CN103785932B - Cut deal I unclear welding procedure of type groove wide arc gap - Google Patents
Cut deal I unclear welding procedure of type groove wide arc gap Download PDFInfo
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- CN103785932B CN103785932B CN201210431664.4A CN201210431664A CN103785932B CN 103785932 B CN103785932 B CN 103785932B CN 201210431664 A CN201210431664 A CN 201210431664A CN 103785932 B CN103785932 B CN 103785932B
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- welding
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- cut deal
- type groove
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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
- B23K10/00—Welding or cutting by means of a plasma
-
- 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
-
- 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
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Abstract
Present invention is disclosed a kind of cut deal I unclear welding procedure of type groove wide arc gap, comprise the following steps that cutting and the front installation step of weldering, adopt plasma cutting cut deal, cut deal assembling is formed I type groove, groove root gap is less than or equal to 3mm, and groove frontal clearance is less than or equal to 5mm.Front backing welding, swings welding manner with small area analysis and carries out backing welding in groove front, and front backing welding forms weld seam but not burn-through in wide arc gap.Front cosmetic welding, carries out submerged-arc welding with small area analysis in groove front, does not burn the weld seam of backing welding in the cosmetic welding process of front.Back side submerged-arc welding, without carbon dig back chipping directly carry out submerged-arc welding at the groove back side, the electric current of back side submerged-arc welding make submerged-arc welding fusion penetration h3 in the back side be cut deal thickness T 3/4.
Description
Technical field
The present invention relates to manufacture of steel structure field, more particularly, it relates to cut deal welding technology field.
Background technology
Cut deal structure is in extensive uses such as the boats and ships deck of boat and housing, harbour machinery box beam, bridge spanning the sea panels.Medium plate docking welding is to account for important ingredient in structure steel fabrication, directly affects product quality and production efficiency.Traditional method is generally adopted out double V-groove, and front is welded, back gouging, then welds, its welding production inefficiency, power consumption height, environmental pollution is serious, cost is high, is badly in need of a kind of high-efficiency low-carbon not back chipping I type groove welding new method, it may be assumed that do not open the welding method of double V-groove, not back chipping.
At present, I type groove is the two-sided single track submerged-arc welding of the many employings of back chipping automatic submerged-arc welding method not, but requires strict to groove and fit-up gap, and the premise of its application is groove is straight flange, fit-up gap≤1mm, and wrong variable≤1mm could realize.But in medium plate cuts, owing to plasma cutting is 3 times of flame cutting efficiency, and it is widely adopted, but plasma cutting causes that bevel cut is of poor quality, facet perpendicularity is not high, when causing sheet material welding, form certain bevel angle 5～10 °, gap 3～5mm.According to current I type groove not back chipping submerged-arc welding (SAW), its welding quality is unstable, be easily generated be mingled with, the defect such as pore and incomplete fusion, cause substantial amounts of reprocessing.Therefore, medium plate need to adopt flame cutting or machining, and within fit-up gap control 1mm, could realize I type groove welding.But owing to adopting flame cutting inefficiency, machining increases operation, and assembled clearance requirement is strict, causes the I unclear root bead of type groove to connect whole efficiency low.Therefore, in the not high situation of cut quality and pre-splicing accuracy, it is achieved the unclear root bead of I type groove connects and becomes a difficult problem.
In addition, be not as high at boats and ships cut deal I type groove not back chipping submerged arc welding prescription, generally require that the UT ultrasonic examination of 5% is spot-check, and heavy-duty machinery cut deal I type groove weld is required strict, require the UT flaw detection of 100% and the RT film making of 20%.Therefore, unclear welding method of I type groove that ship enterprise adopts: the I type groove welding that two-sided single track submerged-arc welding method is not high for cut quality, fit-up gap is big, welding quality is defective, it is impossible to meet the prescription that weight equipment enterprise connects for the I unclear root bead of type groove.
Summary of the invention
It is contemplated that propose a kind of cut deal I unclear welding procedure of type groove wide arc gap that can be applied to plasma cutting process.
According to one embodiment of the invention, it is proposed to a kind of cut deal I unclear welding procedure of type groove wide arc gap, comprise the following steps that
Installation step before cutting and weldering, adopts plasma cutting cut deal, and cut deal assembling is formed I type groove, and groove root gap is less than or equal to 3mm, and groove frontal clearance is less than or equal to 5mm.
Front backing welding, swings welding manner with small area analysis and carries out backing welding in groove front, and front backing welding forms weld seam but not burn-through in wide arc gap.
Front cosmetic welding, carries out submerged-arc welding with small area analysis in groove front, does not burn the weld seam of backing welding in the cosmetic welding process of front.
Back side submerged-arc welding, without carbon dig back chipping directly carry out submerged-arc welding at the groove back side, the electric current of back side submerged-arc welding make submerged-arc welding fusion penetration h3 in the back side be cut deal thickness T 3/4.
In one embodiment, cutting and the front installation step of weldering include adopting gas metal-arc welding GMAW to carry out spot welding reinforcing, and welding adopts solid welding wire.
In one embodiment, front backing welding adopts gas metal-arc welding GMAW, and protective gas is CO2, use solid welding wire welding.Such as, the solid welding wire welding that front backing welding adopts diameter to be 1.2mm, front backing welding fusion penetration h1 is the 1/3～2/3 of cut deal thickness T.
In one embodiment, front cosmetic welding adopts the solid welding wire of diameter 4.0mm to carry out submerged-arc welding, and front cosmetic welding fusion penetration h2 is less than front backing welding fusion penetration h1.It is also preferred that the left front cosmetic welding adopts small area analysis exchange submerged-arc welding.
In one embodiment, back side submerged-arc welding adopts the solid welding wire of diameter 4.0mm to carry out submerged-arc welding, fusion penetration through welding root, and submerged-arc welding fusion penetration h3 in the back side meets T-h1 < h3≤T, and wherein T is the thickness of slab of cut deal, and h1 is front backing welding fusion penetration.It is also preferred that the left back side submerged-arc welding adopts heavy DC submerged-arc welding.
In one embodiment, the thickness of slab of cut deal is 7～14mm.
The suitability in I type groove welding of the cut deal I unclear welding procedure of type groove wide arc gap of the present invention is higher, and article on plasma cut quality is not high, fit-up gap is big, wrong variable change is insensitive, it may be achieved the plane back chipping welding of the wide arc gap I type groove back side not carbon.Welding quality stable, weld seam meets first-order weld requirement, and 100%UT detects a flaw, and 100%RT film making is qualified.Cut deal does not need flame cutting or machining groove, and fit-up gap requires not tight, and welding production efficiency is high.
Accompanying drawing explanation
The above and other feature of the present invention, character and advantage will be become apparent by the description below in conjunction with drawings and Examples, and accompanying drawing labelling identical in the accompanying drawings represents identical feature all the time, wherein:
Fig. 1 discloses the flow chart of the cut deal I type unclear welding procedure of groove wide arc gap according to one embodiment of the invention.
Fig. 2 discloses the structure chart of the wide arc gap I type groove assembling formation in the method for the present invention.
Fig. 3 discloses the schematic diagram of front backing welding in the method for the present invention.
Fig. 4 discloses the schematic diagram of front cosmetic welding in the method for the present invention.
Fig. 5 discloses the schematic diagram of back side submerged-arc welding in the method for the present invention.
Detailed description of the invention
Of low quality at plasma cutting for cut deal in prior art, have that nature groove, fit-up gap be big, weldquality requirement is the situation of first-order weld; the present invention proposes a kind of welding method suitable in cut deal I type groove wide arc gap not back chipping; basic process is S-M-S(SAW-MAG-SAW); namely solid welding wire gas shielded arc welding bottoming (MAG) is adopted; front submerged-arc welding (SAW), back side submerged-arc welding (SAW).
With reference to, shown in Fig. 1, present invention is disclosed a kind of cut deal I unclear welding procedure 100 of type groove wide arc gap, comprising the following steps that
102. installation step before cutting and weldering.Adopting plasma cutting cut deal, cut deal assembling is formed I type groove, groove root gap delta is less than or equal to 3mm, and groove frontal clearance is less than or equal to 5mm.Upwards, fit-up gap is as the criterion natural groove (hypotenuse) with root gap.In one embodiment, cutting and the front installation step 102 of weldering also include welding front surface rust and the oxide skin removed, and adopt gas metal-arc welding GMAW to carry out spot welding reinforcing, and welding adopts solid welding wire.The method of Fig. 2 present invention is assembled the structure chart of the wide arc gap I type groove of formation.
104. front backing welding.Swinging welding manner with small area analysis and carry out backing welding in groove front, front backing welding forms weld seam but not burn-through in wide arc gap.In one embodiment, front backing welding adopts gas metal-arc welding GMAW, and protective gas is CO2, use solid welding wire welding.Such as, the solid welding wire welding that front backing welding adopts diameter to be 1.2mm, front backing welding fusion penetration h1 is the 1/3～2/3 of cut deal thickness T.Front backing welding adopts solid welding wire CO2Gas metal-arc welding GMAW carries out backing welding, adopts small area analysis, weave bead welding, it is ensured that wide arc gap appearance of weld, but can not burn-through.Adopt solid welding wire gas shield welding bottoming to solve plasma cutting and there is the problem that nature groove, fit-up gap are excessive, simultaneously solid welding wire backing weld seam is without coating and welding slag, burns or the defect such as slag inclusion, pore occurs in root thus avoiding front submerged-arc welding under wide arc gap.The schematic diagram of Fig. 3 front backing welding.Labelling A in Fig. 3 represents the weld seam of front backing welding.
106. front cosmetic welding.Carry out submerged-arc welding with small area analysis in groove front, front cosmetic welding process is not burnt the weld seam of backing welding.In one embodiment, front cosmetic welding adopts the solid welding wire of diameter 4.0mm to carry out submerged-arc welding, and front cosmetic welding fusion penetration h2 is less than front backing welding fusion penetration h1, i.e. h2≤h1, it is prevented that burnt by backing weld seam.It is also preferred that the left front cosmetic welding adopts small area analysis exchange submerged-arc welding.Front cosmetic welding adopts small area analysis submerged-arc welding SAW, and electric current selects should ensure that and do not burnt by backing weld seam, if backing weld seam is burnt by front submerged-arc welding, can cause dropping down under liquid metal, the defect such as being mingled with easily occurs in root, pore, incomplete fusion.Fig. 4 discloses the schematic diagram of front cosmetic welding.Labelling B in Fig. 4 represents the weld seam of front cosmetic welding.
108. back side submerged-arc welding.Without carbon dig back chipping directly carry out submerged-arc welding at the groove back side, the electric current of back side submerged-arc welding make submerged-arc welding fusion penetration h3 in the back side be cut deal thickness T 3/4.In one embodiment, back side submerged-arc welding adopts the solid welding wire of diameter 4.0mm to carry out submerged-arc welding, fusion penetration through welding root, and submerged-arc welding fusion penetration h3 in the back side meets T-h1 < h3≤T, and wherein T is the thickness of slab of cut deal, and h1 is front backing welding fusion penetration.It is also preferred that the left back side submerged-arc welding adopts heavy DC submerged-arc welding.Back side submerged-arc welding adopts big electric current, the emersion effectively ensure root pore, being mingled with, root complete penetration, it is to avoid weld defect, it is ensured that UT and RT is qualified, welding quality stable.Thus the back side does not need carbon arc air gouging back chipping.It should be noted that submerged-arc welding electric current in the back side is unsuitable excessive, it is prevented that along with constantly carrying out of welding, heat continually enters, fusion penetration increases, and is burnt by test plate (panel) in the later stage, or is slightly turned down by electric current in the later stage.Fig. 5 discloses the schematic diagram of back side submerged-arc welding.Labelling C in Fig. 5 represents the weld seam of back side submerged-arc welding.
In one embodiment, the thickness of slab of the cut deal that unclear welding procedure 100 of the cut deal I type groove wide arc gap of the present invention uses is 7～14mm.
Below for thickness of slab be 10mm cut deal, root gap δ be 3mm wide arc gap unclear welding job of I type groove illustrate:
1) assembling before weldering: root fit-up gap δ is 3mm, waits gap to assemble.Adopt φ 1.2mm solid welding wire gas shielded arc welding spot welding location.
2) solid welding wire gas shielded arc welding (GMAW) backing welding: adopt φ 1.2mm solid welding wire gas shielded arc welding bottoming, electric current I=150-200A, voltage U=23-25V, welding speed V=200-300mm/min.
3) front submerged-arc welding (front SAW): adopt the welding wire of φ 4.0mm to carry out front submerged-arc welding, electric current I=400-500A, voltage U=29-31V, welding speed V=400-500mm/min.
4) back side submerged-arc welding (back side SAW): adopt the welding wire of φ 4.0mm to carry out back side submerged-arc welding, welding current I=700A, coordinate voltage U=31-35V, welding speed V=400-500mm/min.
Adopting this kind of welding method, select rational electric current, be equipped with suitable voltage and speed of welding, carry out the cut deal wide arc gap I unclear root bead of type groove and connect, appearance of weld is good, meets first-order weld requirement, without any defect.
The suitability in I type groove welding of the cut deal I unclear welding procedure of type groove wide arc gap of the present invention is higher, and article on plasma cut quality is not high, fit-up gap is big, wrong variable change is insensitive, it may be achieved the plane back chipping welding of the wide arc gap I type groove back side not carbon.Welding quality stable, weld seam meets first-order weld requirement, and 100%UT detects a flaw, and 100%RT film making is qualified.Cut deal does not need flame cutting or machining groove, and fit-up gap requires not tight, and welding production efficiency is high.
Above-described embodiment is available to be familiar with person in the art and realizes or use the present invention's; above-described embodiment can be made various modifications or be varied without departing from the invention thought of the present invention by those skilled in the art; thus protection scope of the present invention is not limit by above-described embodiment, and the maximum magnitude of the inventive features that claims are mentioned should be consistent with.
Claims (8)
1. cut deal I unclear welding procedure of type groove wide arc gap, it is characterised in that including:
Installation step before cutting and weldering, adopts plasma cutting cut deal, and cut deal assembling is formed I type groove, and groove root gap is less than or equal to 3mm, and groove frontal clearance is less than or equal to 5mm；
Front backing welding, swings welding manner with small area analysis and carries out backing welding in groove front, and front backing welding forms weld seam but not burn-through in wide arc gap, and front backing welding fusion penetration h1 is the 1/3～2/3 of cut deal thickness T, the electric current I=150-200A of front backing welding；
Front cosmetic welding, carries out submerged-arc welding with small area analysis in groove front, does not burn the weld seam of backing welding in the cosmetic welding process of front, and front cosmetic welding fusion penetration h2 is less than front backing welding fusion penetration h1, the electric current I=400-500A of front cosmetic welding；
Back side submerged-arc welding, digs back chipping without carbon and directly carries out submerged-arc welding at the groove back side, the electric current of back side submerged-arc welding make submerged-arc welding fusion penetration h3 in the back side be cut deal thickness T 3/4, and h3 meets T-h1 < h3≤T；
The thickness of slab of wherein said cut deal is 10mm.
2. cut deal I unclear welding procedure of type groove wide arc gap as claimed in claim 1, it is characterised in that described cutting and the front installation step of weldering include adopting gas metal-arc welding GMAW to carry out spot welding reinforcing, and welding adopts solid welding wire.
3. cut deal I unclear welding procedure of type groove wide arc gap as claimed in claim 1, it is characterised in that described front backing welding adopts gas metal-arc welding GMAW, and protective gas is CO2, use solid welding wire welding.
4. cut deal I unclear welding procedure of type groove wide arc gap as claimed in claim 3, it is characterised in that the solid welding wire welding that described front backing welding adopts diameter to be 1.2mm.
5. cut deal I unclear welding procedure of type groove wide arc gap as claimed in claim 1, it is characterised in that
Front cosmetic welding adopts the solid welding wire of diameter 4.0mm to carry out submerged-arc welding.
6. cut deal I unclear welding procedure of type groove wide arc gap as claimed in claim 5, it is characterised in that front cosmetic welding adopts small area analysis exchange submerged-arc welding, the electric current I=400-500A of front cosmetic welding.
7. cut deal I unclear welding procedure of type groove wide arc gap as claimed in claim 1, it is characterised in that back side submerged-arc welding adopts the solid welding wire of diameter 4.0mm to carry out submerged-arc welding.
8. cut deal I unclear welding procedure of type groove wide arc gap as claimed in claim 7, it is characterised in that back side submerged-arc welding adopts heavy DC submerged-arc welding, the electric current I=700A of back side submerged-arc welding.
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| CN201210431664.4A CN103785932B (en) | 2012-11-01 | 2012-11-01 | Cut deal I unclear welding procedure of type groove wide arc gap |
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| CN201210431664.4A CN103785932B (en) | 2012-11-01 | 2012-11-01 | Cut deal I unclear welding procedure of type groove wide arc gap |
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| CN103785932A CN103785932A (en) | 2014-05-14 |
| CN103785932B true CN103785932B (en) | 2016-06-29 |
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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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| CN104526136A (en) * | 2014-11-27 | 2015-04-22 | 上海江南长兴造船有限责任公司 | Method for welding large-gap groove through submerged automatic arc welding |
| CN104801835A (en) * | 2015-02-26 | 2015-07-29 | 胜利油田龙玺石油工程服务有限责任公司 | Method for welding without back chipping for ice resisting and water resisting pipe joint |
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| CN104985292A (en) * | 2015-06-30 | 2015-10-21 | 柳州金茂机械有限公司 | Thick plate welding process |
| CN106392272A (en) * | 2016-11-18 | 2017-02-15 | 江苏双良锅炉有限公司 | Y-shaped groove back-chipping-free submerged-arc welding technology for moderately thick plate in boiler and pressure container |
| CN106944724A (en) * | 2017-05-09 | 2017-07-14 | 中建钢构有限公司 | Unclear welding method of submerged-arc welding full penetration |
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| CN108856969A (en) * | 2018-07-26 | 2018-11-23 | 云南昆钢钢结构股份有限公司 | Bevelled welding method is exempted from a kind of full submerged-arc welding of cut deal T junction |
| CN113305404B (en) * | 2021-05-31 | 2022-10-25 | 二十二冶集团装备制造有限公司 | Single-wire submerged arc welding process for 30-50mm thick steel plate |
| CN115464241A (en) * | 2022-08-31 | 2022-12-13 | 中船黄埔文冲船舶有限公司 | Welding method for medium plate |
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