Welding method

Abstract

The invention relates to the technical field of steel frame welding, and discloses a welding method which comprises the following steps: arranging at least two first connecting pieces at intervals; at least one second connecting piece is welded between every two adjacent first connecting pieces, one end of each second connecting piece is welded to one first connecting piece, after a preset time interval, the other end of each second connecting piece is welded to the other adjacent first connecting piece, and the preset time is longer than or equal to four hours. According to the method, after one end of the second connecting piece is welded, the other end of the second connecting piece is welded at the preset time interval, so that thermal stress and deformation of the welding end can be effectively released, residual stress is eliminated, the welding quality and mechanical property between the first connecting piece and the second connecting piece are improved, and it is ensured that the overall geometrical shape of the structure is kept unchanged; the overall stability and safety of the structure are improved; the service life is prolonged; and the residual stress caused by welding is eliminated by spacing the preset time, and the method is simple and easy to implement.

Description

Technical Field

[0001] The invention relates to the technical field of steel frame welding, and in particular to a welding method. Background Art

[0002] The frame-core tube structure is a force-bearing system with steel columns and steel beams surrounding the outer periphery, and a tube structure in the middle. The frame-core tube structure is usually used in high-rise building structures, such as elevator shafts.

[0003] In the prior art, when steel columns and steel beams are welded to form a frame structure, in the horizontal direction, steel beams are welded from the middle steel column to both sides, or from the steel columns on both sides to the middle; in the vertical direction, steel beams are welded from bottom to top along the steel columns. During the welding process, generally one end of the steel beam is first welded to a steel column, and then the other end of the steel beam is welded to another adjacent steel column. This will cause residual stress and residual deformation in the steel column and the steel beam during the welding process, which seriously affects the mechanical properties of the frame structure. Summary of the invention

[0004] In view of this, the present invention provides a welding method to solve the problem that residual stress and residual deformation are generated in steel columns and steel beams during the welding process, which seriously affects the mechanical properties of the frame structure.

[0005] The present invention provides a welding method, comprising the following steps:

[0006] At least two first connecting members are arranged at intervals;

[0007] At least one second connecting member is welded between two adjacent first connecting members, wherein one end of the second connecting member is first welded to one of the first connecting members, and then the other end of the second connecting member is welded to another adjacent first connecting member after a preset time interval, and the preset time is greater than or equal to four hours.

[0008] Beneficial effect: by welding one end of the second connecting piece and then welding the other end after a preset time, the welding end can be fully cooled within the preset time, thermal stress and deformation can be effectively released, and residual stress can be eliminated, thereby improving the welding quality and mechanical properties between the first connecting piece and the second connecting piece, improving the installation accuracy, ensuring that the overall geometric shape of the structure remains unchanged, and improving the overall stability, safety and service life of the structure; and by eliminating the residual stress caused by welding after a preset time, the method is simple, easy and low-cost.

[0009] In an optional embodiment, the first connecting members are provided with at least three;

[0010] Welding at least one second connecting member between two adjacent first connecting members comprises:

[0011] The second connecting pieces are welded sequentially from the first connecting piece at the edge to the first connecting piece in the middle.

[0012] Beneficial effect: By sequentially welding the second connecting members from the first connecting member at the edge to the first connecting member in the middle, the overall deformation of the frame structure can be limited.

[0013] In an optional embodiment, welding the second connecting members in sequence from the first connecting members at the edge to the first connecting members in the middle includes:

[0014] Welding one end of a first of the second connecting members to an edge of a first of the first connecting members;

[0015] Welding one end of a second second connecting member to a second first connecting member adjacent to the first first connecting member;

[0016] Welding the other end of the first second connecting member to the second first connecting member;

[0017] welding one end of a third second connecting member to a third first connecting member adjacent to the second first connecting member;

[0018] welding the other end of the second second connecting member to the third first connecting member;

[0019] Follow the above steps to perform welding in sequence.

[0020] In an optional embodiment, welding the second connecting members in sequence from the first connecting members at the edge to the first connecting members in the middle includes:

[0021] The second connecting pieces are welded sequentially from the first connecting pieces at two edges to the first connecting piece in the middle at the same time.

[0022] Beneficial effect: By simultaneously starting welding from the first connecting pieces at two edges, the welding efficiency can be improved.

[0023] In an optional embodiment, a plurality of the second connecting members are welded between two adjacent first connecting members, and the plurality of the second connecting members are welded sequentially from top to bottom along the extending length direction of the first connecting member.

[0024] Beneficial effect: By welding the plurality of second connecting members in sequence from top to bottom, the influence of the deformation of the lower second connecting members on the upper second connecting members can be reduced, thereby improving the stability and safety of the structure.

[0025] In an optional embodiment, welding a plurality of the second connecting members between two adjacent first connecting members comprises:

[0026] After welding the second connecting members in the top row, the second connecting members in the next row are welded downward in sequence.

[0027] In an optional embodiment, before welding at least one second connecting member between two adjacent first connecting members, the method further includes:

[0028] A fixing component is provided between the first connecting member and the second connecting member;

[0029] The second connecting member is pre-fixed on the first connecting member through the fixing assembly.

[0030] Beneficial effect: By setting up the fixing assembly, it is possible to prevent the other end of the second connecting member from being unsupported after one end of the second connecting member is welded to the first connecting member, thereby causing the welding end to deform and seriously reducing the welding quality.

[0031] In an optional embodiment, the first connecting member is provided with protruding ends on both sides, and the fixing assembly includes:

[0032] A first fixing member, fixedly connected to the second connecting member and partially extending out of the second connecting member;

[0033] A second fixing member, fixedly connected to the protruding end and arranged corresponding to the first fixing member;

[0034] A fastener is used to fix the protruding portion of the first fixing member and the second fixing member.

[0035] Beneficial effect: the second connecting member is supported by the first fixing member and the second fixing member together, and the support is more stable.

[0036] In an optional embodiment, after welding at least one second connecting member between two adjacent first connecting members, the method further includes:

[0037] Remove the fixing assembly.

[0038] In an optional embodiment, the first connecting member is a steel column;

[0039] And / or, the second connecting member is a steel beam;

[0040] and / or, the extending length direction of the first connecting member is perpendicular to the extending length direction of the second connecting member;

[0041] And / or, the first connecting member and the second connecting member together form a rectangular frame structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A schematic structural diagram of a rectangular frame structure according to an embodiment of the present invention;

[0044] Figure 2 for Figure 1 A schematic diagram of a partial structure of a rectangular frame structure shown;

[0045] Figure 3 A schematic diagram of a welding method according to an embodiment of the present invention;

[0046] Figure 4 It is a stress simulation deformation diagram of the prior art sequential welding method from the middle to both sides;

[0047] Figure 5 It is a stress simulation deformation diagram of the prior art sequential welding method from both sides to the middle;

[0048] Figure 6 It is a stress simulation deformation diagram of the interval welding method from both sides to the middle according to an embodiment of the present invention;

[0049] Figure 7 It is a stress simulation deformation diagram of the bottom-up welding method in the prior art;

[0050] Figure 8 This is a stress simulation deformation diagram of the top-down welding method according to an embodiment of the present invention.

[0051] Description of reference numerals:

[0052] 1. First connecting member; 11. Extended end; 2. Second connecting member; 3. Fixing assembly; 31. First fixing member; 32. Second fixing member. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0054] Combine the following Figures 1 to 8 , describing an embodiment of the present invention.

[0055] According to an embodiment of the present invention, a welding method is provided, comprising the following steps: arranging at least two first connecting members 1 at intervals; welding at least one second connecting member 2 between two adjacent first connecting members 1, wherein one end of the second connecting member 2 is first welded to one of the first connecting members 1, and then the other end of the second connecting member 2 is welded to another adjacent first connecting member 1 after a preset time interval, and the preset time is greater than or equal to four hours.

[0056] By welding one end of the second connecting member 2 and then welding the other end after a preset time, the welding end can be fully cooled within the preset time, thermal stress and deformation can be effectively released, and residual stress can be eliminated, thereby improving the welding quality and mechanical properties between the first connecting member 1 and the second connecting member 2, improving the installation accuracy, ensuring that the overall geometric shape of the structure remains unchanged, and improving the overall stability, safety and service life of the structure; and eliminating the residual stress caused by welding by a preset time interval is simple, easy and low-cost.

[0057] In this embodiment, the first connecting member 1 is a steel column, and the second connecting member 2 is a steel beam. As a convertible implementation, the first connecting member 1 and the second connecting member 2 can be any two groups of structures that need to be welded, and there is no excessive restriction here.

[0058] The preset time in this embodiment is four hours. As a convertible implementation method, in order to further improve the welding quality, the preset time can also be five hours or six hours, and there is no excessive restriction here.

[0059] like Figure 1 As shown, the steel columns in this embodiment are provided with more than three; the extension length direction of the steel columns is perpendicular to the extension length direction of the steel beams; the steel columns and the steel beams together form a rectangular frame structure. As a convertible implementation, the number of steel columns is determined according to actual conditions, and no excessive restrictions are made here. As a convertible implementation, the extension length direction of the steel columns and the extension length direction of the steel beams can also be inclined, and no excessive restrictions are made here. As a convertible implementation, the steel columns and the steel beams can also form a planar frame structure, or it can be determined according to actual conditions.

[0060] In this embodiment, welding at least one steel beam between two adjacent steel columns includes: welding the steel beams in sequence from the edge steel column to the middle steel column. Specifically, welding the steel beams in sequence from the edge steel column to the middle steel column includes: welding the steel beams in sequence from the two edge steel columns to the middle steel column at the same time. By welding the steel beams in sequence from the edge steel columns to the middle steel column, the overall deformation of the frame structure can be limited; by welding from the two edge steel columns at the same time, the welding efficiency can be improved. As a convertible embodiment, it is also possible to weld the steel beams in sequence from one edge steel column to the other edge steel column.

[0061] In order to improve welding efficiency, steel beams are welded in sequence from the edge steel column to the middle steel column, including: welding one end of the first steel beam to the first steel column at the edge; welding one end of the second steel beam to the second steel column adjacent to the first steel column; welding the other end of the first steel beam to the second steel column; welding one end of the third steel beam to the third steel column adjacent to the second steel column; welding the other end of the second steel beam to the third steel column; welding is performed in sequence according to the above steps. The welding area is evenly heated during welding. As a convertible embodiment, it can also be that after one end of the steel beam is completely welded, the other end is welded; or, every two adjacent steel beams are welded as a group, and after welding one end of the two steel beams, the other end is welded.

[0062] Furthermore, if Figure 3 As shown, in this embodiment, all the steel beams to be welded are first divided into four combinations, two combination 1s are combinations at the edge, and both combination 1s include the welding of two adjacent steel beams, and the welding of the third steel beam and combination 2. The remaining steel beams near the middle are divided into two combination 2s, and the four combinations are welded by four operators at the same time. The welding sequence of combination 1 is: welding one end of the second steel beam to the second steel column adjacent to the first steel column at the edge; welding one end of the first steel beam to the second steel column; welding the other end of the second steel beam to the third steel column adjacent to the second steel column; welding the other end of the first steel beam to the first steel column; welding one end of the third steel beam to the third steel column. The welding sequence of combination 2 is: welding one end of the fourth steel beam to the fourth steel column adjacent to the third steel column; welding the other end of the third steel beam to the fourth steel column; welding one end of the fifth steel beam to the fifth steel column adjacent to the fourth steel column; welding the other end of the fourth steel beam to the fifth steel column. For a steel beam located in the middle of two combinations, that is, when both ends of the steel beam are located in two combinations respectively, the welding interval at both ends of the steel beam is 4 hours.

[0063] like Figure 1As shown, in this embodiment, three steel beams are welded between two adjacent steel columns, and the three steel beams are welded in sequence from top to bottom along the extension length direction of the steel column. Among them, welding multiple steel beams between two adjacent steel columns includes: welding the top row of steel beams and then welding the next row of steel beams in sequence downward. By welding the three steel beams in sequence from top to bottom, the influence of the deformation of the lower steel beams on the upper steel beams can be reduced, thereby improving the stability and safety of the structure. As a convertible implementation method, the number of steel beams welded between two adjacent steel columns is determined according to the length of the steel column and the strength requirements of the structure, and no excessive restrictions are made here.

[0064] like Figure 1 As shown, in this embodiment, before welding at least one steel beam between two adjacent steel columns, the method further includes: setting a fixing assembly 3 between the steel column and the steel beam; and pre-fixing the steel beam on the steel column through the fixing assembly 3. By setting the fixing assembly 3, it is possible to prevent the other end of the steel beam from being unsupported after one end of the steel beam is welded to the steel column, thereby preventing the welded end from being deformed and seriously reducing the welding quality.

[0065] After welding at least one steel beam between two adjacent steel columns, the method further includes: removing the fixing assembly 3. As a convertible implementation, the fixing assembly 3 may not be removed.

[0066] like Figure 2 As shown, the steel column in this embodiment is provided with an extended end 11 on both sides, and the fixing assembly 3 includes: a first fixing member 31, which is fixedly connected to the steel beam and partially extends out of the steel beam; a second fixing member 32, which is fixedly connected to the extended end 11 and is arranged corresponding to the first fixing member 31; and a fastener, which is used to fix the extended part of the first fixing member 31 with the second fixing member 32. Among them, the extended end 11 is the corbel of the steel column, the first fixing member 31 is a first flat plate, and the first flat plate is provided with a first mounting hole and a hoisting hole, the second fixing member 32 is a second flat plate, and the second flat plate is provided with a second mounting hole, the fastener is a bolt, and the bolt is inserted through the first mounting hole and the second mounting hole for fixing, and the cross-sectional shape of the corbel is the same as the cross-sectional shape of the steel beam, both of which are I-shaped. A part of the first flat plate is fixedly connected to the steel beam, and the other part is overlapped on the corbel and fixed with the second flat plate by bolts, and the hoisting hole is used to lift the steel beam to the position corresponding to the corbel. The steel beam is supported by the first fixing member 31 and the second fixing member 32 together, and the support is more stable. As a convertible implementation, a flat plate portion may extend from the bottom of the corbel, and both ends of the steel beam may be supported on the flat plate portion for pre-fixation.

[0067] The interval welding method mentioned in this embodiment is that one end of the steel beam is welded to a steel column, and after a preset time interval, the other end is welded to another adjacent steel column; the sequential welding method is that after one end of the steel beam is welded to a steel column, the other end is immediately welded to another adjacent steel column.

[0068] The stress simulation deformation diagram of the single-layer rectangular frame structure in this embodiment using the interval welding method from both sides to the middle is as follows: Figure 6 As shown in the figure, it can be seen that the maximum deformation of the single-layer rectangular frame structure occurs at the top of the steel columns at the four corners, and the maximum displacement is 2.37 cm; while the existing sequential welding method from the middle to the two sides (such as Figure 4 As shown), or the existing sequential welding method from both sides to the middle (as shown Figure 5 The maximum displacements of the two devices (as shown) were 3.13 cm and 2.87 cm, respectively, and the displacements were reduced by 32% and 21%, respectively.

[0069] The three-layer rectangular frame structure in this embodiment adopts the interval welding method from both sides to the middle in the horizontal direction and the welding method from top to bottom in the vertical direction. The stress simulation deformation diagram is shown in FIG. Figure 8 As shown in the figure, it can be seen that the maximum deformation of the three-layer rectangular frame structure occurs at the top of the steel columns at the four corners, and the maximum displacement is 3.09 cm. The horizontal direction adopts the interval welding method from both sides to the middle, and the vertical direction adopts the bottom-up welding method (such as Figure 7 The maximum displacement of the 3D image (as shown) is 3.27 cm, a reduction of 6%.

[0070] In the present embodiment, when welding the steel beams and steel columns, an interval welding method from both sides to the middle is adopted in the horizontal direction, and a welding method from top to bottom is adopted in the vertical direction. This can reduce the overall displacement of the three-layer rectangular frame structure, thereby making the actual size of the rectangular frame structure less different from the design size, meeting the structural design strength requirements, and thus improving the safety and service life of the structure.

[0071] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A welding method, characterized in that: The following steps are involved: At least two first connecting members (1) are arranged at intervals; At least one second connecting member (2) is welded between two adjacent first connecting members (1), wherein one end of the second connecting member (2) is first welded to one of the first connecting members (1), and then the other end of the second connecting member (2) is welded to another adjacent first connecting member (1) after a preset time interval, wherein the preset time is greater than or equal to four hours.

2. The welding method according to claim 1, characterized in that: The first connecting members (1) are provided with at least three; At least one second connecting member (2) is welded between two adjacent first connecting members (1), comprising: The second connecting pieces (2) are welded in sequence starting from the first connecting piece (1) at the edge to the first connecting piece (1) in the middle.

3. The welding method according to claim 2, characterized in that: The second connecting pieces (2) are welded sequentially from the first connecting piece (1) at the edge to the first connecting piece (1) in the middle, comprising: Welding one end of a first of the second connecting members (2) to an edge of a first of the first connecting members (1); Welding one end of the second second connecting member (2) to the second first connecting member (1) adjacent to the first first connecting member (1); Welding the other end of the first second connecting member (2) to the second first connecting member (1); Welding one end of the third second connecting member (2) to the third first connecting member (1) adjacent to the second first connecting member (1); Welding the other end of the second second connecting member (2) to the third first connecting member (1); Follow the above steps to perform welding in sequence.

4. The welding method according to claim 2, characterized in that: The second connecting pieces (2) are welded sequentially from the first connecting piece (1) at the edge to the first connecting piece (1) in the middle, comprising: The second connecting pieces (2) are welded in sequence from the first connecting pieces (1) at the two edges to the first connecting piece (1) in the middle at the same time.

5. The welding method according to any one of claims 2 to 4, characterized in that: A plurality of the second connecting members (2) are welded between two adjacent first connecting members (1), and the plurality of the second connecting members (2) are welded in sequence from top to bottom along the extension length direction of the first connecting member (1).

6. The welding method according to claim 5, characterized in that: A plurality of the second connecting members (2) are welded between two adjacent first connecting members (1), comprising: After the second connecting members (2) in the top row are welded, the second connecting members (2) in the next row are welded downwards in sequence.

7. The welding method according to any one of claims 1 to 4, characterized in that: Before welding at least one second connecting member (2) between two adjacent first connecting members (1), the method further comprises: A fixing component (3) is arranged between the first connecting member (1) and the second connecting member (2); The second connecting member (2) is pre-fixed on the first connecting member (1) via the fixing assembly (3).

8. The welding method according to claim 7, characterized in that: The first connecting member (1) is provided with protruding ends (11) on both sides respectively, and the fixing assembly (3) comprises: A first fixing member (31) is fixedly connected to the second connecting member (2) and partially extends out of the second connecting member (2); A second fixing member (32) is fixedly connected to the protruding end (11) and is arranged corresponding to the first fixing member (31); A fastener is used to fix the protruding portion of the first fixing member (31) and the second fixing member (32).

9. The welding method according to claim 7, characterized in that: After welding at least one second connecting member (2) between two adjacent first connecting members (1), the method further comprises: Remove the fixing assembly (3).

10. The welding method according to any one of claims 1 to 4, characterized in that: The first connecting member (1) is a steel column; And / or, the second connecting member (2) is a steel beam; And / or, the extension length direction of the first connecting member (1) is perpendicular to the extension length direction of the second connecting member (2); And / or, the first connecting member (1) and the second connecting member (2) together form a rectangular frame structure.

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