CN104404230B - Composite manufacturing method for prevention of deformation of aeroengine annular intake cover - Google Patents
Composite manufacturing method for prevention of deformation of aeroengine annular intake cover Download PDFInfo
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- CN104404230B CN104404230B CN201410642138.1A CN201410642138A CN104404230B CN 104404230 B CN104404230 B CN 104404230B CN 201410642138 A CN201410642138 A CN 201410642138A CN 104404230 B CN104404230 B CN 104404230B
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Abstract
The invention relates to a composite manufacturing method for prevention of deformation of an aeroengine annular intake cover, and collapse or buckling deformation of the annular intake cover can be controlled by the composite manufacturing method comprising first, preset of a process hole, high temperature pre-heat treatment for removal of stress, power spinning, and high temperature final heat treatment for removal of stress. Through the preset of the process hole, heat cycle is smoother, and the weight of a part itself is reduced; through in-advance high temperature vacuum for removal of stress, then power spinning when the annular intake cover is at the lowest stress state, and final heat treatment of the annular intake cover, the stress can be eliminated in high temperature and vacuum conditions, mechanical stress produced after the power spinning can be eliminated or reduced, and the success rate of the power spinning in stress-free or low-stress conditions can be ensured, so that the rate of finished products is improved, and the work efficiency is improved.
Description
Technical field
The present invention relates to the combination manufacturing method of a kind of airscoop shroud deformation, be specifically related to one and prevent aeroplane engine
The combination manufacturing method of machine annular airscoop shroud deformation.
Background technology
Aero-engine airscoop shroud material is refractory metal material, and outside dimension and height ratio are relatively big, by force
Need after power rotary press modelling airscoop shroud is carried out vacuum heat.Before vacuum heat, carry due to shear spinning
The material internal stress come is relatively big, adds the high-temperature hot stress that vacuum heat treatment process produces, easily causes
There is serious buckling deformation in airscoop shroud external arc surface, even scraps.Airscoop shroud after deformation needs through returning
Repair or do over again process, both added manufacturing cost, and extended again the manufacturing cycle.
Annular airscoop shroud belongs to structure complexity, size entity structure bigger, void-free, in order to prevent annular
Subsiding or buckling deformation in airscoop shroud manufacture process, traditional solution has two kinds, and one is to increase very
Empty heat treatment tooling, and design the vacuum heat treatment process with Slow cooling that slowly heats up, make material internal
Stress and mechanical stress obtain slow, discharge uniformly；Another kind is by design shear spinning and Vacuum Heat
Process in the equipment of one, it is ensured that the stress after annular airscoop shroud shear spinning obtains release during pole.
Although above-mentioned measure can effectively prevent the buckling deformation of annular airscoop shroud, but technique and the design of equipment
With manufacture process complexity, cost is high, production efficiency is low.
Summary of the invention
It is an object of the invention to overcome shortcoming present in above-mentioned prior art, it is provided that one prevents aviation from sending out
The combination manufacturing method of motivation annular airscoop shroud deformation, has the advantage that yield rate is high.
For achieving the above object, the present invention is by the following technical solutions: comprise the following steps:
1) take annular airscoop shroud, several are pre-machined at annular airscoop shroud small end outer surface, it can be ensured that zero
The fabrication hole that part inner chamber is unobstructed with gas stream in the stove；
2) by through step 1) obtain the annular airscoop shroud offering fabrication hole carry out in vacuum environment in advance heat
Processing, heat treatment in advance temperature is 1050-1060 DEG C, temperature retention time 20～30min；
3) by through step 2) after annular airscoop shroud after heat treatment in advance is cooled to 80 DEG C, to annular airscoop shroud
Spinning curved surface and spinning limit carry out shear spinning process；
4) by through step 3) annular airscoop shroud after shear spinning processes is placed in vacuum environment, carries out final
Heat treatment；Finished heat treatment temperature is 860-880 DEG C, temperature retention time 20～30min, drops after eliminating stress
Temperature cooling, has finally given the aero-engine annular airscoop shroud being prevented from deformation.
Described step 1) in being uniformly distributed of fabrication hole offered, number is 5～8, specification be φ 8mm～
φ15mm。
Described step 2) in carry out the annular airscoop shroud of heat treatment in advance, for cleaning annular airscoop shroud, and clearly
The method washed is: cleaned up by annular airscoop shroud with gasoline or acetone, after dry.
Described step 2) in, the annular airscoop shroud that one-time heating processes is ten, and during heating: by the
One big end of annular airscoop shroud is placed on downwards on bracket, by second annular airscoop shroud small end downwards with first
The laminating of part annular airscoop shroud small end is placed, by downward for the 3rd the big end of annular airscoop shroud and second annular air inlet
Cover big end laminating is placed, and by that analogy, loads ten annular airscoop shrouds altogether.
Described step 2) in, pressure during vacuum is 6.65 × 10-2Pa。
Described step 2) in, by the process that annular airscoop shroud is heated to 1050-1060 DEG C it is: at room temperature bar
With 10 DEG C/minute by annular airscoop shroud temperature rise to 800 DEG C under part, and in 800 DEG C of dividing potential drops to 6.65～10.64Pa,
Afterwards with 6 DEG C/minute by annular airscoop shroud temperature rise to 1050-1060 DEG C.
Described step 3) in, spinning curved surface and spinning limit to annular airscoop shroud carry out shear spinning process
Mode is:
(1) clamping workpiece: annular airscoop shroud is fixed on main shaft floral disc with hold down gag；
(2) roller is installed: be fixed on spinning roller frame by spinning roller with bolt；
(3) rotary press modelling: start spinning roller, the spinning to the annular airscoop shroud being fixed on main shaft floral disc
Curved surface 4 and spinning limit carry out shear spinning forming processes.
Described step 4) in, to before the finished heat treatment of annular airscoop shroud through gasoline or acetone by annular air inlet
Cover cleans up, and dries.
Described step 4) in finished heat treatment time annular airscoop shroud load mode be: first annular is entered
The big end of gas hood is placed on downwards on bracket, by downward for second annular airscoop shroud small end and first annular air inlet
The laminating of cover small end is placed, and is fitted with second big end of annular airscoop shroud downwards by the 3rd the big end of annular airscoop shroud
Place, by that analogy, load ten annular airscoop shrouds altogether.
Described step 4) in the process of finished heat treatment be: be evacuated to 6.65 × 10-2Pa, then with 10 DEG C/
Point temperature is raised to 790-810 DEG C, and at such a temperature dividing potential drop to 6.65～10.64Pa；Again with 6 DEG C/minute by temperature
Degree is raised to 860-880 DEG C, and insulation 20～30min at such a temperature.
The present invention has following beneficial effect: compare prior art, the present invention by first predetermined process hole,
The combination manufacturing method of high temperature heat treatment in advance de-stress, shear spinning and high temperature finished heat treatment de-stress comes
Control annular airscoop shroud to subside or buckling deformation.By predetermined process hole, make recycle heat more smooth and easy, also subtract
The light weight of part itself；Stress is eliminated, at annular airscoop shroud at minimum stress by high-temperature vacuum in advance
Shear spinning under state；Finally, annular airscoop shroud is carried out finished heat treatment so that it is elevated temperature in vacuo
Lower elimination stress, the mechanical stress produced after eliminating or reducing shear spinning.Ensure that unstressed or low stress
The success rate of shear spinning under state.Thus improve the yield rate of product, improve work efficiency.
Further, owing to original part useful load is increased 10 by 2 by method, both improve
Production efficiency, shortens again the production cycle.
Accompanying drawing explanation
Fig. 1 is annular airscoop shroud structural representation；
Fig. 2 is that annular airscoop shroud vacuum heat loads schematic diagram；
Fig. 3 is annular airscoop shroud shear spinning schematic diagram；
Fig. 4 is annular airscoop shroud shear spinning roller schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the present invention is described in further detail.
Seeing Fig. 1-4, the present invention comprises the following steps:
1) taking annular airscoop shroud 1,5～8 specifications being pre-machined at annular airscoop shroud small end 2 outer surface is
φ 8mm～φ 15mm, it can be ensured that the fabrication hole 5 that inner cavity of component is unobstructed with gas stream in the stove；
2) by through step 1) the annular airscoop shroud 1 that obtains offering fabrication hole 5 cleans, and the method for cleaning is:
With gasoline or acetone, annular airscoop shroud 1 is cleaned up, after dry, carry out in vacuum environment in advance at heat
Reason, at ambient temperature with 10 DEG C/minute by annular airscoop shroud 1 temperature rise to 800 DEG C, and 800 DEG C of dividing potential drops extremely
6.65～10.64Pa, afterwards with 6 DEG C/minute by annular airscoop shroud 1 temperature rise to 1050-1060 DEG C；Temperature retention time 20～
30min, pressure is 6.65 × 10-2Pa, and the annular airscoop shroud 1 that processes of one-time heating to clean number be ten,
During heating: first big end of annular airscoop shroud 3 is placed on downwards on bracket, by second annular airscoop shroud
Small end 2 is placed, by the 3rd the big end of annular airscoop shroud 3 with first annular airscoop shroud small end 2 laminating downwards
Place with second annular airscoop shroud big end 3 laminating downwards, by that analogy, load ten annular airscoop shrouds 1 altogether；
3) by through step 2) after annular airscoop shroud 1 after heat treatment in advance is cooled to 80 DEG C, to annular air inlet
Spinning curved surface 4 and the spinning limit of cover 1 carry out shear spinning process；Spinning curved surface 4 to annular airscoop shroud 1
The mode carrying out shear spinning process with spinning limit is:
(1) clamping workpiece: annular airscoop shroud 1 is fixed on main shaft floral disc with hold down gag；
(2) roller is installed: be fixed on spinning roller frame by spinning roller with bolt；
(3) rotary press modelling: start spinning roller, the rotation to the annular airscoop shroud 1 being fixed on main shaft floral disc
Buckle face 4 and spinning limit carries out shear spinning forming processes；
4) by through step 3) shear spinning process after annular airscoop shroud 1 use gasoline or acetone annular to be entered
Gas hood cleans up, and dries cleaning and be placed in vacuum environment, carries out finished heat treatment；Finished heat treatment
Process be: be evacuated to 6.65 × 10-2Pa, is then raised to 790-810 DEG C with 10 DEG C/minute by temperature, and at this
At a temperature of dividing potential drop to 6.65～10.64Pa；With 6 DEG C/minute, temperature is raised to 860-880 DEG C again, and be incubated 20～
30min, cooling down to elimination stress, finally give the aero-engine annular being prevented from deforming and entered
Gas hood；And the load mode of annular airscoop shroud 1 is during finished heat treatment: by first big end of annular airscoop shroud 3
Be placed on downwards on bracket, by second annular airscoop shroud small end 2 downwards with first annular airscoop shroud small end 2
Laminating is placed, and is put with second annular airscoop shroud big end 3 laminating downwards by the 3rd the big end of annular airscoop shroud 3
Put, by that analogy, load ten annular airscoop shrouds 1 altogether.
Check annular airscoop shroud 1 surface with or without subsiding, buckling deformation phenomenon occurs.
The reason of 1. analysis annular airscoop shroud buckling deformation:
First, annular airscoop shroud 1 is before shear spinning, and the stress of material internal is not eliminated or reduces,
Making annular airscoop shroud 1 after shear spinning, material internal creates bigger residual tension, and should
The irregular distribution of power, and existing methodical deficiency is that supercoated stress elimination is the most thorough.
Secondly, vacuum eliminates the charging mode of stress and uses the method for superposition bottom two annular airscoop shrouds 1, and
Now the cavity between annular airscoop shroud is not smooth with gas stream in the stove circulation, adds vacuum heat cooling stage,
The argon of big flow, is all probably and causes annular airscoop shroud 1 to subside or the factor of buckling deformation.
2. anti-deformation combination manufacturing method is determined:
The main contents of the present invention include: first, the most uniformly process at annular airscoop shroud small end 2 outer surface
The fabrication hole 5 of (5～8) individual (φ 8mm～φ 15mm), it is ensured that inner cavity of component is unobstructed with gas stream in the stove；
Secondly, annular airscoop shroud 1 being heated to 1050-1060 DEG C, the high-temperature vacuum of insulation 20～30min disappears
De-stress, eliminates or reduces the internal stress of material itself；Then, it is ensured that annular airscoop shroud 1 is at minimum stress
Shear spinning under state；Finally, annular airscoop shroud 1 is heated to 880-860 DEG C, is incubated 20～30min
High-temperature vacuum eliminate stress, eliminate or reduce the mechanical stress produced after shear spinning.
3. the checking of anti-deformation combination manufacturing method:
Testing equipment: radial drilling machine Z35, by force rotation lathe D50/60HRH, Ipsen large-size horizontal H54 × 48
Vacuum air-quenching furnace；
Device parameter
Drilling machine: speed of mainshaft 200mm/min, amount of feeding 0.3mm/r, cutting depth 0.1mm；
Revolve by force lathe: speed of mainshaft 600mm/min, amount of feeding 0.3mm/r, cutting depth 0.1mm；
Vacuum drying oven: effective heating area 1200mm (length) × 900mm (wide) × 900mm (high) furnace temperature is equal
Even property (300～750) DEG C/± 5 DEG C, (800～1150) DEG C/± 10 DEG C, Pressure Rise Rate≤1.3Pa/h, argon
Throughput is set to 880mbar；
Proof scheme: be shown in Table 1.
Table 1
4. conclusion is verified
Be combined the checking of manufacture method by the scheme in group A and group B after, when useful load be 8～
When 10, subsiding or buckling deformation does not occurs in annular airscoop shroud 1；When useful load is 11, the ring of bottom
Shape airscoop shroud 1 spinning limit occurs in that buckling deformation, overproof amount 0.05～0.08mm, other annular airscoop shrouds 1
Do not find to subside or buckling deformation, cause the reason of buckling deformation to be probably bottom annular airscoop shroud 1 load-bearing
Greatly, at high temperature there occurs deformation.
The advantage of anti-deformation combination manufacturing method: by predetermined process hole, makes recycle heat more smooth and easy, also subtracts
The light weight of part itself；Stress is eliminated, it is ensured that unstressed or low stress shape by high-temperature vacuum in advance
The success rate of shear spinning under state.Additionally, original part useful load is increased 10 by 2 by the method
Part, had both improve production efficiency, had shortened again the production cycle.
Claims (8)
1. one kind prevents the combination manufacturing method that aero-engine annular airscoop shroud deforms, it is characterised in that: comprise the following steps:
1) take annular airscoop shroud (1), several are pre-machined at annular airscoop shroud small end (2) outer surface, it can be ensured that the fabrication hole (5) that inner cavity of component is unobstructed with gas stream in the stove；
2) by through step 1) the annular airscoop shroud (1) that obtains offering fabrication hole (5) carries out heat treatment in advance in vacuum environment, at ambient temperature with 10 DEG C/minute by annular airscoop shroud (1) temperature rise to 800 DEG C, and in 800 DEG C of dividing potential drops to 6.65～10.64Pa, afterwards with 6 DEG C/minute by annular airscoop shroud 1 temperature rise to 1050-1060 DEG C；Temperature retention time 20～30min, pressure is 6.65 × 10-2Pa；
3) by through step 2) after annular airscoop shroud (1) after heat treatment in advance is cooled to 80 DEG C, spinning curved surface (4) and spinning limit to annular airscoop shroud (1) carry out shear spinning process；
4) by through step 3) shear spinning process after annular airscoop shroud (1) be placed in vacuum environment, carry out finished heat treatment；The process of finished heat treatment is: be evacuated to 6.65 × 10-2Pa, is then raised to 790-810 DEG C with 10 DEG C/minute by temperature, and at such a temperature dividing potential drop to 6.65～10.64Pa；With 6 DEG C/minute, temperature is raised to 860-880 DEG C again, and is incubated 20～30min, cooling down to elimination stress, finally give the aero-engine annular airscoop shroud being prevented from deformation.
A kind of combination manufacturing method preventing aero-engine annular airscoop shroud from deforming the most according to claim 1, it is characterized in that: described step 1) in the fabrication hole (5) offered be uniformly distributed, number is 5～8, and specification is φ 8mm～φ 15mm.
A kind of combination manufacturing method preventing aero-engine annular airscoop shroud from deforming the most according to claim 1, it is characterized in that: described step 2) in carry out the annular airscoop shroud (1) of heat treatment in advance, for cleaning annular airscoop shroud, and clean method be: with gasoline or acetone, annular airscoop shroud is cleaned up, after dry.
A kind of combination manufacturing method preventing aero-engine annular airscoop shroud from deforming the most according to claim 1, it is characterized in that: described step 2) in, the annular airscoop shroud (1) that one-time heating processes is ten, and during heating: first the big end of annular airscoop shroud (3) is placed on downwards on bracket, second annular airscoop shroud small end (2) is placed with first annular airscoop shroud small end (2) laminating downwards, 3rd the big end of annular airscoop shroud (3) is placed with second the big end of annular airscoop shroud (3) laminating downwards, by that analogy, load ten annular airscoop shrouds (1) altogether.
A kind of combination manufacturing method preventing aero-engine annular airscoop shroud from deforming the most according to claim 1, it is characterised in that: described step 2) in, pressure during vacuum is 6.65 × 10-2Pa。
A kind of combination manufacturing method preventing aero-engine annular airscoop shroud from deforming the most according to claim 1, it is characterized in that: described step 3) in, the spinning curved surface (4) of annular airscoop shroud (1) and spinning limit are carried out the mode of shear spinning process is:
(1) clamping workpiece: annular airscoop shroud (1) is fixed on main shaft floral disc with hold down gag；
(2) roller is installed: be fixed on spinning roller frame by spinning roller with bolt；
(3) rotary press modelling: starting spinning roller, spinning curved surface (4) and spinning limit to the annular airscoop shroud (1) being fixed on main shaft floral disc carry out shear spinning forming processes.
A kind of combination manufacturing method preventing aero-engine annular airscoop shroud from deforming the most according to claim 1, it is characterized in that: described step 4) in, through gasoline or acetone, annular airscoop shroud (1) is cleaned up before finished heat treatment to annular airscoop shroud (1), and dry.
A kind of combination manufacturing method preventing aero-engine annular airscoop shroud from deforming the most according to claim 1, it is characterized in that: described step 4) in finished heat treatment time annular airscoop shroud (1) load mode be: first the big end of annular airscoop shroud (3) is placed on downwards on bracket, second annular airscoop shroud small end (2) is placed with first annular airscoop shroud small end (2) laminating downwards, 3rd the big end of annular airscoop shroud (3) is placed with second the big end of annular airscoop shroud (3) laminating downwards, by that analogy, load ten annular airscoop shrouds (1) altogether.
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| CN201410642138.1A CN104404230B (en) | 2014-11-13 | 2014-11-13 | Composite manufacturing method for prevention of deformation of aeroengine annular intake cover |
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| CN201410642138.1A CN104404230B (en) | 2014-11-13 | 2014-11-13 | Composite manufacturing method for prevention of deformation of aeroengine annular intake cover |
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| CN106623611B (en) * | 2016-12-08 | 2018-11-06 | 重庆理工大学 | A kind of combined shaping method of the depth bipyramid with top dome shape thin-wall part |
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| DE4425033C2 (en) * | 1994-07-15 | 1999-07-29 | Fraunhofer Ges Forschung | Method and device for press forming workpieces |
| CN101579804B (en) * | 2009-06-04 | 2010-08-11 | 航天材料及工艺研究所 | Integral forming method of large size thin-walled titanium alloy cylindrical part without welding line |
| CN102310133A (en) * | 2010-06-30 | 2012-01-11 | 哈尔滨建成集团有限公司 | Heat spinning thinning forming method for 5A06 aluminum alloy thick wall cylindrical part |
| CN102392116B (en) * | 2011-11-24 | 2013-02-20 | 西安航空动力股份有限公司 | Loading method of thin-wall annular part |
| CN102747196B (en) * | 2012-07-18 | 2013-09-04 | 西安航空动力股份有限公司 | Supporting device preventing deformation of circular workpieces |
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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 Corp.,PLC |
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Address after: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee after: AVIC AVIATION ENGINE Corp.,PLC Address before: Fengcheng Weiyang District ten road 710021 Shaanxi city of Xi'an Province Patentee before: XI'AN AVIATION POWER Co.,Ltd. |
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