CN106541060A - A kind of rolling production method of super-large diameter aluminium alloy integral loop - Google Patents
A kind of rolling production method of super-large diameter aluminium alloy integral loop Download PDFInfo
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Abstract
The invention belongs to looping mill rolling forming technique field, and in particular to a kind of rolling production method of super-large diameter aluminium alloy integral loop.Technical solution of the present invention adopts looping mill rolling forming technique, speed, footpath axial direction feed rate, footpath axial direction drafts, rolling ratio, core roller diameter, looping mill rolling fire are increased by the rolling deformation temperature of control super large-scale aluminium alloy ring, diameter inferior, realizing the stable of the super-large diameter aluminium alloy integral loop operation of rolling is persistently carried out, effective control ring dimensional accuracy, ovality and footpath axial deflection, product quality concordance and conforming product rate are improve, the technical requirement of product is met.
Description
Technical field
The invention belongs to looping mill rolling forming technique field, and in particular to a kind of super-large diameter aluminium alloy integral loop is rolled
Production method processed.
Background technology
Large ring is widely used in each industrial circle, such as the bearing ring of wind power equipment and gear ring billet,
Stiffening ring of transition rings, pressure vessel and nuclear reactor of carrier rocket etc..In recent years, sending out with industry
Exhibition, every profession and trade is increasing to the demand of large ring, performance requirement also more and more higher, therefore studies big
The manufacturing process of type ring is particularly important.
Integral loop roll forming belongs to radial-axial compression, tangentially extending forging process, including：Straight line enters
To the rotation and enlarged-diameter motion of motion, rotation rolling motion, guiding movement and ring itself, this makes
Ring roll form process must be controlled extremely complex.Using the super-huge ring forging of the technology production, not only have
The features such as having overall dimensions high precision, material consumption few, and can be effectively improved material inside organization structure and
Its uniformity, metallic fiber circumferentially continuous arrangement are adapted with the stress of part and abrasion, inherent quality
Excellent, combination property is high.Overall forging-ring is overall machined piece simultaneously, therefore large-scale integral loop rolls drip molding
After processing, the dimensional accuracy height of part, quality conformance and good stability, reliability are high.
At present, domestic many units successfully roll out 5 meter level of diameter, 2219 aluminium alloy rings, and navigate in aviation
Its field has obtained widely applying, but the aluminium alloy of more than 5 meters of diameter entirety ring also belongs to empty at home
In vain.With the further increase of ring size, particularly with diameter greater than 8m after, the rigidity of ring weakens significantly,
Plastic instability is produced in the operation of rolling easily so that during looping mill rolling, the circularity and dimensional accuracy of ring is difficult control
System；Simultaneously because the changes of section of large ring is big, folding, roll banding, surface during looping mill rolling, are easily produced
The defects such as peeling, polygon, so as to cause ring rolling process to terminate or product rejection, therefore its rolling
Technical process is more complicated, and the control to rolling process it is also proposed higher requirement.
Therefore, the shaping process of accuracy controlling super-large diameter entirety ring, realizes that Φ 8-10m rings are produced
The Collaborative Control of product " shape-performance ", the rolling technique level to improving domestic super-large diameter ring have very big
Facilitation, becomes the important technology of China's urgent need to resolve in this technical field.
The content of the invention
The technical problem to be solved in the present invention is to realize Φ 8-10m super-large diameter aluminium alloy integral loop roll formings,
The circularity and dimensional accuracy of control ring, it is ensured that ring rolling process stabilization is persistently carried out, to super-large diameter aluminum
" shape-property " Collaborative Control of alloy entirety ring, so as to the use for meeting China's super-large diameter entirety ring will
Ask.
In order to realize this purpose, the present invention is adopted the technical scheme that：
A kind of rolling production method of super-large diameter aluminium alloy integral loop, comprises the steps：
(1) prepared by ring billet：Needed for being prepared by free forging method, the ring billet of specification, machines and surpasses
Sonic flaw detection is detected, it is ensured that obtain qualified looping mill rolling blank；
Forging processing：Open die forging mode obtain external diameter for 3500～4500mm, internal diameter be 3000～3500mm,
It is highly the ring billet of 500～650mm；
Vehicle Processing：The upper and lower end face of ring billet and inside and outside disc are machined, surface casting skin and folding is removed
Folded wound, surface roughness reach more than Ra3.2, and roundness control is within 1mm；
Ultrasonic examination：100% ultrasonic examination is carried out to blank upper surface, by GJB2057 standard A levels
Check and accept, exclude excessive defect；
(2) ring billet heating：Looping mill rolling blank in electric furnace is carried out heating, is incubated；
(3) looping mill rolling shaping：Two fiery secondary rings are carried out to looping mill rolling blank and rolls into shape；Including：
(3.1) transport：Looping mill rolling blank after heating is transported on looping mill, transhipment time is less than 290s,
Blank surface temperature drop is controlled within 40 DEG C；
(3.2) heating once and rollings：Roll off is carried out to looping mill rolling blank using the core roller of a diameter of 400～600mm,
The external diameter of roll off to looping mill rolling blank is 5000～6000mm, is highly 450～600mm, rolling than for 1.2～
2.0, the ratio of footpath axial direction drafts is 2.0～3.0；
The operation of rolling point bite stage, quick rolling sequence, the stable rolling stage, deceleration rolling sequence and into
The shape full circle stage, totally 5 stages were carried out：
Bite stage：Looping mill rolling blank nips roll gap, begins setting up the operation of rolling, and the stage only carries out radially rolling
System, axial roll are axially only rolled due to spreading that radial rolling causes without feeding, and bite stage rolling is thick
Angle value is the 5% of whole rolling thickness variable quantity；Just Magnification is 1～3mm/s, straight to diameter in this stage
Footpath end Magnification be 3～5mm/s, radial feed speed be 0.02～0.06mm/s, axial feed speed be 0～
0.02mm/s；
Quick rolling sequence：Roll radial feed speed is accelerated, looping mill rolling blank fast growth therewith, axially enters
To by the feeding proportional to radial feed, quick rolling sequence rolling thickness value changes for whole rolling thickness
The 15% of amount；This stage diameter just Magnification be 3～5mm/s, diameter end Magnification be 5～12mm/s,
Radial feed speed is 0.06～0.3mm/s, axial feed speed is 0.02～0.15mm/s；
The stable rolling stage：The feed speed of control core roller and cone roller so as to increase with the diameter of looping mill rolling blank
Speed matches, and the operation of rolling quickly, is stably carried out, and stable rolling stage rolling thickness value is entirely to roll
The 60% of amounts of thickness variation processed；Just Magnification is 5～12mm/s, diameter end Magnification to diameter in this stage
For 5～12mm/s, radial feed speed be 0.15～0.4mm/s, axial feed speed be 0.04～0.2mm/s；
Deceleration rolling sequence：Radial and axial feed speed reduces, and looping mill rolling blank growth rate is decreased,
Deceleration rolling sequence rolling thickness value is the 10% of whole rolling thickness variable quantity；Increase at the beginning of diameter in this stage
Big rate be 5～12mm/s, diameter end Magnification be 1～5mm/s, radial feed speed be 0.05～
0.4mm/s, axial feed speed are 0.02～0.15mm/s；
The shaping full circle stage：Radial rolling is only carried out, is axially only rolled due to spreading that radial rolling causes,
Full circle is carried out during only radial rolling, while eliminating the scale error caused because of resilience, is shaped whole
Circle stage rolling thickness value is the 10% of whole rolling thickness variable quantity；Just Magnification is diameter in this stage
1～3mm/s, diameter end Magnification are 1～3mm/s, radial feed speed is 0.02～0.05mm/s, axle
It is 0～0.02mm/s to feed rate；
(3.3) carry out melting down 2～4h of insulation, holding temperature is 420～460 DEG C；
(3.4) second fire rollings：The core roller for changing a diameter of 700～900mm carries out roll off to looping mill rolling blank,
Roll off to external diameter is 8000～10000mm, is highly 400～550mm, and rolling ratio is 1.2～1.8, journal axle
It is 2.0～3.0 to the ratio of drafts；
The operation of rolling is identical with step (3.2), point bite stage, quick rolling sequence, the stable rolling stage,
Deceleration rolling sequence and shaping full circle stage, totally 5 stages were carried out：
Bite stage：Looping mill rolling blank nips roll gap, begins setting up the operation of rolling, and the stage only carries out radially rolling
System, axial roll are axially only rolled due to spreading that radial rolling causes without feeding, and bite stage rolling is thick
Angle value is the 5% of whole rolling thickness variable quantity；Just Magnification is 1～3mm/s, straight to diameter in this stage
Footpath end Magnification be 3～8mm/s, radial feed speed be 0.02～0.08mm/s, axial feed speed be 0～
0.02mm/s；
Quick rolling sequence：Roll radial feed speed is accelerated, looping mill rolling blank fast growth therewith, axially enters
To by the feeding proportional to radial feed, quick rolling sequence rolling thickness value changes for whole rolling thickness
The 15% of amount；This stage diameter just Magnification be 3～8mm/s, diameter end Magnification be 8～15mm/s,
Radial feed speed is 0.08～0.35mm/s, axial feed speed is 0.04～0.15mm/s；
The stable rolling stage：The feed speed of control core roller and cone roller so as to increase with the diameter of looping mill rolling blank
Speed matches, and the operation of rolling quickly, is stably carried out, and stable rolling stage rolling thickness value is entirely to roll
The 60% of amounts of thickness variation processed；Just Magnification is 8～15mm/s, diameter end Magnification to diameter in this stage
For 8～15mm/s, radial feed speed be 0.15～0.5mm/s, axial feed speed be 0.08～0.3mm/s；
Deceleration rolling sequence：Radial and axial feed speed reduces, and looping mill rolling blank growth rate is decreased,
Deceleration rolling sequence rolling thickness value is the 10% of whole rolling thickness variable quantity；Increase at the beginning of diameter in this stage
Big rate be 8～15mm/s, diameter end Magnification be 1～5mm/s, radial feed speed be 0.05～
0.5mm/s, axial feed speed are 0.02～0.2mm/s；
The shaping full circle stage：Radial rolling is only carried out, is axially only rolled due to spreading that radial rolling causes,
Full circle is carried out during only radial rolling, while eliminating the scale error caused because of resilience, is shaped whole
Circle stage rolling thickness value is the 10% of whole rolling thickness variable quantity；Just Magnification is diameter in this stage
1～3mm/s, diameter end Magnification are 1～3mm/s, radial feed speed is 0.02～0.05mm/s, axle
It is 0～0.02mm/s to feed rate；
(3.5) cooled down in enclosed environment after ring rolling terminates, in cooling procedure, controlled each position
Cooldown rate is consistent；
(4) size detection：Size detection is carried out to the ring of looping mill rolling shaping, acquisition meets the ring of prescription
Part.
Further, a kind of rolling production method of super-large diameter aluminium alloy integral loop as above, step
(2) in, looping mill rolling blank is put in electric furnace, using with stove heating mode, heating-up temperature is 420～460 DEG C,
Temperature retention time is 12～12.5h.
Further, a kind of rolling production method of super-large diameter aluminium alloy integral loop as above, step
(3), in, the operation of rolling is entered to 4 corner parts of king roller, core roller, upper cone roller, lower cone roller, ring billet
Row lubrication, controls each position lubricating uniform unanimously, controls the surface temperature of ring billet at 360～460 DEG C.
Further, a kind of rolling production method of super-large diameter aluminium alloy integral loop as above, step
(4), in, it is annular element circularity≤5 ‰ to the prescription that the annular element after Vehicle Processing carries out size detection.
Technical solution of the present invention adopts looping mill rolling forming technique, by the rolling for controlling super large-scale aluminium alloy ring
Deformation temperature, diameter increase speed, footpath axial direction feed rate, footpath axial direction drafts, rolling ratio, core roller are straight
Footpath, looping mill rolling fire are inferior, and realizing the stable of the super-large diameter aluminium alloy integral loop operation of rolling is persistently carried out, and is had
Effect controls ring dimensional accuracy, ovality and footpath axial deflection, improves product quality concordance and product
Product qualification rate, meets the technical requirement of product.
Specific embodiment
Technical solution of the present invention is described in detail with reference to specific embodiment.
A kind of rolling production method of super-large diameter aluminium alloy integral loop of the present invention, comprises the steps：
(1) prepared by ring billet：Needed for being prepared by free forging method, the ring billet of specification, machines and surpasses
Sonic flaw detection is detected, it is ensured that obtain qualified looping mill rolling blank；
Forging processing：Open die forging mode obtain external diameter for 3500～4500mm, internal diameter be 3000～3500mm,
It is highly the ring billet of 500～650mm；
Vehicle Processing：The upper and lower end face of ring billet and inside and outside disc are machined, surface casting skin and folding is removed
Folded wound, surface roughness reach more than Ra3.2, and roundness control is within 1mm；
Ultrasonic examination：100% ultrasonic examination is carried out to blank upper surface, by GJB2057 standard A levels
Check and accept, exclude excessive defect；
(2) ring billet heating：Looping mill rolling blank in electric furnace is carried out heating, is incubated；Preferred technical scheme is
Looping mill rolling blank is put in electric furnace, using with stove heating mode, heating-up temperature is 420～460 DEG C, during insulation
Between be 12～12.5h.
(3) looping mill rolling shaping：Two fiery secondary rings are carried out to looping mill rolling blank and rolls into shape；Including：
(3.1) transport：Looping mill rolling blank after heating is transported on looping mill, transhipment time is less than 290s,
Blank surface temperature drop is controlled within 40 DEG C；
(3.2) heating once and rollings：Roll off is carried out to looping mill rolling blank using the core roller of a diameter of 400～600mm,
The external diameter of roll off to looping mill rolling blank is 5000～6000mm, is highly 450～600mm, rolling than for 1.2～
2.0, the ratio of footpath axial direction drafts is 2.0～3.0；
The operation of rolling point bite stage, quick rolling sequence, the stable rolling stage, deceleration rolling sequence and into
The shape full circle stage, totally 5 stages were carried out：
Bite stage：Looping mill rolling blank nips roll gap, begins setting up the operation of rolling, and the stage only carries out radially rolling
System, axial roll are axially only rolled due to spreading that radial rolling causes without feeding, and bite stage rolling is thick
Angle value is the 5% of whole rolling thickness variable quantity；Just Magnification is 1～3mm/s, straight to diameter in this stage
Footpath end Magnification be 3～5mm/s, radial feed speed be 0.02～0.06mm/s, axial feed speed be 0～
0.02mm/s；
Quick rolling sequence：Roll radial feed speed is accelerated, looping mill rolling blank fast growth therewith, axially enters
To by the feeding proportional to radial feed, quick rolling sequence rolling thickness value changes for whole rolling thickness
The 15% of amount；This stage diameter just Magnification be 3～5mm/s, diameter end Magnification be 5～12mm/s,
Radial feed speed is 0.06～0.3mm/s, axial feed speed is 0.02～0.15mm/s；
The stable rolling stage：The feed speed of control core roller and cone roller so as to increase with the diameter of looping mill rolling blank
Speed matches, and the operation of rolling quickly, is stably carried out, and stable rolling stage rolling thickness value is entirely to roll
The 60% of amounts of thickness variation processed；Just Magnification is 5～12mm/s, diameter end Magnification to diameter in this stage
For 5～12mm/s, radial feed speed be 0.15～0.4mm/s, axial feed speed be 0.04～0.2mm/s；
Deceleration rolling sequence：Radial and axial feed speed reduces, and looping mill rolling blank growth rate is decreased,
Deceleration rolling sequence rolling thickness value is the 10% of whole rolling thickness variable quantity；Increase at the beginning of diameter in this stage
Big rate be 5～12mm/s, diameter end Magnification be 1～5mm/s, radial feed speed be 0.05～
0.4mm/s, axial feed speed are 0.02～0.15mm/s；
The shaping full circle stage：Radial rolling is only carried out, is axially only rolled due to spreading that radial rolling causes,
Full circle is carried out during only radial rolling, while eliminating the scale error caused because of resilience, is shaped whole
Circle stage rolling thickness value is the 10% of whole rolling thickness variable quantity；Just Magnification is diameter in this stage
1～3mm/s, diameter end Magnification are 1～3mm/s, radial feed speed is 0.02～0.05mm/s, axle
It is 0～0.02mm/s to feed rate；
(3.3) carry out melting down 2～4h of insulation, holding temperature is 420～460 DEG C；
(3.4) second fire rollings：The core roller for changing a diameter of 700～900mm carries out roll off to looping mill rolling blank,
Roll off to external diameter is 8000～10000mm, is highly 400～550mm, and rolling ratio is 1.2～1.8, journal axle
It is 2.0～3.0 to the ratio of drafts；
The operation of rolling is identical with step (3.2), point bite stage, quick rolling sequence, the stable rolling stage,
Deceleration rolling sequence and shaping full circle stage, totally 5 stages were carried out：
Bite stage：Looping mill rolling blank nips roll gap, begins setting up the operation of rolling, and the stage only carries out radially rolling
System, axial roll are axially only rolled due to spreading that radial rolling causes without feeding, and bite stage rolling is thick
Angle value is the 5% of whole rolling thickness variable quantity；Just Magnification is 1～3mm/s, straight to diameter in this stage
Footpath end Magnification be 3～8mm/s, radial feed speed be 0.02～0.08mm/s, axial feed speed be 0～
0.02mm/s；
Quick rolling sequence：Roll radial feed speed is accelerated, looping mill rolling blank fast growth therewith, axially enters
To by the feeding proportional to radial feed, quick rolling sequence rolling thickness value changes for whole rolling thickness
The 15% of amount；This stage diameter just Magnification be 3～8mm/s, diameter end Magnification be 8～15mm/s,
Radial feed speed is 0.08～0.35mm/s, axial feed speed is 0.04～0.15mm/s；
The stable rolling stage：The feed speed of control core roller and cone roller so as to increase with the diameter of looping mill rolling blank
Speed matches, and the operation of rolling quickly, is stably carried out, and stable rolling stage rolling thickness value is entirely to roll
The 60% of amounts of thickness variation processed；Just Magnification is 8～15mm/s, diameter end Magnification to diameter in this stage
For 8～15mm/s, radial feed speed be 0.15～0.5mm/s, axial feed speed be 0.08～0.3mm/s；
Deceleration rolling sequence：Radial and axial feed speed reduces, and looping mill rolling blank growth rate is decreased,
Deceleration rolling sequence rolling thickness value is the 10% of whole rolling thickness variable quantity；Increase at the beginning of diameter in this stage
Big rate be 8～15mm/s, diameter end Magnification be 1～5mm/s, radial feed speed be 0.05～
0.5mm/s, axial feed speed are 0.02～0.2mm/s；
The shaping full circle stage：Radial rolling is only carried out, is axially only rolled due to spreading that radial rolling causes,
Full circle is carried out during only radial rolling, while eliminating the scale error caused because of resilience, is shaped whole
Circle stage rolling thickness value is the 10% of whole rolling thickness variable quantity；Just Magnification is diameter in this stage
1～3mm/s, diameter end Magnification are 1～3mm/s, radial feed speed is 0.02～0.05mm/s, axle
It is 0～0.02mm/s to feed rate；
(3.5) cooled down in enclosed environment after ring rolling terminates, in cooling procedure, controlled each position
Cooldown rate is consistent；
Preferred technical scheme be in step (3), the operation of rolling to king roller, core roller, upper cone roller, under
Cone roller, 4 corner parts of ring billet are lubricated, and control each position lubricating uniform unanimously, control ring billet
Surface temperature at 360～460 DEG C.
(4) size detection：Size detection is carried out to the ring of looping mill rolling shaping, acquisition meets the ring of prescription
Part.Specific is annular element circularity≤5 ‰ to the prescription that the annular element after Vehicle Processing carries out size detection.
Require in the overall operation of rolling that ring possesses certain integral rigidity and circularity, just can guarantee that the operation of rolling
It is smoothed out.The integral rigidity of large diameter thin wall aluminium alloy annulus is very weak, and with ring instantaneous diameter
Increase and further reduce, operation of rolling posterior segment easily produces plastic instability and loses overall circularity, causes
The operation of rolling cannot continue, or the overproof generation waste product of ovality.The diameter of particularly ring is bigger, quality more
Weight, the stability of its operation of rolling are more difficult to control, and the control requirement to ring piece rolling technique is higher, therefore
The stability that looping mill rolling process is controlled on the basis of properties of product are ensured is the entirety ring-rolling of super-large diameter aluminium alloy
One key technology of production.Loop forming technological parameter to the ring forging operation of rolling be smoothed out and it is final into
Form quality amount has very important impact, it is therefore necessary to which the technological parameter in each stage of looping mill rolling shaping is carried out
Reasonably distribute and be accurately controlled.A kind of rolling life of super-large diameter aluminium alloy integral loop that the present invention is provided
Product method, solves the precise control of circularity and size in the super-large diameter aluminium alloy rings operation of rolling, rolls
The control of defects controlling processed and properties of product, realizes " shape-property " of super-large diameter aluminium alloy integral loop
Collaborative Control, meets the requirement of overall ring performance.
A kind of rolling of super-large diameter aluminium alloy integral loop of present invention offer is provided below by embodiment
Production method.
Embodiment 1
It is that 3965mm, internal diameter are 3224mm, are highly the looping mill rolling of 575mm that external diameter is prepared with flat-die forging mode
Blank, after Vehicle Processing Jing after flaw detection is qualified, is positioned in electric furnace with stove heat, heating-up temperature is 445 DEG C,
Temperature retention time 12h.
Looping mill rolling blank after heating is transferred to into looping mill the first fire ring is carried out using Φ 500mm cores rollers and rolled, roll over ring
To external diameter 5130mm, height 510mm, then which is carried out to melt down insulation, when 446 DEG C of holding temperature, insulation
Between 2.1h；Change 800 core rollers of Φ and carry out the second fire ring and roll, rolling technological parameter is as shown in the table, ring is rolled over to outer
Footpath 8760mm, internal diameter 8379mm, height 470mm, rolling technological parameter are as shown in the table.
Jing dimensional measurements, ring circularity are 19mm, less than 5 ‰, are met the technical requirements.
Embodiment 2
It is that 4100mm, internal diameter are 3300mm, highly carry out removing surface for the looping mill rolling blank of 550mm by external diameter
After flaw detection, it is positioned in electric furnace with stove heat, heating-up temperature is 440 DEG C, temperature retention time 12.2h.
Looping mill rolling blank after heating is transferred to into looping mill the first fire ring is carried out using Φ 500mm cores rollers and rolled, roll over ring
To external diameter 5800mm, height 500mm, then which is carried out to melt down insulation, when 446 DEG C of holding temperature, insulation
Between 2.1h；Change 800 core rollers of Φ and carry out the second fire ring and roll, rolling mill practice is as shown in the table, ring is rolled over to external diameter
9205mm, internal diameter 8812mm, height 460mm, rolling technological parameter are as shown in the table.
Jing dimensional measurements, ring circularity are 35mm, less than 5 ‰, are met the technical requirements.
Claims (4)
1. a kind of rolling production method of super-large diameter aluminium alloy integral loop, it is characterised in that comprise the steps：
(1) prepared by ring billet：Needed for being prepared by free forging method, the ring billet of specification, machines and surpasses
Sonic flaw detection is detected, it is ensured that obtain qualified looping mill rolling blank；
Forging processing：Open die forging mode obtain external diameter for 3500～4500mm, internal diameter be 3000～3500mm,
It is highly the ring billet of 500～650mm；
Vehicle Processing：The upper and lower end face of ring billet and inside and outside disc are machined, surface casting skin and folding is removed
Folded wound, surface roughness reach more than Ra3.2, and roundness control is within 1mm；
Ultrasonic examination：100% ultrasonic examination is carried out to blank upper surface, by GJB2057 standard A levels
Check and accept, exclude excessive defect；
(2) ring billet heating：Looping mill rolling blank in electric furnace is carried out heating, is incubated；
(3) looping mill rolling shaping：Two fiery secondary rings are carried out to looping mill rolling blank and rolls into shape；Including：
(3.1) transport：Looping mill rolling blank after heating is transported on looping mill, transhipment time is less than 290s,
Blank surface temperature drop is controlled within 40 DEG C；
(3.2) heating once and rollings：Roll off is carried out to looping mill rolling blank using the core roller of a diameter of 400～600mm,
The external diameter of roll off to looping mill rolling blank is 5000～6000mm, is highly 450～600mm, rolling than for 1.2～
2.0, the ratio of footpath axial direction drafts is 2.0～3.0；
The operation of rolling point bite stage, quick rolling sequence, the stable rolling stage, deceleration rolling sequence and into
The shape full circle stage, totally 5 stages were carried out：
Bite stage：Looping mill rolling blank nips roll gap, begins setting up the operation of rolling, and the stage only carries out radially rolling
System, axial roll are axially only rolled due to spreading that radial rolling causes without feeding, and bite stage rolling is thick
Angle value is the 5% of whole rolling thickness variable quantity；Just Magnification is 1～3mm/s, straight to diameter in this stage
Footpath end Magnification be 3～5mm/s, radial feed speed be 0.02～0.06mm/s, axial feed speed be 0～
0.02mm/s；
Quick rolling sequence：Roll radial feed speed is accelerated, looping mill rolling blank fast growth therewith, axially enters
To by the feeding proportional to radial feed, quick rolling sequence rolling thickness value changes for whole rolling thickness
The 15% of amount；This stage diameter just Magnification be 3～5mm/s, diameter end Magnification be 5～12mm/s,
Radial feed speed is 0.06～0.3mm/s, axial feed speed is 0.02～0.15mm/s；
The stable rolling stage：The feed speed of control core roller and cone roller so as to increase with the diameter of looping mill rolling blank
Speed matches, and the operation of rolling quickly, is stably carried out, and stable rolling stage rolling thickness value is entirely to roll
The 60% of amounts of thickness variation processed；Just Magnification is 5～12mm/s, diameter end Magnification to diameter in this stage
For 5～12mm/s, radial feed speed be 0.15～0.4mm/s, axial feed speed be 0.04～0.2mm/s；
Deceleration rolling sequence：Radial and axial feed speed reduces, and looping mill rolling blank growth rate is decreased,
Deceleration rolling sequence rolling thickness value is the 10% of whole rolling thickness variable quantity；Increase at the beginning of diameter in this stage
Big rate be 5～12mm/s, diameter end Magnification be 1～5mm/s, radial feed speed be 0.05～
0.4mm/s, axial feed speed are 0.02～0.15mm/s；
The shaping full circle stage：Radial rolling is only carried out, is axially only rolled due to spreading that radial rolling causes,
Full circle is carried out during only radial rolling, while eliminating the scale error caused because of resilience, is shaped whole
Circle stage rolling thickness value is the 10% of whole rolling thickness variable quantity；Just Magnification is diameter in this stage
1～3mm/s, diameter end Magnification are 1～3mm/s, radial feed speed is 0.02～0.05mm/s, axle
It is 0～0.02mm/s to feed rate；
(3.3) carry out melting down 2～4h of insulation, holding temperature is 420～460 DEG C；
(3.4) second fire rollings：The core roller for changing a diameter of 700～900mm carries out roll off to looping mill rolling blank,
Roll off to external diameter is 8000～10000mm, is highly 400～550mm, and rolling ratio is 1.2～1.8, journal axle
It is 2.0～3.0 to the ratio of drafts；
The operation of rolling is identical with step (3.2), point bite stage, quick rolling sequence, the stable rolling stage,
Deceleration rolling sequence and shaping full circle stage, totally 5 stages were carried out：
Bite stage：Looping mill rolling blank nips roll gap, begins setting up the operation of rolling, and the stage only carries out radially rolling
System, axial roll are axially only rolled due to spreading that radial rolling causes without feeding, and bite stage rolling is thick
Angle value is the 5% of whole rolling thickness variable quantity；Just Magnification is 1～3mm/s, straight to diameter in this stage
Footpath end Magnification be 3～8mm/s, radial feed speed be 0.02～0.08mm/s, axial feed speed be 0～
0.02mm/s；
Quick rolling sequence：Roll radial feed speed is accelerated, looping mill rolling blank fast growth therewith, axially enters
To by the feeding proportional to radial feed, quick rolling sequence rolling thickness value changes for whole rolling thickness
The 15% of amount；This stage diameter just Magnification be 3～8mm/s, diameter end Magnification be 8～15mm/s,
Radial feed speed is 0.08～0.35mm/s, axial feed speed is 0.04～0.15mm/s；
The stable rolling stage：The feed speed of control core roller and cone roller so as to increase with the diameter of looping mill rolling blank
Speed matches, and the operation of rolling quickly, is stably carried out, and stable rolling stage rolling thickness value is entirely to roll
The 60% of amounts of thickness variation processed；Just Magnification is 8～15mm/s, diameter end Magnification to diameter in this stage
For 8～15mm/s, radial feed speed be 0.15～0.5mm/s, axial feed speed be 0.08～0.3mm/s；
Deceleration rolling sequence：Radial and axial feed speed reduces, and looping mill rolling blank growth rate is decreased,
Deceleration rolling sequence rolling thickness value is the 10% of whole rolling thickness variable quantity；Increase at the beginning of diameter in this stage
Big rate be 8～15mm/s, diameter end Magnification be 1～5mm/s, radial feed speed be 0.05～
0.5mm/s, axial feed speed are 0.02～0.2mm/s；
The shaping full circle stage：Radial rolling is only carried out, is axially only rolled due to spreading that radial rolling causes,
Full circle is carried out during only radial rolling, while eliminating the scale error caused because of resilience, is shaped whole
Circle stage rolling thickness value is the 10% of whole rolling thickness variable quantity；Just Magnification is diameter in this stage
1～3mm/s, diameter end Magnification are 1～3mm/s, radial feed speed is 0.02～0.05mm/s, axle
It is 0～0.02mm/s to feed rate；
(3.5) cooled down in enclosed environment after ring rolling terminates, in cooling procedure, controlled each position
Cooldown rate is consistent；
(4) size detection：Size detection is carried out to the ring of looping mill rolling shaping, acquisition meets the ring of prescription
Part.
2. a kind of rolling production method of super-large diameter aluminium alloy integral loop as claimed in claim 1, its feature
It is：In step (2), looping mill rolling blank is put in electric furnace, using with stove heating mode, heating-up temperature is
420～460 DEG C, temperature retention time is 12～12.5h.
3. a kind of rolling production method of super-large diameter aluminium alloy integral loop as claimed in claim 1, its feature
It is：In step (3), the operation of rolling to king roller, core roller, upper cone roller, lower cone roller, 4 of ring billet
Corner part is lubricated, and controls that each position lubricating uniform is consistent, control the surface temperature of ring billet 360～
460℃。
4. a kind of rolling production method of super-large diameter aluminium alloy integral loop as claimed in claim 1, its feature
It is：In step (4), it is annular element circle to the prescription that the annular element after Vehicle Processing carries out size detection
Degree≤5 ‰.
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| CN108363848A (en) * | 2018-01-31 | 2018-08-03 | 西北工业大学 | The design method of looping mill rolling process ring diameter coarsening rate based on temperature control |
| CN108642410A (en) * | 2018-05-16 | 2018-10-12 | 江苏理工学院 | A kind of process improving aluminum alloy plate materials comprehensive mechanical property |
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| CN112122515B (en) * | 2020-07-30 | 2022-11-11 | 伊莱特能源装备股份有限公司 | Process for rolling and shaping ultra-large integral ring forging |
| CN112828214A (en) * | 2020-12-12 | 2021-05-25 | 天津理工大学 | Large 2219 aluminum alloy ring homogenizing rolling process |
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