CN109396676A - The method for controlling three layers of hollow interlayer body structure surface trench defect - Google Patents
The method for controlling three layers of hollow interlayer body structure surface trench defect Download PDFInfo
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- CN109396676A CN109396676A CN201811516053.3A CN201811516053A CN109396676A CN 109396676 A CN109396676 A CN 109396676A CN 201811516053 A CN201811516053 A CN 201811516053A CN 109396676 A CN109396676 A CN 109396676A
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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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
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Abstract
The present invention relates to the methods of three layers of hollow interlayer body structure surface trench defect of control of welding technology field.This method comprises: carrying out high energy beam modification to the diffusion connecting portion two sides of the upper surface of titanium alloy plate and lower panel, the gradient structure with high temperature hot deformation resistance is obtained, the local deformation on connecting portion periphery when inhibiting superplastic forming；Cleaning treatment is carried out to the surface with the upper surface of gradient structure plate, lower panel and core plate；Upper jacket compatible with the size of top panel and lower panel and lower jacket are prepared, resistance of deformation of jacket and the lower jacket is higher than the plastic deformation resistance of titanium alloy face on this；Lamination is carried out from bottom to up after the coating of lower jacket, lower panel, core plate, top panel and upper jacket is stopped solder flux, the structure surrounding welding after lamination is sealed, and reserved venthole；Upper jacket and lower jacket are removed after realizing diffusion connection and superplastic forming to the seal structure heating pressurization after lamination soldering and sealing.
Description
Technical field
The present invention relates to welding technology fields, more particularly to a kind of three layers of hollow interlayer body structure surface trench defect of control
Method.
Background technique
Superplastic forming/Diffusion bonding techniques have near-net-shape in manufacture hollow structural component, and good integrity, rigidity is high, if
The advantages such as freedom degree is big are counted, are had a wide range of applications in fields such as Aeronautics and Astronautics.The number of plies of plate needed for being manufactured according to structure,
Its process structure can be divided into single layer, two layers, the structures such as three layers and four layers, and wherein one of difficulties for forming of three-decker is surface ditch
Slot defect is difficult to control, and reduces trench defect generally by skin thickness is increased, and therefore, construction weight increased,
Limit its use scope and structure design margin.It, can also be by increasing covering other than increasing skin thickness and reducing groove
The number of plies covers groove by exterior skin, however, the part performance that this method shapes is difficult to meet design requirement.
For three-decker (including intermediate core plate and two sides skin panel), with engineering experience, during usual skin thickness is
Between 3 times or more of core thickness could obtain part of the surface without trench defect, and as the increase covering of cavity height is thick
Degree increases, and then by surface reduction processing, will reach design requirement, the method waste of material after the extra thickness removal of covering
Seriously, especially to the higher part of cavity height, process is more, and process is complicated.Second scheme is divided again outside two side skins
Not Zeng Jia by one layer of covering, by outmost two layers of covering by groove " cover " generated in intermediate tri-layer structure forming process
It obtains the part of surfacing, is often crackle for the groove of the part institute " cover " of dynamic performance requirements in this scheme
Source, the method require structural intergrity undesirable.
Therefore, the method for three layers of hollow interlayer body structure surface trench defect of control is inventor provided.
Summary of the invention
The embodiment of the invention provides the methods of three layers of hollow interlayer body structure surface trench defect of control, by with gradient
The technique blank design method of the covering combination Hard Roll set of tissue can avoid the generation of titanium alloy three-decker surface grooves defect.
The embodiment of the present invention proposes a kind of method for controlling three layers of hollow interlayer body structure surface trench defect, this method
Include:
Gradient structure is obtained, high energy beam is carried out to the diffusion connecting portion two sides of the upper surface of titanium alloy plate and lower panel and is changed
Property processing, obtain have high temperature hot deformation resistance gradient structure, inhibit superplastic forming when connecting portion periphery local deformation；
Panel and core plate surface are handled, the surface with the upper surface of gradient structure plate and lower panel is carried out at cleaning
Reason, and cleaning treatment is carried out to the core plate of titanium alloy, so that top panel, lower panel and core plate is reached the surface of diffusion connection request
State；
Jacket is prepared, upper jacket compatible with the size of top panel and lower panel and lower jacket, the upper packet are prepared
The resistance of deformation of set and the lower jacket is higher than the plastic deformation resistance of titanium alloy face；
Lower jacket, lower panel, core plate, top panel and upper jacket are carried out lamination, plate below by lamination soldering and sealing from bottom to up
Non-diffusing connecting portion between core plate and between top panel and core plate is coated with only solder flux, and in the upper jacket
It is coated with only solder flux on the inside of the lower jacket, the structure surrounding welding after lamination is sealed, in core plate two sides when welding
Interlayer slot reservation venthole；
Diffusion connection and superplastic forming, heat up to the seal structure after lamination soldering and sealing and pressurize, top panel, lower panel difference
After realizing diffusion connection with core plate, upper jacket and lower jacket are removed after carrying out superplastic forming to core plate.
Further, the method for obtaining gradient structure includes using power for 3kW-3.5kW, speed of welding 2.5m/
The method for laser welding of min-3.5m/min carries out high energy beam modifying to the diffusion connecting portion two sides of top panel and lower panel
Processing obtains gradient structure.
Further, the method for obtaining gradient structure includes, using electro-beam welding method to top panel and following
The diffusion connecting portion two sides of plate carry out high energy beam modifying, obtain gradient structure.
Further, before the method for obtaining gradient structure, to the surface of the upper surface of titanium alloy plate and lower panel
Oil removing, cleaning are carried out, any surface finish is made, it is pollution-free.
Further, the method for stating diffusion connection includes that the seal structure after lamination soldering and sealing is heated to 800~820
DEG C, apply the air pressure of 1.2~2.0MPa to upper jacket and lower jacket, makes top panel and lower panel and core plate is in diffusion interconnecting piece
Realize diffusion connection in position.
Further, the method for the superplastic forming includes that will realize that the seal structure after diffusion connection is put into mold
In be heated to 775~810 DEG C, by core plate two sides reserve venthole be passed through high-purity argon gas, 2~4h of heat-insulation pressure keeping makes centre
Core plate superplastic forming obtains hollow interlayer structure after the complete pad pasting of covering.
Further, after the method for the superplastic forming, using high -pressure water cutting method by upper jacket and lower jacket
Removal obtains and shapes complete three layers of hollow structural component.
To sum up, the technique blank design method that the present invention uses the covering combination Hard Roll with gradient structure to cover eliminates three layers
Superplastic forming/diffusion bonding structure part surface grooves.It is higher than the super flow of three-layered node component using the resistance of deformation of Hard Roll set
The principle of shape drag inhibits to cause groove to generate since local deformation is too fast in forming process, and makes to have between covering and jacket
There is certain frictional force, prevents the local deformation near outer layer covering diffusion bonding pad；Made using the covering with gradient structure
The resistance of deformation of diffusion bonding pad increases under the high temperature conditions, to further suppress since tensile stress of the core plate to covering causes
Local deformation.Three-decker surface ditch can be eliminated using the technique blank design method that the covering combination Hard Roll of gradient structure covers
Slot obtains the hollow structural component that surface quality meets design requirement.In addition, increasing three-decker scope of design, covering and core
The original depth ratio of plate can reach 1:1, reduce milling process, improve stock utilization.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, it should be apparent that, drawings described below is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the upper covering of the embodiment of the present invention and lower covering carries out the position that high energy beam modification obtains gradient structure
Schematic diagram.
Fig. 2 is lamination assembly form schematic diagram.
Fig. 3 is the three layers of hollow interlayer structural schematic diagram obtained using present invention method.
Specific embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following embodiment it is detailed
Thin description and attached drawing cannot be used to limit the scope of the invention for illustratively illustrating the principle of the present invention, i.e., of the invention
It is not limited to described embodiment, covers equivalent modifications, replacement and improvement under the premise of without departing from the spirit of the present invention.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to accompanying drawings and in conjunction with the embodiments.
The embodiment of the invention provides a kind of methods for controlling three layers of hollow interlayer body structure surface trench defect.This method with
Illustrate for the panel and core plate of SP700 titanium alloy, at least include the following steps S110~step S120:
Step S110 is to obtain gradient structure, to the diffusion connecting portion two of the upper surface of SP700 titanium alloy plate and lower panel
Side carries out high energy beam modification, obtains the gradient structure with high temperature hot deformation resistance, connecting portion when inhibiting superplastic forming
The local deformation on periphery.
It further include that oil removing, clear is carried out to the surface of the upper surface of titanium alloy plate and lower panel before the method for this step
It washes, makes any surface finish, it is pollution-free.
In this step, ginseng as shown in Figure 1, obtain gradient structure method include, to SP700 titanium alloy use power for
3kW-3.5kW, the method for laser welding of speed of welding 2.5m/min-3.5m/min connect top panel with the diffusion of lower panel
Position two sides carry out high energy beam modification, obtain gradient structure.Either, using electro-beam welding method to top panel and
The diffusion connecting portion two sides of lower panel carry out high energy beam modification, obtain gradient structure.The height of modified gradient structure
Warm deformation drag is significantly greater than the high temperature hot deformation resistance at non-modified position, and then the part for being able to suppress corresponding modified position becomes
Shape also avoids connecting portion groove when superplastic forming and occurs.
Step S120 is to handle panel and core plate surface, equal to the surface with the upper surface of gradient structure plate and lower panel
Cleaning treatment is carried out, and to the carry out cleaning treatment of the core plate of titanium alloy, so that top panel, lower panel and core plate is reached diffusion and connects
Connect the surface state of requirement.
Step S130 is to prepare jacket, prepares upper jacket compatible with the size of top panel and lower panel and lower packet
The resistance of deformation of set, the upper jacket and the lower jacket is higher than the plastic deformation resistance of titanium alloy face.
Step S140 is lamination soldering and sealing, as shown in Fig. 2, by lower jacket, lower panel, core plate, top panel and upper jacket under
Supreme carry out lamination, the non-diffusing connecting portion between plate and core plate below and between top panel and core plate are coated with
Only solder flux, and it is coated with only solder flux on the inside of the upper jacket and the lower jacket, by the structure surrounding welding after lamination
Sealing, in the interlayer slot reservation venthole of core plate two sides when welding.
Step S150 is diffusion connection and superplastic forming, heats up and pressurizes to the seal structure after lamination soldering and sealing, top panel,
After lower panel realizes diffusion connection with core plate respectively, upper jacket and lower jacket are removed after carrying out superplastic forming to core plate.
In this step, the method for spreading connection includes that the seal structure after lamination soldering and sealing is heated to 800~820
DEG C, apply the air pressure of 1.2~2.0MPa to upper jacket and lower jacket, makes top panel and lower panel and core plate is in diffusion interconnecting piece
Realize diffusion connection in position.
The method of superplastic forming includes, and the seal structure after realizing diffusion connection is put into mold and is heated to 775~
810 DEG C, high-purity argon gas is passed through by the venthole that core plate two sides are reserved, 2~4h of heat-insulation pressure keeping makes intermediate core plate superplastic forming,
Hollow interlayer structure is obtained after the complete pad pasting of covering.
It further include use high -pressure water cutting method along jacket with skin panel lamination four after the method for superplastic forming
Week removes upper jacket and lower jacket, obtains and shapes complete three layers of hollow structural component, as shown in Figure 3.
It should be noted that in the present invention sheath material selection, need to have certain superplasticity (it is upper and lower to meet part
Requirement of the covering to superplastic deformation amount), and superplastic deformation drag is higher than the resistance of deformation of three-layered node construction material.The present invention is logical
It crosses and upper and lower covering diffusion connection two sides is surface-treated, obtain the higher coarse as-cast structure of high temperature hot deformation resistance, can adopt
The gradient structure met the requirements is obtained with the local high energy beam modification processing method such as laser welding or electron beam welding.According to design
It is required that reinforcing rib form, intermediate core plate tow sides preparation stop solder flux figure, at least coat and stop on jacket medial surface
Solder flux prevents from connecting between three-decker blank and jacket, and then intermediate core plate and exterior skin and jacket assembly, carry out soldering and sealing,
Jacket can the soldering and sealing together with blank, can also be fixed again with its spot welding after three-decker blank soldering and sealing, through three-decker hair
After base leak detection, after blank is heated to diffusion connection temperature, air pressure is applied to two sides and is diffused connection, completes exterior skin and core plate
Diffusion connection.It is gradually passed through the high-purity argon gas of certain air pressure to internal layer, makes diffusion blank that superplastic deformation, part patch gradually occur
Pressure maintaining is carried out after film.The forming that part is completed after the heat preservation of certain time, pressure maintaining is complete, using the method pair of high -pressure water cutting
Part periphery is cut, and is removed jacket, is obtained three layer hollow structural component of the surface without trench defect.
The above description is only an example of the present application, it is not limited to described above and shown in figure specific
Step and structure.Also, the detailed description to known method technology for brevity, is omitted here.The present invention is not being departed from
Range in the case where to those skilled in the art, various changes and changes are possible in this application.It is all the application's
Any modification, equivalent replacement, improvement and so within spirit and principle, should be included in claims hereof range
It is interior.
Claims (7)
1. the method for controlling three layers of hollow interlayer body structure surface trench defect, which is characterized in that the described method includes:
Gradient structure is obtained, the diffusion connecting portion two sides of the upper surface of titanium alloy plate and lower panel are carried out at high energy beam modifying
Reason, obtain have high temperature hot deformation resistance gradient structure, inhibit superplastic forming when connecting portion periphery local deformation；
Panel and core plate surface are handled, cleaning treatment is carried out to the surface with the upper surface of gradient structure plate and lower panel,
And cleaning treatment is carried out to the core plate of titanium alloy, so that top panel, lower panel and core plate is reached the surface shape of diffusion connection request
State；
Prepare jacket, prepare upper jacket compatible with the size of top panel and lower panel and lower jacket, the upper jacket and
The resistance of deformation of the lower jacket is higher than the plastic deformation resistance of titanium alloy face；
Lower jacket, lower panel, core plate, top panel and upper jacket are carried out lamination, plate and core below by lamination soldering and sealing from bottom to up
Non-diffusing connecting portion between plate and between top panel and core plate is coated with only solder flux, and in the upper jacket and institute
It states and is coated with only solder flux on the inside of lower jacket, the structure surrounding welding after lamination is sealed, in the layer of core plate two sides when welding
Between slot reservation venthole；
Diffusion connection and superplastic forming heat up pressurization to the seal structure after lamination soldering and sealing, and top panel, lower panel are respectively and core
After plate realizes diffusion connection, upper jacket and lower jacket are removed after carrying out superplastic forming to core plate.
2. the method for three layers of hollow interlayer body structure surface trench defect of control according to claim 1, which is characterized in that institute
Stating the method for obtaining gradient structure includes using power for 3kW-3.5kW, the laser of speed of welding 2.5m/min-3.5m/min
Welding method carries out high energy beam modification to the diffusion connecting portion two sides of top panel and lower panel, obtains gradient structure.
3. the method for three layers of hollow interlayer body structure surface trench defect of control according to claim 1, which is characterized in that institute
Stating the method for obtaining gradient structure includes, using electro-beam welding method to the diffusion connecting portion two sides of top panel and lower panel
High energy beam modification is carried out, gradient structure is obtained.
4. the method for three layers of hollow interlayer body structure surface trench defect of control according to claim 1, which is characterized in that
Before the method for obtaining gradient structure, oil removing, cleaning are carried out to the surface of the upper surface of titanium alloy plate and lower panel, make table
Face is bright and clean, pollution-free.
5. the method for three layers of hollow interlayer body structure surface trench defect of control according to claim 1, which is characterized in that institute
The method for stating diffusion connection includes that the seal structure after lamination soldering and sealing is heated to 800~820 DEG C, to upper jacket and lower packet
Set applies the air pressure of 1.2~2.0MPa, makes top panel and lower panel and core plate is realized in diffusion connecting portion and spreads connection.
6. the method for three layers of hollow interlayer body structure surface trench defect of control according to claim 1, which is characterized in that institute
The method for stating superplastic forming includes that will realize that the seal structure after spreading connection is put into mold to be heated to 775~810 DEG C,
It is passed through high-purity argon gas by the venthole that core plate two sides are reserved, 2~4h of heat-insulation pressure keeping makes intermediate core plate superplastic forming, and covering is complete
Hollow interlayer structure is obtained after full pad pasting.
7. the method for three layers of hollow interlayer body structure surface trench defect of control according to claim 1, which is characterized in that
After the method for the superplastic forming, upper jacket and lower jacket are removed using high -pressure water cutting method, it is complete to obtain forming
Three layers of hollow structural component.
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| CN201811516053.3A CN109396676B (en) | 2018-12-12 | 2018-12-12 | Method for controlling surface groove defects of three-layer hollow sandwich structure |
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| CN201811516053.3A CN109396676B (en) | 2018-12-12 | 2018-12-12 | Method for controlling surface groove defects of three-layer hollow sandwich structure |
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| CN110328495A (en) * | 2019-06-06 | 2019-10-15 | 南阳师范学院 | A kind of Ti2The manufacturing method and Ti of AlNb based alloy honeycomb2AlNb based alloy honeycomb |
| CN110860860A (en) * | 2019-12-03 | 2020-03-06 | 中国航空制造技术研究院 | Preparation method of metal ordered porous structure |
| CN112792153A (en) * | 2020-12-18 | 2021-05-14 | 北京航星机器制造有限公司 | Diffusion, stretching, chemical milling and composite forming method for aluminum alloy multilayer plate |
| CN115302210A (en) * | 2022-10-12 | 2022-11-08 | 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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| CN110328495A (en) * | 2019-06-06 | 2019-10-15 | 南阳师范学院 | A kind of Ti2The manufacturing method and Ti of AlNb based alloy honeycomb2AlNb based alloy honeycomb |
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| CN112792153A (en) * | 2020-12-18 | 2021-05-14 | 北京航星机器制造有限公司 | Diffusion, stretching, chemical milling and composite forming method for aluminum alloy multilayer plate |
| CN115302210A (en) * | 2022-10-12 | 2022-11-08 | 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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