CN105562896A - Welding process of downward fillet welding in vertical position of gas shielded welding - Google Patents
Welding process of downward fillet welding in vertical position of gas shielded welding Download PDFInfo
- Publication number
- CN105562896A CN105562896A CN201610078673.8A CN201610078673A CN105562896A CN 105562896 A CN105562896 A CN 105562896A CN 201610078673 A CN201610078673 A CN 201610078673A CN 105562896 A CN105562896 A CN 105562896A
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- China
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- welding
- vertical position
- gas shielded
- speed
- downward fillet
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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
- B23K9/16—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
- B23K9/02—Seam welding; Backing means; Inserts
Abstract
The invention discloses a welding process of downward fillet welding in a vertical position of gas shielded welding. A welding method of a flux-cored wire carbon dioxide arc welding is adopted in the downward fillet welding process in the vertical position; a workpiece and a welding gun are connected by a direct-current reverse connecting method; the welding current is adjusted within 260-280 A; the welding arc voltage is adjusted within 31-32 V; the welding is performed from top to bottom by a multi-pass welding mode; the welding speed is 60-100 cm/m; and the thickness of single welding line is controlled at 2 mm. The welding process of downward fillet welding in the vertical position of gas shielded welding can obtain a more perfect welding line structure without needing to cleaning welding slag through polishing after welding through control of the parameters, cannot influence the welding line quality by existence of workshop primer with a normal dry film thickness in the welding position, reduces an after-welding welding line correction procedure, facilitates to reduce environmental pollution, can effectively save resources, and is applied to the field of welding processes.
Description
Technical field
The present invention relates to welding procedure field, particularly relate to the welding procedure of the downward fillet welding in the vertical position of a kind of gas shielded arc welding.
Background technology
Under flux-cored wire semi-automatic specialized for carbon dioxide gas protection progress of weld, fillet welding in the vertical position welding procedure has the advantages that welding deformation is little, appearance of weld is attractive in appearance, is particularly suitable for Ship Structure 8mm with the welding of lower thin sheet.But because downward welding in the vertical position technique welding penetration is relatively shallow, in addition speed of welding is fast, the reasons such as welder's manual operations welding gun is unstable, be easy to occur incomplete root penetration, pore, dreg defect when corner connection is sewn on welding, the shop primer of another hull structural member can aggravate the generation of above-mentioned defect.These defect problems govern shipyard always and carry out welding procedure certification to classification society's application, and because technique is not by the welding procedure certification of classification society, downward fillet welding in the vertical position technique can not be used for the welding procedure of hull product structure certainly.
Summary of the invention
The object of the present invention is to provide and a kind ofly can better improve welding quality and the welding process welding procedure of the downward fillet welding in the vertical position of gas shielded arc welding that allows shop primer to exist.
The technical solution used in the present invention is:
The welding procedure of the downward fillet welding in the vertical position of a kind of gas shielded arc welding; the welding method of flux-cored wire carbon dioxide gas arc welding is adopted in downward fillet welding in the vertical position welding process; DC reverse connection method is adopted to connect workpiece and welding gun; and regulate welding current at 260 ~ 280A; regulate welding arc voltage at 31 ~ 32V; adopt the mode of multi-pass welding to weld from top to bottom, speed of welding is 60 ~ 100 centimeters/minute, and single-pass welding THICKNESS CONTROL is at 2mm.
Be further used as the improvement of technical solution of the present invention, in welding process, the speed of welding being positioned at root pass is 93 centimeters/minute, and the speed of welding being positioned at remaining welding bead is 73 centimeters/minute.
Be further used as the improvement of technical solution of the present invention, welding current is 273A.
Be further used as the improvement of technical solution of the present invention, the welding wire adopted in welding process meets GB/T10045E501T-1 standard, and the diameter of welding wire is 1.2mm.
The invention has the beneficial effects as follows: the welding procedure of the downward fillet welding in the vertical position of this gas shielded arc welding is by the control of above-mentioned parameter; without the need to clearing up welding slag by polishing after welding completes; more perfect welding line structure can be obtained; and do not affect weldquality because welding position there is the shop primer of normal build; simultaneously; decrease postwelding weld seam correction process, be conducive to reducing environmental pollution and effectively economizing on resources.
Detailed description of the invention
The present invention is the welding procedure of the downward fillet welding in the vertical position of a kind of gas shielded arc welding; the welding method of flux-cored wire carbon dioxide gas arc welding is adopted in downward fillet welding in the vertical position welding process; DC reverse connection method is adopted to connect workpiece and welding gun; and regulate welding current at 260 ~ 280A; regulate welding arc voltage at 31 ~ 32V; adopt the mode of multi-pass welding to weld from top to bottom, speed of welding is 60 ~ 100 centimeters/minute, and single-pass welding THICKNESS CONTROL is at 2mm.
The welding procedure of the downward fillet welding in the vertical position of this gas shielded arc welding is by the control of above-mentioned parameter; without the need to clearing up welding slag by polishing after welding completes; more perfect welding line structure can be obtained; and do not affect weldquality because welding position there is the shop primer of normal build; simultaneously; decrease postwelding weld seam correction process, be conducive to reducing environmental pollution and effectively economizing on resources.
As the preferred embodiment of the present invention, in welding process, the speed of welding being positioned at root pass is 93 centimeters/minute, and the speed of welding being positioned at remaining welding bead is 73 centimeters/minute.
As the preferred embodiment of the present invention, welding current is 273A.
As the preferred embodiment of the present invention, the welding wire adopted in welding process meets GB/T10045E501T-1 standard, and the diameter of welding wire is 1.2mm.
In welding process, adopt DC reverse connection method, i.e. welding gun side joint positive pole, welding work pieces connects negative pole, ensures that technique is to the adaptability of welding wire.
The deduction that the desirable welding current of semi-automatic vertical downward fillet welding combines through test of many times and theory and practice, determine at 260 ~ 280 amperes, and be finally chosen to be 273 amperes, 80 ~ 100A larger than the vertical-up welding of common vertical corner connection seam, object is under the speed of welding of regulation, obtain larger welding penetration and welding deposition efficiency, ensures the root through welding of angle welding and higher welding efficiency.Vertical downward weldering should adopt high-speed welding, if too small welding current can make welding pool fusion penetration inadequate, the root of weld easily occurs incomplete penetration defect.And too large welding current can accelerate the deposition of welding wire, require that welder transports rifle speed and accelerates, increase the welding difficulty of welder, welding quality is difficult to ensure.
Welding arc voltage is set as 31 volts, and 4 ~ 6V larger than the welding arc voltage of the vertical-up welding of common vertical corner connection seam, welds large 2 ~ 3V downwards than robot automatic standing.Reason is that weldingvoltage and welding current are matched on the one hand, maintains welding arc stablility, ensures appearance of weld quality; Widening welding arc weld width by increasing weldingvoltage on the other hand, to make up the arc position deviation caused due to welder's hand torch operation shakiness, avoiding corner connection to stitch root and causing occurring incomplete penetration defect because of manually-operated error.
In welding process, the speed of welding of welding bead root is 93 cm per minute, and residue welding bead is 73 cm per minute, is 3 ~ 4 times of the vertical-up welding speed of welding of common fillet welding.
Adopt high speed welding, reason is to improve welding efficiency on the one hand, second aspect reason is welded by high speed, reduce the thermal weld stress amount of unit length inside weld, thus reduction welding deformation, third aspect reason is after arc-melting welding wire and mother metal, the molten steel of fusing is affected by gravity and can trickles downwards, trickle for avoiding molten steel and cause weld appearance shaping to be deteriorated, the cooling of welding pool need be accelerated by accelerating speed of welding, ensure that molten steel can become weld seam by quick solidification before trickling downwards, avoiding weld seam to drop affects weld appearance forming quality.
In the normal state, the approach controlling molten steel solidification speed controls speed of welding.But too high weldering speed can make difference variation in the weld seam short time make greatly weld seam cooling shrinkage stress excessive, causes weld seam to occur crack defect, the weldering speed of equalization point need be found through repeatedly carrying out soldering test.Experiment proves, the vertical downward weldering speed of this technique middle ideal is 60 ~ 100 cm per minute, and root pass adopts the higher weldering speed of 93 cm per minute, reason is that the seam cross-section of root 2mm thickness is less than the cross section of subsequent passes, need suitably to increase weldering speed, make weld seam be about the thickness of 2mm, and follow-up need shunting to weld welding bead and second to be consistent thickness.
Welding by this technique the bead thickness come can make the welding slag of welding pool and H pore discharge in time, in flux-cored wire, the medicinal powder of Welding Metallurgy becomes welding slag through the reaction of complicated metallurgical chemistry again through high arc temperature decomposition in welding process on the one hand, simultaneously, also the generation of welding slag can be increased, adsorbed water, the crystallization water, water of constitution that welding wire and medicinal powder thereof contain or melt hydrogen etc. and become H element to form H pore at pyrolytic after shop primer welding.Prove through soldering test, single-pass welding THICKNESS CONTROL can effectively arrange welding slag and pore at 2mm.
Certainly, the invention is not limited to above-mentioned embodiment, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (4)
1. the welding procedure of the downward fillet welding in the vertical position of gas shielded arc welding; it is characterized in that: the welding method adopting flux-cored wire carbon dioxide gas arc welding downwards in fillet welding in the vertical position welding process; DC reverse connection method is adopted to connect workpiece and welding gun; and regulate welding current at 260 ~ 280A; regulate welding arc voltage at 31 ~ 32V; adopt the mode of multi-pass welding to weld from top to bottom, speed of welding is 60 ~ 100 centimeters/minute, and single-pass welding THICKNESS CONTROL is at 2mm.
2. the welding procedure of the downward fillet welding in the vertical position of gas shielded arc welding according to claim 1, is characterized in that: in welding process, and the speed of welding being positioned at root pass is 93 centimeters/minute, and the speed of welding being positioned at remaining welding bead is 73 centimeters/minute.
3. the welding procedure of the downward fillet welding in the vertical position of gas shielded arc welding according to claim 2, is characterized in that: described welding current is 273A.
4. according to the welding procedure of the downward fillet welding in the vertical position of gas shielded arc welding in claims 1 to 3 described in any, it is characterized in that: the welding wire adopted in welding process meets GB/T10045E501T-1 standard, the diameter of welding wire is 1.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610078673.8A CN105562896A (en) | 2016-02-04 | 2016-02-04 | Welding process of downward fillet welding in vertical position of gas shielded welding |
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| CN201610078673.8A CN105562896A (en) | 2016-02-04 | 2016-02-04 | Welding process of downward fillet welding in vertical position of gas shielded welding |
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| CN105562896A true CN105562896A (en) | 2016-05-11 |
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| CN201610078673.8A Pending CN105562896A (en) | 2016-02-04 | 2016-02-04 | Welding process of downward fillet welding in vertical position of gas shielded welding |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270959A (en) * | 2016-10-19 | 2017-01-04 | 李占鹏 | A kind of Flat-bulb Steel for Ship Use fillet welding welding technique |
| CN110653462A (en) * | 2019-09-18 | 2020-01-07 | 江苏新扬子造船有限公司 | Fitting-out piece vertical angle welding method |
| CN110681954A (en) * | 2019-10-30 | 2020-01-14 | 广船国际有限公司 | Method for assembling fillet weld at vertical position of thin plate |
| CN111604624A (en) * | 2020-05-29 | 2020-09-01 | 广船国际有限公司 | Test device for obtaining weld heat cracks and evaluation method |
| CN112719517A (en) * | 2020-12-16 | 2021-04-30 | 中车眉山车辆有限公司 | Fusion welding connection process for special-shaped welding seams of steel structure car body |
| CN113263282A (en) * | 2021-05-19 | 2021-08-17 | 烟台大学 | All-position suspension-condensation type vertical welding device between gapless materials |
| CN114905115A (en) * | 2022-06-30 | 2022-08-16 | 中船黄埔文冲船舶有限公司 | Robot welding method and device for assembling vertical welding seams |
| CN115041856A (en) * | 2022-06-30 | 2022-09-13 | 中船黄埔文冲船舶有限公司 | Welding method and device for intermediate-assembled vertical fillet weld |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270959A (en) * | 2016-10-19 | 2017-01-04 | 李占鹏 | A kind of Flat-bulb Steel for Ship Use fillet welding welding technique |
| CN110653462A (en) * | 2019-09-18 | 2020-01-07 | 江苏新扬子造船有限公司 | Fitting-out piece vertical angle welding method |
| CN110681954A (en) * | 2019-10-30 | 2020-01-14 | 广船国际有限公司 | Method for assembling fillet weld at vertical position of thin plate |
| CN111604624A (en) * | 2020-05-29 | 2020-09-01 | 广船国际有限公司 | Test device for obtaining weld heat cracks and evaluation method |
| CN112719517A (en) * | 2020-12-16 | 2021-04-30 | 中车眉山车辆有限公司 | Fusion welding connection process for special-shaped welding seams of steel structure car body |
| CN113263282A (en) * | 2021-05-19 | 2021-08-17 | 烟台大学 | All-position suspension-condensation type vertical welding device between gapless materials |
| CN114905115A (en) * | 2022-06-30 | 2022-08-16 | 中船黄埔文冲船舶有限公司 | Robot welding method and device for assembling vertical welding seams |
| CN115041856A (en) * | 2022-06-30 | 2022-09-13 | 中船黄埔文冲船舶有限公司 | Welding method and device for intermediate-assembled vertical fillet weld |
| CN114905115B (en) * | 2022-06-30 | 2023-12-26 | 中船黄埔文冲船舶有限公司 | Robot welding method and device for middle-assembling vertical welding seam |
| CN115041856B (en) * | 2022-06-30 | 2024-03-26 | 中船黄埔文冲船舶有限公司 | Welding method and device for middle-assembling fillet weld |
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Application publication date: 20160511 |
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