CN109202227A - A kind of effective operating procedure for inhibiting almag TIG weld defect - Google Patents
A kind of effective operating procedure for inhibiting almag TIG weld defect Download PDFInfo
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- CN109202227A CN109202227A CN201811172567.1A CN201811172567A CN109202227A CN 109202227 A CN109202227 A CN 109202227A CN 201811172567 A CN201811172567 A CN 201811172567A CN 109202227 A CN109202227 A CN 109202227A
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- welding
- weldment
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- groove
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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
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
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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
- B23K9/235—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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to the welding fields of almag argon arc welding, and in particular to a kind of operating procedure for effectively inhibiting almag TIG weld defect.The groove type of use: when weldment is located at vertical station, upper bevel angle is 40 °, and lower bevel angle is 35 °, and the reconditioning of weldment root goes out 10 ° of round and smooth chamfering；When weldment is located at horizontal station, two sides bevel angle is 35 °, and the reconditioning of weldment root goes out 10 ° of round and smooth chamfering, is conducive to hydrogen blistering floating and overflows, to avoid the formation of the defect of stomata, crackle, root incomplete fusion.The mode that electric arc slightly stops after striking achievees the effect that preheat groove, easy to operate practical.
Description
Technical field
The present invention relates to the welding fields of almag argon arc welding, and in particular to a kind of effectively to inhibit almag TIG weldering
Connect the operating procedure of defect.
Background technique
With progress scientific and technical in recent years and the rapid development of industrial circle, to the need of almag welded unit
Ask also growing.General almag weld it is more using TIG welding (GTAW/TIG) and
The welding method of metal inert gas arc welding (GMAW/MIG).Since the specific heat capacity and the latent heat of fusion of magnalium are small,
It is qualified to obtain to be mainly adjusted by welding sequence when therefore welding, use high current, fast welding and the measures such as rigidly fix
Welding point.To the preparation and the not specific regulation of specific welding operation technique before welding.The prior art is easily formed
The defect of stomata, crackle, root incomplete fusion affects welding point internal soundness, additionally, due to the lack of standardization of operation technique,
Cause appearance of weld quality.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of defect raising welderings for avoiding the formation of stomata, crackle, root incomplete fusion
The operating procedure of effective inhibition almag TIG weld defect of quality is connect,
The present invention is achieved by the following technical solutions:
A kind of effective operating procedure for inhibiting almag TIG weld defect, comprising the following steps:
A) open up groove: when weldment is located at vertical station, upper bevel angle is 40 °, and lower bevel angle is 35 °, and weldment root is repaired
Grind 10 ° of round and smooth chamfering；When weldment is located at horizontal station, two sides bevel angle is 35 °, and the reconditioning of weldment root goes out 10 °
Round and smooth chamfering；
B) striking: before formal welding, the striking on test plate (panel), cease arc after the pilling of tungsten electrode front end, start to weld on workpiece；
C) preheat: electric arc slightly stops after striking, preheats to groove, starts addition weldering after weld pool surface is slightly recessed
Silk, linear type move forward welding gun；
D) angle of welding gun, welding wire and workpiece: welding gun is vertical with workpiece in welding process, and the angle of welding wire and workpiece is no more than
15°；
E) spot welding: butt-welding fitting carries out spot welding；
F) bottoming filling welding: using in such a way that molten bath top discontinuously adds silk, welding gun is moved in a straight line after filling up groove, and
Guarantee to cease arc on groove；When bottom welding to spot welding position, spot welded joint is cleaned out, backing weld seam both ends want reconditioning to go out
It is convenient for subsequent connector in slope；
G) cover welding: welding gun running track will be at oblique circle.
Further, further include the drying of protective gas and welding wire:
The pipeline of protective gas keeps drying using device for drying and filtering；Welding wire is polished using alloy cutting sheet, cleans out welding wire
And the moisture and oxidation film on base material surface；
Windproof and rain proof measure is carried out in welding region, reduces the air flowing and air humidity at welding scene.
Further, welding parameter are as follows: striking/breath arc current 20A, bottom welding electric current select 170A-185A, cosmetic welding
Electric current selection 145A-160A is met, bias electric current 100A, speed of welding (12-15) cm/min are exchanged.
Acquired beneficial effect is the present invention compared with prior art: the groove type of use: weldment is located at vertical work
When position, upper bevel angle is 40 °, and lower bevel angle is 35 °, and the reconditioning of weldment root goes out 10 ° of round and smooth chamfering；Weldment is located at level
When station, two sides bevel angle is 35 °, and the reconditioning of weldment root goes out 10 ° of round and smooth chamfering, is conducive to hydrogen blistering floating and overflows,
To avoid the formation of the defect of stomata, crackle, root incomplete fusion.The mode that electric arc slightly stops after striking, which reaches, preheats groove
Effect, it is easy to operate practical.
Welding gun is advanced using linear type when bottoming is filled, and welding gun reduces stomata using the advance of oblique circular trace when capping
Generation, further improve welding quality.
Operation of the present invention is simple, practical, effectively avoids the formation of weld seam internal porosity, crack and unmlted welding,
The generation of tungsten inclusion is effectively avoided simultaneously.
Detailed description of the invention
Fig. 1 is groove schematic diagram when weldment of the present invention is located at vertical station；
Fig. 2 is groove schematic diagram when weldment of the present invention is located at horizontal station.
Specific embodiment
The present invention is described in more detail with reference to the accompanying drawing.
Embodiment 1
As shown in Figure 1, when weldment is located at vertical station (weld seam is in the position 2G), it is a kind of effectively to inhibit almag TIG weld
The operating procedure of defect, comprising the following steps:
A) it opens up groove: being overflowed to be conducive to hydrogen blistering floating, avoid the formation of the defect of stomata, crackle, root incomplete fusion, go up a slope
Bicker degree is 40 °, and lower bevel angle is 35 °, and the reconditioning of weldment root goes out 10 ° of round and smooth chamfering；
B) striking: before formal welding, the striking on test plate (panel), cease arc after the pilling of tungsten electrode front end, start to weld on workpiece；
C) preheat: electric arc slightly stops after striking, preheats to groove, and such preheating method is simple and practical；When molten bath table
Face starts to add welding wire after being slightly recessed, and linear type moves forward welding gun；
D) angle of welding gun, welding wire and workpiece: welding gun is vertical with workpiece in welding process, and the angle of welding wire and workpiece is no more than
15°；
E) spot welding: butt-welding fitting carries out spot welding, the welding parameter of spot welding and operation technique will compared with technology spot welding mode it is identical；
F) using in such a way that molten bath top discontinuously adds silk, stomata, Crack prevention, root bottoming filling welding: to be formed in order to reduce
The defect of portion's incomplete fusion, welding gun moves in a straight line after filling up groove, and guarantees to cease arc on groove；Bottom welding is to putting welding position
When setting, spot welded joint is cleaned out, backing weld seam both ends want reconditioning to go out slope convenient for subsequent connector；
G) cover welding: welding gun running track, to increase the area in molten bath, will be convenient for hydrogen quick from molten bath at oblique circle
Evolution reduces the defect for forming stomata, Crack prevention, root incomplete fusion.
It further, further include the drying of protective gas and welding wire.The water content of strict control protective gas and welding wire
The generation of stomata when being avoided that welding.
The pipeline of protective gas keeps drying using device for drying and filtering；Welding wire is polished using alloy cutting sheet, is cleaned out
Welding wire and the moisture and oxidation film on base material surface prevent adsorbed moisture in un-cleared oxidation film from generating weld porosity.Clearly
Safeguard measure is carried out after reason is clean, prevents from polluting once again.
Windproof and rain proof measure is carried out in welding region, reduces the air flowing and air humidity at welding scene.
In the present embodiment, welding parameter are as follows: striking/breath arc current 20A, bottom welding electric current select 170A-185A, capping
Welding current selects 145A-160A, exchanges bias electric current 100A, speed of welding (12-15) cm/min.
Effective operating procedure for inhibiting almag TIG weld defect through the invention, almag weld seam of having determined
The problem of internal porosity, crack and unmlted welding, greatly improves welding efficiency and welding quality.Also solves weldering simultaneously
Seam surface shape unsightly, non-uniform problem.
Embodiment 2
As shown in Fig. 2, (weld seam is in the position 1G) is a kind of effectively to inhibit almag TIG weld when weldment is located at horizontal station
The operating procedure of defect, comprising the following steps:
A) it opens up groove: being overflowed to be conducive to hydrogen blistering floating, avoid the formation of the defect of stomata, crackle, root incomplete fusion, two sides
Bevel angle is 35 °, and the reconditioning of weldment root goes out 10 ° of round and smooth chamfering；
B) striking: before formal welding, the striking on test plate (panel), cease arc after the pilling of tungsten electrode front end, start to weld on workpiece；
C) preheat: electric arc slightly stops after striking, preheats to groove, and such preheating method is simple and practical；When molten bath table
Face starts to add welding wire after being slightly recessed, and linear type moves forward welding gun；
D) angle of welding gun, welding wire and workpiece: welding gun is vertical with workpiece in welding process, and the angle of welding wire and workpiece is no more than
15°；
E) spot welding: butt-welding fitting carries out spot welding, the welding parameter of spot welding and operation technique will compared with technology spot welding mode it is identical；
F) using in such a way that molten bath top discontinuously adds silk, stomata, Crack prevention, root bottoming filling welding: to be formed in order to reduce
The defect of portion's incomplete fusion, welding gun moves in a straight line after filling up groove, and guarantees to cease arc on groove；Bottom welding is to putting welding position
When setting, spot welded joint is cleaned out, backing weld seam both ends want reconditioning to go out slope convenient for subsequent connector；
G) cover welding: welding gun running track, to increase the area in molten bath, will be convenient for hydrogen quick from molten bath at oblique circle
Evolution reduces the defect for forming stomata, Crack prevention, root incomplete fusion.
It further, further include the drying of protective gas and welding wire.The water content of strict control protective gas and welding wire
The generation of stomata when being avoided that welding.
The pipeline of protective gas keeps drying using device for drying and filtering；Welding wire is polished using alloy cutting sheet, is cleaned out
Welding wire and the moisture and oxidation film on base material surface prevent adsorbed moisture in un-cleared oxidation film from generating weld porosity.Clearly
Safeguard measure is carried out after reason is clean, prevents from polluting once again.
Windproof and rain proof measure is carried out in welding region, reduces the air flowing and air humidity at welding scene.
In the present embodiment, welding parameter are as follows: striking/breath arc current 20A, bottom welding electric current select 170A-185A, capping
Welding current selects 145A-160A, exchanges bias electric current 100A, speed of welding (12-15) cm/min.
Effective operating procedure for inhibiting almag TIG weld defect through the invention, almag weld seam of having determined
The problem of internal porosity, crack and unmlted welding, greatly improves welding efficiency and welding quality.Also solves weldering simultaneously
Seam surface shape unsightly, non-uniform problem.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of operating procedure for effectively inhibiting almag TIG weld defect, which comprises the following steps:
A) open up groove: when weldment is located at vertical station, upper bevel angle is 40 °, and lower bevel angle is 35 °, and weldment root is repaired
Grind 10 ° of round and smooth chamfering；When weldment is located at horizontal station, two sides bevel angle is 35 °, and the reconditioning of weldment root goes out 10 °
Round and smooth chamfering；
B) striking: before formal welding, the striking on test plate (panel), cease arc after the pilling of tungsten electrode front end, start to weld on workpiece；
C) preheat: electric arc slightly stops after striking, preheats to groove, starts addition weldering after weld pool surface is slightly recessed
Silk, linear type move forward welding gun；
D) angle of welding gun, welding wire and workpiece: welding gun is vertical with workpiece in welding process, and the angle of welding wire and workpiece is no more than
15°；
E) spot welding: butt-welding fitting carries out spot welding；
F) bottoming filling welding: using in such a way that molten bath top discontinuously adds silk, welding gun is moved in a straight line after filling up groove, and
Guarantee to cease arc on groove；When bottom welding to spot welding position, spot welded joint is cleaned out, backing weld seam both ends want reconditioning to go out
It is convenient for subsequent connector in slope；
G) cover welding: welding gun running track will be at oblique circle.
2. effective operating procedure for inhibiting almag TIG weld defect according to claim 1, which is characterized in that also
Including the drying of protective gas and welding wire:
The pipeline of protective gas keeps drying using device for drying and filtering；Welding wire is polished using alloy cutting sheet, cleans out welding wire
And the moisture and oxidation film on base material surface；
Windproof and rain proof measure is carried out in welding region, reduces the air flowing and air humidity at welding scene.
3. effective operating procedure for inhibiting almag TIG weld defect according to claim 1, which is characterized in that weldering
Connect parameter are as follows: striking/breath arc current 20A, bottom welding electric current select 170A-185A, and cover welding electric current selects 145A-
160A exchanges bias electric current 100A, speed of welding (12-15) cm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811172567.1A CN109202227A (en) | 2018-10-09 | 2018-10-09 | A kind of effective operating procedure for inhibiting almag TIG weld defect |
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| CN201811172567.1A CN109202227A (en) | 2018-10-09 | 2018-10-09 | A kind of effective operating procedure for inhibiting almag TIG weld defect |
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| CN109202227A true CN109202227A (en) | 2019-01-15 |
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Cited By (5)
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|---|---|---|---|---|
| CN110587079A (en) * | 2019-10-24 | 2019-12-20 | 青岛磊金德冲压件有限公司 | Method for arc welding of stainless steel and dissimilar materials |
| CN112975069A (en) * | 2019-12-17 | 2021-06-18 | 中国核工业二三建设有限公司 | Automatic welding process for controlling surplus height of welding line in pipeline |
| CN113664339A (en) * | 2021-06-18 | 2021-11-19 | 中国化学工程第十四建设有限公司 | Aluminum magnesium alloy welding method |
| CN114273759A (en) * | 2021-12-30 | 2022-04-05 | 东方电气（武汉）核设备有限公司 | Welding method of reactor core shroud assembly |
| GB2614714A (en) * | 2022-01-12 | 2023-07-19 | Lead Tech Limited | Joining of lead and lead alloys |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112975069A (en) * | 2019-12-17 | 2021-06-18 | 中国核工业二三建设有限公司 | Automatic welding process for controlling surplus height of welding line in pipeline |
| CN113664339A (en) * | 2021-06-18 | 2021-11-19 | 中国化学工程第十四建设有限公司 | Aluminum magnesium alloy welding method |
| CN114273759A (en) * | 2021-12-30 | 2022-04-05 | 东方电气（武汉）核设备有限公司 | Welding method of reactor core shroud assembly |
| GB2614714A (en) * | 2022-01-12 | 2023-07-19 | Lead Tech Limited | Joining of lead and lead alloys |
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Application publication date: 20190115 |