A laser pipe cutting machine for large pipe diameter pipe processing

Abstract

The application relates to the field of laser cutting, in particular to a laser pipe cutting machine for large-diameter pipe machining, which comprises a base, a plurality of groups of clamping mechanisms are arranged on the base at equal intervals, a pipe is arranged on the upper end of the clamping mechanism, a moving frame is slidably arranged at the two ends of the base, a horizontal moving cylinder is fixedly arranged at the two ends of the base, the output end of the horizontal moving cylinder is fixedly connected with the moving frame, a supporting and fixing mechanism for supporting the end of the pipe is arranged in each moving frame, and a rotating pipe cutting mechanism which moves along the axial direction of the pipe is arranged between the two groups of supporting and fixing mechanisms. The laser cutting process from the inside to the outside of the pipe can be realized, the crawling cutting assembly rotates around the axial direction of the pipe during the rotating cutting, the distance of the laser cutting during the circumferential rotation is kept consistent, and the laser cutting quality is improved.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, and in particular to a laser pipe cutting machine for processing large-diameter pipes. Background Technology

[0002] A laser tube cutting machine is a CNC device that uses a high-energy laser beam to precisely cut metal tubes. It is widely used in industries such as automotive manufacturing, aerospace, construction and decoration, furniture, fitness equipment, oil pipelines, and machining, and is suitable for the efficient cutting of various materials including carbon steel, stainless steel, aluminum alloys, and copper tubes.

[0003] In the actual cutting process of laser pipe cutting machines, they often come into contact with pipes with large diameters. Current laser pipe cutting machines still use the traditional outside-in cutting method to cut large diameter pipes. When the laser cuts from the outside in, the outer wall is melted by high temperature first, while the inner wall remains intact, resulting in uneven distribution of thermal stress. This can easily cause the pipe to warp, bend or deform locally, seriously affecting the quality of laser cutting. Summary of the Invention

[0004] The purpose of this invention is to provide a laser pipe cutting machine for processing large-diameter pipes, thereby solving the aforementioned technical problems.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A laser pipe cutting machine for processing large-diameter pipes includes a base with multiple sets of clamping mechanisms evenly spaced on the base. The pipe is placed on the upper end of the clamping mechanism. Movable frames are slidably installed at both ends of the base. Transverse cylinders are fixedly installed at both ends of the base. The output end of the transverse cylinder is fixedly connected to the movable frame. Each movable frame is provided with a support and fixing mechanism for supporting the end of the pipe. A rotary pipe cutting mechanism that travels along the axis of the pipe is provided between two sets of support and fixing mechanisms.

[0007] The rotary pipe cutting mechanism includes a central column, with ring frames fixedly connected to both ends of the central column via connecting plates. A crawling cutting assembly is installed between two ring frames for limiting the movement. Connecting seats are fixedly installed at both ends of the central column extending outward along the axis. End caps are fixedly installed on the side walls of the connecting seats. Rotary brackets are radially slidably installed inside the connecting seats. The rotating brackets are arranged in a cross shape, and each rotating bracket has a rotatable wheel installed at its end. The wheel abuts against the inner wall of the pipe. A walking motor is fixedly installed on the side wall of the bottom rotating bracket, and the output end of the walking motor is connected to the walking wheel.

[0008] The crawling cutting assembly includes an upper bracket, a lower bracket fixedly connected to the bottom of the upper bracket via a limiting plate, two annular frames spaced apart to form a limiting track, the limiting plate being adapted to slide within the limiting track, a laser cutting head fixedly disposed in the center of the upper bracket, the laser cutting head crawling circumferentially along the annular frame to perform laser cutting on the inner wall of the pipe.

[0009] As a further embodiment of the present invention: an outer ring groove is provided on the outer wall of the ring frame, the upper bracket is adapted to be slidably installed in the outer ring groove, an inner ring groove is provided on the outer wall of the central column, and the lower bracket is adapted to be slidably installed in the inner ring groove.

[0010] As a further embodiment of the present invention: a camera is fixedly installed inside the upper bracket, the camera is located on both sides of the laser cutting head, a crawling gear is rotatably installed inside the lower bracket, a crawling motor is fixedly installed on the side wall of the lower bracket, the output end of the crawling motor is connected to the crawling gear, and a toothed groove is provided circumferentially on the inner wall of the ring frame, the crawling gear meshing with the toothed groove.

[0011] As a further embodiment of the present invention: the connecting seat is provided with a rotating cavity, a turntable is rotatably installed in the rotating cavity, a dual-axis motor is fixedly installed inside the central column, the two output ends of the dual-axis motor are respectively fixedly connected to the corresponding turntable, and inclined grooves are uniformly provided on the turntable.

[0012] As a further embodiment of the present invention: a radial groove is provided on the side wall of the connecting seat, the radial groove is connected to the rotating cavity, a sliding plate is slidably installed in the radial groove, the sliding plate is fixedly connected to the rotating bracket, and a pin is fixedly provided at the end of the sliding plate facing the turntable, the pin being adapted to be slidably installed in the corresponding inclined groove.

[0013] As a further embodiment of the present invention: the clamping mechanism includes a support frame and a scissor bracket. A slide rail is fixedly installed on the upper end of the support frame, and a pair of slide blocks are slidably installed on the slide rail. The bottom ends of the scissor brackets are rotatably engaged with the corresponding slide blocks. A bidirectional screw is rotatably installed inside the support frame, and adjacent bidirectional screws are connected by a transmission belt. A clamping motor is fixedly installed on the outer wall of one of the support frames. The output end of the clamping motor is connected to the bidirectional screw. The two threaded parts on the bidirectional screw are threadedly engaged with the scissor brackets. A clamping airbag is fixedly installed inside the scissor bracket. A synchronous shaft is transversely connected between all the scissor brackets.

[0014] As a further embodiment of the present invention: the supporting and fixing mechanism includes a lifting seat, which is slidably installed in a movable frame. A height adjustment screw is rotatably installed in the movable frame, and the height adjustment screw is threaded through the lifting seat. A guide rod is fixedly installed in the movable frame, and the guide rod slides through the lifting seat.

[0015] As a further embodiment of the present invention: an extension column is fixedly extended at one end of the lifting seat facing the pipe, an installation seat is fixedly provided at the end of the extension column, a positioning hole is provided through the surface of the installation seat, a positioning rod is fixedly provided on the surface of the end cap, and the positioning rod is provided in a one-to-one correspondence with the positioning hole.

[0016] As a further embodiment of the present invention: a sliding groove is provided on the surface of the extension column along the axial direction, a movable cavity is provided inside the extension column, a limiting groove communicating with the movable cavity is provided through the bottom of the sliding groove, a sliding sleeve is slidably installed in the movable cavity, a sliding block is fixedly connected to the outer wall of the sliding sleeve by a limiting block, the sliding block is slidably installed in the sliding groove, the limiting block is slidably installed in the limiting groove, a support motor is fixedly provided on the side wall of the lifting seat, a support screw is connected to the output end of the support motor, the support screw extends into the movable cavity and is threadedly engaged with the sliding sleeve.

[0017] As a further embodiment of the present invention: the top end of the sliding block is rotatably engaged with one end of the connecting rod, the other end of the connecting rod is rotatably engaged with the support rod, the bottom end of the support rod is rotatably mounted on the extension column, the top end of the support rod is rotatably mounted with a rotating seat, a rubber pad is fixedly disposed on the rotating seat, and the rubber pad is disposed perpendicular to the inner wall of the pipe.

[0018] The beneficial effects of this invention are:

[0019] (1) By setting a radially adjustable rotating bracket, when preparing to cut, the cross-shaped rotating brackets open outwards simultaneously until the traveling wheel abuts against the inner wall of the pipe, thus forming a stable cross support structure. When the traveling motor drives the traveling wheel to rotate, the traveling wheel will drive the central column and the crawling cutting component to move linearly along the pipe axis, so that the crawling cutting component can reach any position inside the pipe to perform cutting. Due to the cross support positioning effect of the rotating bracket, the central column can always remain concentric with the pipe, so that the crawling cutting component always rotates around the pipe axis when rotating and cutting, thus ensuring that the laser cutting distance is always consistent during circumferential rotation, which is beneficial to improving the laser cutting quality.

[0020] (2) By setting up a clamping mechanism, the clamping motor drives the scissor bracket to open or close around the synchronous shaft through a bidirectional screw, thereby enabling the limiting support of pipes of different diameters. When the pipe is placed, the scissor bracket will close inward until the clamping airbag and the pipe are tightly pressed together. The clamping airbag can effectively increase the contact area with the surface of the pipe to ensure the firmness of the pipe clamping.

[0021] (3) By setting up a support and fixing mechanism, when the extension column is coaxially inserted into the inside of the pipe, the support motor drives the support screw to rotate, the support screw drives the sliding sleeve to move linearly, and the sliding sleeve will drive the support rod to change angle through the sliding block and connecting rod until the support rod gradually opens and the rubber pad abuts against the inner wall of the pipe, thereby enabling the support and limiting of both ends of the pipe, so that the pipe is fixed during the laser cutting process, which improves the stability of the laser cutting process. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the full cross-section of the present invention.

[0025] Figure 3 This is a schematic diagram of the clamping mechanism in this invention.

[0026] Figure 4 This is a schematic diagram of the structure of the movable frame in this invention.

[0027] Figure 5 This is a schematic diagram of the supporting and fixing component in this invention.

[0028] Figure 6 This is a schematic diagram of the sliding sleeve in this invention.

[0029] Figure 7 This is a schematic diagram of the rotating tube cutting mechanism in this invention.

[0030] Figure 8 This is a cross-sectional structural diagram of the rotary tube cutting mechanism in this invention.

[0031] Figure 9 This is a schematic diagram of the ring frame structure in this invention.

[0032] Figure 10 This is a schematic diagram of the crawling cutting component in this invention.

[0033] Figure 11 This is a schematic diagram of the rotating bracket in this invention.

[0034] In the diagram: 1. Base; 2. Clamping mechanism; 21. Support frame; 211. Slide rail; 212. Slide block; 213. Bidirectional screw; 214. Transmission belt; 22. Scissor bracket; 221. Clamping airbag; 222. Synchronous shaft; 23. Clamping motor; 3. Moving frame; 31. Height adjustment screw; 32. Guide rod; 4. Support and fixing mechanism; 41. Lifting seat; 411. Support motor; 412. Support screw; 42. Extension column; 421. Sliding groove; 422. Limiting groove; 423. Movable cavity; 43. Mounting seat; 431. Positioning hole; 44. Sliding sleeve; 441. Limiting block; 442. Sliding block; 443. Connecting rod; 444. Support rod; 445. Rubber pad block 5. Lateral cylinder; 6. Rotary pipe cutting mechanism; 61. Central column; 611. Inner annular groove; 62. Circular frame; 621. Outer annular groove; 622. Limiting rail; 623. Gear groove; 63. Connecting seat; 631. Rotating cavity; 632. Radial slide groove; 64. End cap; 641. Positioning rod; 65. Crawling cutting assembly; 651. Upper bracket; 652. Limiting plate; 653. Lower bracket; 654. Crawling motor; 655. Crawling gear; 656. Laser cutting head; 657. Camera; 66. Rotating bracket; 661. Slide plate; 662. Pin; 663. Traveling wheel; 664. Traveling motor; 67. Dual-axis motor; 671. Turntable; 672. Inclined groove. Detailed Implementation

[0035] 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.

[0036] Please see Figure 1 and Figure 2 As shown, the present invention is a laser pipe cutting machine for processing large-diameter pipes, including a base 1, on which multiple sets of clamping mechanisms 2 are arranged at equal intervals. The pipe is placed on the upper end of the clamping mechanism 2. Movable frames 3 are slidably installed at both ends of the base 1. Transverse cylinders 5 are fixedly installed at both ends of the base 1. The output end of the transverse cylinder 5 is fixedly connected to the movable frame 3. Each movable frame 3 is provided with a support and fixing mechanism 4 for supporting the end of the pipe. A rotary pipe cutting mechanism 6 that travels along the axis of the pipe is arranged between two sets of support and fixing mechanisms 4.

[0037] Specifically, when preparing to laser cut large-diameter pipes, the pipe is first placed on the upper end of the clamping mechanism 2, which clamps and fixes the pipe to prevent it from rotating. Then, the horizontal moving cylinder 5 pushes the moving frame 3 at both ends to gradually approach the two ends of the pipe. At the same time, the height of the support and fixing mechanism 4 is adjusted to keep it concentric with the pipe. Then, the support and fixing mechanism 4 is inserted into the inside of the pipe to support and position it, ensuring that it is fixed. Then, the rotating pipe cutting mechanism 6 moves along the axis of the pipe until it reaches the designated station to perform a laser cutting process from the inside to the outside of the pipe.

[0038] like Figure 7 , Figure 8 and Figure 11 As shown, the rotary pipe cutting mechanism 6 includes a central column 61. Both ends of the central column 61 are fixedly connected to annular frames 62 via connecting plates. A crawling cutting assembly 65 is installed between the two annular frames 62 for limiting. Both ends of the central column 61 are fixedly provided with connecting seats 63 extending outward along the axis. End caps 64 are fixedly provided on the side walls of the connecting seats 63. Rotary brackets 66 are radially slidably installed inside the connecting seats 63. The rotating brackets 66 are arranged in a cross shape. Each rotating bracket 66 has a rotatably mounted wheel 663 at its end. The wheel 663 abuts against the inner wall of the pipe. A walking motor 664 is fixedly provided on the side wall of the bottom rotating bracket 66. The output end of the walking motor 664 is connected to the walking wheel 663.

[0039] Specifically, by setting radially adjustable rotating brackets 66, when preparing to cut, the cross-shaped rotating brackets 66 simultaneously open outwards until the traveling wheels 663 abut against the inner wall of the pipe, thus forming a stable cross support structure. When the traveling motor 664 drives the traveling wheels 663 to rotate, the traveling wheels 663 will drive the central column 61 and the crawling cutting assembly 65 to move linearly along the pipe axis, so that the crawling cutting assembly 65 can reach any position inside the pipe to perform cutting. Due to the cross support positioning function of the rotating brackets 66, the central column 61 can always remain concentric with the pipe, so that the crawling cutting assembly 65 always rotates around the pipe axis during rotational cutting, thereby ensuring that the laser cutting distance remains consistent during circumferential rotation, which is beneficial to improving the laser cutting quality.

[0040] It should be noted that, to prevent the cross-shaped rotating supports 66 from rotating axially inside the pipe, the travel motor 664 is mounted on the side wall of the bottom rotating support 66. This increases the counterweight and lowers the overall center of gravity of the device, ensuring stable movement. In practical applications, because the travel wheels 663 have a certain width, the friction between the travel wheels 663 and the inner wall of the pipe prevents them from easily rotating axially. Therefore, the aforementioned cross-support structure has good stability.

[0041] like Figure 9 and Figure 10 As shown, the crawling cutting assembly 65 includes an upper bracket 651. The bottom of the upper bracket 651 is fixedly connected to a lower bracket 653 via a limiting plate 652. Two annular frames 62 are spaced apart to form a limiting track 622. The limiting plate 652 is adapted to slide within the limiting track 622. A laser cutting head 656 is fixedly installed in the center of the upper bracket 651. The laser cutting head 656 crawls around the annular frame 62 to perform laser cutting on the inner wall of the pipe.

[0042] Specifically, by setting up the crawling cutting component 65, the upper bracket 651 provides installation space for the laser cutting head 656, while the lower bracket 653 provides stable support for the crawling movement. During crawling, the limiting plate 652 is always constrained to rotate within the limiting track 622, thereby ensuring that the laser cutting head 656 will not easily sway left and right, which is conducive to improving the accuracy of laser cutting.

[0043] like Figure 9 and Figure 10 As shown, an outer ring groove 621 is provided on the outer wall of the ring frame 62, and the upper bracket 651 is adapted to slide and install in the outer ring groove 621. An inner ring groove 611 is provided on the outer wall of the central column 61, and the lower bracket 653 is adapted to slide and install in the inner ring groove 611.

[0044] Specifically, during cutting, the upper bracket 651 always rotates within the outer ring groove 621, and the lower bracket 653 always rotates within the inner ring groove 611. By utilizing the limiting and supporting functions of the outer ring groove 621 and the inner ring groove 611, the stability of the crawling cutting assembly 65 during circumferential crawling is greatly improved. This helps to control the crawling speed to remain constant and avoids affecting the laser cutting quality due to changes in the crawling speed.

[0045] like Figure 9 and Figure 10 As shown, a camera 657 is fixedly installed inside the upper bracket 651, and the camera 657 is located on both sides of the laser cutting head 656. A crawling gear 655 is rotatably installed inside the lower bracket 653. A crawling motor 654 is fixedly installed on the side wall of the lower bracket 653. The output end of the crawling motor 654 is connected to the crawling gear 655. A toothed groove 623 is provided circumferentially on the inner wall of the ring frame 62, and the crawling gear 655 meshes with the toothed groove 623.

[0046] Specifically, the crawler motor 654 starts, driving the crawler gear 655 to rotate. Utilizing the meshing action between the crawler gear 655 and the tooth groove 623, the upper bracket 651 and the lower bracket 653 are driven to crawl circumferentially along the ring frame 62. The transmission process is reliable and stable. During this process, cameras 657 are distributed on both sides of the laser cutting head 656, which can collect images of the inner wall of the pipe before and after laser cutting, and transmit the image information to the background visual recognition system. The flatness of the inner wall surface of the pipe can be judged by the image before cutting, and the pipe cut can be recorded by the image after cutting, which is beneficial for the analysis and control of the entire laser cutting process.

[0047] like Figure 9 and Figure 11 As shown, the connecting seat 63 has a rotating cavity 631 inside, and a turntable 671 is rotatably installed inside the rotating cavity 631. A dual-axis motor 67 is fixedly installed inside the central column 61. The two output ends of the dual-axis motor 67 are fixedly connected to the corresponding turntable 671. Inclined grooves 672 are evenly arranged through the turntable 671.

[0048] Furthermore, a radial groove 632 is provided on the side wall of the connecting seat 63. The radial groove 632 is connected to the rotating cavity 631. A sliding plate 661 is slidably installed in the radial groove 632. The sliding plate 661 is fixedly connected to the rotating bracket 66. A pin 662 is fixedly provided at the end of the sliding plate 661 facing the turntable 671. The pin 662 is adapted to be slidably installed in the corresponding inclined groove 672.

[0049] Specifically, the dual-axis motor 67 starts, driving the turntables 671 at both ends to rotate simultaneously. Utilizing the sliding cooperation between the pin 662 and the inclined groove 672, the turntable 671 will push the slide plate 661 along the radial groove 632 through the pin 662 when rotating, thereby controlling all rotating supports 66 to open outward or retract inward synchronously, which is convenient for cross support positioning of pipes of different diameters and has strong adaptability.

[0050] like Figure 3 As shown, the clamping mechanism 2 includes a support frame 21 and a scissor bracket 22. A slide rail 211 is fixedly installed on the upper end of the support frame 21, and a pair of slide blocks 212 are slidably installed on the slide rail 211. The bottom ends of the scissor brackets 22 are rotatably engaged with the corresponding slide blocks 212. A bidirectional screw 213 is rotatably installed inside the support frame 21. Adjacent bidirectional screws 213 are connected by a transmission belt 214. A clamping motor 23 is fixedly installed on the outer wall of one of the support frames 21. The output end of the clamping motor 23 is connected to the bidirectional screw 213. The two threaded parts on the bidirectional screw 213 are threadedly engaged with the scissor brackets 22. A clamping airbag 221 is fixedly installed inside the scissor brackets 22. A synchronous shaft 222 is transversely connected between all the scissor brackets 22.

[0051] Specifically, by setting up the clamping mechanism 2, the clamping motor 23 drives the scissor bracket 22 to open or close around the synchronous shaft 222 via the bidirectional screw 213, thereby providing limiting support for pipes of different diameters. When the pipe is placed, the scissor bracket 22 will close inward until the clamping airbag 221 is tightly pressed against the pipe. The clamping airbag 221 can effectively increase the contact area with the surface of the pipe to ensure the firmness of the pipe clamping.

[0052] like Figure 4 As shown, the supporting and fixing mechanism 4 includes a lifting seat 41, which is slidably installed in the movable frame 3. A height adjustment screw 31 is rotatably installed in the movable frame 3, and the height adjustment screw 31 is threaded through the lifting seat 41. A guide rod 32 is fixedly installed in the movable frame 3, and the guide rod 32 slides through the lifting seat 41.

[0053] Specifically, by rotating the height adjustment screw 31, the lifting seat 41 can slide up and down along the guide rod 32, thereby adjusting the height position of the lifting seat 41 so that the support and fixing mechanism 4 can remain concentric with the pipe.

[0054] like Figure 5 , Figure 7 and Figure 11 As shown, the lifting seat 41 has an extension column 42 fixedly extended at one end facing the pipe, and an installation seat 43 is fixedly installed at the end of the extension column 42. A positioning hole 431 is provided through the surface of the installation seat 43, and a positioning rod 641 is fixedly installed on the surface of the end cover 64. The positioning rod 641 and the positioning hole 431 are respectively provided.

[0055] Specifically, in the initial state, the positioning rod 641 is inserted into the positioning hole 431 on one of the end caps 64. At this time, the rotary pipe cutting mechanism 6 is installed on the end cap 64, and simultaneously, the rotary pipe cutting mechanism 6 extends into one end of the pipe along with the support and fixing mechanism 4. After the support and fixing mechanism 4 opens to position and support the pipe, the rotating bracket 66 begins to open outward to achieve cross-support positioning, and then uses the traveling wheels 663 to achieve the movement process. After the cutting is completed, the rotary pipe cutting mechanism 6 moves to the other end cap 64, the positioning rod 641 is inserted into the positioning hole 431 again, and at the same time, the rotating bracket 66 retracts inward. The rotary pipe cutting mechanism 6 will then withdraw from the pipe along with the support and fixing mechanism 4, thereby realizing the rapid positioning and installation process of the rotary pipe cutting mechanism 6.

[0056] like Figure 5 and Figure 6As shown, a sliding groove 421 is provided on the surface of the extension column 42 along the axial direction, and a movable cavity 423 is provided inside the extension column 42. A limiting groove 422 communicating with the movable cavity 423 is provided through the bottom of the sliding groove 421. A sliding sleeve 44 is slidably installed in the movable cavity 423. A sliding block 442 is fixedly connected to the outer wall of the sliding sleeve 44 by a limiting block 441. The sliding block 442 is slidably installed in the sliding groove 421, and the limiting block 441 is slidably installed in the limiting groove 422. A support motor 411 is fixedly installed on the side wall of the lifting seat 41. A support screw 412 is connected to the output end of the support motor 411. The support screw 412 extends into the movable cavity 423 and is threadedly engaged with the sliding sleeve 44.

[0057] Furthermore, the top end of the sliding block 442 is rotatably engaged with one end of the connecting rod 443, the other end of the connecting rod 443 is rotatably engaged with the support rod 444, the bottom end of the support rod 444 is rotatably mounted on the extension column 42, and a rotating seat is rotatably mounted on the top end of the support rod 444. A rubber pad 445 is fixedly installed on the rotating seat, and the rubber pad 445 is set perpendicular to the inner wall of the pipe.

[0058] Specifically, by setting up a support and fixing mechanism 4, when the extension column 42 is coaxially inserted into the inside of the pipe, the support motor 411 drives the support screw 412 to rotate. The support screw 412 drives the sliding sleeve 44 to move linearly. The sliding sleeve 44 will drive the support rod 444 to change angle through the sliding block 442 and the connecting rod 443 until the support rod 444 gradually opens up and makes the rubber pad 445 abut against the inner wall of the pipe, thereby supporting and limiting the two ends of the pipe, so that the pipe is fixed during the laser cutting process, improving the stability of the laser cutting process.

[0059] The working principle of this invention is as follows: Figures 1-11As shown, in use, the pipe is first placed on the upper end of the clamping mechanism 2. The clamping motor 23 drives the scissor bracket 22 to open or close around the synchronous shaft 222 via the bidirectional screw 213 until the clamping airbag 221 is tightly pressed against the pipe. The clamping airbag 221 can effectively increase the contact area with the pipe surface to ensure the firmness of the pipe clamping. The horizontal cylinder 5 pushes the moving frame 3 at both ends to gradually approach the two ends of the pipe. At the same time, the height of the support fixing mechanism 4 is adjusted to keep it concentric with the pipe. Then, the support fixing mechanism 4 is inserted into the pipe. The support motor 411 drives the support screw 412 to rotate. The support screw 412 drives the sliding sleeve 44 to move linearly. The sliding sleeve 44 will drive the support rod 444 to change angle through the sliding block 442 and the connecting rod 443 until the support rod 444 gradually opens and the rubber pad 445 abuts against the inner wall of the pipe, thereby supporting and limiting the two ends of the pipe. The dual-axis motor 67 starts, driving the turntables 671 at both ends to rotate simultaneously. Utilizing the sliding engagement between the pin 662 and the inclined groove 672, the turntable 671, as it rotates, pushes the slide plate 661 along the radial groove 632 via the pin 662, thereby controlling all rotating supports 66 to open outwards synchronously, forming a stable cross-support structure. When the travel motor 664 drives the travel wheel 663 to rotate, the travel wheel 663 will drive the central column 61 and the crawling cutting assembly 65 to move linearly along the pipe axis until the crawling cutting assembly 65 moves to the preset cutting position. The crawling motor 654 starts, driving the crawling gear 655 to rotate. Utilizing the meshing of the crawling gear 655 and the tooth groove 623, the upper bracket 651 and lower bracket 653 as a whole crawl circumferentially along the ring frame 62, using the laser cutting head 656 to perform a laser cutting process on the pipe from the inside out.

[0060] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A laser pipe cutting machine for processing large-diameter pipes, comprising a base (1), characterized in that, Multiple clamping mechanisms (2) are equally spaced on the base (1). The pipe is placed on the upper end of the clamping mechanism (2). A movable frame (3) is slidably installed at both ends of the base (1). A transverse cylinder (5) is fixedly installed at both ends of the base (1). The output end of the transverse cylinder (5) is fixedly connected to the movable frame (3). Each movable frame (3) is provided with a support fixing mechanism (4) for supporting the end of the pipe. A rotating pipe cutting mechanism (6) that travels along the pipe axis is provided between the two sets of support fixing mechanisms (4). The rotary pipe cutting mechanism (6) includes a central column (61), with ring frames (62) fixedly connected to both ends of the central column (61) via connecting plates. A crawling cutting assembly (65) is installed between the two ring frames (62) for limiting. Connecting seats (63) are fixedly provided at both ends of the central column (61) extending outward along the axis. End caps (64) are fixedly provided on the side wall of the connecting seats (63). Rotary brackets (66) are radially slidably installed inside the connecting seats (63). The rotating brackets (66) are arranged in a cross shape. Each rotating bracket (66) has a rotatably mounted wheel (663) at its end. The wheel (663) abuts against the inner wall of the pipe. A walking motor (664) is fixedly provided on the side wall of the bottom rotating bracket (66). The output end of the walking motor (664) is connected to the walking wheel (663). The crawling cutting assembly (65) includes an upper bracket (651), and a lower bracket (653) is fixedly connected to the bottom of the upper bracket (651) through a limiting plate (652). Two annular frames (62) are spaced apart to form a limiting track (622). The limiting plate (652) is adapted to slide and install in the limiting track (622). A laser cutting head (656) is fixedly installed in the center of the upper bracket (651). The laser cutting head (656) crawls along the annular frame (62) to perform laser cutting on the inner wall of the pipe. The outer wall of the ring frame (62) is provided with an outer ring groove (621), the upper bracket (651) is adapted to slide in the outer ring groove (621), the outer wall of the central column (61) is provided with an inner ring groove (611), and the lower bracket (653) is adapted to slide in the inner ring groove (611). A camera (657) is fixedly installed inside the upper bracket (651). The camera (657) is located on both sides of the laser cutting head (656). A crawling gear (655) is rotatably installed inside the lower bracket (653). A crawling motor (654) is fixedly installed on the side wall of the lower bracket (653). The output end of the crawling motor (654) is connected to the crawling gear (655). A toothed groove (623) is provided circumferentially on the inner wall of the ring frame (62). The crawling gear (655) meshes with the toothed groove (623). The connecting seat (63) is provided with a rotating cavity (631), and a turntable (671) is rotatably installed in the rotating cavity (631). A dual-axis motor (67) is fixedly installed inside the central column (61). The two output ends of the dual-axis motor (67) are respectively fixedly connected to the corresponding turntable (671). Inclined grooves (672) are evenly provided on the turntable (671). A radial groove (632) is provided on the side wall of the connecting seat (63). The radial groove (632) is connected to the rotating cavity (631). A sliding plate (661) is slidably installed in the radial groove (632). The sliding plate (661) is fixedly connected to the rotating bracket (66). A pin (662) is fixedly provided at one end of the sliding plate (661) facing the turntable (671). The pin (662) is adapted to be slidably installed in the corresponding inclined groove (672).

2. The laser pipe cutting machine for processing large-diameter pipes according to claim 1, characterized in that, The clamping mechanism (2) includes a support frame (21) and a scissor bracket (22). A slide rail (211) is fixedly installed on the upper end of the support frame (211). A pair of slide seats (212) are slidably installed on the slide rail (211). The bottom end of the scissor bracket (22) is rotatably engaged with the corresponding slide seat (212). A bidirectional screw (213) is rotatably installed inside the support frame (21). Adjacent bidirectional screws (213) are connected by a transmission belt (214). A clamping motor (23) is fixedly installed on the outer wall of one of the support frames (21). The output end of the clamping motor (23) is connected to the bidirectional screw (213). The two threaded parts on the bidirectional screw (213) are threadedly engaged with the scissor bracket (22). A clamping airbag (221) is fixedly installed inside the scissor bracket (22). A synchronous shaft (222) is transversely connected between all the scissor brackets (22).

3. A laser pipe cutting machine for processing large-diameter pipes according to claim 1, characterized in that, The supporting and fixing mechanism (4) includes a lifting seat (41), which is slidably installed in the movable frame (3). A height adjustment screw (31) is rotatably installed in the movable frame (3). The height adjustment screw (31) is threaded through the lifting seat (41). A guide rod (32) is fixedly installed in the movable frame (3). The guide rod (32) slides through the lifting seat (41).

4. A laser pipe cutting machine for processing large-diameter pipes according to claim 3, characterized in that, The lifting seat (41) is fixedly extended with an extension column (42) at one end facing the pipe. The end of the extension column (42) is fixedly provided with a mounting seat (43). The surface of the mounting seat (43) is provided with a positioning hole (431). The surface of the end cap (64) is fixedly provided with a positioning rod (641). The positioning rod (641) and the positioning hole (431) are provided in a one-to-one correspondence.

5. A laser pipe cutting machine for processing large-diameter pipes according to claim 4, characterized in that, The extension column (42) has a sliding groove (421) along the axial direction on its surface. The extension column (42) has a movable cavity (423) inside. The bottom of the sliding groove (421) has a limiting groove (422) that communicates with the movable cavity (423). A sliding sleeve (44) is slidably installed in the movable cavity (423). A sliding block (442) is fixedly connected to the outer wall of the sliding sleeve (44) by a limiting block (441). The sliding block (442) is slidably installed in the sliding groove (421). The limiting block (441) is slidably installed in the limiting groove (422). A support motor (411) is fixedly installed on the side wall of the lifting seat (41). A support screw (412) is connected to the output end of the support motor (411). The support screw (412) extends into the movable cavity (423) and is threadedly connected to the sliding sleeve (44).

6. A laser pipe cutting machine for processing large-diameter pipes according to claim 5, characterized in that, The top end of the sliding block (442) is rotatably engaged with one end of the connecting rod (443), the other end of the connecting rod (443) is rotatably engaged with the support rod (444), the bottom end of the support rod (444) is rotatably mounted on the extension column (42), the top end of the support rod (444) is rotatably mounted with a rotating seat, and a rubber pad (445) is fixedly mounted on the rotating seat. The rubber pad (445) is set perpendicular to the inner wall of the pipe.

Images