CN109434254A - The welding procedure of large scale equipment support end cover board - Google Patents
The welding procedure of large scale equipment support end cover board Download PDFInfo
- Publication number
- CN109434254A CN109434254A CN201811249155.3A CN201811249155A CN109434254A CN 109434254 A CN109434254 A CN 109434254A CN 201811249155 A CN201811249155 A CN 201811249155A CN 109434254 A CN109434254 A CN 109434254A
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- China
- Prior art keywords
- welding
- cover board
- positioner
- large scale
- support end
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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
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
Present invention discloses a kind of welding procedure of large scale equipment support end cover board, includes the following steps: step of polishing before S1, weldering, check welding equipment and positioner, polish cover board to be welded and cover board flange component；Cover board and cover board flange component are combined by S2, pre-welding step, and carry out pre-welding to binding site；S3, welding step, by after pre-welding cover board and cover board flange component be fixedly installed on positioner, will be adjusted on the positioner to welding post, welding processing then carried out to the cover board and cover board flange component；S4, detecting step will terminate to weld and complete cooling finished product to remove from positioner, and detect to finished product.Welding procedure quality of the invention is stablized, and root is fused, can control weld heat input well.Weld seam after forming has good compactness, and shaping surface beauty greatly improves the qualification rate of weld seam helium mass spectrum leak detection without open defect.
Description
Technical field
The present invention relates to a kind of welding procedure, in particular to a kind of welding procedure of large scale equipment support end cover board,
Belong to machined part processing technology field.
Background technique
Equipment support end cover board, also referred to as end socket, is essential important component in all kinds of large scale equipments in the industry.With
In medical field for used low-temperature superconducting nuclear magnetic resonance vacuum tank, with regard to needing to use this cover board on container.By
Particularity in medical field, the requirement to equipment precision are very high, correspondingly, the requirement for weld seam on cover board is also extremely tight
It is severe.
Traditional hand tungsten argon arc welding is a kind of welding method of high quality, therefore extensive in industrial processes industry
Ground application.Hand tungsten argon arc welding has the spies such as current density is big, heat is concentrated, deposition rate is high, the fast, easy arc striking of speed of welding
Point, therefore the application environment high in many quality requirements, such as in pipeline and pressure vessel manufacturing industry, in order to reach highest
Processing quality, this welding procedure is all preferred.But in actual process, even with this welding procedure,
Also it is difficult to ensure that the finished product processed be every time it is perfect, for vacuum manufacturing process, when welding, is stayed
Under weld seam be to most easily produce one of region of leakage, it is therefore desirable to great care.
For the technique for welding of above-mentioned low-temperature superconducting nuclear magnetic resonance vacuum tank, common weld appearance defect and
Other defects, such as incomplete fusion, lack of penetration, slag inclusion, stomata, crackle and internal stress can all become the leak hole in ultra-high vacuum system
Or the hidden danger in false leak source.In view of low-temperature superconducting nuclear magnetic resonance vacuum tank for the rigors of weld seam leakproofness, in order to
Weld defect is reduced to the full extent, and weld seam must be welded once, cause idle space when to avoid secondary welding.In addition, by
In the stress and strain that the reasons such as pressure difference, vibration and thermal cycle generate in connector, may make to generate containing poor weld
Crackle to keep weld seam impaired, or due in use process weld seam corroded, also result in leak source and formed.
In conclusion a kind of welding procedure for being directed to this kind of large scale equipment support end cover board how is proposed, so that processing
The leak rate of weld seam can satisfy harsh technical requirements on finished product, also just become that those skilled in that art are urgently to be resolved to be asked
Topic.
Summary of the invention
In view of the prior art, there are drawbacks described above, and the purpose of the present invention is to propose to a kind of welderings of large scale equipment support end cover board
Connect technique, which comprises the steps of:
It polishes before S1, weldering step, checks welding equipment and positioner, cover board to be welded and cover board flange component are carried out
Polishing；
Cover board and cover board flange component are combined by S2, pre-welding step, and carry out pre-welding to binding site；
S3, welding step, by after pre-welding cover board and cover board flange component be fixedly installed on positioner, by the weldering
It connects and is adjusted on positioner to welding post, welding processing then is carried out to the cover board and cover board flange component；
S4, detecting step will terminate to weld and complete cooling cover board finished product to remove from positioner, and to cover board finished product
It is detected.
Preferably, it polishes in polishing step cover board to be welded and cover board flange component before the S1 is welded
The region 20mm around place to be welded and place to be welded of the range for cover board and on cover board flange component.
Preferably, the S2 pre-welding step, specifically includes: cover board and cover board flange component are subjected to gapless combination,
To welding at binding site, in welding process, welding current is 210A ~ 230A, and weldingvoltage is 11V ~ 15V, and welding bead is long
Degree is 10mm ~ 25mm, and spacing is 100mm ~ 250mm.
Preferably, welding manner used in the S2 pre-welding step is TIG positioning welding.
Preferably, welding wire specification used in the S2 pre-welding step is AWS A5.9, ER309L, Ф 2.0.
Preferably, the S3 welding step, specifically includes:
S31, by after pre-welding cover board and cover board flange component be fixedly installed on positioner；
S32, the positioner is adjusted to downhand position, and the prime coat of weld seam is welded, in welding process, weldering
Connecing electric current is 210A ~ 230A, and weldingvoltage is 10V ~ 13V；
After the completion of S33, prime coat welding, interlayer cleaning is carried out to welding position and interlayer temperature controls；
S34, the positioner is adjusted to downhand position, and the capping layer of weld seam is welded, in welding process, weldering
Connecing electric current is 210A ~ 230A, and weldingvoltage is 12V ~ 15V, and straight polarity direct current, throughput is 10 L/min ~ 15L/min.
Preferably, welding manner used in S32 and S34 is that TIG waves weldering.
Preferably, welding wire specification used in S32 is AWS A5.9, ER309L, Ф 2.0, welding wire used in S34
Specification is AWS A5.9, ER309L, Ф 2.4.
Preferably, the cleaning of interlayer described in S33 and interlayer temperature control, specifically include: using the butt welding of stainless steel wire brush
It connects position to be cleared up, interlayer temperature is less than 180 DEG C.
Preferably, in the S4 detecting step, detection project includes weld appearance detection and face of weld Liquid penetrant testing.
Compared with prior art, advantages of the present invention is mainly reflected in the following aspects:
Welding procedure quality of the invention is stablized, and root is fused, can control weld heat input well.And welding of the invention
During welding, the residence time in weld seam high-temperature region is shorter for technique, heat input is reduced, so as to avoid the production of fire check
The formation of carbide, the rotproofness for effectively preventing intercrystalline corrosion, improving material caused by the overheat burning of raw and weld seam
And mechanical performance.Weld seam after forming has good compactness, and shaping surface beauty greatly improves weldering without open defect
Stitch the qualification rate of helium mass spectrum leak detection.
In addition, the present invention also provides reference for other relevant issues in same domain, can be opened up on this basis
Extension is stretched, and is applied in the technical solution of other welding procedures same domain Nei, has very wide application prospect.
In general, the welding procedure of a kind of large scale equipment support end cover board proposed by the invention, using effect is excellent,
With very high use and promotional value.
Just the embodiment of the present invention is described in further detail below, so that technical solution of the present invention is easier to manage
Solution is grasped.
Specific embodiment
The invention proposes a kind of welding procedures of large scale equipment support end cover board, include the following steps:
It polishes before S1, weldering step, checks welding equipment and positioner, cover board to be welded and cover board flange component are carried out
Polishing.It is to be welded on cover board and cover board flange component to the range that cover board to be welded and cover board flange component are polished
The region 20mm around place and place to be welded.
Cover board and cover board flange component are combined by S2, pre-welding step, and carry out pre-welding to binding site.
Specific operating procedure are as follows: cover board and cover board flange component are subjected to gapless combination, carried out at binding site
It welds, in welding process, welding current is 210A ~ 230A, and weldingvoltage is 11V ~ 15V, and welding bead length is 10mm ~ 25mm,
Away from for 100mm ~ 250mm.
It is further to note that welding manner as used herein is TIG positioning welding.Used in welding process
Welding wire specification is AWS A5.9, ER309L, Ф 2.0.
S3, welding step, by after pre-welding cover board and cover board flange component be fixedly installed on positioner, by institute
It states and is adjusted on positioner to welding post, welding processing then is carried out to the cover board and cover board flange component.It is specific and
Speech includes the following steps:
S31, by after pre-welding cover board and cover board flange component be fixedly installed on positioner.
S32, the positioner is adjusted to downhand position, and the prime coat of weld seam is welded, welding process
In, welding current is 210A ~ 230A, and weldingvoltage is 10V ~ 13V.
S33, prime coat welding after the completion of, using stainless steel wire brush carry out interlayer cleaning, interlayer temperature less than 180 DEG C,
And it waves tungsten needle and must not touch base material.
S34, the positioner is adjusted to downhand position, and the capping layer of weld seam is welded, welding process
In, welding current is 210A ~ 230A, and weldingvoltage is 12V ~ 15V, and straight polarity direct current, throughput is 10 L/min ~ 15L/min.
The capping layer has air-tightness requirement, pays particular attention in welding.
You need to add is that welding manner used in S32 and S34 is that TIG waves weldering.Welding wire used in S32
Specification is AWS A5.9, ER309L, Ф 2.0, and welding wire specification used in S34 is AWS A5.9, ER309L, Ф 2.4.
The advantages of waving weldering is that continuous silk is steady and fast, uninterruptedly, uniform to swing the guard circle for increasing Ar, is preferably guaranteed
The quality of weld seam.Especially in the welding process of stainless steel and nonferrous materials, molten bath is uniform, gas shield is proper,
Weld appearance is more beautiful.
When welding, welding gun porcelain mouth is gently close to the groove side that (plays a supportive role) and stopped and the electric arc that ignites is formed by operator
Molten bath, by thumb and index finger friction wire feed, with the swing in porcelain mouth (direction migrated towards heat source and Ar air-flow protection).It is molten
Drop is connected under tractive force and surface tension effects from the groove other side with the side base material, and molten drops and other side base material is waited to be formed surely
It is waved again after fixed molten bath, weld seam and returns to the original side of base material, repeatedly, the weld seam two sides fusion of formation is good, is not easy to produce
Raw undercut and lack of penetration, incomplete fusion are detached from the guard circle of Ar since welding wire never has, thus inside weld seam, surface quality can
It accesses and is effectively ensured.In addition, in the present embodiment, in order to guarantee welding effect, there is also certain angles in welding process
It is required that specifically, operator should ensure that the angle between filler wire and welding direction remain at 150 ° ~ 160 ° it
Between, the angle between welding gun gun body and welding direction remains between 60 ° ~ 70 °, and welding gun porcelain mouth is before welding on direction
It waves 30 ° ~ 40 ° of left and right.
S4, detecting step will terminate to weld and complete cooling cover board finished product to remove from positioner, and to cover board
Finished product is detected.Detection project includes weld appearance detection and face of weld Liquid penetrant testing.
The present invention selects TIG to wave weldering, and appearance of weld is beautiful, the general golden yellow of scalelike mark rule, through appearance and Liquid penetrant testing
Afterwards, do not occur the defects of incomplete fusion, lack of penetration, slag inclusion, stomata, crackle, weld seam first-time qualification rate and 95% or more, weld seam helium matter
Spectrum leak detection qualification rate 100%.Procedure qualification preparation, macroscopical and microcosmic metallographic fusion have been carried out to the welding procedure before welding product
Well, fire check and intercrystalline corrosion are not found, and are formd welding procedure qualification report and welded and train welder to instruct.
In general, welding procedure quality of the invention is stablized, and root is fused, can control weld heat input well.
And welding procedure of the invention is during welding, the residence time in weld seam high-temperature region is shorter, heat input is reduced, to keep away
The generation and weld seam of having exempted from fire check overheat the formation of carbide caused by burning, effectively prevent intercrystalline corrosion, improve
The rotproofness and mechanical performance of material.Weld seam after forming has good compactness, shaping surface beauty without open defect,
Greatly improve the qualification rate of weld seam helium mass spectrum leak detection.In addition, the present invention also provides for other relevant issues in same domain
Reference, can carry out expansion extension on this basis, apply in the technical solution of other welding procedures same domain Nei, have
Very wide application prospect.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit and essential characteristics of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (10)
1. a kind of welding procedure of large scale equipment support end cover board, which comprises the steps of:
It polishes before S1, weldering step, checks welding equipment and positioner, cover board to be welded and cover board flange component are carried out
Polishing；
Cover board and cover board flange component are combined by S2, pre-welding step, and carry out pre-welding to binding site；
S3, welding step, by after pre-welding cover board and cover board flange component be fixedly installed on positioner, by the weldering
It connects and is adjusted on positioner to welding post, welding processing then is carried out to the cover board and cover board flange component；
S4, detecting step will terminate to weld and complete cooling cover board finished product to remove from positioner, and to cover board finished product
It is detected.
2. the welding procedure of large scale equipment support end cover board according to claim 1, it is characterised in that: before S1 weldering
It is on cover board and cover board flange component to the range that cover board to be welded and cover board flange component are polished in step of polishing
The region 20mm around place to be welded and place to be welded.
3. the welding procedure of large scale equipment support end cover board according to claim 1, which is characterized in that the S2 pre-welding
Step specifically includes: cover board and cover board flange component being carried out gapless combination and welded to welding at binding site
Cheng Zhong, welding current be 210A ~ 230A, weldingvoltage be 11V ~ 15V, welding bead length be 10mm ~ 25mm, spacing be 100mm ~
250mm。
4. the welding procedure of large scale equipment support end cover board according to claim 3, it is characterised in that: the S2 pre-welding
Welding manner used in step is TIG positioning welding.
5. the welding procedure of large scale equipment support end cover board according to claim 3, it is characterised in that: the S2 pre-welding
Welding wire specification used in step is AWS A5.9, ER309L, Ф 2.0.
6. the welding procedure of large scale equipment support end cover board according to claim 1, which is characterized in that the S3 welding step
Suddenly, it specifically includes:
S31, by after pre-welding cover board and cover board flange component be fixedly installed on positioner；
S32, the positioner is adjusted to downhand position, and the prime coat of weld seam is welded, in welding process, weldering
Connecing electric current is 210A ~ 230A, and weldingvoltage is 10V ~ 13V；
After the completion of S33, prime coat welding, interlayer cleaning is carried out to welding position and interlayer temperature controls；
S34, the positioner is adjusted to downhand position, and the capping layer of weld seam is welded, in welding process, weldering
Connecing electric current is 210A ~ 230A, and weldingvoltage is 12V ~ 15V, and straight polarity direct current, throughput is 10 L/min ~ 15L/min.
7. the welding procedure of large scale equipment support end cover board according to claim 6, it is characterised in that: institute in S32 and S34
The welding manner used is that TIG waves weldering.
8. the welding procedure of large scale equipment support end cover board according to claim 6, it is characterised in that: used in S32
Welding wire specification be AWS A5.9, ER309L, Ф 2.0, welding wire specification used in S34 is AWS A5.9, ER309L, Ф
2.4。
9. the welding procedure of large scale equipment support end cover board according to claim 6, which is characterized in that layer described in S33
Between clear up and interlayer temperature control, specifically include: welding position being cleared up using stainless steel wire brush, interlayer temperature is less than
180℃。
10. the welding procedure of large scale equipment support end cover board according to claim 1, it is characterised in that: the S4 detection
In step, detection project includes weld appearance detection and face of weld Liquid penetrant testing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811249155.3A CN109434254B (en) | 2018-10-25 | 2018-10-25 | Welding process for large-scale equipment supporting end cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811249155.3A CN109434254B (en) | 2018-10-25 | 2018-10-25 | Welding process for large-scale equipment supporting end cover plate |
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| Publication Number | Publication Date |
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| CN109434254A true CN109434254A (en) | 2019-03-08 |
| CN109434254B CN109434254B (en) | 2021-05-11 |
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| CN201811249155.3A Active CN109434254B (en) | 2018-10-25 | 2018-10-25 | Welding process for large-scale equipment supporting end cover plate |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010027582A (en) * | 2008-07-24 | 2010-02-04 | Chofu Seisakusho Co Ltd | Manufacturing method of reformer for fuel cell |
| CN104972208A (en) * | 2015-06-30 | 2015-10-14 | 柳州金茂机械有限公司 | Process for argon-arc welding of steel plate |
| CN105014205A (en) * | 2015-07-17 | 2015-11-04 | 江西洪都航空工业集团有限责任公司 | Corner butt joint TIG welding method |
| CN106695063A (en) * | 2016-12-29 | 2017-05-24 | 上海沪临重工有限公司 | Automatic welding technological method of rack of marine diesel engine |
| CN107030359A (en) * | 2017-06-01 | 2017-08-11 | 中国石油大学(华东) | Bimetallic mechanical is combined tube end resistance spot welding process |
| CN107309565A (en) * | 2017-07-07 | 2017-11-03 | 天津航天长征火箭制造有限公司 | A kind of whole bottom state abutted flange disk lean and correct assembly welding method of Ф 3350mm ellipsoid bottoms |
-
2018
- 2018-10-25 CN CN201811249155.3A patent/CN109434254B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010027582A (en) * | 2008-07-24 | 2010-02-04 | Chofu Seisakusho Co Ltd | Manufacturing method of reformer for fuel cell |
| CN104972208A (en) * | 2015-06-30 | 2015-10-14 | 柳州金茂机械有限公司 | Process for argon-arc welding of steel plate |
| CN105014205A (en) * | 2015-07-17 | 2015-11-04 | 江西洪都航空工业集团有限责任公司 | Corner butt joint TIG welding method |
| CN106695063A (en) * | 2016-12-29 | 2017-05-24 | 上海沪临重工有限公司 | Automatic welding technological method of rack of marine diesel engine |
| CN107030359A (en) * | 2017-06-01 | 2017-08-11 | 中国石油大学(华东) | Bimetallic mechanical is combined tube end resistance spot welding process |
| CN107309565A (en) * | 2017-07-07 | 2017-11-03 | 天津航天长征火箭制造有限公司 | A kind of whole bottom state abutted flange disk lean and correct assembly welding method of Ф 3350mm ellipsoid bottoms |
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| CN109434254B (en) | 2021-05-11 |
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