CN116330680B - Bonding assembly method for hollow fan outlet guide vane - Google Patents

Bonding assembly method for hollow fan outlet guide vane Download PDF

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Publication number
CN116330680B
CN116330680B CN202310564535.0A CN202310564535A CN116330680B CN 116330680 B CN116330680 B CN 116330680B CN 202310564535 A CN202310564535 A CN 202310564535A CN 116330680 B CN116330680 B CN 116330680B
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CN
China
Prior art keywords
cover plate
honeycomb
plate
main body
vacuum
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CN202310564535.0A
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Chinese (zh)
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CN116330680A (en
Inventor
周起帆
魏立峰
史奎
李锡川
沈鹏飞
徐鲲濠
崔慧然
徐进
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Wuxi Turbine Blade Co Ltd
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Wuxi Turbine Blade Co Ltd
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Priority to CN202310564535.0A priority Critical patent/CN116330680B/en
Publication of CN116330680A publication Critical patent/CN116330680A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/54—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive between pre-assembled parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/001—Joining in special atmospheres
    • B29C66/0012—Joining in special atmospheres characterised by the type of environment
    • B29C66/0014—Gaseous environments
    • B29C66/00145—Vacuum, e.g. partial vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
    • B29L2031/082—Blades, e.g. for helicopters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

According to the bonding assembly method for the hollow fan outlet guide vane, the adhesive film is used for bonding the main body part, the honeycomb plate and the cover plate together, then the main body part, the honeycomb plate and the cover plate are subjected to pressure curing in a vacuum state, the temperature required by heat curing is low, the structure of the blade cannot be influenced and changed excessively, the requirement of lightening the blade can be met, and meanwhile, the requirements of structural stability and mechanical strength among blade components are met. And the structure among the main body piece, the honeycomb plate and the cover plate is reinforced by using the edge sealing adhesive, so that the structural stability and the mechanical strength among the blade assemblies are improved. When the honeycomb plate and the cover plate are assembled, after the two assemblies are installed on the main body part based on the adhesive film and the adhesive, pressurization and heat curing are carried out between the three assemblies at the same time, and compared with the mode of solidifying the honeycomb plate and the cover plate step by step, the process is simplified, and the probability that the vacuum bag and the isolating film are damaged in the vacuumizing process by the sharp honeycomb structure is avoided.

Description

Bonding assembly method for hollow fan outlet guide vane
Technical Field
The application relates to the technical field of aero-engine blade manufacturing, in particular to a bonding assembly method of a hollow fan outlet guide vane.
Background
In order to meet the requirement of overall light weight, the hollow fan outlet guide vane of the aeroengine is provided with a hollow sandwich structure, and specifically as shown in fig. 1-3, main components of the guide vane comprise: a body member 1, a honeycomb panel 2 and a cover plate 3. Fig. 1 shows a body part 1, fig. 2 shows a honeycomb panel 2, and fig. 3 shows a cover plate 3; the main body part 1 is provided with a honeycomb cavity 1-1 and a cover plate cavity 1-2, and the honeycomb cavity 1-1 and the cover plate cavity 1-2 form a step cavity, as shown in fig. 3. To ensure that the overall light design objective is achieved, the body of the honeycomb panel 2 is a honeycomb structure 2-1. In assembly, the honeycomb plate 2 is required to be installed in the honeycomb cavity 1-1, then the cover plate 3 is pressed in the cover plate cavity 1-2, and meanwhile, the bottom of the cover plate 3 is required to be attached to the honeycomb plate 2, so that the three components are assembled into a whole. The overall shape of the assembled hollow fan outlet guide vane is shown in fig. 4, and fig. 5 is a schematic sectional view of the hollow fan outlet guide vane in the direction A-A in fig. 4. In order to maintain structural stability during assembly, a uniform honeycomb panel installation GAP (GAP 1 in the figure) is reserved between the edge of the honeycomb panel 2 and the inner wall of the honeycomb cavity 1-1, and a uniform cover panel cavity installation GAP (GAP 2 in the figure) is reserved between the edge of the cover panel 3 and the inner wall of the cover panel cavity 1-2.
There are also engine blades comprising honeycomb structures in the prior art, which are usually assembled using welding for engine blades comprising honeycomb structures. However, since the hollow fan outlet guide vane in the present application is a hollow sandwich-structured blade of the body member+honeycomb+cover plate designed to satisfy the light weight demand. If a welding mode is also used, firstly, metal is introduced in the welding process, and the design requirement of overall light weight is not met; secondly, in order to meet the light design requirement of the hollow fan outlet guide vane, the guide vane is made of aluminum alloy or titanium alloy, wherein the aluminum alloy is 7075 aluminum alloy, and the melting point is 475-636 ℃. The common welding method for welding the honeycomb is vacuum brazing, and the welding temperature is mostly above 1000 ℃, so that the structure and the performance of the 7075 aluminum alloy blade can be adversely affected. Therefore, the existing welding assembly method is not suitable for the assembly of the hollow fan outlet guide vane in the application.
Disclosure of Invention
In order to solve the problem that the existing engine blade welding assembly mode is not suitable for assembling the hollow fan outlet guide vane, the application provides the bonding assembly method of the hollow fan outlet guide vane, which can ensure the structural stability and the mechanical strength of the whole assembly on the basis that the hollow fan outlet guide vane meets the light weight requirement.
The technical scheme of the application is as follows: the bonding and assembling method of the hollow fan outlet guide vane is characterized by comprising the following steps of:
s1: preparing the main body piece, the honeycomb plate, the cover plate and the adhesive film before assembling;
determining an adhesion area of the honeycomb panel and the cover plate;
preparing a vacuum bag, a barrier film and an airfelt;
s2: the prepared adhesive films are respectively adhered to the cover plate and the bonding area of the honeycomb plate;
s3: placing the honeycomb plate in the center of a honeycomb cavity of a main body piece, wherein the edge of the honeycomb plate and the inner wall of the honeycomb cavity keep a uniform honeycomb plate installation gap;
after confirming that the honeycomb plate installation gap is a preset distance value, compacting the adhesive film on the honeycomb plate;
s4: confirming a location area on the honeycomb panel;
the positioning area is positioned on the upper end face of the honeycomb plate, and is a strip area which is uniformly equidistant with the edge of the honeycomb plate by taking the edge of the honeycomb plate as a starting point along the shape of the edge of the honeycomb plate;
s5: uniformly beating the uniformly stirred edge sealing adhesive in the honeycomb plate mounting gap and the positioning area;
cleaning the honeycomb plate mounting gap and the edge sealing adhesive outside the positioning area;
s6: the cover plate is installed in a cover plate cavity, and a uniform cover plate cavity installation gap is formed between the edge of the cover plate and the inner wall of the cover plate cavity;
after confirming that the cover plate installation gap is a preset distance value, compacting the adhesive film on the cover plate;
s7: sequentially covering the isolating film and the airfelt on the cover plate and being positioned above the bonding area on the cover plate;
s8: placing the barrier film, the airfelt and the pre-glued together blade members together into the vacuum bag;
uniformly arranging vacuum valves in the length direction and the width direction of the cover plate; at least 2 vacuum valves are arranged;
s9: the vacuum bag is prevented from being put into an autoclave, and the vacuum valve is connected with a vacuum pump pipeline to perform a pre-vacuum procedure;
s10: continuously vacuumizing, and stopping vacuumizing when the vacuum degree reaches a preset standard value;
closing a tank door of the autoclave, pressurizing and heating, and curing the adhesive film and the edge sealing adhesive;
s11: after the curing process is completed, fully cooling, and taking out the vacuum bag and the cured blade; and cleaning the blades to complete the assembly process of the outlet guide vane of the hollow fan.
It is further characterized by:
in step S1, the preparation work for the main body member, the honeycomb panel, the cover plate and the adhesive film includes:
a1: cleaning the bonding area by using a cleaning agent;
a2: the high-temperature adhesive tape is arranged on the main body piece at the position of the outer ring of the bonding area of the honeycomb plate and is used for protecting overflow glue along the edge of the honeycomb plate;
a3: a circle of high-temperature adhesive tape is arranged on the main body piece at the position of the outer ring of the bonding area on the cover plate along the edge of the cover plate to be used as overflow protection;
a4: cutting the adhesive film to obtain the adhesive film with the same shape as the bonding area of the honeycomb plate and the cover plate;
in step S7, the area of the airfelt is enough to cover each sharp point on the main body member, and the airfelt is used to cover the bonding area of the cover plate, at the same time, the airfelt is ensured to wrap each sharp point on the main body member;
in step S7, the method further includes the steps of:
secondarily wrapping each sharp point with airfelt specifically provided for each sharp point on the main body member;
the number of the vacuum valves is 2, and the vacuum valves are respectively arranged at 1/3 and 2/3 positions in the length direction of the cover plate;
the pre-vacuum procedure comprises the following operations:
b1: gradually increasing the air extraction amount with a preset frequency;
b2: in the air extraction process, confirming the tightness of the vacuum bag;
b3: in the air extraction process, the vacuum bag is adjusted at the structure switching position of the blade root and the blade top position on the main body part, so that the vacuum bag is attached to the shape of the blade, and the gap between the vacuum bag and the main body part is 0-0.5mm.
According to the bonding assembly method for the hollow fan outlet guide vane, the adhesive film is used for bonding the main body part, the honeycomb plate and the cover plate together, then the main body part, the honeycomb plate and the cover plate are subjected to pressure curing in a vacuum state, the temperature required by heat curing is low, the structure of the blade cannot be influenced and changed excessively, the requirement of lightening the blade can be met, and meanwhile, the requirements of structural stability and mechanical strength among blade components are met. And the structure among the main body piece, the honeycomb plate and the cover plate is reinforced by using the edge sealing adhesive, so that the structural stability and the mechanical strength among the blade assemblies are improved. When the honeycomb plate and the cover plate are assembled, after the two assemblies are installed on the main body part based on the adhesive film and the adhesive, the three assemblies are subjected to pressurization and heat curing at the same time, and compared with the mode of curing the honeycomb plate and the cover plate step by step, the method not only simplifies the working procedure, but also avoids the probability that the vacuum bag and the isolation film are damaged in the vacuumizing process of the sharp honeycomb structure; and in the process of pressurizing and thermosetting among the three components, the honeycomb plate is positioned in the height direction through the cover plate, and is positioned in the horizontal direction through the edge sealing adhesive, so that the honeycomb plate is ensured not to displace in the process of heating and curing, a positioning structure is not required to be arranged on the honeycomb plate independently, and the complexity of the procedure is reduced.
Drawings
FIG. 1 is a schematic structural view of a body member;
FIG. 2 is a schematic structural view of a honeycomb panel;
FIG. 3 is a schematic structural view of a cover plate;
FIG. 4 is a schematic structural view of a combined hollow fan outlet guide vane;
FIG. 5 is a schematic view of the structure of FIG. 4 in section in the direction A-A;
FIG. 6 is a schematic view of the structure of the honeycomb panel of the present method after it has been placed in the center of the honeycomb cavity of the body member;
FIG. 7 is a schematic view of the structure of FIG. 6 in section in the direction B-B;
FIG. 8 is a schematic view of the curing process in the present method;
FIG. 9 is an embodiment of a body member with a void between the structural interface and the vacuum bag;
FIG. 10 illustrates an embodiment of a vacuum bag conforming to the shape of the blade at the structural interface of the body member.
Detailed Description
The application comprises a bonding assembly method of a hollow fan outlet guide vane, which comprises the following steps.
S1: the preparation work before assembling the main body piece 1, the honeycomb board 2, the cover plate 3 and the adhesive film 5 is carried out; determining the bonding area of the honeycomb panel 2 and the cover plate 3; a vacuum bag 8, a barrier film 6 and a airfelt 7 are prepared.
As shown in fig. 7 and 8, the bonding area of the honeycomb panel 2 is arranged at the bottom of the honeycomb cavity 1-1 of the main body 1, and the portion of the honeycomb cavity 1-1 where the adhesive film 5 is arranged is the bonding area of the honeycomb panel 2. The bonding area of the cover plate 3 is arranged at the bottom of the cover plate 3, and in fig. 8, the part of the bottom of the cover plate, where the adhesive film 5 is arranged, is the bonding area of the cover plate. The specific shape and size of the bonding zone is adapted to the shape and size of the components in the hollow fan outlet guide vane.
The preparation work for the main body member 1, the honeycomb panel 2, the cover plate 3 and the adhesive film 5 includes the following.
a1: cleaning the bonding area by using a cleaning agent; in the embodiment, acetone is used as a cleaning agent, the surface of the part is scrubbed after the acetone is wetted by clean handkerchief, surface pollutants are removed, and the surface is clean and pollution-free after the cleaning agent is dried in the air.
a2: a high-temperature adhesive tape is arranged on the main body piece 1 at the position of the outer ring of the bonding area of the honeycomb plate 2 along the edge of the honeycomb plate;
a3: a circle of high-temperature adhesive tape is arranged on the main body piece 1 at the position of the outer ring of the bonding area on the cover plate 3 along the edge of the cover plate;
a4: the adhesive film 5 is cut to obtain the adhesive film 5 with the same shape as the bonding area of the honeycomb plate 2 and the cover plate 3.
In the present application, the high temperature adhesive tape is provided on the outer periphery of the honeycomb panel 2 in order to prevent the adhesive from being stuck to other places when the adhesive is injected by the adhesive gun in step S5, and the edge sealing adhesive is torn off after the honeycomb panel installation GAP1 is filled with the edge sealing adhesive. The high-temperature adhesive tape arranged on the outer ring of the cover plate 3 is used as overflow protection to remove overflow generated by the adhesive film in the bonding area of the cover plate 3 in the heat curing process, so that the high-temperature adhesive tape arranged on the outer ring of the cover plate 3 is torn off after heat curing.
In the concrete implementation, the adhesive film is taken out from the storage place, thawed for 5-15 minutes, and cutting lines are drawn on the adhesive film along the outer contour (single side is widened by 2-3 cm) of the cover plate and the honeycomb. Cutting off the adhesive film along the line.
The vacuum bag 8 is manufactured by the following steps: and cutting a vacuum bag with a proper size enough to wrap the blade, attaching a circle of sealing rubber strips on three sides, and folding the sealing rubber strips on one side for standby. The paper clothing on the other side of the sealing rubber strip is not torn off at the moment.
When the release film 6 is prepared, the cut size thereof can cover the whole cover plate bonding area. .
The airfelt 7 to be prepared in the present application includes: a airfelt 7 having an area sufficient to cover each sharp point on the main body member 1, and an airfelt 7 provided exclusively for each sharp point on the main body member 1; for each individual sharp point shape and size, airfelt 7 is cut to the proper shape to ensure that each sharp point is wrapped.
As shown in fig. 1, the main body 1 includes a plurality of sharp points, such as: the sharp part 1-3 at the blade root and the sharp part 1-4 at the blade tip. These sharp points, after being placed in the vacuum bag 8, puncture the vacuum bag 8 during the evacuation process. Therefore, special treatment is required for these sharp points to perform the vacuuming step. In the application, the airfelt 7 is used for carrying out important wrapping on the sharp part, so that the vacuum bag is prevented from being punctured. It is necessary to prepare a suitable airfelt 7 in advance according to the size and shape of the work.
A vacuum bag is prepared according to the size of the workpiece,
s2: and pre-sticking an adhesive film. The prepared adhesive films 5 are respectively adhered to the adhesive areas of the cover plate 3 and the honeycomb plate 2.
And tearing off the lining paper from which the adhesive film is cut off, and pasting the lining paper on a bonding area of the cover plate 3, wherein the pasting is performed as slowly as possible, and pasting is started from corners, and air bubbles in the lining paper are discharged. Ensure that the adhesive film is flatly stuck on the cover plate. And cutting off the allowance after the sticking is finished. And (3) adhering an adhesive film on the bonding area of the honeycomb plate in the same way. In the pasting process, if the adhesive film is torn off or the adhesive film is defective in the pasting process, the shape of the adhesive film can be complemented in a patch mode.
S3: placing the honeycomb plate 2 in the center of the honeycomb cavity of the main body piece 1, and keeping a uniform honeycomb plate installation gap between the edge of the honeycomb plate 2 and the inner wall of the honeycomb cavity;
after the measurement and confirmation of the through-stop measuring tool is adopted to ensure that the installation clearance of the honeycomb plate is a preset distance value, the honeycomb plate 2 is fully contacted with the adhesive film 5 on the main body part 1 and then is pressed. In this embodiment, the honeycomb panel installation GAP GAP1 is 1.5mm or less.
S4: confirming the positioning area on the honeycomb panel 2;
the positioning area is located on the upper end face of the honeycomb plate, and is a strip area which is uniformly equidistant from the edge of the honeycomb plate 2 by taking the edge of the honeycomb plate 2 as a starting point along the shape of the edge of the honeycomb plate 2.
S5: filling the uniformly stirred edge sealing adhesive 4 into an adhesive gun, and uniformly beating in a honeycomb plate mounting gap and a positioning area;
cleaning the edge sealing adhesive 4 outside the honeycomb panel installation gap and the positioning area; and the high temperature adhesive tape around the honeycomb panel 2 is peeled off
As shown in fig. 6, the area indicated by the broken line is an area covered by the edge sealing adhesive 4, and the shape of the area covered by the edge sealing adhesive 4 corresponds to the shape of the edge of the honeycomb panel 2. The width of the area covered by the edge sealing adhesive 4 comprises: the sum of the width of the positioning area on the honeycomb panel 2 and the honeycomb panel mounting gap. As shown in fig. 7, the width of the area covered by the edge sealing adhesive 4 on the honeycomb panel 2 is W2, the width of the positioning area is W1, and w2=w1+gap 1.
In the application, the edge sealing adhesive 4 is driven into the honeycomb plate mounting gap to ensure the transverse position of the honeycomb plate 2 to be positioned, and the change of the blade structure caused by the displacement of the honeycomb plate 2 in the process of mounting the cover plate 3 and in the process of heat curing is prevented. Through setting up banding adhesive 4 in the location area on honeycomb panel 2 to and banding adhesive 4 in the honeycomb panel installation clearance, ensure that the bonding structure between main part 1, apron 3 and the honeycomb panel 2 is more firm after the thermocuring process, improved blade bulk strength.
S6: the cover plate 3 is arranged in the cover plate cavity 1-2, and a uniform cover plate cavity installation gap is arranged between the edge of the cover plate 3 and the inner wall of the cover plate cavity 1-2;
after the measurement of the stopping measuring tool confirms that the installation gap of the cover plate 3 is a preset distance value, the adhesive film on the bonding side of the cover plate 3 is fully contacted with the step and the honeycomb plate 2, and the adhesive film 5 on the cover plate 3 is tightly pressed. In this embodiment, the cover cavity installation GAP GAP2 has a value of 0.5+ -0.15 mm.
S7: sequentially covering a separation film 6 and an airfelt 7 on the cover plate 3 and being positioned above the bonding area of the cover plate 3;
the area of the airfelt 7 is enough to cover each sharp point on the main body part 1, and the airfelt 7 is used to cover the bonding area of the cover plate, and at the same time, the airfelt 7 is ensured to wrap each sharp point on the main body part 1;
each sharp point is secondarily wrapped with an airfelt 7 provided exclusively for each sharp point on the main body part 1.
S8: placing the barrier film 6, airfelt 7 and pre-glued together blade parts together in a vacuum bag 8;
the vacuum valves 10 are uniformly arranged in the length direction and the width direction of the cover plate 3;
at least 2 vacuum valves 10 are arranged at 1/3 and 2/3 positions along the length direction of the cover plate 3;
the isolating film 6 is used for preventing impurities in air from entering the vacuum pipeline, and the airfelt 7 can prevent the bag body of the vacuum bag 8 from being excessively attached to form a local air chamber in the vacuumizing process, so that part of air cannot be pumped away. In the application, the isolating film 6 and the airfelt 7 are covered on the cover plate 3 in sequence and are positioned above the bonding area of the cover plate 3, so that the air around the bonding area of the cover plate 3 can be fully pumped out, and the vacuum effect is better. Meanwhile, the vacuum valves 10 are uniformly distributed above the cover plate 3, and the vacuum valves 10 extract air near the bonding area of the cover plate 3 through the isolating film 6 and the airfelt 7, so that the vacuum effect of the heat curing reaction occurrence area is better. Meanwhile, compared with the mode of arranging the vacuum valve 10 in the area outside the blade, the vacuum valve 10 is arranged at the position, so that the probability of generating an independent air chamber due to double-layer superposition of the vacuum bag 8 in the extraction process can be reduced.
The adhesive film 5 and the edge sealing adhesive 4 used in the present application can be used in various types under the process-allowable conditions. Wherein the adhesive film needs to be cured by vacuum hot pressing to obtain the best performance. In this embodiment, an adhesive film 5 and an edge sealing adhesive 4 whose main components are epoxy resin are used.
S9: as shown in fig. 8, the vacuum bag 8 is placed in an autoclave 9, and a vacuum valve 10 is connected to a vacuum pump line (not shown), and a preliminary vacuum process is performed.
Wherein, the pre-vacuum procedure comprises the following operations:
b1: gradually increasing the air extraction amount with a preset frequency;
b2: during the air extraction process, the tightness of the vacuum bag 8 is confirmed;
b3: in the air extraction process, at the structural switching position of the blade root and the blade top on the main body piece 1, for example: the sharp part 1-3 at the blade root and the sharp part 1-4 at the blade top have steeper turning structures. In particular, as shown in the embodiment of fig. 9, the turning structure on the main body 1 is a right-angle structure, and if the vacuum bag 8 is not completely attached to the turning structure, the vacuum bag 8 will be torn during the process of being pulled out and forcibly attached to the main body 1. Therefore, in the vacuum process, the vacuum bag 8 needs to be adjusted so that the vacuum bag 8 is attached to the blade in shape, and when the vacuum bag is actually implemented, no gap can be left between the vacuum bag 8 and the main body 1, as shown in fig. 10, so that the vacuum bag 8 can be completely attached to the side wall of the main body 1 in the vacuum pumping process, and cannot be torn.
S10: continuously vacuumizing, and stopping vacuumizing when the vacuum degree reaches a preset standard value (in the embodiment, when the vacuum degree reaches-0.07 MPa or more);
closing a tank door of the autoclave 9, pressurizing and heating, and curing the adhesive film 5 and the edge sealing adhesive 4; simultaneously, compress tightly apron 3 through the inside pressure that applys of autoclave 9 jar, ensure that the bonding between apron 3, honeycomb panel 2 and the main part 1 is more firm, simultaneously, compress tightly and fixed honeycomb panel 2, improved the structural strength between the part.
The adhesive film of the cover plate bonding area is initially solid, but is in a fluid state after a section of melting state process in the heat curing process, and when the vacuum bag is in a vacuum state, the adhesive film in the melting state is adsorbed into the cover plate cavity mounting gap by negative pressure caused by vacuum. The cover plate cavity mounting GAP GAP2 can be filled up by partial glue overflow generated in the heat curing process of the glue film in the cover plate area without special working procedures, so that the working procedures are simplified, and the structural strength between the cover plate 3 and the main body piece 1 can be enhanced.
S11: after the curing process is completed, the temperature is sufficiently reduced, and the vacuum bag 8 and the cured blade are taken out; and cleaning the blades, removing the high-temperature adhesive tape on the periphery of the cover plate 3, and using a through-stop measuring tool to confirm that the height difference between the cover plate and the main body part is within the range of-0.3-0.1 mm, so as to confirm that the quality requirements are met, and finishing the assembly process of the outlet guide vane of the hollow fan.
The curing condition of the epoxy resin adhesive film used in the implementation is 177 ℃ for curing for 1 hour, and the curing method of the edge sealing adhesive with the main component of epoxy resin comprises the following steps: curing at normal temperature for 3-5 days, or heat accelerated curing (1 hour at 177 ℃ is sufficient to complete curing), both glues can be used together for the assembly of the air gap fan outlet guide vanes in the present application.
After the technical scheme of the application is used, firstly, the adhesive film of the honeycomb plate and the cover plate is manually pre-adhered, the honeycomb plate is pre-adhered to the main body part, then the adhesive is driven into the main body part by using the adhesive gun to seal the edges of the honeycomb plate, then the cover plate is pre-adhered to the main body part, and finally, the adhesive film and the adhesive are solidified by using the vacuum autoclave. The honeycomb plates are positioned in the horizontal direction and the vertical direction through the edge sealing adhesive and the cover plate, so that the honeycomb pressed in the honeycomb cavity by the cover plate is prevented from being displaced in the bonding process and the heat curing process, and the yield of workpiece production is improved. The application uses the bonding process method to assemble each part of the blade, the main components used in the bonding are the epoxy resin adhesive film and the edge sealing agent, the required curing temperature is less than 200 ℃, the application is very suitable for the assembly process requirement of the blade in the application, and the application can obtain a stable structure and good strength while meeting the light weight requirement.

Claims (5)

1. The bonding and assembling method of the hollow fan outlet guide vane is characterized by comprising the following steps of:
s1: preparing the main body piece, the honeycomb plate, the cover plate and the adhesive film before assembling;
the main body piece is provided with a honeycomb cavity and a cover plate cavity, and the honeycomb cavity and the cover plate cavity form a step cavity;
determining an adhesion area of the honeycomb panel and the cover plate;
preparing a vacuum bag, a barrier film and an airfelt;
s2: the prepared adhesive films are respectively adhered to the cover plate and the bonding area of the honeycomb plate;
s3: placing the honeycomb plate in the center of a honeycomb cavity of a main body piece, wherein the edge of the honeycomb plate and the inner wall of the honeycomb cavity keep a uniform honeycomb plate installation gap;
after confirming that the honeycomb plate installation gap is a preset distance value, compacting the adhesive film on the honeycomb plate;
s4: confirming a location area on the honeycomb panel;
the positioning area is positioned on the upper end face of the honeycomb plate, and is a strip area which is uniformly equidistant with the edge of the honeycomb plate by taking the edge of the honeycomb plate as a starting point along the shape of the edge of the honeycomb plate;
s5: uniformly beating the uniformly stirred edge sealing adhesive in the honeycomb plate mounting gap and the positioning area;
cleaning the honeycomb plate mounting gap and the edge sealing adhesive outside the positioning area;
s6: the cover plate is installed in a cover plate cavity, and a uniform cover plate cavity installation gap is formed between the edge of the cover plate and the inner wall of the cover plate cavity;
after confirming that the cover plate installation gap is a preset distance value, compacting the adhesive film on the cover plate;
s7: sequentially covering the isolating film and the airfelt on the cover plate and being positioned above the bonding area on the cover plate;
s8: placing the barrier film, the airfelt and the pre-glued together blade members together into the vacuum bag;
uniformly arranging vacuum valves in the length direction and the width direction of the cover plate; at least 2 vacuum valves are arranged;
s9: the vacuum bag is prevented from being put into an autoclave, and the vacuum valve is connected with a vacuum pump pipeline to perform a pre-vacuum procedure;
s10: continuously vacuumizing, and stopping vacuumizing when the vacuum degree reaches a preset standard value;
closing a tank door of the autoclave, pressurizing and heating, and curing the adhesive film and the edge sealing adhesive;
s11: after the curing process is completed, fully cooling, and taking out the vacuum bag and the cured blade; cleaning blades to complete the assembly process of the outlet guide vane of the hollow fan;
in step S7, the area of the airfelt is enough to cover each sharp point on the main body member, and the airfelt is used to cover the bonding area of the cover plate, at the same time, the airfelt is ensured to wrap each sharp point on the main body member;
the honeycomb plate is positioned in the height direction through the cover plate, and is positioned in the horizontal direction through the edge sealing adhesive, so that the honeycomb plate is ensured not to displace in the heating and curing process, and a positioning structure is not required to be arranged on the honeycomb plate independently;
when the honeycomb panel is assembled, a uniform honeycomb panel installation GAP GAP1 is reserved between the edge of the honeycomb panel and the inner wall of the honeycomb cavity, and a uniform cover panel cavity installation GAP GAP2 is reserved between the edge of the cover panel and the inner wall of the cover panel cavity;
the honeycomb panel installation GAP GAP1 is less than or equal to 1.5mm;
the value of the cover plate cavity installation GAP GAP2 is 0.5+/-0.15 mm;
the adhesive film of the cover plate bonding area is solid initially, but is in a fluid state after a section of melting state process in the heat curing process, and when the vacuum bag is in a vacuum state, the adhesive film in the melting state is adsorbed into the cover plate cavity mounting gap by negative pressure caused by vacuum; and the cover plate cavity installation GAP GAP2 is filled up by partial glue overflow generated in the heat curing process through the glue film in the cover plate area, so that the structural strength between the cover plate and the main body piece is enhanced.
2. The bonding assembly method of the outlet guide vane of the hollow fan according to claim 1, wherein: in step S1, the preparation work for the main body member, the honeycomb panel, the cover plate and the adhesive film includes:
a1: cleaning the bonding area by using a cleaning agent;
a2: the high-temperature adhesive tape is arranged on the main body piece at the position of the outer ring of the bonding area of the honeycomb plate and is used for protecting overflow glue along the edge of the honeycomb plate;
a3: a circle of high-temperature adhesive tape is arranged on the main body piece at the position of the outer ring of the bonding area on the cover plate along the edge of the cover plate to be used as overflow protection;
a4: and cutting the adhesive film to obtain the adhesive film with the same shape as the bonding area of the honeycomb plate and the cover plate.
3. The bonding assembly method of the outlet guide vane of the hollow fan according to claim 1, wherein: in step S7, the method further includes the steps of:
each sharp point is secondarily wrapped with airfelt specifically provided for each sharp point on the body member.
4. The bonding assembly method of the outlet guide vane of the hollow fan according to claim 1, wherein: the number of the vacuum valves is 2, and the vacuum valves are respectively arranged at 1/3 and 2/3 positions in the length direction of the cover plate.
5. The bonding assembly method of the outlet guide vane of the hollow fan according to claim 1, wherein: the pre-vacuum procedure comprises the following operations:
b1: gradually increasing the air extraction amount with a preset frequency;
b2: in the air extraction process, confirming the tightness of the vacuum bag;
b3: in the air extraction process, the vacuum bag is adjusted at the structure switching position of the blade root and the blade top position on the main body part, so that the vacuum bag is attached to the shape of the blade, and the gap between the vacuum bag and the main body part is 0-0.5mm.
CN202310564535.0A 2023-05-19 2023-05-19 Bonding assembly method for hollow fan outlet guide vane Active CN116330680B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208529777U (en) * 2018-05-03 2019-02-22 上海晋飞碳纤科技股份有限公司 A kind of core material bonded structure suitable for complex profile
CN112743880A (en) * 2020-12-11 2021-05-04 哈尔滨飞机工业集团有限责任公司 Repairing method for large-area damage of honeycomb sandwich structural member
CN112743874A (en) * 2020-12-11 2021-05-04 哈尔滨飞机工业集团有限责任公司 Laying method of composite material honeycomb sandwich piece adhesive film
CN114654864A (en) * 2022-02-17 2022-06-24 成都飞机工业（集团）有限责任公司 Preparation method of acoustic lining plate with honeycomb sandwich structure
CN115042452A (en) * 2022-04-06 2022-09-13 湖南值信科技有限公司 Forming method of honeycomb sandwich resin-based composite material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208529777U (en) * 2018-05-03 2019-02-22 上海晋飞碳纤科技股份有限公司 A kind of core material bonded structure suitable for complex profile
CN112743880A (en) * 2020-12-11 2021-05-04 哈尔滨飞机工业集团有限责任公司 Repairing method for large-area damage of honeycomb sandwich structural member
CN112743874A (en) * 2020-12-11 2021-05-04 哈尔滨飞机工业集团有限责任公司 Laying method of composite material honeycomb sandwich piece adhesive film
CN114654864A (en) * 2022-02-17 2022-06-24 成都飞机工业（集团）有限责任公司 Preparation method of acoustic lining plate with honeycomb sandwich structure
CN115042452A (en) * 2022-04-06 2022-09-13 湖南值信科技有限公司 Forming method of honeycomb sandwich resin-based composite material

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