CN103495797B - Slab Y type groove unclear of the gap welding method such as not - Google Patents
Slab Y type groove unclear of the gap welding method such as not Download PDFInfo
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- CN103495797B CN103495797B CN201310472990.4A CN201310472990A CN103495797B CN 103495797 B CN103495797 B CN 103495797B CN 201310472990 A CN201310472990 A CN 201310472990A CN 103495797 B CN103495797 B CN 103495797B
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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
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/002—Machines, apparatus, or equipment for cutting plane workpieces, e.g. plates
-
- 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
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- 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
- B23K9/235—Preliminary treatment
-
- 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
Present invention is disclosed a kind of slab Y type groove unclear of gap welding method such as not, comprising: cutting and installation step before weldering, cutting steel plate forms groove, not wait gap assembling formation Y type groove; Front bottoming welding step, uses gas shielded arc welding, adopts solid welding wire to swing welding; Front small area analysis submerged-arc welding step, small area analysis makes submerged-arc welding do not burnt by backing welding; Front is filled and cosmetic welding step, uses conventional current submerged-arc welding to carry out several welding in front to carry out front filling and capping; Back side big current submerged-arc welding step, directly adopt big current to carry out submerged-arc welding overleaf when not carrying out carbon plane back chipping, big current makes the fusion penetration of back side submerged-arc welding be greater than the size of the root face of Y type groove.
Description
Technical field
The present invention relates to manufacture of steel structure technology, more particularly, relate to thick plates technology.
Background technology
Slab docking welding is the important step of steel construction product manufacturing, traditional thick plates method generally adopts out V-type (or X-type) groove, front is welded, back side carbon plane back chipping, then welds, its production efficiency is low, consume energy high, environmental pollution is serious, and weld metal loading is large, welding cost is high, is therefore badly in need of the unclear root bead of the efficient slab of development and connects new method.
Traditional V-type (or X-type) groove not back chipping submerged arc welding technique is front submerged arc welding, and stand up the rear back side not carbon plane, directly adopt submerged-arc welding, the method requires very high to retaining wall on slope quality and test plate (panel) assembling precision.In production scene, slab adopts gas flame cuttiug groove usually, and groove is of poor quality, and linearity is not high, and steel plate group is uneven to post gap, and according to traditional not back chipping submerged arc welding technology, weld seam easily produces pore, is mingled with and the number of drawbacks such as incomplete fusion.
The current I type groove unclear root bead connection technology in gap such as is not find broad application in the steel plate of below 16mm at thickness of slab, but when thickness of slab size increases further, simple by improving the good fusion that submerged-arc welding electric current can not realize between positive and negative weld metal.
So, just need one to be suitable for slab (more than 16mm thickness), and the solder technology of the production scene groove assembling situation in gap such as not can be adapted to.
Summary of the invention
The present invention be intended to propose one can adapt to not wait gap assembling, do not need carbon plane back chipping thick plates technology.
According to one embodiment of the invention, propose a kind of slab Y type groove unclear of gap welding method such as not, comprising:
Cutting and installation step before weldering, cutting steel plate forms groove, not wait gap assembling formation Y type groove;
Front bottoming welding step, uses gas shielded arc welding, adopts solid welding wire to swing welding;
Front small area analysis submerged-arc welding step, small area analysis makes submerged-arc welding do not burnt by backing welding;
Front is filled and cosmetic welding step, uses conventional current submerged-arc welding to carry out several welding in front to carry out front filling and capping;
Back side big current submerged-arc welding step, directly adopt big current to carry out submerged-arc welding overleaf when not carrying out carbon plane back chipping, described big current makes the fusion penetration of back side submerged-arc welding be greater than the size of the root face of Y type groove.
In one embodiment, before weldering in cutting and installation step, adopt gas flame cuttiug to form groove, the root face size 6 ~ 10mm of groove, root does not wait gap assembling formation Y type groove with 1 ~ 3mm.
In one embodiment, before weldering, cutting and installation step also comprise spot welding position fixing process, and described spot welding location adopts gas shielded arc welding, uses the solid welding wire of Ф 1.2mm.
In one embodiment, in front bottoming welding step, use Ф 1.2mm solid welding wire, electric current is 160A ~ 200A, and voltage is 23V ~ 25V, and speed of welding is 200 ~ 300mm/min.
In one embodiment, in front small area analysis submerged-arc welding step, use Ф 4mm solid welding wire, electric current is 450A ~ 500A, and voltage is 29V ~ 31V, and speed of welding is 425 ~ 575mm/min.
In one embodiment, in front filling and cosmetic welding step, every welding together all uses Ф 4mm solid welding wire, and electric current is 500A ~ 650A, and voltage is 29V ~ 32V, and speed of welding is 425 ~ 575mm/min.
In one embodiment, overleaf in big current submerged-arc welding step, use Ф 4mm solid welding wire, electric current is 750A, and voltage is 32V ~ 35V, and speed of welding is 425 ~ 575mm/min.
Slab Y type groove of the present invention unclear of the gap welding method such as is not suitable for the thick plates that thickness of slab is greater than 16mm, insensitive to the Differential variable change of the quality of gas flame cuttiug groove, fit-up gap, is applicable to produce actual.The present invention can realize the unclear root bead in the assembling Y type groove back side, gap such as or not connect, and avoids carbon and digs the waste of material and environmental pollution that cause, and welding quality stable, weld seam meets first-order weld requirement.Simultaneously due to the root face size large (6 ~ 10mm) of Y type groove, face bonding number of channels reduces, thus decreases weld metal loading, has saved wlding, has significantly improved production efficiency.
Accompanying drawing explanation
The above and other feature of the present invention, character and advantage are by more obvious by what become below in conjunction with the description of drawings and Examples, and Reference numeral identical in the accompanying drawings represents identical feature all the time, wherein:
Fig. 1 discloses the schematic diagram according to cutting before carrying out in the slab Y type groove of one embodiment of the invention unclear of the gap welding method such as not welding and assembling.
Fig. 2 discloses the schematic diagram according to carrying out front bottoming welding in the slab Y type groove of one embodiment of the invention unclear of the gap welding method such as not.
Fig. 3 discloses the schematic diagram according to carrying out front small area analysis submerged-arc welding in the slab Y type groove of one embodiment of the invention unclear of the gap welding method such as not.
Fig. 4 discloses the schematic diagram according to carrying out front filling and cosmetic welding in the slab Y type groove of one embodiment of the invention unclear of the gap welding method such as not.
Fig. 5 discloses the schematic diagram according to carrying out back side big current submerged-arc welding in the slab Y type groove of one embodiment of the invention unclear of the gap welding method such as not.
Detailed description of the invention
Present invention is disclosed a kind of slab Y type groove unclear of gap welding method such as not, comprise following step:
Cutting and installation step before weldering, cutting steel plate forms groove, not wait gap assembling formation Y type groove.In one embodiment, this step adopts gas flame cuttiug to form groove, the root face size 6 ~ 10mm of groove, and root does not wait gap assembling formation Y type groove with 1 ~ 3mm.In one embodiment, before this weldering, cutting and installation step also comprise spot welding position fixing process, and spot welding location adopts gas shielded arc welding, uses the solid welding wire of Ф 1.2mm.The schematic diagram that Fig. 1 cuts and assembles before disclosing weldering, δ represents the gap of basis in FIG, and T represents thickness of slab, and method of the present invention is suitable for the slab of thickness of slab at more than 16mm, and in the embodiment shown in Fig. 1, thickness of slab T is the root face size that 20mm, S represent groove.
Front bottoming welding step, uses gas shielded arc welding, adopts solid welding wire to swing welding.In one embodiment, in front bottoming welding step, use Ф 1.2mm solid welding wire, electric current is 160A ~ 200A, and voltage is 23V ~ 25V, and speed of welding is 200 ~ 300mm/min.Front backing welding, also referred to as the weldering of front first, adopts small area analysis, weave bead welding, and guarantee can not burn-through, to avoid the groove type destroying sealing run.Adopt solid welding wire gas protect weldering bottoming solve on the one hand gas flame cuttiug groove accuracy low, assemble uneven problem, solid welding wire backing weld seam is without the need to clearing up coating and welding slag on the other hand.Avoid front submerged-arc welding by backing welding to occur burning or the defect such as slag inclusion, pore appears in root.Fig. 2 discloses the schematic diagram carrying out front bottoming welding.GMAW in Fig. 2 represents front backing welding.
Front small area analysis submerged-arc welding step, small area analysis makes submerged-arc welding do not burnt by backing welding.In one embodiment, in front small area analysis submerged-arc welding step, use Ф 4mm solid welding wire, electric current is 450A ~ 500A, and voltage is 29V ~ 31V, and speed of welding is 425 ~ 575mm/min.Front small area analysis submerged-arc welding is also referred to as front second weld seam, adopt small area analysis submerged-arc welding, electric current is selected should ensure not burnt by backing weld seam, if backing weld seam is burnt by front submerged-arc welding, drop down under causing weld seam liquid metal, being mingled with easily appear in root, the defect such as pore, incomplete fusion.Fig. 3 discloses the schematic diagram of front small area analysis submerged-arc welding.SAW2 in Fig. 3 represents front small area analysis submerged-arc welding.
Front is filled and cosmetic welding step, uses conventional current submerged-arc welding to carry out several welding in front to carry out front filling and capping.In one embodiment, front is filled and in cosmetic welding step, every welding together all uses Ф 4mm solid welding wire, and electric current is 500A ~ 650A, and voltage is 29V ~ 32V, and speed of welding is 425 ~ 575mm/min.Front is filled and cosmetic welding step comprises several welding step, also referred to as road, front 3rd ~ the n-th weld seam, all adopts conventional current submerged-arc welding, until complete weld cap.Fig. 4 discloses the schematic diagram of front filling and cosmetic welding.SAW3-n in Fig. 4 represents that front is filled and cosmetic welding.
Back side big current submerged-arc welding step, directly adopt big current to carry out submerged-arc welding overleaf when not carrying out carbon plane back chipping, big current makes the fusion penetration of back side submerged-arc welding be greater than the size of the root face of Y type groove.In one embodiment, in back side big current submerged-arc welding step, use Ф 4mm solid welding wire, electric current is 750A, and voltage is 32V ~ 35V, and speed of welding is 425 ~ 575mm/min.The back side adopts big current submerged-arc welding to make root complete penetration, effectively prevent root and produces pore, the defect such as to be mingled with, thus realizes the back side and do not need carbon arc air gouging back chipping.Simultaneously because fillet in normal shear thickness is large, the back side adopts big current welding also can not cause steel plate burn-through.Fig. 5 discloses the schematic diagram of back side big current submerged-arc welding.SAWB in Fig. 5 represents back side big current submerged-arc welding.
The slab Y type groove of the present invention gap unclear welding method advantage compared with prior art such as or not as follows:
Be applicable to the thick plates that thickness of slab is greater than 16mm, insensitive to the quality of gas flame cuttiug groove, large, the wrong variable change in fit-up gap, be applicable to produce actual.The present invention can realize the unclear root bead in the assembling Y type groove back side, gap such as or not connect, and avoids carbon and digs the waste of material and environmental pollution that cause, and welding quality stable, weld seam meets first-order weld requirement.Simultaneously due to the root face size large (6 ~ 10mm) of Y type groove, face bonding number of channels reduces, thus decreases weld metal loading, has saved wlding, has significantly improved production efficiency.
For the submerged arc welding of 20mm thickness of slab: adopt conventional submerged-arc welding, reserved 6mm root face, submerged-arc welding after front submerged-arc welding, reverse side carbon plane back chipping, submerged-arc welding number of channels is 7 ~ 8 roads.Adopt the unclear root bead of 8mm root face Y type groove to connect, submerged-arc welding number of channels is 4 roads, and weld metal loading obviously reduces.
Above-described embodiment is available to be familiar with person in the art to realize or to use of the present invention; those skilled in the art can be without departing from the present invention in the case of the inventive idea; various modifications or change are made to above-described embodiment; thus protection scope of the present invention not limit by above-described embodiment, and should be the maximum magnitude meeting the inventive features that claims are mentioned.
Claims (7)
1. slab Y type groove unclear of the gap welding method such as not, is characterized in that, be applicable to the slab that thickness of slab is greater than 16mm, comprising:
Cutting and installation step before weldering, cutting steel plate forms groove, not wait gap assembling formation Y type groove;
Front bottoming welding step, uses gas shielded arc welding, adopts solid welding wire to swing welding;
Front small area analysis submerged-arc welding step, described small area analysis makes submerged-arc welding do not burnt by backing welding;
Front is filled and cosmetic welding step, uses conventional current submerged-arc welding to carry out several welding in front to carry out front filling and capping;
Back side big current submerged-arc welding step, directly adopt big current to carry out submerged-arc welding overleaf when not carrying out carbon plane back chipping, described big current makes the fusion penetration of back side submerged-arc welding be greater than the size of the root face of Y type groove.
2. slab Y type groove as claimed in claim 1 unclear of the gap welding method such as not, it is characterized in that, cut before described weldering and in installation step, adopt gas flame cuttiug to form groove, the root face size 6 ~ 10mm of groove, root with 1 ~ 3mm not etc. gap assembling form Y type groove.
3. slab Y type groove as claimed in claim 2 does not wait unclear of gap welding method, it is characterized in that, before described weldering, cutting and installation step also comprise spot welding position fixing process, and described spot welding location adopts gas shielded arc welding, the solid welding wire of use Ф 1.2mm.
4. slab Y type groove as claimed in claim 1 unclear of the gap welding method such as not, is characterized in that, in front bottoming welding step, use Ф 1.2mm solid welding wire, electric current is 160A ~ 200A, and voltage is 23V ~ 25V, and speed of welding is 200 ~ 300mm/min.
5. slab Y type groove as claimed in claim 1 unclear of the gap welding method such as not, is characterized in that, in front small area analysis submerged-arc welding step, use Ф 4mm solid welding wire, electric current is 450A ~ 500A, and voltage is 29V ~ 31V, and speed of welding is 425 ~ 575mm/min.
6. slab Y type groove as claimed in claim 1 does not wait unclear of gap welding method, it is characterized in that, in front filling and cosmetic welding step, every welding together all uses Ф 4mm solid welding wire, electric current is 500A ~ 650A, and voltage is 29V ~ 32V, and speed of welding is 425 ~ 575mm/min.
7. slab Y type groove as claimed in claim 1 does not wait unclear of gap welding method, it is characterized in that, in back side big current submerged-arc welding step, use Ф 4mm solid welding wire, electric current is 750A, and voltage is 32V ~ 35V, and speed of welding is 425 ~ 575mm/min.
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| CN201310472990.4A CN103495797B (en) | 2013-10-11 | 2013-10-11 | Slab Y type groove unclear of the gap welding method such as not |
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| CN103495797B true CN103495797B (en) | 2015-12-02 |
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| CN104191097A (en) * | 2014-08-27 | 2014-12-10 | 成都天保重型装备股份有限公司 | Back-chipping-free welding process for X-type grooves of plates of moderate thickness |
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| CN104493342B (en) * | 2014-10-29 | 2016-08-24 | 瑞冬集团有限公司 | A kind of unclear welding procedure of cut deal X-type groove |
| CN104942412B (en) * | 2015-05-08 | 2017-10-17 | 青岛石化检修安装工程有限责任公司 | Thin plate back not back chipping technique in a kind of submerged-arc welding |
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| 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 |
| CN113351965B (en) * | 2021-06-18 | 2022-09-13 | 浙江诚信医化设备有限公司 | Welding process of stainless steel medium plate |
| CN113579432A (en) * | 2021-08-30 | 2021-11-02 | 广船国际有限公司 | Medium plate double-sided single-pass non-back-gouging submerged arc welding method |
| CN114289836A (en) * | 2021-12-17 | 2022-04-08 | 沪东中华造船(集团)有限公司 | Swing submerged arc welding method suitable for EH47 crack arrest steel |
| CN116551131B (en) * | 2023-07-10 | 2023-11-24 | 南通中集能源装备有限公司 | Back chipping-free welding method |
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