CN106180506B - A kind of GH4169 stator blades closed die forging method - Google Patents
A kind of GH4169 stator blades closed die forging method Download PDFInfo
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- CN106180506B CN106180506B CN201610752950.9A CN201610752950A CN106180506B CN 106180506 B CN106180506 B CN 106180506B CN 201610752950 A CN201610752950 A CN 201610752950A CN 106180506 B CN106180506 B CN 106180506B
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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
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/025—Closed die forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K3/00—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like
- B21K3/04—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like blades, e.g. for turbines; Upsetting of blade roots
Abstract
The invention discloses a kind of GH4169 stator blades closed die forging method, it is therefore intended that, simplification of flowsheet is cost-effective, while ensures part performance, and used technical scheme is：Leaf basin type face, blade back type face, the cross sectional shape of forging and the forging length of forging are designed respectively according to stator blade part, then closed molds are designed according to the shape of forging, upper model cavity is according to forging leaf basin quasi spline, drag chamber is according to forging blade back quasi spline, and upper mould height of projection and lower mould are recessed highly identical, upper mould boss and the fitting of lower mould groove two sides side wall；By the diameter and length that calculate GH4169 blanks, make blank specification suitable, and combine design of the closed molds without flash, avoid the excessive mold damage of specification, or the too small forging of specification can not be full of the problem of mould, blank was forged to obtain forging after entering heating and thermal insulation, and forging obtains GH4169 stator blades after removing surface and heat treatment.
Description
Technical field
The invention belongs to technical field of forging, and in particular to a kind of GH4169 stator blades closed die forging method.
Background technology
GH4169 materials are widely used in engine of new generation, especially blade parts, and these parts need logical
Forging is crossed, ensures higher metallurgy index.7 grades of the grain size requirement of forging is thinner, and forging δ (Ni3Nb) mutually should be rod
Shape or graininess.The forging production cycle is long, it is necessary to send the substantial amounts of frock of system, and forging metallurgical performance index is unstable.Existing forging
Method is made, manufacturing process includes extruding, finish-forging, trimming, heat treatment.Using more molds, including extrusion die, finisher
Tool, shaving die, forging blade manufacturing cost is high, and the number of molds of use is more, causes manufacturing cost higher, is not suitable for small quantities of
Secondary, the short manufacturing cycle, and technical process is complex.
The content of the invention
In order to solve the problems of the prior art, the present invention proposes that one kind simplifies technological process, has saved cost, simultaneously
Ensure the GH4169 stator blade closed die forging methods of part performance.
In order to realize the above object the technical solution adopted in the present invention is：Comprise the following steps：
1) according to stator blade part respectively to the leaf basin type face of forging, blade back type face, forging cross sectional shape and forging
Length is designed；
2) closed molds, including upper die and lower die are designed according to the shape of forging, upper model cavity is according to forging leaf basin type face
Design, drag chamber is according to forging blade back quasi spline, and upper mould height of projection and lower mould are recessed highly identical, upper mould boss with
The side wall fitting of lower mould groove two sides；
3) diameter and length of GH4169 blanks are calculated, prepares blank；
4) heating and thermal insulation is carried out to blank；
5) blank is put into the lower mould modular angle of closed molds, then will pressure along longitudinally collapsing to 0.7~0.8 times of diameter
Flat blank turns 90 ° along axis and is put into drag chamber and continuously hammers, and ensures that upper and lower mould is beaten and leans on, and forging is molded；
6) removing surface is carried out to the forging of shaping；
7) after carrying out solution heat treatment to forging, that is, GH4169 stator blades are obtained.
The design of forging specifically includes in the step 1)：Leaf basin type face and blade back of the forging thickness direction along stator blade
Outside normal direction places 3mm surplus respectively in type face, obtains the leaf basin type face and blade back type face of forging；Forging chord width direction is along stator
Entering while with after the 3mm that stretches out respectively when arranging for blade, tangent line, angle are done on obtained circular arc from blade back direction toward leaf basin direction
Spend for 5 °, and intersect with the extension of leaf basin type face, obtain the cross sectional shape of forging；Forging length direction is along stator blade length both ends
Stretch out 4mm respectively, that is, completes forging design.
Upper model cavity protrusion mould reference plane height 15mm~20mm, the recessed lower mould benchmark of drag chamber in the step 2)
Face 15mm~20mm.
The pattern draft in 5 ° of inclination angles is set in the recessed side wall of the raised and lower mould of upper mould in the step 2).
Upper die and lower die die cavity adds 5mm surpluses in length direction according to forging length dimension in the step 2).
Blank diameter in the step 3)A is the transversal of stator blade forging
Face area；The length L of blank is calculated according to constant-volume principle, L=4V/ (3.14D2), V is the volume of blade forging.
Blank is heated using high-temperature box type electric furnace in the step 4), 1010 ± 10 DEG C of holding temperature, soaking time is pressed
Calculated according to (1.0~1.2) min/mm.
Blank is forged using liquid die hammer in the step 5), and the die cavity of closed molds is uniformly smeared before forging
There is colloidal graphite mixed with water.
Shot Blasting is used to shaping forging in the step 6), clears up forging surface scale.
Solution heat treatment, 965 ± 10 DEG C of holding temperature, insulation 60 are carried out to forging using high-temperature electric resistance furnace in the step 7)
Air cooling after minute.
Compared with prior art, the present invention according to stator blade part respectively to the leaf basin type face of forging, blade back type face, forging
The cross sectional shape and forging length of part are designed, and then design closed molds according to the shape of forging, upper model cavity is according to forging
Part leaf basin quasi spline, drag chamber is according to forging blade back quasi spline, and upper mould height of projection and lower mould are recessed highly identical,
Upper mould boss and the fitting of lower mould groove two sides side wall, control forging can either be played and offsetted, and can enough prevents flash from producing；It is logical
The diameter and length for calculating GH4169 blanks are crossed, makes blank specification suitable, and combines design of the closed molds without flash, is avoided
The excessive mold damage of specification, or the problem of the too small forging of specification can not be full of mould, blank was forged after entering heating and thermal insulation
Make to obtain forging, forging obtains GH4169 stator blades after removing surface and heat treatment, and the present invention is only with a set of forging
Modeling tool can just complete to forge, cost is relatively low, simplifies technological process, and ensure that part performance, particularly suitable for small batch,
The working scene of short manufacturing cycle.The GH4169 stator blades deformation that the present invention obtains is consistent, and blade forging tenon and blade are brilliant
Granularity can uniformly reach 10 grades, and δ (Ni3Nb) mutually should be graininess, and the forging production cycle shortens 3 times, it is only necessary to a set of forging die, greatly
Manufacturing cost is saved greatly.
Further, 5 ° of pattern draft is set in the recessed side wall of the raised and lower mould of upper mould, is easy to depanning, upper mould boss and
The side wall fitting of lower mould groove two sides, it can both play control forging and offset, can prevent flash from producing to form closed molds again,
Upper and lower model cavity places 5mm in length direction again according to forging length dimension, make die cavity length direction leave it is certain between
Gap, ensure that mold cavity is not cracked during forging.
Further, because the inventive method uses closed die forging, therefore blank specification to strictly be calculated, strictly controls base
The diameter and length of material, it is too big to avoid specification, due to the problem of being easily damaged mould without flash design；Or specification is too small,
The problem of forging can not be full of.
Brief description of the drawings
Fig. 1 is that part drawing places the forging drawing obtained after surplus, and double dot dash line is blade part schematic diagram in figure, solid line table
Show forging schematic diagram, do tangent line from blade back direction toward leaf basin direction, angle, θ is 5 °；
Fig. 2 is the structural representation of closed molds, mould, 3- die cavities under the upper moulds of 1-, 2-.
Embodiment
The present invention is further explained with reference to specific embodiment and Figure of description.
The inventive method mainly includes forging design, closed molds design and the formulation of process route, dominating process route
For：Blank calculation, heating, closed die forging, cleaning and heat treatment.It is specific as follows：
1st, forging designs：Referring to Fig. 1, vane thickness direction：According to stator blade part leaf basin, each outside method in blade back type face
To the surplus for placing 3mm, leaf basin, the leaf back of forging are obtained；Chord of blade cross direction：According to the entering of stator blade part, arrange side
Respectively stretching out after 3mm, tangent line is done from blade back direction toward leaf basin direction on obtained circular arc, angle is 5 °, and in forging leaf
The extension of basin type face is intersecting, obtains stator blade forging cross sectional shape；Length of blade direction：According to stator blade part length both ends
The 4mm that respectively stretches out obtains blade forging；Fig. 1 is the forging drawing obtained after part drawing places surplus；
2nd, closed molds design：Referring to Fig. 2, including upper mould 1 and lower mould 2, the part of enclosed die cavity 3：Upper model cavity is according to forging
Part leaf pelvic surface of sacrum designs, and protrudes mould reference plane height 15mm~20mm；Drag chamber is and recessed according to forging blade back quasi spline
Enter lower mould reference plane 15mm~20mm, upper mould height of projection should be consistent with the lower recessed height of mould；In the raised and lower mould of upper mould
For recessed side wall according to 5 ° of designs, this angle is pattern draft；Upper mould boss and the fitting of lower mould groove two sides side wall, both can be with
Play control forging to offset, can prevent flash from producing to form closed molds again；Upper and lower model cavity is in length direction, according to forging
Part length dimension places 5mm again, die cavity is left certain gap in length direction, it is ensured that mold cavity is not cracked.
3rd, Blank calculation：Due to strictly to be calculated using closed die forging, therefore to blank specification, specification is too big, due to nothing
Flash designs, and is easily damaged mould；Specification is too small, and forging can not be full of, and the diameter of blank presses the forging cross section of original blade
Product calculates：
Blank diameterA is the cross-sectional area of blade forging；The length of blank
L is calculated according to constancy of volume, L=4V/ (3.14D2), V is the volume of blade forging
4th, blank heating：Blank specification is less than φ 40mm, without preheating, is heated from high-temperature box type electric furnace, holding temperature
1010 ± 10 DEG C, soaking time is calculated according to (1.0~1.2) min/mm and performed；
5th, closed die forging：Forged from electro-hydraulic die hammer, uniformly smeared with colloidal graphite mixed with water before forging production
Mold cavity, places the blanks on lower mould modular angle, along longitudinally collapsing to 0.7~0.8 times of diameter, then by the blank of flattening along axle
Line turns 90 ° and is put into drag chamber, and continuous hammering three times, ensures that upper/lower die is beaten and leaned on, forging shaping；
6th, clear up：Impeller blasting is carried out to forging, removes forging surface small amounts skin；
7th, it is heat-treated：Solution heat treatment is carried out from high-temperature electric resistance furnace, 965 ± 10 DEG C of holding temperature is empty after being incubated 60 minutes
It is cold, that is, obtain GH4169 stator blades.
Present invention deformation is consistent, and blade forging tenon and blade grain size can uniformly reach 10 grades, and δ (Ni3Nb) mutually should be
Graininess, forging production cycle shorten 3 times, it is only necessary to a set of forging die, greatly save manufacturing cost.
Embodiment one：
1st, forging designs：According to Fig. 1, vane thickness direction：According to stator blade part leaf basin, each outside method in blade back type face
To the surplus for placing 3mm, leaf basin, the leaf back of forging are obtained；Chord of blade cross direction：According to the entering of stator blade part, arrange side
Respectively stretching out after 3mm, tangent line is done from blade back direction toward leaf basin direction on obtained circular arc, angle is 5 °, and in forging leaf
The extension of basin type face is intersecting, obtains stator blade forging cross sectional shape；Length of blade direction：According to stator blade part length both ends
The 4mm. that respectively stretches out obtains blade forging；
2nd, closed molds design：Including upper die and lower die, enclosed cavity section：Upper model cavity is set according to forging leaf pelvic surface of sacrum
Meter, and protrude mould reference plane height 15mm；Drag chamber is according to forging blade back quasi spline, and recessed lower mould reference plane
15mm, upper mould height of projection should be consistent with the lower recessed height of mould, be set in the recessed side wall of the raised and lower mould of upper mould according to 5 °
Meter, this angle is pattern draft；Upper mould boss and the fitting of lower mould groove two sides side wall, it can both play control forging and offset,
It can prevent flash from producing to form closed molds again；Upper and lower model cavity places in length direction again according to forging length dimension
5mm, die cavity is set to leave certain gap in length direction, it is ensured that mold cavity is not cracked；
3rd, Blank calculation：Because the method uses closed die forging, therefore blank specification to being calculated strictly, specification is too big,
Due to being designed without flash, mould is easily damaged；Specification is too small, and forging can not be full of, and the diameter of blank presses the forging of original blade
Cross-sectional area calculates：Blank diameterA is 906.4mm2, obtaining blank diameter D is
35mm, coefficient take 1.03；The length L of blank is calculated according to constancy of volume, L=4V/ (3.14D2), V 65262.5mm3,
It is 72mm to obtain charge length L；
4th, blank heating：Blank specification is less than φ 40mm, without preheating, is heated from high-temperature box type electric furnace, holding temperature
1010 ± 10 DEG C, soaking time performs according to (1.0~1.2) min/mm, is incubated 35min；
5th, closed die forging：Forged from electro-hydraulic die hammer, uniformly applied with colloidal graphite mixed with water before production per forging
Mold cavity is smeared, places the blanks on lower mould modular angle, edge is longitudinally collapsed to 0.7~0.8 times of diameter, then by the blank edge of flattening
Axis turns 90 ° and is put into drag chamber, and continuous hammering three times, ensures that upper/lower die is beaten and leaned on, forging shaping；
6th, clear up：Impeller blasting is carried out to forging, removes forging surface small amounts skin；
7th, it is heat-treated：Solution heat treatment is carried out from high-temperature electric resistance furnace, 965 ± 10 DEG C of holding temperature, is incubated 60 minutes, it is empty
It is cold.
Embodiment two：
1st, forging design is same as above；
2nd, closed molds design：Including upper die and lower die, enclosed cavity section：Upper model cavity is set according to forging leaf pelvic surface of sacrum
Meter, and protrude mould reference plane height 20mm；Drag chamber is according to forging blade back quasi spline, and recessed lower mould reference plane
20mm, upper mould height of projection should be consistent with the lower recessed height of mould；Set in the recessed side wall of the raised and lower mould of upper mould according to 5 °
Meter, this angle is pattern draft；Upper mould boss and the fitting of lower mould groove two sides side wall, it can both play control forging and offset,
It can prevent flash from producing to form closed molds again；Upper and lower model cavity places in length direction again according to forging length dimension
5mm, die cavity is set to leave certain gap in length direction, it is ensured that mold cavity is not cracked；
3rd, Blank calculation：Because the method uses closed die forging, therefore blank specification to being calculated strictly, specification is too big,
Due to being designed without flash, mould is easily damaged；Specification is too small, and forging can not be full of, and the diameter of blank presses the forging of original blade
Cross-sectional area calculates：
Blank diameterA is 1028.2mm2, it is 38mm to obtain blank diameter D,
Coefficient takes 1.05；
The length L of blank is calculated according to constancy of volume, L=4V/ (3.14D2), V 77111.6mm3, obtain blank
Length L is 75mm；
4th, blank heating：Blank specification is less than φ 40mm, without preheating, is heated from high-temperature box type electric furnace, holding temperature
1010 ± 10 DEG C, soaking time performs according to (1.0~1.2) min/mm, is incubated 46min；
5th, closed die forging：Forged from electro-hydraulic die hammer.Uniformly applied with colloidal graphite mixed with water before production per forging
Mold cavity is smeared, places the blanks on lower mould modular angle, edge is longitudinally collapsed to 0.7~0.8 times of diameter, then by the blank edge of flattening
Axis turns 90 ° and is put into drag chamber, and continuous hammering three times, ensures that upper/lower die is beaten and leaned on, forging shaping；
6th, clear up：Impeller blasting is carried out to forging, removes forging surface small amounts skin；
7th, it is heat-treated：Solution heat treatment is carried out from high-temperature electric resistance furnace, 965 ± 10 DEG C of holding temperature, is incubated 60 minutes, it is empty
It is cold.
The present invention can just complete to forge only with a set of forging mold, and cost is relatively low, simplify technological process, and protect
Part performance is demonstrate,proved, particularly suitable for small batch, the working scene of short manufacturing cycle.The GH4169 stator blades that the present invention obtains become
Shape is consistent, and blade forging tenon and blade grain size can uniformly reach 10 grades, and δ (Ni3Nb) mutually should be graininess, forging production week
Phase shortens 3 times, it is only necessary to a set of forging die, greatlys save manufacturing cost.
Claims (8)
- A kind of 1. GH4169 stator blades closed die forging method, it is characterised in that comprise the following steps：1) according to stator blade part respectively to leaf basin type face, blade back type face, the cross sectional shape of forging and the forging length of forging It is designed；2) closed molds are designed according to the shape of forging, including upper die and lower die, upper model cavity according to forging leaf basin quasi spline, Drag chamber is according to forging blade back quasi spline, and upper mould height of projection and lower mould are recessed highly identical, upper mould boss and lower mould The side wall fitting of groove two sides；Upper model cavity protrudes mould reference plane height 15mm~20mm, the recessed lower mould reference plane 15mm~20mm of drag chamber；3) diameter and length of GH4169 blanks are calculated, prepares blank；Blank diameterA is the cross-sectional area of stator blade forging；The length of blank L is calculated according to constant-volume principle, L=4V/ (3.14D2), V is the volume of blade forging；4) heating and thermal insulation is carried out to blank；5) blank is put into the lower mould modular angle of closed molds, edge is longitudinally collapsed to 0.7~0.8 times of diameter, then by flattening Blank turns 90 ° along axis and is put into drag chamber and continuously hammers, and ensures that upper and lower mould is beaten and leans on, and forging is molded；6) removing surface is carried out to the forging of shaping；7) after carrying out solution heat treatment to forging, that is, GH4169 stator blades are obtained.
- A kind of 2. GH4169 stator blades closed die forging method according to claim 1, it is characterised in that the step 1) The design of middle forging specifically includes：Distinguish outside normal direction and add in leaf basin type face and blade back type face of the forging thickness direction along stator blade 3mm surplus is put, obtains the leaf basin type face and blade back type face of forging；Forging chord width direction is divided along entering for stator blade while with row Do not stretch out after 3mm, tangent line done from blade back direction toward leaf basin direction on obtained circular arc, angle is 5 °, and with leaf basin type Face extension is intersecting, obtains the cross sectional shape of forging；Forging length direction stretches out 4mm respectively along stator blade length both ends, Complete forging design.
- A kind of 3. GH4169 stator blades closed die forging method according to claim 1, it is characterised in that the step 2) In in the recessed side wall of the raised and lower mould of upper mould, the pattern draft in 5 ° of inclination angles is set.
- A kind of 4. GH4169 stator blades closed die forging method according to claim 3, it is characterised in that the step 2) Middle upper die and lower die die cavity adds 5mm surpluses in length direction according to forging length dimension.
- A kind of 5. GH4169 stator blades closed die forging method according to claim 1, it is characterised in that the step 4) In to blank using high-temperature box type electric furnace heat, 1010 ± 10 DEG C of holding temperature, soaking time is according to (1.0~1.2) min/mm Calculate.
- A kind of 6. GH4169 stator blades closed die forging method according to claim 1, it is characterised in that the step 5) It is middle that blank is forged using liquid die hammer, and the die cavity of closed molds is uniformly coated with colloidal graphite mixed with water before forging.
- A kind of 7. GH4169 stator blades closed die forging method according to claim 1, it is characterised in that the step 6) In Shot Blasting use to shaping forging, cleaning forging surface scale.
- A kind of 8. GH4169 stator blades closed die forging method according to claim 1, it is characterised in that the step 7) It is middle that solution heat treatment, 965 ± 10 DEG C of holding temperature, air cooling after being incubated 60 minutes are carried out to forging using high-temperature electric resistance furnace.
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| CN112605325B (en) * | 2020-11-30 | 2023-02-28 | 贵州航天新力科技有限公司 | Eccentric forging forming process |
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| CN106180506A (en) | 2016-12-07 |
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Address after: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee after: AECC AVIATION POWER CO., LTD. Address before: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee before: AVIC AVIATION ENGINE CORPORATION PLC |
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