CN103551472B - A kind of hollow blade pushes away o ing technique - Google Patents
A kind of hollow blade pushes away o ing technique Download PDFInfo
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- CN103551472B CN103551472B CN201310508213.0A CN201310508213A CN103551472B CN 103551472 B CN103551472 B CN 103551472B CN 201310508213 A CN201310508213 A CN 201310508213A CN 103551472 B CN103551472 B CN 103551472B
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000000314 lubricant Substances 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 5
- 229910052582 BN Inorganic materials 0.000 claims description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical group N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005452 bending Methods 0.000 description 15
- 238000007493 shaping process Methods 0.000 description 8
- 239000007787 solid Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000035772 mutation Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
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Abstract
The invention discloses a kind of hollow blade and push away o ing technique, first generate mould cavity curved surface according to finished product hollow blade appearance curved surface; According to mould cavity curved surface processing mold, mould is formed the die cavity passage of a both sides opening; According to blade tenon profile design chuck; Chuck and mould are fixed on hot press; At mold cavity inner surface and blade blank surface coated with high temperature lubricant; Blade blank is arranged on chuck; Hot press action, mould is closed, and blade, towards mold movement, pushes mold cavity from die cavity passage end by colleting moving vane, and blade is forced to bend under the effect of mold cavity inner surface, and twist distortion; After keeping certain hour, mould is opened, and pulls down the blade be shaped.Dull and stereotyped hollow blade blank can be shaped complicated twisting contour by the present invention, and make it possess required torsion angle, forming process is steadily convenient, and speed is controlled, and each several part distortion is evenly distributed, and production efficiency is high.
Description
Technical field
The present invention relates to a kind of hollow blade and push away o ing technique, it is for being shaped with the blade of complicated torsion angle, particularly hollow blade.
Background technology
The compressor blade that all kinds of aero-engine uses is in order to meet the requirement of its aerodynamic configuration, and blade profile is usually with the torsion angle of complexity.The curved profile of this distortion brings huge difficulty to the processing and manufacturing of blade.Particularly for the blade with hollow Lightened structure, its loss of weight part interior hollow, exterior panel is little thickness thin plate.Panel only has the support of reinforcement at regional area, major part is in vacant state.This kind of blade is due to its design feature in bending forming process, and torsional rigidity is undergone mutation at solid hollow intersection on the one hand, and the reinforcement of its inside hinders the flowing of panel material in torsional deflection on the other hand.Hollow blade is very easy to produce forming defects in torsion.
In order to the complicated torsional angle being shaped on blade, the most widely used technique uses twisting fixture to carry out bending shaping at present.Wherein single chuck bending shaping use a pair chuck, clamps tenon and the blade tip position of blade respectively, relatively rotating angle, blade twist being shaped by giving two chucks.This method for equal thickness solid vane effect still can, for Varying-thickness hollow blade, at hollow and solid intersectional region, the torsional rigidity of blade is undergone mutation, solid area torsional rigidity near blade root position is large, and thickness is thick, and the windup-degree produced by torsional moment is very little; The hollow area of closing on solid area in the middle part of blade, because torsional rigidity is undergone mutation, and compared to blade root position thinner thickness, torsional rigidity is low, opposing torque capability is poor, and most of torsional deflection concentrates on this in formation, causes blade panel herein to be turned round unstability serious.Therefore when formed hollow blade, single chuck reverses the workpiece obtained, and windup-degree distribution is very uneven, and forming defects is many, and quality is unstable.Many chucks bending technique, on the basis of single chuck bending technique, adds the clamping head of some auxiliary torsions in the middle part of blade, by giving the different reverse speed of each chuck and angle carrys out twist blade to required angle.But many chucks torsion equipment is owing to adding inner auxiliary chuck, complex structure, and make to reverse shaping equipment volume and increase, cost improves.As a rule, the shaping of blade generally need be carried out in a heated state, to improve the machinability of material.Many chucks bending device structure is complicated, and very inconvenient in the mounting or dismounting of hot lower workpiece, and therefore production efficiency is low, needs improvement.
Summary of the invention
The invention provides a kind of new hollow blade and push away o ing technique, which overcome existing hollow blade and reverse the problem that shaping technological effect is unstable, equipment is complicated, the rear defect that is shaped is many, substantially improve product quality, improve production efficiency; Simultaneously hollow blade of the present invention pushes away o ing technique and dull and stereotyped hollow blade blank can be shaped complicated twisting contour, and make it possess required torsion angle, forming process is steadily convenient, and speed is controlled, and each several part distortion is evenly distributed, and production efficiency is high.The bending that this method can be applied to all kinds of hollow blade or solid vane is shaped.
The present invention adopts following technical scheme: a kind of hollow blade pushes away o ing technique, and it comprises the steps:
Step one: generate mould cavity curved surface according to finished product hollow blade appearance curved surface;
Step 2: according to the mould cavity curved surface processing mold obtained, described mould is formed the die cavity passage of a both sides opening, and one of them opening is used for blade to push;
Step 3: according to blade tenon profile design for clamping the chuck of blade;
Step 4: chuck and mould are fixed on hot press;
Step 5: at mold cavity inner surface coated with high temperature lubricant, at hollow blade blank surface coated with high temperature lubricant;
Step 6: hollow blade blank is arranged on chuck;
Step 7: hot press action, mould is closed, and blade, towards mold movement, pushes mold cavity from die cavity passage end by colleting moving vane, and blade is in the process going deep into die cavity, and be forced to bend under the effect of mold cavity inner surface, twist distortion;
Step 8: after keeping certain hour, mould is opened, the backhaul of blade chuck, shifting out mould, pulling down the blade be shaped, completing a working cycles by completing the blade pushing away o ing.
Two half modules that described mould designs for folding.
In described step 4, the first half module level is arranged on hot press pressure head, and the second half module level is arranged on hot press work top.
In described step 4, the first half module is uprightly arranged on hot press work top also fixing, and the second half module is uprightly arranged on the removable slide block of hot press workbench, and chuck is arranged on hot press pressure head also fixing.
Described first half module is identical with the material of the second half module, with location guide device on described mould structure.
Described high-temperature lubricant is boron nitride high-temperature lubricant or graphite.
The present invention has following beneficial effect:
(1) hollow blade of the present invention pushes away o ing technique and uses and push away curved mould and coordinate hot press to go out torsion angle needed for hollow blade to push away o ing, instead of original use torsion equipment to reverse the technique of shaping hollow blade, compared to technique before, push-bending process overcomes the distortion caused because hollow blade torsional rigidity each several part differs greatly and concentrates, and its torsion rear blade panel depression problem such as excessive caused, forming effect obviously improves;
(2) push away curved process Leaf and mould Contact area large, contact area constantly shifts, and not easily the defects such as panel indentation occurs, in the normal situation of lubrication, forming process is steady, and each position distortions amount of blade is evenly distributed, forming defects is little, constant product quality;
(3) adopt and push away curved mould and carry out pushing away curved, technological parameter is easy to control, and by adjusting the gap between two die faces, can control easily to push away curved effect, pushes away o ing speed and regulates by controlling hot press operational factor;
(4) what push-bending process adopted pushes away bending mould structure simply, is convenient to design, changes easily in hot lower work-handling;
(5) push-bending process is easy to realize automation aborning, greatly can improve the production efficiency of the hollow blade with complicated torsion angle.
Accompanying drawing explanation
Fig. 1 is finished product hollow blade appearance schematic diagram.
Fig. 2 is hollow blade blank shape schematic diagram to be formed.
Fig. 3 is for pushing away bending mould schematic cross-section.
Fig. 4 is for pushing away bending mould schematic diagram.
Wherein, 1-first half module, 2-second half module, 3-chuck, 4-blade; 5-mold cavity passage.
Detailed description of the invention
Please refer to shown in Fig. 1 to Fig. 4, hollow blade of the present invention pushes away o ing technique and comprises the steps:
Step one: generate mould cavity curved surface according to finished product hollow blade appearance curved surface;
Step 2: according to the mould cavity curved surface processing mold obtained, described mould is formed the die cavity passage of a both sides opening, and one of them opening is used for blade to push;
Step 3: according to blade tenon profile design for clamping the chuck of blade;
Step 4: chuck and mould are fixed on hot press;
Step 5: at mold cavity inner surface coated with high temperature lubricant, at hollow blade blank surface coated with high temperature lubricant;
Step 6: hollow blade blank is arranged on chuck;
Step 7: hot press action, mould is closed, and blade, towards mold movement, pushes mold cavity from die cavity passage end by colleting moving vane, and blade is in the process going deep into die cavity, and be forced to bend under the effect of mold cavity inner surface, twist distortion;
Step 8: after keeping certain hour, mould is opened, the backhaul of blade chuck, shifting out mould, pulling down the blade be shaped, completing a working cycles by completing the blade pushing away o ing.
Enumerate the next concrete elaboration hollow blade of the present invention of two kinds of embodiments below and push away o ing technique.
First embodiment:
1. generate mould cavity curved surface according to finished product hollow blade appearance curved surface.
2. according to the mould cavity curved surface processing mold obtained.
3. the first half module 1 level is arranged on hot press pressure head, and the second half module 2 level is arranged on hot press work top, and blade 4 is arranged on horizontally disposed chuck 3.
4. push away o ing process as follows:
(1) formed hollow blade blank is arranged on chuck 3, sends into heating in stove;
(2) hot press pressure head is descending, the first half module 1 and the second half module 2-in-1 on;
(3) chuck 3 is to mold movement, and blade 4 is pushed mould from mold cavity passage 5 one end, and blade torsional bending under mould action is shaped;
(4) hot press pressure head backhaul, mould is opened;
(5) chuck backhaul, will push away the blade pull-out mould that o ing terminates, complete a working cycles.
Second embodiment:
1. generate mould cavity curved surface according to finished product hollow blade appearance curved surface.
2. according to the mould cavity curved surface processing mold obtained.
3. be uprightly arranged on by the first half module 1 on hot press work top also fixing, the second half module 2 is uprightly arranged on the removable slide block of hot press workbench, and chuck 3 is arranged on hot press pressure head also fixing, and blade 4 is uprightly arranged on blade chuck 3.
4. push away o ing process as follows:
(1) hollow blade blank to be formed is arranged on chuck 3, sends into heating in stove;
(2) hot press workbench slide block moves, the first half module 1 and the second half module 2-in-1 on;
(3) hot press pressure head is descending, and blade, towards mold movement, is pushed mould from mold cavity passage end by band moving vane, and blade torsional bending under mould action is shaped;
(4) workbench slide block moves, and mould is opened;
(5) hot press pressure head backhaul, will push away the blade pull-out mould that o ing terminates, complete a working cycles.
Pushing away curved deformation temperature in above-mentioned first embodiment and the second embodiment Leaf is 700 DEG C-800 DEG C.
At mold cavity surface coated with high temperature lubricant in above-mentioned first embodiment and the second embodiment, at blade surface coated with high temperature lubricant, mould and blade are heated to 750 DEG C, insulation a period of time reaches samming.
The high-temperature lubricant adopted in above-mentioned first embodiment and the second embodiment is boron nitride high-temperature lubricant or graphite.
Because blade twist angle is large, push away after o ing puts in place, blade is provided with the complicated torsion angle of approximate mold cavity shapes, can interfere, directly cannot extract the blade after shaping out in the process of returning with mould.Therefore the Design of Dies used in above-mentioned first embodiment and the second embodiment is can two half modules of folding, can blade push away be bent to position after open, to take out the blade pushing away o ing and complete.
In first embodiment of the invention and the second embodiment, two half module materials are identical, separately manufacture.With location guide device on mould structure.
In above-mentioned first embodiment and the second embodiment, for the acquisition of mould cavity curved surface, there are following two kinds of methods:
1. extract finished product blade exterior blade profile curved surface, the certain distance that stretched out by surface boundary obtains the blade profile curved surface after extending.Fix one and extend rear curved surface invariant position, another is extended curved surface and outwards offsets certain distance as die clearance.In the present invention's two embodiments, fixing blade back N-Side surf invariant position, by leaf pelvic curvature towards outer skew 10mm, obtains two mould cavity curved surfaces;
2., according to shaping blade profile, the rule drawing out approximate finished product profile reverses curved surface as mold cavity inner surface.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, can also make some improvement under the premise without departing from the principles of the invention, and these improvement also should be considered as protection scope of the present invention.
Claims (6)
1. hollow blade pushes away an o ing technique, and its feature comprises the steps:
Step one: generate mould cavity curved surface according to finished product hollow blade appearance curved surface;
Step 2: according to the mould cavity curved surface processing mold obtained, described mould is formed the mold cavity passage of a both sides opening, and one of them opening is used for blade to push;
Step 3: according to blade tenon profile design for clamping the chuck of blade;
Step 4: chuck and mould are fixed on hot press;
Step 5: at mold cavity inner surface coated with high temperature lubricant, at hollow blade blank surface coated with high temperature lubricant;
Step 6: hollow blade blank is arranged on chuck;
Step 7: hot press action, mould is closed, and colleting moving vane blank is towards mold movement, through opening, blade is pushed mold cavity from die cavity passage end, blade is in the process going deep into die cavity, and be forced to bend under the effect of mold cavity inner surface, twist distortion;
Step 8: after keeping certain hour, mould is opened, the backhaul of blade chuck, shifting out mould, pulling down the blade be shaped, completing a working cycles by completing the blade pushing away o ing.
2. hollow blade according to claim 1 pushes away o ing technique, it is characterized in that: two half modules that described mould designs for folding.
3. hollow blade according to claim 2 pushes away o ing technique, it is characterized in that: in described step 4, the first half module level is arranged on hot press pressure head, and the second half module level is arranged on hot press work top.
4. hollow blade according to claim 2 pushes away o ing technique, it is characterized in that: in described step 4, the first half module is uprightly arranged on hot press work top also fixing, second half module is uprightly arranged on the removable slide block of hot press workbench, and chuck is arranged on hot press pressure head also fixing.
5. the hollow blade according to claim 3 or 4 pushes away o ing technique, it is characterized in that: described first half module is identical with the material of the second half module, with location guide device on described mould structure.
6. hollow blade according to claim 5 pushes away o ing technique, it is characterized in that: described high-temperature lubricant is boron nitride high-temperature lubricant or graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310508213.0A CN103551472B (en) | 2013-10-25 | 2013-10-25 | A kind of hollow blade pushes away o ing technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310508213.0A CN103551472B (en) | 2013-10-25 | 2013-10-25 | A kind of hollow blade pushes away o ing technique |
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| CN103551472A CN103551472A (en) | 2014-02-05 |
| CN103551472B true CN103551472B (en) | 2015-09-09 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104646465B (en) * | 2015-03-19 | 2017-01-18 | 苏州明和行新材料科技有限公司 | Multi-section and synchronous torsion formation method of hollow blade |
| CN106734629B (en) * | 2017-01-16 | 2019-02-01 | 北京机科国创轻量化科学研究院有限公司 | A kind of three station transport equipment of superplastic forming |
| CN107671152B (en) * | 2017-09-20 | 2019-01-11 | 南京航空航天大学 | A kind of cross-section hollow fan blade low-angle torsion method based on stress relaxation |
| CN111843402B (en) * | 2020-08-07 | 2021-09-21 | 陕西智拓固相增材制造技术有限公司 | Machining method of wide chord blade |
| CN113182405B (en) * | 2021-04-30 | 2022-11-18 | 北京航空航天大学 | Thermal torsion forming method of titanium alloy hollow blade and torsion assembly thereof |
| CN113857346B (en) * | 2021-09-26 | 2024-01-09 | 北京航空航天大学 | Hollow blade thermoforming method and hollow blade inflation device |
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| EP0771598A1 (en) * | 1995-11-09 | 1997-05-07 | Benteler Ag | Process for reducing the friction by hydraulic forming with internal high pressure and device for hydraulic forming |
| EP1027969A1 (en) * | 1998-04-07 | 2000-08-16 | Yuugen Kaisha Niimitekkou | Metal mold and press device |
| JP2004351488A (en) * | 2003-05-29 | 2004-12-16 | Calsonic Kansei Corp | Method for producing tubular member having partition plate by hydraulic forming |
| CN201455060U (en) * | 2009-11-23 | 2010-05-12 | 佛山市南海大和钢结构有限公司 | Thermal thrust bending mechanism |
| EP2184119A2 (en) * | 2008-11-10 | 2010-05-12 | Rolls-Royce plc | Forming apparatus |
| CN102554009A (en) * | 2011-12-26 | 2012-07-11 | 北京航空航天大学 | Fluid pressure forming method for small-radius elbow |
-
2013
- 2013-10-25 CN CN201310508213.0A patent/CN103551472B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0771598A1 (en) * | 1995-11-09 | 1997-05-07 | Benteler Ag | Process for reducing the friction by hydraulic forming with internal high pressure and device for hydraulic forming |
| EP1027969A1 (en) * | 1998-04-07 | 2000-08-16 | Yuugen Kaisha Niimitekkou | Metal mold and press device |
| JP2004351488A (en) * | 2003-05-29 | 2004-12-16 | Calsonic Kansei Corp | Method for producing tubular member having partition plate by hydraulic forming |
| EP2184119A2 (en) * | 2008-11-10 | 2010-05-12 | Rolls-Royce plc | Forming apparatus |
| CN201455060U (en) * | 2009-11-23 | 2010-05-12 | 佛山市南海大和钢结构有限公司 | Thermal thrust bending mechanism |
| CN102554009A (en) * | 2011-12-26 | 2012-07-11 | 北京航空航天大学 | Fluid pressure forming method for small-radius elbow |
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Granted publication date: 20150909 Termination date: 20201025 |