CN108941949A - Reduce the welding method of heavy wall steel construction site welding stress deformation - Google Patents
Reduce the welding method of heavy wall steel construction site welding stress deformation Download PDFInfo
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- CN108941949A CN108941949A CN201810964191.1A CN201810964191A CN108941949A CN 108941949 A CN108941949 A CN 108941949A CN 201810964191 A CN201810964191 A CN 201810964191A CN 108941949 A CN108941949 A CN 108941949A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/003—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to controlling of welding distortion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/022—Making profiled bars with soldered or welded seams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The welding method of heavy wall steel construction site welding stress deformation is reduced, it is related to a kind of welding method.The present invention solves the problems, such as existing steel construction butt weld technologies for steel, and to adjust, residual strain by welding is more passive, there are stability and anti-fatigue performance are poor for cumbersome and difficult and welded joint structure.Several built-in webs inlayed are arranged at intervals with along the length direction of weld seam in banjo fixing butt jointing welding groove, " skeleton system structure " is collectively formed by the built-in web that welding groove wall and several of base material are inlayed；Built-in web is welded: guaranteeing to fuse completely between built-in web and the base material of banjo fixing butt jointing welding groove wall using back chipping weldering；After " the skeleton system structure " of banjo fixing butt jointing is welded molding, it is filled welding in the partition space that the built-in web that welding groove wall and several of base material are inlayed is surrounded, carries out cover welding finally along the longitudinal measure direction of weld seam.The present invention is for reducing heavy wall steel construction site welding stress deformation.
Description
Technical field
The present invention relates to a kind of welding methods for reducing the site welding stress deformation of heavy wall steel construction, belong to welding structure skill
Art field.
Background technique
Steel construction has many advantages, such as that intensity height, good toughness, anti-seismic performance is good, speed of application is fast, is very suitable to modern project
Structure to it is towering, greatly across the demand with heavy duty development, engineer application is increasing.Super high-rise building, large span architecture with greatly across
In bridge, heavy-duty industrial workshop and unique construction, steel plate needed for the main bearing members such as beam, column, support, shear wall, truss is thick
It spends increasing.Even if using can give full play to two kinds of materials of steel and concrete respectively advantage, be substantially reduced steel plate wall thickness
Composite structure, also increasingly increasing to meet thickness of steel product used by requirement of engineering, it is most thick to have reached 100mm or more.
In usual steel construction in-site installation, the welding point of steel member, predominantly " pipe docking " or " plate docking " etc. are connect
Capitiform formula.Welding groove form is mainly X-type groove (welding by both sides) or double V-groove (back chipping weldering or padded single welding).?
Under the condition of this welding point form, molten bath, due to the presence of welding temperature gradient, is laterally arrested in process of setting
When Shu Du is smaller, the state of " uncontrolled " is substantially presented in the shrinkage of filling metal and its volume variation in groove, and welding becomes
Shape is usually larger (see attached drawing 1).
It is well known that welding stress is that balance is (flat inside weldment under conditions of the effect of no other additional external forces
Weigh power system).When the uneven temperature field caused by welding process not yet disappears, this stress and deformation in weldment are known as transient state
Welding stress and distortion；Stress after field of welding temperature disappears is known as remaining welding stress and distortion with deformation.In actual weldering
In termination process, due to the acute variation and its fluctuation of field of welding temperature, the welding stress field of uneven distribution is formd.In weld seam
It is mainly exactly to cause welding deformation (thermal stress of welding and structural stress etc., will pass through shape when the welding stress of middle generation is larger
Become and discharge).In addition, temperature gradient and non-uniform stress, in addition unfavorable structural condition, it is also possible to lead to local welding
Stress is concentrated.When its tensile stress of certain a moment is more than the yield strength of metal, local plastic deformation will occur, to discharge portion
The component of stress.But the metal yield effect of welded seam area, while the rigidity of welding point is reduced, consequence will affect the use of steel structure
Performance.If the welding residual stress not discharged is excessive, in some instances it may even be possible to generate weld crack.
In steel construction or steel-concrete combined structure, the site welding of heavy wall steel construction is constructed, due to welding metal
Loading is bigger, and correspondingly welding stress and deformation are also big, therefore its control all the more becomes an intractable technology hardly possible
Topic.
The welding deformation controlling method of traditional steel construction field joint weldering, can only the weldering amount in steel member wall thickness direction and
The deviation size of weld size, as the main control for influencing structure integral solder deformation (verticality, angular deformation of structure etc.)
Factor processed, gives and pays close attention to.Usually according to welding welding process and weld seam cooling procedure observing and controlling as a result, mainly by with
Under several aspects handled:
1, weld gap size is directly proportional to deformation size, therefore measures a upper component (such as steel pipe joint before welding in advance
Column) deviation, according to calculate at groove use mechanical grinding, so that weld gap is artificially kept almost the same.
2, using symmetrical, layering and segmented welding, the welding ginseng of the selections such as lift height, section length and speed of welding
Number makes every effort to close.This method is synchronous layered frequently with two people, is segmented and is symmetrically welded, when the bead thickness of side welding is larger,
The deformation on this one side also can be corresponding larger, therefore after circle is handed in every layer of welding, need to detect a secondary member deflection (verticality and
Angular deformation etc.), to the bead thickness for deforming the opposite reduction welding in lower welding together of biggish side, as far as possible control steel pipe column
Verticality remained unchanged in the welding stage, the welding of doing over again of away minor segment can be made when necessary.
3, some interim rigid constraint measures used when being docked as component, when main function is Steel Structure Installation
It can guarantee the machinery positioning measure of whole geometry dimensional accuracy (concentricity and verticality etc.).It is other that such as " prestrain method is pre-
If regulating measures such as reversed dips ", it can not also well solve weld seam and aggravate welding in the variation of field of welding temperature unevenness and answer
The practical problem of power and deformation.
In conclusion adjusted using existing steel construction butt weld technologies for steel residual strain by welding it is more passive, it is cumbersome and
Difficult and welding point structural stability and anti-fatigue performance are poor.
Summary of the invention
The present invention is that the existing steel construction butt weld technologies for steel of solution is more passive, cumbersome and tired to adjust residual strain by welding
It is difficult to and welded joint structure has stability and anti-fatigue performance difference, and then a kind of reductions heavy wall steel construction is provided and is showed
The welding method of field welding stress deformation.
The technical solution adopted by the present invention to solve the above technical problem is:
The welding method of reduction heavy wall steel construction site welding stress deformation of the invention is realized according to following steps:
Step 1: the material for choosing built-in web is identical as the material of heavy wall steel construction base material；The plane of built-in web is several
What shape and its overall size setting identical as the cross section of welding groove；
Step 2: being arranged at intervals with built in several inlay in banjo fixing butt jointing welding groove along the length direction of weld seam
Web collectively forms " skeleton system structure " by the built-in web that welding groove wall and several of base material are inlayed；
Step 3: for the weld groove of round tube banjo fixing butt jointing: the minimum spacing of the two neighboring built-in web of arrangement is
314mm；For the weld groove of non-round banjo fixing butt jointing, arrange that the minimum spacing of two neighboring built-in web is 200mm；Heavy wall
2 times of the thickness of steel construction base material≤built-in web plate thickness；
Step 4: built-in web is welded: two-sided bevel is opened in the thickness direction two sides of built-in web, i.e., built-in web and thickness
There are welded gaps for wall steel pipe contact surface, are guaranteed between built-in web and the base material of banjo fixing butt jointing welding groove wall using back chipping weldering
Fusion completely；
Step 5: after " the skeleton system structure " of banjo fixing butt jointing is welded molding, in the welding groove wall of base material and several
The partition space that the built-in web inlayed is surrounded is filled welding, carries out capping finally along the longitudinal measure direction of weld seam
Welding.
Further, the welding manner in step 5 is to be symmetrically welded, be layered welding or segmented welding.
Further, the profile for the built-in web inlayed is wedge shaped.
Further, the plate thickness direction bilateral bevel of built-in web, and use back chipping Welding.
Further, it is uniformly arranged what several were inlayed along fusion length direction at the welding groove of banjo fixing butt jointing
Built-in web.
The beneficial effects of the present invention are:
One, skeletal support is formed, welding deformation is reduced:
For the welding structure of heavy wall steel construction, the reason of generating welding deformation mainly includes two aspects: one is
Angular deformation of the cross-direction shrinkage of weld metal caused by the uneven distribution (mainly being determined by bevel shape) in plate thickness direction；Its
Second is that the neutral axis of component is usually all deviateed in the position of weld seam, active force caused by weld contraction will lead to component and bend
Deformation.The effect that two kinds of welding deformations are overlapped mutually shows as rod piece angle of arrival deviation interconnected.
Built-in web is inlayed and is welded in welding groove, and " the skeleton system structure " of composition is remarkably improved welding and connects
The rigidity of structure of head position；Neighbouring weld metal can be resisted and be limited to the built-in web for closing on welding position in cooling procedure
Pressure caused by shrinking, and therefore reduce the cross-direction shrinkage amount of weld metal, and then reduce angular deformation；Meanwhile in contrast
Built-in web in the neutral axisymmetric other side then will receive the effect of tensile stress, this built-in web in symmetric position
Bear drawing-pressure reversal of stress effect be formed by torque can be with the deflection deformation of resistant members；As long as built-in web has enough
Rigidity, do not generate plastic deformation, so that it may play the role of reduce deflection deformation.It can be seen that built-in web can both subtract
Small angular deformation, and deflection deformation can be resisted, therefore the welding deformation in steel construction can be significantly reduced.
In addition, the method for built-in web is compared with using the method for external constraint control welding deformation, external constraint is being welded
It is usually after the completion of termination process to require to be removed more, due to the presence of welding residual stress and component internal stress, component can be made to produce
Raw rebound, thus reduce the effect of external constraint control welding deformation.And the method for built-in this interior constraint of web was being welded
It is not required to remove after the completion of journey, so as to avoid the rebound of component, control can be maintained to deform for a long time long-acting.
The whole validity and stability of built-in web this " skeleton system structure ", can be by welding residual stress, strain
Endangering to welded unit bring reduces, and also helps and simplifies welding Heat Treatment Measures, it could even be possible to cancelling, to reduce
Site welding construction cost.
Two, weld seam is divided into multiple unit areas by built-in web along longitudinal direction, will change the propagation behavior of fatigue crack:
Under conditions of web skeleton system structure built in welding groove, the biggish weld metal of volume can be partitioned into
Several lesser regions；The weld metal tension due to the compression of built-in web, so that transverse weld residual stress is in whole weldering
It sews on and shows as the situation that tensile stress replaces variation with compression.If there are fatigue crack and existed along weld seam inside weld seam
When the tendency of extension, if at crack propagation to built-in web, the compression area of residual stress field, tired external applied load will be entered
It needs after overcoming residual compressive stress crackle continuation can just extended forward, thus will lead to the crack tip stress in these regions
Intensity factor reduces.The material (hot rolling material) of built-in web is for weld metal, fracture toughness with higher, it will
Play the role of inhibiting crack Propagation.
To sum up, the present invention relates to welding structure and its joint form, weldering when being for the butt welding of heavy wall steel construction
Connect groove space geometry size (volume) it is larger thus aggravate welding stress, strain unfavorable factor, thus in welding groove
It inlays in advance and is welded by several steel webs and constitutes " skeleton system structure ", and gold finally is filled into the welding of itself and weld seam
Category fuses into one, and can be regarded as a kind of special steel structure system, have good structural stability；Also due to the present invention
With the effect for reducing welded fatigue crack growth rate, it is particularly well suited to dynamic load welding structure.Moreover, having
The butt welded joint form of " skeleton system structure ", in comparison with common traditional butt welded joint form, in welding groove
Volume and its weld metal loading it is bigger in the case where, greatly reduce welding stress harm, greatly reduce structure change
Shape amount, to improve structural stability；Moreover, the butt welded joint form with " skeleton system structure ", in comparison with general
Logical traditional butt welded joint formFor, in the case where the volume of welding groove and its bigger weld metal loading,
The advantage for reducing welding stress harm and control structure deflection can be all the more shown, to improve the stability of structure.
Detailed description of the invention
Fig. 1 be the built-in web of reduction heavy wall steel construction site welding stress deformation of the invention main view (example it
One: base material plate thickness is 60mm)；
Fig. 2 be the built-in web of reduction heavy wall steel construction site welding stress deformation of the invention left view (example it
One: base material plate thickness is 60mm)；
Fig. 3 be the built-in web of reduction heavy wall steel construction site welding stress deformation of the invention top view (example it
One: base material plate thickness is 60mm)；
Fig. 4 is the sectional side elevation of banjo fixing butt jointing welding groove of the invention (pipe is to pipe banjo fixing butt jointing form)；
Fig. 5 is in the welding method of reduction heavy wall steel construction site welding stress deformation of the invention " skeleton system structure "
Schematic perspective view (round steel pipe)；
Fig. 6 is in the welding method of reduction heavy wall steel construction site welding stress deformation of the invention " skeleton system structure "
Schematic perspective view (rectangular steel pipe).
Specific embodiment
Specific embodiment 1: as shown in figs. 1 to 6, the reduction heavy wall steel construction site welding stress of present embodiment becomes
Steps are as follows for the welding method of shape:
Step 1: the material for choosing built-in web is identical as the material of heavy wall steel construction base material；The plane of built-in web is several
What shape and its overall size setting identical as the cross section of welding groove；
Step 2: being arranged at intervals with built in several inlay in banjo fixing butt jointing welding groove along the length direction of weld seam
Web collectively forms " skeleton system structure " by the built-in web that welding groove wall and several of base material are inlayed；
Step 3: for the weld groove of round tube banjo fixing butt jointing: the minimum spacing of the two neighboring built-in web of arrangement is
314mm；For the weld groove of non-round banjo fixing butt jointing, arrange that the minimum spacing of two neighboring built-in web is 200mm；Heavy wall
2 times of the thickness of steel construction base material≤built-in web plate thickness；
Step 4: built-in web is welded: two-sided bevel is opened in the thickness direction two sides of built-in web, i.e., built-in web and thickness
There are welded gaps for wall steel structure contact surface, are guaranteed between built-in web and the base material of banjo fixing butt jointing welding groove wall using back chipping weldering
Fusion completely；
Step 5: after " the skeleton system structure " of banjo fixing butt jointing is welded molding, in the welding groove wall of base material and several
The partition space that the built-in web inlayed is surrounded is filled welding, carries out capping finally along the longitudinal measure direction of weld seam
Welding.
For the weld groove of round tube banjo fixing butt jointing in step 2, arrange that the minimum spacing of two neighboring built-in web is
314mm, i.e. modulus factor take " pi ", the considerations of according to construction technology, convenient for along the circumferential direction equal part, are convenient for circumference down
It is operated with welding；For the welding groove of non-round banjo fixing butt jointing, arrange that the minimum spacing of two neighboring built-in web is
200mm considers according to the optimization of construction technology, convenient for welding procedure operation without spatial obstacle, avoids the occurrence of construction dead angle.
Specific embodiment 2: welding manner of the present embodiment in step 5 is to be symmetrically welded, be layered welding or divide
Section welding.So operation can preferably control welding stress on the basis for the skeletal support effect that built-in web is formed
And its equalization of malformation, and minimize the longitudinal measure stress of weld metal.Other operating procedures and specific reality
It is identical to apply mode one.
Specific embodiment 3: as shown in Figures 1 to 3, the profile for the built-in web that present embodiment is inlayed is wedge shaped.According to
The geometry in specific welding groove section, the projection in built-in web plate thickness direction is generally trapezoidal, etc. three haunch shapes, differ
Side triangle or trapezium etc..It is designed in this way, plane geometric shape and its size and the weldering of built-in web can be made
The cross section for connecing groove is identical, is embedded in welding groove convenient for the seamless unoccupied place of built-in web, reinforces " the support work of internal frame
With ".Other compositions and connection relationship are the same as one or two specific embodiments.
Specific embodiment 4: as shown in Fig. 2, the two-sided bevel of weld side of built-in web and groove wall.It is designed in this way,
It is that must assure that fuse completely between the built-in web inlayed in banjo fixing butt jointing welding groove and the base material of welding groove wall, and adopt
It is welded with back chipping, prevents welding defect.Other compositions and connection relationship are the same as the specific implementation mode 3.
Specific embodiment 5: as shown in Figure 5 and Figure 6, present embodiment is at the welding groove of banjo fixing butt jointing along weldering
Seam length direction is uniformly arranged several built-in webs inlayed.So operation, be enable steel web plane geometric shape and
Its size is identical as the cross section of welding groove, is embedded in welding groove convenient for the seamless unoccupied place of built-in web, plays built-in bone
The welding structure deformation in the construction of steel construction in-site installation can be significantly reduced in " supporting role " of frame.Other operating procedures with
Specific embodiment one, 2 is four identical.
Case study on implementation:
As shown in Figure 1-3, when pipe wall thickness or steel plate thickness are 60mm: the height of the big end side surface of built-in web is
47mm, the ramp length of built-in web are 67mm, and the length of built-in web is 55mm, and the width of built-in web is 30mm.
In the inner space of welding groove, along the longitudinal direction of weld seam, several transverse directions are inlayed and are welded in preparatory compartment of terrain distribution
Steel web built in (vertical weld axis) makes welding groove integrally form " skeleton system structure ", and final built-in web will
It fuses into one with weld metal, can have good structural stability.
In the uneven variation of field of welding temperature, the volume that " skeleton system structure " can play limitation weld metal becomes
Change the remarkable effect of (expansion and shrink), " built-in web " weld seam longitudinal subdivision and can shorten, and horizontal tensile stress is by portions thereof
And its homogenization is enabled, the collection that comprehensive effect is the reduction of welding stress neutralizes the structural strain's amount of structure.
Under conditions of web skeleton system structure built in welding groove, the biggish weld metal of volume can be partitioned into
Several lesser regions.The weld metal tension due to the compression of built-in web, so that transverse weld residual stress is in whole weldering
It sews on and shows as the situation that tensile stress replaces variation with compression.If there are fatigue crack and existed along weld seam inside weld seam
When the tendency of extension, if at crack propagation to built-in web, the compression area of residual stress field, tired external applied load will be entered
It needs after overcoming residual compressive stress crackle continuation can just extended forward, thus will lead to the crack tip stress in these regions
Intensity factor reduces.For material (hot rolling material) weld metal of built-in web, fracture toughness with higher, it will play suppression
The effect of crack Propagation processed.
Claims (5)
1. a kind of welding method for reducing the site welding stress deformation of heavy wall steel construction, it is characterised in that welding method step is such as
Under:
Step 1: the material for choosing built-in web is identical as the material of heavy wall steel construction base material；The plane geometry shape of built-in web
Shape and its overall size setting identical as the cross section of welding groove；
Step 2: being arranged at intervals with several built-in abdomens inlayed along the length direction of weld seam in banjo fixing butt jointing welding groove
Plate collectively forms " skeleton system structure " by the built-in web that welding groove wall and several of base material are inlayed；
Step 3: for the weld groove of round tube banjo fixing butt jointing: the minimum spacing of the two neighboring built-in web of arrangement is 314mm；
For the weld groove of non-round banjo fixing butt jointing, arrange that the minimum spacing of two neighboring built-in web is 200mm；Heavy wall steel construction
2 times of the thickness of base material≤built-in web plate thickness；
Step 4: built-in web is welded: two-sided bevel is opened in the thickness direction two sides of built-in web, i.e., built-in web and heavy wall steel
There are welded gaps for pipe contact surface, are guaranteed between built-in web and the base material of banjo fixing butt jointing welding groove wall completely using back chipping weldering
Fusion；
Step 5: being inlayed after " the skeleton system structure " of banjo fixing butt jointing is welded molding in welding groove wall and several of base material
The partition space that is surrounded of built-in web be filled welding, carry out cosmetic welding finally along the longitudinal measure direction of weld seam
It connects.
2. the welding method according to claim 1 for reducing the site welding stress deformation of heavy wall steel construction, it is characterised in that:
Welding manner in step 5 is to be symmetrically welded, be layered welding or segmented welding.
3. the welding method according to claim 1 or 2 for reducing the site welding stress deformation of heavy wall steel construction, feature exist
In: the profile for the built-in web inlayed is wedge shaped.
4. the welding method according to claim 3 for reducing the site welding stress deformation of heavy wall steel construction, it is characterised in that:
The plate thickness direction bilateral bevel of built-in web, and use back chipping Welding.
5. the welding method according to claim 1,2 or 4 for reducing the site welding stress deformation of heavy wall steel construction, feature
It is: is uniformly arranged several built-in webs inlayed along fusion length direction at the welding groove of banjo fixing butt jointing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810964191.1A CN108941949B (en) | 2018-08-23 | 2018-08-23 | Welding method for reducing field welding stress deformation of thick-wall steel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810964191.1A CN108941949B (en) | 2018-08-23 | 2018-08-23 | Welding method for reducing field welding stress deformation of thick-wall steel structure |
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| CN108941949A true CN108941949A (en) | 2018-12-07 |
| CN108941949B CN108941949B (en) | 2020-09-29 |
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| CN201810964191.1A Active CN108941949B (en) | 2018-08-23 | 2018-08-23 | Welding method for reducing field welding stress deformation of thick-wall steel structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111843103A (en) * | 2020-08-11 | 2020-10-30 | 中国电建集团山东电力建设有限公司 | Split tee fitting assembly welding method |
| CN115270280A (en) * | 2022-08-31 | 2022-11-01 | 广东省六建集团有限公司 | Non-concentric double-shaft wheel steel structure building method and device and computer equipment |
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| SU706208A1 (en) * | 1976-05-21 | 1979-12-30 | Воронежский Ордена Ленина Завод Тяжелых Механических Прессов | Method of welding structures from thick-sheet rolled stock |
| CN1410222A (en) * | 2001-09-21 | 2003-04-16 | 重庆钢铁(集团)有限责任公司 | Method of repairing defect of metallic member using embedded mending welding |
| JP2003305568A (en) * | 2002-04-12 | 2003-10-28 | Toshiba Plant Kensetsu Co Ltd | Groove butt welding method using insert member and insert member used for the same |
| US20090314757A1 (en) * | 2008-06-18 | 2009-12-24 | Caterpillar Inc. | Thick gage welding |
| CN104668880A (en) * | 2013-11-29 | 2015-06-03 | 陕西天元材料保护科技有限公司 | Bearing steel welding repairing method |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU706208A1 (en) * | 1976-05-21 | 1979-12-30 | Воронежский Ордена Ленина Завод Тяжелых Механических Прессов | Method of welding structures from thick-sheet rolled stock |
| CN1410222A (en) * | 2001-09-21 | 2003-04-16 | 重庆钢铁(集团)有限责任公司 | Method of repairing defect of metallic member using embedded mending welding |
| JP2003305568A (en) * | 2002-04-12 | 2003-10-28 | Toshiba Plant Kensetsu Co Ltd | Groove butt welding method using insert member and insert member used for the same |
| US20090314757A1 (en) * | 2008-06-18 | 2009-12-24 | Caterpillar Inc. | Thick gage welding |
| CN104668880A (en) * | 2013-11-29 | 2015-06-03 | 陕西天元材料保护科技有限公司 | Bearing steel welding repairing method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111843103A (en) * | 2020-08-11 | 2020-10-30 | 中国电建集团山东电力建设有限公司 | Split tee fitting assembly welding method |
| CN111843103B (en) * | 2020-08-11 | 2022-04-15 | 中国电建集团山东电力建设有限公司 | Split tee fitting assembly welding method |
| CN115270280A (en) * | 2022-08-31 | 2022-11-01 | 广东省六建集团有限公司 | Non-concentric double-shaft wheel steel structure building method and device and computer equipment |
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| Publication number | Publication date |
|---|---|
| CN108941949B (en) | 2020-09-29 |
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