CN103551472A - Push-bending forming process for hollow blade - Google Patents
Push-bending forming process for hollow blade Download PDFInfo
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- CN103551472A CN103551472A CN201310508213.0A CN201310508213A CN103551472A CN 103551472 A CN103551472 A CN 103551472A CN 201310508213 A CN201310508213 A CN 201310508213A CN 103551472 A CN103551472 A CN 103551472A
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Abstract
The invention discloses a push-bending forming process for a hollow blade. The process comprises producing a mould cavity curved surface according to a finished product hollow blade appearance curved surface; machining a mould according to the mould cavity curved surface and forming a mould cavity passage with two open sides in the mould; designing a chuck according to the blade tenon shape; fixing the chuck and the mould on a hot press; coating high-temperature lubricants on the inner surface of the mould cavity and the surface of a blade blank; mounting the blade blank on the chuck. The hot press acts, the mould is closed, the chuck drives the blade to move towards the mould to push the blade into the mould cavity from one end of the mould cavity passage, and the blade is forced to be bent under the action of the mould cavity inner surface and is subjected to torsional deformation; the mould is opened after the torsional deformation is kept for certain time, and the formed blade is dismounted. According to the process, slab hollow blade blanks can be formed into complex torsional forms and are provided with required torsion angles, the forming process is stable and convenient and fast, the speed is controllable, deformation distribution of all parts are uniform, and the 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-engines are used is in order to meet the requirement of its aerodynamic configuration, and blade profile is usually with complicated torsion angle.The curved profile of this distortion has been brought huge difficulty to the processing and manufacturing of blade.Particularly for the blade with hollow Lightened structure, its loss of weight position inner hollow, exterior panel is little thickness thin plate.Panel only has the support of reinforcement at regional area, most of in vacant state.This class 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 its inner reinforcement has hindered flowing of panel material in torsional deflection on the other hand.Hollow blade is very easy to produce forming defects in torsion.
For the complicated torsional angle that is shaped on blade, the most widely used technique is to use twisting fixture to carry out bending shaping at present.Wherein single chuck bending is shaped and uses a pair of chuck, and tenon and the blade tip position of clamping respectively blade, relatively rotate angle by giving two chucks, and blade twist is shaped.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 that produced by torsional moment is very little; The hollow area that blade middle part and solid area are closed on, because torsional rigidity is undergone mutation, and than blade root position thinner thickness, torsional rigidity is low, opposing torque capability is poor, and in shaping, most of torsional deflection concentrates on this, causes herein blade panel to be turned round unstability serious.Therefore when shaping hollow blade, single chuck reverses the workpiece obtaining, and windup-degree distributes very inhomogeneous, and forming defects is many, and quality is unstable.Many chucks bending technique, on the basis of single chuck bending technique, has increased the clamping head of some auxiliary torsions at blade middle part, by giving the different reverse speed of each chuck and angle, come twist blade to arrive required angle.But many chucks reverse equipment owing to having increased inner auxiliary chuck, complex structure, makes to reverse shaping equipment volume and increases, and cost improves.As a rule, the shaping of blade generally need be carried out under heated condition, 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, so 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, it has overcome, and existing hollow blade torsion shaping technological effect is unstable, equipment is complicated, the many problems of the rear defect that is shaped, and has greatly improved product quality, has improved production efficiency; Simultaneously hollow blade of the present invention pushes away the o ing technique complicated twisting contour that dull and stereotyped hollow blade blank can be shaped, and makes it possess required torsion angle, and 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 blades 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 1: 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 obtaining, form the die cavity passage of a both sides opening on described mould, one of them opening is for pushing blade;
Step 3: the chuck that is designed for clamping blade according to blade tenon shape;
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 chuck band moving vane moves towards mould, and blade is pushed mold cavity from die cavity passage one end, and blade, in going deep into the process of die cavity, is forced to bending under the effect of mold cavity inner surface, and distortion twists;
Step 8: keep after certain hour, mould is opened, the backhaul of blade chuck, shifts out mould by completing the blade that pushes away o ing, pulls down the blade being shaped, and completes an operation cycle.
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 and fixes, 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 and fixes.
Described the first half module is identical with the material of the second half module, on described mould structure with location guide device.
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 coordinates hot press to push away o ing to go out the required torsion angle of hollow blade with pushing away curved mould, substituted original technique of reversing shaping hollow blade with torsion equipment, than technique before, push-bending process has overcome because the differ greatly distortion that causes of hollow blade torsional rigidity each several part is concentrated, with and the problem such as the torsion rear blade panel depression that causes is excessive, forming effect obviously improves;
(2) push away the defects such as curved process Leaf and mould Contact area are large, and contact area constantly shifts, the indentation of difficult generation panel, in lubricated normal situation, forming process is steady, and each position deflection of blade is evenly distributed, forming defects is little, constant product quality;
(3) adopt and to push away curved mould and push away curvedly, technological parameter is easy to control, and by adjusting the gap between two die faces, can control easily and push away curved effect, and pushing away o ing speed can regulate by controlling hot press operational factor;
(4) push-bending process adopts, and to push away bending mould simple in structure, is convenient to design, in hot lower work-handling, changes easily;
(5) push-bending process is easy to realize aborning automation, can greatly improve the production efficiency with the hollow blade of complicated torsion angle.
Accompanying drawing explanation
Fig. 1 is finished product hollow blade profile 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-the first half module, 2-the second half module, 3-chuck, 4-blade; 5-mold cavity passage.
The specific embodiment
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 1: 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 obtaining, form the die cavity passage of a both sides opening on described mould, one of them opening is for pushing blade;
Step 3: the chuck that is designed for clamping blade according to blade tenon shape;
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 chuck band moving vane moves towards mould, and blade is pushed mold cavity from die cavity passage one end, and blade, in going deep into the process of die cavity, is forced to bending under the effect of mold cavity inner surface, and distortion twists;
Step 8: keep after certain hour, mould is opened, the backhaul of blade chuck, shifts out mould by completing the blade that pushes away o ing, pulls down the blade being shaped, and completes an operation cycle.
Enumerating two kinds of embodiment below comes concrete elaboration hollow blade of the present invention to push away o ing technique.
The first embodiment:
1. according to finished product hollow blade appearance curved surface, generate mould cavity curved surface.
2. according to the mould cavity curved surface processing mold obtaining.
3. the first half module 1 level is arranged on hot press pressure head, and the second half module 2 levels are 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) shaping hollow blade blank is arranged on chuck 3, sends into heating in stove;
(2) hot press pressure head is descending, and the first half module 1 and the second half module 2 close;
(3) chuck 3, to mould motion, pushes mould by blade 4 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, pulls out mould by pushing away the blade that o ing finishes, and completes an operation cycle.
The second embodiment:
1. according to finished product hollow blade appearance curved surface, generate mould cavity curved surface.
2. according to the mould cavity curved surface processing mold obtaining.
3. the first half module 1 be uprightly arranged on hot press work top and fix, 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 and fixes, 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, and the first half module 1 and the second half module 2 close;
(3) hot press pressure head is descending, and band moving vane moves towards mould, and blade is pushed to mould from mold cavity passage one end, and blade torsional bending under mould action is shaped;
(4) workbench slide block moves, and mould is opened;
(5) hot press pressure head backhaul, pulls out mould by pushing away the blade that o ing finishes, and completes an operation cycle.
At above-mentioned the first embodiment and the second embodiment Leaf, pushing away curved deformation temperature is 700 ℃-800 ℃.
In above-mentioned the first embodiment and the second embodiment, at mold cavity surface coated with high temperature lubricant, at blade surface coated with high temperature lubricant, mould and blade are heated to 750 ℃, insulation a period of time reaches samming.
The high-temperature lubricant adopting in above-mentioned the first embodiment and the second embodiment is boron nitride high-temperature lubricant or graphite.
Because blade twist angle is large, after pushing away o ing and putting in place, blade has had the complicated torsion angle of approximate die cavity shape, in the process of returning, can interfere with mould, cannot directly extract the blade after shaping out.Therefore the Design of Dies using in above-mentioned the first embodiment and the second embodiment is two half modules that can folding, can push away after being bent to position and open at blade, to take out, pushes away the blade that o ing completes.
In first embodiment of the invention and the second embodiment, two half module materials are identical, separately manufacture.On mould structure with location guide device.
In above-mentioned the 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, by the surface boundary blade profile curved surface of certain distance after being extended that stretch out.Fix one and extend rear curved surface invariant position, another is extended to curved surface and be outwards offset certain distance as die clearance.In two embodiment of the present invention, fixedly blade back N-Side surf invariant position, towards outer skew 10mm, obtains two mould cavity curved surfaces by leaf pelvic curvature;
2. according to shaping blade profile, draw out the rule of approximate finished product profile and reverse 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 1: 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 obtaining, form the mold cavity passage of a both sides opening on described mould, one of them opening is for pushing blade;
Step 3: the chuck that is designed for clamping blade according to blade tenon shape;
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 chuck drives blade blank to move towards mould, through opening, blade is pushed mold cavity from die cavity passage one end, blade, in going deep into the process of die cavity, is forced to bending under the effect of mold cavity inner surface, and distortion twists;
Step 8: keep after certain hour, mould is opened, the backhaul of blade chuck, shifts out mould by completing the blade that pushes away o ing, pulls down the blade being shaped, and completes an operation cycle.
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 and fixes, 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 and fixes.
5. according to a kind of hollow blade described in any one in claim 1-4, push away o ing technique, it is characterized in that: described the first half module is identical with the material of the second half module, on described mould structure with location guide device.
6. a kind of 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.
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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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| 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 true CN103551472A (en) | 2014-02-05 |
| CN103551472B CN103551472B (en) | 2015-09-09 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104646465A (en) * | 2015-03-19 | 2015-05-27 | 苏州明和行新材料科技有限公司 | Multi-section and synchronous torsion formation method of hollow blade |
| CN106734629A (en) * | 2017-01-16 | 2017-05-31 | 机械科学研究总院先进制造技术研究中心 | A kind of station transport equipment of superplastic forming three |
| CN107671152A (en) * | 2017-09-20 | 2018-02-09 | 南京航空航天大学 | A kind of uiform section hollow fan blade low-angle based on stress relaxation reverses method |
| CN111843402A (en) * | 2020-08-07 | 2020-10-30 | 陕西智拓固相增材制造技术有限公司 | Machining method of wide chord blade |
| CN113182405A (en) * | 2021-04-30 | 2021-07-30 | 北京航空航天大学 | Thermal torsion forming method of titanium alloy hollow blade and torsion assembly thereof |
| CN113857346A (en) * | 2021-09-26 | 2021-12-31 | 北京航空航天大学 | Hollow blade thermal forming method and hollow blade inflating device |
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Patent Citations (6)
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104646465A (en) * | 2015-03-19 | 2015-05-27 | 苏州明和行新材料科技有限公司 | Multi-section and synchronous torsion formation method of hollow blade |
| 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 |
| CN106734629A (en) * | 2017-01-16 | 2017-05-31 | 机械科学研究总院先进制造技术研究中心 | A kind of station transport equipment of superplastic forming three |
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| CN107671152A (en) * | 2017-09-20 | 2018-02-09 | 南京航空航天大学 | A kind of uiform section hollow fan blade low-angle based on stress relaxation reverses method |
| CN111843402A (en) * | 2020-08-07 | 2020-10-30 | 陕西智拓固相增材制造技术有限公司 | Machining method of wide chord blade |
| 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 |
| CN113182405A (en) * | 2021-04-30 | 2021-07-30 | 北京航空航天大学 | Thermal torsion forming method of titanium alloy hollow blade and torsion assembly thereof |
| CN113857346A (en) * | 2021-09-26 | 2021-12-31 | 北京航空航天大学 | Hollow blade thermal forming method and hollow blade inflating device |
| 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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| CN103551472B (en) | 2015-09-09 |
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Granted publication date: 20150909 Termination date: 20201025 |