Cylinder longitudinal seam friction stir welding system

Abstract

The present invention discloses a friction stir welding system for longitudinal seams of barrel sections, comprising a base, on which a welding clamping turntable and a milling clamping turntable are arranged at intervals, a welding inner support assembly for clamping a plurality of arc-shaped plates for welding is fixedly arranged on the welding clamping turntable; a wall panel milling clamping assembly for clamping at least one arc-shaped plate is fixedly arranged on the milling clamping turntable; a power workbench is arranged between the welding clamping turntable and the milling clamping turntable, a welding main machine is slidably arranged on the power workbench on one side facing the welding clamping turntable, and a milling mechanism is slidably arranged on the power workbench on one side facing the milling clamping turntable. The welding system has a simple structure, can integrate milling, assembly, and welding displacement, effectively ensure the process requirements during welding, ensure the product row size, fully consider the loading and unloading methods, reduce labor intensity, reduce safety risks, and improve production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of welding systems, in particular to a friction stir welding system for longitudinal seams of cylinder sections. Background Art

[0002] With the continuous progress of society, the mechanical processing industry has been developing rapidly. The current mechanical processing methods are all completed by processing each process in sequence. In this way, the workpiece will go through many clamping and fixing steps, which has a great impact on the overall processing quality, consumes a lot of labor intensity, and greatly affects production efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in order to solve the problems existing in the above-mentioned background technology, a longitudinal friction stir welding system for cylinder sections is provided, which can integrate milling, assembly, and welding displacement, reduce labor intensity, reduce safety risks, and improve production efficiency.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a longitudinal seam stir friction welding system for a cylinder section, comprising a base, a welding clamping turntable and a milling clamping turntable are arranged at intervals on the base, a welding inner support component for clamping a plurality of arc-shaped plates for welding is fixedly arranged on the welding clamping turntable; a wall panel milling clamping component for clamping at least one arc-shaped plate is fixedly arranged on the milling clamping turntable; a power workbench is arranged between the welding clamping turntable and the milling clamping turntable, a welding main machine is slidably arranged on the power workbench on one side facing the welding clamping turntable, and a milling mechanism is slidably arranged on the power workbench on one side facing the milling clamping turntable.

[0005] To be more specific, in the above technical solution, the welding internal support assembly includes an internal support base plate, a triangular column is vertically fixed on the upper end of the internal support base plate, the triangular column is a hollow structure, and a plurality of first slide rails are vertically arranged on the side wall end face of the triangular column, the upper end of the first slide rail is slidably provided with an internal support upper clamping assembly, and the lower end of the first slide rail is slidably provided with an internal support lower clamping assembly, and the upper clamping assembly of the internal support and the lower clamping assembly of the internal support are clamped up and down to realize the clamping and fixation of the workpiece.

[0006] To be more specific, in the above technical solution, the inner support upper clamping assembly includes a first arc-shaped upper fixed plate, a first upper clamping fixed seat, a first upper clamping cylinder, a first upper clamping hook, a first drive motor, a first fixed rack and a top plate; one end of the first arc-shaped upper fixed plate is slidably set on the first slide rail, the first upper clamping fixed seat is fixedly set on the upper end of the first arc-shaped upper fixed plate, the first upper clamping cylinder is evenly fixed on the first upper clamping fixed seat, the protruding end of the first upper clamping cylinder fixes the first upper clamping hook, the first drive motor is vertically set on the first arc-shaped upper fixed plate, the output end of the first drive motor passes through the rear end of the first arc-shaped upper fixed plate and is connected to the first fixed rack through gear meshing, the first fixed rack is fixedly set on the top plate, and the top plate is located at the lower end of the first arc-shaped upper fixed plate.

[0007] To be more specific, in the above technical solution, the inner support lower clamping assembly includes a first arc-shaped lower fixed plate, a first lower clamping fixed seat, a first lower clamping cylinder, a first lower clamping hook, a second drive motor and a second fixed rack; one end of the first arc-shaped lower fixed plate is slidably set on the first slide rail, the first lower clamping fixed seat is fixedly set on the lower end surface of the first arc-shaped lower fixed plate, the first lower clamping cylinder is evenly fixedly set on the first lower clamping fixed seat, the output end of the first lower clamping cylinder is fixed to the first lower clamping hook, the first guard plate is vertically set on the side of the first arc-shaped lower fixed plate in contact with the triangular column, the second drive motor is vertically set in the middle of the first guard plate, the output end of the second drive motor passes through the rear end of the first guard plate and engages the second fixed rack through a gear, and the second fixed rack is fixedly set on the triangular column and is located between the first slide rails.

[0008] To be more specific, in the above technical solution, the wall panel milling clamping assembly includes a wall panel milling clamping base plate, a plurality of panels are vertically arranged on the wall panel milling clamping base plate, the panels are arranged parallel to the panels, U-shaped plates are vertically arranged on both sides of the panels, a plurality of second slide rails are vertically arranged on the inner wall of the U-shaped plate, the upper part of the second slide rail is slidingly provided with a wall panel milling upper clamping assembly, and the lower part of the second slide rail is slidingly provided with a wall panel milling lower clamping assembly; the upper wall panel milling clamping assembly and the lower wall panel milling clamping assembly respectively clamp the upper end and the lower end of the wall panel for fixing.

[0009] To be more specific, in the above technical solution, the wall panel milling upper clamping assembly includes a second arc-shaped upper fixed plate, a second upper clamping fixed seat, a second upper clamping cylinder, a second upper clamping hook, a third drive motor and a third fixed rack; one end of the second arc-shaped upper fixed plate is slidably set on the second slide rail, the second upper clamping fixed seat is fixedly set on the upper end of the second arc-shaped upper fixed plate, the second upper clamping cylinder is evenly fixed on the second upper clamping fixed seat, the protruding end of the second upper clamping cylinder is fixed to the second upper clamping hook, the second guard plate is vertically arranged on the side of the second arc-shaped upper fixed plate in contact with the U-shaped plate, the third drive motor is vertically arranged in the middle of the second guard plate, and one end of the third drive motor passes through the second guard plate and is meshed with the third fixed rack through a gear.

[0010] To be more specific, in the above technical solution, the wall panel clamping lower clamping assembly includes a second arc-shaped lower fixed plate, a second lower clamping fixed seat, a second lower clamping cylinder and a second lower clamping hook; one end of the second arc-shaped lower fixed plate is slidably set on the second slide rail, the second lower clamping fixed seat is fixedly set on the lower end surface of the second arc-shaped lower fixed plate, the second lower clamping cylinder is evenly fixed on the second lower clamping fixed seat, and the output end of the second lower clamping cylinder fixes the second lower clamping hook.

[0011] To be more specific, in the above technical solution, the welding main machine includes a first column, a second column, a connecting beam, an external clamping assembly and a milling assembly; the first column and the second column are vertically arranged on the power workbench, and the connecting beam is fixedly arranged at the upper end of the first column and the upper end of the second column; the external clamping assembly is fixedly arranged on one side of the first column and the second column; a retractable welding spindle is also arranged between the external clamping assemblies at the position opposite to the welding inner support assembly; the milling assembly is opposite to the wall panel milling clamping assembly.

[0012] To be more specific, in the above technical solution, the external clamping assembly includes an external clamping support frame, a sliding plate, a key cylinder, a key pressure plate and a support rod; a plurality of external clamping support frames are vertically arranged on one side of the first column and one side of the second column along the height direction, a sliding plate is movably arranged on the opposite side of the external clamping support frame, a plurality of support rods are evenly arranged on the end surface of one side of the sliding plate along the height direction, a key cylinder is fixedly arranged on one side of the support rod, the end of the key cylinder is hinged to the key pressure plate, and the middle part of the key pressure plate is hinged to the end of the support rod.

[0013] The beneficial effects of the present invention are as follows: the friction stir welding system for longitudinal seams of cylinder sections proposed by the present invention has a simple structure and can integrate milling, assembly, and welding displacement, effectively ensuring the process requirements during welding, ensuring the product positioning size, fully considering the loading and unloading methods, reducing labor intensity, reducing safety risks, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 yes Figure 1 Schematic diagram of the structure of the welded inner support assembly;

[0017] Figure 3 yes Figure 2 A partial enlarged schematic diagram of the clamping assembly on the inner support;

[0018] Figure 4 yes Figure 2 A partial enlarged schematic diagram of the clamping assembly under the inner support;

[0019] Figure 5 yes Figure 1 Schematic diagram of the structure of the milling clamping assembly of the middle wall panel;

[0020] Figure 6 yes Figure 5 A partial enlarged structural diagram of the clamping assembly for milling the middle wall panel;

[0021] Figure 7 yes Figure 5 A partial enlarged structural diagram of the clamping assembly for milling the middle wall panel;

[0022] Figure 8 yes Figure 1 Schematic diagram of the structure of the Chinese and foreign compression components;

[0023] Figure 9 yes Figure 8 Schematic diagram of the local enlarged structure.

[0024] The numbers in the accompanying drawings are: 1, base; 2, welding clamping turntable; 3, milling clamping turntable; 4, power workbench; 5, welding host; 6, operating table; 7, inner support base plate; 8, triangular column; 9, first slide rail; 10, first arc-shaped upper fixed plate; 11, first upper clamping fixed seat; 12, first upper clamping cylinder; 13, first upper clamping hook; 14, first drive motor; 15, first fixed rack; 16, top plate; 17, first arc-shaped lower fixed plate; 18, first lower clamping fixed seat; 19, first lower clamping cylinder; 20, first lower clamping hook; 21, second drive motor; 22, second fixed rack; 23, first guard plate; 24, Wall panel milling clamping base plate; 25. Panel; 26. U-shaped plate; 27. Second slide rail; 28. Second arc-shaped upper fixed plate; 29. ​​Second upper clamping fixed seat; 30. Second upper clamping cylinder; 31. Second upper clamping hook; 32. Third drive motor; 33. Third fixed rack; 34. Second guard plate; 35. Second arc-shaped lower fixed plate; 36. Second lower clamping fixed seat; 37. Second lower clamping cylinder; 38. Second lower clamping hook; 39. First column; 40. Second column; 41. Connecting beam; 42. Retractable welding spindle; 43. External clamping support frame; 44. Sliding plate; 45. Key cylinder; 46. Key pressure plate; 47. Support rod. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "one side", "the other side", "both sides", "between", "middle", "upper end", "lower end", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0028] See Figures 1 to 8 A friction stir welding system for longitudinal seams of cylinder sections comprises a base 1, on which a welding clamping turntable 2 and a milling clamping turntable 3 are arranged at intervals. The welding clamping turntable 2 is fixedly provided with a welding inner support assembly for clamping a plurality of curved plates for welding; the milling clamping turntable 3 is fixedly provided with a wall panel milling clamping assembly for clamping at least one curved plate; a power workbench 4 is arranged between the welding clamping turntable 2 and the milling clamping turntable 3, a welding main unit 5 is slidably arranged on the side of the power workbench 4 facing the welding clamping turntable 2, and a milling mechanism is slidably arranged on the side of the power workbench 4 facing the milling clamping turntable 3. An operating table 6 is fixedly provided on one side of the power workbench 4.

[0029] Among them, the welding internal support assembly includes an internal support base plate 7, a triangular column 8 is vertically fixed on the upper end of the internal support base plate 7, the triangular column 8 is a hollow structure, and a number of first slide rails 9 are vertically arranged on the side wall end face of the triangular column 8. The upper end of the first slide rail 9 is slidingly provided with an internal support upper clamping assembly, and the lower end of the first slide rail 9 is slidingly provided with an internal support lower clamping assembly. The internal support upper clamping assembly and the internal support lower clamping assembly are clamped up and down to realize the clamping and fixation of the workpiece. The inner support upper clamping assembly includes a first arc-shaped upper fixed plate 10, a first upper clamping fixed seat 11, a first upper clamping cylinder 12, a first upper clamping hook 13, a first drive motor 14, a first fixed rack 15 and a top plate 16; one end of the first arc-shaped upper fixed plate 10 is slidably set on the first slide rail 9, the first upper clamping fixed seat 11 is fixedly set on the upper end of the first arc-shaped upper fixed plate 10, the first upper clamping cylinder 12 is evenly fixed on the first upper clamping fixed seat 11, the protruding end of the first upper clamping cylinder 12 is fixed to the first upper clamping hook 13, the first drive motor 14 is vertically set on the first arc-shaped upper fixed plate 10, the output end of the first drive motor 14 passes through the rear end of the first arc-shaped upper fixed plate 10 and is connected to the first fixed rack 15 through gear meshing, the first fixed rack 15 is fixedly set on the top plate 16, and the top plate 16 is located at the lower end of the first arc-shaped upper fixed plate 10. The inner support lower clamping assembly includes a first arc-shaped lower fixed plate 17, a first lower clamping fixed seat 18, a first lower clamping cylinder 19, a first lower clamping hook 20, a second drive motor 21 and a second fixed rack 22; one end of the first arc-shaped lower fixed plate 17 is slidably set on the first slide rail 9, the first lower clamping fixed seat 18 is fixedly set on the lower end surface of the first arc-shaped lower fixed plate 17, the first lower clamping cylinder 19 is evenly fixed on the first lower clamping fixed seat 18, the output end of the first lower clamping cylinder 19 is fixed with the first lower clamping hook 20, and the first guard plate 23 is vertically set on the side where the first arc-shaped lower fixed plate 17 contacts the triangular column 8, the second drive motor 21 is vertically set in the middle of the first guard plate 23, and the output end of the second drive motor 21 passes through the rear end of the first guard plate 23 and engages the second fixed rack 22 through a gear, and the second fixed rack 22 is fixedly set on the triangular column 8 and is located between the first slide rails 9. The wall panel milling clamping assembly includes a wall panel milling clamping base plate 24, a plurality of panels 25 are vertically arranged on the wall panel milling clamping base plate 24, the panels 25 are arranged parallel to the panels 25, U-shaped plates 26 are vertically arranged on both sides of the panels 25, a plurality of second slide rails 27 are vertically arranged on the inner wall of the U-shaped plate 26, the upper part of the second slide rail 27 is slidably provided with the wall panel milling upper clamping assembly, and the lower part of the second slide rail 27 is slidably provided with the wall panel milling lower clamping assembly; the wall panel milling upper clamping assembly and the wall panel milling lower clamping assembly respectively clamp the upper end and the lower end of the wall panel for fixing.The wall panel milling upper clamping assembly includes a second arc-shaped upper fixed plate 28, a second upper clamping fixed seat 29, a second upper clamping cylinder 30, a second upper clamping hook 31, a third drive motor 32 and a third fixed rack 33; one end of the second arc-shaped upper fixed plate 28 is slidably set on the second slide rail 27, the second upper clamping fixed seat 29 is fixedly set on the upper end of the second arc-shaped upper fixed plate 28, the second upper clamping cylinder 30 is evenly fixed on the second upper clamping fixed seat 29, the protruding end of the second upper clamping cylinder 30 is fixed to the second upper clamping hook 31, and a second guard plate 34 is vertically arranged on the side where the second arc-shaped upper fixed plate 28 contacts the U-shaped plate 26, and the third drive motor 32 is vertically arranged in the middle of the second guard plate 34. One end of the third drive motor 32 passes through the second guard plate 34 and is meshed with the third fixed rack 33 through a gear. The wall panel clamping lower clamping assembly includes a second arc-shaped lower fixing plate 35, a second lower clamping fixing seat 36, a second lower clamping cylinder 37 and a second lower clamping hook 38; one end of the second arc-shaped lower fixing plate 35 is slidably set on the second slide rail 27, the second lower clamping fixing seat 36 is fixedly set on the lower end surface of the second arc-shaped lower fixing plate 35, the second lower clamping cylinder 37 is evenly fixed on the second lower clamping fixing seat 36, and the output end of the second lower clamping cylinder 37 is fixed to the second lower clamping hook 38. The welding main machine includes a first column 39, a second column 40, a connecting beam 41, an external clamping assembly and a milling assembly; the first column 39 and the second column 40 are vertically arranged on the power workbench 4, and the connecting beam 41 is fixedly arranged at the upper end of the first column 39 and the upper end of the second column 40; the external clamping assembly is fixedly arranged on one side of the first column 39 and the second column 40; a retractable welding spindle 42 is also arranged between the external clamping assemblies at the position opposite to the welding inner support assembly; the milling assembly is opposite to the wall panel milling clamping assembly. The external clamping assembly includes an external clamping support frame 43, a sliding plate 44, a key cylinder 45, a key pressure plate 46 and a support rod 47; a plurality of external clamping support frames 43 are vertically arranged along the height direction on one side of the first column 39 and one side of the second column 40, a sliding plate 44 is movably arranged on the opposite side of the external clamping support frame 43, and a plurality of support rods 47 are evenly arranged on the end face of one side of the sliding plate 44 along the height direction, and a key cylinder 45 is fixedly arranged on one side of the support rod 47, and the end of the key cylinder 45 is hinged to the key pressure plate 46, and the middle part of the key pressure plate 46 is hinged to the end of the support rod 47.

[0030] See Figures 2-4 It is a structural diagram of the welding inner support assembly; the workpiece is clamped and fixed on the welding inner support assembly through the inner support upper clamping assembly and the inner support lower clamping assembly, and is welded and fixed through the retractable welding spindle 42 on the welding host 5.

[0031] See Figures 5-7 It is a structural diagram of the wall panel milling clamping assembly, which can facilitate the clamping and fixing of wall panel workpieces on the wall panel milling clamping assembly, and facilitate milling processing through the milling mechanism at one end of the welding host 5.

[0032] See Figures 8-9 This is a structural diagram of the external clamping component; in this way, the external clamping component can be used to clamp and fix the surface of the workpiece clamped by the welding internal support component, which facilitates subsequent welding and fixation, reduces deformation, and improves overall welding efficiency.

[0033] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A friction stir welding system for longitudinal seams of barrel sections, characterized in that: The invention comprises a base (1), wherein a welding clamping turntable (2) and a milling clamping turntable (3) are arranged at intervals on the base (1); a welding inner support component for clamping a plurality of arc-shaped plates for welding is fixedly arranged on the welding clamping turntable (2); a wall panel milling clamping component for clamping at least one arc-shaped plate is fixedly arranged on the milling clamping turntable (3); a power worktable (4) is arranged between the welding clamping turntable (2) and the milling clamping turntable (3); a welding main machine (5) is slidably arranged on the side of the power worktable (4) facing the welding clamping turntable (2); the power worktable (4) A milling mechanism is slidably arranged on one side of the milling clamping turntable (3); the welding inner support assembly comprises an inner support base plate (7); a triangular column (8) is vertically fixed on the upper end of the inner support base plate (7); the triangular column (8) is hollow in structure; a plurality of first slide rails (9) are vertically arranged on the side wall end surface of the triangular column (8); an inner support upper clamping assembly is slidably arranged on the upper end of the first slide rail (9); an inner support lower clamping assembly is slidably arranged on the lower end of the first slide rail (9); the inner support upper clamping assembly and the inner support lower clamping assembly clamp up and down to achieve clamping and fixing of the workpiece; The inner support upper clamping assembly comprises a first arc-shaped upper fixing plate (10), a first upper clamping fixing seat (11), a first upper clamping cylinder (12), a first upper clamping hook (13), a first driving motor (14), a first fixed rack (15) and a top plate (16); one end of the first arc-shaped upper fixing plate (10) is slidably arranged on the first slide rail (9), the first upper clamping fixing seat (11) is fixedly arranged on the upper end of the first arc-shaped upper fixing plate (10), and the first upper clamping cylinder (12) is evenly fixed On the first upper clamping fixing seat (11), the protruding end of the first upper clamping cylinder (12) is fixed to the first upper clamping hook (13), the first driving motor (14) is vertically arranged on the first arc-shaped upper fixing plate (10), the output end of the first driving motor (14) passes through the rear end of the first arc-shaped upper fixing plate (10) and is connected to the first fixed rack (15) through gear meshing, the first fixed rack (15) is fixedly arranged on the top plate (16), and the top plate (16) is located at the lower end of the first arc-shaped upper fixing plate (10); The inner support lower clamping assembly comprises a first arc-shaped lower fixing plate (17), a first lower clamping fixing seat (18), a first lower clamping cylinder (19), a first lower clamping hook (20), a second drive motor (21) and a second fixed rack (22); one end of the first arc-shaped lower fixing plate (17) is slidably arranged on the first slide rail (9), the first lower clamping fixing seat (18) is fixedly arranged on the lower end surface of the first arc-shaped lower fixing plate (17), and the first lower clamping cylinder (19) is evenly fixedly arranged on the first lower clamping fixing seat ( 18), the output end of the first lower clamping cylinder (19) is fixed to the first lower clamping hook (20), a first guard plate (23) is vertically arranged on the side of the first arc-shaped lower fixed plate (17) in contact with the triangular column (8), the second drive motor (21) is vertically arranged in the middle of the first guard plate (23), the output end of the second drive motor (21) passes through the rear end of the first guard plate (23) and engages with the second fixed rack (22) through a gear, and the second fixed rack (22) is fixedly arranged on the triangular column (8) and located between the first slide rails (9).

2. The longitudinal seam friction stir welding system of barrel section according to claim 1 is characterized in that: The wall panel milling clamping assembly comprises a wall panel milling clamping base plate (24), a plurality of panels (25) are vertically arranged on the wall panel milling clamping base plate (24), the panels (25) are arranged parallel to the panels (25), U-shaped plates (26) are vertically arranged on both sides of the panels (25), a plurality of second slide rails (27) are vertically arranged on the inner wall of the U-shaped plate (26), an upper wall panel milling clamping assembly is slidably arranged on the upper part of the second slide rail (27), and a lower wall panel milling clamping assembly is slidably arranged on the lower part of the second slide rail; the upper wall panel milling clamping assembly and the lower wall panel milling clamping assembly respectively clamp the upper end and the lower end of the wall panel for fixing.

3. The friction stir welding system for longitudinal seams of barrel sections according to claim 2 is characterized in that: The wall panel milling upper clamping assembly comprises a second arc-shaped upper fixing plate (28), a second upper clamping fixing seat (29), a second upper clamping cylinder (30), a second upper clamping hook (31), a third drive motor (32) and a third fixed rack (33); one end of the second arc-shaped upper fixing plate (28) is slidably arranged on the second slide rail (27), the second upper clamping fixing seat (29) is fixedly arranged on the upper end of the second arc-shaped upper fixing plate (28), and the second upper clamping The cylinder (30) is evenly fixed on the second upper clamping fixing seat (29), the extended end of the second upper clamping cylinder (30) is fixed to the second upper clamping hook (31), a second guard plate (34) is vertically arranged on the side where the second arc-shaped upper fixing plate (28) contacts the U-shaped plate (26), the third driving motor (32) is vertically arranged in the middle of the second guard plate (34), and one end of the third driving motor (32) passes through the second guard plate (34) and is meshed and connected with the third fixed rack (33) through a gear.

4. The friction stir welding system for longitudinal seams of barrel sections according to claim 2, characterized in that: The wall panel clamping lower clamping assembly comprises a second arc-shaped lower fixing plate (35), a second lower clamping fixing seat (36), a second lower clamping cylinder (37) and a second lower clamping hook (38); one end of the second arc-shaped lower fixing plate (35) is slidably arranged on the second slide rail (27), the second lower clamping fixing seat (36) is fixedly arranged on the lower end surface of the second arc-shaped lower fixing plate (35), the second lower clamping cylinder (37) is evenly fixedly arranged on the second lower clamping fixing seat (36), and the output end of the second lower clamping cylinder (37) is fixed to the second lower clamping hook (38).

5. The friction stir welding system for longitudinal seams of barrel sections according to claim 1, characterized in that: The welding main machine comprises a first column (39), a second column (40), a connecting beam (41), an external clamping assembly and a milling assembly; the first column (39) and the second column (40) are vertically arranged on a power workbench (4), and the connecting beam (41) is fixedly arranged at the upper end of the first column (39) and the upper end of the second column (40); the external clamping assembly is fixedly arranged on one side of the first column (39) and the second column (40); a retractable welding spindle (42) is also arranged between the external clamping assemblies at the position opposite to the welding inner support assembly; the milling assembly is opposite to the wall panel milling clamping assembly.

6. The friction stir welding system for longitudinal seams of barrel sections according to claim 5, characterized in that: The external clamping assembly comprises an external clamping support frame (43), a sliding plate (44), a key cylinder (45), a key pressure plate (46) and a support rod (47); a plurality of external clamping support frames (43) are vertically arranged on one side of the first column (39) and one side of the second column (40) along the height direction, a sliding plate (44) is movably arranged on the opposite side of the external clamping support frame (43), a plurality of support rods (47) are evenly arranged on the end surface of one side of the sliding plate (44) along the height direction, a key cylinder (45) is fixedly arranged on one side of the support rod (47), the end of the key cylinder (45) is hinged to the key pressure plate (46), and the middle part of the key pressure plate (46) is hinged to the end of the support rod (47).

Images