CN119800054A - A method and device for eliminating residual stress of TIG weld - Google Patents
A method and device for eliminating residual stress of TIG weld Download PDFInfo
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- CN119800054A CN119800054A CN202510026240.7A CN202510026240A CN119800054A CN 119800054 A CN119800054 A CN 119800054A CN 202510026240 A CN202510026240 A CN 202510026240A CN 119800054 A CN119800054 A CN 119800054A
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Abstract
The invention discloses a method and a device for eliminating residual stress of a TIG welding seam, the device comprises a roller, a loading mechanism, a running part, a track and a controller, wherein the track is arranged on a welded workpiece along the length direction of the welding seam, the running part is arranged on the track, the roller and the loading mechanism are arranged on the running part, a rotating shaft of the roller is movably connected with the loading mechanism, the roller is used for rolling the welding seam under the action of loading force of the loading mechanism, and the loading mechanism is connected with a TIG welding gun. According to the welded seam rolled after welding, the residual tensile stress is obviously eliminated, so that the residual tensile stress of the whole welded seam metal is eliminated.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to a method and a device for eliminating residual stress of a TIG (tungsten inert gas) welding line.
Background
Because of the characteristics of welding thermal cycle, particularly multi-layer multi-pass welding, high welding residual stress is easy to occur to the welding seam, so that the bearing capacity of the welding seam is deteriorated, the strength is reduced, the impact toughness is reduced, the performance reserve of the joint is reduced, and the reliability of the joint and the welding structure is seriously improved.
The conventional method for eliminating the welding residual stress is to relax the stress by the local micro-deformation of the welded joint through the post-welding heat treatment. However, the postweld heat treatment has obvious limitations that firstly, the reheat cracking tends to be induced in the welding of materials with reheat cracking, secondly, the accumulation and superposition of welding residual stress are easy to cause in the multilayer multi-pass TIG welding process of large-size and thick-wall material parts, the risk of cracking of the welding seam is increased, and thirdly, the deformation is easy to cause in the parts with the size below the medium plate. In addition, post-weld heat treatment is also prone to additional thermal stresses on large-size, thick-walled material components.
Disclosure of Invention
The invention aims to solve the problem of the existing welding residual stress, and provides a method and a device for eliminating the residual stress of a TIG welding seam.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The invention provides a device for eliminating residual stress of a TIG welding seam, which comprises a roller, a loading mechanism, a running part, a track and a controller, wherein the roller is arranged on the roller;
When the welding device is in a working state, the track is arranged on a welded workpiece along the length direction of the welding seam, the running part is arranged on the track, the roller and the loading mechanism are arranged on the running part, the rotating shaft of the roller is movably connected with the loading mechanism, the roller is used for rolling the welding seam under the action of the loading force of the loading mechanism, the loading mechanism is connected with a TIG welding gun, and the controller is used for controlling the heat input of the TIG welding gun, the running speed of the running part and the roller loading force of the loading mechanism and simultaneously used for starting, suspending and stopping the running of the device.
The invention is further improved in that the track is divided into a straight track and a circular track which are respectively used for the TIG straight welding seam and the circular welding seam.
The invention is further improved in that the loading force on the roller is set and adjusted by the loading mechanism according to different types of weld metals.
A further improvement of the invention is that the depth of the weld or groove is no greater than 450mm.
The invention is further improved in that the distance between the roller and the TIG welding gun is 40-60 mm.
The invention is further improved in that the loading mechanism is connected with a TIG welding gun through a connecting rod.
The invention also provides a method for eliminating the residual stress of the TIG welding seam, which is based on the device for eliminating the residual stress of the TIG welding seam and comprises the following steps:
The track is arranged on a welded workpiece along the length direction of the welding seam, the running part moves freely on the track, and the controller controls the heat input of the TIG welding gun, the running speed of the running part and the roller loading force of the loading mechanism so as to ensure the heating effect and the rolling effect of the TIG welding gun on the welding seam.
The invention is further improved in that the controller sets the heat input of the TIG welding gun according to the thickness of the welding seam and the type of welding seam metal, wherein the heat input comprises welding current and arc voltage.
The invention further improves that the TIG welding gun automatically tracks the arc length according to the shape of the welding line in the advancing process.
The invention is further improved in that the method is suitable for stress relief treatment between layers/channels of multi-layer multi-pass welding, or stress relief treatment is carried out by rolling the welding seam after the whole welding seam is formed.
The invention has at least the following beneficial technical effects:
According to the device for eliminating the residual stress of the TIG welding seam, the track is arranged on the welded workpiece along the length direction of the welding seam, the running part can freely move on the track and synchronously drive the roller and the loading mechanism on the running part to move, when the device works, the TIG welding gun on the loading mechanism rolls the welding seam under the action of the loading force of the loading mechanism after welding the welded workpiece, so that the residual stress of the welding seam is eliminated, and meanwhile, the controller controls the heat input of the TIG welding gun, the running speed of the running part and the roller loading force of the loading mechanism, so that the device can stably run under the setting condition.
Furthermore, the track can be replaced according to the situation, when the straight track is adopted, the TIG straight welding seam can be carried out, and when the circular track is adopted, the TIG circular welding seam can be carried out.
Furthermore, according to different types of weld metals, the loading force of the roller is set and regulated through a loading mechanism, and the loading mechanism can adopt the existing electric push rod, pneumatic cylinder, hydraulic cylinder or screw mechanism lamp.
Further, according to the rolled weld, the depth of the weld or groove should be not more than 450mm in view of achieving the effect of eliminating the residual stress of the weld.
Further, in the welding process, the distance between the roller and the TIG welding gun is 40-60 mm, so that the welding seam can be rolled in time.
The invention provides a method for eliminating the residual stress of a TIG welding line, which adopts the technical principle that the TIG welding line is self-melted and heated and the welding line is synchronously rolled, and compressive stress is generated by plastic deformation at the high temperature state of the welding line, so that the residual tensile stress generated by shrinkage during solidification forming of the welding line is eliminated. Specifically, the method controls the heat input of the TIG welding gun, the running speed of the running part and the roller loading force of the loading mechanism through the controller so as to ensure the heating effect and the rolling effect of the TIG welding gun on the welding seam, and further synchronously follows the rolling welding seam, thereby realizing the elimination of the residual stress of the welding seam.
Further, according to the thickness of the welding seam and the type of welding seam metal, the controller sets the heat input of the TIG welding gun welding, wherein the heat input comprises welding current and arc voltage.
Furthermore, the TIG welding gun automatically tracks the arc length according to the shape of the welding line in the advancing process, so that the residual stress of the welding line in a welding state can be remarkably eliminated.
Furthermore, the method is suitable for the stress relief treatment between layers/channels of multi-layer multi-channel welding, or the stress relief treatment is carried out by rolling the welding seam after the whole welding seam is formed, and the accumulated superposition of residual stress of the multi-layer multi-channel welding seam can be avoided by carrying out the stress relief treatment of the method on each layer/channel of the welding seam.
Drawings
FIG. 1 is a schematic structural view of an apparatus for eliminating residual stress of a weld according to the present invention.
FIG. 2 is a schematic diagram of a method of eliminating residual stress in a weld according to the present invention.
Reference numerals illustrate:
1. Roller, loading mechanism, running part, track, controller, and TIG welding gun.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or in communication, directly connected, or indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.
It is also to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Various structural schematic diagrams according to the disclosed embodiments of the present invention are shown in the accompanying drawings. The figures are not drawn to scale, wherein certain details are exaggerated for clarity of presentation and may have been omitted. The shapes of the various regions, layers and their relative sizes, positional relationships shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
Referring to fig. 1, the device for eliminating residual stress of a TIG welding seam provided by the embodiment comprises a roller 1, a loading mechanism 2, a running part 3, a track 4 and a controller 5, wherein in an operating state, the track 4 is arranged on a welded workpiece along the length direction of the welding seam, the running part 3 is arranged on the track 4, the roller 1 and the loading mechanism 2 are arranged on the running part 3, a rotating shaft of the roller 1 is movably connected with the loading mechanism 2, the roller 1 is used for rolling the welding seam under the action of the loading force of the loading mechanism 2, the loading mechanism 2 is connected with a TIG welding gun 6, and the controller 5 is used for controlling the heat input of the TIG welding gun 6, the running speed of the running part 3 and the loading force of the roller 1 of the loading mechanism 2 and is used for starting, suspending and stopping the operation of the device.
Example 2
Referring to fig. 1, the device for eliminating residual stress of a TIG welding seam provided by the embodiment comprises a roller 1, a loading mechanism 2, a running part 3, a track 4 and a controller 5, wherein in an operating state, the track 4 is arranged on a welded workpiece along the length direction of the welding seam, the running part 3 is arranged on the track 4, the roller 1 and the loading mechanism 2 are arranged on the running part 3, a rotating shaft of the roller 1 is movably connected with the loading mechanism 2, the roller 1 is used for rolling the welding seam under the action of the loading force of the loading mechanism 2, the loading mechanism 2 is connected with a TIG welding gun 6 through a connecting rod, and the controller 5 is used for controlling the heat input of the TIG welding gun 6, the running speed of the running part 3 and the loading force of the roller 1 of the loading mechanism 2 and is used for starting, suspending and stopping the operation of the device.
In this embodiment, the track 4 is divided into a straight track and a circular track for TIG straight and girth welds, respectively.
In the present embodiment, the loading force to the roller 1 is set and adjusted by the loading mechanism 2 according to different types of weld metal.
Example 3
Referring to fig. 1, the device for eliminating residual stress of a TIG welding seam provided by the embodiment comprises a roller 1, a loading mechanism 2, a running part 3, a track 4 and a controller 5, wherein in an operating state, the track 4 is arranged on a welded workpiece along the length direction of the welding seam, the running part 3 is arranged on the track 4, the roller 1 and the loading mechanism 2 are arranged on the running part 3, a rotating shaft of the roller 1 is movably connected with the loading mechanism 2, the loading force on the roller 1 is set and regulated through the loading mechanism 2 according to different types of welding seam metals, the loading mechanism 2 is connected with a TIG welding gun 6 through a connecting rod, and the controller 5 is used for controlling the heat input of the TIG welding gun 6, the running speed of the running part 3 and the loading force of the roller 1 of the loading mechanism 2 and is used for starting, suspending and stopping the operation of the device.
In this embodiment, the depth of the weld or groove is no greater than 450mm.
In the embodiment, the distance between the roller and the TIG welding gun is 40-60 mm.
Example 4:
Referring to fig. 1, the device for eliminating residual stress of a TIG welding seam provided by the embodiment comprises a roller 1, a loading mechanism 2, a running part 3, a track 4, a controller 5 and a TIG welding gun 6. The track 4 adopts a straight track, the track 4 is arranged on a welded workpiece along the length direction of a welding seam, the running part 3 is arranged on the track 4, the TIG welding gun 6, the roller 1 and the loading mechanism 2 are arranged on the running part 3, the running part 3 runs along the track 4, the controller 5 controls the heat input of the TIG welding gun 6, the running speed of the running part 3 and the loading force of the roller 1 of the loading mechanism 2, and meanwhile, the running of the whole device can be started, paused and stopped. Wherein the distance between the roller 1 and the TIG welding gun 6 is 40mm, and the loading force is 40kN.
Example 5:
referring to fig. 1, the device for eliminating residual stress of a TIG welding seam provided by the embodiment comprises a roller 1, a loading mechanism 2, a running part 3, a track 4, a controller 5 and a TIG welding gun 6. The track 4 adopts a circular ring track, the track 4 is arranged on a welded workpiece along the length direction of a welding seam, the running part 3 is arranged on the track 4, the TIG welding gun 6, the roller 1 and the loading mechanism 2 are arranged on the running part 3, the running part 3 runs along the track 4, the controller 5 controls the heat input of the TIG welding gun 6, the running speed of the running part 3 and the loading force of the roller 1 of the loading mechanism 2, and meanwhile, the running of the whole device can be started, paused and terminated. The distance between the roller 1 and the TIG welding gun 6 is 60mm, and the loading force is 40kN.
In this embodiment, the loading mechanism 2 may select an electric push rod, a pneumatic cylinder, a hydraulic cylinder, a screw mechanism, or the like as required.
An electric push rod, also called a linear drive, a push rod motor, an electric cylinder or a linear actuator, is an electric drive device that converts the rotational motion of an electric motor into linear reciprocating motion of the push rod.
The working principle of the pneumatic cylinder is that the pressure of compressed air is converted into mechanical energy through pneumatic transmission, so that the mechanism does linear reciprocating motion or swinging and rotating motion. Inside the cylinder, the compressed air drives the plunger in the cavity to reciprocate, so as to output linear or rotary power.
The hydraulic cylinder is a hydraulic actuating element for converting hydraulic energy into mechanical energy, and mainly realizes linear reciprocating motion. The working principle of the hydraulic cylinder is based on pascal's law, and the amplification of force and the change of direction are realized through hydraulic transmission. When hydraulic oil is pumped from an oil tank in the hydraulic system to an oil inlet of the hydraulic cylinder, the pressure of the hydraulic oil in the hydraulic cylinder is increased, so that the piston is subjected to pressure to generate thrust. The magnitude of the thrust force is related to the pressure of the hydraulic oil and the effective working area of the piston.
The working principle of the screw mechanism is based on the screw transmission principle, namely, when the screw shaft rotates, the screw nut is in linear motion along the screw shaft through threaded fit between the screw nut and the screw shaft. The linear motion can realize the operations of pushing, pulling, positioning, fastening and the like of the workpiece by adjusting the rotation speed, the direction and the distance of the screw shaft.
Example 6:
Referring to fig. 1, the method for eliminating residual stress of a TIG welding seam provided in this embodiment is based on the device for eliminating residual stress of a TIG welding seam, the device includes a roller 1, a loading mechanism 2, a running part 3, a track 4 and a controller 5, in an operating state, the track 4 is mounted on a workpiece to be welded along a length direction of the welding seam, the running part 3 is arranged on the track 4, the roller 1 and the loading mechanism 2 are arranged on the running part 3, a rotating shaft of the roller 1 is movably connected with the loading mechanism 2, the roller 1 is used for rolling the welding seam under the action of the loading force of the loading mechanism 2, a TIG welding gun 6 is connected to the loading mechanism 2, and the controller 5 is used for controlling the heat input of the TIG welding gun 6, the running speed of the running part 3 and the loading force of the roller 1 of the loading mechanism 2, and for starting, suspending and stopping the operation of the device at the same time, the method includes:
The track 4 is arranged on a welded workpiece along the length direction of the welding seam, the running part 3 moves freely on the track 4, the controller 5 controls the heat input of the TIG welding gun 6, the running speed of the running part 3 and the roller loading force of the loading mechanism 2 so as to ensure the heating effect and the rolling effect of the TIG welding gun 6 on the welding seam, and the residual stress of the welding seam is eliminated by synchronously following the rolling welding seam.
Referring to fig. 2, the method for eliminating residual stress of a TIG welding seam provided by the embodiment adopts the technical principle that the method of self-melting heating and synchronous rolling of the TIG welding seam is adopted, and compressive stress is generated through plastic deformation at a high temperature state of the welding seam, so that residual tensile stress generated by shrinkage during solidification forming of the welding seam is eliminated.
In this embodiment, the method may set the heat input of TIG welding gun welding, including welding current and arc voltage, according to the thickness of the weld and the type of weld metal.
In the embodiment, the TIG welding gun automatically tracks the arc length according to the shape of the welding line in the running process.
In this embodiment, the method is suitable for the stress relief treatment between layers/channels of multi-layer multi-pass welding, or the stress relief treatment is performed by rolling the welding seam after the whole welding seam is formed.
In this embodiment, the method can be applied to manual TIG welding and automatic TIG welding, and the loading force of the loading mechanism is adjusted according to the type of weld metal.
In this example, the method does not require post-weld heat treatment of the material prone to reheat cracking.
TIG welding is briefly described as follows:
TIG welding, also known as non-consumable inert gas (tunesten INERT GAS WELDING), is a common welding method that is very popular, especially when welding stainless steel 0.5-4.0 mm thick.
TIG welding forms a weld by establishing an arc between an electrode (typically made of tungsten) and a workpiece, heating the metal with the arc to melt it, and contacting the melted metal with another metal surface by controlling the current and stability of the arc. During the welding process, an inert gas (e.g., argon) is fed through the welding torch to form a shield around the arc and over the weld puddle, insulating the air from deleterious effects on the tungsten electrode, the puddle and adjacent heat affected zones.
TIG welding can be classified into manual welding and automatic welding according to the operation mode.
Manual TIG welding (argon tungsten-arc welding) is a welding method requiring manual operation. Manual TIG welding can adopt a high-voltage pulse generator or a high-frequency oscillator to perform non-contact arc striking, the welding gun is inclined, the edge of the end part of the nozzle is contacted with a workpiece, the tungsten electrode is slightly separated from the workpiece, and the tungsten electrode is directed at the welding starting position of the welding seam.
Automated TIG welding (tunesten INERT GAS WELDING) is a method of TIG welding using automated equipment. Compared with manual TIG welding, the automatic TIG welding has higher production efficiency and stability of welding quality.
The automatic TIG welding controls the processes of moving, wire feeding, arc striking, arc extinguishing and the like of a welding gun through automatic welding equipment, so that the automation of welding is realized. In the welding process, inert gases such as argon are sprayed out through a welding gun nozzle to form a protective gas layer, so that the pollution of air to welding seams is prevented, and the welding quality is ensured.
The automatic TIG welding is widely applied to the fields of aerospace, automobile manufacturing, petrochemical industry, electronics and the like, and particularly in occasions with high welding quality requirements, such as welding of precise instruments, pipelines, storage tanks and the like.
While the fundamental and principal features of the invention and advantages of the invention have been shown and described, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art. The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The device for eliminating the residual stress of the TIG weld joint is characterized by comprising a roller, a loading mechanism, a running part, a track and a controller;
When the welding device is in a working state, the track is arranged on a welded workpiece along the length direction of the welding seam, the running part is arranged on the track, the roller and the loading mechanism are arranged on the running part, the rotating shaft of the roller is movably connected with the loading mechanism, the roller is used for rolling the welding seam under the action of the loading force of the loading mechanism, the loading mechanism is connected with a TIG welding gun, and the controller is used for controlling the heat input of the TIG welding gun, the running speed of the running part and the roller loading force of the loading mechanism and simultaneously used for starting, suspending and stopping the running of the device.
2. A device for eliminating residual stress of TIG welding according to claim 1, wherein the track is divided into a straight track and a circular track for TIG straight welding and girth welding, respectively.
3. The TIG weld residual stress relieving apparatus of claim 1, wherein the loading force on the roller is set and adjusted by the loading mechanism according to different types of weld metals.
4. The TIG weld residual stress relieving apparatus of claim 1, wherein the depth of the weld or groove is no greater than 450mm.
5. The device for eliminating residual stress of a TIG welding seam according to claim 1, wherein the distance between the roller and the TIG welding gun is 40-60 mm.
6. The device for eliminating residual stress of a TIG welding seam according to claim 1, wherein the loading mechanism is connected with a TIG welding gun through a connecting rod.
7. A method of eliminating TIG weld residual stress, characterized in that the method is based on an apparatus for eliminating TIG weld residual stress according to any one of claims 1 to 6, comprising:
The track is arranged on a welded workpiece along the length direction of the welding seam, the running part moves freely on the track, and the controller controls the heat input of the TIG welding gun, the running speed of the running part and the roller loading force of the loading mechanism so as to ensure the heating effect and the rolling effect of the TIG welding gun on the welding seam.
8. The method of eliminating residual stress of TIG welding according to claim 7, wherein the controller sets a heat input of TIG welding gun welding according to a thickness of the welding line and a kind of the welding line metal, the heat input including a welding current and an arc voltage.
9. The method of eliminating residual stress of a TIG weld according to claim 7, wherein the TIG welding gun automatically performs arc length tracking according to the shape of the weld during traveling.
10. A method of eliminating TIG weld residual stress according to claim 7, wherein the method is suitable for a multi-layer multi-pass welded layer/pass stress elimination treatment or a roll weld stress elimination treatment after the entire weld is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510026240.7A CN119800054A (en) | 2025-01-08 | 2025-01-08 | A method and device for eliminating residual stress of TIG weld |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202510026240.7A CN119800054A (en) | 2025-01-08 | 2025-01-08 | A method and device for eliminating residual stress of TIG weld |
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| CN119800054A true CN119800054A (en) | 2025-04-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190037A (en) * | 1998-02-11 | 1998-08-12 | 王保东 | Residual stress eliminating method for welding seam in welded thin-wall pipe |
| CN202655772U (en) * | 2012-05-18 | 2013-01-09 | 沈阳飞机工业（集团）有限公司 | Automatic argon welding device |
| RU2708126C1 (en) * | 2019-04-08 | 2019-12-04 | Открытое Акционерное Общество "Российские Железные Дороги" | Method for elimination of rail head crushing and wear defect in weld joint by electric arc surfacing |
| CN115213530A (en) * | 2022-07-26 | 2022-10-21 | 华能国际电力股份有限公司 | Method and device for cleaning sand blowing between narrow-gap multilayer TIG welding layers |
| CN115673493A (en) * | 2021-07-30 | 2023-02-03 | 中国石油天然气集团有限公司 | Device for cooling submerged arc welding steel pipe weld and reducing residual stress |
-
2025
- 2025-01-08 CN CN202510026240.7A patent/CN119800054A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190037A (en) * | 1998-02-11 | 1998-08-12 | 王保东 | Residual stress eliminating method for welding seam in welded thin-wall pipe |
| CN202655772U (en) * | 2012-05-18 | 2013-01-09 | 沈阳飞机工业（集团）有限公司 | Automatic argon welding device |
| RU2708126C1 (en) * | 2019-04-08 | 2019-12-04 | Открытое Акционерное Общество "Российские Железные Дороги" | Method for elimination of rail head crushing and wear defect in weld joint by electric arc surfacing |
| CN115673493A (en) * | 2021-07-30 | 2023-02-03 | 中国石油天然气集团有限公司 | Device for cooling submerged arc welding steel pipe weld and reducing residual stress |
| CN115213530A (en) * | 2022-07-26 | 2022-10-21 | 华能国际电力股份有限公司 | Method and device for cleaning sand blowing between narrow-gap multilayer TIG welding layers |
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