CN103769482B - A kind of integral forming method of titanium alloy air intake duct part - Google Patents
A kind of integral forming method of titanium alloy air intake duct part Download PDFInfo
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- CN103769482B CN103769482B CN201410051713.0A CN201410051713A CN103769482B CN 103769482 B CN103769482 B CN 103769482B CN 201410051713 A CN201410051713 A CN 201410051713A CN 103769482 B CN103769482 B CN 103769482B
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Abstract
The invention belongs to a kind of panel beating and hot-working field, be specifically related to monolithic molding mould and the method for a kind of titanium alloy air intake duct part, mould includes upper die and lower die, and upper die and lower die are respectively provided with 2 lifting screws.The integral forming method of a kind of titanium alloy air intake duct part, it comprises the steps, heats in mould is fixed on thermoforming forcing press, and the circular blank after having been justified by circle is put into lower mold die cavity and completed preforming；Closure weldering in blank two ends after preforming, and tap into air pipe at end face weld, after die sinking will shape, part takes out, and is met the qualified parts of dimensional requirement.Its advantage is, is reasonably determined procedure position during part monolithic molding, thus selects mold parting surface at irregular cambered surface tangent line, itself is shaped as Irregular Boundary Surface, thus reducing mould cavity depth, beneficially stablizing of blank puts and shapes, and beneficially takes work after mould die sinking.
Description
Technical field
The invention belongs to a kind of panel beating and hot-working field, being specifically related to a kind of Large Size Special Shaped complex-curved titanium alloy thin wall component entirety superplastic forming die and method thereof, it is applicable to the precision form of the special-shaped curved constitutional details of metal material such as Aero-Space titanium alloy.
Background technology
Currently, Aerospace Products parts forward lightweight, complication and integration direction are developed, and increasing employing large scale complicated abnormal shape curved surface thin-wall member, such design of part is irregular contour, such as polygon or special-shaped curved.And the metal materials such as titanium alloy are owing to having, and density is little, intensity is high, and there is the outstanding advantages such as good heat-resisting, corrosion resistance, become the ideal structure material in Aero-Space leading-edge field.But due to titanium alloy performance characteristics, the resistance of deformation under common molding condition is big, elastic modelling quantity is little, after cold-press moulding resilience serious, cold forming processing is the most difficult；Due to such part irregular contour structures feature, it is impossible to solve by processes such as regular volume circle, spinning；And need when using ordinary hot process for stamping to shape to use and overlap mating die more, and can only sectional forming, also need to carry out hot school shape guarantee dimensional accuracy after each several part assembly welding, processing cost is higher, inefficient.And the development of Superplastic Technology, improve above-mentioned condition, can once-forming go out common process be difficult to the thin-wall member of the complicated shape shaped, and manufacturing procedure can be reduced, improve surface quality, shorten the manufacturing cycle, compared with traditional processing technique, there is the biggest advantage.And superplastic forming die is the important guarantee of titanium alloy component forming quality.
Summary of the invention
It is an object of the invention to provide a kind of monolithic molding mould and the method for titanium alloy air intake duct part, the shortcoming that when it can overcome ordinary hot process for stamping to shape, manufacturing procedure is many and relatively costly, effectively ensure the precision form of irregular slim body wall member.The part quality controllability processed and good stability, highly versatile, passing rate of processing is high.
The present invention is achieved in that the monolithic molding mould of a kind of titanium alloy air intake duct part, and it includes upper die and lower die, and upper die and lower die are respectively provided with 2 lifting screws.
Having direction recess in the bottom of upper mold, the top of upper mold is provided with guide ledges, and the inside of lower mold has annular boss.
A kind of integral forming method of titanium alloy air intake duct part, it comprises the steps,
(1) heat in the mould described in claim 1 is fixed on thermoforming forcing press, reach hot-forming temperature 700～when 750 DEG C, circular blank after having been justified by circle puts into lower mold die cavity, upper mold and lower mold as guide locating device provided, complete preforming by flat for circle circle part bat by the groove of both sides and boss；
(2) closure weldering in blank two ends after preforming, and tap into air pipe at end face weld, mould continues to be heated to superplastic forming temperature 900～when 950 DEG C, blank is placed again into mould, and upper and lower mould matched moulds forms near closed hollow ring, after being injected by argon, blank is gradually fitted with mold cavity, after heat-insulation pressure keeping, blank is fitted completely with die cavity, and annular boss has shaped reference reticle on part simultaneously.
(3) after die sinking will shape, part takes out, and is met the qualified parts of dimensional requirement.
It is an advantage of the invention that, part time job position has been carried out 7 ° of deflections, it is reasonably determined procedure position during part monolithic molding, thus select mold parting surface at irregular cambered surface tangent line, itself is shaped as Irregular Boundary Surface, thus reducing mould cavity depth, beneficially stablizing of blank puts and shapes, and beneficially takes work after mould die sinking；Upper and lower mould is designed groove and boss, as locating guide device during matched moulds, it is ensured that profile complete dislocation-free during mold closed condition；Make use of annular boss to shape reference reticle on part simultaneously, provide foundation for part cutting profile after superplastic forming.
Accompanying drawing explanation
Fig. 1 is the monolithic molding upper mould schematic diagram of a kind of titanium alloy air intake duct part provided by the present invention；
Fig. 2 is the monolithic molding lower mould schematic diagram of a kind of titanium alloy air intake duct part provided by the present invention；
Fig. 3 be lower mold and circle circle part put schematic diagram；
Fig. 4 is special-shaped curved part schematic diagram.
In figure, 1 upper mold, 2 lower molds, 3 lifting screws, 5 direction recess, 6 guide ledges, 7 annular boss, 8 circle parts.
Detailed description of the invention
With embodiment, the present invention is described in detail below in conjunction with the accompanying drawings:
Titanium alloy component is a kind of special-shaped curved thin-wall part, and its geomery as shown in Figure 4, in order to reduce mould cavity depth, put and shape, and beneficially takes work smoothly after mould die sinking by beneficially stablizing of blank, determines that process part processing carries out 7 ° of deflections.Taking process part processing maximum cross section is parting Surface Design superplastic forming die.
Fig. 1 and Fig. 2 is the monolithic molding upper mould of a kind of titanium alloy air intake duct part, lower mold schematic diagram, and this mould includes upper mold 1, lower mold 2, and upper mold 1, lower mold 2 are respectively provided with 2 lifting screws 3.Have direction recess 5 in the bottom of upper mold 1, the top of upper mold 1 is provided with guide ledges 6, and the inside of lower mold 2 has annular boss 7, as locating guide device during matched moulds, it is ensured that profile complete dislocation-free during mold closed condition；Make use of annular boss to shape reference reticle on part, provide foundation for part cutting profile after superplastic forming.
Circular blank after circle has been justified puts into mold cavity for the 1st time, and upper mold 1 and the 2-in-1 mould of lower mold complete preforming function；The blank two ends closure postwelding flattened after preforming puts into mold cavity for the 2nd time, and after upper mold 1 and the 2-in-1 mould of lower mold, at a temperature of super moulding, gas pressure compacting goes out qualified air intake duct part.Part time job position having carried out 7 ° of deflections, has rationally determined that mold parting surface, at irregular cambered surface tangent line, thus reduces mould cavity depth, beneficially stablizing of blank puts and shapes.
A kind of Large Size Special Shaped complex-curved titanium alloy thin wall component entirety superplastic forming method, is specifically completed by a set of superplastic forming die, specifically comprises the following steps that
(1) heat in this mould is fixed on thermoforming forcing press, reach hot-forming temperature 700～when 750 DEG C, circular blank after justify by circle puts into lower mold die cavity, and circle as guide locating device provided, is justified that part bat is flat completes preforming by the groove of both sides and boss by upper mold and lower mold.
(2) closure weldering in blank two ends after preforming, and tap into air pipe at end face weld, mould continues to be heated to superplastic forming temperature 900～when 950 DEG C, blank is placed again into mould, and upper and lower mould matched moulds forms near closed hollow ring, after being injected by the argon of certain air pressure, blank is gradually fitted with mold cavity, after heat-insulation pressure keeping, blank is fitted completely with die cavity, and annular boss has shaped reference reticle on part simultaneously.
(3) after die sinking will shape, part takes out, and is met the qualified parts of dimensional requirement.
Claims (1)
1. an integral forming method for titanium alloy air intake duct part, the monolithic molding mould of use includes
Mould, lower mold, upper die and lower die are respectively provided with 2 lifting screws；Direction recess is had in the bottom of upper mold,
The top of lower mold is provided with guide ledges, and the inside of lower mold has annular boss,
It is characterized in that: integral forming method comprises the steps,
(1) monolithic molding mould is fixed in thermoforming forcing press and heats, reach hot-forming temperature 700～
When 750 DEG C, the circular blank after having been justified by circle puts into lower mold die cavity, upper mold and lower mold leading by both sides
To groove and guide ledges as guide locating device provided, circular blank is clapped and flat completes preforming；
(2) closure weldering in blank two ends after preforming, and tap into air pipe, monolithic molding mould at end face weld
Continuing to be heated to superplastic forming temperature 900～when 950 DEG C, the blank that two ends block postwelding is placed again into whole
Body shaping dies, and blank operating position is carried out 7 ° of deflections, upper and lower mould matched moulds forms near closed hollow ring, will
Argon inject after, blank gradually with monolithic molding mold cavity fit, after heat-insulation pressure keeping, blank with
Die cavity is fitted completely, utilizes annular boss to shape reference reticle on blank simultaneously；
(3) after die sinking will shape, part takes out, and is met the qualified parts of dimensional requirement.
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| CN201410051713.0A CN103769482B (en) | 2013-10-22 | 2014-02-14 | A kind of integral forming method of titanium alloy air intake duct part |
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| CN201310499784.2 | 2013-10-22 | ||
| CN2013104997842 | 2013-10-22 | ||
| CN201310499784 | 2013-10-22 | ||
| CN201410051713.0A CN103769482B (en) | 2013-10-22 | 2014-02-14 | A kind of integral forming method of titanium alloy air intake duct part |
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| CN103769482A CN103769482A (en) | 2014-05-07 |
| CN103769482B true CN103769482B (en) | 2016-08-24 |
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| CN104289602B (en) * | 2014-09-29 | 2018-01-09 | 北京航星机器制造有限公司 | Moveable-combined type hot forming flanging die and application method |
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