CN109351896A - A kind of milling method of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter - Google Patents
A kind of milling method of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter Download PDFInfo
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- CN109351896A CN109351896A CN201811354838.5A CN201811354838A CN109351896A CN 109351896 A CN109351896 A CN 109351896A CN 201811354838 A CN201811354838 A CN 201811354838A CN 109351896 A CN109351896 A CN 109351896A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
Abstract
The present invention relates to ring rolling method field, a kind of milling method of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter is as follows: blanking → ingot casting heating, heat preservation → open die forging → rectangle ring billet production → ring with odd-shaped cross section production → ring cooling → solid solution → ageing treatment → size detection.It is able to maintain that forging streamline is complete, and interior tissue is uniform using milling method of the present invention, does not need to be welded, the features such as process-cycle is short, and stock utilization is high, and following process surplus is small.
Description
Technical field
The invention belongs to ring rolling method field, especially a kind of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter
Milling method.
Background technique
6061 aluminium alloys are A1-Mg-Si system heat-treatable strengthened aluminum alloy, have low-density, higher specific strength, good
The characteristics such as good corrosion resistance, weldability, processability, are used widely in fields such as aerospace, automobile, ships.Big type ring
Part is widely applied and each industrial circle, such as the excessive ring of carrier rocket, the stiffening ring of nuclear reactor, pressure vessel etc..
Ring Rolling Technology & is a kind of Special Working Technology for producing seamless ring, domestic at present to close in ferrous metal and titanium
Research is more in terms of metal looping mill rolling, and engineering application is higher, but in aluminium alloy rings, especially ultra-large type odd-shaped cross section aluminium
Alloy looping mill rolling research aspect is almost nil.Main cause is less to the requirement of aluminium alloy ring with odd-shaped cross section.But with
The development of aerospace industry, ultra-large type aluminium alloy rings use demand it is more and more.Domestic production aluminium alloy rings at present
Substantially all in 10000mm hereinafter, the size with ring increases, the rigidity of ring can weaken significantly, lead in the operation of rolling diameter
The problems such as cause plastic instability, the circularity and dimensional accuracy of looping mill rolling process middle ring are difficult to control, because the operation of rolling is more complex, to rolling
More stringent requirements are proposed for technical process.
Summary of the invention
The present invention provides a kind of milling methods of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter, mainly solve diameter
The problem of aluminium alloy rings of 10000mm or more can not roll.
In order to solve the above-mentioned technical problem, the technical scheme is that a kind of 6061 aluminium alloy abnormity of super-large diameter is cut
The milling method of face ring part, comprising the following steps:
(1) 6061 aluminium alloy cast ingots are sawed into ingot casting by blanking as required；
(2) ingot casting heating, heat preservation；
(3) flat-die forging carries out jumping-up, punching, saddle support reaming process to 6061 aluminium alloy cast ingots；
The ingot casting upsetting pull of heating, heat preservation is forged into round pie blank first, then blank is punched out, is returned after the completion of punching
Furnace is warming up to 470 ± 5 DEG C, heat preservation 4-6 hour, finally carries out saddle support reaming to blank, prepares outer diameter as 4750-5250mm, interior
Diameter is 3750-4250mm, is highly the ring billet of 520-530mm；
(4) rectangle ring billet makes, and ring billet made from (3) step is melted down and is warming up to 470 ± 5 DEG C, heat preservation 2-3 hours, then
Ring billet is transported to the production that rectangle ring is carried out on rectangle looping mill, milling step is as follows: bite stage controls home roll mold
Revolving speed is 2-3rad/s, core roller mould feed speed is 0.5-0.8mm/s, cone roller mold feed speed is 0, quick rolling sequence
Control home roll mold revolving speed is 3-4rad/s, core roller mould feed speed is 1-1.5mm/s, cone roller mold feed speed is
0.45-0.5mm/s, stable rolling stage control home roll mold revolving speed is 3.5-4.5rad/s, core roller mould feed speed is
1.5-2.5mm/s, cone roller mold feed speed are 0.15-0.2mm/s, and it is 1.5- that deceleration rolling sequence, which controls home roll mold revolving speed,
2mm/s, core roller mould feed speed are 1-2mm/s, cone roller mold feed speed is 0.1-0.15mm/s, the control of forming full circle stage
Home roll mold revolving speed processed is 1-1.5rad/s, core roller mould feed speed is 0.1-0.3mm/s, cone roller mold feed speed is 0,
Obtained outer diameter is 7800-8300mm, internal diameter 7200-7700mm, be highly 500 ± 5mm rectangle ring billet；
(5) ring with odd-shaped cross section make, steps are as follows: rectangle ring billet made from (4) step is melted down be warming up to 470 ± 5 DEG C,
Then rectangle ring billet is transported to the production that ring with odd-shaped cross section is carried out on special-shaped looping mill by heat preservation 2-3 hours, milling step is such as
Under: bite stage control home roll mold revolving speed is 1-2rad/s, core roller mould feed speed is 0.3-0.8mm/s, fast speed rolling
Stage control home roll mold revolving speed is 2-2.5rad/s, core roller mould feed speed is 0.8-1.2mm/s, the control of stable rolling stage
Home roll mold revolving speed processed is 3-4rad/s, core roller mould feed speed is 1-1.6mm/s, and deceleration rolling sequence controls home roll mold
Revolving speed is 1.2-1.5mm/s, core roller mould feed speed is 0.8-1.3mm/s, shapes full circle stage control home roll mold revolving speed
For 1-1.5rad/s, core roller mould feed speed be 0.1-0.3mm/s, be rolled into ring with odd-shaped cross section, ring outer diameter is
11000 ± 15mm, internal diameter are 10600 ± 15mm, are highly 500 ± 5mm；
(6) it after ring rolling, lays flat and is air-cooled to room temperature；
(7) be dissolved: the solid solubility temperature of ring is 535 ± 5 DEG C, keeps the temperature 5-7 hours；
(8) ring: being fitted into heat-treatment furnace by ageing treatment again, is heated to 160 ± 3 DEG C, keeps the temperature 8-10 hours, air-cooled；
(9) size detection carries out size detection to ring with odd-shaped cross section, and odd-shaped cross section ring forging circularity is met less than 5 ‰
The ring of quality requirement.
Above-mentioned technical proposal is further limited, less than 2.5, cast ingot dimension is blanking ratio of height to diameter in the step (1)
Diameter 1150mm, height 2800mm.
Above-mentioned technical proposal is further limited, in the step (2), ingot casting is put into heat temperature raising in electric furnace, furnace temperature
At 470 ± 5 DEG C, soaking time is 20-24 hours for control.
Above-mentioned technical proposal is further limited, in the step (3), punching internal diameter is 500mm, jumping-up, punching, horse
The temperature of frame reaming is 380 DEG C -470 DEG C.
Above-mentioned technical proposal is further limited, in the step (4), the rectangle ring billet circularity of production is rolled less than 5 ‰
The temperature on rectangle ring billet surface is 380 DEG C -470 DEG C during system.
Above-mentioned technical proposal is further limited, in the step (5), production ring with odd-shaped cross section Preform surface temperature is
380℃-470℃。
Above-mentioned technical proposal is further limited, in the step (7), ring with odd-shaped cross section enters water time requirement and is less than
15 seconds, solid solution water temperature was 25-35 DEG C.
The utility model has the advantages that the present invention for rolling super-large diameter ring with odd-shaped cross section, passes through base during control open die forging
Expect deformation temperature, size；Ring billet temperature, axis-radial feed movement speed, size in the rectangle ring billet operation of rolling；Abnormity is cut
Temperature, radial feed speed, size in the face ring part operation of rolling；Temperature, soaking time in heat treatment process etc. allow whole
A operation of rolling stablize it is lasting carry out, realize 6061 aluminium alloys manufacture outer diameter be 11000 ± 15mm, internal diameter be 10600 ± 15mm,
Height is the super-large diameter ring with odd-shaped cross section of 500 ± 5mm；It is complete that forging streamline is able to maintain using milling method of the present invention
The features such as whole, interior tissue is uniform, does not need to be welded, and the process-cycle is short, and stock utilization is high, and following process surplus is small.
Detailed description of the invention
Fig. 1 is that rectangle ring billet makes schematic diagram in the present invention.
Fig. 2 is that ring with odd-shaped cross section makes schematic diagram in the present invention.
1 is home roll mold in figure, and 2 be ring billet, and 3 be guide roller, and 4 be core roller mould, and 5 cone rollers, 6 be ring.
Specific embodiment
A kind of milling method of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter, comprising the following steps:
(1) blanking, blanking ratio of height to diameter are sawed into ingot casting less than 2.5, by 6061 aluminium alloy cast ingots as required, and cast ingot dimension is diameter
1150mm, height 2800mm；
(2) ingot casting is put into heat temperature raising in electric furnace, and for Control for Kiln Temperature at 470 DEG C, soaking time is 22 hours；
(3) flat-die forging carries out jumping-up, punching, saddle support reaming process to 6061 aluminium alloy cast ingots；
The ingot casting upsetting pull of heating, heat preservation is forged into round pie blank first, then blank is punched out, punching internal diameter is
500mm melts down after the completion of punching and is warming up to 470 DEG C, heat preservation 5 hours, finally carries out saddle support reaming to blank, preparing outer diameter is
5000mm, internal diameter 4000mm, be highly 525mm ring billet；The jumping-up, punching, saddle support reaming temperature be 450 DEG C；
(4) rectangle ring billet makes, and ring billet made from (3) step is melted down and is warming up to 470 DEG C, heat preservation 2 hours, then by ring billet
It is transported to the production that rectangle ring is carried out on rectangle looping mill, milling step is as follows: equipment frock applies lubricant, to ring billet table
Face, inner hole spray lubricant, and the operation of rolling point bites, fast speed rolling, stable rolling, slows down rolling and forming five stages of full circle
It carries out；Home roll mold, the technological parameter of core roller mould in five stages is as follows: as shown in Figure 1, bite stage controls home roll mould
Tool revolving speed is 2-3rad/s, core roller mould feed speed is 0.5-0.8mm/s, cone roller mold feed speed is 0, fast speed rolling rank
Section control home roll mold revolving speed is 3-4rad/s, core roller mould feed speed is 1-1.5mm/s, cone roller mold feed speed is
0.45mm/s, stable rolling stage control home roll mold revolving speed is 3.5-4.5rad/s, core roller mould feed speed is 1.5-
2.5mm/s, cone roller mold feed speed are 0.15mm/s, and it is 1.5-2mm/s, core that deceleration rolling sequence, which controls home roll mold revolving speed,
Roller mould feed speed is 1-2mm/s, cone roller mold feed speed is 0.1mm/s, and forming full circle stage control home roll mold turns
Speed is 1-1.5rad/s, core roller mould feed speed is 0.1-0.3mm/s, cone roller mold feed speed is 0, and obtained outer diameter is
7800-8300mm, internal diameter 7200-7700mm, be highly 500 ± 5mm rectangle ring billet；
(5) ring with odd-shaped cross section makes, and steps are as follows: rectangle ring billet made from (4) step being melted down and is warming up to 470 DEG C, protects
Then rectangle ring billet is transported to the production that ring with odd-shaped cross section is carried out on special-shaped looping mill by temperature 2 hours, milling step is as follows:
Equipment frock applies lubricant, sprays lubricant to ring billet surface, inner hole, the operation of rolling point bites, fast speed rolling, stable rolling,
Slow down and rolls and shape five stages progress of full circle；Home roll mold, the technological parameter of core roller mould in five stages is as follows: such as
Shown in Fig. 2, bite stage control home roll mold revolving speed is 1rad/s, core roller mould feed speed is 0.3mm/s, fast speed rolling rank
Section control home roll mold revolving speed is 2rad/s, core roller mould feed speed is 0.8mm/s, stable rolling stage control home roll mold
Revolving speed is 3rad/s, core roller mould feed speed is 1mm/s, and it is 1.2mm/s, core that deceleration rolling sequence, which controls home roll mold revolving speed,
Roller mould feed speed is 0.8mm/s, and forming full circle stage control home roll mold revolving speed is 1rad/s, the feeding of core roller mould it is fast
Degree is 0.1mm/s, as shown in Fig. 2, be rolled into ring with odd-shaped cross section, ring outer diameter is 11000mm, internal diameter 10600mm, height
For 500mm；Making ring with odd-shaped cross section Preform surface temperature is 470 DEG C；
(6) it after ring rolling, lays flat and is air-cooled to room temperature；
(7) be dissolved: ring with odd-shaped cross section entered water time requirement less than 15 seconds, and solid solution water temperature is 25-35 DEG C, the solid solubility temperature of ring
It is 535 DEG C, keeps the temperature 5 hours；Solid solubility temperature refers to that the temperature of ring, water temperature are medium temperatures；
(8) ring: being fitted into heat-treatment furnace by ageing treatment again, is heated to 160 DEG C, keeps the temperature 8 hours, air-cooled；
(9) size detection carries out size detection to ring with odd-shaped cross section, and odd-shaped cross section ring forging circularity is met less than 5 ‰
The ring of quality requirement.
Rectangle ring billet described in this specification refers to the cross section of ring billet in rectangle；The ring with odd-shaped cross section refers to ring
Cross section be unconventional shape, be similar to "] [" shape, i.e., be formed on the inside and outside anchor ring of ring cross section in abnormity
Annular groove.
The present invention by roll 6061 aluminium alloy of super-large diameter "] [for " tee section ring, by control open die forging during
Blank deformation temperature, size；Ring billet temperature, axis-radial feed movement speed, size in the rectangle ring billet operation of rolling；"]["
Temperature, shaft-radial feed speed, size during tee section ring rolling；Temperature, soaking time in heat treatment process
Deng allowing the entire operation of rolling to stablize lasting carry out.The present invention can roll streamline is complete, interior tissue uniformly, circularity less than 5 ‰,
11000 ± 15mm of outer diameter, 10600 ± 15mm of internal diameter, the highly super-large diameter of 500 ± 5mm "] [6061 aluminum alloy ring of " tee section
Part, it is necessary to have following innovative point: 1) in technique each step innovation parameter；2) it rolls twice: in the production of rectangle ring billet
The height for first determining ring billet can save the axial feed motion in ring with odd-shaped cross section production, to reduce forming ring in this way
Dependent variable excessively leads to the underproof problem of product in section；3) ultra-large type produced by the present invention "] [" tee section ring manufactured
Journey reduces mach process, and stock utilization is high.Raw material size is bigger, and casting stability is poorer, and ring quality can not
Guarantee, and the saving of raw material, it can effectively avoid because of metallurgical imperfection caused by ingot casting is excessive.
Do not elaborate place in this specification, is common sense well known in the art.
Claims (7)
1. a kind of milling method of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter, comprising the following steps:
(1) 6061 aluminium alloy cast ingots are sawed into ingot casting by blanking as required；
(2) ingot casting heating, heat preservation；
(3) flat-die forging carries out jumping-up, punching, saddle support reaming process to 6061 aluminium alloy cast ingots；
The ingot casting upsetting pull of heating, heat preservation is forged into round pie blank first, then blank is punched out, is returned after the completion of punching
Furnace is warming up to 470 ± 5 DEG C, heat preservation 4-6 hour, finally carries out saddle support reaming to blank, prepares outer diameter as 4750-5250mm, interior
Diameter is 3750-4250mm, is highly the ring billet of 520-530mm；
(4) rectangle ring billet makes, and ring billet made from (3) step is melted down and is warming up to 470 ± 5 DEG C, heat preservation 2-3 hours, then
Ring billet is transported to the production that rectangle ring is carried out on rectangle looping mill, milling step is as follows: bite stage controls home roll mold
Revolving speed is 2-3rad/s, core roller mould feed speed is 0.5-0.8mm/s, cone roller mold feed speed is 0, quick rolling sequence
Control home roll mold revolving speed is 3-4rad/s, core roller mould feed speed is 1-1.5mm/s, cone roller mold feed speed is
0.45-0.5mm/s, stable rolling stage control home roll mold revolving speed is 3.5-4.5rad/s, core roller mould feed speed is
1.5-2.5mm/s, cone roller mold feed speed are 0.15-0.2mm/s, and it is 1.5- that deceleration rolling sequence, which controls home roll mold revolving speed,
2mm/s, core roller mould feed speed are 1-2mm/s, cone roller mold feed speed is 0.1-0.15mm/s, the control of forming full circle stage
Home roll mold revolving speed processed is 1-1.5rad/s, core roller mould feed speed is 0.1-0.3mm/s, cone roller mold feed speed is 0,
Obtained outer diameter is 7800-8300mm, internal diameter 7200-7700mm, be highly 500 ± 5mm rectangle ring billet；
(5) ring with odd-shaped cross section make, steps are as follows: rectangle ring billet made from (4) step is melted down be warming up to 470 ± 5 DEG C,
Then rectangle ring billet is transported to the production that ring with odd-shaped cross section is carried out on special-shaped looping mill by heat preservation 2-3 hours, milling step is such as
Under: bite stage control home roll mold revolving speed is 1-2rad/s, core roller mould feed speed is 0.3-0.8mm/s, fast speed rolling
Stage control home roll mold revolving speed is 2-2.5rad/s, core roller mould feed speed is 0.8-1.2mm/s, the control of stable rolling stage
Home roll mold revolving speed processed is 3-4rad/s, core roller mould feed speed is 1-1.6mm/s, and deceleration rolling sequence controls home roll mold
Revolving speed is 1.2-1.5mm/s, core roller mould feed speed is 0.8-1.3mm/s, shapes full circle stage control home roll mold revolving speed
For 1-1.5rad/s, core roller mould feed speed be 0.1-0.3mm/s, be rolled into ring with odd-shaped cross section, ring outer diameter is
11000 ± 15mm, internal diameter are 10600 ± 15mm, are highly 500 ± 5mm；
(6) it after ring rolling, lays flat and is air-cooled to room temperature；
(7) it is dissolved: 535 ± 5 DEG C of solid solubility temperature, keeping the temperature 5-7 hours；
(8) ring: being fitted into heat-treatment furnace by ageing treatment again, is heated to 160 ± 3 DEG C, keeps the temperature 8-10h, air-cooled；
(9) size detection carries out size detection to ring with odd-shaped cross section, and odd-shaped cross section ring forging circularity is met less than 5 ‰
The ring of quality requirement.
2. a kind of milling method of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter according to claim 1, feature
Be: for blanking ratio of height to diameter less than 2.5, cast ingot dimension is diameter 1150mm, height 2800mm in the step (1).
3. a kind of milling method of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter according to claim 1 or 2, special
Sign is: in the step (2), ingot casting is put into heat temperature raising in electric furnace, and Control for Kiln Temperature is at 470 ± 5 DEG C, soaking time 20-
24 hours.
4. a kind of milling method of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter according to claim 3, feature
Be: in the step (3), punching internal diameter be 500mm, jumping-up, punching, saddle support reaming temperature be 380 DEG C -470 DEG C.
5. a kind of milling method of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter according to claim 1 or 2 or 4,
It is characterized by: the rectangle ring billet circularity of production is less than 5 ‰, the temperature on rectangle ring billet surface in the operation of rolling in the step (4)
Degree is 380 DEG C -470 DEG C.
6. a kind of milling method of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter according to claim 5, feature
Be: in the step (5), production ring with odd-shaped cross section Preform surface temperature is 380 DEG C -470 DEG C.
7. a kind of rolling side of 6061 aluminium alloy ring with odd-shaped cross section of super-large diameter described according to claim 1 or 2 or 4 or 6
Method, it is characterised in that: in the step (7), ring with odd-shaped cross section entered water time requirement less than 15 seconds, and solid solution water temperature is 25-35
℃。
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| CN201811354838.5A CN109351896B (en) | 2018-11-14 | 2018-11-14 | Rolling method of 6061 aluminum alloy special-shaped section ring piece with ultra-large diameter |
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| CN110653328A (en) * | 2019-06-03 | 2020-01-07 | 遵义航天新力精密铸锻有限公司 | Processing technology of inner lug special-shaped cover |
| CN111673022A (en) * | 2020-06-19 | 2020-09-18 | 中国船舶重工集团公司第七二五研究所 | Copper-nickel alloy flange rolling forming method |
| CN113416872A (en) * | 2021-05-27 | 2021-09-21 | 江苏豪然喷射成形合金有限公司 | High-strength high-toughness aluminum lithium alloy for aerospace and preparation method thereof |
| CN114192708A (en) * | 2021-12-15 | 2022-03-18 | 武汉理工大学 | Hot rolling forming method for large aluminum alloy ring piece construction |
| CN115430801A (en) * | 2022-11-09 | 2022-12-06 | 无锡派克新材料科技股份有限公司 | Integral forming method for axial special-shaped ring forging |
| CN115608891A (en) * | 2022-09-30 | 2023-01-17 | 中南大学 | Method and device for manufacturing special-shaped section transition ring of rocket tank |
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| CN115608891A (en) * | 2022-09-30 | 2023-01-17 | 中南大学 | Method and device for manufacturing special-shaped section transition ring of rocket tank |
| CN115430801A (en) * | 2022-11-09 | 2022-12-06 | 无锡派克新材料科技股份有限公司 | Integral forming method for axial special-shaped ring forging |
| CN115430801B (en) * | 2022-11-09 | 2023-02-10 | 无锡派克新材料科技股份有限公司 | Integral forming method for axial special-shaped ring forging |
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