CN105537851B - A kind of automatic welding line restorative procedure of narrow gap and system - Google Patents
A kind of automatic welding line restorative procedure of narrow gap and system Download PDFInfo
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- CN105537851B CN105537851B CN201610115544.1A CN201610115544A CN105537851B CN 105537851 B CN105537851 B CN 105537851B CN 201610115544 A CN201610115544 A CN 201610115544A CN 105537851 B CN105537851 B CN 105537851B
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Abstract
The invention discloses a kind of automatic welding line restorative procedure of narrow gap of large-scale pipeline and system, and in order to precisely remove weld defect, groove can be machined out, and can ensure the technical problem of welding quality reprocessed, and the method comprising the steps of：S1, defect location is carried out to pipe welding seam, and using the anchor point set before welding on pipeline, weld defect is identified on pipe entity；S2, the result based on defect location, carry out defect of pipeline and original weld heat-affected zone is excavated；S3, after excavating defect, pipe welding seam groove is processed；S4, after the completion of retaining wall on slope, to pipe welding seam carry out repair welding.Reprocessed suitable for the narrow gap automatic welding weld defect of the nuclear power station such as large posted sides pipeline such as main pipeline, Surge line piping.
Description
Technical field
Narrow gap automatic welding is used to large-scale pipeline in the engineering fields such as nuclear power, water power, thermoelectricity the present invention relates to one kind
The restorative procedure of the weld defect of formation and the system using this method.
Background technology
At present, the large-scale pipeline in the engineering field such as nuclear power, water power, thermoelectricity usually uses narrow gap automatic welding novel welding
Main pipeline, Surge line piping, core level large posted sides pipeline in technology, such as nuclear power station.Because narrow gap automatic welding technique is present inherently
Particularity, during welding such as parameter selection is unreasonable or control is improper, and incomplete fusion is produced along automatic welding track easily at groove
Weld defect, as shown in figure 1, in figure, 1 is the welding center of circle, and 2 be tungsten electrode, and 3 be wire-feeding pipe, and 4 be automatic welder track, and 5 be pipeline
Inner side, 6 be welding bead, and 7 be that 8 be defect (not merging) on the outside of pipeline.In Nuclear Power Station, narrow gap welding connection technology is answered
It is less to the application example of narrow gap welding technology with being still in the starting stage.At present, this kind of reprocessing for weld defect is used more
Excavate by hand, the method that manual welding is reprocessed, this method existing defects can not be removed precisely, repair welding needs groove to use machine
The defects of processing and easily generation secondary defect.
The content of the invention
Technology is reprocessed using automatic welding it is an object of the invention to provide a kind of narrow gap welding defect.The technology can be accurate
Weld defect is removed, groove can be machined out, and can ensure the welding quality reprocessed.
In order to achieve the above object, it is automatic to provide a kind of narrow gap of large-scale pipeline for a technical scheme of the invention
Welding line restorative procedure, it is characterised in that its step includes：
S1, defect location is carried out to pipe welding seam, and using the preceding setting of welding on pipeline for finding out the specific position of weld seam
The anchor point put, weld defect is identified on pipe entity；
S2, the result based on defect location, progress defect of pipeline and original weld heat-affected zone are excavated；
After S3, defect of pipeline are excavated, pipe welding seam groove is processed；
S4, retaining wall on slope processing after the completion of, to pipe welding seam carry out repair welding.
Preferably, the step S2 is to utilize retaining wall on slope equipment, and defect of pipeline and original weld seam are carried out by cutoff tool
Excavate heat affected area.
Preferably, the thickness of every layer of pipe welding seam is A~Bmm, then the step S2 is specifically included：
S2.1, process equipment installation beveling machine head, adjust and fixed, make the excision track center of circle and track center of circle during welding
Produce certain deviation；
S2.2, cutting knife is installed and connects beveling machine hydraulic station, rotating speed is adjusted to check machine operation at a slow speed；
S2.3, installation cutoff tool and centering, during centering cutoff tool center with fixed to reprocess axis of a weld completely heavy
Close, trial operation adjusts deviation to meeting the requirements；
Cut at a slow speed when S2.4, defect are excavated and the depth of cut is less than or equal to Amm, cooled down in whole process using coolant
Cutter, fathom in cutting process, after depth of cut exceedes the minimum value for determining depth of defect, often processing is less than or equal to
VT, a PT need to be carried out during Amm to finished surface to examine, the maximum of depth of defect is determined until being cut to, then stops excision；
S2.5, when cut off weld penetration reach determination the defects of depth maximum after, to remaining weld seam carry out RT detections,
It is clean to confirm that weld defect removes.
Preferably, in the step S2.1, the deviation in the track center of circle is 2-5mm when cutting off the track center of circle and welding.
Preferably, the step S3 carries out narrow gap weld seam using 5 degree of divided edge molding knives and reprocesses retaining wall on slope.
Preferably, the step S3 is specifically included：
S3.1, cutoff tool is removed, cleared of debris, the processing that 5 degree of forming cutters carry out the unilateral 5 degree of inclined-planes of groove is installed；Treat list
After skew back face machines, current 5 degree of forming cutters are removed, are installed another 5 degree of forming cutters progress opposite side oblique surface machinings；
S3.2, treat that both sides inclined-plane all machines, the coolant and chip remained in pipe surface and weld seam is carried out
Cleaning, ensures the cleaning of weld seam；
S3.3, beveling machine is removed, the polishing of weld groove is carried out using angular electric polishing machine.
Preferably, the repair welding of the step S4 enables tungsten electrode to be inclined to groove side, and can change welding bead by bending tungsten electrode
Arrangement.
Preferably, the step S4 is specifically included：
S4.1, take the rows of every layer of twice after preset value required by groove width exceedes narrow gap automatic soldering technique
Road mode, with groove broaden subsequent passes arrangement quantity gradually increase；
When S4.2, repair welding, using curved tungsten electrode, first of weld seam can fuse groove both sides completely when being reprocessed with guarantee；
S4.3, per pass postwelding are concave, and carry out VT inspections to welding bead, are ensured good with sidewall fusion；Per pass postwelding
Use stainless steel brushing tungsten electrode and welding bead oxide on surface.
Preferably, positioned the defects of the step S1, or use channel ultrasonic instrument, or entered using conventional UT methods
OK.
Another technical scheme of the present invention there is provided a kind of automatic welding line reparation system of narrow gap of large-scale pipeline
System, the repair system include：
Weld and HAZ module, for carrying out defect location to the automatic welding line of the narrow gap, and using being welded on pipeline
The anchor point for being used to find out weld seam particular location of preceding setting, is identified to weld defect on pipe entity；
Weld defect excavates module, for the result based on defect location, carries out defect of pipeline and original weld seam heat affecting
Area excavates；
Weld groove processing module, for after defect of pipeline is excavated, being processed to pipe welding seam groove；
Weld seam repair welding module, after the completion of being handled in retaining wall on slope, repair welding is carried out to pipe welding seam.
Preferably, it is to utilize retaining wall on slope equipment that the defect, which excavates module, and defect of pipeline and original are carried out by cutoff tool
There is excavating for weld heat-affected zone.
Preferably, the thickness of every layer of pipe welding seam is A~Bmm, then the defect is excavated module and specifically included：
Process equipment installation process unit, beveling machine head is installed for process equipment, adjusts and fixed, make excision track
The track center of circle produces certain deviation when the center of circle and welding；
Process equipment checks processing unit, and for installing cutting knife and connecting beveling machine hydraulic station, rotating speed is adjusted at a slow speed
Check machine operation；
Process equipment trial operation processing unit, for installing cutoff tool and centering, cutoff tool center is with having determined that during centering
Axis of a weld of reprocessing be completely superposed, trial operation adjusts deviation to meeting the requirements；
Process equipment cutting process unit, for cut at a slow speed when defect is excavated and the depth of cut be less than or equal to Amm,
Cutter is cooled down using coolant in whole process, is fathomed in cutting process, depth of defect is determined when depth of cut exceedes
VT, a PT need to be carried out to finished surface after minimum value, when often processing is less than or equal to Amm to examine, until being cut to determination defect
The maximum of depth, then stop excision；
Process equipment detection process unit, for when cut off weld penetration reach determination the defects of depth maximum after, it is right
Remaining weld seam carries out RT detections, and it is clean to confirm that weld defect removes.
Preferably, the deviation in the track center of circle is 2-5mm when cutting off the track center of circle and welding.
Preferably, the retaining wall on slope module carries out narrow gap weld seam using 5 degree of divided edge molding knives and reprocesses retaining wall on slope.
Preferably, the weld groove processing module specifically includes：
Forming cutter installs working process unit, for removing cutoff tool, cleared of debris, installs 5 degree of forming cutters and carries out groove
The processing on unilateral 5 degree of inclined-planes；After the completion for the treatment of unilateral oblique surface machining, current 5 degree of forming cutters are removed, are installed another 5 degree of forming cutters
Carry out opposite side oblique surface machining；
Weld seam cleaning treatment unit, treat that both sides inclined-plane all machines, the cooling to being remained in pipe surface and weld seam
Liquid and chip are cleared up, and ensure the cleaning of weld seam；
Weld groove grinding process unit, for removing beveling machine, weld groove is carried out using angular electric polishing machine
Polishing.
Preferably, the repair welding of the defect repair welding module enables tungsten electrode to be inclined to groove side, and can change by bending tungsten electrode
Become welding bead arrangement.
Preferably, the weld seam repair welding module specifically includes：
Welding bead arrange processing unit, for when groove width exceed narrow gap automatic soldering technique required by preset value after
Take the row road mode of every layer of twice, with groove broaden subsequent passes arrangement quantity gradually increase；
Weld seam repair welding processing unit, during for repair welding, using curved tungsten electrode, first of weld seam can be by slope during ensureing to reprocess
Mouth both sides fuse completely；
Weld seam detection with cleaning processing unit, be concave for per pass postwelding, and to welding bead carry out VT inspections, ensure and
Sidewall fusion is good；Per pass postwelding uses stainless steel brushing tungsten electrode and welding bead oxide on surface.
Preferably, positioned the defects of the defect location module, or use channel ultrasonic instrument, or use conventional UT side
Method is carried out.
The present invention carries out defect by using machinery and excavates method, can accurately remove weld defect, and improves defect digging
The efficiency removed, and the groove type needed for narrow gap welding technology can be processed, reprocess quality in favor of weld seam.The method
The duration is not only saved, reduces construction cost, the more favourable welding quality that ensure that repair welding.
Brief description of the drawings
Fig. 1 is that weld defect produces schematic diagram；
Fig. 2 is that weld defect positions schematic diagram, and in figure, 9 be weld seam, and 10 be anchor point；
Fig. 3 is that defect excavates schematic diagram, and in figure, 11 be the excision center of circle, and 12 be rail cutting machine；
Fig. 4 is that weld defect excavates cutters layout schematic diagram, and in figure, 13 be cutter one, and 14 be cutter head one, and 15 be track
One, 16 be cutter two, and 17 be cutter head two, and 18 be track two；
Fig. 5 is finished edge schematic diagram, and in figure, 19 be pipeline；
Fig. 6 is the automatic welding line restorative procedure flow chart of narrow gap.
Embodiment
To become apparent the present invention, hereby with preferred embodiment, and the detailed description of attached related data is as follows.
Embodiment one
With reference to figure 6, the embodiments of the invention provide a kind of automatic welding line restorative procedure of narrow gap of large-scale pipeline, its
Step is：
S1, defect location is carried out to pipe welding seam, and using the anchor point set before welding on pipeline, weld defect is existed
It is identified on pipe entity；
Anchor point：Weld seam welding terminate after, it is necessary to face of weld is polishing to it is smooth as mother metal, such weld seam more need
Inservice inspection is carried out, after weld grinding is smooth, is the position that can accurately find weld seam, before welding, is beaten on pipeline
One small rut is anchor point, records out anchor point after the distance of weld seam, after weld grinding, passes through Distance positioning point
Distance, can accurately find out the particular location of weld seam；
S2, the result based on defect location, progress defect of pipeline and original weld heat-affected zone are excavated；
After S3, defect of pipeline are excavated, pipe welding seam groove is processed；
S4, retaining wall on slope processing after the completion of, to pipe welding seam carry out repair welding.
It can be seen that above-mentioned steps S1 is defect location step, above-mentioned steps S2 is that defect excavates step, and above-mentioned steps S3 is slope
Mouth procedure of processing, above-mentioned steps S4 is weld seam repair welding step.
In specific implementation process, the step S2 is to utilize retaining wall on slope equipment, and defect of pipeline is carried out by cutoff tool
And original weld heat-affected zone is excavated.
In specific implementation process, the step S3 reprocesses groove using 5 degree of divided edge molding knives progress narrow gap weld seams and added
Work.
In specific implementation process, the repair welding of the step S4 enables tungsten electrode to be inclined to groove side by bending tungsten electrode, and
Welding bead arrangement can be changed.
Positioned in specific implementation process, the defects of the step S1, channel ultrasonic instrument can be used, it is also possible to be conventional
UT methods are carried out.The equipment list mainly used in defect location see the table below：
In specific implementation process, the step S2 is specifically included：
1) process equipment installation beveling machine head, adjust and fixed, the excision track center of circle is produced with track center of circle during welding
Raw certain deviation；
2) cutting knife is installed and connects beveling machine hydraulic station, rotating speed is adjusted to check machine operation at a slow speed；
3) cutoff tool and centering be installed, cutoff tool center is completely superposed with fixed axis of a weld of reprocessing during centering,
Trial operation adjusts deviation to meeting the requirements；
4) cut at a slow speed when defect is excavated and the depth of cut is less than or equal to the first preset value, coolant is used in whole process
Cutter is cooled down, is fathomed in cutting process, after depth of cut exceedes the minimum value for determining depth of defect, often processing is less than etc.
VT, a PT need to be carried out to finished surface when the second preset value to examine, the maximum of depth of defect is determined until being cut to, then
Stop excision.
Every layer of throat depth is about 1-2mm in welding process, as long as the first preset value is no more than 1mm, in this reality
Apply in example, the first default settings are 0.25mm.Using 0.25mm the depth of cut the purpose of be that a hilt lacks during preventing from excavating
Fall into this to remove and defect can not be detected by VT, PT, so caused result is can only to continue down to dig, without can know that
Whether defect is removed.
The thickness of every layer of weld seam is that every layer of throat depth is about 1-2mm in welding process in welding process, so often going
, it is necessary to be detected during except one less than one layer of weld seam, to find defect in time, therefore the second default settings be no more than
1mm。
5) after the defects of weld penetration reaches determination depth maximum is cut off, RT detections is carried out to remaining weld seam, confirmed
Weld defect removes clean.
In specific implementation process, the deviation in the track center of circle is the 3rd preset value when cutting off the track center of circle and welding.It is excessive
Will cause defect remove after, it is whole circle pipe groove depth it is inconsistent, be unfavorable for last pipe surface weld seam continuous repair welding its,
It is in the present embodiment 2-5mm by the 3rd default settings.
In specific implementation process, the step S3 is specifically included：
Cutoff tool is removed, cleared of debris, the processing that 5 degree of forming cutters carry out the unilateral 5 degree of inclined-planes of groove is installed；Treat unilateral inclined-plane
After machining, current 5 degree of forming cutters are removed, are installed another 5 degree of forming cutters progress opposite side oblique surface machinings；
Treat that both sides inclined-plane all machines, the coolant and chip remained in pipe surface and weld seam cleared up,
Ensure the cleaning of weld seam；
Beveling machine is removed, the polishing of weld groove is carried out using angular electric polishing machine.
In specific implementation process, the step S4 is specifically included：
The row road mode of every layer of twice is taken after groove width is more than four preset values, as groove broadens subsequent passes
Arrangement quantity gradually increases；Wherein, the 4th preset value is 8mm, to meet narrow gap automatic soldering technique requirement.
During repair welding, using curved tungsten electrode, first of weld seam can fuse groove both sides completely when being reprocessed with guarantee；
Per pass postwelding is concave, and carries out VT inspections to welding bead, is ensured good with sidewall fusion；Per pass postwelding is not using
Become rusty steel brushing tungsten electrode and welding bead oxide on surface.
Embodiment two
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of automatic welding line of the narrow gap of large-scale pipeline
Repair system, the repair system include：
Weld and HAZ module, for carrying out defect location to the automatic welding line of the narrow gap, and using being welded on pipeline
The anchor point of preceding setting, weld defect is identified on pipe entity；
Weld defect excavates module, for the result based on defect location, carries out defect of pipeline and original weld seam heat affecting
Area excavates；
Weld groove processing module, for after defect of pipeline is excavated, being processed to pipe welding seam groove；
Weld seam repair welding module, after the completion of being handled in retaining wall on slope, repair welding is carried out to pipe welding seam.
In specific implementation process, it is to utilize retaining wall on slope equipment that the defect, which excavates module, and pipe is carried out by cutoff tool
Road defect and original weld heat-affected zone are excavated.
In specific implementation process, the retaining wall on slope module carries out narrow gap weld seam using 5 degree of divided edge molding knives and reprocessed
Retaining wall on slope.
In specific implementation process, the repair welding of the defect repair welding module enables tungsten electrode to be inclined to slope by bending tungsten electrode
Mouth side, and welding bead arrangement can be changed.
Positioned in specific implementation process, the defects of the defect location module, channel ultrasonic instrument can be used, also may be used
Carried out with conventional UT methods.
In specific implementation process, the defect is excavated module and specifically included：
Process equipment installation process unit, beveling machine head is installed for process equipment, adjusts and fixed, make excision track
The track center of circle produces certain deviation when the center of circle and welding；
Process equipment checks processing unit, and for installing cutting knife and connecting beveling machine hydraulic station, rotating speed is adjusted at a slow speed
Check machine operation；
Process equipment trial operation processing unit, for installing cutoff tool and centering, cutoff tool center is with having determined that during centering
Axis of a weld of reprocessing be completely superposed, trial operation adjusts deviation to meeting the requirements；
Process equipment cutting process unit, for being cut at a slow speed when defect is excavated and the depth of cut is pre- less than or equal to first
If value, cutter is cooled down using coolant in whole process, is fathomed in cutting process, determine that defect is deep when depth of cut exceedes
VT, a PT need to be carried out to finished surface after the minimum value of degree, when often processing is less than or equal to the second preset value to examine, until cutting
To the maximum for determining depth of defect, then stop excision；Wherein, the setting reference implementation example of the first preset value and the second preset value
1。
Process equipment detection process unit, for when cut off weld penetration reach determination the defects of depth maximum after, it is right
Remaining weld seam carries out RT detections, and it is clean to confirm that weld defect removes.
In specific implementation process, the deviation in the track center of circle is the 3rd preset value when cutting off the track center of circle and welding；Wherein,
The setting reference implementation example 1 of 3rd preset value.
In specific implementation process, the weld groove processing module specifically includes：
Forming cutter installs working process unit, for removing cutoff tool, cleared of debris, installs 5 degree of forming cutters and carries out groove
The processing on unilateral 5 degree of inclined-planes；After the completion for the treatment of unilateral oblique surface machining, current 5 degree of forming cutters are removed, are installed another 5 degree of forming cutters
Carry out opposite side oblique surface machining；
Weld seam cleaning treatment unit, treat that both sides inclined-plane all machines, the cooling to being remained in pipe surface and weld seam
Liquid and chip are cleared up, and ensure the cleaning of weld seam；
Weld groove grinding process unit, for removing beveling machine, weld groove is carried out using angular electric polishing machine
Polishing.
In specific implementation process, the weld seam repair welding module specifically includes：
Welding bead arrangement processing unit, for taking the row road side of every layer of twice after groove width is more than four preset values
Formula, with groove broaden subsequent passes arrangement quantity gradually increase；Wherein, the setting reference implementation example 1 of the 4th preset value.
Weld seam repair welding processing unit, during for repair welding, using curved tungsten electrode, first of weld seam can be by slope during ensureing to reprocess
Mouth both sides fuse completely；
Weld seam detection with cleaning processing unit, be concave for per pass postwelding, and to welding bead carry out VT inspections, ensure and
Sidewall fusion is good；Per pass postwelding uses stainless steel brushing tungsten electrode and welding bead oxide on surface.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more
The computer program production that usable storage medium is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, this area just seem personnel can to the present invention carry out it is various change and modification without departing from the present invention
Spirit and scope.So, if these modifications and variations of the present invention belong to the model of the claims in the present invention and its equivalent technologies
Within enclosing, then the present invention is also intended to comprising including these changes and modification.
Claims (14)
1. a kind of automatic welding line restorative procedure of the narrow gap of large-scale pipeline, it is characterised in that its step includes：
S1, defect location is carried out to pipe welding seam, and using the preceding setting of welding on pipeline for finding out weld seam particular location
Anchor point, weld defect is identified on pipe entity；
S2, the result based on defect location, progress defect of pipeline and original weld heat-affected zone are excavated；The step S2 is profit
With retaining wall on slope equipment, excavating for defect of pipeline and original weld heat-affected zone, every layer of pipeline weldering are carried out by cutoff tool
The thickness of seam is A~Bmm, and the step S2 is specifically included：
S2.1, process equipment installation beveling machine head, adjust and fixed, the excision track center of circle is produced with track center of circle during welding
Certain deviation；
S2.2, cutting knife is installed and connects beveling machine hydraulic station, rotating speed is adjusted to check machine operation at a slow speed；
S2.3, installation cutoff tool and centering, cutoff tool center is completely superposed with fixed axis of a weld of reprocessing during centering, examination
Combustion adjustment deviation is to meeting the requirements；
Cut at a slow speed when S2.4, defect are excavated and the depth of cut is less than or equal to Amm, coolant cooling knife is used in whole process
Have, fathomed in cutting process, after depth of cut exceedes the minimum value for determining depth of defect, often processing is less than or equal to Amm
When need to carry out VT, a PT to finished surface and examine, the maximum of depth of defect is determined until being cut to, then stops excision；
S2.5, when cut off weld penetration reach determination the defects of depth maximum after, to remaining weld seam carry out RT detections, confirm weldering
Seam defect removes clean；
After S3, defect of pipeline are excavated, pipe welding seam groove is processed；
S4, retaining wall on slope processing after the completion of, to pipe welding seam carry out repair welding.
2. the automatic welding line restorative procedure of the narrow gap of large-scale pipeline as claimed in claim 1, it is characterised in that：Described
In step S2.1, the deviation in the track center of circle is 2-5mm when cutting off the track center of circle and welding.
3. the automatic welding line restorative procedure of the narrow gap of large-scale pipeline as claimed in claim 1, it is characterised in that：The step
Rapid S3 carries out narrow gap weld seam using 5 degree of divided edge molding knives and reprocesses retaining wall on slope.
4. the automatic welding line restorative procedure of the narrow gap of large-scale pipeline as claimed in claim 3, it is characterised in that：The step
Rapid S3 is specifically included：
S3.1, cutoff tool is removed, cleared of debris, the processing that 5 degree of forming cutters carry out the unilateral 5 degree of inclined-planes of groove is installed；Treat unilateral oblique
After face machines, current 5 degree of forming cutters are removed, are installed another 5 degree of forming cutters progress opposite side oblique surface machinings；
S3.2, treat that both sides inclined-plane all machines, the coolant and chip remained in pipe surface and weld seam cleared up,
Ensure the cleaning of weld seam；
S3.3, beveling machine is removed, the polishing of weld groove is carried out using angular electric polishing machine.
5. the automatic welding line restorative procedure of the narrow gap of large-scale pipeline as claimed in claim 1, it is characterised in that：The step
Rapid S4 repair welding enables tungsten electrode to be inclined to groove side, and can change welding bead arrangement by bending tungsten electrode.
6. the automatic welding line restorative procedure of the narrow gap of large-scale pipeline as claimed in claim 5, it is characterised in that：The step
Rapid S4 is specifically included：
S4.1, take the row road sides of every layer of twice after preset value required by groove width exceedes narrow gap automatic soldering technique
Formula, with groove broaden subsequent passes arrangement quantity gradually increase；
When S4.2, repair welding, using curved tungsten electrode, first of weld seam can fuse groove both sides completely when being reprocessed with guarantee；
S4.3, per pass postwelding are concave, and carry out VT inspections to welding bead, are ensured good with sidewall fusion；Per pass postwelding uses
Stainless steel brushing tungsten electrode and welding bead oxide on surface.
7. the automatic welding line restorative procedure of the narrow gap of large-scale pipeline as claimed in claim 1, it is characterised in that：The step
The defects of rapid S1, positions, or uses channel ultrasonic instrument, or is carried out using conventional UT methods.
8. a kind of automatic welding line repair system of the narrow gap of large-scale pipeline, the repair system include：
Weld and HAZ module, for the automatic welding line of the narrow gap carry out defect location, and using on pipeline weld before set
That puts is used to find out the anchor point of weld seam particular location, and weld defect is identified on pipe entity；
Weld defect excavates module, for the result based on defect location, carries out defect of pipeline and original weld heat-affected zone
Excavate；
Weld groove processing module, for after defect of pipeline is excavated, being processed to pipe welding seam groove；
Weld seam repair welding module, after the completion of being handled in retaining wall on slope, repair welding is carried out to pipe welding seam；
It is to utilize retaining wall on slope equipment that the weld defect, which excavates module, and defect of pipeline and original weld seam heat are carried out by cutoff tool
Excavate the zone of influence；
The thickness of every layer of pipe welding seam is A~Bmm, then the weld defect is excavated module and specifically included：
Process equipment installation process unit, beveling machine head is installed for process equipment, adjusts and fixed, make the excision track center of circle
And the track center of circle produces certain deviation during welding；
Process equipment checks processing unit, and for installing cutting knife and connecting beveling machine hydraulic station, rotating speed is adjusted to check at a slow speed
Machine operation；
Process equipment trial operation processing unit, for installing cutoff tool and centering, cutoff tool center is returned with fixed during centering
Repair axis of a weld to be completely superposed, trial operation adjusts deviation to meeting the requirements；
Process equipment cutting process unit, for cut at a slow speed when defect is excavated and the depth of cut be less than or equal to Amm, whole mistake
Cutter is cooled down using coolant in journey, is fathomed in cutting process, when depth of cut exceedes the minimum value of determination depth of defect
Afterwards, VT, a PT need to be carried out when often processing is less than or equal to Amm to finished surface to examine, depth of defect is determined until being cut to
Maximum, then stop excision；
Process equipment detection process unit, for when cut off weld penetration reach determination the defects of depth maximum after, to residue
Weld seam carries out RT detections, and it is clean to confirm that weld defect removes.
9. the automatic welding line repair system of the narrow gap of large-scale pipeline as claimed in claim 8, it is characterised in that：Cut off rail
The deviation in the track center of circle is 2-5mm when the road center of circle and welding.
10. the automatic welding line repair system of the narrow gap of large-scale pipeline as claimed in claim 8, it is characterised in that：It is described
Weld groove processing module carries out narrow gap weld seam using 5 degree of divided edge molding knives and reprocesses retaining wall on slope.
11. the automatic welding line repair system of the narrow gap of large-scale pipeline as claimed in claim 10, it is characterised in that：It is described
Weld groove processing module specifically includes：
Forming cutter installs working process unit, for removing cutoff tool, cleared of debris, installs 5 degree of forming cutters and carries out groove one side 5
Spend the processing on inclined-plane；After the completion for the treatment of unilateral oblique surface machining, current 5 degree of forming cutters are removed, are installed another that 5 degree of forming cutters progress are another
Side oblique surface machining；
Weld seam cleaning treatment unit, treat that both sides inclined-plane all machines, to the coolant that is remained in pipe surface and weld seam and
Chip is cleared up, and ensures the cleaning of weld seam；
Weld groove grinding process unit, for removing beveling machine, the polishing of weld groove is carried out using angular electric polishing machine.
12. the automatic welding line repair system of the narrow gap of large-scale pipeline as claimed in claim 8, it is characterised in that：It is described
The repair welding of weld seam repair welding module enables tungsten electrode to be inclined to groove side, and can change welding bead arrangement by bending tungsten electrode.
13. the automatic welding line repair system of the narrow gap of large-scale pipeline as claimed in claim 12, it is characterised in that：It is described
Weld seam repair welding module specifically includes：
Welding bead arrangement processing unit, for being taken after the preset value required by exceeding narrow gap automatic soldering technique when groove width
The row road mode of every layer of twice, with groove broaden subsequent passes arrangement quantity gradually increase；
Weld seam repair welding processing unit, during for repair welding, using curved tungsten electrode, first of weld seam can be by groove two during ensureing to reprocess
Side fuses completely；
Weld seam detection and cleaning processing unit, are concave for per pass postwelding, and VT inspections, guarantee and side wall are carried out to welding bead
Fusion is good；Per pass postwelding uses stainless steel brushing tungsten electrode and welding bead oxide on surface.
14. the automatic welding line repair system of the narrow gap of large-scale pipeline as claimed in claim 8, it is characterised in that：It is described
The defects of weld and HAZ module, positions, or uses channel ultrasonic instrument, or is carried out using conventional UT methods.
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| CN105855786A (en) * | 2016-05-18 | 2016-08-17 | 山东电力建设第工程公司 | Method for repairing welding defects of ultra-thick-wall pipe |
| CN106002081A (en) * | 2016-06-27 | 2016-10-12 | 共享铸钢有限公司 | Defect mending method for martensite heat-resistant steel threaded hole |
| CN108480825B (en) * | 2018-06-15 | 2020-07-28 | 苏州热工研究院有限公司 | Method for repairing narrow-gap automatic welding seam fusion penetration defect of nuclear power main pipeline |
| CN110977232B (en) * | 2020-01-03 | 2021-09-17 | 东方电气(广州)重型机器有限公司 | Welding method for cylinder and safety end |
| CN114833480B (en) * | 2021-11-02 | 2023-09-19 | 阳江核电有限公司 | Online automatic welding method and system for valve sealing lip weld joint |
| CN114083057B (en) * | 2021-12-20 | 2022-09-06 | 丰县飞洋金属制品有限公司 | Be used for metal pipe fittings to calibrate prosthetic devices |
| CN116748683A (en) * | 2023-08-23 | 2023-09-15 | 布柯玛蓄能器张家口有限公司 | Laser welding production process of diaphragm type energy accumulator shell |
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| GB0922096D0 (en) * | 2009-12-17 | 2010-02-03 | Saipem Spa | Pipeline weld repairing method and apparatus |
| CN102744553A (en) * | 2012-07-17 | 2012-10-24 | 上海中油天宝巴圣钢管有限公司 | Repair method for transversal cracks of welding seams of thick-wall submerged arc welded pipe |
| CN102848047B (en) * | 2012-09-07 | 2015-09-30 | 龙口中集来福士海洋工程有限公司 | Pipeline weld defect processing method |
| CN103084703B (en) * | 2013-01-25 | 2015-08-19 | 重庆理工大学 | A kind of large-scale interior empty steel-casting mends built-up welding reproducing method by replacing a damaged part |
| CN103586624A (en) * | 2013-11-01 | 2014-02-19 | 哈尔滨汽轮机厂有限责任公司 | After-sale repairing method for pipes |
| CN103801805B (en) * | 2014-01-21 | 2016-01-20 | 马鞍山马钢设备安装工程有限公司 | A kind of tuyere medium jacket of blast furnace welding repair method |
| CN104084678B (en) * | 2014-07-25 | 2016-06-22 | 哈电集团（秦皇岛）重型装备有限公司 | Adapter and safe end circumferential weld all positon gas tungsten arc welding welding method |
| CN104308399B (en) * | 2014-08-27 | 2016-03-02 | 中广核工程有限公司 | Nuclear power station CRDM pneumatic shell Ω seal weld weld defect repairing tool of automobile and method |
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