CN202278134U - Superplastic forming system for titanium-alloy turbine blades - Google Patents
Superplastic forming system for titanium-alloy turbine blades Download PDFInfo
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- CN202278134U CN202278134U CN2011204084864U CN201120408486U CN202278134U CN 202278134 U CN202278134 U CN 202278134U CN 2011204084864 U CN2011204084864 U CN 2011204084864U CN 201120408486 U CN201120408486 U CN 201120408486U CN 202278134 U CN202278134 U CN 202278134U
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Abstract
The utility model discloses a superplastic forming system for titanium-alloy turbine blades. The system comprises a forging press and a control system, wherein the forging press is a hydraulic die forging machine, and comprises a forming die and a heating furnace; heating elements in the heating furnace are silicon carbide rods; and the control system comprises a constant pressure control system and a temperature control system. Through carrying out constant pressure control on the hydraulic forging press, the forming die of the forging press carries out pressing on blanks with a constant forming pressure. The temperature rising speed of the heating furnace is controlled by the temperature control system so as to heat the forming die and a blank, when the forming die and the blank meet superplastic conditions, a pressure under the conditions is exerted and kept; when a forge piece can be pressed under the pressure, the forge piece deforms at an appropriate deformation rate, and when the forge piece can not be pressed under the pressure, the blank stops deforming; meanwhile, under the superplastic conditions, the internals of the blank are dynamically recrystallized so as to achieve a new balance, then the blank begins to deform at an appropriate rate and finally meets the design requirements.
Description
Technical field
The utility model relates to a kind of superplasticforming system, particularly relates to a kind of titanium alloy turbine blade superplasticforming system, and it comprises forging press and control system; Be provided with finishing die and heating furnace in the forging press.
Background technology
The titanium alloy specific strength is big, and corrosion resistance is good, and fracture toughness, fatigue strength, low-temperature flexibility, high-temperature behavior tool are good.Owing to have good performance, receive the favor of leading-edge fields such as Aero-Space always.Existing simultaneously with many premium properties is that hot-working character is poor, and this is that titanium alloy perplexs a domestic and international manufacturing difficult problem.Superplasticforming is exactly the effective means that solves titanium alloy hot-working character difference both at home and abroad.This hot-working method can be forging and the device that the Chinese invention patent application documents of CN1048994 disclose a kind of large-size steam turbine titanium alloy linear leaf with reference to publication number.The technical scheme of this patent application adopts the mould structure of totally-enclosed, monolateral gap, dark detent; The nearly β that is employed in 20 ℃ of heating below the transformation temperature on the technology forges; And cut the step work step in the middle of between rough forge and finish forge, adopting; After final heat treatment, the low temperature pressurize that in mould, is lower than 20 ℃ of heating of heat-treatment of annealing temperature is proofreaied and correct.In general the used mode of heating of isothermal forging has three kinds: one is eddy-current heating, and it is fast that this method temperature is controlled accurate firing rate, but that shortcoming is an equipment is more expensive, equipment is complicated, is not suitable for producing in batches; The 2nd, resistance heated, device is simple and easy to make, but working life is shorter up and down at 1000 ℃; The 3rd, the Elema heating, this mode is comparatively economical, and (1300 ℃) working life is longer in the high-temperature region, but more crisp.Because stress-strain speed and temperature have very confidential relation, in general at stress one regularly, along with the raising of temperature, strain rate improves; And in a timing, temperature improves, stress decrease.For superplastic forming; People take much count of low stress and high strain rate; So what adopt is to adjust pressure to regulate the speed, consequently forging pressure is big, the forging vibration is big, the forging surplus is big, stock utilization is low, also can cause the Elema fracture.Though from basic condition, development superplasticforming technology also adopts Elema as the first source of heating part, is more reasonably to select.But for the vibration that reduces forging must be with the low velocity compacted part.And common press does not reach low like this speed, must customize special press to satisfy low deformation velocity, and such equipment manufacturing cost as a result is high but permanent deformation velocity does not still reach constant strain rate.
The utility model content
The technical problem that the utility model will solve provides a kind of titanium alloy turbine blade superplasticforming system; It carries out constant compression force control through a constant-voltage system to forging press; Make the speed of forging carry out the self adaptation adjustment, solve the problem that vibration causes the Elema fracture of forging according to the variation of material structure.
The above-mentioned technical problem of the utility model mainly is able to solve through following technical proposals: a kind of titanium alloy turbine blade superplasticforming system comprises forging press and control system; Be provided with finishing die and heating furnace in the forging press; Said forging press is the liquid pressing machine; Heating element heater in the said heating furnace is an Elema; Said control system comprises a control system of invariable pressure and a temperature control system.Particularly, said finishing die comprises upper die and lower die, and said upper die and lower die are connected on the base separately through some backing plates respectively and are separately fixed on the entablature and sill of forging press through a thermal insulation board and cooled plate separately.Said control system of invariable pressure comprises the constant forming pressure of 150 tons of controls.Said temperature control system comprises that it is 10 hours that the control heating furnace is heated to time of 930 ℃.Through hydraulic forging press being carried out constant voltage control, the finishing die of forging press is suppressed to blank with a constant forming pressure.Through heating furnace finishing die and blank are heated, when finishing die and blank satisfy the superplasticity condition, pressure when imposing this condition and pressurize; When this pressure was pressed movingly, forging was with suitable rate of deformation distortion, pressed when motionless, and blank stops distortion; Simultaneously, under the superplasticity condition, blank interior tissue dynamic recrystallization is out of shape with suitable speed with beginning after reaching a new balance, reaches designing requirement at last.
Because adopt pressure preferential, autologous tissue adjusts speed through forging.When finishing die and blank satisfy the superplasticity condition, pressure when imposing this condition and pressurize; When this pressure was pressed movingly, forging was with suitable rate of deformation distortion, pressed when motionless, and blank stops distortion; Simultaneously, under the superplasticity condition, blank interior tissue dynamic recrystallization is out of shape with suitable speed with beginning after reaching a new balance, reaches designing requirement at last.Adopt this method to need not to customize special devices, and can reach the iptimum speed that is fit to the forging distortion.Because speed is self-regulating, compared with other ausforming, vibrate much smallerly, make the frangible shortcoming of Elema be able to improve greatly.
Description of drawings
Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technical scheme of the utility model.
Fig. 1 is the system block diagram of the utility model.
Fig. 2 is the finishing die of forging press in the utility model and the structural representation of heating furnace.
Fig. 3 is the influence graph of a relation of temperature to blank material stress-strain speed.
Wherein, forging press A, the control B of system, control system of invariable pressure C, temperature control system D, entablature 1, sill 2, finishing die 3, patrix 301, counterdie 302, base 303, thermal insulation board 304, cooled plate 305, backing plate 306, heating furnace 4, body of heater 401, Elema 402.
The specific embodiment
Referring to Fig. 1 and Fig. 2, a kind of titanium alloy turbine blade superplasticforming system comprises forging press A and the control B of system.This forging press A is the liquid pressing machine, is provided with finishing die 3 and heating furnace 4.The B of control system comprises control system of invariable pressure C and temperature control system D.Finishing die 3 through control system of invariable pressure C forging press carries out constant pressure control, through temperature control system D the heating furnace 4 of forging press A is carried out temperature control.Heating element heater in the heating furnace 4 is an Elema 402.
Finishing die comprises patrix 301 and counterdie 302, and said patrix 301 is connected on the base 303 separately through four backing plates 306 respectively with counterdie 302 and is separately fixed on the entablature 1 and sill 2 of forging press A through a thermal insulation board 304 and cooled plate 305 separately.
When carrying out the forging of titanium alloy turbine blade; The blank that makes is preheated spraying TI5 glass lubricant after 80 ℃; Put into and be that heating element heater heat at heating furnace 4 with Elema 402 with finishing die 3, the time that is heated to 930 ℃ through temperature control system D control heating furnace 4 is 10 hours.At this moment, make the patrix 301 of finishing die 3 descending, and with 150 tons constant pressure blank is suppressed through the patrix of control system of invariable pressure C control forging press A.In compacting process, keep the pressure of forging press A constant, the rate of deformation of blank adapts to according to the variation of blank inner tissue structure automatically.
The stress-strain speed and the temperature of material have very confidential relation, and in general at stress one regularly, along with the raising of temperature, strain rate improves.For superplastic forming, people take much count of low stress and high strain rate.As if temperature is high more favourable more from this point, but true and exactly so.Referring to Fig. 3, see that in the drawings stress raises along with temperature and descends, stress reaches a minimum in the time of 930 ℃.Stress can rise on the contrary in the time of 950 ℃.
So, when finishing die 3 and blank all be in ultra when moulding condition, blank just under 150 tons of constant forming pressures by suitable rate of deformation distortion, when pressing when motionless, blank stops to be out of shape and to be in a packing stage; This time in stage amounts to and is about 5～8 minutes.Simultaneously, blank is under the superplasticity condition, and its interior tissue reaches a new balance through dynamic recrystallization, begins through repeatedly circulation, to reach designing requirement and depanning with suitable speed distortion again.At last, through the orthopedic drip molding that finally obtains qualified titanium alloy turbine blade.
Claims (5)
1. a titanium alloy turbine blade superplasticforming system comprises forging press and control system; Be provided with finishing die and heating furnace in the forging press; It is characterized in that: said forging press is the liquid pressing machine; Heating element heater in the said heating furnace is an Elema; Said control system comprises a control system of invariable pressure and a temperature control system.
2. superplasticforming according to claim 1 system; It is characterized in that: said finishing die comprises upper die and lower die, and said upper die and lower die are connected on the base separately through some backing plates respectively and are separately fixed on the entablature and sill of forging press through a thermal insulation board and cooled plate separately.
3. superplasticforming according to claim 1 and 2 system is characterized in that: said control system of invariable pressure comprises the constant forming pressure of 150 tons of controls.
4. superplasticforming according to claim 1 and 2 system is characterized in that: said temperature control system comprises that it is 10 hours that the control heating furnace is heated to time of 930 ℃.
5. superplasticforming according to claim 3 system is characterized in that: said temperature control system comprises that it is 10 hours that the control heating furnace is heated to time of 930 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204084864U CN202278134U (en) | 2011-10-25 | 2011-10-25 | Superplastic forming system for titanium-alloy turbine blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204084864U CN202278134U (en) | 2011-10-25 | 2011-10-25 | Superplastic forming system for titanium-alloy turbine blades |
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| Publication Number | Publication Date |
|---|---|
| CN202278134U true CN202278134U (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204084864U Expired - Lifetime CN202278134U (en) | 2011-10-25 | 2011-10-25 | Superplastic forming system for titanium-alloy turbine blades |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106312018A (en) * | 2016-11-10 | 2017-01-11 | 无锡市明盛强力风机有限公司 | Process for superplasticity die forging of magnesium alloy hub |
| CN106312017A (en) * | 2016-11-10 | 2017-01-11 | 无锡市明盛强力风机有限公司 | Process for superplasticity die forging of magnesium alloy hub |
-
2011
- 2011-10-25 CN CN2011204084864U patent/CN202278134U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106312018A (en) * | 2016-11-10 | 2017-01-11 | 无锡市明盛强力风机有限公司 | Process for superplasticity die forging of magnesium alloy hub |
| CN106312017A (en) * | 2016-11-10 | 2017-01-11 | 无锡市明盛强力风机有限公司 | Process for superplasticity die forging of magnesium alloy hub |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120620 |
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| CX01 | Expiry of patent term |