CN115890037A - Welding method for T-shaped structure penetration fillet weld - Google Patents
Welding method for T-shaped structure penetration fillet weld Download PDFInfo
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- CN115890037A CN115890037A CN202211505476.1A CN202211505476A CN115890037A CN 115890037 A CN115890037 A CN 115890037A CN 202211505476 A CN202211505476 A CN 202211505476A CN 115890037 A CN115890037 A CN 115890037A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a welding method of a T-shaped structure penetration fillet weld, which is applied to the welding of a T-shaped structure consisting of a panel and a web plate, relates to the technical field of welding and comprises the following steps: grooving the web plate; assembling the panel and the web plate to ensure that the groove end of the web plate is aligned with the panel; positioning and welding the back surface of the groove of the web plate and the panel to fix the web plate and the panel; driving a welding head to weld the web groove and the panel by using a profiling trolley; and driving the welding head to weld the back of the groove of the web plate and the panel by using the profiling trolley. The welding method of the penetration fillet weld of the T-shaped structure reduces labor cost, improves welding quality and welding efficiency, and is beneficial to batch production operation.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a welding method of a T-shaped structure penetration fillet weld.
Background
The existing T-shaped structure penetration fillet weld usually adopts a manually operated welding gun to complete welding work, the welding process is greatly influenced by the operation stability of a welder, and the existing welding mode cannot meet the requirement of large-batch and long-weld-seam welding.
Disclosure of Invention
The invention aims to provide a welding method of a T-shaped structure penetration fillet weld, and aims to solve the problem of batch production in the prior art.
In order to solve the technical problem, the invention adopts the following technical scheme:
a welding method of a T-shaped structure penetration fillet weld is applied to welding of a T-shaped structure consisting of a panel and a web plate, and comprises the following steps:
grooving the web plate;
assembling the face plate and the web plate to ensure that the bevel end of the web plate is aligned with the face plate;
positioning and welding the back surface of the groove of the web plate and the panel to fix the web plate and the panel;
driving a welding head to weld the web groove and the panel by using a profiling trolley;
and (4) driving the welding head to weld the back of the groove of the web plate and the panel by using the profiling trolley.
In an optional embodiment of the application, the face plate and the web plate are assembled, the groove end of the web plate is aligned with the face plate, the web plate is horizontally placed, and the welding head is in a flat welding position for welding.
In this application optional embodiment, drive the welding head with the profile modeling dolly and weld web groove and panel including:
welding the joint of the groove and the panel to form backing welding;
sequentially welding the groove, the backing welding surface and the panel to form filling welding until the groove is filled;
and sequentially welding the web plate, the filling welding surface and the panel to form a cover surface welding.
In an optional embodiment of the present application, the groove, the backing weld surface, and the groove are welded in sequence to form a filling weld until the groove is filled, and the groove is welded in sequence from the web to the panel.
In an optional embodiment of the application, when the profiling trolley is used for driving the welding head to weld the groove of the web plate and the panel, the oxide on the surface to be welded needs to be cleaned before welding.
In an optional embodiment of the present application, when the carbon equivalent of the web or the panel is greater than 0.6%, the profiling trolley drives the welding head to weld the groove of the web and the panel, and then the post-heat treatment is performed at 200-250 ℃ for a heat preservation time of more than 2 h.
In an optional embodiment of the application, before the profiling trolley drives the welding head to weld the back of the groove of the web and the panel, the back of the groove of the web and the panel are back-gouged.
In an optional embodiment of the application, when the thickness of the web plate is greater than 25mm, the profiling trolley is used for driving the welding head to weld the groove and the panel of the web plate, and the profiling trolley is used for driving the welding head to weld the back of the groove and the panel of the web plate alternately.
In an optional embodiment of the application, the welding mode of the profiling trolley clamping welding head is argon-rich welding, and the welding wire is a gas shielded welding wire.
In an optional embodiment of the application, when the carbon equivalent of the web or the panel is greater than 0.4%, the profiling trolley drives the welding head to preheat the web and the panel before welding the groove of the web and the panel, and when the thickness of the web is less than 40mm, the preheating temperature is 100-130 ℃; when the thickness of the web plate is more than or equal to 40mm, the preheating temperature is 120-150 ℃.
The welding method of the penetration fillet weld of the T-shaped structure disclosed by the invention has the beneficial effects that: the method comprises the steps of chamfering a web plate to be welded, assembling the chamfered web plate and a panel, and fixing the web plate and the panel by performing positioning welding on the back of the chamfered surface of the web plate and the panel. The profiling trolley drives the welding head to weld the groove of the web plate and the panel to form a first welding, the profiling trolley drives the welding head to weld the back face of the groove of the web plate and the panel to form a second welding, and the first welding and the second welding are combined to form a penetration fillet weld. The profiling trolley drives the welding head to weld, so that the problem that manual fatigue and the like affect the welding quality during batch welding is solved, the overall welding efficiency and welding quality are improved, labor is liberated, the labor cost is reduced, and the improvement of mechanical operation is facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method of welding a penetration fillet weld of a T-shaped configuration according to the present invention;
FIG. 2 is a flowchart illustrating a substep of step S40 of a method of welding a penetration fillet weld of a T-shaped structure according to the present invention;
FIG. 3 is a schematic structural diagram of a welding method for a penetration fillet weld of a T-shaped structure according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features.
In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "communicate," "mount," "connect," and "connect" are to be construed broadly, e.g., as being fixed or removable or integral; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.
The preferred embodiments of the present disclosure are further described in detail below with reference to fig. 1-3 of the present disclosure.
Referring to fig. 1 and 3, an embodiment of the present application provides a method for welding a T-shaped penetration fillet weld, and the method for welding a T-shaped penetration fillet weld according to the embodiment of the present application can be applied to a welding operation of a T-shaped structure. The profiling trolley replaces manual welding, welding is carried out in a multi-layer and multi-pass welding mode, labor cost is effectively reduced, welding efficiency and welding quality of welding are improved, and batch welding operation can be well adapted.
Referring to fig. 1, in an embodiment of the present application, a method for welding a penetration fillet weld of a T-shaped structure is applied to welding a T-shaped structure composed of a panel and a web, and includes the following steps:
and S10, grooving the web plate. The bevel of the groove is smooth, the welding wire can abut against the bottom of the groove close to the panel when extending out of the welding head by 12-18 mm, and the inclination angle of the groove is larger than 50 degrees.
S20, assembling the face plate and the web plate to enable the groove end of the web plate to be aligned with the face plate. The contact surface of the panel and the web plate can be a curved surface, and the web plate and the panel are relatively vertical, so that smooth penetration fillet weld is ensured, and the panel and the web plate are welded firmly.
And S30, performing positioning welding on the back surface of the groove of the web plate and the panel to fix the web plate and the panel. The positioning welding is performed between the back of the groove of the web plate and the panel, the welding between the groove and the panel is not influenced, and after the welding between the groove and the panel, the positioning welding is processed by back chipping, and the whole welding strength is not influenced.
And S40, driving the welding head to weld the web groove and the panel by using the profiling trolley. The profiling trolley has the function of moving according to the welding position, drives the welding head to weld the web plate groove and the panel, reduces the labor cost, realizes mechanical operation, is favorable for batch welding, and improves the overall welding quality.
And S50, driving the welding head to weld the back of the groove of the web plate and the panel by using the profiling trolley. And after the profiling trolley drives the welding head to weld the groove of the web plate and the panel, the profiling trolley drives the welding head to weld the back of the groove of the web plate and the panel, so that a penetration fillet weld is formed between the groove of the web plate and the panel.
In step S20, the web is horizontally placed, and the welding head is in a flat welding position for welding. The welding smoothness between the groove of the welding head to the web and the panel is improved, and the welding strength is improved.
Referring to fig. 2, step S40 includes:
and S41, welding the joint of the groove and the panel to form backing welding.
And S42, sequentially welding the groove, the backing welding surface and the panel to form filling welding till the groove is filled.
And S43, sequentially welding the web plate, the filling welding surface and the panel to form a cover surface welding.
Step S40 adopts multilayer multi-pass welding, step S41 drives the welding head to weld at the joint of the groove and the panel through the profiling trolley to form backing welding, and then drives the welding head to weld in sequence among the groove, the backing welding surface and the panel through the profiling trolley to form filling welding until the groove is filled, wherein the filling welding is also formed by layered multi-pass welding.
Referring to fig. 3, when backing welding is performed, an included angle between a welding wire of a welding head and a welding direction is 85 to 95, and the welding wire points to the end of the groove. When filling welding is carried out, welding is carried out on a welding bead close to the side of the web firstly, welding wires point to the intersection of backing welding and the side groove face of the web, the included angle between the welding wires and the welding direction is 80-90 degrees, welding wires of a rear cover face point to the intersection point of the backing welding and the backing welding formed in the previous step and the intersection point of the backing welding and the side groove face of the web, the included angle between the welding wires and the welding direction is 55-80 degrees, namely, a plurality of filling welding are formed by sequentially welding from the web to the side groove face at the groove until the groove is filled. When the cover surface welding is carried out, the welding is carried out in sequence from the web side to the panel side, and the welding angle of the welding wire is consistent with that of the filling welding. The welding wire fuses between a plurality of welding beads of guaranteeing backing weld, filling welding and capping welding with the contained angle of welding direction, promotes welding quality.
Welding parameters during welding in step S40 are as shown in table 1,
TABLE 1 parameters for profiling trolley to drive welding head to weld web groove and panel
Wherein the protective gas is argon.
And step S42, sequentially welding the grooves from the web plate to the panel. The welding firmness is improved.
When the profiling trolley is used for driving the welding head to weld the web groove and the panel, the oxide on the surface to be welded needs to be cleaned and grinded before welding. The welding current is large, elements such as silicon in a molten pool are easily oxidized to form oxides to cover the weld toes, the welding beads are formed by adopting non-swing welding, a 'clamping groove' is easily formed between the weld beads, the oxides at the clamping groove are mixed into the molten pool in the welding process, fine and point-shaped slag inclusions are easily formed when the oxides are not discharged in time, and the welding is not firm, so that the welding quality is affected.
When the carbon equivalent of the web plate or the panel is more than 0.6 percent, the profiling trolley drives the welding head to weld the groove of the web plate and the panel, and then the post-heat treatment is carried out at the temperature of between 200 and 250 ℃ for more than 2 hours. The method reduces the hardened structure of the welding joint, reduces the content of diffusible hydrogen in the welding seam, releases the stress of the web plate and the panel, avoids the cracking of the welding position and reduces the deformation after cooling.
And (3) driving the welding head to back the groove of the web plate and back the panel by using the profiling trolley before welding the groove of the web plate and the panel, and back chipping the groove of the web plate and the panel.
When the thickness of the web plate is larger than 25mm, the profiling trolley is used for driving the welding head to weld the groove of the web plate and the panel, and the profiling trolley is used for driving the welding head to weld the back of the groove of the web plate and the panel alternately. One side is prevented from being overheated and deformed in the welding process, and the whole welding strength is favorably improved.
The welding mode of the profiling trolley clamping welding head is argon-rich welding, and the welding wire is a gas-shielded welding wire.
When the carbon equivalent of the web or the panel is more than 0.4%, the profiling trolley drives the welding head to preheat the web and the panel before welding the groove of the web and the panel, and when the thickness of the web is less than 40mm, the preheating temperature is 100-130 ℃; when the thickness of the web plate is more than or equal to 40mm, the preheating temperature is 120-150 ℃. The hardening structure of the welding joint is reduced, and cracks are avoided. And the preheating is carried out in advance to reduce the temperature difference of a welding area and reduce the overheating deformation of a panel and a web plate in the welding process.
The welding method of the penetration fillet weld of the T-shaped structure disclosed by the invention has the beneficial effects that: the method comprises the steps of chamfering a web plate to be welded, assembling the chamfered web plate and a panel, and fixing the web plate and the panel by performing positioning welding on the back of the chamfered surface of the web plate and the panel. The profiling trolley drives the welding head to weld the groove of the web plate and the panel to form a first welding, then the profiling trolley drives the welding head to weld the groove back of the web plate and the panel to form a second welding, and the first welding and the second welding are combined to form a penetration fillet weld. Drive the bonding tool through the profile modeling dolly and weld, solved artifical tired out when welding in batches etc. influence welding quality's the condition, improved holistic welding efficiency and welding quality to liberated the manual work, reduced the cost of labor, be favorable to improving mechanized operation.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
While the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present disclosure may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. A welding method of a T-shaped structure penetration fillet weld is applied to welding of a T-shaped structure consisting of a panel and a web plate, and is characterized by comprising the following steps:
beveling the web plate;
assembling the panel and the web plate to ensure that the groove end of the web plate is aligned with the panel;
positioning and welding the back surface of the groove of the web plate and the panel to fix the web plate and the panel;
driving a welding head to weld the web groove and the panel by using a profiling trolley;
and (4) driving the welding head to weld the back of the groove of the web plate and the panel by using the profiling trolley.
2. The method of claim 1, wherein the face plates and the web are assembled such that the beveled end of the web faces the face plates, the web is horizontally disposed, and the weld head welds in a flat position.
3. The method for welding the penetration fillet weld of the T-shaped structure according to claim 1, wherein the step of driving the welding head by the profiling trolley to weld the web groove and the panel comprises the following steps:
welding the joint of the groove and the panel to form backing welding;
sequentially welding the groove, the backing welding surface and the panel to form filling welding until the groove is filled;
and sequentially welding the web plate, the filling welding surface and the panel to form a cover surface welding.
4. The method according to claim 3, wherein the groove, the backing weld surface and the groove are welded in sequence to form a filler weld until the groove is filled, and the groove is welded in sequence from the web to the panel.
5. The method for welding the penetration fillet weld of the T-shaped structure as claimed in claim 4, wherein when the profiling trolley is used for driving the welding head to weld the web groove and the panel, the oxide on the surface to be welded needs to be cleaned before welding.
6. The method for welding the penetration fillet weld of the T-shaped structure according to any one of claims 1 to 5, wherein when the carbon equivalent of the web or the face plate is more than 0.6%, the profiling trolley drives the welding head to weld the groove of the web and the face plate, and then the post-heat treatment is carried out at 200 to 250 ℃ for more than 2 hours.
7. The welding method of the penetration fillet weld of the T-shaped structure as claimed in claim 6, wherein the back of the groove of the web and the panel are back-gouged before the profiling trolley drives the welding head to weld the back of the groove of the web and the panel.
8. The method for welding the penetration fillet weld of the T-shaped structure as claimed in claim 7, wherein when the thickness of the web is greater than 25mm, the profiling trolley drives the welding head to weld the groove and the panel of the web, and the profiling trolley drives the welding head to weld the back of the groove and the panel of the web alternately.
9. The welding method of the T-shaped structure penetration fillet weld according to any one of claims 1 to 5, wherein the welding mode of the profiling trolley clamping welding head is argon-rich welding, and the welding wire is a gas shielded welding wire.
10. The welding method of the penetration fillet weld of the T-shaped structure as claimed in claim 9, wherein when the carbon equivalent of the web or the face plate is greater than 0.4%, the profiling trolley drives the welding head to preheat the web and the face plate before welding the groove of the web and the face plate, and when the thickness of the web is less than 40mm, the preheating temperature is 100-130 ℃; when the thickness of the web plate is more than or equal to 40mm, the preheating temperature is 120-150 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211505476.1A CN115890037A (en) | 2022-11-28 | 2022-11-28 | Welding method for T-shaped structure penetration fillet weld |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211505476.1A CN115890037A (en) | 2022-11-28 | 2022-11-28 | Welding method for T-shaped structure penetration fillet weld |
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| CN115890037A true CN115890037A (en) | 2023-04-04 |
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| CN202211505476.1A Pending CN115890037A (en) | 2022-11-28 | 2022-11-28 | Welding method for T-shaped structure penetration fillet weld |
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- 2022-11-28 CN CN202211505476.1A patent/CN115890037A/en active Pending
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