is a schematic diagram showing the location of the cleaning mechanism in this invention; Figure 6 This is a partial cross-sectional view of the nozzle in this invention; Figure 7 This is a partial cross-sectional view of the second and third sleeves in this invention. Figure 8This is a cross-sectional view of the sliding block in this invention. Figure 9 for Figure 1 Enlarged view of point A in the middle; Figure 10 for Figure 3 Enlarged view of section B in the middle.

[0026] In the diagram: 1. Laser cutting robot; 101. Mounting head; 201. First sleeve; 202. First sleeve; 203. First spring; 204. Push rod; 205. Push plate; 206. Inclined surface; 301. Connecting plate; 302. Top rod; 303. Second sleeve; 304. Second sleeve; 305. Second spring; 401. Third sleeve; 402. Third sleeve; 403. Third spring; 501. Chamber; 502. Heat dissipation fins; 601. Fixing plate; 602. Motor; 603. Rotating rod; 604. Grinding disc; 701. Moving block 702. Grinding block; 703. Arc-shaped surface; 801. T-shaped guide rod; 802. First L-shaped block; 803. Fourth spring; 804. Fourth sleeve; 805. Fourth sleeve rod; 806. Fifth spring; 807. Connecting block; 901. Arc-shaped block; 902. Second L-shaped block; 903. Pushing block; 10. Laser cutting head; 1001. Nozzle; 1101. Mounting groove; 1102. Sliding block; 1103. First through hole; 1104. Second through hole; 1105. Fixed plate; 1106. Scraper; 12. Spiral welding machine; 13. Conveyor frame. Detailed Implementation

[0027] 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.

[0028] Example 1 Please see Figures 1-10 The diagram shows a welding pipe rebar removal device, including an mounting head 101 mounted on a laser cutting robot 1. A laser cutting head 10 is fixedly connected to the mounting head 101. The laser cutting robot 1 and the laser cutting head 10 are well-known technologies in this field and will not be described in detail here. The laser cutting head 10 includes a nozzle 1001. The welding pipe rebar removal device also includes: A cleaning mechanism is installed on the side wall of nozzle 1001 to clean the molten metal slag and dust on the inner wall of the nozzle 1001 orifice. The cleaning mechanism includes a mounting groove 1101 on the side wall of the nozzle 1001, and a sliding block 1102 is slidably connected in the mounting groove 1101. The top of the sliding block 1102 is provided with a first through hole 1103 and a second through hole 1104. A scraper 1106 is connected in the second through hole 1104 through a lifting mechanism, so that the scraper 1106 can slide on the inner wall of the nozzle 1001 and scrape off and clean the molten metal slag and dust.

[0029] The lifting mechanism includes a fixed plate 1105 fixedly connected to the top of the second through hole 1104, and two first sleeves 202 fixedly connected to the bottom of the fixed plate 1105. A first sleeve rod 201 is inserted into each first sleeve 202. The lower end of the first sleeve rod 201 is fixed to the top of the scraper 1106, and the upper end of the first sleeve rod 201 is fixed to the top of the fixed plate 1105 by a first spring 203. A push rod 204 is fixedly connected to the top of the scraper 1106, and a push plate 205 is inserted into the side wall of the nozzle 1001. The push plate 205 is connected to the side wall of the nozzle 1001 through a moving mechanism, and the side wall of the push plate 205 is provided with... There is an inclined surface 206, which allows the upper end of the push rod 204 to slide along the inclined surface 206. The moving mechanism drives the push plate 205 to move into the sliding block 1102, so that the inclined surface 206 abuts against the upper end of the push rod 204, causing the upper end of the push rod 204 to slide downward along the inclined surface 206. At the same time, the first sleeve rod 201 slides downward along the first sleeve 202, the first spring 203 is stretched, and drives the scraper 1106 to move downward, and causes the scraper 1106 to move downward along the inner wall of the nozzle 1001 orifice, which can scrape and clean the metal slag and dust on the inner wall of the nozzle 1001 orifice.

[0030] The moving mechanism includes a connecting plate 301 fixedly connected to the side wall of the push plate 205, and a push rod 302 fixedly connected to the side wall of the connecting plate 301. Two second sleeves 303 are fixedly connected to the side wall of the connecting plate 301, and a second sleeve rod 304 is inserted into the second sleeve 303. The other end of the second sleeve rod 304 is fixed to the side wall of the nozzle 1001, and the second sleeve rod 304 is fixed to the side wall of the connecting plate 301 by a second spring 305. The sliding block 1102 is connected to the side wall of the connecting plate 301 through a telescopic assembly. After the laser cutting is completed, the laser cutting... The cutting robot 1 and the mounting head 101 drive the laser cutting head 10 to move, causing the end of the push rod 302 to detach from the steel pipe. At this time, the connecting plate 301 can move towards the nozzle 1001 under the action of the second spring 305. At the same time, the sliding block 1102 is driven to slide into the mounting groove 1101 through the telescopic component, and the push plate 205 moves synchronously. When the sliding block 1102 abuts against the side wall of the mounting groove 1101, the sliding block 1102 stops moving. At this time, the second through hole 1104 is aligned with the inner hole of the nozzle 1001.

[0031] The telescopic assembly includes two third sleeve rods 401 fixedly connected to the side wall of the connecting plate 301, and a third sleeve 402 is sleeved on the side wall of the third sleeve rod 401. The other end of the third sleeve 402 is fixed to the side wall of the sliding block 1102, and the third sleeve rod 401 is fixed to the side wall of the sliding block 1102 by a third spring 403. After the second through hole 1104 is aligned with the inner hole of the nozzle 1001, when the connecting plate 301 continues to move, the third sleeve rod 401 can slide into the third sleeve 402, the third spring 403 is compressed, and the push plate 205 moves into the sliding block 1102.

[0032] The sliding block 1102 has a cooling mechanism on its side wall, which is used to cool the laser cutting head 10. The cooling mechanism includes multiple heat dissipation fins 502 fixedly inserted into the side wall of the sliding block 1102. The sliding block 1102 is hollow and has a chamber 501 inside. The chamber 501 is filled with coolant, and the heat dissipation fins 502 penetrate into the chamber 501. During laser cutting, the coolant and the heat dissipation fins 502 can cool the laser cutting head 10, ensuring its performance and lifespan.

[0033] The side wall of the mounting head 101 is provided with a first control mechanism and a second control mechanism. The first control mechanism is used to control the height of the weld bead before laser cutting, and the second control mechanism is used to control the width of the weld bead before laser cutting. The first control mechanism includes a fixing plate 601 fixedly connected to the side wall of the mounting head 101. A motor 602 is fixedly connected to the side wall of the fixing plate 601, and a rotating rod 603 is fixedly connected to the output end of the motor 602. A grinding disc 604 is fixedly connected to the end of the rotating rod 603. The grinding disc 604 can pre-grind the top of the weld bead. When cutting, when the mounting head 101 moves the laser cutting head 10, it can move the grinding disc 604, so that the grinding disc 604 moves to the top of the weld bead. As the spirally welded steel pipe is spirally conveyed, the motor 602 is started. The rotation of the motor 602 drives the rotating rod 603 and the grinding disc 604 to rotate. When the height of the weld bead is higher than the normal height, the top protruding part can be ground, thereby controlling the height of the weld bead.

[0034] The second control mechanism includes two moving blocks 701, and a grinding block 702 is fixedly connected to the side wall of each moving block 701. The bottom of the grinding block 702 is provided with an arc-shaped surface 703, and the grinding block 702 can pre-grind both sides of the weld bead. The moving blocks 701 are connected to the side wall of the mounting head 101 through a moving component. During cutting, when the mounting head 101 moves the laser cutting head 10, it can move the grinding disc 604, and move the moving blocks 701 and grinding blocks 702 through the moving component. The two grinding blocks 702 move to both sides of the weld bead, and when the width of the weld bead... When the width is greater than normal, the protruding part can abut against the arc surface 703, thereby pushing the two grinding blocks 702 and the moving block 701 away from each other. The moving component drives the moving block 701 and the grinding block 702 to move back and forth, so that the grinding block 702 can grind the protruding parts on both sides of the weld bead. The width of the weld bead can be controlled, which makes it easier to control the height and width of the weld bead, ensuring its uniform size. A set of fixed laser cutting parameters such as power, speed and focal length can be used to complete the processing without frequent parameter adjustments, saving debugging time and ensuring the quality of laser cutting.

[0035] The movable component includes two symmetrically arranged first L-shaped blocks 802, and two T-shaped guide rods 801 are inserted into the side wall of each first L-shaped block 802. The T-shaped guide rods 801 are fixed to the side wall of the mounting head 101, and a fourth spring 803 is sleeved on the side wall of each T-shaped guide rod 801. Two fourth sleeves 804 are fixedly connected to the top of each first L-shaped block 802, and a fourth sleeve rod 805 is inserted into each fourth sleeve 804. A connecting block 807 is fixedly connected to the upper end of the fourth sleeve rod 805, and the connecting block 807 is fixed to the side wall of the movable block 701. Each fourth sleeve 804 has a fifth spring 806 fitted on its side wall, and the movement of the moving block 701 is driven by the pushing assembly. When the width of the weld bead is greater than the normal width, the protruding part can abut against the arc surface 703, thereby pushing the two grinding blocks 702 and the moving block 701 away from each other. At the same time, the first L-shaped block 802 is moved by the connecting block 807, the fourth sleeve rod 805 and the fourth sleeve 804. The fourth spring 803 is compressed and the moving block 701 and the grinding block 702 are pushed downward by the pushing assembly.

[0036] The pushing assembly includes a second L-shaped block 902 fixedly connected to the top of each connecting block 807, and a pushing block 903 fixedly connected to the top of the second L-shaped block 902. Multiple arc-shaped blocks 901 are fixedly connected to the side wall of the rotating rod 603, and the arc-shaped blocks 901 can slide on the top of the pushing block 903. When the width of the weld bead is greater than the normal width, the protruding part can abut against the arc surface 703, thereby pushing the two grinding blocks 702 and the moving block 701 away from each other. At the same time, the first L-shaped block 802 is moved by the connecting block 807, the fourth sleeve rod 805 and the fourth sleeve tube 804, and the fourth spring 803 is compressed. When the connecting block 807 moves, the pushing block 903 can be moved by the second L-shaped block 902, so that the pushing block 903 moves to directly below the rotating rod 603. When the rotating rod 603 rotates, it can drive the arc block 901 to rotate. When the arc block 901 abuts against the pushing block 903, it can push the second L-shaped block 902 to move downward. At the same time, the moving block 701 and the grinding block 702 are driven to move downward through the connecting block 807.

[0037] A method for removing weld beads from welded steel pipes, using the aforementioned weld bead removal equipment, includes the following steps: S1: The steel strip is spirally welded by the spiral welding machine 12, and the welded steel pipe is spirally conveyed forward by the conveyor frame 13. The spiral welding machine 12 and the conveyor frame 13 are well known technologies in this field and will not be described in detail here. When conveying, when it is necessary to remove the weld bead on the outside of the steel pipe, the laser cutting robot 1 and the mounting head 101 drive the laser cutting head 10 to move, so that the laser cutting head 10 moves to the laser cutting position and performs laser cutting operation on the weld bead. At the same time, the end of the top rod 302 abuts against the side wall of the pipe. S2: At this time, the connecting plate 301 can be pushed to move away from the nozzle 1001. At the same time, the second spring 305 is stretched and the third spring 403 gradually returns to its original position. Simultaneously, the push plate 205 is driven to move away from the sliding block 1102. The scraper 1106 can move upward along the second through hole 1104 under the action of the first spring 203. The upper end of the push rod 204 gradually slides upward along the inclined surface 206. After the third spring 403 returns to its original position, when the connecting plate 301 continues to move, the third spring 403 can pull the sliding block 1102 to move away from the nozzle 1001 along the mounting groove 1101. This aligns the first through hole 1103 with the inner hole of the nozzle 1001, allowing the laser to pass normally through the first through hole 1103 and the nozzle 1001, ensuring normal laser cutting effect. S3: During cutting, when the mounting head 101 moves the laser cutting head 10, it can move the grinding disc 604, and through the moving component, it can move the moving block 701 and the grinding block 702, so that the grinding disc 604 moves to the top of the weld bead. At the same time, the two grinding blocks 702 move to both sides of the weld bead. When laser cutting is performed, the motor 602 is started. The rotation of the motor 602 drives the rotating rod 603 and the grinding disc 604 to rotate. When the height of the weld bead is higher than the normal height, the top protruding part can be ground, thereby controlling the height of the weld bead. S4: When the width of the weld bead is greater than the normal width, the protruding part can abut against the arc surface 703, thereby pushing the two grinding blocks 702 and the moving block 701 away from each other. At the same time, the first L-shaped block 802 is moved by the connecting block 807, the fourth sleeve rod 805 and the fourth sleeve tube 804, the fourth spring 803 is compressed, and when the connecting block 807 moves, the second L-shaped block 902 can drive the pushing block 903 to move, so that the pushing block 903 moves to directly below the rotating rod 603. S5: When the rotating rod 603 rotates, it can drive the arc block 901 to rotate. When the arc block 901 abuts against the pushing block 903, it can push the second L-shaped block 902 to move downward. At the same time, the connecting block 807 drives the moving block 701 and the grinding block 702 to move downward. The fifth spring 806 is compressed. When the arc block 901 passes the pushing block 903, the moving block 701 and the grinding block 702 can move upward and reset under the action of the fifth spring 806. This process is repeated so that the moving block 701 and the grinding block 702 can move back and forth, so that the grinding block 702 can grind the protruding parts on both sides of the weld bead. The width of the weld bead can be controlled, which makes it easier to control the height and width of the weld bead, ensuring that its size is uniform. A set of fixed laser cutting parameters such as power, speed and focal length can be used to complete the processing without frequent parameter adjustments, saving debugging time and ensuring the quality of laser cutting. S6: After the laser cutting is completed, the laser cutting robot 1 and the mounting head 101 drive the laser cutting head 10 to move, and the end of the push rod 302 is separated from the steel pipe. At this time, the connecting plate 301 can move towards the nozzle 1001 under the action of the second spring 305. At the same time, the sliding block 1102 is driven to slide into the mounting groove 1101 through the telescopic component, and the push plate 205 is driven to move synchronously. When the sliding block 1102 abuts against the side wall of the mounting groove 1101, the sliding block 1102 stops moving. At this time, the fixed plate 1105 is aligned with the inner hole of the nozzle 1001. S7: When the connecting plate 301 continues to move, the third sleeve rod 401 slides into the third sleeve 402, the third spring 403 is compressed, and the push plate 205 moves into the sliding block 1102, so that the inclined surface 206 abuts against the upper end of the push rod 204, causing the upper end of the push rod 204 to slide downward along the inclined surface 206. At the same time, the first sleeve rod 201 slides downward along the first sleeve 202, the first spring 203 is stretched, and the scraper 1106 moves downward, causing the scraper 1106 to slide downward along the first sleeve 202. As the inner wall of the nozzle 1001 moves downward, it can scrape and clean the molten metal slag and dust on the inner wall of the nozzle 1001, preventing the laser beam from diverging or even interrupting the cutting due to blockage of the laser emission channel. It also prevents damage to the nozzle 1001 due to local high temperature, ensuring the efficiency and quality of laser cutting. In addition, the scraper 1106 can also play a sealing and protective role. When not in use, it can seal and protect the inside of the laser cutting head 10 to prevent contamination by dust and water stains, ensuring its performance and lifespan. S8: At the same time, during laser cutting, the coolant and heat dissipation fins 502 can cool the laser cutting head 10, ensuring its performance and lifespan.

[0038] 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.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding pipe weld bead removal device, comprising an mounting head (101) mounted on a laser cutting robot (1), wherein a laser cutting head (10) is fixedly connected to the mounting head (101), and the laser cutting head (10) includes a nozzle (1001), characterized in that, The weld bead removal equipment for welded steel pipes also includes: A cleaning mechanism is provided on the side wall of the nozzle (1001) for cleaning the molten metal slag and dust on the inner wall of the nozzle (1001) orifice. The cleaning mechanism includes a mounting groove (1101) on the side wall of the nozzle (1001), and a sliding block (1102) is slidably connected in the mounting groove (1101). The top of the sliding block (1102) is provided with a first through hole (1103) and a second through hole (1104), and a scraper (1106) is connected in the second through hole (1104) through a lifting mechanism, so that the scraper (1106) can slide on the inner wall of the nozzle (1001) and scrape off and clean the molten metal slag and dust. The lifting mechanism includes a fixed plate (1105) fixedly connected to the top of the second through hole (1104), and two first sleeves (202) fixedly connected to the bottom of the fixed plate (1105). A first sleeve rod (201) is inserted into each first sleeve (202). The lower end of the first sleeve rod (201) is fixed to the top of the scraper (1106), and the upper end of the first sleeve rod (201) is fixed to the top of the fixed plate (1105) by a first spring (203). A push rod (204) is fixedly connected to the top of the scraper (1106), and a push plate (205) is inserted into the side wall of the nozzle (1001). The push plate (205) is connected to the side wall of the nozzle (1001) by a moving mechanism, and the side wall of the push plate (205) is provided with an inclined surface (206) so that the upper end of the push rod (204) can slide along the inclined surface (206). The moving mechanism includes a connecting plate (301) fixedly connected to the side wall of the push plate (205), and a top rod (302) fixedly connected to the side wall of the connecting plate (301). Two second sleeves (303) are fixedly connected to the side wall of the connecting plate (301), and a second sleeve rod (304) is inserted inside the second sleeve (303). The other end of the second sleeve rod (304) is fixed to the side wall of the nozzle (1001), and the second sleeve rod (304) is fixed to the side wall of the connecting plate (301) by a second spring (305). The sliding block (1102) is connected to the side wall of the connecting plate (301) by a telescopic assembly. The telescopic assembly includes two third sleeve rods (401) fixedly connected to the side wall of the connecting plate (301), and a third sleeve (402) is sleeved on the side wall of the third sleeve rod (401). The other end of the third sleeve (402) is fixed to the side wall of the sliding block (1102), and the third sleeve rod (401) is fixed to the side wall of the sliding block (1102) by a third spring (403).

2. The welding bead removal equipment for welded steel pipes according to claim 1, characterized in that: The sliding block (1102) has a cooling mechanism on its side wall, which is used to cool the laser cutting head (10). The cooling mechanism includes multiple heat dissipation fins (502) fixedly inserted into the side wall of the sliding block (1102). The sliding block (1102) is hollow and has a cavity (501) inside. The cavity (501) is filled with coolant, and the heat dissipation fins (502) penetrate into the cavity (501).

3. The welding bead removal equipment for welded steel pipes according to claim 2, characterized in that: The mounting head (101) has a first control mechanism and a second control mechanism on its side wall. The first control mechanism is used to control the height of the weld bead before laser cutting, and the second control mechanism is used to control the width of the weld bead before laser cutting. The first control mechanism includes a fixing plate (601) fixedly connected to the side wall of the mounting head (101). A motor (602) is fixedly connected to the side wall of the fixing plate (601), and a rotating rod (603) is fixedly connected to the output end of the motor (602). A grinding disc (604) is fixedly connected to the end of the rotating rod (603), and the grinding disc (604) can pre-grind the top of the weld bead.

4. The welding bead removal equipment for welded steel pipes according to claim 3, characterized in that: The second control mechanism includes two moving blocks (701), and each moving block (701) has a grinding block (702) fixedly connected to its side wall. The bottom of the grinding block (702) is provided with an arc-shaped surface (703), and the grinding block (702) can pre-grind both sides of the weld bead. The moving block (701) is connected to the side wall of the mounting head (101) through a moving component.

5. The welding bead removal equipment for welded steel pipes according to claim 4, characterized in that: The moving component includes two symmetrically arranged first L-shaped blocks (802), and two T-shaped guide rods (801) are inserted into the side wall of each first L-shaped block (802). The T-shaped guide rods (801) are fixed to the side wall of the mounting head (101), and a fourth spring (803) is sleeved on the side wall of each T-shaped guide rod (801). Two fourth sleeves (804) are fixedly connected to the top of each first L-shaped block (802), and a fourth sleeve rod (805) is inserted into each fourth sleeve (804). A connecting block (807) is fixedly connected to the upper end of the fourth sleeve rod (805), and the connecting block (807) is fixed to the side wall of the moving block (701). A fifth spring (806) is sleeved on the side wall of each fourth sleeve (804), and the movement of the moving block (701) is driven by a pushing component.

6. The welding bead removal equipment for welded steel pipes according to claim 5, characterized in that: The pushing assembly includes a second L-shaped block (902) fixedly connected to the top of each connecting block (807), and a pushing block (903) fixedly connected to the top of the second L-shaped block (902). A plurality of arc-shaped blocks (901) are fixedly connected to the side wall of the rotating rod (603), and the arc-shaped blocks (901) can slide on the top of the pushing block (903).

7. A method for removing weld beads from welded steel pipes, using the weld bead removal equipment for welded steel pipes as described in claim 6, characterized in that: Includes the following steps: S1: The steel strip is spirally welded by the spiral welding machine (12), and the welded steel pipe is spirally conveyed forward by the conveyor frame (13). When conveying, when it is necessary to remove the weld beads on the outside of the steel pipe, the laser cutting robot (1) and the installation head (101) drive the laser cutting head (10) to move, so that the laser cutting head (10) moves to the laser cutting position and performs laser cutting operation on the weld beads. At the same time, the end of the top rod (302) abuts against the side wall of the pipe. S2: At this time, the connecting plate (301) can be pushed to move away from the nozzle (1001), and at the same time, the second spring (305) is stretched and the third spring (403) gradually resets. At the same time, the push plate (205) is driven to move away from the sliding block (1102). The scraper (1106) can move upward along the second through hole (1104) under the action of the first spring (203), so that the upper end of the push rod (204) gradually slides upward along the inclined plane (206). After the third spring (403) is reset, when the connecting plate (301) continues to move, the third spring (403) can pull the sliding block (1102) to move away from the nozzle (1001) along the mounting groove (1101), so that the first through hole (1103) is aligned with the inner hole of the nozzle (1001), so that the laser can pass through the first through hole (1103) and the nozzle (1001) normally. S3: When cutting, when the mounting head (101) moves the laser cutting head (10), it can move the grinding disc (604), and through the moving component, it can move the moving block (701) and the grinding block (702), so that the grinding disc (604) moves to the top of the weld bead, and at the same time, the two grinding blocks (702) move to both sides of the weld bead. When laser cutting is performed, the motor (602) is started. The rotation of the motor (602) drives the rotating rod (603) and the grinding disc (604) to rotate. When the height of the weld bead is higher than the normal height, the top protruding part can be ground. S4: When the width of the weld bead is greater than the normal width, the protruding part can abut against the arc surface (703), thereby pushing the two grinding blocks (702) and the moving block (701) to move away from each other. At the same time, the first L-shaped block (802) is moved by the connecting block (807), the fourth sleeve rod (805) and the fourth sleeve tube (804), the fourth spring (803) is compressed, and when the connecting block (807) moves, the second L-shaped block (902) can drive the pushing block (903) to move, so that the pushing block (903) moves to the position directly below the rotating rod (603); S5: When the rotating rod (603) rotates, it can drive the arc block (901) to rotate. When the arc block (901) abuts against the push block (903), it can push the second L-shaped block (902) to move downward. At the same time, the connecting block (807) drives the moving block (701) and the grinding block (702) to move downward. The fifth spring (806) is compressed. When the arc block (901) passes the push block (903), the moving block (701) and the grinding block (702) can move upward and reset under the action of the fifth spring (806). By repeating this process, the moving block (701) and the grinding block (702) can move back and forth, so that the grinding block (702) can grind the protruding parts on both sides of the weld bead. The width of the weld bead can be controlled, which makes it easier to control the height and width of the weld bead and ensure its uniform size. S6: After the laser cutting is completed, the laser cutting head (10) is moved by the laser cutting robot (1) and the mounting head (101), and the end of the top rod (302) is separated from the steel pipe. At this time, the connecting plate (301) can move towards the nozzle (1001) under the action of the second spring (305). At the same time, the sliding block (1102) is moved into the mounting groove (1101) by the telescopic component, and the push plate (205) is moved synchronously. When the sliding block (1102) abuts against the side wall of the mounting groove (1101), the sliding block (1102) stops moving. At this time, the fixing plate (1105) is aligned with the inner hole of the nozzle (1001). S7: When the connecting plate (301) continues to move, the third sleeve rod (401) can slide into the third sleeve (402), the third spring (403) is compressed, and the push plate (205) is driven to move into the sliding block (1102), so that the inclined plane (206) abuts against the upper end of the push rod (204), so that the upper end of the push rod (204) slides down along the inclined plane (206), and at the same time, the first sleeve rod (201) slides down along the first sleeve (202), and the first spring (203) is stretched. The scraper (1106) moves downward and moves along the inner wall of the nozzle (1001) orifice. This scrapes and cleans the molten metal slag and dust on the inner wall of the nozzle (1001) orifice, preventing the laser beam from diverging or even interrupting the cutting process due to blockage of the laser emission channel. It also prevents damage to the nozzle (1001) due to local high temperature. Furthermore, the scraper (1106) can also provide a sealing and protection effect, sealing and protecting the inside of the laser cutting head (10) when not in use. S8: At the same time, during laser cutting, the laser cutting head (10) can be cooled down by the action of coolant and heat dissipation fins (502).

Images