CN106825358A - A kind of new V anvils and the forging method using the V anvils - Google Patents
A kind of new V anvils and the forging method using the V anvils Download PDFInfo
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- CN106825358A CN106825358A CN201710002051.1A CN201710002051A CN106825358A CN 106825358 A CN106825358 A CN 106825358A CN 201710002051 A CN201710002051 A CN 201710002051A CN 106825358 A CN106825358 A CN 106825358A
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- anvils
- anvil
- steel ingot
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/06—Hammers tups; Anvils; Anvil blocks
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Abstract
The present invention relates to a kind of new V anvils and the forging method using the V anvils.The new V anvils include upper flat anvil (1), lower V anvils (2) and mandrel (3), wherein lower V anvils (2) includes great circle angle-style V anvils and convex V anvil two types.θ is that the angle between two inclined-planes of great circle angle-style V anvils or convex V anvils is beak iron, and R is great circle angle-style V anvil radius, R0It is hollow steel ingot radius, 0.8≤R/R0≤ 1.2, RcIt is the convex radius of corner of convex V anvils, 0.3≤Rc/R0≤ 0.5, r are the radius between inclined-plane and convex hollows, and W is that anvil is wide, r=0.1W.Fullering with the core bar is carried out using new V anvils of the invention, upset forging process can be saved, effectively shortened technological process, realized small forging ratio forging, effectively eliminate that shrinkage cavity inside hollow steel ingot is loose, refine original coarse grain and improve crystal grain uniformity coefficient.
Description
Technical field
The invention belongs to forging equipment and forging technology field, especially, it is related to a kind of new V anvils and uses the new V
The forging method of anvil.
Background technology
With the continuous improvement of security and service life, the quality of large forgings and forging require improving constantly.Such as
Certain 700MW grades of large-scale water turbine hollow spindle forging requires higher in terms of mechanical property：Yield strength >=295MPa, fracture
Intensity >=480MPa.Hydraulic turbine hollow spindle forging is typical heavy cylindrical forging.Large-scale cylinder is produced relative to solid steel ingot
Body forging, is had the advantage that using hollow steel ingot：Steel ingot utilization rate can be significantly improved；Punching operation can be saved；It is inside and outside while cold
But setting rate is improve, segregation can be reduced；Existing equipment working ability can be improved.However, because heavy cylindrical forging is used
Large-sized hollow steel ingot size and tonnage all than larger, shrinkage cavity, loose and thick is inevitably present inside large-sized hollow steel ingot
The defects such as big crystal grain.
The defect inside large-sized hollow steel ingot is eliminated to ensure the quality of heavy cylindrical forging except enough abilities should be equipped with
Forging equipment outside, it is important to particularly effective swage block should be used.The conventional wrought processes of large-sized hollow steel ingot are first time upsetting
Slightly, lower V anvils fullering with the core bar, second jumping-up and second upper flat lower V anvil fullering with the core bar are put down on first time.Because mandrel is pulled out twice
Lower V anvils are common V anvils in length, there is larger gap between lower V anvils and steel ingot lower surface, and the consolidation effect of steel ingot is poor, forging
A number of shrinkage cavity, rarefaction defect are still suffered from inside steel ingot afterwards, and crystal grain is thicker；Additionally, upper flat lower V anvil fullerings with the core bar
When, the deformation of V anvils side is relatively small, and large deformation area is concentrated between flat anvil and mandrel at mandrel, the steel particularly above V anvils
The deformation of ingot undersurface layer is minimum, and the deformation uniformity of final hollow steel ingot circular section is poor, and the uniformity coefficient of crystal grain is relatively low.
A kind of patent of invention " semi-closed frock for forging hollow main nuclear power pipeline " (application number
201210078229.8) forging of main nuclear power pipeline, is can be effectively used for, can makes that its tube wall deformation is uniform to make its crystal grain refinement,
But the frock is complex, and enhancing consolidation effect is not accounted for eliminate shrinkage cavity rarefaction defect.
The content of the invention
It is upper flat lower V anvils it is an object of the invention to provide a kind of new V anvils, including upper flat anvil 1, lower V anvils 2 and mandrel
3, fullering with the core bar is carried out to hollow steel ingot 4, lower V anvils 2 include great circle angle-style V anvils and convex V anvils；The working face of great circle angle-style V anvils
Respectively left tilted surface 201, right tilted surface 202 and transition circle edged surface 203；The working face of convex V anvils is respectively left tilted surface 201, the right side tiltedly
Face 202, convex hollows 204, left transition circle edged surface 205 and right transition circle edged surface 206.
Preferably, θ as the angle i.e. anvil between great circle angle-style V anvils and convex V anvils left tilted surface 201 and right tilted surface 202 is set
Angle, θ is 100-140 °, and the angle of left tilted surface 201 and vertical direction, right tilted surface 202 are identical with the angle of vertical direction, be θ/
2。
Preferably, R as the radius of transition circle edged surface 203, R are set0It is the external diameter of hollow steel ingot 4, R meets 0.8≤R/R0≤
1.2。
Preferably, R is setcIt is the radius of convex hollows 204, R0It is the external diameter of hollow steel ingot 4, RcMeet 0.3≤Rc/R0
≤0.5；R as left transition circle edged surface 205 or the radius of right transition circle edged surface 206 is set, W is that anvil is wide, and r meets r=0.1W.
Preferably, beak iron θ is 120 °, R/R0=1.0, Rc/R0=0.4.
The present invention also aims to provide a kind of forging method using new V anvils, mainly include the following steps that,
First, fullering with the core bar is carried out to hollow steel ingot 4 using upper flat lower V anvils, lower V anvils 2 use great circle angle-style V anvils, reduction ratio
It is 10%~25%, anvil width ratio is 0.6-0.9, flip angle is 20-25 °；10-20 pulling is completed, every time using full anvil
Enter anvil mode；
2nd, chamfered edge, round as a ball, jumping-up treatment are carried out to hollow steel ingot, upset ratio is 1.5-2.5；
3rd, fullering with the core bar is carried out to hollow steel ingot 4 using upper flat lower V anvils, lower V anvils 2 use convex V anvils, and reduction ratio is 9%
~15%, anvil width ratio is 0.6-0.9, and flip angle is 15-20 °；15-25 pulling is completed, anvil side is entered using full anvil every time
Formula；
4th, chamfered edge, ball process are carried out, finished product is forged.
Preferably, the reduction ratio in above-mentioned steps one is 15%, and anvil width ratio is 0.75, and flip angle is 22.5 °；Complete 16
Secondary pulling；
Preferably, the upset ratio in above-mentioned steps two is 2；
Preferably, the reduction ratio in above-mentioned steps three is 11%, and anvil width ratio is 0.75, and flip angle is 17.14 °；Complete
21 pullings.
Beneficial effects of the present invention are：
(1) when carrying out fullering with the core bar using Rouno Cormer Pregrinding Wheel V anvils, the gap between Rouno Cormer Pregrinding Wheel V anvils and hollow steel ingot lower surface reduces,
The transition circle edged surface of Rouno Cormer Pregrinding Wheel V anvils makes the constricted flow of hollow steel ingot lower surface material, and hollow steel ingot inside can obtain bigger
Equivalent strain and more powerful hydrostatic pressure, are conducive to the shrinkage cavity rarefaction defect inside compacting soldering hollow steel ingot and promote material
There is complete dynamic recrystallization and form tiny equiax crystal.
(2) when carrying out fullering with the core bar using convex V anvils, the convex hollows of convex V anvils can be significantly increased under hollow steel ingot
The deformation of superficial layer and reduction hollow steel ingot undersurface layer equivalent strain and the gap of other positions equivalent strain, are greatly improved list
The deformation uniformity of anvil pulling, is conducive to improving crystal grain uniformity coefficient.
(3) during the heavy cylindrical forging such as hydraulic turbine hollow spindle first time fullering with the core bar, lower V anvils use Rouno Cormer Pregrinding Wheel V anvil energy
Significantly increase the loose compacting soldering effect of hollow steel ingot internal shrinkage and promote material that complete dynamic recrystallization occurs and formed carefully
Small equiax crystal, can save first time upset forging process, be consumed so as to save energy reduction.
(4) during second fullering with the core bar of heavy cylindrical forging such as hydraulic turbine hollow spindle, lower V anvils use convex V anvil energy pole
The earth improves the deformation uniformity of single anvil pulling, and this is conducive to improving crystal grain uniformity coefficient.
Brief description of the drawings
Fig. 1 is a kind of transverse cross-sectional view of new V anvils of the invention；
Fig. 2 is a kind of longitudinal sectional drawing of new V anvils of the invention；
Fig. 3 is a kind of transverse cross-sectional view of the fillet V anvils of new V anvils of the invention；
Fig. 4 is a kind of transverse cross-sectional view of the convex V anvils of new V anvils of the invention.
In figure, 1-upper flat anvil, 2-lower V anvils, 201-left tilted surface, 202-right tilted surface, 203-transition circle edged surface, 204-
Convex hollows, 205-left transition circle edged surface, 206-right transition circle edged surface, 3-mandrel, 4-hollow steel ingot.
Specific embodiment
To make the purpose, technical scheme and advantage of present invention implementation clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is further described in more detail.Described embodiment is the present invention one
Section Example, rather than whole embodiments.Embodiment below with reference to Description of Drawings is exemplary, it is intended to be used for
The present invention is explained, and is not considered as limiting the invention.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.Below
Embodiments of the invention are described in detail with reference to accompanying drawing.
In accompanying drawing, R is the radius of transition circle edged surface 203, R0It is the external diameter of hollow steel ingot 4, RcIt is convex hollows 204
Radius, r is the radius of left transition circle edged surface 205 or right transition circle edged surface 206, and θ is between left tilted surface 201 and right tilted surface 202
Angle is beak iron, and W is that anvil is wide.
As illustrated in fig. 1 and 2, new V anvils include upper flat anvil 1, lower V anvils 2 and mandrel 3, and fullering with the core bar is carried out to hollow steel ingot 4
Forging process.Wherein, lower V anvils 2 of the invention include great circle angle-style V anvils and convex V anvil two types.
As shown in figure 3, great circle angle-style V anvils of the invention, its working face is respectively left tilted surface 201, right tilted surface 202 and transition
Hollows 203.The angle of the left tilted surface 201 and vertical direction, the right tilted surface 202 are identical with the angle of vertical direction,
It is θ/2, θ is 100-140 °.The radius R of transition circle edged surface 203 meets 0.8≤R/R0≤1.2.Transition circle edged surface 203 can make V anvils
The constricted flow of the lower surface of top hollow steel ingot 4, so that the inside of hollow steel ingot 4 can obtain bigger equivalent strain and stronger
Big hydrostatic pressure, can effectively eliminate the coarse grain that shrinkage cavity is loose and refinement is original inside hollow steel ingot.
As shown in figure 4, convex V anvils of the invention, its working face is respectively left tilted surface 201, right tilted surface 202, convex fillet
Face 204, left transition circle edged surface 205 and right transition circle edged surface 206.The angle of the left tilted surface 201 and vertical direction, the right side are tiltedly
Face 202 is identical with the angle of vertical direction, is θ/2, and θ is 100-140 °.The radius R of convex hollows 204cSatisfaction 0.3≤
Rc/R0≤0.5.The radius r of the radius r of left transition circle edged surface 205 and right transition circle edged surface 206 is satisfied by r=0.1W, and W is anvil
It is wide.Convex hollows 204 can make the inside of hollow steel ingot 4 and superficial layer can obtain larger equivalent strain, raising pulling
Deformation uniformity, reduces mixed crystal and occurs, and improves crystal grain uniformity coefficient.
Present invention also offers a kind of forging method using new V anvils, mainly include the following steps that：
First, fullering with the core bar is carried out to hollow steel ingot 4 using upper flat lower V anvils, lower V anvils 2 are using great circle angle-style V anvils, beak iron θ
100-140 °, 0.8≤R/R0≤ 1.2, reduction ratio is 10%~25%, and anvil width ratio is 0.6-0.9, and flip angle is 20-25 °；
10-20 pulling is completed, anvil mode is entered using full anvil every time；
2nd, chamfered edge, round as a ball, jumping-up treatment are carried out to hollow steel ingot, upset ratio is 1.5-2.5；
3rd, fullering with the core bar is carried out to hollow steel ingot 4 using upper flat lower V anvils, lower V anvils 2 use convex V anvils, and beak iron θ is 100-
140 °, 0.3≤Rc/R0≤ 0.5, reduction ratio is 9%~15%, and anvil width ratio is 0.6-0.9, and flip angle is 15-20 °；Complete
15-25 pulling, enters anvil mode using full anvil every time；
4th, chamfered edge, ball process are carried out, finished product is forged.
It is exemplified below.Certain 700MW grades of hollow spindle forging of large-scale water turbine, forging external diameter 4000mm is adopted
Hollow steel ingot size is Φ 3600mm × Φ 1200mm × 3600mm.
Forging method step using new V anvils is as follows：
First, fullering with the core bar is carried out to hollow steel ingot using upper flat lower V anvils, lower V anvils 2 are using great circle angle-style V anvils, beak iron θ
120 °, R/R0=1.0, reduction ratio is 15%, and anvil width ratio is 0.75, and flip angle is 22.5 °；16 pullings are completed, every time
Anvil mode is entered using full anvil；
2nd, chamfered edge, round as a ball, jumping-up treatment are carried out to hollow steel ingot, upset ratio is 2；
3rd, fullering with the core bar is carried out to hollow steel ingot using upper flat lower V anvils, lower V anvils 2 use convex V anvils, and beak iron θ is 120 °,
Rc/R0=0.4, reduction ratio is 11%, and anvil width ratio is 0.75, and flip angle is 17.14 °；21 pullings are completed, is used every time
Full anvil enters anvil mode；
4th, chamfered edge, ball process are carried out, finished product is forged.
It is last it is to be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent
Pipe has been described in detail to the present invention with reference to the foregoing embodiments, it will be understood by those within the art that：It is still
Technical scheme described in foregoing embodiments can be modified, or which part technical characteristic is equally replaced
Change；And these modifications or replacement, do not make the essence of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution
God and scope.
Claims (8)
1. a kind of new V anvils, are upper flat lower V anvils, including upper flat anvil (1), lower V anvils (2) and mandrel (3), and hollow steel ingot (4) is entered
Row fullering with the core bar, it is characterised in that
Lower V anvils (2) include great circle angle-style V anvils and convex V anvils；
The working face of great circle angle-style V anvils is respectively left tilted surface (201), right tilted surface (202) and transition circle edged surface (203)；
The working face of convex V anvils is respectively left tilted surface (201), right tilted surface (202), convex hollows (204), left transition circle edged surface
And right transition circle edged surface (206) (205).
2. new V anvils according to claim 1, it is characterised in that set θ as great circle angle-style V anvils and convex V anvil left tilted surfaces
(201) angle and between right tilted surface (202) is beak iron, and θ is 100-140 °；Angle, the right side of left tilted surface (201) and vertical direction
Inclined-plane (202) is identical with the angle of vertical direction, is θ/2.
3. new V anvils according to claim 2, it is characterised in that set R as the radius of transition circle edged surface (203), R0For
The external diameter of hollow steel ingot (4), R meets 0.8≤R/R0≤1.2。
4. new V anvils according to claim 2, it is characterised in that setting RcIt is the radius of convex hollows (204), R0For
The external diameter of hollow steel ingot (4), RcMeet 0.3≤Rc/R0≤0.5；Set r as left transition circle edged surface (205) or right transition circle edged surface
(206) radius, W is that anvil is wide, and r meets r=0.1W.
5. V anvils according to claim 3, it is characterised in that beak iron θ is 120 °, R/R0=1.0.
6. V anvils according to claim 4, it is characterised in that beak iron θ is 120 °, Rc/R0=0.4.
7. the forging method of the new V anvils as described in claim any one of 1-6 is used, it is characterised in that mainly including following
Step,
First, fullering with the core bar is carried out to hollow steel ingot (4) using upper flat lower V anvils, lower V anvils (2) use great circle angle-style V anvils, reduction ratio
It is 10%~25%, anvil width ratio is 0.6-0.9, flip angle is 20-25 °；10-20 pulling is completed, every time using full anvil
Enter anvil mode；
2nd, chamfered edge, round as a ball, jumping-up treatment are carried out to hollow steel ingot, upset ratio is 1.5-2.5；
3rd, fullering with the core bar is carried out to hollow steel ingot (4) using upper flat lower V anvils, lower V anvils (2) use convex V anvils, and reduction ratio is 9%
~15%, anvil width ratio is 0.6-0.9, and flip angle is 15-20 °；15-25 pulling is completed, anvil side is entered using full anvil every time
Formula；
4th, chamfered edge, ball process are carried out, finished product is forged.
8. forging method according to claim 7, it is characterised in that mainly include the following steps that,
First, fullering with the core bar is carried out to hollow steel ingot using upper flat lower V anvils, lower V anvils (2) are using great circle angle-style V anvils, reduction ratio
15%, anvil width ratio is 0.75, and flip angle is 22.5 °；16 pullings are completed, anvil mode is entered using full anvil every time；
2nd, chamfered edge, round as a ball, jumping-up treatment are carried out to hollow steel ingot, upset ratio is 2；
3rd, fullering with the core bar is carried out to hollow steel ingot using upper flat lower V anvils, lower V anvils (2) use convex V anvils, and reduction ratio is 11%,
Anvil width ratio is 0.75, and flip angle is 17.14 °；21 pullings are completed, anvil mode is entered using full anvil every time；
4th, chamfered edge, ball process are carried out, finished product is forged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710002051.1A CN106825358A (en) | 2017-01-03 | 2017-01-03 | A kind of new V anvils and the forging method using the V anvils |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710002051.1A CN106825358A (en) | 2017-01-03 | 2017-01-03 | A kind of new V anvils and the forging method using the V anvils |
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| CN201710002051.1A Pending CN106825358A (en) | 2017-01-03 | 2017-01-03 | A kind of new V anvils and the forging method using the V anvils |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238337A (en) * | 2019-07-01 | 2019-09-17 | 山东大学 | Control the operating method of large hollow part fullering with the core bar inner hole defect |
| CN111842748A (en) * | 2020-07-10 | 2020-10-30 | 陕西华威科技股份有限公司 | Forging method of low-plasticity steel forging |
| CN115635037A (en) * | 2022-11-16 | 2023-01-24 | 山西大原机电科技有限公司 | Round forging die |
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|---|---|---|---|---|
| CN110238337A (en) * | 2019-07-01 | 2019-09-17 | 山东大学 | Control the operating method of large hollow part fullering with the core bar inner hole defect |
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| CN115635037A (en) * | 2022-11-16 | 2023-01-24 | 山西大原机电科技有限公司 | Round forging die |
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