CN107598330A - U rib complete penetration welding methods - Google Patents
U rib complete penetration welding methods Download PDFInfo
- Publication number
- CN107598330A CN107598330A CN201711021126.7A CN201711021126A CN107598330A CN 107598330 A CN107598330 A CN 107598330A CN 201711021126 A CN201711021126 A CN 201711021126A CN 107598330 A CN107598330 A CN 107598330A
- Authority
- CN
- China
- Prior art keywords
- welding
- ribs
- welded
- panel
- rib
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides a kind of U ribs complete penetration welding method.By in backing welding, panel relative level to be welded is set into a reverse inclination angle, the poly- arc pulse deep penetration welding rifle of special angle is coordinated to be welded, raised undercut phenomenon caused by molten iron surface tension can be overcome by gravity, U ribs and the full penetration of panel angle welding are completed well, and ensure that interior outside shaping is good.Full penetration weld ensures the net sectional area of weld seam, so as to ensure that weld seam and mother metal etc. are strong, avoids the partial penetration root of weld and is also easy to produce stress concentration phenomenon, effectively lift the anti-fatigue performance of welding point.
Description
Technical field
The present invention relates to a kind of welding method, is a kind of U ribs complete penetration welding method specifically.
Background technology
Orthotropic Steel Bridge Deck is by feat of the fast advantage of in light weight, speed of application, at home and abroad big mid-span steel structural bridge
It is applied widely on beam and face, steel bridge panel structure is as shown in Figure 1.Because long and narrow, closing the structure of U ribs itself is special
Property, welded between traditional U ribs and panel using outside one-side-filled angle weld, weld penetration is thick 80% of U rib plate.Bridge
During use, steel bridge deck can be produced fatigue crack in root in U ribs, cause U rib weld seams by vehicle wheel load alternate load
Position is as the district occurred frequently of Steel Bridge potential safety hazard, the quality of weldquality between U ribs and panel, directly influences the entirety of bridge
Quality and service life.
For exist during U rib plate element solder angle welding root can not whole penetrations, weld penetration is only that U rib plate is thick
80%, therefore the problem of weld seam is also easy to produce fatigue crack.Full penetration weld can ensure the net sectional area of weld seam, so that weldering
Seam and mother metal etc. are strong, and the root of weld for avoiding partial penetration is also easy to produce stress concentration phenomenon.
Full penetration is ground from two-sided welding and single face welding and double face shaping both direction in the prior art
Study carefully.For two-sided welding, mainly pass through some special welding equipments, such as YS-1DT6 case pipe welding machines in the prior art
With miniature interior welds dolly, welding job is completed into U ribs inside, outside uses common welding method, with this reality
U rib plate full penetration two-weld process is showed.But the technique of so two-sided welding can all greatly increase welding job amount and labor
Dynamic cost, therefore, the research of U rib plate angle welding single face welding and double face shaping technique is very urgent.
For U rib plate full penetration single-side welding double-side forming technique, disclosed in prior art (CN105436674A)
A kind of full penetration technique, in the case where 47 ° are assembled bevel angle, exist using solid welding wire and by poly- arc pulse deep penetration welding rifle
Prosposition position carries out deep penetration welding bottoming welding, then carries out cover welding in prosposition position or ship type position using flux-cored wire,
Single face welding and double face shaping full penetration is realized, U angle of rib weld seams mechanical characteristic is improved, improves U ribs weldquality, extends bridge
Beam service life.But inventor has found in further research, due to being used in the patent document during deep penetration welding backing welding
Downhand welding, back of weld is in process of setting because molten iron surface tension easily forms raised undercut phenomenon, as shown in Fig. 2 the weld seam
The not rounding off convexed to form easily causes stress concentration, under arms during, due to by alternation lotus caused by vehicle to run
Carry, fatigue crack tendency can be produced seriously, the final service life for reducing bridge.
In view of the above-mentioned problems, in order to improve U angle of ribs weldquality, improve U angle of rib weld seams mechanical characteristic, extension bridge use
Life-span, and propose a kind of U ribs turns into ability with the full penetration that outside shaping is good, weldquality is excellent in panel angle welding
Domain technical problem urgently to be resolved hurrily.
The content of the invention
Based in U rib plate full penetration single-side welding double-side forming technique in the prior art, because back of weld forms projection
Undercut, bead formed on back is poor, causes stress concentration, reduces the technical problem of the service life of bridge, is found in the present invention in bottoming
In weldering, panel relative level to be welded is set into a specific angle, coordinates the poly- arc pulse deep penetration welding of special angle
Rifle carries out bottoming welding, can overcome raised undercut phenomenon caused by molten iron surface tension by gravity, back of weld is molded excellent
Good, transition is round and smooth, effectively lifts the anti-fatigue performance of welding point.On this basis, the invention provides a kind of U ribs and face
The U rib complete penetration welding methods that outside shaping is good in plate angle weld seam, weldquality is excellent, comprise the following steps：
A kind of U ribs complete penetration welding method, it is characterised in that comprise the following steps：
(1) welding groove is processed on U ribs, U ribs is placed on panel to be welded；
(2) using poly- arc pulse deep penetration welding rifle the outside of the side rib pin of U ribs one, with the horizontal 25-40 degree angles to one
The joint of side rib pin and panel to be welded carries out bottoming welding, wherein, bottoming is carried out under conditions of being welded on below：Surface to be welded
One end of plate is lifted, and U ribs form the reverse inclination angle for the position of falling ship shape with panel, i.e., so that relative with the side rib pin of U ribs one is another
The height of panel to be welded at side rib pin higher than panel to be welded at the side rib pin of U ribs one height, and panel to be welded and horizontal plane it
Between formed 3-18 degree angle；
(3) cover welding is carried out to the joint of the side rib pin of U ribs one and panel to be welded.
Further, during cover welding, U ribs and panel to be welded are rotated, carries out fillet welding in the flat position.
Further, cover welding uses flux-cored arc welding.
Further, the outside bevel angle of welding groove is 45-65 degree.
Further, U rib thicknesses are 6-10mm.
Further, the thickness of panel to be welded is 12-20mm.
Further, the groove gap of welding groove is less than 0.5mm.
Further, the root face of welding groove is less than 2mm.
Further, the angle between the side rib pin of U ribs one and panel is 70-80 degree.
In summary, by the U rib complete penetration welding methods disclosed in the present invention, U ribs and panel fillet welding are completed well
The full penetration of seam, and ensure that interior outside shaping is good.Full penetration weld ensures the net sectional area of weld seam, so as to ensure
Weld seam and mother metal etc. are strong, avoid the partial penetration root of weld and are also easy to produce stress concentration phenomenon.Realize U rib plate unit full penetration
The controllability of welding technique, it is equal to improving U angle of ribs weldquality, improvement U angle of rib weld seams mechanical characteristic, extension bridge service life
With important value.In addition, this Orthotropic Steel Bridge Deck U angle of rib weld seam single face welding and double face shaping welding procedures are in technology
Operability and construction cost, efficiency are all substantially better than the process of U rib interior welds bottoming or internal stickers lining pad outside weldings.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description：
Fig. 1 is floor cellular construction schematic diagram；
Fig. 2 is downhand position backing weld seam shaping schematic view in the prior art；
Fig. 3 welds schematic diagram for bottoming in the present invention；
Fig. 4 is backing weld seam shaping schematic view in the present invention；
Fig. 5 is cover welding schematic diagram in the present invention.
Element numbers are as follows：
10-U ribs
The side rib pin of 11- mono-
Another side rib pin of 12-
20- panels
The poly- arc pulse deep penetration welding rifles of 30-
A-U floors and panel angle
Bevel angle on the outside of b-
The angle of c- panels and horizontal plane
The angle of d- welding guns and horizontal plane
The thickness of t-U ribs
The thickness of T- panels
Embodiment
Presently in connection with accompanying drawing, better embodiment of the invention is discussed in detail.Although description of the invention will combine each
Embodiment is introduced together, but this feature for not representing this invention is only limitted to the several embodiments.On the contrary, combine real
It is to be possible to the other selections extended to cover the claim based on the present invention that the mode of applying, which makees the purpose that invention is introduced,
Or transformation.In order to which the depth provided to the present invention understands, many concrete details will be included in describing below.The present invention can also
Implement without using these details.In addition, in order to avoid the emphasis of the chaotic or fuzzy present invention, some details will in the de-scription
It is omitted.
" on ", " under ", "left", "right", " top ", " bottom ", are in order to preferably in addition, used in the following description
Describe the better embodiment of the present invention and set, should not be construed as limiting the invention.
The invention provides the U ribs 10 that outside shaping is good, weldquality is excellent in a kind of U ribs 10 and the angle welding of panel 20
Angle welding complete penetration welding method, comprises the following steps：
(1) polishing prepares before completing weldering, and to-be-welded region and the polishing of both sides 20~30mm scopes are cleaned out, expose gold
Belong to gloss, process welding groove, then U ribs 10 are placed on panel 20 to be welded；
(2) as shown in figure 3, using poly- arc pulse deep penetration welding rifle 30 the outside of the side rib pin 11 of U ribs 10 1, with the horizontal
25-40 degree angle d carry out bottoming welding to the joint of a side rib pin 11 and panel 20 to be welded, wherein, bottoming is welded on following
Under conditions of carry out：One end of panel 20 to be welded is lifted so that another side rib pin 12 relative with the side rib pin 11 of U ribs 10 1
The height of the panel to be welded 20 at place is higher than the height of panel 20 to be welded at the side rib pin 11 of U ribs 10 1, and panel to be welded 20 and level
The angle c of 3-18 degree is formed between face；After backing welding is completed, backing weld seam is molded as shown in figure 4, passing through mutual cooperation
The angle of angle of welding gun and panel to be welded 20, Action of Gravity Field can overcome the weld flush that molten iron surface tension is formed, relative to existing
There is the weld seam using downhand welding as shown in Figure 2 in technology, the back of weld shaping that the present invention obtains is excellent, does not contain projection and stings
Side, transition is round and smooth, and welding point anti-fatigue performance is excellent.
(3) cover welding is carried out to the joint of the side rib pin 11 of U ribs 10 1 and panel 20 to be welded.
Preferably, as shown in figure 5, during cover welding, U ribs 10 and panel to be welded 20 are rotated, carries out fillet welding in the flat position, Ke Yichong
Code insurance card capping shaping is good.
It is highly preferred that cover welding uses flux-cored arc welding.
Further, when to the side rib pin 11 of U ribs 10 1 polish preparation and process welding groove, it is preferable that by U ribs
10 another side rib pin 12 also carries out polish preparation and processing welding groove.After the welding of the side rib pin 11 of U ribs 10 1 is completed,
Another side rib pin 12 of U ribs 10 can be welded with repeat step (2) and step (3).
Further, in order that gravity can overcome the molten iron surface tension of back of weld just, it is necessary to control in the present invention
Make the angle c that 3-18 degree is formed between panel 20 and horizontal plane to be welded.Angle c is too small, and gravity may not overcome iron completely
Water surface tension, angle c is excessive, and molten iron may flow downward along panel 20, influence appearance of weld.Preferably, it is to be welded
Be formed as the angle c of 5-12 degree between panel 20 and horizontal plane.
Further, the form for welding groove does not have special restriction, can be single groove, double-sided symmetrical groove
Or two-sided asymmetric groove.Preferably, the outside bevel angle b of welding groove is 45-65 degree, within the range, can be facilitated
Welding gun reaches bottom, can avoid the loading of welding wire excessive again, ensures that the shaping of U ribs internal weld seams is uniformly attractive in appearance.
Further, existing welding procedure is limited to, the thickness t of U ribs 10 used in the prior art is generally 6-8mm,
And by the angle welding complete penetration welding method of U ribs 10 in the present invention, the thickness t of U ribs 10 can be 6-10mm.
Further, for the thickness T of panel 20 to be welded, when the thickness T of panel 20 is too low, there may be burn-through panel 20
Risk, the present invention in the thickness T of panel 20 to be welded be preferably 12-20mm.
Further, root gap is excessive, can increase wlding usage amount, and deforms larger, influences welding precision, preferably
Ground, the groove gap of welding groove are less than 0.5mm.
Further, the root face of welding groove is smaller, more easily realizes full penetration, it is preferable that welding groove in the present invention
Root face is less than 2mm.
Further, the angle a between the side rib pin 11 of U ribs 10 1 and panel 20 is 70-80 degree.
Embodiment 1
So that the thickness of slab t of U ribs 10 is 8mm, the thickness T of panel 20 is 16mm high-strength steel sheets as an example, the angle welding one side of U ribs 10 is carried out
Weld double-faced forming full penetration.
1st, welding preparation
It is 8mm to complete retaining wall on slope and assembling, the thickness of slab t of U ribs 10 by Fig. 3, and the thickness T of panel 20 is 16mm, and steel plate material is
Q345qE.The side angle of rib 11 of U ribs 10 is 75 ° with the angle a of panel 20, and bevel angle b is 50 ° on the outside of weld seam, during assembling between root
Gap is less than 1mm with root face, and iron rust, greasy dirt in the range of groove and surrounding 20mm are removed before welding.
2nd, welding adjustment
Workpiece (U ribs 10 and panel 20 that assembling is completed) is hoisted on moulding bed, adjustment moulding bed forms 8 ° of reverse inclination angle c
(i.e. so that the height of the panel to be welded 20 at another side rib pin 12 relative with the side rib pin 11 of U ribs one is higher than the side rib pin of U ribs 10 1
The height of panel 20 to be welded at 11, and 8 degree of angle c) is formed between panel to be welded 20 and horizontal plane, and adjust welding gun and make welding gun
Angle d with horizontal plane is 32 °.
3rd, bottoming is welded
Bottoming welding is carried out, is welded using the poly- bottoming of arc pulse deep penetration welding rifle 30, as shown in figure 4, welding parameter is shown in Table 1 institute
Show.
4th, cover welding
Carry out cover welding, using flux-cored wire gas shield welding, rotate moulding bed make workpiece be in ship welding position put guarantee capping into
Type is good, as shown in figure 5, welding parameter is shown in Table 1.
Table 1：Welding condition
The full penetration of the angle welding of U ribs 10 obtained by embodiment 1, back of weld are not present raised undercut, positive and negative into
Type is good, and anti-fatigue performance is excellent.
In summary, by the U rib complete penetration welding methods disclosed in the present invention, U ribs and panel fillet welding are completed well
The full penetration of seam, and ensure that interior outside shaping is good.Full penetration weld ensures the net sectional area of weld seam, so as to ensure
Weld seam and mother metal etc. are strong, avoid the partial penetration root of weld and are also easy to produce stress concentration phenomenon.Realize U rib plate unit full penetration
The controllability of welding technique, it is equal to improving U angle of ribs weldquality, improvement U angle of rib weld seams mechanical characteristic, extension bridge service life
With important value.In addition, this Orthotropic Steel Bridge Deck U angle of rib weld seam single face welding and double face shaping welding procedures are in technology
Operability and construction cost, efficiency are all substantially better than the process of U rib interior welds bottoming or internal stickers lining pad outside weldings.
Above-mentioned explanation is the embodiment of embodiment in the present invention, for being illustrated more clearly that the invention of the present invention
Design, but it is for the restriction to scope of the presently claimed invention that it, which is not,.According to the inventive concept of the present invention, this area skill
Art personnel can easily variants and modifications the above embodiments, these variants and modifications belonged in the inventive concept of the present invention
It is all contained within the scope of appended claims of the present invention.
Claims (9)
1. a kind of U ribs complete penetration welding method, it is characterised in that comprise the following steps：
(1) welding groove is processed on U ribs, the U ribs is placed on panel to be welded；
(2) using poly- arc pulse deep penetration welding rifle the outside of the side rib pin of U ribs one, with the horizontal 25-40 degree angle to institute
The joint for stating a side rib pin and the panel to be welded carries out bottoming welding, wherein, under conditions of the bottoming is welded on below
Carry out：One end of the panel to be welded is lifted so that described at another side rib pin relative with the side rib pin of U ribs one
The height of panel to be welded is higher than the height of the panel to be welded at the side rib pin of U ribs one, and the panel to be welded and horizontal plane
Between formed 3-18 degree angle；
(3) cover welding is carried out to the joint of the side rib pin of U ribs one and the panel to be welded.
2. U ribs complete penetration welding method according to claim 1, it is characterised in that during the cover welding, described in rotation
U ribs and the panel to be welded, carry out fillet welding in the flat position.
3. U ribs complete penetration welding method according to claim 1, it is characterised in that the cover welding is welded using medicine core
Silk gas shielded arc welding.
4. the U rib complete penetration welding methods according to any one of claim 1-3, it is characterised in that the welding groove
Outside bevel angle be 45-65 degree.
5. the U rib complete penetration welding methods according to any one of claim 1-3, it is characterised in that the U rib thicknesses are
6-10mm。
6. the U rib complete penetration welding methods according to any one of claim 1-3, it is characterised in that the panel to be welded
Thickness be 12-20mm.
7. the U rib complete penetration welding methods according to any one of claim 1-3, it is characterised in that the welding groove
Groove gap be less than 0.5mm.
8. the U rib complete penetration welding methods according to any one of claim 1-3, it is characterised in that the welding groove
Root face be less than 2mm.
9. the U rib complete penetration welding methods according to any one of claim 1-3, it is characterised in that the side rib of U ribs one
Angle between pin and the panel to be welded is 70-80 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021126.7A CN107598330B (en) | 2017-10-26 | 2017-10-26 | Full penetration welding method for U-shaped rib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021126.7A CN107598330B (en) | 2017-10-26 | 2017-10-26 | Full penetration welding method for U-shaped rib |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107598330A true CN107598330A (en) | 2018-01-19 |
| CN107598330B CN107598330B (en) | 2020-05-01 |
Family
ID=61080191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711021126.7A Active CN107598330B (en) | 2017-10-26 | 2017-10-26 | Full penetration welding method for U-shaped rib |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107598330B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570708A (en) * | 2018-11-15 | 2019-04-05 | 中铁宝桥（扬州）有限公司 | A kind of orthotropic steel bridge deck U rib K-type connector complex welding method |
| CN109570707A (en) * | 2018-11-15 | 2019-04-05 | 中铁宝桥（扬州）有限公司 | A kind of Steel Bridge U rib plate block complete penetration welding method |
| CN110181189A (en) * | 2019-06-27 | 2019-08-30 | 广船国际有限公司 | A kind of welding method of CM node groove |
| CN111519526A (en) * | 2020-04-30 | 2020-08-11 | 云南昆钢钢结构股份有限公司 | Bridge deck stiffening structure and welding method |
| CN114289839A (en) * | 2021-12-17 | 2022-04-08 | 中铁宝桥（扬州）有限公司 | Welding wire alignment method for U-rib gas shielded welding |
| CN115007972A (en) * | 2022-06-13 | 2022-09-06 | 河南中桥重工科技有限公司 | Process for on-site automatic welding of corrugated steel web |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08281476A (en) * | 1995-04-10 | 1996-10-29 | Nippon Steel Weld Prod & Eng Co Ltd | Flux cored wire for gas shield arc welding |
| CN101722350A (en) * | 2010-01-18 | 2010-06-09 | 武船重型工程有限公司 | Steel bridge U-shaped rib welding process |
| CN104759815A (en) * | 2015-04-13 | 2015-07-08 | 上海振华重工(集团)股份有限公司 | Ship-type tire welding positioner and welding method for U-rib plate unit of steel bridge |
| CN105436674A (en) * | 2016-01-13 | 2016-03-30 | 上海振华重工(集团)股份有限公司 | Full penetration welding process |
| CN105458465A (en) * | 2014-09-26 | 2016-04-06 | 株式会社神户制钢所 | Gas-shielded arc welding method |
-
2017
- 2017-10-26 CN CN201711021126.7A patent/CN107598330B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08281476A (en) * | 1995-04-10 | 1996-10-29 | Nippon Steel Weld Prod & Eng Co Ltd | Flux cored wire for gas shield arc welding |
| CN101722350A (en) * | 2010-01-18 | 2010-06-09 | 武船重型工程有限公司 | Steel bridge U-shaped rib welding process |
| CN105458465A (en) * | 2014-09-26 | 2016-04-06 | 株式会社神户制钢所 | Gas-shielded arc welding method |
| CN104759815A (en) * | 2015-04-13 | 2015-07-08 | 上海振华重工(集团)股份有限公司 | Ship-type tire welding positioner and welding method for U-rib plate unit of steel bridge |
| CN105436674A (en) * | 2016-01-13 | 2016-03-30 | 上海振华重工(集团)股份有限公司 | Full penetration welding process |
Non-Patent Citations (1)
| Title |
|---|
| 高元德: "《焊工常识》", 31 October 2007, 深圳：海天出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570708A (en) * | 2018-11-15 | 2019-04-05 | 中铁宝桥（扬州）有限公司 | A kind of orthotropic steel bridge deck U rib K-type connector complex welding method |
| CN109570707A (en) * | 2018-11-15 | 2019-04-05 | 中铁宝桥（扬州）有限公司 | A kind of Steel Bridge U rib plate block complete penetration welding method |
| CN110181189A (en) * | 2019-06-27 | 2019-08-30 | 广船国际有限公司 | A kind of welding method of CM node groove |
| CN110181189B (en) * | 2019-06-27 | 2021-04-02 | 广船国际有限公司 | Welding method of CM node groove |
| CN111519526A (en) * | 2020-04-30 | 2020-08-11 | 云南昆钢钢结构股份有限公司 | Bridge deck stiffening structure and welding method |
| CN114289839A (en) * | 2021-12-17 | 2022-04-08 | 中铁宝桥（扬州）有限公司 | Welding wire alignment method for U-rib gas shielded welding |
| CN115007972A (en) * | 2022-06-13 | 2022-09-06 | 河南中桥重工科技有限公司 | Process for on-site automatic welding of corrugated steel web |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107598330B (en) | 2020-05-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107598330A (en) | U rib complete penetration welding methods | |
| CN104384677B (en) | A kind of super-thick steel plate welding method | |
| CN108705200B (en) | Welding method of stainless steel lining composite board | |
| CN107442907B (en) | A kind of Steel Bridge U rib plate two-sided welding method based on deep molten gas shield welding | |
| CN106112263B (en) | Titanium steel composite board laser silk filling butt welding method using T2 red coppers as transition zone | |
| CN103567613B (en) | A kind of stainless steel clad plate tank car welding procedure | |
| CN106862730A (en) | A kind of vertical butt welding method of slab | |
| CN101982282A (en) | Welding technology for butt welding of composite boards | |
| CN111843132B (en) | Submerged arc welding process for 304L stainless steel thick plate | |
| CN105014187A (en) | Single-side welding and double-side forming method for ceramic gasket of rubber lined tank | |
| CN104259633A (en) | Efficient single-side submerged arc welding method | |
| CN105108278A (en) | Novel method for improving double-side welding efficiency | |
| CN110666290A (en) | Full penetration welding method for U-shaped rib angle welding seam | |
| CN104002029B (en) | A kind of improved flat board butt joint submerged-arc welding | |
| CN103692061A (en) | Butt-welding method using dual-gun automatic horizontal welding bogie | |
| CN111283308A (en) | All-position shielded metal arc welding process for ultralow-temperature 304LN austenitic stainless steel medium plate | |
| JP5239900B2 (en) | Multi-electrode submerged arc welding method for steel | |
| CN208934146U (en) | A kind of deformation joint structure | |
| WO2024001438A1 (en) | Welding method suitable for groove weld of hydraulic support shield beam bent cover plate | |
| JP5829518B2 (en) | Metallurgical slag pot having a new structure and manufacturing method thereof | |
| CN111570979A (en) | Connecting method of dissimilar metal welding test plates | |
| CN110732748A (en) | rectangular column welding method | |
| CN112536540B (en) | Welding process for tension tendon of tension leg platform | |
| CN211939018U (en) | Steel ladle continuous casting rotating arm | |
| CN109759802B (en) | Method for processing supporting boss of pressure container shell section |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |