A pipe fitting automatic welding line

Abstract

The present application relates to the technical field of pipe welding, and in particular to an automatic pipe welding production line, including a feeding device, a taking device and a welding device, wherein the feeding device includes an annular conveying platform, the annular conveying platform is used to convey pipes, the taking device is used to take the pipes from the feeding device and place them at the welding device, and the welding device is used to weld the pipes. The present application has the advantages of being able to automatically transport and automatically weld pipes, and effectively improves production efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of pipe welding, and in particular to an automatic pipe welding line. Background Art

[0002] Shipbuilding involves welding operations for large quantities of pipe fittings. Currently, when welding pipe fittings, most of them are pre-welded at a single point, and then the pipes are manually transported and welded one by one. The work efficiency is low, the degree of intelligence is not high, and it is not suitable for batch processing of pipes. Summary of the invention

[0003] In order to improve the problem of low efficiency in pipe handling and welding mentioned in the above background technology, the present application provides an automatic pipe welding production line.

[0004] The present application provides a pipe fitting automatic welding production line adopting the following technical solutions:

[0005] A pipe automatic welding production line includes a feeding device, a taking device and a welding device. The feeding device includes an annular conveying table, which is used to convey pipes. The taking device is used to take the pipes from the feeding device and place them at the welding device. The welding device is used to weld the pipes.

[0006] Preferably, the annular conveying platform includes two conveying seats and two supporting seats, the two conveying seats are arranged in parallel, and the two ends of the two supporting seats in the length direction are respectively connected to the ends of the two conveying seats; a number of transition platforms for placing pipe fittings are evenly arranged on the two conveying seats, and the transition platforms are slidably installed on the conveying seats, and the two conveying seats are respectively provided with driving devices for driving the transition platforms to move in the length direction of the conveying seats; and a transverse movement platform for transferring the transition platform on one of the conveying seats to the other conveying seat is provided on the two supporting seats.

[0007] Preferably, the driving device comprises a synchronous driving structure, and the synchronous driving structure comprises

[0008] A guide rail 1, wherein the guide rail 1 is fixed on the conveying seat;

[0009] A plurality of synchronous push rods, wherein the plurality of synchronous push rods are coaxially arranged, a side guide seat 1 is arranged between two adjacent synchronous push rods, and the side guide seat 1 is slidably mounted on a guide rail 1; bases for mounting the synchronous push rods are respectively arranged at both ends of the length direction of the side guide seat 1, and the synchronous push rods are rotatably mounted on the bases, and a plurality of side guide seats 2 are rotatably sleeved on the synchronous push rods, and the side guide seats 2 are slidably mounted on the guide rail 1;

[0010] A plurality of push head mechanisms, wherein the push head mechanisms are used to be clamped on the transition platform and are fixed on the synchronous push rod;

[0011] A plurality of driving cylinders, wherein the plurality of driving cylinders are used to respectively drive each synchronous push rod to rotate around the axis direction of the synchronous push rod, so that the push head mechanism on the synchronous push rod is stuck on the transition platform or detached from the transition platform;

[0012] A power mechanism is used to drive the side guide seat 1 to move back and forth along the length direction of the conveying seat, and the single movement distance of the side guide seat 1 is consistent with the distance between two adjacent transition platforms.

[0013] Preferably, the push head mechanism includes a push head and a locking plate, and the push head and the locking plate are riveted to the synchronous push rod by bolts. A cam follower is rotatably provided at one end of the push head away from the locking plate, and a clamping plate is fixed on the transition platform, and a U-shaped groove is provided on the clamping plate for the cam follower to be clamped into.

[0014] Preferably, the power mechanism includes a servo motor and a push screw, the servo motor is fixed on a conveying seat, a screw seat is fixed on the conveying seat, one end of the push screw in the length direction is fixedly connected to the driving shaft of the servo motor, and the other end is rotatably connected to the screw seat; a ball screw nut is threadedly connected to the push screw, a nut bracket is fixed to the outside of the ball screw nut, and the nut bracket is fixedly connected to one of the side guide seats; a guide rail is provided on the side wall of the conveying seat, and a side guide seat connected to the nut bracket is slidably connected to the guide rail.

[0015] Preferably, the transverse platform includes a transverse guide rail and a transverse pushing device for driving the transverse guide rail to reciprocate between the two conveying seats. The position of the transverse guide rail is changed by the transverse pushing device so that the length direction of the transverse guide rail is kept consistent with the length direction of the two conveying seats back and forth, and the end of the transverse guide rail can be connected to the end of the conveying seat. The transition platform can be moved from the conveying seat to the transverse guide rail under the drive of the driving device, and then moved from the transverse guide rail to another conveying seat.

[0016] Preferably, the transverse pushing device includes a material moving screw, which is rotatably mounted on a support seat, guide rails three are arranged on both sides of the material moving screw, and slides are slidably arranged on the two guide rails three, and the slides are fixedly connected to the transverse guide rails, and a ball screw nut two is threadedly arranged on the material moving screw, and a nut bracket two is connected to the outer side of the ball screw thread two, and the nut bracket two is fixedly connected to the slide; a servo motor two for driving the material moving screw to rotate is installed on the support seat.

[0017] Preferably, the transition platform includes a base plate and a support plate, the base plate and the support plate are connected by a supporting plate, lever arms are slidably provided at both ends of the length direction of the support plate, and a V-shaped block for clamping the pipe fittings is provided on the side where the two lever arms are close to each other; and anti-tilt columns for inserting pipe fittings are vertically provided on the support plate.

[0018] Preferably, a synchronous central axis is provided on one side of the support plate close to the bottom plate, a rotating sleeve is rotatably sleeved on the outer side of the synchronous central axis, and two synchronous arms are provided on the outer side wall of the rotating sleeve, and a synchronous connecting sleeve is rotatably provided on the ends of the two synchronous arms away from the rotating sleeve, and the ends of the two synchronous connecting sleeves away from the synchronous arm are rotatably connected to the two driving arms respectively; a synchronous sliding block is fixed on the driving arm, a slider 1 is provided on the synchronous sliding block, and a guide rail 4 for sliding the slider 1 is installed on the support plate; a spring mount is fixed on the outer side wall of the synchronous sliding block, a tension spring is fixed on the spring mount, and the tension spring is fixedly connected to the support plate at one end away from the spring mount.

[0019] Preferably, the slide plate is provided with a pushing device for pushing one of the push arms to move, the pushing device includes a pushing cylinder, a push head and a push head seat, the pushing cylinder is fixed on the slide plate, the push head seat is fixed on the piston rod of the pushing cylinder, and at the same time, the push head seat is slidably connected to the slide plate, the push head is fixed on the push head seat, and a push rod is provided on one of the push arms, and the push head is driven by the pushing cylinder to move and abut against the push rod and drive the push rod to move, thereby driving the push arm to move, and the push arm drives the V-shaped block to move, so that the two V-shaped blocks move away from each other.

[0020] To summarize, the present application includes at least one of the following beneficial technical effects: the present application can automatically transmit, automatically pick up materials and automatically weld pipe fittings, with a high degree of automation, high operating efficiency, and a large amount of manpower saved. Moreover, automatic welding can ensure welding quality, reduce subsequent rework, and save materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an automatic pipe welding line in an embodiment of the present application.

[0022] Figure 2 It is a schematic diagram of the structure of the annular conveyor platform in an embodiment of the present application.

[0023] Figure 3 yes Figure 2 Enlarged view of part A.

[0024] Figure 4 It is a disassembly schematic diagram used to reflect the power structure in the embodiment of the present application.

[0025] Figure 5It is a disassembly diagram for illustrating the transverse shifting platform in the embodiment of the present application.

[0026] Figure 6 It is a disassembly diagram for illustrating the transverse shifting platform in the embodiment of the present application.

[0027] Figure 7 It is a disassembly schematic diagram used to illustrate the transition platform in the embodiment of the present application.

[0028] Figure 8 It is a disassembly schematic diagram used to illustrate the top opening device in the embodiment of the present application.

[0029] Description of the accompanying drawings: 1. Feeding device; 2. Retrieving device; 3. Welding device; 4. Annular conveying platform; 41. Conveying seat; 411. Conveying guide rail; 42. Support seat; 5. Driving device; 51. Synchronous pushing structure; 511. Guide rail 1; 512. Synchronous push rod; 5121. Side guide seat 1; 51211. Guide rail 2; 5122. Base; 5123. Side guide seat 2; 513. Push head mechanism; 5131. Push head; 5132. Lock plate; 5133. Cam follower; 514. Driving cylinder; 515. Power mechanism; 5151. Servo motor 1; 5152. Pushing screw; 51521. Screw seat; 51522. Ball screw nut 1; 51523. Nut bracket 1; 6. Transverse platform; 61. Transverse guide Rail; 62, transverse material pushing device; 621, material moving screw; 6211, servo motor 2; 622, guide rail 3; 623, slide plate; 624, ball screw nut 2; 625, nut bracket 2; 7, transition table; 71, bottom plate; 72, support plate; 721, lever arm; 7211, synchronous sliding block; 72111, spring hanger; 72112, tension spring; 7212, slider 1; 7213, guide rail 4; 7214, push rod; 722, V-block; 723, anti-tilt column; 724, synchronous central axis; 7241, rotating sleeve; 7242, synchronous arm; 7243, synchronous connecting sleeve; 73, support plate; 8, top opening device; 81, top opening cylinder; 82, lever head; 83, lever head seat; 9, clamping plate; 91, U-shaped groove. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-8 This application is described in further detail.

[0031] The present application embodiment discloses an automatic pipe welding production line. Figure 1 and Figure 2, an automatic pipe welding production line, including a feeding device 1, a taking device 2 and a welding device 3, the feeding device 1 includes an annular conveying table 4, the annular conveying table 4 is used to convey pipes, and the pipes can move in the circumferential direction of the annular conveying table 4, the taking device 2 is a manipulator, the manipulator takes the pipes from the feeding device 1 and places them on the welding device 3, the welding device 3 is a welding machine, the welding table machine is used to weld the pipes, and after the welding is completed, the manipulator takes the pipes off. The pipes in this embodiment are as follows Figure 1 As shown in the figure, single-point pre-welding has been performed between the elbow, straight pipe and flange of the pipe fitting.

[0032] Reference Figure 1 and 2 The annular conveying platform 4 includes two conveying seats 41 and two supporting seats 42. The two conveying seats 41 are arranged in parallel, and the two ends of the two supporting seats 42 in the length direction are respectively connected to the ends of the two conveying seats 41; a number of transition platforms 7 for placing pipe fittings are evenly arranged on the two conveying seats 41, and a conveying guide rail 411 is installed on the conveying seat 41. The transition platform 7 is slidably installed on the conveying guide rail 411 of the conveying seat 41. The two conveying seats 41 are respectively provided with a driving device 5 for driving the transition platform 7 to move in the length direction of the conveying seat 41; the two supporting seats 42 are each provided with a transverse moving platform 6 for transferring the transition platform 7 on one of the conveying seats 41 to the other conveying seat 41.

[0033] Reference Figure 3 and 4 The driving device 5 includes a synchronous driving structure 51, and the synchronous driving structure 51 includes a guide rail 511, and the guide rail 511 is fixed on the conveying seat 41;

[0034] A plurality of synchronous push rods 512 are coaxially arranged, a side guide seat 1 5121 is arranged between two adjacent synchronous push rods 512, and the side guide seat 1 5121 is slidably mounted on the guide rail 1 511; bases 5122 for mounting the synchronous push rod 512 are respectively arranged at both ends in the length direction of the side guide seat 1 5121, and the synchronous push rod 512 is rotatably mounted on the base 5122, and a plurality of side guide seats 2 5123 are rotatably sleeved on the synchronous push rod 512, and the side guide seats 2 5123 are slidably mounted on the guide rail 1 511;

[0035] A plurality of push head mechanisms 513, the push head mechanisms 513 are used to be clamped on the transition platform 7, and the push head mechanisms 513 are fixed on the synchronous push rod 512; the push head mechanism 513 includes a push head 5131 and a locking plate 5132, the push head 5131 and the locking plate 5132 are riveted to the synchronous push rod 512 by bolts, and a cam follower 5133 is provided for rotation at one end of the push head 5131 away from the locking plate 5132, and a clamping plate 9 is fixed on the transition platform 7, and a U-shaped groove 91 for the cam follower 5133 to be clamped into is provided on the clamping plate 9;

[0036] A plurality of driving cylinders 514, the piston rods of the driving cylinders 514 are rotatably connected to a connecting arm, and one end of the connecting arm away from the piston rod is rotatably connected to the synchronous push rod 512, so that the plurality of driving cylinders 514 respectively drive each synchronous push rod 512 to rotate around the axis direction of the synchronous push rod 512, so that the push head mechanism 513 on the synchronous push rod 512 is stuck on the transition platform 7 or detached from the transition platform 7;

[0037] The power mechanism 515 is used to drive the side guide seat 5121 to reciprocate along the length direction of the conveying seat 41. The single movement distance of the side guide seat 5121 is consistent with the distance between two adjacent transition tables 7. The power mechanism 515 includes a servo motor 5151 and a push screw 5152. The servo motor 5151 is fixed on the conveying seat 41. The conveying seat 41 is fixed with a screw seat 51521. One end of the push screw 5152 in the length direction is fixedly connected to the servo motor 5151. The driving shaft of 151 has the other end rotatably connected to the screw seat 51521; a ball screw nut 51522 is threadedly connected to the push screw 5152, a nut bracket 51523 is fixed to the outside of the ball screw nut 51522, and the nut bracket 51523 is fixedly connected to one of the side guide seats 5121; a guide rail 2 51211 is provided on the side wall of the conveying seat 41, and the side guide seat 5121 connected to the nut bracket 51523 is slidably connected to the guide rail 2 51211. During operation, the servo motor 1 5151 drives the push screw 5152 to rotate back and forth, and the push screw 5152 drives the side guide seat 1 5121 connected thereto to move back and forth, and the side guide seat 1 5121 drives the other side guide seats 1 5121, side guide seat 2 5123, base 5122 and synchronous push rod 512 connected to each other to move back and forth synchronously in the length direction of the conveying seat 41, and the synchronous push rod 512 drives the push head mechanism 513 to move back and forth in the length direction of the conveying seat 41; at the same time, the driving cylinder 514 drives the synchronous push rod 512 to rotate along the axis of the synchronous push rod 512, and the synchronous push rod 512 drives the push head mechanism 513 to rotate along the axis of the synchronous push rod 512, and when the cam follower 5133 on the push head mechanism 513 is stuck in the U-shaped groove 91, the transition table 7 can move in the length direction of the conveying seat 41 driven by the push head mechanism 513; in this way, the pipe fittings on the transition table 7 are transported through the mutual cooperation of the above-mentioned mechanisms.

[0038] Reference Figure 5 and Figure 6The transverse platform 6 includes a transverse guide rail 61 and a transverse pushing device 62 for driving the transverse guide rail 61 to reciprocate between the two conveying seats 41. The position of the transverse guide rail 61 is changed by the transverse pushing device 62, so that the length direction of the transverse guide rail 61 is kept consistent with the length direction of the two conveying seats 41 back and forth, and the end of the transverse guide rail 61 can be connected with the end of the conveying guide rail 411 on the conveying seat 41. The transition platform 7 can be moved from the conveying seat 41 to the transverse guide rail 61 under the drive of the driving device 5, and then moved from the transverse guide rail 61 to the other conveying seat 41.

[0039] The transverse material pushing device 62 includes a material moving screw 621, which is rotatably mounted on the support seat 42. Guide rails 622 are arranged on both sides of the material moving screw 621. Slide plates 623 are slidably arranged on the two guide rails 622. The slide plates 623 are fixedly connected to the transverse guide rail 61. A ball screw nut 624 is threadedly arranged on the material moving screw 621. A nut bracket 625 is connected to the outer side of the ball screw thread 624. The nut bracket 625 is fixedly connected to the slide plate 623. A servo motor 6211 for driving the material moving screw 621 to rotate is installed on the support seat 42. The servo motor 6211 is driven by the servo motor 621. 6211 drives the material moving screw 621 to rotate, the material moving screw 621 drives the ball screw nut 2 624 to move, the ball screw nut 2 624 drives the nut bracket 2 625 to move, the nut bracket 2 625 drives the slide plate 623 to move, the slide plate 623 drives the transverse guide rail 61 to move, so that the transverse guide rail 61 is connected back and forth with the conveying guide rails 411 on the two conveying seats 41, so that the transition platform 7 supports the seat 42 from one end in the length direction to the other end. When the transition platform 7 is moved, the transition platform 7 starts to move along the length direction of the conveying seat 41 under the drive of the above-mentioned push head mechanism 513.

[0040] Reference Figure 7 The transition platform 7 includes a bottom plate 71 and a support plate 72, the bottom plate 71 and the support plate 72 are connected by a supporting plate 73, and lever arms 721 are slidably provided at both ends of the length direction of the support plate 72, and a V-shaped block 722 for clamping the pipe fitting is provided on the side where the two lever arms 721 are close to each other; an anti-tilt column 723 for inserting the pipe fitting is vertically provided on the support plate 72; and the clamping plate 9 is fixed on the support plate 72.

[0041] Reference Figure 7 and Figure 8, a synchronous central axis 724 is provided on the side of the support plate 72 close to the bottom plate 71, and a rotating sleeve 7241 is rotatably sleeved on the outer side of the synchronous central axis 724, and two synchronous arms 7242 are rotatably provided with a synchronous connecting sleeve 7243 at one end of the two synchronous arms 7242 away from the rotating sleeve 7241, and the two synchronous connecting sleeves 7243 are rotatably connected to the two lever arms 721 at one end away from the synchronous arm 7242; a synchronous sliding block 7211 is fixed on the lever arm 721, and a slider 1 7212 is provided on the synchronous sliding block 7211, and a guide rail 4 7213 for the slider 1 7212 to slide is installed on the support plate 72; a spring hanger 72111 is fixed on the outer wall of the synchronous sliding block 7211, and a tension spring 72112 is fixed on the spring hanger 72111, and the tension spring 72112 is fixed on the support plate 72 at one end away from the spring hanger 72111. The slide plate 623 is provided with a push-up device 8 for pushing one of the push arms 721 to move. The push-up device 8 includes a push-up cylinder 81, a push head 82 and a push head seat 83. The push-up cylinder 81 is fixed on the slide plate 623, and the push head seat 83 is fixed on the piston rod of the push-up cylinder 81. At the same time, the push head seat 83 is slidably connected to the slide plate 623. The slide plate 623 is provided with a connecting plate, and a guide rail 5 84 for the push head seat 83 to slide is installed on the connecting plate. The push head 82 is fixed on the push head seat 83. A push rod 7214 is provided on 721. The push head 82 moves and abuts against the push rod 7214 under the drive of the push cylinder 81 and drives the push rod 7214 to move, thereby driving the push arm 721 to move. The push arm 721 drives the V-shaped block 722 to move, so that the two V-shaped blocks 722 move away from each other. During operation, the staff stands at the end of the conveying seat 41 and places the pipe fittings on the transition platform 7 in turn. During the placement process, the automatic opening and closing of the V-shaped block 722 is realized through the above structure, which is convenient for the staff to operate.

[0042] The implementation principle of an automatic welding of pipe fittings in an embodiment of the present application is as follows: a worker stands at the end of the conveying seat 41, and the dial head 82 moves and abuts against the push rod 7214 under the drive of the push cylinder 81 and drives the push rod 7214 to move, thereby driving the dial arm 721 to move, and the dial arm 721 drives the V-shaped block 722 to move, so that the two V-shaped blocks 722 move away from each other, and the worker places the pipe fitting on the transition platform 7. After the push rod cylinder 81 is retracted, the V-shaped block 722 is retracted under the drive of the tension spring 72112, so that the V-shaped block 722 is clamped on both sides of the pipe fitting; the transition platform 7 with the pipe fitting placed is moved to the end of the other conveying seat 41 under the drive of the transverse moving platform 6, and then the transition platform 7 is driven by the driving device 5 to move on the conveying seat 41, and then the pipe fitting can be moved on the annular conveying platform 4, and the pipe fitting is removed from the feeding device 1 by the manipulator and placed at the welding position for welding.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pipe automatic welding line, characterized by: The invention comprises a feeding device (1), a taking device (2) and a welding device (3), wherein the feeding device (1) comprises an annular conveying platform (4), the annular conveying platform (4) is used to convey pipe fittings, the taking device (2) is used to take the pipe fittings from the feeding device (1) and place them on the welding device (3), and the welding device (3) is used to weld the pipe fittings; the annular conveying platform (4) comprises two conveying seats (41) and two supporting seats (42), the two conveying seats (41) are arranged in parallel, and the two supporting seats (42) are arranged in a longitudinal direction. The two ends are respectively connected to the ends of the two conveying seats (41); a plurality of transition platforms (7) for placing pipe fittings are evenly arranged on the two conveying seats (41), and the transition platforms (7) are slidably mounted on the conveying seats (41); the two conveying seats (41) are respectively provided with driving devices (5) for driving the transition platforms (7) to move in the length direction of the conveying seats (41); the two supporting seats (42) are respectively provided with a transverse moving platform (6) for transferring the transition platform (7) on one of the conveying seats (41) to the other conveying seat (41); The driving device (5) comprises a synchronous driving structure (51), wherein the synchronous driving structure (51) comprises A guide rail (511), wherein the guide rail (511) is fixed on the conveying seat (41); A plurality of synchronous push rods (512), wherein the plurality of synchronous push rods (512) are coaxially arranged, and a side guide seat (5121) is arranged between two adjacent synchronous push rods (512), and the side guide seat (5121) is slidably mounted on the guide rail (511); bases (5122) for mounting the synchronous push rod (512) are respectively arranged at both ends in the length direction of the side guide seat (5121), and the synchronous push rod (512) is rotatably mounted on the base (5122), and a plurality of side guide seats (5123) are rotatably sleeved on the synchronous push rod (512), and the side guide seats (5123) are slidably mounted on the guide rail (511); A plurality of push head mechanisms (513), wherein the push head mechanisms (513) are used to be clamped on the transition platform (7), and the push head mechanisms (513) are fixed on the synchronous push rod (512); A plurality of driving cylinders (514), wherein the plurality of driving cylinders (514) are used to respectively drive each synchronous push rod (512) to rotate around the axis direction of the synchronous push rod (512), so that the push head mechanism (513) on the synchronous push rod (512) is stuck on the transition platform (7) or detached from the transition platform (7); A power mechanism (515), the power mechanism (515) is used to drive the side guide seat 1 (5121) to move back and forth along the length direction of the conveying seat (41), and the single movement distance of the side guide seat 1 (5121) is consistent with the distance between two adjacent transition platforms (7); The transverse platform (6) comprises a transverse guide rail (61) and a transverse pushing device (62) for driving the transverse guide rail (61) to reciprocate between the two conveying seats (41). The transverse pushing device (62) changes the position of the transverse guide rail (61) so that the length direction of the transverse guide rail (61) is respectively consistent with the length direction of the two conveying seats (41), and the end of the transverse guide rail (61) can be connected to the end of the conveying seat (41). The transition platform (7) can be driven by the driving device (5) to move from the conveying seat (41) to the transverse guide rail (61), and then move from the transverse guide rail (61) to the other conveying seat (41); The transition platform (7) comprises a bottom plate (71) and a support plate (72), wherein the bottom plate (71) and the support plate (72) are connected via a support plate (73), and lever arms (721) are slidably provided at both ends of the length direction of the support plate (72), and a V-shaped block (722) for clamping a pipe fitting is provided on the side where the two lever arms (721) are close to each other; an anti-tilt column (723) for inserting a pipe fitting is vertically provided on the support plate (72); The push head mechanism (513) comprises a push head (5131) and a locking plate (5132), wherein the push head (5131) and the locking plate (5132) are riveted to the synchronous push rod (512) by bolts, and a cam follower (5133) is rotatably arranged at one end of the push head (5131) away from the locking plate (5132), and a clamping plate (9) is fixed on the transition platform (7), and a U-shaped groove (91) is provided on the clamping plate (9) for the cam follower (5133) to be clamped into; The power mechanism (515) comprises a servo motor (5151) and a push screw (5152); the servo motor (5151) is fixed on a conveying seat (41); a screw seat (51521) is fixed on the conveying seat (41); one end of the push screw (5152) in the length direction is fixedly connected to the driving shaft of the servo motor (5151), and the other end is rotatably connected to the screw seat (51521); A ball screw nut (51522) is threadedly connected, a nut bracket (51523) is fixed to the outside of the ball screw nut (51522), and the nut bracket (51523) is fixedly connected to one of the side guide seats (5121); a guide rail (51211) is arranged on the side wall of the conveying seat (41), and the side guide seat (5121) connected to the nut bracket (51523) is slidably connected to the guide rail (51211); The transverse material pushing device (62) comprises a material moving screw (621), the material moving screw (621) is rotatably mounted on a support seat (42), two guide rails (622) are arranged on both sides of the material moving screw (621), a slide plate (623) is slidably arranged on the two guide rails (622), the slide plate (623) is fixedly connected to the transverse guide rail (61), a ball screw nut (624) is threadedly arranged on the material moving screw (621), a nut bracket (625) is connected to the outer side of the ball screw nut (624), and the nut bracket (625) is fixedly connected to the slide plate (623); a servo motor (6211) for driving the material moving screw (621) to rotate is installed on the support seat (42); A synchronous central axis (724) is arranged on one side of the support plate (72) close to the bottom plate (71); a rotating sleeve (7241) is rotatably sleeved on the outer side of the synchronous central axis (724); two synchronous arms (7242) are rotatably sleeved on the outer side wall of the rotating sleeve (7241); a synchronous connecting sleeve (7243) is rotatably arranged on one end of the two synchronous arms (7242) away from the rotating sleeve (7241); and the two synchronous connecting sleeves (7243) are rotatably connected to the two driving arms (721) at one end away from the synchronous arms (7242); A synchronous sliding block (7211) is fixed on the lever arm (721), a sliding block (7212) is arranged on the synchronous sliding block (7211), and a guide rail (7213) for sliding the sliding block (7212) is installed on the support plate (72); a spring hanger (72111) is fixed on the outer wall of the synchronous sliding block (7211), a tension spring (72112) is fixed on the spring hanger (72111), and one end of the tension spring (72112) away from the spring hanger (72111) is fixedly connected to the support plate (72).

2. The automatic pipe welding line according to claim 1 is characterized in that: The slide plate (623) is provided with a push-opening device (8) for pushing one of the push arms (721) to move. The push-opening device (8) comprises a push-opening cylinder (81), a push head (82) and a push head seat (83). The push-opening cylinder (81) is fixed on the slide plate (623), and the push head seat (83) is fixed on the piston rod of the push-opening cylinder (81). At the same time, the push head seat (83) is slidably connected to the slide plate (623), and the push head (82) is fixed on the push head seat (83). One of the push arms (721) is provided with a push rod (7214). Driven by the push-opening cylinder (81), the push head (82) moves to abut against the push rod (7214) and drives the push rod (7214) to move, thereby driving the push arm (721) to move. The push arm (721) drives the V-shaped block (722) to move, so that the two V-shaped blocks (722) move away from each other.

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