CN109202255B - Three layers of hollow structural component of thin-walled and the method for controlling surface trench defect - Google Patents
Three layers of hollow structural component of thin-walled and the method for controlling surface trench defect Download PDFInfo
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- CN109202255B CN109202255B CN201711340233.6A CN201711340233A CN109202255B CN 109202255 B CN109202255 B CN 109202255B CN 201711340233 A CN201711340233 A CN 201711340233A CN 109202255 B CN109202255 B CN 109202255B
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- layers
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- structural component
- walled
- hollow structural
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
- B23K20/023—Thermo-compression bonding
- B23K20/026—Thermo-compression bonding with diffusion of soldering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/053—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure characterised by the material of the blanks
- B21D26/055—Blanks having super-plastic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/053—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure characterised by the material of the blanks
- B21D26/059—Layered blanks
Abstract
The invention discloses a kind of methods of three layers of hollow structural component control surface trench defect of thin-walled, include the following steps, 1) according to design shape, on core plate two sides, coating stops solder flux figure, only solder flux is respectively coated on the inside of two jackets；2) it is sequentially overlapped exterior skin and jacket respectively in core plate two sides, and superimposed sub-assembly is sealed around, while reserves air flue between core plate and the exterior skin of two sides；3) sub-assembly is implemented core plate to connect with the diffusion of exterior skin；4) implement the progressive superplastic forming of the first step；5) implement the progressive superplastic forming of second step；6) removal jacket obtains three layers of hollow structural component of thin-walled.Three layers of hollow structural component of thin-walled are also disclosed simultaneously, three-decker surface grooves can be effectively reduced using the technique Blank Design of jacket and the control method of progressive molding, obtain the hollow structural component that surface quality meets design requirement.
Description
Technical field
The present invention relates to titanium alloy manufacturing technology fields, more particularly to a kind of three layers of hollow structural component of thin-walled and control table
The method of face trench defect.
Background technique
Superplastic forming (Super plastic Forming, SPF) is using the superplasticity of material come one kind of forming part
Process.SPF Technology can produce the labyrinth that common process is difficult to shape, and not spring back, Neng Goubao
The precision of molded parts is demonstrate,proved, machining reproducibility is good.Diffusion connection (Diffusion Bonding, DB) is to utilize connected material
The surface of material makes contact surface under the conditions of being not enough to cause the pressure of plastic deformation and lower than the temperature of connected workpiece fusing point
The method for forming connection by solid-state diffusion mutual between atom.
If a kind of material is provided simultaneously with superplasticity and diffusion connection performance, the two required temperature and pressure condition are again very
It is close, then superplastic formation and diffusion connection can be completed in a thermal cycle, here it is super modeling/diffusion assembling process
Technology.Superplastic forming/Diffusion bonding techniques (SPF/DB) are in manufacture hollow structure compared with the part of conventional fabrication processes manufacture
Part has near-net-shape, good integrity, and the advantages such as rigidity is high, and design freedom is big have extensive in fields such as Aeronautics and Astronautics
Using.The number of plies of plate needed for manufacturing according to structure, process structure can be divided into single layer, two layers, the structures such as three layers and four layers,
One of difficulties for forming of middle three-decker is difficult to control for surface grooves defect, is lacked by increasing exterior skin thickness to reduce groove
It falls into, therefore, construction weight increased, and limit its use scope and structure design margin.Subtract in addition to increasing exterior skin thickness
Except few groove, groove can also be covered by exterior skin, however, this method shapes by increasing the plate number of plies to five layers
Part performance out is difficult to meet design requirement.
For three-decker, with engineering experience, usual exterior skin thickness, which is 3 times of intermediate core thickness or more, to be obtained
Part of the surface without trench defect, and as the increase exterior skin thickness of cavity height increases, place is then thinned by surface
Reason, will exterior skin it is extra thickness removal after reach design requirement, the method waste of material is serious, especially to cavity height compared with
High part, process is more, and process is complicated.Second scheme is to increase the plate number of plies to five layers, by covering outside outmost two layers
Groove " cover " generated in intermediate tri-layer structure forming process is obtained the part of surfacing by skin, right in this scheme
It is often formation of crack in the groove of the part institute " cover " of dynamic performance requirements, the method requires not structural intergrity
It is desirable.
Summary of the invention
The purpose of the present invention is being directed to technical deficiency existing in the prior art, and provide a kind of three layers of hollow structure of thin-walled
The method of surface trench defect is controlled in part and preparation process.
The technical solution adopted to achieve the purpose of the present invention is:
A kind of method of three layers of hollow structural component control surface trench defect of thin-walled, includes the following steps,
1) according to design shape, on core plate two sides, coating stops solder flux figure, is respectively coated on the inside of two jackets and only welds
Agent；
2) it is sequentially overlapped exterior skin and jacket respectively in core plate two sides, and superimposed sub-assembly is sealed around, simultaneously
Air flue is reserved between core plate and the exterior skin of two sides；
3) sub-assembly is implemented core plate to connect with the diffusion of exterior skin；
4) sub-assembly after diffusion connection is packed into the first mold and implements the progressive superplastic forming of the first step；
5) sub-assembly for completing the progressive superplastic forming of the first step is packed into the second mold and implements that second step is progressive super to be moulded into
Shape；
6) removal jacket obtains three layers of hollow structural component of thin-walled.
The ratio between original depth and the original depth of core plate of the exterior skin are 0.7-1.5.
The original depth of jacket and the original depth ratio of exterior skin are 1-2.
Core plate, exterior skin and the jacket soldering and sealing and obtains the sub-assembly after hunting leak together, alternatively, core plate and outer
Blank is made in covering soldering and sealing, and the jacket is fixedly connected with the blank spot welding.
It is heated in the step 3) and applies pressure and realize the diffusion connection.
Step 4), sub-assembly are put into the first mold and carry out one side of height of the cavity formed after progressive superplastic deformation to another
Side incrementally increases.
Sub-assembly in step 5) after first step gradual change forming is put into the second mold and carries out the progressive superplastic deformation of second step, group
The mold direction of component is opposite with the progressive superplastic forming of the first step.
The material of core plate and exterior skin is titanium alloy, and the material of jacket is titanium alloy or steel.
Jacket has the superplasticity for meeting requirement of the part exterior skin to superplastic deformation amount, while superplastic deformation drag is higher than
The resistance of deformation for the three-layered node construction material that core plate and exterior skin are constituted.
A kind of three layers of sky of thin-walled of the method preparation by three layers of hollow structural component control surface trench defect of thin-walled
Hearty cord component.
Compared with prior art, the beneficial effects of the present invention are:
The present invention can reduce thin-walled superplastic forming/diffusion using the technique Blank Design and progressive molding control method of jacket
Connect the surface grooves of three-layered node component.It is higher than the principle of the superplastic deformation drag of three-layered node component using the resistance of deformation of jacket
Inhibit to cause groove to generate since local deformation is too fast in forming process, and makes that there is certain rub between exterior skin and jacket
Power is wiped, the local deformation near exterior skin diffusion bonding pad is prevented；It is further suppressed using progressive molding control method due to becoming
Shape unevenly leads to the formation for shaping later period surface grooves.Using the technique Blank Design of jacket and the control method of progressive molding
Three-decker surface grooves can be effectively reduced, the hollow structural component that surface quality meets design requirement is obtained.
Detailed description of the invention
Fig. 1 show the structural schematic diagram that jacket of the invention, exterior skin and core plate constitute sub-assembly；
Fig. 2 show the structural schematic diagram for being diffused connection；
Fig. 3 show the structural schematic diagram for carrying out the progressive superplastic forming of the first step；
Fig. 4 show the structural schematic diagram for carrying out the progressive superplastic forming of second step.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
As shown, a kind of method of three layers of hollow structural component control surface trench defect of thin-walled, includes the following steps,
1) oil removing, cleaning are being carried out to panels such as core plate 1, exterior skin 2 and jackets 3, is making any surface finish, pollution-free, core plate
Reach the surface state of diffusion connection request with exterior skin；According to design shape, on 1 two sides of core plate, coating stops solder flux figure, two
Only solder flux is respectively coated in the inside of a jacket 3；
2) it is sequentially overlapped exterior skin 2 and jacket 3 respectively in core plate two sides, and superimposed 4 surrounding welding of sub-assembly is reached
It is sealed around to sealing state realization, while air flue is reserved between core plate and the exterior skin of two sides；By taking attached drawing as an example, air flue is located at
Section in vertical legend, that is, vertical screen direction.
3) sub-assembly 4 is implemented core plate 1 to connect with the diffusion of exterior skin 2；Specifically, sub-assembly 4 is heated to
After exterior skin 2 and the temperature of the diffusion connection of core plate 1, applies certain pressure P to upper and lower surface, realize exterior skin 2 and core plate 1
Diffusion connection in addition to only solder flux graphics field；
4) sub-assembly 4 after diffusion connection is packed into the first mold 5 and implements the progressive superplastic forming of the first step；It will spread
Sub-assembly 4 afterwards is packed into the first mold and is heated to superplastic deformation temperature, to logical by air flue between exterior skin 2 and intermediate core plate 1
Enter high-purity argon gas and implement superplastic deformation, then the heat-insulation pressure keeping predetermined time, makes the complete mold of jacket 3, then take out；
5) sub-assembly 4 for completing the progressive superplastic forming of the first step is packed into the second mold 6 and implements the progressive super modeling of second step
Forming；The sub-assembly 4 of first step forming will be completed, is packed into the second mold 6 and is heated to superplastic deformation temperature, to exterior skin 2 and core
High-purity argon gas is passed through by air flue between plate 1 and implements superplastic deformation；Then the heat-insulation pressure keeping predetermined time makes the complete mold of jacket 3
After come out of the stove；
6) removal jacket 3 obtains three layers of hollow structural component, is such as cut sub-assembly surrounding using high pressure water, then removal packet
Set 3 obtains three layers of hollow structural component.
The present invention can reduce thin-walled superplastic forming/diffusion using the technique Blank Design and progressive molding control method of jacket
Connect the surface grooves of three-layered node component.It is higher than the principle of the superplastic deformation drag of three-layered node component using the resistance of deformation of jacket
Inhibit to cause groove to generate since local deformation is too fast in forming process, and makes that there is certain rub between exterior skin and jacket
Power is wiped, the local deformation near exterior skin diffusion bonding pad is prevented；It is further suppressed using progressive molding control method due to becoming
Shape unevenly leads to the formation for shaping later period surface grooves.Using the technique Blank Design of jacket and the control method of progressive molding
Three-decker surface grooves can be effectively reduced, the hollow structural component that surface quality meets design requirement is obtained.
Wherein, the deflection of the first mold and the second mold is determined according to design chamber height, and a superplastic deformation is decomposed
It is generated twice or even three times or more, to can be effectively controlled groove.Specifically, to realize the gradual change superplastic deformation,
In step 4), sub-assembly be put into the first mold carry out the height of the cavity formed after progressive superplastic deformation from a side to the other side by
Step increases, for example wedge-shaped.That is, the bottom surface of the first mold is inclined-plane to constitute when tabular sub-assembly is put into the first mold
Wedge shape, or the stepping other shapes of height, such as curved face type, when being put into the second mold, because of sub-assembly at this time
Deformation plance is wedge shaped or the nonplanar structure of other variations, and the bottom surface of the second mold is that superplastic deformation can be realized in plane
Chamber incrementally increases, such as the superplastic deformation chamber of wedge shape, and sub-assembly deflection in step 5) after first step progressive molding is big
Side corresponds to the larger side of height of the wedge shape.It is passed through after argon gas since the section of superplastic deformation chamber is wedge shape, combination
Then part can be gradually transitions the other side from side elder generation mold.That is, then second of deformation quantity is small greatly for first time deformation quantity, pass through
The deformation distribution of different parts twice realizes three layers of hollow structural component forming of thin-walled.
Wherein, jacket has the superplasticity for meeting requirement of the part exterior skin to superplastic deformation amount, while superplastic deformation is anti-
Power is higher than the resistance of deformation for the three-layered node construction material that core plate and exterior skin are constituted, and jacket is plate, and size and core plate and
Exterior skin is identical, with a thickness of 1-2 times of exterior skin thickness.To achieve the above object, material selection and of thickness can be passed through
With realization, for different workpiece, different chamber height is then corresponding different, according to you can get it the reasonable design of experiment and experience,
Details are not described herein.Such as, the material of core plate and exterior skin is titanium alloy, and the material of jacket is titanium alloy or steel, passes through jacket two
The method of footwork progressive deformation control can effectively reduce the generation of titanium alloy three-decker surface grooves defect.
Wherein, the ratio between original depth of the original depth of the exterior skin and core plate is 0.7-1.5, preferably 0.8-
1.2, such as 1:1；The use of jacket, increases three-decker scope of design, and the original depth ratio of exterior skin and core plate can reach 1:
1, it is even more small, reduce milling process.
To realize that sub-assembly is fixed, the core plate 1, exterior skin 2 and jacket 3 soldering and sealing and obtain after hunting leak described together
Sub-assembly, of course, it is possible to after first core plate and exterior skin soldering and sealing are made blank and are hunted leak, the jacket and the blank point
Weldering is fixedly connected.Contact of the jacket with exterior skin makes have certain frictional force between exterior skin and jacket, prevents exterior skin from expanding
Dissipate the local deformation near bonding pad.
The above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of method of three layers of hollow structural component control surface trench defect of thin-walled, which is characterized in that include the following steps,
1) according to design shape, on core plate two sides, coating stops solder flux figure, and only solder flux is respectively coated on the inside of two jackets；
2) it is sequentially overlapped exterior skin and jacket respectively in core plate two sides, and superimposed sub-assembly is sealed around, while in core
Air flue is reserved between plate and the exterior skin of two sides；
3) sub-assembly is implemented core plate to connect with the diffusion of exterior skin；
4) sub-assembly after diffusion connection is packed into the first mold and implements the progressive superplastic forming of the first step；
5) sub-assembly for completing the progressive superplastic forming of the first step is packed into the second mold and implements the progressive superplastic forming of second step；
6) removal jacket obtains three layers of hollow structural component of thin-walled.
2. the method for three layers of hollow structural component control surface trench defect of thin-walled as described in claim 1, which is characterized in that institute
The ratio between original depth and the original depth of core plate of the exterior skin stated are 0.7-1.5.
3. the method for three layers of hollow structural component control surface trench defect of thin-walled as described in claim 1, which is characterized in that packet
The original depth of set and the original depth ratio of exterior skin are 1-2.
4. the method for three layers of hollow structural component control surface trench defect of thin-walled as described in claim 1, which is characterized in that institute
Core plate, exterior skin and the jacket stated soldering and sealing and obtain the sub-assembly after hunting leak together, alternatively, core plate and exterior skin soldering and sealing system
Blank is obtained, the jacket is fixedly connected with the blank spot welding.
5. the method for three layers of hollow structural component control surface trench defect of thin-walled as described in claim 1, which is characterized in that institute
It is heated in the step 3) stated and applies pressure and realize the diffusion connection.
6. the method for three layers of hollow structural component control surface trench defect of thin-walled as described in claim 1, which is characterized in that step
It is rapid 4), sub-assembly, which is put into the first mold, to carry out the height of the cavity formed after progressive superplastic deformation and gradually increases from a side to the other side
Greatly.
7. the method for three layers of hollow structural component control surface trench defect of thin-walled as described in claim 1, which is characterized in that step
It is rapid 5) in sub-assembly after first step progressive molding be put into the second mold and carry out the progressive superplastic deformation of second step, the mold of sub-assembly
Direction is opposite with the progressive superplastic forming of the first step.
8. the method for three layers of hollow structural component control surface trench defect of thin-walled as described in claim 1, which is characterized in that core
The material of plate and exterior skin is titanium alloy, and the material of jacket is titanium alloy or steel.
9. the method for three layers of hollow structural component control surface trench defect of thin-walled as described in claim 1, which is characterized in that packet
Covering has the superplasticity for meeting requirement of the part exterior skin to superplastic deformation amount, while superplastic deformation drag is higher than core plate and outer illiteracy
The resistance of deformation for the three-layered node construction material that skin is constituted.
10. a kind of method by three layers of hollow structural component control surface trench defect of the described in any item thin-walleds of claim 1-9
Three layers of hollow structural component of thin-walled of preparation.
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| CN109909506B (en) * | 2019-03-15 | 2021-09-07 | 航天材料及工艺研究所 | Titanium alloy air inlet channel member hot isostatic pressing forming die and hot isostatic pressing forming method |
| CN115302210B (en) * | 2022-10-12 | 2023-01-13 | 北京智创联合科技股份有限公司 | Control and compensation method for hot creep deformation of rocket titanium alloy nozzle |
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| CN101786223A (en) * | 2010-02-12 | 2010-07-28 | 中国航空工业集团公司北京航空制造工程研究所 | Manufacturing method of titanium alloy hollow component |
| CN102996510A (en) * | 2011-09-15 | 2013-03-27 | 中航商用航空发动机有限责任公司 | Hollow blade |
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