CN107598342A - A kind of large-scale pumped storage power generator entirety doleiform axle welding manufacture method - Google Patents
A kind of large-scale pumped storage power generator entirety doleiform axle welding manufacture method Download PDFInfo
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Abstract
The invention discloses a kind of large-scale pumped storage power generator entirety doleiform axle welding manufacture method, be related to radio frequency microwave circuit technical field, by the doleiform shaft part for preparing welding two-by-two between the position welded be processed into work there is into junction the Narrow sloping-glot of circular arc transition；The doleiform shaft part processed by step 1 is grouped according to riding position relation, the Narrow sloping-glot of two adjacent doleiform shaft parts is alignd the narrow gap slope weld seam to be welded to be formed with circular arc transition region, the opening of narrow gap slope weld seam is to the outside of doleiform shaft part；Single-sided welding is carried out to the narrow gap slope that the doleiform shaft part Jing Guo step 2 group pair is formed using narrow gap argonaut welding equipment, circular arc transition portion is welded first to design thickness, then groove is welded again, until filling up groove, this method realizes root run single face welding and double face shaping using narrow gap argonaut welding and narrow gap automatic submerged arc welding composite welding, back chipping, inner chamber do not process on the inside of weld seam, realize small internal diameter entirety doleiform axle welding manufacture success.
Description
Technical field
The present invention relates to radio frequency microwave circuit technical field, more particularly to a kind of large-scale pumped storage power generator entirety doleiform
Axle welding manufacture method.
Background technology
The internal diameter of large-scale pumped storage power generator entirety doleiform axle is less than or equal to 600mm, and the form of original main shaft is three
Segmentation and two-period form structure, intracavity space is little, and own wt is very big, and weld when need segmentation to be combined and installed, be related to lifting,
Alignment and fine welding, process are more complicated.
In the prior art, such as Publication No. CN1657211, the time of disclosure is August in 2005 24, entitled " hollow shaft
The Chinese invention patent document of motor-driven rotary electric arc narrow gap welding method and device ", and between a kind of rotating the arc is narrow
Gap welding method and device, belong to welding technology field.Its device includes welding cable coupling head, hollow shaft motor part, electricity
Brush feeding mechanism, nozzle mechanism and the velocity measurement mechanisms being made up of grating and optocoupler.It is it is characterized in that direct using hollow shaft motor
Driving conducting rod drives the straight type ignition tip motion that can stretch into gap, and makes brush and conducting rod method using single holddown spring
Blue table top realizes welding feed into being conductively connected into being closely slidably matched, and through connecting firmly the cable on brush and coupling head, makes
The end that welding wire is sent out through motor-hollow axle and conducting rod centre bore from ignition tip eccentric orfice produces rotating the arc, while adapted
Multi-form nozzle mechanism, realize rotating the arc narrow gap welding.The present invention is practical, and implementation cost is low, and using effect is good；
Its apparatus structure designs simple and compact, and motor driving power is small, and brush life is high, and running noises are low, easy to maintenance.
For another example Publication No. CN204934934U, time of disclosure are on January 6th, 2016, a kind of entitled " large-scale roller bearing envelope
The Chinese invention utility model patent document of mouthful welding tooling ", discloses a kind of large-scale roller bearing seal welding frock, including for
Clamp the simultaneously clamping rotating mechanism of swing roller and be respectively used to weld first welding mechanism and the second bonding machine at roller bearing both ends
Structure；The clamping rotating mechanism includes the first grip slipper and the second grip slipper being oppositely arranged；Set on first grip slipper
There is a clamping oil cylinder coaxial with roller bearing, the piston rod free end of the clamping oil cylinder is towards second grip slipper and be provided with can
With the first thimble rotated freely；Coaxial with roller bearing and rotatable second thimble, institute are provided with second grip slipper
Second thimble one end is stated to be arranged on second grip slipper and connect electric rotating machine；First welding mechanism includes the first weldering
Rifle, first level slide and first level sliding block move；Second welding mechanism includes the second welding gun.
It is still overall without solving large scale but above-mentioned technical proposal is the improvement carried out from the structure of welding equipment
Need segmentation to be combined and installed in doleiform axle welding process, weld back chipping, embedded SMA actuators the problem of.
The content of the invention
It is an object of the invention to provide one kind to use narrow gap argonaut welding and narrow gap automatic submerged-arc welding composite weld
Connect and realize root run single face welding and double face shaping, back chipping, inner chamber do not process on the inside of weld seam, realize small internal diameter entirety doleiform axle weldering
Connect the successful large-scale pumped storage power generator entirety doleiform axle welding manufacture method of manufacture.
The purpose of the present invention is achieved through the following technical solutions：
A kind of generator entirety doleiform axle welding manufacture method, it is characterised in that comprise the following steps：
Step 1, by the doleiform shaft part for preparing welding two-by-two between the position welded be processed into work there is circular arc into junction
The Narrow sloping-glot of transition；
Step 2, the doleiform shaft part processed by step 1 is grouped according to riding position relation, makes two adjacent doleiform shaft parts
Narrow sloping-glot align the narrow gap slope weld seam to be welded to be formed with circular arc transition region, the opening of narrow gap slope weld seam
To the outside of doleiform shaft part；
Step 3, the narrow gap slope weld seam formed using narrow gap argonaut welding equipment to the doleiform shaft part Jing Guo step 2 group pair
Single-sided welding is carried out, circular arc transition portion is welded first to design thickness, narrow gap automatic submerged-arc then is carried out to groove again
Weldering formula is welded, until filling up groove.
The step 1, have circular arc transition Narrow sloping-glot refer to the welding end margin of doleiform shaft part from inwall to
The ramped shaped opening of outer wall, and it is provided with two circular arc curve transitions in the position close to inwall.
The step 2, during the Narrow sloping-glot alignment of two adjacent doleiform shaft parts, its inwall split and flush, fascia edge
Between form the opening on the narrow gap slope.
The seam gap of the circular arc transition region is not more than 3mm, and narrow gap seam thickness is not more than 4mm.
In the step 3, welding is carried out under three-layer protection gaseous environment, and the protective gas is 99.99%Ar,
First layer gas shield flow is 15L/min, and second layer gas shield flow is 30L/min, and third layer gas shield flow is
12L/min。
In the step 3, narrow gap argonaut welding equipment during welding, peak point current 230A, background current 190A,
Weldingvoltage 11-14V, the mm/min of speed of welding 40, the mm/min of wire feed rate 50.
In the step 3, the welding is to wave to become rail welding procedure, narrow gap argonaut welding using upper and lower asymmetry
The soldering tip of equipment is first according to 25 ° of swinging, the weave mode of 10 ° of lower swinging has welded first lap, then become rail according to
Upper 10 ° of swinging, the weave mode of 25 ° of lower swinging weld next circle, complete once asymmetry and wave change rail welding, Zhi Houchong
Multiple above-mentioned asymmetry, which is waved, becomes rail welding until welding is completed.
363 ° of the soldering tip welding rotation of the narrow gap argonaut welding equipment is considered as the circle of completion one, is welded 363 ° of positions
Current attenuation to 60A, soldering tip waves stopping, stopping welding wire feeding, into orbital transfer area, is welded with normal weld speed to lower floor's welding bead
Connect 3 ° to complete to become rail, become rail and terminate to recover welding current and welding wire feeding, continue next lap welding and connect.
It is in vertical by doleiform shaft part of the group to after when welding circular arc transition portion to design thickness in the step 3
It is placed on turntable, narrow gap argonaut welding alignment circular arc transition portion, doleiform shaft part of the turntable drive group to after is realized
Annular solder.
In the step 3, when being welded to groove, be by all doleiform shaft part groups pair and complete to circular arc transition part
After dividing welding, molded doleiform axle is placed on turning rolls in horizontal, narrow gap automatic submerged arc welding alignment groove part, rolling
Wheel carrier drives doleiform axle to rotate and realizes annular solder.
Beneficial effects of the present invention are as follows：
First, a kind of large-scale pumped storage power generator entirety doleiform axle welding manufacture method provided by the invention, by bottle to be welded
The weld edge of shape shaft part is processed into the Narrow sloping-glot with circular arc transition, can realize that narrow gap welding is grasped in order to the later stage
Make, reduce the difficulty of welding, while can be by controlling the ramp direction of Narrow sloping-glot avoid need to also be from inside after assembly
Implement welding, solve the large-scale pumped storage power generator entirety doleiform axle welding system that internal diameter is small, inner side can not carry out soldering seam grinding
Make technology, by the way of narrow gap argonaut welding and narrow gap automatic submerged arc welding composite welding, realize single face welding and double face into
Type, weld joint on inner side are designed, first using narrow gap without back chipping using the Narrow sloping-glot of circular arc transition unique double R
Argonaut welding is welded, and welding groove to design thickness, is filled up groove using narrow-clearance submerged arc welding afterwards, is realized narrow gap
To the welding pattern transition of narrow gap automatic submerged arc welding, the present invention changes original main axle structure form, uses for argonaut welding
It is an entirety that three sections of main shafts are welded in narrow gap argonaut welding and narrow gap automatic submerged arc welding, so as to realize large-scale pumped storage power
Generator entirety axle（A point multistage is avoided to be combined and installed）Manufacture, realize mitigate unit weight, effectively improve rotating shaft critical speed.
2nd, a kind of large-scale pumped storage power generator entirety doleiform axle welding manufacture method provided by the invention, according to doleiform
The size design slope type of axle, wherein submerged arc section, using double R transition, ensure the automatic argon arc of narrow gap with argon arc welding section junction
Postwelding slope type meets narrow gap automatic submerged arc welding slope type；The seam processed in the lump during using retaining wall on slope positions,
Ensure assembly precision；Narrow gap argonaut welding is welded：First paragraph and second segment are subjected to doleiform shaft vertical on positioner first
Assembling, using narrow gap argonaut welding, welding root groove realizes single face welding and double face shaping, welding groove to design thickness.
3rd, the manufacturer of a kind of large-scale pumped storage power generator entirety doleiform axle welding manufacture method provided by the invention
Method, it is not required to swing using first of narrow gap argonaut welding and lower melt run weld seam tungsten electrode, as soldering tip during melt run of burn-oning
Tungsten electrode need to swing；Asymmetry waves technology up and down for tungsten electrode use：Upper 25 ° of swinging, lower 10 ° of welding upper strata welding beads of swinging,
Become rails 363 ° of positions, i.e. tungsten electrode downward welding bead since the welding bead of upper strata becomes rail, 363 ° of position welding currents decay to 60A,
Tungsten electrode waves stopping, stopping welding wire feeding, into orbital transfer area, completes to become rails for 3 ° to lower floor's pass weld with normal weld speed,
Become rail to terminate to recover welding current and welding wire feeding；Tungsten electrode waves 10 ° of swinging, and lower 25 ° of swinging welds lower floor's welding beads, under
Layer pass weld to becoming rail after 363 ° again；Non junction in welding process is realized, every layer of levels welding bead starting the arc Shou Hu area is wrong
Open 6 °.
Brief description of the drawings
Fig. 1 is doleiform shaft part group of the present invention to splicing a kind of preferred scheme schematic diagram；
Fig. 2 is a kind of preferred scheme schematic diagram of narrow gap slope of the present invention weld seam；
Fig. 3 is a kind of preferred scheme schematic diagram that the of the present invention group of doleiform shaft part to after is in vertical placement；
Fig. 4 is a kind of preferred scheme schematic diagram that the of the present invention group of doleiform shaft part to after is in horizontal placement.
Fig. 5 becomes rail schematic diagram for present invention welding.
Embodiment
Below by way of several specific embodiments come further illustrate realize the object of the invention technical scheme, it is necessary to explanation
It is that technical scheme is including but not limited to following examples.
Embodiment 1
Such as Fig. 1 to 5, a kind of generator entirety doleiform axle welding manufacture method, comprise the following steps：
Step 1, by the doleiform shaft part for preparing welding two-by-two between the position welded be processed into work there is circular arc into junction
The Narrow sloping-glot of transition；
Step 2, the doleiform shaft part processed by step 1 is grouped according to riding position relation, makes two adjacent doleiform shaft parts
Narrow sloping-glot align the narrow gap slope weld seam to be welded to be formed with circular arc transition region, the opening of narrow gap slope weld seam
To the outside of doleiform shaft part；
Step 3, the narrow gap slope weld seam formed using narrow gap argonaut welding equipment to the doleiform shaft part Jing Guo step 2 group pair
Single-sided welding is carried out, circular arc transition portion is welded first to design thickness, narrow gap automatic submerged-arc then is carried out to groove again
Weldering formula is welded, until filling up groove.
This is a kind of most basic embodiment of the present invention.The weld edge of doleiform shaft part to be welded is processed into
Narrow sloping-glot with circular arc transition, it can realize that narrow gap welding operates in order to the later stage, reduce the difficulty of welding, while can
By controlling the ramp direction of Narrow sloping-glot to avoid that also welding need to be implemented from inside after assembly, solve that internal diameter is small, inner side
The large-scale pumped storage power generator entirety doleiform axle welding manufacture technology of soldering seam grinding can not be carried out, using the automatic argon arc of narrow gap
Weldering and the mode of narrow gap automatic submerged arc welding composite welding, realize single face welding and double face shaping, and weld joint on inner side uses without back chipping
The Narrow sloping-glot design of circular arc transition unique double R, is welded using narrow gap argonaut welding welding gun, is welded first
Groove fills up groove using narrow-clearance submerged arc welding afterwards, realizes that narrow gap argonaut welding is automatic to narrow gap to design thickness
The welding pattern transition of submerged-arc welding, the present invention change original main axle structure form, using narrow gap argonaut welding and it is narrow between
Three sections of main shaft welderings are an entirety by gap automatic submerged arc welding, so as to realize large-scale pumped storage power generator entirety axle（More than avoiding point
Section is combined and installed）Manufacture, realize mitigate unit weight, effectively improve rotating shaft critical speed.
Embodiment 2
Such as Fig. 1 to 5, a kind of generator entirety doleiform axle welding manufacture method, comprise the following steps：
Step 1, by the doleiform shaft part for preparing welding two-by-two between the position welded be processed into work there is circular arc into junction
The Narrow sloping-glot of transition；
Step 2, the doleiform shaft part processed by step 1 is grouped according to riding position relation, makes two adjacent doleiform shaft parts
Narrow sloping-glot align the narrow gap slope weld seam to be welded to be formed with circular arc transition region, the opening of narrow gap slope weld seam
To the outside of doleiform shaft part；
Step 3, the narrow gap slope weld seam formed using narrow gap argonaut welding equipment to the doleiform shaft part Jing Guo step 2 group pair
Single-sided welding is carried out, circular arc transition portion is welded first to design thickness, narrow gap automatic submerged-arc then is carried out to groove again
Weldering formula is welded, until filling up groove；
The step 1, the Narrow sloping-glot with circular arc transition refer to the welding end margin of doleiform shaft part from inwall to outer wall
Ramped shaped opening, and be provided with two circular arc curve transitions close to the position of inwall；
The step 2, during the Narrow sloping-glot alignment of two adjacent doleiform shaft parts, its inwall split and flush, shape between fascia edge
Into the opening on the narrow gap slope；
The seam gap of the circular arc transition region is not more than 3mm, and narrow gap seam thickness is not more than 4mm.
This is a kind of preferred embodiment of the present invention.The weld edge of doleiform shaft part to be welded is processed into tool
There is the Narrow sloping-glot of circular arc transition, can realize that narrow gap welding operates in order to the later stage, reduce the difficulty of welding, while can be with
By controlling the ramp direction of Narrow sloping-glot avoid that also welding need to be implemented from inside after assembly, solve internal diameter is small, inner side not
The large-scale pumped storage power generator entirety doleiform axle welding manufacture technology of soldering seam grinding can be carried out, using narrow gap argonaut welding
With the mode of narrow gap automatic submerged arc welding composite welding, single face welding and double face shaping is realized, weld joint on inner side is without back chipping, using double
The Narrow sloping-glot design of circular arc transition unique R, is welded using narrow gap argonaut welding welding gun, welds slope first
Mouth fills up groove using narrow-clearance submerged arc welding afterwards, realizes that narrow gap argonaut welding is buried automatically to narrow gap to design thickness
The welding pattern transition of arc-welding, the present invention changes original main axle structure form, using narrow gap argonaut welding and narrow gap
Three sections of main shaft welderings are an entirety by automatic submerged arc welding, so as to realize large-scale pumped storage power generator entirety axle（Avoid a point multistage
It is combined and installed）Manufacture, realize mitigate unit weight, effectively improve rotating shaft critical speed；Size design slope according to doleiform axle
Shape of the mouth as one speaks formula, wherein submerged arc section are with argon arc welding section junction using double R transition, and slope type is expired after ensureing narrow gap argonaut welding
Sufficient narrow gap automatic submerged arc welding slope type；The seam processed in the lump during using retaining wall on slope positions, and ensures assembly precision；It is narrow
Gap argonaut welding welding：First paragraph and second segment are subjected to doleiform shaft vertical assembling on positioner first, using narrow gap
Argonaut welding, welding root groove realize single face welding and double face shaping, welding groove to design thickness.
Embodiment 3
Such as Fig. 1 to 5, a kind of generator entirety doleiform axle welding manufacture method, comprise the following steps：
Step 1, by the doleiform shaft part for preparing welding two-by-two between the position welded be processed into work there is circular arc into junction
The Narrow sloping-glot of transition；
Step 2, the doleiform shaft part processed by step 1 is grouped according to riding position relation, makes two adjacent doleiform shaft parts
Narrow sloping-glot align the narrow gap slope weld seam to be welded to be formed with circular arc transition region, the opening of narrow gap slope weld seam
To the outside of doleiform shaft part；
Step 3, the narrow gap slope weld seam formed using narrow gap argonaut welding equipment to the doleiform shaft part Jing Guo step 2 group pair
Single-sided welding is carried out, circular arc transition portion is welded first to design thickness, narrow gap automatic submerged-arc then is carried out to groove again
Weldering formula is welded, until filling up groove；
The step 1, the Narrow sloping-glot with circular arc transition refer to the welding end margin of doleiform shaft part from inwall to outer wall
Ramped shaped opening, and having two circular arc transition bending close to the position of inwall；
The step 2, during the Narrow sloping-glot alignment of two adjacent doleiform shaft parts, its inwall split and flush, shape between fascia edge
Into the opening on the narrow gap slope；
The throat depth of the circular arc transition region is not more than 3mm, and narrow gap slope throat depth is not more than 4mm；
In the step 3, welding is carried out under three-layer protection gaseous environment, and the protective gas is 99.99%Ar, and first
Layer gas shield flow is 15L/min, and second layer gas shield flow is 30L/min, and third layer gas shield flow is 12L/
min；
In the step 3, narrow gap argonaut welding equipment during welding, peak point current 230A, background current 190A, welding
Voltage 11-14V, the mm/min of speed of welding 40, the mm/min of wire feed rate 50；
In the step 3, the welding is to wave to become rail welding procedure, narrow gap argonaut welding equipment using upper and lower asymmetry
Soldering tip be first according to 25 ° of swinging, the weave mode of 10 ° of lower swinging has welded first lap, then become rail according to upper pendulum
10 ° of angle, the weave mode of 25 ° of lower swinging weld next circle, complete once asymmetry and wave change rail welding, repeat afterwards
State asymmetry and wave and become rail welding until welding is completed；
363 ° of the soldering tip welding rotation of the narrow gap argonaut welding equipment is considered as the circle of completion one, in 363 ° of position welding currents
Decay to 60A, soldering tip waves stopping, stopping welding wire being sent into, into orbital transfer area, with normal weld speed to 3 ° of lower floor's pass weld
Complete to become rail, become rail and terminate to recover welding current and welding wire feeding, continue next lap welding and connect；
In the step 3, when welding circular arc transition portion to design thickness, it by doleiform shaft part of the group to after is in vertical placement to be
On turntable, narrow gap argonaut welding alignment circular arc transition portion, doleiform shaft part of the turntable drive group to after realizes annular
Welding；
It is to weld all doleiform shaft part groups pair and completion to circular arc transition portion when being welded to groove in the step 3
After connecing, molded doleiform axle is placed on turning rolls in horizontal, narrow gap argonaut welding alignment groove part, turning rolls
Drive doleiform axle to rotate and realize annular solder.
This is a kind of preferred embodiment of the present invention.The weld edge of doleiform shaft part to be welded is processed into tool
There is the Narrow sloping-glot of circular arc transition, can realize that narrow gap welding operates in order to the later stage, reduce the difficulty of welding, while can be with
By controlling the ramp direction of Narrow sloping-glot avoid that also welding need to be implemented from inside after assembly, solve internal diameter is small, inner side not
The large-scale pumped storage power generator entirety doleiform axle welding manufacture technology of soldering seam grinding can be carried out, using narrow gap argonaut welding
With the mode of narrow gap automatic submerged arc welding composite welding, single face welding and double face shaping is realized, weld joint on inner side is without back chipping, using double
The Narrow sloping-glot design of circular arc transition unique R, is welded using narrow gap argonaut welding welding gun, welds slope first
Mouth fills up groove using narrow-clearance submerged arc welding afterwards, realizes that narrow gap argonaut welding is buried automatically to narrow gap to design thickness
The welding pattern transition of arc-welding, the present invention changes original main axle structure form, using narrow gap argonaut welding and narrow gap
Three sections of main shaft welderings are an entirety by automatic submerged arc welding, so as to realize large-scale pumped storage power generator entirety axle（Avoid a point multistage
It is combined and installed）Manufacture, realize mitigate unit weight, effectively improve rotating shaft critical speed；Size design slope according to doleiform axle
Shape of the mouth as one speaks formula, wherein submerged arc section are with argon arc welding section junction using double R transition, and slope type is expired after ensureing narrow gap argonaut welding
Sufficient narrow gap automatic submerged arc welding slope type；The seam processed in the lump during using retaining wall on slope positions, and ensures assembly precision；It is narrow
Gap argonaut welding welding：The first paragraph for having carried out narrow gap argonaut welding and second segment group weldering body are being turned with the 3rd section
Doleiform shaft vertical assembling is carried out on tire, using narrow gap argonaut welding, welding root groove realizes single face welding and double face shaping, welds
Groove is connect to design thickness；It is not required to swing using first of narrow gap argonaut welding and lower melt run weld seam tungsten electrode, burn-ons molten
Tungsten electrode during zygonema as soldering tip needs to swing；Asymmetry waves technology up and down for tungsten electrode use：Upper 25 ° of swinging, lower 10 ° of swinging
Upper strata welding bead is welded, becomes rail 363 ° of positions, be i.e. tungsten electrode downward welding bead since the welding bead of upper strata becomes rail, in 363 ° of position welding electricity
Stream, which decays to 60A, tungsten electrode waves stopping, stopping welding wire being sent into, into orbital transfer area, with normal weld speed to lower floor's pass weld
Complete for 3 ° to become rail, become rail and terminate to recover welding current and welding wire feeding；Tungsten electrode waves 10 ° of swinging, lower 25 ° of welding of swinging
Lower floor's welding bead, lower floor's pass weld to becoming rail after 363 ° again；Non junction in welding process is realized, every layer of levels welding bead rises
Stagger 6 ° in Hu Shouhu areas.
Embodiment 4
Such as Fig. 1 to 5, a kind of generator entirety doleiform axle welding manufacture method, comprise the following steps：
（a）Generator entirety doleiform axle is divided into three sections, three sections of axles for preparing welding are processed into R arc transitions groove type slope in pairs
Mouth and group pair；
（b）Motor entirety doleiform axle is in vertical placement, and positioner drives doleiform axle to rotate, using narrow gap argonaut welding to root
Groove carries out horizontal position welding welding, carries out single face welding and double face shaping, welding groove to design thickness.
（c）Motor entirety doleiform axle is in horizontal placement, and turning rolls drives doleiform axle to rotate, using narrow gap argonaut welding
Downhand welding welding is carried out to root groove, fills up groove.
Design suitable narrow gap argonaut welding and narrow gap automatic submerged arc welding composite welding realizes root run one side
Weld the slope type of double-faced forming.
Seam region throat depth is not more than 4mm, and seam gap is not more than 3mm.Peak point current 230A, background current
190A, weldingvoltage 11-14V, the mm/min of speed of welding 40, the mm/min of wire feed rate 50.
Using three-layer protection gas, protective gas 99.99%Ar, first layer gas shield flow is 15L/min, second
Layer gas shield flow is 30L/min, and third layer gas shield flow is 12L/min.
Technology, upper 25 ° of swinging, lower 10 ° of welding upper strata welding beads of swinging, 363 ° of positions are waved using upper and lower asymmetry
Become rail, i.e. tungsten electrode downward welding bead since the welding bead of upper strata becomes rail, 363 ° of position welding currents decay to 60A, tungsten electrode is waved and stopped
Only, stop welding wire being sent into, into orbital transfer area, complete to become rail for 3 ° to lower floor's pass weld with normal weld speed, change rail terminates extensive
Multiple welding current and welding wire are sent into.Tungsten electrode waves 10 ° of swinging, lower 25 ° of welding lower floor welding beads of swinging, lower floor's pass weld
Become rail again after to 363 °.Non junction in welding process is realized, every layer of levels welding bead starting the arc Shou Hu area staggers 6 °.
After clearing up narrow gap argonaut welding, check that groove size meets to want on the basis of narrow gap argonaut welding
After asking, downhand welding welding is carried out using narrow gap automatic submerged arc welding.
First and lower melt run weld seam tungsten electrode are not required to swing, and tungsten electrode needs to swing during melt run of burn-oning.
Embodiment 5
By taking ASTM A668D pumped-storage power generation arbors as an example, large-scale pumped storage power generator entirety doleiform axle of the present invention is welded
Manufacturing technology is specifically described：
（1）Mother metal：ASTM A668D forging, intracavity diameter 600mm, throat depth 200mm, overall length 9862mm, 65 tons of weight.
（2）Narrow gap argonaut welding welding material：Welding wire ￠ 1.2AWS ER70S-G；Protective gas 99.99%Ar.
（3）Narrow gap adopting automatic submerged arc welding material：Welding wire ￠ 4.0AWS EM12K；Solder flux F7P6-EM12K.
（4）Double R arc transitions groove type grooves（R1=8mm, R2=11mm）.
（5）Removing surface：The cleanings such as greasy dirt, moisture and the oxide in the range of groove and both sides 50mm are done before welding
Only.
（6）Narrow gap argonaut welding welding position：Horizontal position welding
Narrow gap adopting automatic submerged arc welding position：Downhand welding
（7）As found, tungsten electrode scaling loss need to be changed in time in narrow gap argonaut welding welding process, and under normal circumstances, 2 is small
Tungsten electrode of Shi Genghuan.
（8）Visual examination：Weld seam single face welding and double face shaping, root of weld surface forming are good.
（9）Defect detecting test：UT and MT flaw detection zero defects.
（10）Welding qualification mechanical properties test：It is qualified more than the lower limit of strength of parent, assay.
（11）Welding qualification bending is examined：Sample carries out bend test by standard and reaches 180 °, has no crackle, assay
It is qualified.
For another example,（1）Mother metal：ASTM A668E forging, intracavity diameter 580mm, throat depth 330mm, overall length 9934mm, weight
114 tons of amount.
（2）Narrow gap argonaut welding welding material：Welding wire ￠ 1.2AWS ER70S-G；Protective gas 99.99%Ar.
（3）Narrow gap adopting automatic submerged arc welding material：Welding wire ￠ 4.0AWS EM12K；Solder flux F7P6-EM12K.
（4）Double R arc transitions groove type grooves（R1=7.8mm, R2=11mm）.
（5）Removing surface：The cleanings such as greasy dirt, moisture and the oxide in the range of groove and both sides 50mm are done before welding
Only.
（6）Narrow gap argonaut welding welding position：Horizontal position welding
Narrow gap adopting automatic submerged arc welding position：Downhand welding
（7）As found, tungsten electrode scaling loss need to be changed in time in narrow gap argonaut welding welding process, and under normal circumstances, 2 is small
Tungsten electrode of Shi Genghuan.
（8）Visual examination：Weld seam single face welding and double face shaping, root of weld surface forming are good.
（9）Defect detecting test：UT and MT flaw detection zero defects.
（10）Welding qualification mechanical properties test：It is qualified more than the lower limit of strength of parent, assay.
（11）Welding qualification bending is examined：Sample carries out bend test by standard and reaches 180 °, has no crackle, assay
It is qualified.
Claims (10)
1. a kind of generator entirety doleiform axle welding manufacture method, it is characterised in that comprise the following steps：
Step 1, by the doleiform shaft part for preparing welding two-by-two between the position welded be processed into work there is circular arc into junction
The Narrow sloping-glot of transition；
Step 2, the doleiform shaft part processed by step 1 is grouped according to riding position relation, makes two adjacent doleiform shaft parts
Narrow sloping-glot align the narrow gap slope weld seam to be welded to be formed with circular arc transition region, the opening of narrow gap slope weld seam
To the outside of doleiform shaft part；
Step 3, the narrow gap slope weld seam formed using narrow gap argonaut welding equipment to the doleiform shaft part Jing Guo step 2 group pair
Single-sided welding is carried out, circular arc transition portion is welded first to design thickness, narrow gap automatic submerged-arc then is carried out to groove again
Weldering formula is welded, until filling up groove.
A kind of 2. generator entirety doleiform axle welding manufacture method as claimed in claim 1, it is characterised in that：The step 1,
Narrow sloping-glot with circular arc transition refers to ramped shaped opening of the welding end margin of doleiform shaft part from inwall to outer wall, and
Two circular arc curve transitions are provided with the position close to inwall.
A kind of 3. generator entirety doleiform axle welding manufacture method as claimed in claim 1, it is characterised in that：The step 2,
During the Narrow sloping-glot alignment of two adjacent doleiform shaft parts, its inwall split and flush, the narrow gap slope is formed between fascia edge
Opening.
A kind of 4. generator entirety doleiform axle welding manufacture method as claimed in claim 1 or 2, it is characterised in that：The circle
The seam gap in arc-shaped transition area is not more than 3mm, and narrow gap seam thickness is not more than 4mm.
A kind of 5. generator entirety doleiform axle welding manufacture method as claimed in claim 1, it is characterised in that：The step 3
In, welding is carried out under three-layer protection gaseous environment, and the protective gas is 99.99%Ar, first layer gas shield flow
For 15L/min, second layer gas shield flow is 30L/min, and third layer gas shield flow is 12L/min.
A kind of 6. generator entirety doleiform axle welding manufacture method as claimed in claim 1, it is characterised in that：The step 3
In, narrow gap argonaut welding equipment during welding, peak point current 230A, background current 190A, weldingvoltage 11-14V, weldering
Meet the mm/min of speed 40, the mm/min of wire feed rate 50.
A kind of 7. generator entirety doleiform axle welding manufacture method as described in claim 1 or 6, it is characterised in that：The step
In rapid 3, the welding is to wave to become rail welding procedure using upper and lower asymmetry, and the soldering tip of narrow gap argonaut welding equipment is first
Weave mode according to upper 25 ° of swinging, 10 ° of lower swinging has welded first lap, then become rail according to upper 10 ° of swinging, under
The weave mode that 25 ° of swinging welds next circle, completes once asymmetry and waves change rail welding, repeats above-mentioned asymmetry afterwards and shake
Pendulum becomes rail welding until welding is completed.
A kind of 8. generator entirety doleiform axle welding manufacture method as claimed in claim 7, it is characterised in that：The narrow gap
363 ° of the soldering tip welding rotation of argonaut welding equipment is considered as the circle of completion one, and 60A, soldering tip are decayed in 363 ° of position welding currents
Wave stopping, stopping welding wire feeding, into orbital transfer area, complete to become rails for 3 ° to lower floor's pass weld with normal weld speed, become rail
Terminate to recover welding current and welding wire is sent into, continue next lap welding and connect.
A kind of 9. generator entirety doleiform axle welding manufacture method as claimed in claim 1, it is characterised in that：The step 3
In, it is to be placed on doleiform shaft part of the group to after on turntable in vertical when welding circular arc transition portion to design thickness, narrow
Gap argonaut welding is directed at circular arc transition portion, and doleiform shaft part of the turntable drive group to after realizes annular solder.
A kind of 10. generator entirety doleiform axle welding manufacture method as described in claim 1 or 9, it is characterised in that：The step
In rapid 3, when being welded to groove, be by all doleiform shaft part groups pair and complete to circular arc transition portion weld after, by
The doleiform axle of shaping is placed on turning rolls in horizontal, and narrow gap automatic submerged arc welding alignment groove part, turning rolls drives doleiform
Axle rotates and realizes annular solder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711090582.7A CN107598342B (en) | 2017-11-08 | 2017-11-08 | Welding manufacturing method for integral bottle-shaped shaft of large pumped storage generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711090582.7A CN107598342B (en) | 2017-11-08 | 2017-11-08 | Welding manufacturing method for integral bottle-shaped shaft of large pumped storage generator |
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| CN107598342A true CN107598342A (en) | 2018-01-19 |
| CN107598342B CN107598342B (en) | 2020-02-14 |
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| CN201711090582.7A Active CN107598342B (en) | 2017-11-08 | 2017-11-08 | Welding manufacturing method for integral bottle-shaped shaft of large pumped storage generator |
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| CN107598342B (en) | 2020-02-14 |
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