Welding aid, segment and method for welding segments

Abstract

This invention provides a welding auxiliary device, a welding method for cylindrical sections and arc-shaped parts, relating to the field of welding technology. The welding auxiliary device is used to assist in the welding of cylindrical sections and arc-shaped parts. The welding auxiliary device includes a support structure and a rounding structure. One end of the rounding structure is connected to the support structure, and the other end of the rounding structure is used to fit against the arc-shaped part during the welding process. The rounding structure is designed to be telescopic. During the welding process, the support structure is fixed on the work platform, and the welding auxiliary device is used to correct the ellipticity of the cylindrical section by adjusting the telescopic length of the rounding structure. It has the advantages of simple installation and low disassembly difficulty, thereby improving production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a welding auxiliary device and a welding method of a cylinder segment and an arc-shaped piece. BACKGROUND

[0002] Welding an arc-shaped piece into the inner wall of a cylinder segment is an important assembly step in the production process of heavy machinery such as nuclear stainless steel container products, but during the welding process of the cylinder segment and the arc-shaped piece, due to the thermal expansion characteristics of the cylinder segment and the arc-shaped piece and the unevenness of the welding heat input, the cylinder segment often appears oval deformation, which not only affects the assembly accuracy of the subsequent parts, but also is difficult to meet the strict product manufacturing tolerance requirements.

[0003] In related art, during the welding process of the cylinder segment and the arc-shaped piece, a circular holding ring auxiliary tool is generally arranged outside the cylinder segment as a welding auxiliary device for ovality control. Since the holding ring auxiliary tool needs to be directly welded on the outer wall of the cylinder segment, the installation difficulty of the holding ring auxiliary tool is high, and after the welding is completed, the holding ring auxiliary tool needs to be cut off to be removed, which has high removal difficulty, thereby reducing the production efficiency.

[0004] Therefore, in the related art, during the welding process of the cylinder segment and the arc-shaped piece, the ovality control of the cylinder segment has high installation and removal difficulty, thereby causing low production efficiency. SUMMARY

[0005] The problem solved by the present application is: during the welding process of the cylinder segment and the arc-shaped piece, how to design a welding auxiliary device with low installation and removal difficulty to control the ovality of the cylinder segment, thereby improving the production efficiency.

[0006] To solve the above problems, the present application provides a welding auxiliary device and a welding method of a cylinder segment and an arc-shaped piece.

[0007] In a first aspect, the present application provides a welding auxiliary device for assisting the welding of a cylinder segment and an arc-shaped piece, the welding auxiliary device comprising a support structure, a roundness correction structure;

[0008] One end of the roundness correction structure is connected with the support structure, and the other end of the roundness correction structure is used to be in close contact with the arc-shaped piece during the welding process of the cylinder segment and the arc-shaped piece.

[0009] The roundness correction structure is arranged to be telescopic; during the welding process of the cylinder segment and the arc-shaped piece, the support structure is fixed on a workbench, and the welding auxiliary device is used to correct the ovality of the cylinder segment by adjusting the telescopic length of the roundness correction structure.

[0010] Optionally, the support structure comprises a first support frame and a second support frame arranged symmetrically, and the roundness correcting structure comprises a first roundness correcting substructure connected to the first support frame and a second roundness correcting substructure connected to the second support frame.

[0011] The first roundness correcting substructure comprises a first telescopic structure and a first pad, wherein one end of the first telescopic structure is fixed to the first support frame, the other end of the first telescopic structure is fixed to one face of the first pad, and the first pad is used to fit with the arc-shaped piece.

[0012] The second roundness correcting substructure comprises a second telescopic structure and a second pad, wherein one end of the second telescopic structure is fixed to the second support frame, the other end of the second telescopic structure is fixed to one face of the second pad, and the second pad is used to fit with the arc-shaped piece.

[0013] Optionally, the first pad and the second pad are made of stainless steel material, the first telescopic structure comprises one or more carbon steel mechanical jacks, and the second telescopic structure comprises one or more carbon steel mechanical jacks.

[0014] Optionally, the first support frame comprises a first movable frame, a first clamping pad and a second clamping pad, wherein the first clamping pad and the second clamping pad are used to be fixed on the work platform, the first movable frame is a door-shaped frame, and two ends of the lower side of the first movable frame are movably connected with the first clamping pad and the second clamping pad respectively.

[0015] The second support frame comprises a second movable frame, a third clamping pad and a fourth clamping pad, wherein the third clamping pad and the fourth clamping pad are used to be fixed on the work platform, the second movable frame is a door-shaped frame, and two ends of the lower side of the second movable frame are movably connected with the third clamping pad and the fourth clamping pad respectively.

[0016] Optionally, the welding auxiliary device further comprises a connecting rod, two ends of the connecting rod are movably connected with the upper end of the first movable frame and the upper end of the second movable frame respectively.

[0017] In a second aspect, the present application provides a welding method of a cylinder segment and an arc-shaped piece, comprising:

[0018] placing the cylinder segment on a work platform and placing the arc-shaped piece on the inner wall welding area of the cylinder segment, wherein the arc-shaped side surface of the cylinder segment is in contact with the work platform;

[0019] installing a welding auxiliary device on the working platform, wherein the welding auxiliary device is the welding auxiliary device according to any one of claims 1 to 5, and the welding auxiliary device comprises a support structure and a roundness correction structure;

[0020] welding the cylinder segment and the arc-shaped piece, and correcting the ovality of the cylinder segment by using the welding auxiliary device during the welding process.

[0021] Optionally, the support structure comprises a first support frame and a second support frame arranged symmetrically, the roundness correction structure comprises a first roundness correction substructure connected to the first support frame and a second roundness correction substructure connected to the second support frame, the first roundness correction substructure comprises a first telescopic structure and a first pad, and the second roundness correction substructure comprises a second telescopic structure and a second pad.

[0022] The installing the welding auxiliary device on the working platform comprises: determining a spacing distance according to the diameter of the cylinder segment; installing the first support frame and the second support frame on the working platform according to the spacing distance; installing the first roundness correction substructure below the first support frame and installing the second roundness correction substructure below the second support frame; adjusting the length of the first telescopic structure in the first roundness correction substructure so that the first pad in the first roundness correction substructure is in contact with the arc-shaped piece; and adjusting the length of the second telescopic structure in the second roundness correction substructure so that the second pad in the second roundness correction substructure is in contact with the arc-shaped piece.

[0023] Optionally, the welding auxiliary device further comprises a connecting rod, the first support frame comprises a first movable frame, a first clamping pad and a second clamping pad, and the second support frame comprises a second movable frame, a third clamping pad and a fourth clamping pad.

[0024] The installing the first support frame and the second support frame on the working platform according to the spacing distance comprises: fixing the first clamping pad and the second clamping pad on the working platform, fixing the third clamping pad and the fourth clamping pad on the working platform, the distance between the first clamping pad and the third clamping pad being the spacing distance, and the distance between the second clamping pad and the fourth clamping pad being the spacing distance; adjusting the relative angle of the first movable frame and the second movable frame; and fixing the two ends of the connecting rod to the upper end of the first movable frame and the upper end of the second movable frame, respectively.

[0025] Optionally, the welding of the cylinder segment and the arc-shaped piece uses the welding auxiliary device to correct the ellipticity of the cylinder segment during the welding process, including: dividing the welding area of the cylinder segment and the arc-shaped piece into N welding sub-areas, and sequentially performing welding operation on the N welding sub-areas according to a preset welding sequence; after completing the welding operation of each welding sub-area, measuring the ellipticity of the cylinder segment; and in the case that the ellipticity meets a preset condition, adjusting the extension length of the roundness correction structure to correct the ellipticity of the cylinder segment.

[0026] Optionally, the welding of the cylinder segment and the arc-shaped piece uses the welding auxiliary device to correct the ellipticity of the cylinder segment during the welding process, including: dividing the welding area of the cylinder segment and the arc-shaped piece into N welding sub-areas, and sequentially performing welding operation on the N welding sub-areas according to a preset welding sequence; after completing the welding operation of each welding sub-area, measuring the ellipticity of the cylinder segment; and in the case that the ellipticity meets a preset condition, adjusting the extension length of the roundness correction structure to correct the ellipticity of the cylinder segment.

[0027] The welding auxiliary device provided in the present application includes a supporting structure and a roundness correction structure, and does not need to be welded to the outer wall of the cylinder segment, but only needs to be placed on the working platform, the position is adjusted and the extension length of the roundness correction structure is adjusted, so that the roundness correction structure is attached to the arc-shaped piece, and the control and adjustment of the ellipticity of the cylinder segment can be realized by extending the roundness correction structure during the welding process. The welding auxiliary device is simple to install, and after the welding of the arc-shaped piece and the cylinder segment is completed, the auxiliary device can be removed, and the welding auxiliary device does not need to be cut. Compared with the circular holding ring auxiliary device arranged outside the cylinder segment, the welding auxiliary device in the embodiment has the advantages of simple installation and low dismounting difficulty, thereby improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 FIG. 1 is a schematic view of the welding of the cylinder segment and the arc-shaped piece in the embodiment of the present application;

[0029] Figure 2 FIG. 3 is a structural schematic view of the welding auxiliary device in the embodiment of the present application;

[0030] Figure 3 FIG. 5 is a schematic view of the welding auxiliary device in the embodiment of the present application during the welding process of the cylinder segment and the arc-shaped piece;

[0031] Figure 4 FIG. 7 is a structural schematic view of the welding auxiliary device in another embodiment of the present application;

[0032] Figure 5 FIG. 9 is a structural schematic view of the welding auxiliary device in still another embodiment of the present application;

[0033] Figure 6 Flow chart of the welding method of the cylinder segment and the arc-shaped member in the embodiment of the present application;

[0034] Figure 7 Schematic diagram of the installation of the welding auxiliary device when welding the cylinder segment and the arc-shaped member in the embodiment of the present application;

[0035] Figure 8 Schematic diagram of the welding shrinkage deformation of the cylinder segment in the welding process in the embodiment of the present application;

[0036] Figure 9 Welding area of the cylinder segment and the arc-shaped member in the embodiment of the present application;

[0037] Figure 10 Schematic diagram of the welding sub-area in the embodiment of the present application.

[0038] Explanation of reference signs:

[0039] 1, welding auxiliary device; 11, support structure; 111, first support frame; 1111, first movable frame; 1112, first clamping block; 1113, second clamping block; 112, second support frame; 1121, second movable frame; 1122, third clamping block; 1123, fourth clamping block; 12, roundness correction structure; 121, first roundness correction sub-structure; 1211, first telescopic structure; 1212, first clamping block; 122, second roundness correction sub-structure; 1221, second telescopic structure; 1222, second clamping block; 13, connecting rod; 2, cylinder segment; 21, long weld; 22, straight section weld; 3, arc-shaped member; 4, working platform. DETAILED DESCRIPTION

[0040] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. Although some embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms, and should not be interpreted as being limited to the embodiments described herein, on the contrary, these embodiments are provided to make the present application more thorough and complete. It should be understood that the drawings and embodiments of the present application are only for illustrative purposes, and are not intended to limit the scope of protection of the present application.

[0041] It should be noted that the meanings of the Y-axis and the X-axis described below are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present application.

[0042] The term "include" and variations thereof, as used in this document, mean "to include, without limitation"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optional" means "optional in at least one embodiment". Related terms shall be construed accordingly. It should be noted that "a" or "an" entity as used herein means "one or more" entities. By the term "exemplary" or "one embodiment" or "some embodiments" as used herein, it is meant "one or more embodiments".

[0043] It should be noted that the modification of "one" or "multiple" mentioned in the present application is illustrative and not restrictive, and those skilled in the art should understand that unless the context clearly indicates otherwise, it should be understood as "one or more".

[0044] The schematic diagram of the welding of the cylinder segment and the arc-shaped piece is shown in Figure 1 The arc-shaped piece is placed on the inner wall of the cylinder segment, and the arc-shaped piece is tightly attached to the inner wall of the cylinder segment and fixed by welding. During the welding of the arc-shaped piece and the cylinder segment, the thermal expansion characteristics of the cylinder segment and the arc-shaped piece and the unevenness of the welding heat input often cause the cylinder segment to be oval deformed.

[0045] In the related art, a circular holding ring auxiliary tool is arranged outside the cylinder segment as a welding auxiliary device for ovality control. Since the holding ring auxiliary tool needs to be directly attached to the outer wall of the cylinder segment, the holding ring auxiliary tool needs to match the diameter of the cylinder segment, and different sizes of holding ring auxiliary tools are needed for cylinder segments of different diameters. It can be seen that a single holding ring auxiliary tool in the related art is difficult to be applied to cylinder segments of different sizes, and the holding ring auxiliary tool must be tightly attached to the outer wall of the cylinder segment during installation, which is difficult to install. If the holding ring auxiliary tool is installed on the outer wall of the cylinder segment by welding, oval deformation of the cylinder segment will inevitably occur, and the holding ring auxiliary tool needs to be cut off after the welding of the cylinder segment and the arc-shaped piece is completed to be removed, which is difficult to remove, thereby reducing the production efficiency.

[0046] In view of the problems in the above related art, the present application provides a welding auxiliary device and a welding method for a cylinder segment and an arc-shaped piece.

[0047] As shown in Figure 2 The welding auxiliary device 1 provided by the embodiment of the present application is used to assist the welding of the cylinder segment 2 and the arc-shaped piece 3, and the welding auxiliary device 1 comprises a support structure 11 and a roundness correction structure 12.

[0048] One end of the roundness correction structure 12 is connected with the support structure 11, and the other end of the roundness correction structure 12 is used to be attached with the arc-shaped piece 3 during the welding of the cylinder segment 2 and the arc-shaped piece 3.

[0049] The rounding structure 12 is designed to be telescopic; during the welding process of the cylindrical section 2 and the arc-shaped part 3, the support structure 11 is fixed on the working platform 4, and the welding auxiliary device 1 is used to correct the ellipticity of the cylindrical section 2 by adjusting the telescopic length of the rounding structure 12.

[0050] Specifically, this embodiment provides a welding auxiliary device 1, such as... Figure 2 The supporting structure 11 and the rounding structure 12 are shown, with one end of the rounding structure 12 connected to the supporting structure 11.

[0051] Figure 3 A schematic diagram illustrating the use of welding auxiliary device 1 in the welding process of cylindrical section 2 and arc-shaped component 3, as shown below. Figure 3 As shown, during the welding process of the cylindrical section 2 and the arc-shaped part 3, the support structure 11 in the welding auxiliary device 1 is fixed on the working platform 4 to provide stable support for the rounding structure 12. The welding auxiliary device 1 does not shift during the welding process. One end of the rounding structure 12 is connected to the support frame, while the other end of the rounding structure 12 is adjusted by the expansion and contraction of the rounding structure 12 during the welding process of the cylindrical section 2 and the arc-shaped part 3 so as to fit with the arc-shaped part 3.

[0052] During the welding process of the arc-shaped part 3 and the cylindrical section 2, welding shrinkage deformation will occur, causing the ellipticity of the cylindrical section 2 to change. However, after the welding auxiliary device 1 is set up, if the cylindrical section 2 shrinks, the rounding structure 12 in the welding auxiliary device 1 can be extended outward to correct the ellipticity change of the cylindrical section 2 caused by welding.

[0053] The welding auxiliary device 1 provided in this embodiment does not need to be welded to the outer wall of the cylindrical section 2. It is only necessary to place the support structure 11 on the working platform 4, adjust its position and adjust the extension length of the rounding structure 12 so that the rounding structure 12 fits with the arc-shaped part 3. During the welding process, the ellipticity of the cylindrical section 2 can be controlled and adjusted by extending the rounding structure 12. The installation is simple. After the welding of the arc-shaped part 3 and the cylindrical section 2 is completed, the auxiliary device can be removed to remove it. There is no need to cut the welding auxiliary device 1. Compared with setting a circular retaining device on the outside of the cylindrical section 2, the welding auxiliary device 1 in this embodiment has the advantages of simple installation and low removal difficulty, thereby improving production efficiency.

[0054] Optionally, such as Figure 4 As shown, the support structure 11 includes a first support frame 111 and a second support frame 112 arranged symmetrically, and the rounding structure 12 includes a first rounding substructure 121 connected to the first support frame 111 and a second rounding substructure 122 connected to the second support frame 112.

[0055] The first roundness correction substructure 121 comprises a first telescopic structure 1211 and a first pad 1212, wherein one end of the first telescopic structure 1211 is fixed to the first support frame 111, the other end of the first telescopic structure 1211 is fixed to one face of the first pad 1212, and the first pad 1212 is used to be attached to the arc-shaped piece 3.

[0056] The second roundness correction substructure 122 comprises a second telescopic structure 1221 and a second pad 1222, wherein one end of the second telescopic structure 1221 is fixed to the second support frame 112, the other end of the second telescopic structure 1221 is fixed to one face of the second pad 1222, and the second pad 1222 is used to be attached to the arc-shaped piece 3.

[0057] Specifically, the support structure 11 is divided into two parts: the first support frame 111 and the second support frame 112, and the roundness correction structure 12 is also divided into two parts: the first roundness correction substructure 121 and the second roundness correction substructure 122, wherein the first support frame 111 and the first roundness correction substructure 121 are connected as a whole, and the second support frame 112 and the second roundness correction substructure 122 are connected as a whole.

[0058] Each roundness correction substructure comprises a telescopic structure and a pad, i.e., the first roundness correction substructure 121 comprises a first telescopic structure 1211 and a first pad 1212, and the second roundness correction substructure 122 comprises a second telescopic structure 1221 and a second pad 1222. The telescopic structure applies an outward force to the cylinder segment 2 to correct the roundness of the cylinder segment 2 by elongation. The pad is connected to the telescopic structure and attached to the arc-shaped piece 3, and the arc-shaped piece 3 is attached to the cylinder segment 2, so that the cylinder segment 2 is uniformly stressed in the width direction of the arc-shaped piece 3 during the roundness correction process of the telescopic structure applying the outward force.

[0059] Optionally, the first pad 1212 and the second pad 1222 are made of stainless steel material, the first telescopic structure 1211 comprises one or more carbon steel mechanical jacks, and the second telescopic structure 1221 comprises one or more carbon steel mechanical jacks.

[0060] Specifically, the first pad 1212 and the second pad 1222 are made of stainless steel material, the telescopic structure is made of one or more carbon steel mechanical jacks, the carbon steel mechanical jacks can be telescopic and rigid, and can provide an external force to prevent the cylinder segment 2 from shrinking inward or to expand the cylinder segment 2 outward to correct the roundness of the cylinder segment 2 when the cylinder segment 2 shrinks inward.

[0061] However, the mechanical jack is made of carbon steel, and direct contact with the arc-shaped piece 3 will cause pollution to the arc-shaped piece 3. Since the gasket made of stainless steel is connected between the jack and the arc-shaped piece 3, the contact between the carbon steel mechanical jack and the arc-shaped piece 3 is isolated, and the pollution of the arc-shaped piece 3 is avoided. Especially when the arc-shaped piece 3 is made of stainless steel, it is ensured that the arc-shaped piece 3 is not polluted by the carbon steel material.

[0062] Preferably, the length of the stainless steel gasket is consistent with the width of the arc-shaped piece 3.

[0063] Optionally, the first support frame 111 comprises a first movable frame 1111 and two butt gaskets, wherein the first support frame 111 comprises a first movable frame 1111, a first butt gasket 1112 and a second butt gasket 1113, wherein the first butt gasket 1112 and the second butt gasket 1113 are used to be fixed on the working platform 4, and the first movable frame 1111 is a door-shaped frame, and the two ends of the lower side of the first movable frame 1111 are movably connected with the first butt gasket 1112 and the second butt gasket 1113 respectively.

[0064] The second support frame 112 comprises a second movable frame 1121, a third butt gasket 1122 and a fourth butt gasket 1123, wherein the third butt gasket 1122 and the fourth butt gasket 1123 are used to be fixed on the working platform 4, and the second movable frame 1121 is a door-shaped frame, and the two ends of the lower side of the second movable frame 1121 are movably connected with the third butt gasket 1122 and the fourth butt gasket 1123 respectively.

[0065] Specifically, the first support frame 111 and the second support frame 112 are the same in structure, and only differ in the position placed in the welding process of the cylinder segment 2 and the arc-shaped piece 3. One support frame comprises a movable frame and two butt gaskets, wherein the butt gaskets are used to be fixed on the working platform 4, and specifically, the butt gaskets can be fixed on the working platform 4 by using gasket fixing bolts to realize the fixation of the first support frame 111 and the second support frame 112. The movable frame is movably connected with the two butt gaskets, for example, a sliding frame can be hinged with the two butt gaskets, and the extension direction of the hinge shaft is the same as the axial direction of the cylinder segment 2. The movable connection facilitates the adjustment of the relative angle of the two support frames, so that the welding auxiliary device 1 can adapt to cylinder segments 2 of different diameters.

[0066] Optionally, as shown in Figure 5 The welding auxiliary device 1 further comprises a connecting rod 13, and the two ends of the connecting rod 13 are movably connected with the upper end of the first movable frame 1111 and the upper end of the second movable frame 1121 respectively.

[0067] The connecting rod 13 connects the first support frame and the second support frame into a whole, the connecting rod 13 can be connected with the movable frame through a connecting rod 13 bolt, when the connecting rod 13 bolt and the pad fixing bolt are not tightened, the first movable frame 1111, the second movable frame 1121 and the connecting rod 13 can rotate, the installer manually adjusts to determine the position of the first movable frame 1111, the second movable frame 1121 and the connecting rod 13, and after the position is determined, the connecting rod 13 bolt and the pad fixing bolt are tightened to fix the position of the movable frame.

[0068] As shown in Figure 6 , the present application also provides a welding method of the cylinder section 2 and the arc-shaped piece 3, comprising:

[0069] Step S1: placing the cylinder section 2 on the work platform 4, and placing the arc-shaped piece 3 on the inner wall welding area of the cylinder section 2, wherein the arc-shaped side of the cylinder section 2 is in contact with the work platform 4.

[0070] Specifically, when the welding of the cylinder section 2 and the arc-shaped piece 3 is needed, it is completed on the work platform 4 provided as Figure 7 , before welding, the cylinder section 2 is placed on the work platform 4, when placing the cylinder section 2, as shown in Figure 7 , the arc-shaped side of the cylinder section 2 is in contact with the work platform 4, and the position of the cylinder section 2 welding the arc-shaped piece 3 (i.e. the inner wall welding area) corresponds to the downward arc-shaped outer side in contact with the work platform 4.

[0071] After placing the cylinder section 2 on the work platform 4, the arc-shaped piece 3 is placed in the inner wall welding area of the cylinder section 2, preferably, symmetrical spot welding can be performed at two or more points of the welding seam between the arc-shaped piece 3 and the inner wall of the cylinder section 2, the arc-shaped piece 3 is preliminarily fixed, so that the position of the arc-shaped piece 3 remains unchanged during subsequent installation of the welding auxiliary device 1, it should be noted that spot welding has little effect on the deformation of the cylinder section 2, and preliminary fixation of the arc-shaped piece 3 will not cause excessive deformation of the cylinder section 2.

[0072] Step S2: installing the welding auxiliary device 1 on the work platform 4, wherein the welding auxiliary device 1 is the welding auxiliary device 1 as described above, and the welding auxiliary device 1 comprises a support structure 11 and a roundness correction structure 12.

[0073] Specifically, after placing the arc-shaped piece 3 in the inner welding area of the cylinder section 2, as shown in Figure 7 , the welding auxiliary device 1 as described above is installed, so that the welding auxiliary device 1 is used to correct the ovality of the cylinder section 2 during subsequent welding.

[0074] Step S3: welding the cylinder section 2 and the arc-shaped piece 3, and using the welding auxiliary device 1 to correct the ovality of the cylinder section 2 during welding.

[0075] Specifically, the cylinder segment 2 and the arc-shaped piece 3, the cylinder segment 2 will produce welding shrinkage deformation in the welding process, as shown in the figure, the long axis of the ellipse will generally appear in the direction opposite to the arc-shaped piece 3 (corresponding to the Z-axis direction in the figure) Figure 8 Figure 8 The short axis of the ellipse will appear in the direction perpendicular to the opposite direction (corresponding to the Y-axis direction in the figure), thereby causing the ovality of the cylinder segment 2 to change, and the welding auxiliary device 1 is used to correct the ovality of the cylinder segment 2 in the welding process. Figure 8

[0076] It should be noted that the ovality = a-b, where a is the long axis of the ellipse, and b is the short axis of the ellipse, and the circle is a special ellipse, and the ovality of the circle is 0, and the ovality of the cylinder segment 2 changes and is no longer 0, and the correction of the ovality of the cylinder segment 2 is the process of adjusting the cylinder segment 2 to make the ovality of the cylinder segment 2 approach 0.

[0077] The welding auxiliary device 1 expands the cylinder segment 2 outward by adjusting the extension length of the roundness correction structure 12 during the welding process of the cylinder segment 2 and the arc-shaped piece 3, reduces the welding shrinkage deformation of the cylinder segment 2 in the welding process, and corrects the ovality of the cylinder segment 2.

[0078] In this embodiment, when the welding of the cylinder segment 2 and the arc-shaped piece 3 is needed, the cylinder segment 2 is placed on the workbench 4, the arc-shaped piece 3 is placed in the inner welding area of the cylinder segment 2, and the welding auxiliary device 1 is installed. The ovality of the cylinder segment 2 is corrected by using the welding auxiliary device 1 in the welding process, which reduces the influence of the ovality change on the assembly accuracy of the subsequent parts in the welding process. The welding auxiliary device 1 in this embodiment does not need to be welded to the outer wall of the cylinder segment 2, only needs to be placed on the workbench 4, adjusts the position and adjusts the extension length of the roundness correction structure 12, and makes the roundness correction structure 12 fit with the arc-shaped piece 3. By elongating the roundness correction structure 12 during the welding process, the ovality of the cylinder segment 2 can be controlled and adjusted, which has the advantages of simple installation and low difficulty in removal, thereby improving the production efficiency.

[0079] Optionally, the support structure 11 includes a first support frame 111 and a second support frame 112 arranged symmetrically, the roundness correction structure 12 includes a first roundness correction sub-structure 121 connected to the first support frame 111 and a second roundness correction sub-structure 122 connected to the second support frame 112, the first roundness correction sub-structure 121 includes a first extension structure 1211 and a first pad 1212, and the second roundness correction sub-structure 122 includes a second extension structure 1221 and a second pad 1222.

[0080] ​​The welding auxiliary device 1 is installed on the working platform 4, including: determining the interval distance according to the diameter of the cylinder segment 2; installing the first support frame 111 and the second support frame 112 on the working platform 4 according to the interval distance; installing the first roundness correction substructure 121 below the first support frame 111 and installing the second roundness correction substructure 122 below the second support frame 112; adjusting the length of the first telescopic structure 1211 in the first roundness correction substructure 121 so that the first pad 1212 in the first roundness correction substructure 121 is attached to the arc-shaped part 3; and adjusting the length of the second telescopic structure 1221 in the second roundness correction substructure 122 so that the second pad 1222 in the second roundness correction substructure 122 is attached to the arc-shaped part 3.

[0081] Specifically, when the auxiliary welding tool is installed, the fixed positions of the first support frame and the second support frame on the working platform 4 are determined first, the distance between the first support frame and the second support frame is the interval distance, which is determined by the diameter of the cylinder segment 2, and the two support frames are in the centripetal direction. After the first support frame 111 and the second support frame 112 are fixed, the first roundness correction substructure 121 and the second roundness correction substructure 122 are installed, the first roundness correction substructure 121 is installed below the first support frame 111, and the second roundness correction substructure 122 is installed below the second support frame 112. Then the length of the first telescopic structure 1211 and the second telescopic structure 1221 is adjusted so that the first pad 1212 and the second pad 1222 are attached to the arc-shaped part 3.

[0082] Preferably, the first pad 1212 and the second pad 1222 have the same width as the arc-shaped part 3.

[0083] Optionally, the welding auxiliary device 1 further comprises a connecting rod 13, the first support frame 111 comprises a first movable frame 1111, a first clamping pad 1112 and a second clamping pad 1113, and the second support frame 112 comprises a second movable frame 1121, a third clamping pad 1122 and a fourth clamping pad 1123.

[0084] The first support frame 111 and the second support frame 112 are installed on the work platform 4 at the interval distance, including: fixing the first and second combined pads 1112 and 1113 on the work platform 4, fixing the third and fourth combined pads 1122 and 1123 on the work platform 4, the distance between the first combined pad 1112 and the third combined pad 1122 is the interval distance, and the distance between the second combined pad 1113 and the fourth combined pad 1123 is the interval distance; adjusting the relative angle of the first movable frame 1111 and the second movable frame 1121; and fixing the two ends of the connecting rod 13 on the upper end of the first movable frame 1111 and the upper end of the second movable frame 1121 respectively.

[0085] Specifically, the first support frame 111 includes a movable frame and two combined pads, that is, the first support frame 111 includes a first movable frame 1111, a first combined pad 1112 and a second combined pad 1113, and the second support frame 112 is similar in structure to the first support frame 111 and also includes a movable frame and two combined pads, that is, the second support frame 112 includes a second movable frame 1121, a third combined pad 1122 and a fourth combined pad 1123.

[0086] When fixing the first support frame 111 and the second support frame 112, the combined pads of each support frame are fixed first, and the specific fixing positions are that the first combined pad 1112 and the second combined pad 1113 are fixed on the two sides of the barrel section 2, the third combined pad 1122 and the fourth combined pad 1123 are fixed on the two sides of the barrel section 2, and the distance between the first combined pad 1112 and the third combined pad 1122 is the interval distance, and the distance between the second combined pad 1113 and the fourth combined pad 1123 is the interval distance.

[0087] The movable frame is movably connected with the corresponding combined pad, and the movable frame can adjust the angle. Preferably, the movable frame and the combined pad are connected by a frame fixing bolt, and when the frame fixing bolt is not tightened, the movable frame can move relative to the combined pad, that is, the relative angle between the movable frames can be adjusted, so that the two movable frames are symmetrically arranged and are both in the centripetal direction.

[0088] After adjusting the relative angle of the two movable frames, the connecting rod 13 is fixed on the upper end of the first movable frame 1111 and the upper end of the second movable frame 1121 to realize the connection of the two movable frames and further maintain the stability of the movable frames.

[0089] Optionally, the barrel section 2 and the arc-shaped member 3 are welded, and the welding auxiliary device 1 is used to correct the ovality of the barrel section 2 during the welding process, including:

[0090] The welding area of the cylinder segment 2 and the arc-shaped piece 3 is divided into N welding sub-areas, and welding operations are sequentially performed on the N welding sub-areas according to a preset welding sequence;

[0091] After each welding operation of the welding sub-area is completed, the ellipticity of the cylinder segment 2 is measured;

[0092] When the ellipticity meets a preset condition, the extension length of the roundness correction structure 12 is adjusted to correct the ellipticity of the cylinder segment 2.

[0093] Specifically, the welding area of the cylinder segment 2 and the arc-shaped piece 3 includes a long weld 21 along the arc length direction and a flat section weld 22, as shown in the figure. Figure 9

[0094] The welding area of the cylinder segment 2 and the arc-shaped piece 3 is divided into N welding sub-areas, and welding operations are sequentially performed on the N welding sub-areas according to a preset welding sequence;

[0095] The N welding sub-areas obtained by the division are sequentially welded according to a preset welding sequence, the ellipticity of the cylinder segment 2 is measured after each welding sub-area is welded, and the extension length of the roundness correction structure 12 in the welding auxiliary device 1 is adjusted to correct the ellipticity of the cylinder segment 2 when the ellipticity meets a preset condition.

[0096] The preset condition that the ellipticity meets can be that the ellipticity is not 0, or that the ellipticity is greater than a preset threshold value. For example, when it is required to control the ellipticity within 2 mm, the preset threshold value can be set to 2 mm, and when the difference between the major axis and the minor axis of the ellipticity is greater than 2 mm, it is determined that the ellipticity meets the preset condition.

[0097] Optionally, the welding area of the cylinder segment 2 and the arc-shaped piece 3 is divided into N welding sub-areas, and welding operations are sequentially performed on the N welding sub-areas according to a preset welding sequence, including:

[0098] The arc-shaped piece 3 is divided into three segments along the arc length direction to obtain N welding sub-areas, wherein the N welding sub-areas include two intermediate segment welding sub-areas, four edge segment welding sub-areas, and two flat segment welding sub-areas; and each layer sequentially performs welding operations on the N welding sub-areas in the order of the intermediate segment welding sub-areas, the edge segment welding sub-areas, and the flat segment welding sub-areas.

[0099] ​When the piece is divided into three sections along the arc length direction, two intermediate section welding sub-areas, four edge section welding sub-areas and two flat section welding sub-areas are obtained, a total of eight welding sub-areas, as shown in Figure 10 Figure 10 The middle weld 1 and the weld 2 correspond to the two intermediate section welding sub-areas, the weld 3, the weld 4, the weld 5 and the weld 6 correspond to the four edge section welding sub-areas, and the weld 7 and the weld 8 correspond to the two flat section welding sub-areas. The welding operation is performed according to the welding sequence of the intermediate section welding sub-area, the edge section welding sub-area and the flat section welding sub-area (i.e. the preset welding sequence).

[0100] The welding sequence is exemplarily: the weld 1, the weld 2, the weld 3, the weld 4, the weld 5, the weld 6, the weld 7 and the weld 8. It should be noted that the welding sequence of the weld 1 and the weld 2 can be interchanged, the welding sequence of the weld 3 and the weld 4 can be interchanged, the welding sequence of the weld 5 and the weld 6 can be interchanged, and the welding sequence of the weld 7 and the weld 8 can be interchanged.

[0101] It should be noted that multi-layer welding is performed on each welding sub-area, single-layer welding is performed on all welding sub-areas according to the preset welding sequence, and then the next layer of welding is performed according to the preset welding sequence.

[0102] It should be noted that the arc length direction can be divided into more sections, such as four sections, five sections, etc. The welds in the arc length direction are welded first, and then the flat section welds (i.e. the flat section welding sub-areas) are welded.

[0103] Although the present application is disclosed as above, the protection scope of the present application is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and these changes and modifications will fall within the protection scope of the present application.​

Claims

1. A welding auxiliary device, characterized in that, The welding auxiliary device (1) is used to assist in the welding of the cylindrical section (2) and the arc-shaped part (3). The welding auxiliary device (1) includes a support structure (11) and a rounding structure (12). One end of the rounding structure (12) is connected to the support structure (11), and the other end of the rounding structure (12) is used to fit with the arc-shaped part (3) during the welding process of the cylindrical section (2) and the arc-shaped part (3); The rounding structure (12) is configured to be telescopic; during the welding process of the cylindrical section (2) and the arc-shaped part (3), the support structure (11) is fixed on the working platform (4), and the welding auxiliary device (1) is used to correct the ellipticity of the cylindrical section (2) by adjusting the telescopic length of the rounding structure (12); The support structure (11) includes a first support frame (111) and a second support frame (112) arranged symmetrically. The rounding structure (12) includes a first rounding substructure (121) connected to the first support frame (111) and a second rounding substructure (122) connected to the second support frame (112). The first round substructure (121) includes a first telescopic structure (1211) and a first pad (1212), wherein one end of the first telescopic structure (1211) is fixed to the first support frame (111), and the other end of the first telescopic structure (1211) is fixed to one side of the first pad (1212), and the first pad (1212) is used to fit against the arc-shaped part (3); The second round substructure (122) includes a second telescopic structure (1221) and a second pad (1222), wherein one end of the second telescopic structure (1221) is fixed to the second support frame (112), and the other end of the second telescopic structure (1221) is fixed to one surface of the second pad (1222), and the second pad (1222) is used to fit against the arc-shaped part (3); The first support frame (111) includes a first movable frame (1111), a first mating pad (1112), and a second mating pad (1113). The first mating pad (1112) and the second mating pad (1113) are used to fix the work platform (4). The first movable frame (1111) is a portal frame. The two ends of the lower side of the first movable frame (1111) are movably connected to the first mating pad (1112) and the second mating pad (1113), respectively. The second support frame (112) includes a second movable frame (1121), a third mounting block (1122), and a fourth mounting block (1123), wherein the third mounting block (1122) and the fourth mounting block (1123) are used to fix the work platform (4), the second movable frame (1121) is a portal frame, and the two ends of the lower side of the second movable frame (1121) are movably connected to the third mounting block (1122) and the fourth mounting block (1123) respectively; The welding auxiliary device (1) further includes a connecting rod (13), the two ends of which are movably connected to the upper end of the first movable frame (1111) and the upper end of the second movable frame (1121), respectively.

2. The welding auxiliary device according to claim 1, characterized in that, The first pad (1212) and the second pad (1222) are made of stainless steel. The first telescopic structure (1211) includes one or more carbon steel mechanical jacks, and the second telescopic structure (1221) includes one or more carbon steel mechanical jacks.

3. A welding method for a cylindrical section and an arc-shaped component, characterized in that, include: Place the cylindrical section (2) on the working platform (4) and place the arc-shaped part (3) on the inner wall welding area of ​​the cylindrical section (2), wherein the arc-shaped side of the cylindrical section (2) is in contact with the working platform (4); A welding auxiliary device (1) is installed on the working platform (4), wherein the welding auxiliary device (1) is the welding auxiliary device (1) as described in any one of claims 1 to 2, and the welding auxiliary device (1) includes a support structure (11) and a rounding structure (12). The cylindrical section and the arc-shaped part (3) are welded together, and the ellipticity of the cylindrical section (2) is corrected by the welding auxiliary device (1) during the welding process.

4. The welding method for the cylindrical section and the arc-shaped component according to claim 3, characterized in that, The support structure (11) includes a first support frame (111) and a second support frame (112) arranged symmetrically. The rounding structure (12) includes a first rounding substructure (121) connected to the first support frame (111) and a second rounding substructure (122) connected to the second support frame (112). The first rounding substructure (121) includes a first telescopic structure (1211) and a first pad (1212). The second rounding substructure (122) includes a second telescopic structure (1221) and a second pad (1222). The installation of the welding auxiliary device (1) on the working platform (4) includes: The interval distance is determined according to the diameter of the cylindrical section (2); The first support frame (111) and the second support frame (112) are installed on the working platform (4) at the intervals specified. The first alignment substructure (121) is installed under the first support frame (111), and the second alignment substructure (122) is installed under the second support frame (112); Adjust the length of the first telescopic structure (1211) in the first rounding substructure (121) so that the first pad (1212) in the first rounding substructure (121) fits against the arc-shaped part (3); Adjust the length of the second telescopic structure (1221) in the second round substructure (122) so that the second pad (1222) in the second round substructure (122) fits against the arc-shaped part (3).

5. The welding method for the cylindrical section and the arc-shaped component according to claim 4, characterized in that, The welding auxiliary device (1) further includes a connecting rod (13). The first support frame (111) includes a first movable frame (1111), a first mating block (1112) and a second mating block (1113). The second support frame (112) includes a second movable frame (1121), a third mating block (1122) and a fourth mating block (1123). The installation of the first support frame (111) and the second support frame (112) on the working platform (4) at the specified interval includes: The first mating pad (1112) and the second mating pad (1113) are fixed on the work platform (4), and the third mating pad (1122) and the fourth mating pad (1123) are fixed on the work platform (4). The distance between the first mating pad (1112) and the third mating pad (1122) is the interval distance, and the distance between the second mating pad (1113) and the fourth mating pad (1123) is the interval distance. Adjust the relative angle between the first movable frame (1111) and the second movable frame (1121); The two ends of the connecting rod (13) are respectively fixed to the upper end of the first movable frame (1111) and the upper end of the second movable frame (1121).

6. The welding method for the cylindrical section and the arc-shaped component according to claim 3, characterized in that, The welding of the cylindrical section (2) and the arc-shaped component (3) includes correcting the ellipticity of the cylindrical section (2) using the welding auxiliary device (1) during the welding process, comprising: The welding areas of the cylindrical section (2) and the arc-shaped part (3) are divided into N welding sub-areas, and welding operations are performed on the N welding sub-areas in sequence according to the preset welding order; After each welding operation of the welding sub-region is completed, the ellipticity of the cylinder section (2) is measured; When the ellipticity meets the preset conditions, the extension length of the rounding structure (12) is adjusted to correct the ellipticity of the cylindrical section (2).

7. The welding method for the cylindrical section and the arc-shaped component according to claim 6, characterized in that, The step of dividing the welding area of ​​the cylindrical section (2) and the arc-shaped component (3) into N welding sub-areas, and performing welding operations on the N welding sub-areas in sequence according to a preset welding order, includes: The arc-shaped component (3) is divided into three segments along the arc length direction to obtain N welding sub-regions, wherein the N welding sub-regions include 2 middle segment welding sub-regions, 4 edge segment welding sub-regions and 2 straight segment welding sub-regions. Each layer performs welding operations on N welding sub-regions in the order of the middle section welding sub-region, the edge section welding sub-region, and the straight section welding sub-region.

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