CN106903244B - A kind of hot rolling forming method of centrifugal casting bi-metal double abnormity ring - Google Patents
A kind of hot rolling forming method of centrifugal casting bi-metal double abnormity ring Download PDFInfo
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- CN106903244B CN106903244B CN201710264730.6A CN201710264730A CN106903244B CN 106903244 B CN106903244 B CN 106903244B CN 201710264730 A CN201710264730 A CN 201710264730A CN 106903244 B CN106903244 B CN 106903244B
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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
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Abstract
A kind of hot rolling forming method of centrifugal casting bi-metal double abnormity ring, belongs to ring processing technique field, it is characterised in that comprise the following steps that：（1）According to the size of duplex-metal special ring, rolling ratio is calculatedKWith the size of ring billet；（2）Rolling hole type design：Using enclosed pass rolling, driven roller is the cylindrical roller that middle part carries outer step, and core roller is that middle part carries upper and lower outer step, is taper cylinder between upper and lower outer step, the tangent conjunction of between outer land terrace of driven roller and core roller forms forming cavity；（3）Rolling forming is processed：The internal layer Q345B of centrifugal casting, outer layer 40Cr bimetallic ring billets are heated, determine ring billet internal layer, outer layer initial temperature and driven roller rotating speed and core roller variable-speed feeding speed speed, when internal layer temperature is down to 820 ~ 850 DEG C, rolling terminates.The method have the advantages that equipment investment is small, and energy-saving material-saving, the inside and outside layer interface bond strength height of duplex-metal special ring.
Description
Technical field
The invention belongs to ring processing technique fields, and in particular to a kind of hot rolling of centrifugal casting bi-metal double abnormity ring at
Shape method.
Background technology
Duplex-metal special ring refers to that the material of outer surface or inner surface is different, the irregular special-shaped ring of cross sectional shape
Part, the internal layer N of ring shown in Fig. 1 is different with material used in outer layer W, and the inner surface of ring internal layer has gradient, complex-shaped,
Possessed physics, chemistry and mechanical property are all more more advantageous than single ferrule piece, become replacing for valuable monometallic ring
For product, it is widely used in industrial circles such as the severe petrochemical industry of service condition, the energy and aerospaces.Engineering is led
The Key basic parts such as the common Double flange track roller body in domain, concrete mixer truck supporting guide, bilateral flange and smash valve body are equal
Belong to duplex-metal special ring, to the more demanding of the performance qualities such as its dimensional accuracy, structure stability and wearability.
Currently, the production method of such duplex-metal special ring is mainly first prefabricated into two using forging, punching operation
Monometallic rectangle cross-section ring die forging base, then fit together with one heart, using Ring Rolling Machine make its generate wall thickness reduce, enlarged-diameter
Continuous local plastic deforms, and obtains the bimetallic rectangular section ring forging with certain mass performance, is then cut by machinery
Cut process ring internal layer inner surface have certain gradient shape.The shortcomings that above method is that ring internal layer can be caused circumferential
Metallic fiber streamline is destroyed during the cutting process, and structure property deteriorates, and seriously reduces its service life；Also, current
In production method, base is difficult before rolling, and forging, punching operation equipment investment are big, and material is serious with energy waste, production efficiency
It is low.
Invention content
The object of the present invention is to provide a kind of hot rolling forming methods of centrifugal casting bi-metal double abnormity ring, can be effectively
Overcome disadvantage of the existing technology.
The object of the present invention is achieved like this, it is characterised in that processing step is as follows：
(1) according to the size of duplex-metal special ring, the size of ring billet is designed：
Fig. 1 show the sizing figure of duplex-metal special ring, in figure：D is the outer diameter of special-shaped ring, d1For special-shaped ring
The internal diameter of part, D1For the diameter of special-shaped ring internal layer and outer layer faying face, H is the axial height of special-shaped ring, and α is special-shaped ring
The volume at the inclination angle of inner wall, special-shaped ring is：
Fig. 2 show the sizing figure of bimetallic ring billet, ring billet rectangular cross-section section, in figure：D0For ring billet outer diameter,
d0For ring billet internal diameter, D01For the diameter of ring billet internal layer and outer layer faying face, H0For the axial height of ring billet, rolling ratio K=is calculated
[(d1+2Htanα)-150]/d0, the value range of K is 1.8~2.4, according to the front and back constancy of volume principle of rolling deformation, ring billet
Axial height be：
Ring billet internal diameter：d0=[(d1+2Htanα)-150]/K
Ring billet outer diameter：
The diameter of ring billet internal layer and outer layer faying face：D01=(D0+d0)/2
(2) rolling hole type design：
Fig. 3 show duplex-metal special ring rolling schematic diagram, and driven roller 1 is the cylindrical roller that middle part carries outer step 5.1,
Core roller 2 is that middle part carries upper and lower outer step 6.1,6.2, is taper cylinder, driven roller 1 and core roller 2 between upper and lower outer step
The tangent conjunction of between outer land terrace forms rolling forming chamber 7, the height H of driven roller outer step 5.1qWith the height H of forming cavity 7XIt is equal, i.e.,
Hq=HX=H+3~5mm, H are the axial height of forging special-shape ring, and driven roller 1 and 7 radius of forming cavity of core roller 2 should meet：(1/
RX1+1/Rq)≤1.75θ/H0, RX1For radius at core roller forming cavity big end, RqFor 5.1 radius of driven roller outer step, θ=tan-1μ
For angle of friction, μ is friction coefficient, and the value range of μ is 0.5~0.7, RX1、RqAccording to wall thickness reduction amount Δ h=[(D0-d0)-
(D-(d1+ 2Htan α))]/2 and rolling process bite condition It is saturating with forging
ConditionRelationship be determined, core roller outer step diameterThe upper and lower inner wall angle with horizontal plane β of core roller forming cavity 7 is 4 °~8 °；
(3) rolling forming is processed：
1. being heated to the internal layer Q345B using centre spinning method manufacture, outer layer 40Cr bimetallics ring billet 4, outer layer
Heating temperature is 1180~1230 DEG C, 12~15h of soaking time；
2. the ring billet 4 of heating is placed on enclosed Ring Rolling Machine, as shown in figure 3, the outer surface of 1 outer step 5.1 of driven roller
Circumscribed with 4 outer surface of ring billet, 7 inclined-plane of forming cavity of core roller 2 is contacted with the inner surface of ring billet 4；
3. initial rolling temperature is that 4 internal layer N ' temperature of ring billet is 1160~1180 DEG C, outer layer W ' temperature is 1170~1200
℃；
Ring billet 4 and core roller 2 is driven to rotate 4. starting driven roller 1,1 rotating speed of driven roller is 24.7~27.8r/min,
Meanwhile core roller 2 is moved to driven roller 1 as variable-speed feeding speed along 4 radial thickness direction of ring billet：First, 2 feed speed of core roller is
3.0~3.5mm/s, 10~15s of time complete internal layer bevel edge forming 70%；Then, 2 feed speed of core roller is 2.0~2.5mm/
S, 20~30s of time complete internal layer bevel edge forming 95% and ring forging section overall dimension forming 85%；Finally, core roller 2 is fed
Speed is 1.0~1.5mm/s, 10~15s of time, completes all sectional dimension forming of ring forging；It should be held during rolling
Continue the ring billet 4 in the forming cavity 7 between driven roller 1 and core roller 2 and spray high-pressure cooling water, water temperature is 25~30 DEG C, when internal layer temperature
It when degree is down to 820~850 DEG C, shuts down, rolling terminates, and duplex-metal special ring forging is air-cooled to room temperature, and air blower wind pressure is
1815~1674Pa, flow are 4520~5820m3/h。
Advantages of the present invention and good effect：The stabilization of duplex-metal special ring rolling process may be implemented using the present invention
The rational design with technological parameter is carried out, the appearance and size of ring is accurate, and the inside and outside layer interface of duplex-metal special ring combines strong
Degree is high, and interior tissue performance quality is good, improves and rolles over ring yield rate, avoids the waste of material caused by machining, saves
Equipment investment, reduces energy consumption.
Description of the drawings
Fig. 1 is the sizing figure of duplex-metal special ring.
Fig. 2 is the sizing figure of bimetallic ring billet.
Fig. 3 is duplex-metal special ring rolling schematic diagram.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is A-A sectional views in Fig. 4.
In figure：The internal layer W ' of outer layer N-abnormity ring of W-abnormity ring-ring billet outer layer N '-ring billet internal layer
1-driven roller 2-core roller 3-guide roller, 4-ring billet, 5-driven roller cross section 5.1-driven roller outer step 6-core roller
Cross section 6.1, the upper and lower 7-forming cavity of outer step of 6.2-core rollers
The outer diameter of D-abnormity ring, D1The diameter of-abnormity ring internal layer and outer layer faying face, the axis of H-abnormity ring
To height, d1The internal diameter of-abnormity ring, the inclination angle of α-abnormity ring inner wall, D0- ring billet outer diameter, D01- ring billet internal layer with
The diameter of outer layer faying face, H0The axial height of-ring billet, d0- ring billet internal diameter, Dq- driven roller outer step diameter, Rq- driving
Roller outer step radius, Hq- driven roller outer step height, dq- driving roller diameter, DX- core roller outer step diameter, dXOn-core roller
Lower end diameter, RX1Radius at-core roller forming cavity big end, HX- core roller forming cavity height, β-core roller forming cavity it is upper and lower in
Wall angle with horizontal plane
Specific implementation mode
Fig. 1 show the sizing figure of duplex-metal special ring, outer diameter D=1850mm of special-shaped ring, special-shaped ring
The diameter D of internal layer and outer layer faying face1=1800mm, the internal diameter d of special-shaped ring1=1670mm, the axial height H of special-shaped ring
=95mm, slanted angle α=10 ° of special-shaped ring inner wall；Carrying out the processing step of hot rolling forming is：As shown in Fig. 1~5,
(1) according to the size of duplex-metal special ring, the size of ring billet is designed：
Fig. 1 show the sizing figure of duplex-metal special ring, in figure：D is the outer diameter of special-shaped ring, d1For special-shaped ring
The internal diameter of part, D1For the diameter of special-shaped ring internal layer and outer layer faying face, H is the axial height of special-shaped ring, and α is special-shaped ring
The volume at the inclination angle of inner wall, special-shaped ring is：
Fig. 2 show the sizing figure of bimetallic ring billet, ring billet rectangular cross-section section, in figure：D0For ring billet outer diameter,
d0For ring billet internal diameter, D01For the diameter of ring billet internal layer and outer layer faying face, H0For the axial height of ring billet, rolling ratio K=is calculated
[(d1+2Htanα)-150]/d0, it is 2.0 to take K, and according to the front and back constancy of volume principle of rolling deformation, the axial height of ring billet is：
Ring billet internal diameter：d0=[(d1+ 2Htan α) -150]/K=780mm
Ring billet outer diameter：
The diameter of ring billet internal layer and outer layer faying face：D01=(D0+d0)/2=920mm
(2) rolling hole type design：
Fig. 3 show duplex-metal special ring rolling schematic diagram, and driven roller 1 is the cylindrical roller that middle part carries outer step 5.1,
Core roller 2 is that middle part carries upper and lower outer step 6.1,6.2, is taper cylinder, driven roller 1 and core roller 2 between upper and lower outer step
The tangent conjunction of between outer land terrace, rolling is at forming cavity 7, the height H of driven roller outer step 5.1qWith the height H of core roller forming cavity 7XIt is equal,
That is Hq=HX=H+3~5mm=100mm, H are the axial height of special-shaped ring, and driven roller 1 and 7 radius of forming cavity of core roller 2 are answered
Meet：(1/RX1+1/Rq)≤1.75θ/H0, RX1For radius at core roller forming cavity big end, RqFor driven roller outer step radius, θ=
tan-1μ is angle of friction, and μ is friction coefficient, value 0.7, RX1、RqAccording to wall thickness reduction amount Δ h=[(D0-d0)-(D-(d1+
2Htan α))]/2 and rolling process bite condition With the saturating condition of forgingRelationship be determined, calculate RX1=90mm, Rq=
240mm；Core roller outer step diameterThe upper and lower inner wall of forming cavity 7 with
Horizontal plane angle β is 4 °；
(3) rolling forming is processed：
1. being heated to the internal layer Q345B using centre spinning method manufacture, outer layer 40Cr ring billets 4, outer layer heating temperature
Degree is 1180 DEG C, soaking time 12h；
2. the ring billet 4 of heating is placed on enclosed Ring Rolling Machine, as shown in figure 3, the outer surface of 1 outer step 5.1 of driven roller
Circumscribed with 4 outer surface of ring billet, 7 inclined-plane of forming cavity of core roller 2 is contacted with the inner surface of ring billet 4；
3. initial rolling temperature is that 4 internal layer N ' temperature of ring billet is 1160 DEG C, outer layer W ' temperature is 1170 DEG C；
Ring billet 4 and core roller 2 is driven to rotate 4. starting driven roller 1,1 rotating speed of driven roller is 24.7r/min, meanwhile,
Core roller 2 is moved to driven roller 1 as variable-speed feeding speed along 4 radial thickness direction of ring billet：First, 2 feed speed of core roller is 3.0mm/
S, time 10s complete internal layer bevel edge forming 70%；Then, 2 feed speed of core roller is 2.0mm/s, time 25s, and it is oblique to complete internal layer
Side forming 95% and ring section overall dimension forming 85%；Finally, 2 feed speed of core roller is 1.2mm/s, time 10s, is completed
All sectional dimension forming of ring；It should continue the ring in the forming cavity 7 between driven roller 1 and core roller 2 during rolling
Base 4 sprays high-pressure cooling water, and water temperature is 30 DEG C, when internal layer temperature is down to 820 DEG C, shuts down, rolling terminates, by duplex-metal special ring
Part is air-cooled to room temperature, and air blower wind pressure is 1815Pa, flow 4520m3/h。
Claims (1)
1. a kind of hot rolling forming method of centrifugal casting bi-metal double abnormity ring, it is characterised in that processing step is as follows：
(1) according to the size of duplex-metal special ring, the size of ring billet is designed：
If D is the outer diameter of special-shaped ring, d1For the internal diameter of special-shaped ring, D1For the diameter of special-shaped ring internal layer and outer layer faying face,
H is the axial height of special-shaped ring, and α is the inclination angle of special-shaped ring inner wall, and the volume of special-shaped ring is：
Ring billet rectangular cross-section section, if D0For ring billet outer diameter, d0For ring billet internal diameter, D01For ring billet internal layer and outer layer faying face
Diameter, H0For the axial height of ring billet, rolling ratio K=[(d are calculated1+2H tanα)-150]/d0, the value range of K is 1.8~
2.4, according to the front and back constancy of volume principle of rolling deformation, the axial height of ring billet is：
Ring billet internal diameter：d0=[(d1+2H tanα)-150]/K
Ring billet outer diameter：
The diameter of ring billet internal layer and outer layer faying face：D01=(D0+d0)/2
(2) rolling hole type design：
Driven roller (1) be middle part carry outer step (5.1) cylindrical roller, core roller (2) be middle part with upper and lower outer step (6.1,
6.2), between upper and lower outer step be taper cylinder, the tangent conjunction of between outer land terrace of driven roller (1) and core roller (2), rolling formation at
Shape chamber (7), the height H of driven roller outer step (5.1)qWith the height H of forming cavity (7)XIt is equal, i.e. Hq=HX=H+3~5mm, H
For the axial height of forging special-shape ring, driven roller (1) and forming cavity (7) radius of core roller (2) should meet：(1/RX1+1/Rq)≤
1.75θ/H0, RX1For radius at core roller forming cavity big end, RqFor driven roller outer step (5.1) radius, θ=tan-1μ is angle of friction,
μ is friction coefficient, and the value range of μ is 0.5~0.7, RX1、RqAccording to wall thickness reduction amount Δ h=[(D0-d0)-(D-(d1+2H
Tan α))]/2 and rolling process bite conditionWith the saturating condition Δ h of forging
≥Relationship be determined, core roller outer step diameterThe upper and lower inner wall angle with horizontal plane β of forming cavity (7) is 4 °~8 °；
(3) rolling forming is processed：
1. being heated to the internal layer Q345B using centre spinning method manufacture, outer layer 40Cr ring billets (4), outer layer heating temperature
It is 1180~1230 DEG C, 12~15h of soaking time；
2. the ring billet (4) of heating is placed on enclosed Ring Rolling Machine, outer surface and the ring billet (4) of driven roller (1) outer step (5.1)
Outer surface is circumscribed, and forming cavity (7) inclined-plane of core roller (2) is contacted with the inner surface of ring billet (4)；
3. it is 1160~1180 DEG C that initial rolling temperature, which is ring billet (4) internal layer N ' temperature, outer layer W ' temperature is 1170~1200 DEG C；
Ring billet (4) and core roller (2) is driven to rotate 4. starting driven roller (1), driven roller (1) rotating speed is 24.7~27.8r/
Min, meanwhile, core roller (2) is made variable-speed feeding speed to driven roller (1) along ring billet (4) radial thickness direction and is moved：First, core roller (2)
Feed speed is 3.0~3.5mm/s, 10~15s of time, completes internal layer bevel edge forming 70%；Then, core roller (2) feed speed
For 2.0~2.5mm/s, 20~30s of time, internal layer bevel edge forming 95% and ring forging section overall dimension forming 85% are completed；
Finally, core roller (2) feed speed is 1.0~1.5mm/s, 10~15s of time, completes all sectional dimension formings of ring forging and adds
Work；It should continue ring billet (4) the spray high pressure cooling in the forming cavity (7) between driven roller (1) and core roller (2) during rolling
Water, water temperature is 25~30 DEG C, when internal layer temperature is down to 820~850 DEG C, is shut down, rolling terminates, by duplex-metal special ring wind
It is cooled to room temperature, air blower wind pressure is 1815~1674Pa, and flow is 4520~5820m3/h。
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| CN201710264730.6A CN106903244B (en) | 2017-04-21 | 2017-04-21 | A kind of hot rolling forming method of centrifugal casting bi-metal double abnormity ring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4082684A4 (en) * | 2019-12-25 | 2023-06-14 | Proterial, Ltd. | Method of manufacturing ring-rolled element |
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| CN109332561A (en) * | 2018-09-21 | 2019-02-15 | 桂林理工大学 | A kind of determination method of the hot rolling blank dimension of centrifugal casting bi-metal double ring |
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| CN112475806B (en) * | 2020-11-20 | 2022-04-08 | 西安航天发动机有限公司 | QCr0.8 alloy large-size conical-cylindrical ring forming process |
| CN112935168A (en) * | 2021-01-28 | 2021-06-11 | 伊莱特能源装备股份有限公司 | Special-shaped bumper, core roller die and ring rolling forming process of inner step gear forging die |
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| JP2003010938A (en) * | 2001-06-28 | 2003-01-15 | Nippon Spindle Mfg Co Ltd | Rolling forming apparatus for ring body |
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Effective date of registration: 20180816 Address after: 541004 the Guangxi Zhuang Autonomous Region Guilin City Seven Star District Building Road No. 12 Co-patentee after: Taiyuan Univ. of Science & Technology Patentee after: Guilin University of Technology Address before: 541004 1 Guilin, the Guangxi Zhuang Autonomous Region Co-patentee before: Taiyuan Univ. of Science & Technology Patentee before: Guilin University of Electronic Technology |
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