Cylinder section end face welding shape maintaining device

Abstract

The invention provides a cylinder section end face welding shape maintaining device. The cylinder section end face welding shape maintaining device comprises a front welding face shape maintaining module, a lower-layer cylinder section shape maintaining module, an upper-layer cylinder section shape maintaining module, a welding face clamp and a welding operation table. A front-end shape-preserving device, a rear-end shape-preserving device and a welding operation table are arranged on the workbench, the two ends of a barrel section to be welded and machined are clamped through the front-end shape-preserving device and the rear-end shape-preserving device respectively, and the welding operation table is arranged at the position close to the front-end shape-preserving device; through cooperation of the front welding surface shape-preserving module, the lower-layer cylinder section shape-preserving module, the upper-layer cylinder section shape-preserving module and the welding surface clamp, shape-preserving and stress release in the welding process are accurately controlled by designing clamping point positions and controlling clamping force and clamping amplitude, the welding quality of a large-size cylinder is improved, and the welding quality of the large-size cylinder is improved. And finally, welding of the cylinder section assembly is achieved.

Description

Technical Field

[0001] The present invention relates to the field of cylinder segment shape preservation and welding, and in particular to a cylinder segment end face welding shape preservation device, and in particular to a long-span cylinder segment end face welding shape preservation device. Background Art

[0002] Industrial cylindrical devices are large in size and weight, and need to be fixed and supported by a shape-preserving device before cutting, welding and other operations. Patent document with publication number CN105451930A discloses a support device for cylindrical container manufacturing, and patent document with publication number CN206500834U discloses a cylinder welding robot. Most existing welding methods are for single drum rotary welding or straight seam welding conditions, and lack design solutions for cylinder segment assembly welding. Summary of the invention

[0003] In view of the defects in the prior art, an object of the present invention is to provide a cylinder end face welding shape retaining device.

[0004] A barrel end face welding shape-keeping device provided according to the present invention comprises: a front welding face shape-keeping module, a lower barrel section shape-keeping module, an upper barrel section shape-keeping module, a welding face fixture and a welding operation table;

[0005] A front end shape retaining device, a rear end shape retaining device and a welding operation table are arranged on the workbench, and the two ends of the barrel section to be welded are clamped by the front end shape retaining device and the rear end shape retaining device respectively, and the welding operation table is arranged near the front end shape retaining device;

[0006] The front end shape-keeping device comprises: a front welding surface shape-keeping module and a welding surface fixture;

[0007] The front welding surface shape-keeping module and the welding surface fixture are installed on a workbench, and the front welding surface shape-keeping module is located at the middle of the lower end of the welding surface fixture;

[0008] The rear end shape-keeping device comprises: a lower barrel section shape-keeping module and an upper barrel section shape-keeping module;

[0009] The lower barrel section conforming module and the upper barrel section conforming module are installed on a workbench, and the lower barrel section conforming module is located at the inner side of the lower end of the upper barrel section conforming module.

[0010] Preferably, the front welding surface shape-keeping module comprises: a front welding surface shape-keeping module fixture, a front welding surface shape-keeping module moving slide rail and a front welding surface shape-keeping module bottom lifting platform;

[0011] The bottom lifting platform of the front welding surface shape-keeping module is installed on a workbench, and a front welding surface shape-keeping module moving slide rail is arranged at the upper end of the bottom lifting platform of the front welding surface shape-keeping module, and the front welding surface shape-keeping module fixture is slidably installed on the front welding surface shape-keeping module moving slide rail.

[0012] When performing the shape-keeping work, a plurality of the front welding surface shape-keeping modules are arranged on the workbench along the periphery of the front welding surface of the lower barrel section. Before installing on the workbench, adjust the bottom lifting platform of each front welding surface shape-keeping module to the required height so that there is enough gap in the vertical direction, and then adjust the welding surface shape-keeping fixture so that there is enough gap in the thickness direction of the welding surface of the lower barrel section, and the position of the welding surface shape-keeping fixture does not exceed the two ends of the moving slide rail of the front welding surface shape-keeping module. After the lower barrel section is installed on the workbench, adjust the height of the bottom lifting platform of each front welding surface shape-keeping module so that the upper edge height of the welding surface shape-keeping fixture is higher than the lower edge of the front welding surface of the lower barrel section, and then adjust the welding surface shape-keeping fixture so that it completely clamps the front welding surface of the lower barrel section to complete the shape-keeping of the front welding surface.

[0013] Preferably, the lower barrel section shape-keeping module comprises: a lower shape-keeping roller frame support seat and a lower shape-keeping roller frame;

[0014] The lower shape-retaining roller frame support seat is installed on the workbench, the lower shape-retaining roller frame is installed on the lower shape-retaining roller frame support seat, and the lower shape-retaining roller frame is provided with rollers.

[0015] Preferably, the upper barrel section shape-keeping module comprises: a lower shape-keeping frame support, a lower shape-keeping support frame, an upper shape-keeping support frame and an upper shape-keeping roller frame;

[0016] The lower profile retaining frame pillar is installed on the workbench, the lower profile retaining support frame is installed on the lower profile retaining frame pillar, the upper profile retaining support frame and the upper profile retaining roller frame are installed on the lower profile retaining support frame, and the upper profile retaining roller frame is located at the inner side of the bottom of the upper profile retaining support frame.

[0017] Preferably, the shape of the lower shape-retaining support frame facing the workbench is adapted to the shape of the barrel section, the shape of the upper shape-retaining support frame facing the workbench is adapted to the shape of the barrel section, and the upper shape-retaining roller frame is provided with rollers.

[0018] Preferably, the welding surface fixture comprises: a fixture frame and a rotary clamping support cylinder;

[0019] The clamp frame is installed on a workbench. The clamp frame is configured as a square frame structure. A plurality of inwardly telescopic rotating clamping support cylinders are distributed on the periphery of the clamp frame.

[0020] Preferably, the welding operation table comprises: a front welding surface welding operation table and a rear welding surface welding operation table;

[0021] The front welding surface welding operation table and the rear welding surface welding operation table are located at two sides of the welding surface fixture. The front welding surface welding operation table can be movably placed on a horizontal ground, and the rear welding surface welding operation table is installed on a workbench.

[0022] Preferably, the front welding surface welding operation platform comprises: a front welding surface welding operation platform moving base, a front welding surface welding operation platform lifting platform and a front welding surface welding operation platform welding robot;

[0023] The front welding surface welding operation table movable base can be movably placed on the ground, and the front welding surface welding operation table welding robot is installed on the front welding surface welding operation table movable base through the welding surface welding operation table lifting platform.

[0024] Preferably, the rear welding surface welding operation platform comprises: a rear welding surface welding operation platform lifting platform and a rear welding surface welding operation platform welding robot;

[0025] The rear welding surface welding operation table welding robot is installed on the workbench through the rear welding surface welding operation table lifting platform.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. This application adopts the cooperation of the front welding surface shape-keeping module, the lower barrel section shape-keeping module, the upper barrel section shape-keeping module and the welding surface fixture. By designing the clamping points and controlling the clamping force and clamping amplitude, the shape-keeping and stress release during the welding process are precisely controlled, the welding quality of large-size cylinders is improved, and finally the welding of barrel section components is realized.

[0028] 2. This application can fix the upper barrel section and the lower barrel section at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0030] Figure 1 It is a schematic diagram of the overall structure of the barrel end face welding shape-preserving device;

[0031] Figure 2 This is a schematic diagram of the front welding surface shape-preserving module structure;

[0032] Figure 3 It is a schematic diagram of the welding surface fixture structure;

[0033] Figure 4 This is a schematic diagram of the structure of the welding operation table on the front welding surface;

[0034] Figure 5This is a schematic diagram of the structure of the welding operation table on the rear welding surface;

[0035] As shown in the figure:

[0036]

[0037] DETAILED DESCRIPTION

[0038] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0039] Example 1

[0040] like Figure 1 As shown, this embodiment includes: a front welding surface conforming module 1, a lower barrel section conforming module 2, an upper barrel section conforming module 3, a welding surface fixture 4 and a welding operating table 5; a front end conforming device, a rear end conforming device and a welding operating table 5 are arranged on the workbench, and the two ends of the barrel section to be welded are clamped by the front end conforming device and the rear end conforming device respectively, and the welding operating table 5 is arranged near the front end conforming device; the front end conforming device includes: a front welding surface conforming module 1 and a welding surface fixture 4; the front welding surface conforming module 1 and the welding surface fixture 4 are installed on the workbench, and the front welding surface conforming module 1 is located at the middle part of the lower end of the welding surface fixture 4; the rear end conforming device includes: a lower barrel section conforming module 2 and an upper barrel section conforming module 3; the lower barrel section conforming module 2 and the upper barrel section conforming module 3 are installed on the workbench, and the lower barrel section conforming module 2 is located on the inner side of the lower end of the upper barrel section conforming module 3.

[0041] like Figure 2 As shown, the front welding surface conforming module 1 includes: a front welding surface conforming module fixture 11, a front welding surface conforming module moving slide rail 12 and a front welding surface conforming module bottom lifting platform 13; the front welding surface conforming module bottom lifting platform 13 is installed on a workbench, and the front welding surface conforming module moving slide rail 12 is set at the upper end of the front welding surface conforming module bottom lifting platform 13, and the front welding surface conforming module fixture 11 is slidably installed on the front welding surface conforming module moving slide rail 12.

[0042] The lower barrel section shape-keeping module 2 includes: a lower shape-keeping roller frame support seat 21 and a lower shape-keeping roller frame 22; the lower shape-keeping roller frame support seat 21 is installed on the workbench, and the lower shape-keeping roller frame 22 is installed on the lower shape-keeping roller frame support seat 21, and the lower shape-keeping roller frame 22 is provided with rollers.

[0043] The upper barrel section shape-keeping module 3 includes: a lower shape-keeping frame pillar 31, a lower shape-keeping support frame 32, an upper shape-keeping support frame 33 and an upper shape-keeping roller frame 34; the lower shape-keeping frame pillar 31 is installed on the workbench, the lower shape-keeping support frame 32 is installed on the lower shape-keeping frame pillar 31, the upper shape-keeping support frame 33 and the upper shape-keeping roller frame 34 are installed on the lower shape-keeping support frame 32, and the upper shape-keeping roller frame 34 is located at the inner side of the bottom of the upper shape-keeping support frame 33. The shape of the lower shape-keeping support frame 32 facing the workbench is adapted to the shape of the barrel section, the shape of the upper shape-keeping support frame 33 facing the workbench is adapted to the shape of the barrel section, and the upper shape-keeping roller frame 34 is provided with rollers.

[0044] like Figure 3 As shown, the welding surface fixture 4 includes: a fixture frame 41 and a rotating clamping support cylinder 42; the fixture frame 41 is installed on the workbench, and the fixture frame 41 is set as a square frame structure. A plurality of rotating clamping support cylinders 42 that extend inward are distributed around the periphery of the fixture frame 41. Since the front welding surfaces of the upper and lower barrel sections are assembled together, relative movement is likely to occur during the welding operation. Before the welding operation is performed, the left and right welding surface fixtures 4 are clamped on the periphery of the front welding surfaces of the upper and lower barrel sections, and cooperate with the lower barrel section shape-keeping module 2 and the lower barrel section shape-keeping module 3 to maintain the stability of the position of the upper and lower barrel sections during the welding process.

[0045] like Figure 4-5 As shown, the welding operation table 5 includes: a front welding surface welding operation table 51 and a rear welding surface welding operation table 52; the front welding surface welding operation table 51 and the rear welding surface welding operation table 52 are located on both sides of the welding surface fixture 4, the front welding surface welding operation table 51 can be movably placed on the horizontal ground, and the rear welding surface welding operation table 52 is installed on the workbench. The front welding surface welding operation table 51 includes: a front welding surface welding operation table moving base 5101, a front welding surface welding operation table lifting platform 5102 and a front welding surface welding operation table welding robot 5103; the front welding surface welding operation table moving base 5101 can be movably placed on the ground, and the front welding surface welding operation table welding robot 5103 is installed on the front welding surface welding operation table moving base 5101 through the welding surface welding operation table lifting platform 5102. The rear welding surface welding operation table 52 includes: a rear welding surface welding operation table lifting platform 5201 and a rear welding surface welding operation table welding robot 5202; the rear welding surface welding operation table welding robot 5202 is installed on the workbench through the rear welding surface welding operation table lifting platform 5201. In actual work, there is no shielding on one side of the front welding surface, and the front welding surface welding operation table 51 can be moved and placed on the horizontal ground. On the other side of the front welding surface, the upper and lower layers of cylinder sections are placed in parallel, and there are no other connecting components between the left and right cylinder sections of each layer. The gap size is larger than the vertical cross-sectional size of the rear welding surface welding operation table lifting platform 5201, and the rear welding surface welding operation table 52 can be hoisted by an overhead crane and installed on the workbench.

[0046] In one embodiment, roller brackets are installed on the left and right sides of the base of the lower profile-retaining roller frame 22, and rollers are installed on the roller brackets. The left and right roller brackets are connected together by two reverse ball screws inside the base, and the rotation of the screws drives the roller frames to move closer or farther away from each other, thereby achieving adjustment and clamping. The structure of the upper profile-retaining roller frame 34 is consistent with that of the lower profile-retaining roller frame 22.

[0047] Working principle:

[0048] When performing the shape-keeping work, first install the front welding surface shape-keeping module 1 on the workbench along the periphery of the front welding surface of the lower barrel section, adjust the bottom lifting platform 13 of the front welding surface shape-keeping module and the front welding surface shape-keeping module fixture 11 to clamp the front welding surface of the lower barrel section. Then install the lower barrel section shape-keeping module 2 and the upper barrel section shape-keeping module 3 on the side away from the welding surface, and adjust the roller positions on the lower shape-keeping roller frame 22 and the upper shape-keeping roller frame 34 to achieve the shape-keeping of the upper and lower barrel sections away from the welding surface. After that, install the welding surface fixture 4 to the periphery of the front welding surface of the barrel section, and clamp the periphery of the front welding surfaces of the upper and lower barrel sections at the same time through multiple inwardly telescopic rotating clamping support cylinders 42 to prevent relative movement between the welding surfaces of the upper and lower barrel sections. After performing the above operations, drag the front welding surface welding operation table 51 to the specified position and fix it, and lift the rear welding surface welding operation table 52 to the specified position of the workbench by the overhead crane and fix it, and then the welding work can be carried out.

[0049] Example 2

[0050] Example 2 is a preferred example of Example 1.

[0051] like Figure 1-5 As shown, this embodiment includes: a front welding surface conforming module 1, a lower barrel section conforming module 2, an upper barrel section conforming module 3, a welding surface clamp 4 and a welding operating table 5; the front welding surface conforming modules 1 are distributed and installed at both ends and the center of the bottom of the barrel section welding surface, the upper front welding surface conforming module clamp 11 is used to clamp the front welding surface of the barrel section, and the bottom lifting platform 13 of the lower front welding surface conforming module is fixedly connected to the workbench; the lower barrel section conforming module 2 is installed at the end of the lower barrel section away from the front welding surface, and is mainly used to support and fix the barrel arm of the lower barrel section; the upper barrel section conforming module 3 is installed directly above the lower barrel section conforming module 2 and the lower barrel section, and is used to support and fix the barrel arm of the upper barrel section; the welding surface clamp 4 is installed on both sides of one end of the workbench, and is used to clamp and fix the barrel section welding surface during welding; the welding operating table 5 acts on the front and rear welding surfaces of the barrel section, and is hoisted to the designated position to perform welding operations after the conforming is completed.

[0052] The front welding surface conforming module 1 includes: a front welding surface conforming module fixture 11, a front welding surface conforming module moving slide rail 12, and a front welding surface conforming module bottom lifting platform 13; the front welding surface conforming module fixture 11 is installed above the front welding surface conforming module moving slide rail 12, and can move freely on the front welding surface conforming module slide rail 12, the front welding surface conforming module slide rail 12 is installed on the front welding surface conforming module bottom lifting platform 13, the bottom of the front welding surface conforming module lifting platform 13 is fixed on the workbench, and the front welding surface conforming module lifting platform 13 moves up and down, driving the front welding surface conforming module slide rail 12 and the front welding surface conforming module fixture 11 to move up and down.

[0053] When performing the shape-keeping work, multiple front welding surface shape-keeping modules 1 are arranged on the workbench along the periphery of the front welding surface of the lower barrel section. Before installing on the workbench, adjust the bottom lifting platform 13 of each front welding surface shape-keeping module to the required height so that it leaves enough space in the vertical direction, and then adjust the front welding surface shape-keeping module fixture 11 so that it leaves enough space in the thickness direction of the welding surface of the lower barrel section, and the two ends of the front welding surface shape-keeping module fixture 11 do not exceed the front welding surface shape-keeping module moving slide rail 12. After installing on the workbench, adjust the height of the bottom lifting platform 13 of each front welding surface shape-keeping module so that the upper edge height of the front welding surface shape-keeping module fixture 11 is higher than the lower edge of the front welding surface of the lower barrel section, and then adjust the front welding surface shape-keeping module fixture 11 so that it completely clamps the front welding surface of the lower barrel section to complete the front welding surface shape-keeping.

[0054] The lower barrel section shaping module 2 includes: a lower shaping roller frame support seat 21 and a lower shaping roller frame 22. The lower shaping roller frame 22 is installed on the lower shaping roller frame support seat 21. When working, the rollers of the lower shaping roller frame 22 are locked and close to the barrel arm of the barrel section assembly.

[0055] The upper barrel section shape-keeping module 3 includes: a lower shape-keeping frame pillar 31, a lower shape-keeping support frame 32, an upper shape-keeping support frame 33 and an upper shape-keeping roller frame 34; the lower shape-keeping frame pillar 31 is installed on the workbench, and the lower shape-keeping support frame 32 is installed on the lower shape-keeping frame pillar 31 to ensure that the arc surface on the inner side of the lower shape-keeping support frame 32 is completely fitted with the outer wall of the lower double cylinder, and the upper shape-keeping roller frame 34 is installed on the lower shape-keeping support frame 32, and the angle of the wheel group of the upper shape-keeping roller frame 34 is adjusted to fully clamp the outer wall of the double-cylinder unit and lock the roller, and the upper shape-keeping support frame 33 is installed on the lower shape-keeping support frame 32 to ensure that the arc surface on the inner side of the upper shape-keeping support frame 33 is completely fitted with the outer wall of the upper barrel section.

[0056] The welding surface fixture 4 is symmetrically designed and installed on both sides of one end of the workbench, including: a fixture frame 41 and a rotating clamping support cylinder 42. The rotating clamping support cylinder 42 is distributed on the periphery of the fixture frame 41 to fix the upper and lower barrel section welding surfaces.

[0057] The front welding surfaces of the upper and lower barrel sections are assembled together, and are prone to relative movement during the welding operation. Before the welding operation is performed, the left and right welding surface clamps 4 are clamped on the periphery of the front welding surfaces of the upper and lower barrel sections, and cooperate with the lower barrel section shape-keeping modules 2 and 3 to maintain the stability of the positions of the upper and lower barrel sections during the welding process.

[0058] The welding operation platform 5 includes: a front welding surface welding operation platform 51 and a rear welding surface welding operation platform 52. The front welding surface welding operation platform 51 includes: a front welding surface welding operation platform moving base 5101, a front welding surface welding operation platform lifting platform 5102, and a front welding surface welding operation platform welding robot 5103. The rear welding surface welding operation platform 52 includes: a rear welding surface welding operation platform lifting platform 5201 and a rear welding surface welding operation platform welding robot 5202. The front welding surface welding operation platform 51 and the rear welding surface welding operation platform 52 work together to complete the welding task according to the welding requirements.

[0059] This embodiment can achieve welding and shape retention of barrel section assemblies of any size and any number by changing the design size, installation number, etc. of the device used.

[0060] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0061] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A barrel end face welding shape-preserving device, characterized in that: include: A front welding surface shape-keeping module (1), a lower barrel section shape-keeping module (2), an upper barrel section shape-keeping module (3), a welding surface fixture (4) and a welding operation table (5); A front end shape retaining device, a rear end shape retaining device and a welding operation table (5) are arranged on the workbench, and the two ends of the barrel section to be welded are clamped by the front end shape retaining device and the rear end shape retaining device respectively, and the welding operation table (5) is arranged near the front end shape retaining device; The front end shape-preserving device comprises: a front welding surface shape-preserving module (1) and a welding surface clamp (4); The front welding surface shape-keeping module (1) and the welding surface fixture (4) are installed on a workbench, and the front welding surface shape-keeping module (1) is located at the middle of the lower end of the welding surface fixture (4); The rear end shape-keeping device comprises: a lower barrel section shape-keeping module (2) and an upper barrel section shape-keeping module (3); The lower barrel section shape-keeping module (2) and the upper barrel section shape-keeping module (3) are installed on a workbench, and the lower barrel section shape-keeping module (2) is located on the inner side of the lower end of the upper barrel section shape-keeping module (3).

2. The barrel end face welding shape-preserving device according to claim 1, characterized in that: The front welding surface shape-keeping module (1) comprises: a front welding surface shape-keeping module fixture (11), a front welding surface shape-keeping module moving slide rail (12) and a front welding surface shape-keeping module bottom lifting platform (13); The bottom lifting platform (13) of the front welding surface shape-keeping module is installed on a workbench, a front welding surface shape-keeping module moving slide rail (12) is arranged at the upper end of the bottom lifting platform (13) of the front welding surface shape-keeping module, and the front welding surface shape-keeping module fixture (11) is slidably installed on the front welding surface shape-keeping module moving slide rail (12).

3. The barrel end face welding shape-preserving device according to claim 1, characterized in that: The lower barrel section shape-keeping module (2) comprises: a lower shape-keeping roller frame support seat (21) and a lower shape-keeping roller frame (22); The lower shape-retaining roller frame support seat (21) is installed on a workbench, and the lower shape-retaining roller frame (22) is installed on the lower shape-retaining roller frame support seat (21). The lower shape-retaining roller frame (22) is provided with a roller.

4. The barrel end face welding shape-preserving device according to claim 1, characterized in that: The upper barrel section shape-keeping module (3) comprises: a lower shape-keeping frame support (31), a lower shape-keeping support frame (32), an upper shape-keeping support frame (33) and an upper shape-keeping roller frame (34); The lower profile-keeping frame pillar (31) is installed on a workbench, the lower profile-keeping support frame (32) is installed on the lower profile-keeping frame pillar (31), the upper profile-keeping support frame (33) and the upper profile-keeping roller frame (34) are installed on the lower profile-keeping support frame (32), and the upper profile-keeping roller frame (34) is located at the inner side of the bottom of the upper profile-keeping support frame (33).

5. The barrel end face welding shape-preserving device according to claim 4, characterized in that: The shape of the lower shape-retaining support frame (32) facing the workbench is compatible with the shape of the barrel section, the shape of the upper shape-retaining support frame (33) facing the workbench is compatible with the shape of the barrel section, and the upper shape-retaining roller frame (34) is provided with rollers.

6. The barrel end face welding shape-preserving device according to claim 1, characterized in that: The welding surface fixture (4) comprises: a fixture frame (41) and a rotary clamping support cylinder (42); The clamp frame (41) is installed on a workbench. The clamp frame (41) is configured as a square frame structure. A plurality of inwardly telescopic rotating clamping support cylinders (42) are distributed around the periphery of the clamp frame (41).

7. The barrel end face welding shape-preserving device according to claim 1, characterized in that: The welding operation table (5) comprises: a front welding surface welding operation table (51) and a rear welding surface welding operation table (52); The front welding surface welding operation table (51) and the rear welding surface welding operation table (52) are located on both sides of the welding surface fixture (4).

8. The barrel end face welding shape-preserving device according to claim 7, characterized in that: The front welding surface welding operation platform (51) comprises: a front welding surface welding operation platform moving base (5101), a front welding surface welding operation platform lifting platform (5102) and a front welding surface welding operation platform welding robot (5103); The front welding surface welding operation table mobile base (5101) can be movably placed on the ground, and the front welding surface welding operation table welding robot (5103) is installed on the front welding surface welding operation table mobile base (5101) through the welding surface welding operation table lifting platform (5102).

9. The barrel end face welding shape-preserving device according to claim 7, characterized in that: The rear welding surface welding operation platform (52) comprises: a rear welding surface welding operation platform lifting platform (5201) and a rear welding surface welding operation platform welding robot (5202); The rear welding surface welding operation table welding robot (5202) is installed on the workbench via the rear welding surface welding operation table lifting platform (5201).

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