Automatic continuous welding machine and continuous welding method thereof

Abstract

The invention relates to the technical field of automatic welding, and discloses an automatic continuous welding machine and a continuous welding method thereof.The automatic continuous welding machine comprises a welding part, clamping parts are arranged on the two sides of the welding part correspondingly and used for fixing a steel pipe, and positioning parts are arranged on the outer sides of the two clamping parts correspondingly and used for guiding the steel pipe; the outer sides of the two positioning parts are each provided with a feeding part used for conveying steel pipes, the bottoms of the clamping parts and the bottoms of the positioning parts are each provided with a driving part used for controlling the clamping parts and adjusting the positioning parts, the steel pipes are clamped and fixed through the clamping parts, the stability of the steel pipes in the welding process is guaranteed, surrounding type welding is matched, and the welding efficiency is improved. The welding gun surrounds the outer ring of the steel pipe to weld the steel pipe, the steel pipe in movable welding is avoided, the problem that the steel pipe is prone to dislocation during operation of an existing automatic steel pipe welding machine is solved, and the stability and accuracy of steel pipe welding are further improved.

Description

Technical Field

[0001] This invention application relates to the field of automated welding technology, specifically to automated continuous welding machines and their continuous welding methods. Background Technology

[0002] Seamless steel pipes are widely used in industrial pipelines as the main tool for transporting fluid media such as oil, natural gas, and coal gas. The main welding methods for steel pipes include manual electric arc welding, submerged arc welding, gas shielded welding, high frequency resistance welding, and spiral welding. The specific choice depends on the material of the steel pipe, its use, and process requirements. Seamless steel pipes are formed by heating the edge of the weld with high frequency current and extruding it.

[0003] In current seamless steel pipe automatic welding machines, the conveying equipment transports the steel pipe to the welding gun position. The steel pipe is rotated by the conveying equipment to weld the joint between the two steel pipes. When controlling the rotation of the steel pipe, it is necessary not only to stabilize the rotation speed, but also to ensure that the joint of the steel pipe is stably aligned. However, since the steel pipe has a certain length, controlling the rotation only at the welding end is not stable and can easily lead to misalignment at the joint of the two steel pipes. Controlling the rotation of the entire steel pipe is also quite laborious. Summary of the Invention

[0004] To address the problems of easy misalignment of steel pipes and laborious loading and unloading of steel pipes during operation of automated steel pipe welding machines, this invention provides an automated continuous welding machine and its continuous welding method to solve the aforementioned problems.

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

[0006] An automated continuous welding machine includes a welding section, with clamping sections on both sides of the welding section for fixing steel pipes, positioning sections on the outer sides of the two clamping sections for guiding the steel pipes, and feeding sections on the outer sides of the two positioning sections for conveying the steel pipes. A driving section is provided at the bottom of each clamping section and positioning section for controlling the clamping section and adjusting the positioning section.

[0007] The welding unit includes a welding turntable, a support plate, a servo cylinder, a fixed base, and a base. The welding turntable is rotatably mounted on the top of the base. A support plate is fixed to one side of the welding turntable by bolts. A servo cylinder is fixedly mounted on the support plate. A fixed base is fixed to the output end of the servo cylinder for mounting the welding torch.

[0008] Furthermore, the welding part also includes a limiting shaft, a limiting frame, and a fixing rod. The limiting shafts are rotatably fitted on both sides of the welding turntable, and each limiting shaft is rotatably sleeved inside the limiting frame. The inner sidewall of each limiting frame is slidably fitted with the welding turntable.

[0009] Further, the clamping part comprises fixed clamping rollers, clamping roller sleeve frames and connecting frames one, the fixed clamping rollers are symmetrically arranged on both sides of the welding turntable, the clamping roller sleeve frames are fixed on the outer sides of the fixed clamping rollers, and the connecting frames one are fixed on the outer sides of the clamping roller sleeve frames.

[0010] Further, the positioning part comprises guide rollers, supporting plates and connecting frames two, the guide rollers are symmetrically arranged on the outer sides of the welding part away from the welding part, the supporting plates are rotatably connected between the guide rollers, and the connecting frames two are fixed on the outer sides of the guide rollers.

[0011] Further, the welding part further comprises gear one, gear two, servo motor one, belt pulley and belt, the gear one is fixed to the outer surface of the middle part of the welding turntable, the gear two is symmetrically connected to the lower part of the gear one, the gear two is rotatably connected to the inside of the base through the bearing, the belt pulley is fixed to one end of the gear two extending to the outside of the base, the belt pulley is drivingly connected through the belt between the two belt pulleys, the servo motor one is fixedly installed on the outer side of one of the belt pulleys, and the output end of the servo motor one is fixed to the belt pulley.

[0012] Further, the feeding part comprises supporting frames, conveying rollers, chain boxes, servo motor two and servo cylinder two, the supporting frames are arranged on the middle parts of the outer sides of the positioning parts, the conveying rollers are rotatably connected to the inside of the supporting frames, the chain boxes are fixed to one side of the supporting frames, the gears are fixed to one end of the conveying rollers extending to the inside of the chain boxes, the gears are connected through the sprocket, the servo motor two is fixedly installed on the outer side of the chain box, and the output end of the servo motor two is fixed to one of the gears.

[0013] Further, the driving part comprises moving supports, driving tracks, limiting slides, servo motor four and bottom plates, the moving supports are fixed to the outer sides of the connecting frames one and the connecting frames two, the driving tracks are arranged on the middle parts of the bottom surfaces of the moving supports, the servo motor four is fixedly installed on one end of the driving track, the limiting slides are arranged on both sides of the driving track, the moving supports are slidingly connected to the top surfaces of the limiting slides, and the driving tracks and the limiting slides are fixed to the bottom plates.

[0014] Further, the welding turntable is arranged in a hollow I-shaped mode, the wire slot is fixed to the inner edge of the side of the welding turntable close to the supporting plate, the wire slot is in an L-shaped mode, and the thicknesses of the gear two are smaller than the thickness of the gear one.

[0015] Further, the middle lines of the supporting plates and the conveying rollers are in the same horizontal plane as the center of the welding turntable, and the supporting plates and the conveying rollers are arranged in an arc-shaped mode with a recessed middle part.

[0016] Further, an automatic continuous welding method, the automatic continuous welding method comprising the following steps:

[0017] S1: adjusting the welding machine according to the diameter of the steel pipe to be welded;

[0018] S11: welding turntable: adjusting the height of the support frame and the distance between the two groups of support plates on each side according to the diameter of the steel pipe to be welded, when adjusting, the servo cylinder II moves up and down to adjust the height of the conveying roller, so that the center of the steel pipe is aligned with the center of the welding turntable;

[0019] S12: servo motor IV operates to drive the two moving supports to move relatively, thereby adjusting the distance between the two support plates, limiting on both sides of the steel pipe to align the center of the steel pipe, and fixing the welding gun on the fixed seat;

[0020] S2: placing the steel pipe for loading and welding;

[0021] S21: placing the steel pipe to be welded on one side of the support frame, servo motor II operates to move the steel pipe to the welding turntable, in the moving process, the arc design of the conveying roller allows the steel pipe to move along the middle part of the conveying roller, when moving to the position of the support plate, the arc design of the support plate allows the steel pipe to move along the middle part of the support plate, under the synchronous guidance of the support plate and the conveying roller, the center of the steel pipe is aligned with the center of the welding turntable;

[0022] S22: using the fixed clamping roller of S21 to convey two steel pipes to the two sides of the welding turntable respectively, and make the joint of the two steel pipes located below the welding gun, at this time, servo motor IV under the clamping part operates to drive the fixed clamping rollers on both sides to move and clamp the steel pipes;

[0023] S23: when welding, servo motor II stops operating, servo cylinder I operates to drive the welding gun to move downward through the fixed seat, after the welding gun approaches the steel pipe, the welding machine is turned on to weld the joint, when welding, the welding gun moves around the steel pipe, and the welding gun tube moves along the inside of the wire groove;

[0024] S3: after welding, the steel pipe is unloaded;

[0025] S31: after welding, servo motor II operates again to drive the steel pipe after welding to be unloaded, at this time, the steel pipe to be welded is placed on the loading end of the conveying roller, and loading is carried out synchronously, so that welding can be continued;

[0026] S32: the rotation directions of the welding turntables of adjacent two weldings are opposite.

[0027] Compared with the prior art, the beneficial effects of the present application are:

[0028] 1. In this invention, the steel pipe is clamped and fixed by the clamping part, which ensures the stability of the steel pipe during welding. In addition, the circumferential welding allows the welding torch to surround the steel pipe and weld it, avoiding the steel pipe from moving during welding. This solves the problem that the steel pipe is prone to misalignment when the existing automated steel pipe welding machine is running, and further improves the stability and accuracy of steel pipe welding.

[0029] 2. In this invention, by cooperating with the feeding section and the guiding section, the two steel pipes conveyed to the welding section can be aligned on the same straight line under the joint guidance of the conveying roller and the guiding roller during feeding. This ensures that the two steel pipes are aligned and fit together during subsequent welding, solving the problem that the loading and unloading of steel pipes in existing automated steel pipe welding machines is relatively laborious. Automatic alignment during feeding saves welding time.

[0030] 3. In this invention, the welding torch with adjustable welding position, as well as the adjustable conveying part, guiding part and clamping part, can adapt to steel pipes of different sizes during welding, which greatly improves the applicability of the welding machine. Moreover, the continuous conveying structure ensures that the welding machine can perform welding continuously and stably. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of a continuous welding machine according to an embodiment of this application;

[0033] Figure 2 yes Figure 1 The diagram shows a schematic representation of the pipe welding section in the embodiment shown.

[0034] Figure 3 yes Figure 1 Another perspective view of the pipe welding section in the embodiment shown;

[0035] Figure 4 yes Figure 1 The diagram shows the structure of the positioning part in the embodiment shown.

[0036] Figure 5 yes Figure 1 The diagram shows the structure of the clamping part in the embodiment shown.

[0037] Figure 6 yes Figure 1 A schematic diagram of the feeding section structure in the illustrated embodiment.

[0038] The meanings of the reference signs in the drawings are as follows: 1, welding part; 11, welding turntable; 12, supporting plate; 13, servo cylinder I; 14, fixed seat; 15, limiting shaft; 16, limiting frame; 17, fixed rod; 18, gear I; 19, gear II; 120, base; 121, servo motor I; 122, pulley; 123, belt; 124, wire slot; 2, clamping part; 21, fixed clamping roller; 22, clamping roller sleeve frame; 23, connecting frame I; 3, positioning part; 31, guide roller; 32, supporting plate; 33, connecting frame II; 4, feeding part; 41, supporting frame; 42, conveying roller; 43, chain box; 44, servo motor II; 45, servo cylinder II; 5, driving part; 51, moving support; 52, driving track; 53, limiting slide; 54, servo motor IV; 55, bottom plate. DETAILED DESCRIPTION

[0039] To make the application purposes, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the embodiments described below are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0040] Embodiment one:

[0041] With reference to Figures 1-6 , the automatic continuous welding machine and the continuous welding method thereof include a welding part 1, the welding part 1 is provided with a clamping part 2 on each side, which is used for fixing a steel pipe, the outer side of each clamping part 2 is provided with a positioning part 3, which is used for guiding the steel pipe, the outer side of each positioning part 3 is provided with a feeding part 4, which is used for conveying the steel pipe, and the bottom of each clamping part 2 and positioning part 3 is provided with a driving part 5, which is used for controlling the clamping part 2 and adjusting the positioning part 3.

[0042] The welding part 1 includes a welding turntable 11, a supporting plate 12, a servo cylinder I 13, a fixed seat 14, and a base 120, the welding turntable 11 is rotationally arranged on the top of the base 120, the welding turntable 11 is fixed on one side through a bolt and provided with the supporting plate 12, the supporting plate 12 is fixedly loaded with the servo cylinder I 13, and the output end of the servo cylinder I 13 is fixed with the fixed seat 14, which is used for installing a welding gun.

[0043] As an optimization scheme, as Figure 2 and Figure 3As shown, the welding part 1 further comprises a limiting shaft 15, a limiting frame 16 and a fixing rod 17, the welding turntable 11 is rotationally attached to the limiting shaft 15 on both sides, each limiting shaft 15 is rotationally sleeved in the limiting frame 16, the inner wall of each limiting frame 16 is slidably attached to the welding turntable 11, the welding part 1 further comprises a gear one 18, a gear two 19, a servo motor one 121, a pulley 122 and a belt 123, the gear one 18 is fixed on the outer surface of the middle part of the welding turntable 11, the gear two 19 is symmetrically connected to the lower part of the gear one 18, the two gear two 19 are rotationally connected in the inside of the base 120 through bearings, the pulley 122 is fixed on one end of the outside of the base 120 extended by the two gear two 19, the two pulleys 122 are transmissionally connected through the belt 123, the servo motor one 121 is fixed on the outside of one of the pulleys 122, the output end of the servo motor one 121 is fixed on the pulley 122, the welding turntable 11 is set as a hollow I-shaped, the wire slot 124 is fixed on the inner edge of the side of the welding turntable 11 close to the supporting plate 12, the cross section of the wire slot 124 is L-shaped, the thickness of the two gear two 19 is less than the thickness of the gear one 18.

[0044] As a further optimization scheme, as shown in Figure 4 The clamping part 2 comprises a fixed clamp roller 21, a clamp roller sleeve frame 22 and a connecting frame one 23, the welding turntable 11 is symmetrically provided with the fixed clamp roller 21 on both sides, the outer side of each fixed clamp roller 21 is fixed with the clamp roller sleeve frame 22, and the outer side of each two clamp roller sleeve frames 22 is fixed with the connecting frame one 23.

[0045] As a further optimization scheme, as shown in Figure 5 The positioning part 3 comprises a guide roller 31, a supporting plate 32 and a connecting frame two 33, the outer side of each clamp roller sleeve frame 22 is symmetrically provided with the guide roller 31 away from the welding part 1, the outer side of each two guide rollers 31 is fixed with the connecting frame two 33.

[0046] As a further optimization scheme, as shown in Figure 5 The feeding part 4 comprises a supporting frame 41, a conveying roller 42, a chain box 43, a servo motor two 44 and a servo cylinder two 45, the outer side of each two positioning parts 3 is provided with the supporting frame 41, the inside of the supporting frame 41 is equidistantly rotationally connected with a plurality of conveying rollers 42, the outer side of the supporting frame 41 is fixed with the chain box 43, the outer side of each conveying roller 42 is fixed with a gear, a plurality of gears are connected through a sprocket, the outer side of the chain box 43 is fixedly installed with the servo motor two 44, the output end of the servo motor two 44 is fixed on one of the gears, the middle line of the supporting plate 32 and the conveying roller 42 is on the same horizontal plane as the center of the welding turntable 11, and the supporting plate 32 and the conveying roller 42 are both set as an arc shape with a recessed middle part.

[0047] As a further optimization, as shown in Figure 1 , Figure 2 and Figure 4 , the driving part 5 includes a moving bracket 51, a driving track 52, a limiting slide 53, a servo motor four 54, and a bottom plate 55. Each of the outer sides of the first connecting bracket 23 and the second connecting bracket 33 is fixed with the moving bracket 51. The bottom surface of each moving bracket 51 is provided with the driving track 52. The inside of the driving track 52 is rotationally connected with a lead screw. The lead screw is symmetrically screwed with a moving block. The top of the moving block is fixed to the bottom surface of the moving bracket 51. The inside of each moving block is provided with a threaded groove. The threaded directions of the inside of each group of two moving blocks are opposite. The one end of the driving track 52 is fixedly installed with the servo motor four 54. The two sides of the driving track 52 are provided with the limiting slide 53. The inside of each limiting slide 53 is slidably connected with a limiting block. The top surface of the limiting block is fixed to the bottom surface of the moving bracket 51. The bottom of the moving bracket 51 is slidably connected to the top surface of the limiting slide 53. The bottom surface of each group of the driving track 52 and the limiting slide 53 is fixed to the bottom plate 55.

[0048] Example two:

[0049] An automatic continuous welding method, the automatic continuous welding method comprising the following steps:

[0050] S1: adjusting the welding machine according to the diameter of the steel pipe to be welded;

[0051] S11: adjusting the height of the support frame 41 and the distance between the two groups of support plates 32 on each side according to the diameter of the steel pipe to be welded. When adjusting, the servo cylinder two 45 operates to push the support frame 41 to move up and down, so as to adjust the height of the conveying roller 42, so that the center of the steel pipe is aligned with the center of the welding turntable 11;

[0052] S12: the servo motor four 54 operates to drive the two moving brackets 51 to move relatively, so as to adjust the distance between the two support plates 32, limit the two sides of the steel pipe, and make the steel pipe aligned with the center, and then fix and install the welding gun on the fixed seat 14;

[0053] S2: placing the steel pipe for loading and welding;

[0054] S21: placing the steel pipe to be welded on one of the support frames 41. The servo motor two 44 operates to drive the steel pipe to move to the welding turntable 11. In the moving process, the arc-shaped design of the conveying roller 42 enables the steel pipe to move along the middle part of the conveying roller 42. When moving to the position of the support plate 32, the arc-shaped design of the support plate 32 enables the steel pipe to move along the middle part of the support plate 32. Under the synchronous guidance of the support plate 32 and the conveying roller 42, the center of the steel pipe is aligned with the center of the welding turntable 11;

[0055] S22: two steel pipes are respectively transported to the two sides of the welding turntable 11 in the manner of fixing the clamping rollers 21, and the joints of the two steel pipes are located below the welding torch, at this time, the servo motor four 54 below the clamping part 2 operates to drive the two fixed clamping rollers 21 to move and clamp and fix the steel pipes;

[0056] S23: when welding, the servo motor two 44 stops operating, the servo cylinder one 13 operates, the welding torch is driven to move downward through the fixing seat 14, the welding torch is close to the steel pipe, the welding machine is turned on, and the joint is welded, when welding, the welding torch moves around the steel pipe, and the welding torch wire pipe moves along the inside of the wire groove 124;

[0057] S3: after welding, the steel pipe is discharged;

[0058] S31: after welding, the servo motor two 44 operates again to drive the steel pipe after welding to be discharged, at this time, the steel pipe to be welded is placed on the feeding end of the conveying roller 42, and the feeding is synchronized, so that the welding can be continued;

[0059] S32: the welding turntable 11 rotates in the opposite direction for adjacent two times of welding, so that the welding torch wire is prevented from being continuously wound on the wire groove 124, and the welding torch wire is prevented from being wound by repeatedly rotating back and forth.

[0060] It is apparent for those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the foregoing description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the elements of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0061] The foregoing embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the foregoing embodiments of the present application have been described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An automated continuous welder characterized by: The utility model provides a steel pipe welding device, including welding portion (1), welding portion (1) both sides are provided with clamping portion (2) respectively, for fixed steel pipe, two clamping portion (2) outside are provided with positioning portion (3) evenly, for the guide of steel pipe, two positioning portion (3) outside are provided with feeding portion (4) evenly, for steel pipe delivery, every clamping portion (2) and positioning portion (3) bottom are provided with drive portion (5) evenly, for control clamping portion (2) and adjust positioning portion (3); The welding portion (1) includes a welding turntable (11), a supporting plate (12), a servo cylinder (13), a fixed seat (14) and a base (120), the welding turntable (11) is rotatably arranged on the top of the base (120), the welding turntable (11) is fixedly connected with the supporting plate (12) on one side through bolts, the servo cylinder (13) is fixedly arranged on the supporting plate (12), and the output end of the servo cylinder (13) is fixedly connected with the fixed seat (14) for mounting a welding gun.

2. The automated continuous welder of claim 1, wherein: The welding portion (1) further includes a limiting shaft (15), a limiting frame (16) and a fixed rod (17), the limiting shaft (15) is rotatably arranged on the upper and lower sides of the welding turntable (11), the limiting shaft (15) is rotatably sleeved in the limiting frame (16), and the inner side wall of the limiting frame (16) is slidably connected with the welding turntable (11).

3. The automated continuous welder of claim 1, wherein: The clamping portion (2) includes a fixed clamp roller (21), a clamp roller sleeve frame (22) and a connecting frame (23), the fixed clamp roller (21) is symmetrically arranged on the both sides of the welding turntable (11), the clamp roller sleeve frame (22) is fixedly arranged on the outer side of the fixed clamp roller (21), and the connecting frame (23) is fixedly arranged on the outer sides of the two clamp roller sleeve frames (22).

4. The automated continuous welder of claim 3, wherein: The positioning portion (3) includes a guide roller (31), a supporting plate (32) and a connecting frame (33), the guide roller (31) is symmetrically arranged on the both sides of the fixed clamp roller (21) away from the welding portion (1) and around the center of the welding turntable (11), a plurality of supporting plates (32) are equidistantly and rotatably connected between the two guide rollers (31) on each side, and the connecting frame (33) is fixedly arranged on the outer sides of the two guide rollers (31) on each side.

5. The automated continuous welder of claim 1, wherein: The welding portion (1) further includes a gear (18), a gear (19), a servo motor (121), a pulley (122) and a belt (123), the gear (18) is fixedly arranged on the outer surface of the middle of the welding turntable (11), the gear (19) is symmetrically and movably connected with the gear (18), the two gears (19) are rotatably connected in the base (120) through bearings, the pulley (122) is fixedly arranged on one end of the base (120) away from the welding portion (1), the two pulleys (122) are drivingly connected through the belt (123), one of the pulleys (122) is fixedly arranged with the servo motor (121), and the output end of the servo motor (121) is fixedly arranged on the pulley (122).

6. The automated continuous welder of claim 1, wherein: The feeding part (4) comprises a support frame (41), conveying rollers (42), a chain box (43), a servo motor two (44) and a servo cylinder two (45), the support frame (41) is arranged at the middle part outside the two positioning parts (3), a plurality of conveying rollers (42) are rotationally connected inside the support frame (41) at equal intervals, the chain box (43) is fixed on one side of the support frame (41), a gear is fixed on one end of each conveying roller (42) extending into the chain box (43), a plurality of gears are connected through a chain wheel, the servo motor two (44) is fixedly installed outside the chain box (43), and the output end of the servo motor two (44) is fixed on one gear.

7. The automated continuous welder of claim 4, wherein: The driving part (5) comprises a moving support (51), a driving track (52), a limiting slide (53), a servo motor four (54) and a bottom plate (55), the moving support (51) is fixed outside each connecting frame one (23) and connecting frame two (33), the driving track (52) is arranged at the middle part of the bottom surface of each moving support (51), the servo motor four (54) is fixedly installed at one end of the driving track (52), the limiting slide (53) is arranged on the two sides of the driving track (52), the moving support (51) is slidably connected to the top surface of the limiting slide (53), and each group of the driving track (52) and the limiting slide (53) is fixed on the bottom plate (55).

8. The automated continuous welder of claim 5, wherein: The welding rotary table (11) is arranged in a hollow H-shaped type, wire grooves (124) are fixedly arranged on the inner edges of one side of the welding rotary table (11) close to the supporting plate (12), the wire grooves (124) are all L-shaped in section, and the thicknesses of the two gear two (19) are all less than the thickness of the gear one (18).

9. The automated continuous welder of claim 4, wherein: The middle lines of the supporting plates (32) and the conveying rollers (42) are all on the same horizontal plane as the center of the welding rotary table (11), and the supporting plates (32) and the conveying rollers (42) are all arranged in an arc shape with a recessed middle part.

10. An automated continuous welding method derived from the automated continuous welding machine according to any one of claims 1-9, characterized in that: The automatic continuous welding method comprises the following steps: S1: adjusting the welding machine according to the diameter of the steel pipe to be welded; S11: adjusting the height of the support frame (41) and the distance between the two groups of supporting plates (32) on each side according to the diameter of the steel pipe to be welded, when adjusting, the servo cylinder two (45) is operated to drive the support frame (41) to move up and down, so as to adjust the height of the conveying roller (42), so that the center of the steel pipe is aligned with the center of the welding rotary table (11); S12: the servo motor four (54) is operated to drive the two moving supports (51) to move relatively, so as to adjust the distance between the two supporting plates (32), the steel pipe is limited on the two sides, so that the steel pipe is aligned with the center, and the welding gun is fixedly installed on the fixed seat (14); S2: placing the steel pipe for feeding and welding; S21: Place the steel pipe to be welded on one side of the support frame (41), and operate the servo motor two (44) to move the steel pipe to the welding turntable (11). In the moving process, the arc-shaped design of the conveying roller (42) allows the steel pipe to move along the middle part of the conveying roller (42). When it moves to the position of the support plate (32), the arc-shaped design of the support plate (32) allows the steel pipe to move along the middle part of the support plate (32). Under the synchronous guidance of the support plate (32) and the conveying roller (42), the center of the steel pipe is aligned with the center of the welding turntable (11); S22: Two steel pipes are conveyed to the two sides of the welding turntable (11) by using the S-shaped fixed clamping roller (21), and the joint of the two steel pipes is located below the welding torch. At this time, the servo motor four (54) below the clamping part (2) operates to move the fixed clamping roller (21) on both sides and clamp the steel pipes; S23: During welding, the servo motor two (44) stops operating, and the servo cylinder one (13) operates to move the welding torch downward through the fixed seat (14), so that the welding torch approaches the steel pipe. After the welding machine is turned on, the joint is welded. During welding, the welding torch moves around the steel pipe, and the welding torch moves along the inside of the wire slot (124); S3: Welding is completed and the material is discharged; S31: After welding is completed, the servo motor two (44) operates again to discharge the welded steel pipe. At this time, the steel pipe to be welded is placed on the feeding end of the conveying roller (42), and the feeding is synchronized, so that the welding can continue; S32: The rotating direction of the welding turntable (11) is opposite for adjacent two weldings.

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