CN104259636A - Back-gouging-free welding process for double U shaped grooves of medium-thickness plates - Google Patents
Back-gouging-free welding process for double U shaped grooves of medium-thickness plates Download PDFInfo
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- CN104259636A CN104259636A CN201410427476.3A CN201410427476A CN104259636A CN 104259636 A CN104259636 A CN 104259636A CN 201410427476 A CN201410427476 A CN 201410427476A CN 104259636 A CN104259636 A CN 104259636A
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- welding
- groove
- back side
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Classifications
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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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
-
- 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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
- B23K2101/185—Tailored blanks
Abstract
The invention discloses a back-gouging-free welding process for double U shaped grooves of medium-thickness plates. The process includes the steps: assembly before welding, front-face back welding, front-face submerged arc welding, front-face filling and covering, back-face submerged arc welding and back-face filling and covering. Front-face multi-layer welding of the grooves is performed after back-face multi-layer welding of the grooves is finished, and front faces and back faces of the grooves are adjusted at any time during welding according to groove deformation conditions until welding seams of the front faces and the back faces of the grooves are filled completely. The back-gouging-free welding process has the advantages that back-gouging-free welding of the back faces of the double U shaped grooves with different clearances can be realized, waste of manpower, material resources and financial resources due to back gouging in welding of the medium-thickness plates is avoided, welding quality is stable, and welding seams meet the requirements on I-level welding seams.
Description
Technical field
The present invention relates to manufacture of steel structure field, be specifically related to the double-U-shaped groove of a kind of cut deal unclear welding procedure.
Background technology
In thick slab construction in extensive uses such as the boats and ships deck of boat and housing, harbour machinery case beam, bridge spanning the sea panels, slab docking welding is the important step in steel construction and pressure vessel production manufacture process, the traditional welding method of this type welding seam generally adopts one side Y, the double-U-shaped groove of single V/U or X/, manual metal-arc welding or gas is adopted to protect weldering bottoming, after front is welded, back gouging, and then carry out reverse side welding.Adopt to produce in this way and permitted at substantial manpower, carbon-point, electric energy, weld metal loading is large, and production efficiency is low, consuming time, consumption cost, and welding quality is unstable; Adopt the unclear root bead connection technology of I type groove to be just widely used at welding 20mm steel plate, range of application is restricted.
Summary of the invention
Instant invention overcomes in prior art and adopt the unclear root bead connection technology of I type groove to be just widely used at welding 20mm steel plate, the deficiency that range of application is restricted, there is provided a kind of avoid cut deal to weld back gouging causing human and material resources, a large amount of waste of financial resources and welding quality stable, weld seam meets the double-U-shaped groove of cut deal unclear welding procedure of I level weld seam requirement.
The present invention is by the following technical solutions:
A kind of double-U-shaped groove of cut deal unclear welding procedure, comprising: installation step before welding, and adopted by cut deal machined to form double-U-shaped groove, described root face is of a size of 3-8mm, and groove gap is 1-3mm; Front backing welding step, adopts solid core welding wire gas to protect weldering welding manner and carries out backing welding in groove front, do not burn weld seam in welding process; Front submerged-arc welding step, uses small area analysis to carry out submerged-arc welding in groove front; Front is filled and capping step, uses conventional current submerged-arc welding to carry out several welding in groove front to carry out the filling of groove front and capping; Back side submerged-arc welding step, the groove back side adopts big current submerged-arc welding directly to weld when not carrying out back chipping; The back side is filled and capping step, uses conventional current submerged-arc welding to carry out several welding at the groove back side to carry out the filling of the groove back side and capping; Groove back side multilayer welds the multilayer welding of laggard row groove front, according to groove deformation in welding process, adjusts groove front and the back side at any time, till the weld seam of groove front and back fills up completely.
Cut deal is processed to form double-U-shaped groove in installation step before welding in the technical program, adopt double-U-shaped groove thus reach and can save welding material and weld interval, improve the technique effect of welding production efficiency, adopt unclear welding procedure to overcome in the technical program in back side submerged-arc welding step and adopt manual metal-arc welding or gas to protect weldering bottoming, after front is welded, back gouging, and then at substantial manpower is permitted in the production carrying out reverse side welding existence, carbon-point, electric energy, weld metal loading is large, production efficiency is low, consuming time, consumption cost, the deficiencies such as welding quality is unstable.
Further technical scheme is, in described front submerged-arc welding step, use diameter to be the solid core welding wire of 4.0mm, electric current is 350A-500A, and voltage is 31V-35V, and speed of welding is 350-425mm/min.
Further technical scheme is, fill in described front and solid core welding wire that in capping step, every one weld seam all uses be diameter is 4.0mm, electric current is 500A ~ 850A, and voltage is 31V ~ 38V, and speed of welding is 350 ~ 450mm/min.
Further technical scheme is, in described back side submerged-arc welding step, use diameter to be the solid core welding wire of 4.0mm, electric current is 750A ~ 950A, and voltage is 30V ~ 45V, 350 ~ 500mm/min.
By adopting the Proper Match of welding current, voltage and speed of welding in the technical program, solving the welding method of traditional handicraft complexity, ensure that weld is accepted rate meets I grade of weld seam requirement simultaneously, when decreasing Welder, saved welding material.
Compared with prior art, the invention has the beneficial effects as follows:
1. welding procedure of the present invention is suitable for welding the weld seam of more than 30mm, insensitive to the change of divergence of the quality of groove, fit-up gap, is applicable to produce actual;
2. the present invention can realize the unclear root bead in the double-U-shaped groove back side, gap such as or not connects, and avoid human and material resources that cut deal welding back gouging causes, a large amount of waste of financial resources and welding quality stable, weld seam meets I grade of weld seam requirement;
3. the present invention adopts the Proper Match of welding current, voltage and speed of welding, solves the welding method of traditional handicraft complexity, ensure that weld is accepted rate meets I grade of weld seam requirement simultaneously, when decreasing Welder, has saved welding material.
Detailed description of the invention
A kind of double-U-shaped groove of cut deal unclear welding procedure, comprising: the double-U-shaped groove of a kind of cut deal unclear welding procedure, comprising:
Installation step before welding, adopted by cut deal machined to form double-U-shaped groove, described root face is of a size of 3-8mm, and groove gap is 1-3mm;
Front backing welding step, adopts solid core welding wire gas to protect weldering welding manner and carries out backing welding in groove front, do not burn weld seam in welding process;
Front submerged-arc welding step, uses small area analysis to carry out submerged-arc welding in groove front, and in described front submerged-arc welding step, use diameter to be the solid core welding wire of 4.0mm, electric current is 350A-500A, and voltage is 31V-35V, and speed of welding is 350-425mm/min;
Front is filled and capping step, conventional current submerged-arc welding is used to carry out several welding in groove front to carry out the filling of groove front and capping, fill in described front and solid core welding wire that in capping step, every one weld seam all uses be diameter is 4.0mm, electric current is 500A ~ 850A, voltage is 31V ~ 38V, and speed of welding is 350 ~ 450mm/min;
Back side submerged-arc welding step, the groove back side adopts big current submerged-arc welding directly to weld when not carrying out back chipping, and in described back side submerged-arc welding step, use diameter to be the solid core welding wire of 4.0mm, electric current is 750A ~ 950A, voltage is 30V ~ 45V, 350 ~ 500mm/min;
The back side is filled and capping step, uses conventional current submerged-arc welding to carry out several welding at the groove back side to carry out the filling of the groove back side and capping;
Groove back side multilayer welds the multilayer welding of laggard row groove front, according to groove deformation in welding process, adjusts groove front and the back side at any time, till the weld seam of groove front and back fills up completely.
Spoken of in this manual " embodiment ", " another embodiment ", " embodiment ", etc., refer to the specific features, structure or the feature that describe in conjunction with this embodiment and be included at least one embodiment of the application's generality description.Multiple place occurs that statement of the same race is not necessarily refer to same embodiment in the description.Furthermore, when describing specific features, structure or a feature in conjunction with any embodiment, what advocate is also drop in scope of the present utility model to realize this feature, structure or feature in conjunction with other embodiments.
Although be described invention with reference to multiple explanatory embodiment of the present invention here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of the open claim of the application, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.
Claims (4)
1. the double-U-shaped groove of cut deal unclear welding procedure, comprising:
Installation step before welding, adopted by cut deal machined to form double-U-shaped groove, described root face is of a size of 3-8mm, and groove gap is 1-3mm;
Front backing welding step, adopts solid core welding wire gas to protect weldering welding manner and carries out backing welding in groove front, do not burn weld seam in welding process;
Front submerged-arc welding step, uses small area analysis to carry out submerged-arc welding in groove front;
Front is filled and capping step, uses conventional current submerged-arc welding to carry out several welding in groove front to carry out the filling of groove front and capping;
Back side submerged-arc welding step, the groove back side adopts big current submerged-arc welding directly to weld when not carrying out back chipping;
The back side is filled and capping step, uses conventional current submerged-arc welding to carry out several welding at the groove back side to carry out the filling of the groove back side and capping;
Groove back side multilayer welds the multilayer welding of laggard row groove front, according to groove deformation in welding process, adjusts groove front and the back side at any time, till the weld seam of groove front and back fills up completely.
2. the double-U-shaped groove of cut deal according to claim 1 unclear welding procedure, is characterized in that:
In described front submerged-arc welding step, use diameter to be the solid core welding wire of 4.0mm, electric current is 350A-500A, and voltage is 31V-35V, and speed of welding is 350-425mm/min.
3. the double-U-shaped groove of cut deal according to claim 1 unclear welding procedure, is characterized in that:
Fill in described front and solid core welding wire that in capping step, every one weld seam all uses be diameter is 4.0mm, electric current is 500A ~ 850A, and voltage is 31V ~ 38V, and speed of welding is 350 ~ 450mm/min.
4. the double-U-shaped groove of cut deal according to claim 1 unclear welding procedure, is characterized in that:
In described back side submerged-arc welding step, use diameter to be the solid core welding wire of 4.0mm, electric current is 750A ~ 950A, and voltage is 30V ~ 45V, 350 ~ 500mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410427476.3A CN104259636A (en) | 2014-08-27 | 2014-08-27 | Back-gouging-free welding process for double U shaped grooves of medium-thickness plates |
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|---|---|---|---|
| CN201410427476.3A CN104259636A (en) | 2014-08-27 | 2014-08-27 | Back-gouging-free welding process for double U shaped grooves of medium-thickness plates |
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| CN104259636A true CN104259636A (en) | 2015-01-07 |
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| CN201410427476.3A Pending CN104259636A (en) | 2014-08-27 | 2014-08-27 | Back-gouging-free welding process for double U shaped grooves of medium-thickness plates |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759779A (en) * | 2015-04-08 | 2015-07-08 | 上海电气核电设备有限公司 | Groove butt welding structure and welding method thereof |
| CN104942412A (en) * | 2015-05-08 | 2015-09-30 | 青岛石化检修安装工程有限责任公司 | Technology of middle sheet back submerged-arc welding without back chipping |
| CN107052539A (en) * | 2017-02-16 | 2017-08-18 | 山东奥太电气有限公司 | A kind of cut deal mariages twin arc submerged arc welding technique for exempting from back chipping |
| CN108788507A (en) * | 2018-07-12 | 2018-11-13 | 福建省马尾造船股份有限公司 | A kind of divided edge structure and welding procedure of steel plate welding |
| CN111014958A (en) * | 2019-12-20 | 2020-04-17 | 渤海造船厂集团有限公司 | Thick steel plate double-sided laser-MAG composite large-truncated-edge backing welding method |
| CN114987678A (en) * | 2022-07-08 | 2022-09-02 | 上海外高桥造船有限公司 | Mutually-embedded welding assembly and ship comprising same |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759779A (en) * | 2015-04-08 | 2015-07-08 | 上海电气核电设备有限公司 | Groove butt welding structure and welding method thereof |
| CN104942412A (en) * | 2015-05-08 | 2015-09-30 | 青岛石化检修安装工程有限责任公司 | Technology of middle sheet back submerged-arc welding without back chipping |
| CN107052539A (en) * | 2017-02-16 | 2017-08-18 | 山东奥太电气有限公司 | A kind of cut deal mariages twin arc submerged arc welding technique for exempting from back chipping |
| CN108788507A (en) * | 2018-07-12 | 2018-11-13 | 福建省马尾造船股份有限公司 | A kind of divided edge structure and welding procedure of steel plate welding |
| CN111014958A (en) * | 2019-12-20 | 2020-04-17 | 渤海造船厂集团有限公司 | Thick steel plate double-sided laser-MAG composite large-truncated-edge backing welding method |
| CN114987678A (en) * | 2022-07-08 | 2022-09-02 | 上海外高桥造船有限公司 | Mutually-embedded welding assembly and ship comprising same |
| CN114987678B (en) * | 2022-07-08 | 2023-12-15 | 上海外高桥造船有限公司 | Mutually embedded welding assembly and ship comprising same |
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Application publication date: 20150107 |
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