CN117696686B - T-shaped welding structure deformation correction and weld reinforcement combined machining method - Google Patents
T-shaped welding structure deformation correction and weld reinforcement combined machining method Download PDFInfo
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- CN117696686B CN117696686B CN202410167751.6A CN202410167751A CN117696686B CN 117696686 B CN117696686 B CN 117696686B CN 202410167751 A CN202410167751 A CN 202410167751A CN 117696686 B CN117696686 B CN 117696686B
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- 238000003466 welding Methods 0.000 title claims abstract description 121
- 230000002787 reinforcement Effects 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 18
- 238000003754 machining Methods 0.000 title description 2
- 238000005422 blasting Methods 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 238000003672 processing method Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005480 shot peening Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 229910001148 Al-Li alloy Inorganic materials 0.000 description 2
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 239000001989 lithium alloy Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000003090 exacerbative effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/16—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides a composite processing method for deformation correction and weld reinforcement of a T-shaped welding structure, which comprises the following steps: welding the rib plates with the bottom plate to form a T-shaped welding structure; according to the theoretical section of the T-shaped welding structure, calculating the stretching force required by the T-shaped welding structure to stretch by a preset elongation along the length direction of the T-shaped welding structure; clamping two ends of the T-shaped welding structure through the chuck device, and driving the chuck device to apply pretightening force equal to the stretching force on the two ends of the T-shaped welding structure so as to enable the T-shaped welding structure to elastically deform and straighten; the clamping head device is used for clamping the T-shaped welding structure and carrying out double-sided shot blasting reinforcement on the welding line area of the T-shaped welding structure. The invention can simultaneously realize the effects of eliminating structural deformation, improving residual stress distribution of a welding area and improving the reliability of the welding structure, and improves the fatigue resistance of the T-shaped welding structure.
Description
Technical Field
The invention relates to the technical field of aerospace manufacturing, in particular to a composite processing method for deformation correction and weld reinforcement of a T-shaped welding structure.
Background
In the welding process of the metal sheet, the weld zone is restrained by a part far from the weld joint and cannot be freely stretched due to the fact that the weld zone is locally heated and expanded, so that the weld zone is pressed to generate plastic deformation, and in the subsequent cooling process, the weld zone is contracted to be shorter than other parts and is restrained by the part far from the weld joint and cannot be freely shortened, so that residual tensile stress is generated due to tension, and other parts are subjected to residual compressive stress.
Uneven residual stress distributed in the welding structure can have a plurality of adverse effects on the component, and the internal welding residual stress easily causes buckling deformation of the part; higher levels of weld residual tensile stress can lead to stress corrosion cracking, while exacerbating wear; the welding residual tensile stress easily causes crack generation and expansion, and reduces the fatigue performance of the welded structure. At present, methods for reducing welding residual stress and welding deformation after welding mainly comprise stress relief annealing, cold stretching, flame method or vibration method, hammering, rolling, shot blasting and the like, but a single treatment method can only improve the residual stress or the welding deformation, the purposes of stress regulation and deformation control cannot be achieved at the same time, and reheat embrittlement and reheat cracks can be generated in a welding part by a heat treatment method.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to solve the technical problems that the existing treatment method can only improve residual stress or welding deformation and can not realize the purposes of stress regulation and deformation control at the same time.
(II) technical scheme
In order to achieve the above purpose, the invention adopts the following technical scheme:
The invention provides a composite processing method for deformation correction and weld reinforcement of a T-shaped welding structure, which comprises the following steps:
s1, welding a rib plate and a bottom plate to form a T-shaped welding structure;
s2, calculating the tensile force required by the T-shaped welding structure to stretch by a preset elongation along the length direction of the T-shaped welding structure according to the theoretical section of the T-shaped welding structure;
S3, clamping two ends of the T-shaped welding structure through a chuck device, and driving the chuck device to apply pretightening force equal to the stretching force to the two ends of the T-shaped welding structure so that the T-shaped welding structure is elastically deformed and straightened;
And S4, maintaining the clamping of the clamping head device to the T-shaped welding structure, and performing double-sided shot blasting reinforcement on a welding line area of the T-shaped welding structure.
Preferably, the tensile force f=e×ε×s, where E is the elastic modulus of the material of the T-shaped welded structure, ε is the elongation of the T-shaped welded structure, and S is the cross-sectional area of the T-shaped welded structure.
Preferably, the preset elongation is 0.5% L, wherein L is the length of the T-shaped welded structure in the welding direction.
Preferably, after step S3 is completed, the chuck device and the T-shaped welding structure are shielded, and only a weld region is left.
Preferably, the chuck device comprises: the first upright post, the second upright post, the first chuck, the second chuck, the first pre-tightening piece and the second pre-tightening piece are oppositely arranged; the first clamping head is used for clamping one end of the T-shaped welding structure; the second chuck is used for clamping the other end of the T-shaped welding structure; the first pre-tightening piece is connected with the first upright post in a threaded manner, and the end part of the first pre-tightening piece is fixedly connected with the first chuck; the second pre-tightening piece is connected with the second upright post in a threaded mode, and the end portion of the second pre-tightening piece is fixedly connected with the second clamping head.
Preferably, the first clamping head comprises a first clamping part fixedly connected to the end part of the first pre-tightening piece, the first clamping part is provided with a first T-shaped mounting groove matched with the T-shaped welding structure, and the surface of the first clamping part is provided with a plurality of first fasteners used for fixing the T-shaped welding structure in the first T-shaped mounting groove.
Preferably, the first chuck further comprises a first spacer disposed between the first fastener and the T-shaped weld structure.
Preferably, the second clamping head comprises a second clamping part, the second clamping part is fixedly connected to the end part of the second pre-tightening piece, the second clamping part is provided with a second T-shaped mounting groove matched with the T-shaped welding structure, and the surface of the second clamping part is provided with a plurality of second fasteners used for fixing the T-shaped welding structure in the second T-shaped mounting groove.
Preferably, the second chuck further comprises a second spacer disposed between the second fastener and the T-shaped weld structure.
(III) beneficial effects
The technical scheme of the invention has at least the following advantages:
1. Aiming at the problem that uneven welding residual stress and macroscopic buckling deformation are generated after welding of a T-shaped welding structure, the invention adopts the pre-tightening force in the length direction (welding direction) to carry out shot peening strengthening of a welding line area on the T-shaped welding structure, and simultaneously realizes the effects of eliminating structural deformation, improving the residual stress distribution of the welding area and improving the reliability of the welding structure, and improves the fatigue resistance of the T-shaped welding structure.
2. Compared with the process of carrying out the correction by adopting a single treatment mode (such as shot blasting), the method provided by the invention has the advantages that the pretightening force is applied to the part in advance for stretching, the deformation degree of the part is improved, the shot blasting time is reduced, the production efficiency is improved, the production cost is reduced, and the composite processing method provided by the invention is an efficient, low-cost and high-reliability method, and has good economic benefit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a T-shaped welding structure according to an embodiment of the present invention.
Fig. 2 is a flowchart of a method for processing deformation correction and weld reinforcement of a T-shaped welded structure according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a chuck device according to an embodiment of the present invention.
Fig. 4 is a dimensional view of an embodiment of a T-shaped solder structure according to an embodiment of the present invention.
The reference numerals in the drawings are as follows:
1. Rib plates; 2. a bottom plate; 10. a T-shaped welding structure; 20. a chuck device; 21. a first upright; 22. a second upright; 23. a first chuck; 24. a second chuck; 25. a first pretension; 26. a second pretension; 241. a second clamping portion; 242. and a second fastener.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected or indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing the invention based on the orientation or positional relationship shown in the drawings, and are not to be construed as limiting the invention, as the indicating device or element must have a particular orientation, be constructed and operated in a particular orientation.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating relative importance or indicating the number of technical features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The following describes in more detail the specific implementation of the present invention in connection with specific embodiments:
As shown in fig. 1, 2 and 3, the embodiment of the invention provides a composite processing method for deformation correction and weld reinforcement of a T-shaped welding structure, which comprises the following steps:
S1, welding a rib plate 1 with a bottom plate 2 to form a T-shaped welding structure 10; the T-shaped weld structure 10 includes, but is not limited to, a T-shaped weld joint and an I-shaped weld joint.
S2, according to the theoretical section of the T-shaped welding structure 10, calculating the stretching force required by the elongation of the T-shaped welding structure 10 along the length direction by a preset elongation; specifically, when the T-shaped welded structure 10 is stretched to the preset elongation, elastic deformation occurs in the length direction thereof and is straightened.
S3, clamping two ends of the T-shaped welding structure 10 through the chuck device 20, and driving the chuck device 20 to apply pretightening force equal to the stretching force to the two ends of the T-shaped welding structure 10 so as to enable the T-shaped welding structure 10 to elastically deform and straighten; in particular, the pretension may be performed by a torque wrench such that the pretension force is equal to the tensile force.
S4, holding the clamping head device 20 to clamp the T-shaped welding structure 10, and performing double-sided shot peening on the welding line area of the T-shaped welding structure 10. The pre-tightening force is applied to only elastically deform the T-shaped welding structure 10, and if the T-shaped welding structure 10 is unloaded from the chuck device 20, the T-shaped welding structure 10 still returns to the original shape, and the welding seam area of the T-shaped welding structure 10 is subjected to double-sided shot peening under the clamping action of the chuck device 20, so that the residual stress of the welding seam area is eliminated and the T-shaped welding structure 10 is shaped. The double-sided shot peening can shape the T-shaped welding structure 10, keep the state of the T-shaped welding structure after being straightened, further correct the shape of the T-shaped welding structure 10, and improve the precision of subsequent processing. In addition, by introducing elastic compensation through the externally applied pretightening force along the length direction, the residual compressive stress and the residual tensile stress of the welding line area can be offset, the residual stress distribution of the welding area is improved, and the reliability of the welding structure is improved.
In one embodiment, the tensile force f=e×ε×s, where E is the modulus of elasticity of the material of the T-shaped welded structure 10, ε is the elongation of the T-shaped welded structure 10, and S is the cross-sectional area of the T-shaped welded structure 10.
In one embodiment, the predetermined elongation is 0.5% L, where L is the length of the T-shaped welded structure 10 in the welding direction. The T-shaped welded structure 10 is generally made of a metal material, and most of the metal material is elastically deformed when the predetermined elongation is 0.5% l.
In one embodiment, after step S3 is completed, the cartridge assembly 20 and the T-shaped weld structure 10 are shielded, leaving only the weld area. The purpose of masking the collet device 20 and the T-shaped weld structure 10 is to avoid shot peening into this area.
In one embodiment, the cartridge device 20 comprises: the first upright 21 and the second upright 22 which are oppositely arranged, a first chuck 23, a second chuck 24, a first pretensioning piece 25 and a second pretensioning piece 26; the first clamping head 23 is used for clamping one end of the T-shaped welding structure 10; the second chuck 24 is used for clamping the other end of the T-shaped welding structure 10; the first pre-tightening piece 25 is connected to the first upright 21 in a threaded manner, and the end part of the first pre-tightening piece is fixedly connected to the first chuck 23; the second pretensioning member 26 is screwed to the second upright 22 and the end is fixedly connected to the second chuck 24. Specifically, the first pretensioner 25 includes, but is not limited to, a screw and a stud; the second pretension 26 includes, but is not limited to, a screw and a stud.
In one embodiment, the first clamping head 23 comprises a first clamping portion fixedly connected to an end of the first pretensioning member 25, the first clamping portion is provided with a first T-shaped mounting groove adapted to the T-shaped welding structure 10, and a surface of the first clamping portion is provided with a plurality of first fasteners for fixing the T-shaped welding structure 10 in the first T-shaped mounting groove. Specifically, the first fastener includes, but is not limited to, a screw and a stud. The first fasteners are plural and can be used to fix the top and side surfaces of the rib plate 1 and the top surface of the bottom plate 2, respectively.
In one embodiment, the first clamp head 23 further includes a first shim disposed between the first fastener and the T-shaped weld structure 10. The first washer is positioned to prevent the first fastener end from causing an indentation in the surface of the part.
In one embodiment, the second chuck 24 includes a second clamping portion 241, where the second clamping portion 241 is fixedly connected to an end of the second pretensioning member 26, the second clamping portion 241 is provided with a second T-shaped mounting groove adapted to the T-shaped welding structure 10, and a surface of the second clamping portion 241 is provided with a plurality of second fasteners 242 for fixing the T-shaped welding structure 10 in the second T-shaped mounting groove. Specifically, the second fastener 242 includes, but is not limited to, a screw and a stud. The second fasteners are plural and can be used to fix the top and side surfaces of the rib plate 1 and the top surface of the bottom plate 2, respectively.
In one embodiment, the second clamp 24 further includes a second shim disposed between the second fastener 242 and the T-shaped weld structure 10. The purpose of the second washer is to prevent the end of the second fastener 242 from making an indentation in the surface of the part.
The following is a specific embodiment of the present application:
Taking a T-shaped welding structure of a 2A97 aluminum lithium alloy welding with an I-shaped section as an example, the specific implementation process of the embodiment is described. The elastic modulus of the 2A97 aluminum lithium alloy is 77GPa, and the tensile force required by the T-shaped welding structure to extend 0.5% along the longitudinal direction is 192885N according to the section size of figure 4. The first and second fasteners 242 are sequentially preloaded to install the T-weld configuration in the cartridge device. The first pretension 25 and the second pretension 26 are 8.8 grade M48 steel screws, and the pretension moment is 1656n·m when the pretension is 192885N calculated by the bolt pretension formula. The T-shaped welded structure fixed to the chuck device is placed between the first column 21 and the second column 22, and the first pretensioner 25 and the second pretensioner 26 are pretensioned by a torque wrench, and the pretensioning torque is 1656n·m. And finally, shielding and protecting the chuck device and the T-shaped welding structure, only leaving a welding seam area, carrying out double-sided shot blasting strengthening on the welding seam area through a shot blasting machine, and disassembling the chuck device after strengthening is finished.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (4)
1. The composite processing method for deformation correction and weld reinforcement of the T-shaped welding structure is characterized by comprising the following steps of:
s1, welding a rib plate and a bottom plate to form a T-shaped welding structure;
S2, calculating a tensile force required by elongating the T-shaped welding structure along the length direction of the T-shaped welding structure by a preset elongation according to the theoretical section of the T-shaped welding structure, wherein the tensile force F=E×epsilon×S, E is the elastic modulus of a material of the T-shaped welding structure, epsilon is the elongation of the T-shaped welding structure, S is the cross-sectional area of the T-shaped welding structure, and the preset elongation is 0.5% L, wherein L is the length of the T-shaped welding structure along the welding direction;
S3, clamping two ends of the T-shaped welding structure through a chuck device, and driving the chuck device to apply pretightening force equal to the stretching force to the two ends of the T-shaped welding structure so that the T-shaped welding structure is elastically deformed and straightened;
wherein, the chuck device includes:
the first stand column and the second stand column are oppositely arranged;
The first clamping head is used for clamping one end of the T-shaped welding structure;
the second clamping head is used for clamping the other end of the T-shaped welding structure;
the first pretension piece is in threaded connection with the first upright post, and the end part of the first pretension piece is fixedly connected with the first chuck and is used for pretensioning the T-shaped welding structure;
the second pretension piece is in threaded connection with the second upright post, and the end part of the second pretension piece is fixedly connected with the second chuck and is used for pretensioning the T-shaped welding structure;
The first clamping head comprises a first clamping part which is fixedly connected to the end part of the first pre-tightening piece, a first T-shaped mounting groove matched with the T-shaped welding structure is formed in the first clamping part, and a plurality of first fasteners used for fixing the T-shaped welding structure in the first T-shaped mounting groove are arranged on the surface of the first clamping part;
The second clamping head comprises a second clamping part which is fixedly connected to the end part of the second pre-tightening piece, a second T-shaped mounting groove matched with the T-shaped welding structure is formed in the second clamping part, and a plurality of second fasteners used for fixing the T-shaped welding structure in the second T-shaped mounting groove are arranged on the surface of the second clamping part;
And S4, maintaining the clamping of the clamping head device to the T-shaped welding structure, and performing double-sided shot blasting reinforcement on a welding line area of the T-shaped welding structure.
2. The method of claim 1, wherein after step S3, shielding the chuck device and the T-shaped welded structure to leave only a weld region.
3. The method of claim 1, wherein the first chuck further comprises a first shim disposed between the first fastener and the T-weld.
4. The method of claim 1, wherein the second chuck further comprises a second shim disposed between the second fastener and the T-weld.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410167751.6A CN117696686B (en) | 2024-02-06 | 2024-02-06 | T-shaped welding structure deformation correction and weld reinforcement combined machining method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410167751.6A CN117696686B (en) | 2024-02-06 | 2024-02-06 | T-shaped welding structure deformation correction and weld reinforcement combined machining method |
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| CN117696686A CN117696686A (en) | 2024-03-15 |
| CN117696686B true CN117696686B (en) | 2024-05-07 |
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| CN117696686A (en) | 2024-03-15 |
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