CN113459526B - Glue joint forming method for composite material fan blade and metal wrapping edge - Google Patents
Glue joint forming method for composite material fan blade and metal wrapping edge Download PDFInfo
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- CN113459526B CN113459526B CN202110740970.5A CN202110740970A CN113459526B CN 113459526 B CN113459526 B CN 113459526B CN 202110740970 A CN202110740970 A CN 202110740970A CN 113459526 B CN113459526 B CN 113459526B
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- 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
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- 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
- B29C65/7855—Provisory fixing
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- 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
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/721—Fibre-reinforced materials
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- 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
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
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- 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
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
- B29C66/7422—Aluminium or alloys of aluminium
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- 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
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
- B29C66/7428—Transition metals or their alloys
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- 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
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- Engineering & Computer Science (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a glue joint forming method of a composite material fan blade and a metal wrapping edge, and mainly relates to a glue joint forming method of a composite material fan blade and a metal wrapping edge. According to the method, the composite material fan blade body and the metal wrapping edge are respectively subjected to positioning control, then the pre-assembly of the composite material fan blade body and the metal wrapping edge is obtained after self-adaptive torsion positioning, and then the temperature is raised and cured to obtain the fan blade assembly, so that the gluing control of a complex torsion blade structure and a deep V-shaped groove thin-wall torsion metal structure is realized, and the foreign object impact resistance of the composite material fan blade is obviously improved.
Description
Technical Field
The invention belongs to the technical field of resin-based composite material molding, and particularly relates to a glue joint molding method for a composite material fan blade and a metal wrapping edge.
Background
The carbon fiber reinforced resin matrix composite material has the unique advantages of light weight, high specific strength, high specific modulus, good fatigue fracture resistance, corrosion resistance, convenience for large-area integral forming and the like, is widely applied to aviation aircrafts and engine structures, becomes a key material of aviation equipment, and the using amount of the carbon fiber reinforced resin matrix composite material also becomes one of the advanced marks of the aviation equipment. The composite material fan blade is a composite material part with high precision requirement widely applied to an aeroengine, directly influences the aerodynamic performance and noise index of the engine, simultaneously needs to bear huge centrifugal force generated by high-speed rotation, aerodynamic force generated by high-speed airflow, fatigue load generated by blade vibration, impact of foreign objects such as sand stones, birds and the like, and has extremely high requirements on material performance, forming quality and forming precision.
In order to ensure the safety of an engine, a foreign object impact resistance test of a fan blade is a necessary condition for the engine to pass examination and verification, the composite material fan blade body is difficult to bear huge energy (the impact speed can reach more than 300 kilometers per hour) generated by high-speed impact of birds or foreign objects during aircraft takeoff, and a conventional method is to increase a metal wrapping edge on the front edge of the composite material fan blade body so as to improve the impact resistance of the composite material fan blade.
However, the composite material fan blade body is a large-torsion variable-section complex curved surface structure, the front edge of the blade is the area with the largest torsion curved surface deformation, the metal edge cover matched with the blade is a deep V-groove-shaped torsion structural member, the rigidity of the blade is strong, and the two are difficult to glue and match. Firstly, in order to ensure the adhesive interface strength of metal and composite materials, the thickness of a single-side adhesive layer of a metal edge and a composite material fan blade body must be controlled within the range of 0.2 mm-0.4 mm, if the thickness of the single-side adhesive layer of the metal edge and the composite material fan blade body is too poor, the interface strength is reduced, and the design strength requirement of an engine cannot be met, but the adhesive layer thickness control of a special-shaped structure is very difficult; in addition, in order to ensure the overall aerodynamic shape of the blade after bonding, the relative position relationship between the composite material fan blade body and the metal wrapping edge has a high precision requirement, usually +/-0.2 mm, if the relative position relationship between the composite material fan blade body and the metal wrapping edge deviates, the aerodynamic requirement of an engine cannot be met, and the composite material fan blade body and the metal wrapping edge are free-state curved surfaces and have no positioning reference, so that the precision control of the relative position is very difficult.
Therefore, in order to enable the composite material fan blade to be applied to an engine, a method for ensuring the relative position precision and the bonding strength when the composite material fan blade body and the metal edge cover are bonded is needed.
Disclosure of Invention
(1) Technical problem to be solved
The embodiment of the invention provides a high-precision positioning glue-bonding forming method aiming at two complex special-shaped structures of a composite material fan blade and a metal wrapping edge.
(2) Technical scheme
The embodiment of the invention provides a glue joint forming method of a composite material fan blade and a metal wrapping edge, wherein a composite material fan blade assembly is formed by gluing a composite material fan blade body and the metal wrapping edge, and the glue joint forming method is characterized by at least comprising the following steps of S110-S170:
step S110, gluing limit balls on the tip part and the tail inner cavity of the metal edge cover for later use;
step S120, detachably fixing the metal wrapping edge on a special wrapping edge positioning device with a V-shaped groove facing upwards, wherein the wrapping edge positioning device has the function of driving the metal wrapping edge to rotate by 0-360 degrees on an XY plane after being matched with a motor, and regulating and controlling the angle of the wrapping edge positioning device to enable the metal wrapping edge to be matched with the insertion angle of the composite material fan blade body;
step S130, wrapping a gauze on the front edge of the composite material fan blade body, then placing a glue film on the gauze, and vacuumizing and shaping for later use;
step S140, detachably fixing the composite material fan blade body with the front edge of the composite material fan blade body facing downwards on a special blade positioning device, wherein the blade positioning device has a function of driving the composite material fan blade body to realize Z-direction up-down lifting after being matched with a motor;
s150, adjusting the blade positioning device to move up and down in the Z direction, so that the composite material fan blade body slowly moves downwards to be close to the metal wrapping edge, and adjusting and controlling the wrapping edge positioning device to start to slowly rotate when the front edge is close to the V-shaped groove, so that the V-shaped groove of the metal wrapping edge is always matched with the front edge of the composite material fan blade body;
step S160, when the front edge of the composite material fan blade body is about to contact with a limiting ball placed in the metal covered edge, measuring and monitoring a blade positioning device through a measuring device, and when the composite material fan blade body reaches a theoretical position in the Z direction, stopping lifting and descending movement of the blade positioning device and rotation of the covered edge positioning device to obtain a composite material fan blade assembly;
and S170, taking out the composite material fan blade assembly from the edge covering positioning device and the blade positioning device, and curing according to the curing process parameters of the selected adhesive film to obtain the final composite material fan blade.
Further, in step S110, the diameter of the limiting ball is consistent with the length of the hole of the composite material fan blade body and the inner edge of the metal edge.
Further, in step S110, the material of the limiting ball is the same as the material of the composite fan blade body.
Further, in step S120, the hemming positioning device includes a rotary base, a positioning groove, a hemming positioning clip, a tip positioning block, and a tenon positioning block, when the metal hemming is installed, the whole hemming positioning clip is pulled open, the metal hemming is installed in the positioning groove, the tip positioning block and the tenon positioning block are installed on the front side and the rear side of the metal hemming, the hemming positioning clip is screwed, the metal hemming is firmly fixed on the hemming positioning device, and the angle of the rotary base is adjusted to match the insertion angle of the composite material fan blade body.
Further, in step S130, the screen is made of a porous fabric woven from glass fibers, carbon fibers, and kevlar fibers, and has a single-layer thickness of 0.2mm to 0.25 mm.
Further, in step S140, the blade positioning device includes a positioning bracket, a blade tip positioning clamping piece, a tenon side positioning knob, and a positioning reference, and when the composite material fan blade body is mounted, the tenon positioning clamping piece and the tenon side positioning knob are opened, the tenon portion of the composite material fan blade body is placed on the positioning bracket, the tenon positioning clamping piece and the tenon side positioning knob are tightened, the blade tip positioning clamping piece is mounted on the positioning device, and the composite material fan blade body is firmly fixed on the positioning device.
Further, the metal wrapping edges are made of titanium alloy, nickel alloy and aluminum alloy.
Further, the composite material fan blade body is formed by adopting a prepreg/autoclave process or a weaving/RTM process by adopting raw materials of carbon fiber, glass fiber and Kevlar fiber.
(3) Advantageous effects
1. According to the invention, after the composite material fan blade body with the complex torsional curved surface variable cross section and the metal wrapping edge with the torsional curved surface deep V-shaped groove shape are respectively provided with the corresponding positioning devices, the conversion from the complex positioning reference of the torsional curved surface variable cross section structure to the simple positioning reference is realized through the respective positioning devices, and the complexity of the composite material fan blade body and the metal wrapping edge positioning reference is reduced;
2. the invention realizes the mutual movement and accurate positioning of the composite material fan blade body and the metal wrapping through the rotation and lifting functions of the respective positioning devices, and meets the high-precision requirement of design;
3. the invention can realize the precision control of the glue layer thickness of the composite material fan blade body with the complex torsional curved surface variable cross section and the torsional curved surface deep V-shaped groove-shaped metal wrapping edge, ensure the adhesive strength and meet the design requirements.
In conclusion, the invention can realize the high-precision positioning of the complex free-twist curved-surface fan blade structure and the deep V-shaped edge-wrapping structure which are made of two different materials, ensure the bonding strength and meet the harsh requirements of an engine on the pneumatic appearance and the impact strength of the composite material fan blade.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a composite fan blade formed by combining a composite fan blade body and a metal wrapping edge;
FIG. 2 is a schematic view of the mutual spacing of the metal edge and the front edge of the composite material fan blade body in the present invention;
FIG. 3 is a schematic diagram of the metal-clad positioning reference conversion in the present invention;
FIG. 4 is a schematic view of a method for controlling the thickness of the front edge of the composite material fan blade body and the metal edge-covering rubber layer according to the present invention;
FIG. 5 is a schematic illustration of a composite fan blade body position datum transition in accordance with the present invention;
FIG. 6 is a schematic view of the mating movement of the composite fan blade body and the metal wrap of the present invention.
In the figure:
1-a composite fan blade body; 2-metal edge covering; 3-leading edge; 4-V type groove; 5-a composite fan blade assembly; 10-a positioning device for edge covering; 11-tip positioning block; 12-a tenon positioning block; 13-positioning grooves; 14-positioning clamping pieces for edge covering; 15-rotating the base; 20-a compound blade positioning device; 21-blade tip positioning clips; 22-tongue positioning clips; 23-tenon side positioning knob; 24-positioning reference; 25-positioning the bracket; 30-a measuring device; 40-limiting ball.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the described embodiments.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 6, the invention provides a method for molding a composite material fan blade by gluing with a metal wrapping edge, wherein a composite material fan blade assembly 5 is formed by gluing a composite material fan blade body 1 and a metal wrapping edge 2, and the molding method only comprises the following steps of S110 to S170:
step S110, adhering the limiting balls 40 to the tip part and the tail part inner cavity of the metal wrapping edge 2 by using glue for later use; the diameter of the limiting ball 40 is consistent with the length of the hole of the inner edges of the composite fan blade body 1 and the metal wrapping edge 2; the material of the limiting ball 40 is the same as that of the composite material fan blade body 1.
And step S120, detachably fixing the metal wrapping edge 2 on a special wrapping edge positioning device 10 with the V-shaped groove 4 facing upwards, driving the metal wrapping edge 2 to rotate by 0-360 degrees on an XY plane after the wrapping edge positioning device 10 is matched with a motor, and regulating and controlling the angle of the wrapping edge positioning device 10 to enable the angle to be matched with the insertion angle of the composite material fan blade body 1.
The edge covering positioning device 10 in the step comprises a rotary base 15, a positioning groove 13, edge covering positioning clamping pieces 14, a tip positioning block 11 and a tenon positioning block 12, when the metal edge covering 2 is installed, all the edge covering positioning clamping pieces 14 are pulled open, the metal edge covering 2 is installed in the positioning groove 13, the tip positioning block 11 and the tenon positioning block 12 are respectively installed on the front side and the rear side of the metal edge covering 2, the edge covering positioning clamping pieces 14 are screwed, the metal edge covering 2 is firmly fixed on the edge covering positioning device 10, and the angle of the rotary base (15) is adjusted to be matched with the insertion angle of the composite fan blade body 1
Step S130, wrapping a gauze 50 on the front edge 3 of the composite fan blade body 1, then placing a glue film 60 on the gauze 50, and vacuumizing and shaping for later use; the gauze 50 is made of porous fabric woven by glass fiber, carbon fiber and Kevlar fiber, and the thickness of a single layer is 0.2-0.25 mm.
Step S140, detachably fixing the composite material fan blade body 1 with the front edge 3 facing downwards on a special blade positioning device 20, wherein the blade positioning device 20 is matched with a motor and then has the function of driving the composite material fan blade body 1 to realize the Z-direction up-down lifting.
The blade positioning device 20 in this step includes a positioning support 25, a blade tip positioning clamping piece 21, a tenon portion positioning clamping piece 22, a tenon portion side positioning knob 23 and a positioning reference 24, when the composite material fan blade body 1 is installed, the tenon portion positioning clamping piece 22 and the tenon portion side positioning knob 23 are opened, the tenon portion of the composite material fan blade body 1 is placed on the positioning support 25, the tenon portion positioning clamping piece 22 and the tenon portion side positioning knob 23 are screwed, the blade tip positioning clamping piece 21 is installed on the positioning device 20, and the composite material fan blade body 1 is firmly fixed on the positioning device 20.
And S150, adjusting the blade positioning device 20 to move up and down in the Z direction, so that the composite material fan blade body 1 slowly moves downwards to be close to the metal wrapping edge 2, and when the front edge 3 is close to the V-shaped groove 4, adjusting and controlling the wrapping edge positioning device 10 to start to slowly rotate, so that the V-shaped groove 4 of the metal wrapping edge 2 is always matched with the front edge 3 of the composite material fan blade body 1.
Step S160, when the front edge 3 of the composite material fan blade body 1 is about to contact with the limiting ball 40 placed in the metal edge covering 2, the blade positioning device 20 is measured and monitored through the measuring device 30, and when the composite material fan blade body 1 reaches the theoretical position in the Z direction, the lifting movement of the blade positioning device 20 and the rotation of the edge covering positioning device 10 are both stopped, so that the composite material fan blade assembly 5 is obtained.
And S170, taking the composite material fan blade assembly 5 out of the edge covering positioning device 10 and the blade positioning device 20, and curing according to the curing process parameters of the selected adhesive film to obtain the final composite material fan blade.
The working principle of the invention is as follows:
1. the invention designs and selects the tenon part and the blade tip profile of the composite material fan blade body as the positioning reference of the composite material fan blade body, adopts the movable detachable positioning clamping piece to fix the composite material fan blade body on the pre-designed blade positioning device, and then converts the positioning reference of the blade positioning device into the moving positioning reference of the composite material fan blade body.
2. The invention designs and selects the front and rear inclined planes of a V-shaped groove of the metal wrapping edge as the positioning reference of the metal wrapping edge, fixes the metal wrapping edge on a pre-designed positioning device by adopting an elastic positioning clamping piece, and then converts the rotating plane of the wrapping edge positioning device into the rotating positioning reference of the metal wrapping edge;
3. the invention adopts the mode of pre-attaching the gauze carrier on the glue connection area of the composite material fan blade body to ensure that the thickness of the glue layer of the composite material fan blade body and the metal edge is within the preset range.
4. The invention adopts a mode of pre-attaching the limiting balls on the front inner edge and the rear inner edge inside the metal edge-covered deep V-shaped groove to fix the relative positions of the metal edge-covered and the composite material fan blade body, thereby not only limiting the mutual position relation of the metal edge-covered and the composite material fan blade body in the matching process, but also avoiding the mutual position movement of the metal edge-covered and the composite material fan blade body caused by the vacuum action in the heating and curing process of the glue film.
5. The blade positioning device and the wrapping positioning device respectively adopt up-down movement and rotation movement to realize high-precision follow-up matching of the composite material fan blade body and the metal wrapping, eliminate the interference phenomenon of the composite material fan blade body with the torsional curved surface structure and the metal wrapping in the matching process, and solve the problems of local stress concentration and deformation caused by forced matching of the composite material fan blade body and the metal wrapping.
The following description will use example 1 as a specific example, the material of the woven composite fan blade body 1 is CCF800/PR520N, the woven/RTM process is adopted for forming, and the material of the metal wrapping 2 is TC4 titanium alloy, and the numerical control processing is adopted for forming. The method comprises the following steps of performing adhesive molding on a fan blade body 1 made of a woven composite material and a titanium alloy metal wrapping edge 2:
1) a binding positioning device 10 for accommodating a metal binding 2 is processed, the binding positioning device 10 is composed of a rotating base 15, a positioning groove 13, a binding positioning clamping piece 14, a tip positioning block 11 and a tenon positioning block 12, and the binding positioning device 10 is matched with a motor to realize a 360-degree rotating function.
2) A blade positioning device 20 for accommodating a composite material fan blade body 1 is processed, the blade positioning device 20 is composed of a positioning support 25, a blade tip positioning clamping piece 21, a tenon portion positioning clamping piece 22, a tenon portion side positioning knob 23 and a positioning reference 24, and the blade positioning device 20 can achieve the function of lifting up and down by being matched with a motor.
3) And processing a composite material limiting ball 40, wherein the diameter of the limiting ball 40 is consistent with the length of the hole of the inner edges of the composite material fan blade body 1 and the metal edge cover 2.
4) The limiting ball 40 is adhered to the inner cavities at the tip part and the tail part of the metal wrapping edge 2 by glue for standby.
5) The elastic type edge covering positioning clamping piece 14 on the edge covering positioning device 10 is pulled open, the metal edge covering 2 is placed in the positioning groove 13, the tip part positioning block 11 and the tenon part positioning block 12 are respectively installed on the front side and the rear side of the metal edge covering 2, the edge covering positioning clamping piece 14 is screwed down, the metal edge covering 1 is firmly fixed on the positioning device 10, and the angle of the rotary base 15 is adjusted to be matched with the insertion angle of the composite material fan blade body 1.
6) Wrapping a glass cloth gauze 50 on the front edge 3 of the composite fan blade body 1, then placing a glue film 60 on the gauze 50, and vacuumizing and shaping for later use.
7) The tenon part positioning clamping piece 22 and the tenon part side positioning knob 23 on the blade positioning device 20 are opened, the tenon part of the composite material fan blade body 1 is placed on the positioning support 25, the tenon part positioning clamping piece 22 and the tenon part side positioning knob 23 are screwed, the blade tip positioning clamping piece 21 is installed on the blade positioning device 20, and the composite material fan blade body 1 is firmly fixed on the blade positioning device 20.
8) And (3) opening a lifting controller of the blade positioning device 20, slowly moving the composite material fan blade body 1 downwards to be close to the metal wrapping edge 2, opening a rotary controller of the wrapping edge positioning device 10 when the front edge 3 of the composite material fan blade body 1 is close to the metal wrapping edge 2, and slowly rotating a rotary base 15 of the wrapping edge positioning device 10 to enable the V-shaped groove 4 of the metal wrapping edge 2 to be matched with the front edge 3 of the composite material fan blade body 1 all the time.
9) When the front edge 3 of the composite material fan blade body 1 is about to contact with the limiting ball 40 placed in the metal wrapping edge 2, the laser tracker 30 is adopted to measure and monitor the positioning benchmark 24 of the blade positioning device 20, and when the positioning benchmark 24 reaches the theoretical position, the lifting controller of the blade positioning device 20 and the rotating controller of the wrapping edge positioning device 10 are closed.
10) And sequentially pulling open the edge covering positioning clamping pieces 14 on the metal edge covering 1, taking down the tip part positioning blocks 11 and the tenon part positioning blocks 12, opening the tenon part positioning clamping pieces 22 and the tenon part side positioning knobs 23 on the composite material fan blade body 2, and taking down the blade tip positioning clamping pieces 21.
11) And taking the composite material fan blade assembly 5 out of the edge covering positioning device 10 and the blade positioning device 20, and curing according to the curing process parameters of the selected adhesive film to obtain the final product composite material fan blade.
And (3) detecting the appearance quality and the internal quality of the molded composite material fan blade assembly 5, wherein the design requirements are met.
The above description is only an example of the present application and is not limited to the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. A glue joint forming method of a composite material fan blade and a metal wrapping edge is characterized in that a composite material fan blade assembly (5) is formed by gluing a composite material fan blade body (1) and a metal wrapping edge (2), and the forming method comprises the following steps:
step S110, adhering composite material limiting balls (40) to the tip part and the tail part inner cavity of the metal wrapping edge (2) by using glue for later use;
step S120, detachably fixing the metal wrapping (2) on a special wrapping positioning device (10) with a V-shaped groove (4) facing upwards, wherein the wrapping positioning device (10) has a function of driving the metal wrapping (2) to rotate by 0-360 degrees on an XY plane after being matched with a motor, and regulating and controlling the angle of the wrapping positioning device (10) to be matched with the insertion angle of the composite material fan blade body (1);
step S130, wrapping a gauze (50) on the front edge (3) of the composite fan blade body (1), then placing an adhesive film (60) on the gauze (50), and vacuumizing and shaping for later use;
step S140, detachably fixing the composite material fan blade body (1) on a special blade positioning device (20) with the front edge (3) facing downwards, wherein the blade positioning device (20) has a function of driving the composite material fan blade body (1) to realize Z-direction up-down lifting after being matched with a motor;
s150, adjusting the blade positioning device (20) to move up and down in the Z direction, so that the composite material fan blade body (1) slowly moves downwards to be close to the metal wrapping edge (2), and when the front edge (3) is close to the V-shaped groove (4), adjusting and controlling the wrapping edge positioning device (10) to start to slowly rotate, so that the V-shaped groove (4) of the metal wrapping edge (2) is always matched with the front edge (3) of the composite material fan blade body (1);
step S160, when the front edge (3) of the composite material fan blade body (1) is about to contact with a limiting ball (40) placed in the metal wrapping edge (2), measuring and monitoring a blade positioning device (20) through a measuring device (30), and when the composite material fan blade body (1) reaches a theoretical position in the Z direction, stopping lifting and moving of the blade positioning device (20) and rotation of the wrapping edge positioning device (10) to obtain a composite material fan blade assembly (5);
and S170, taking the composite material fan blade assembly (5) out of the edge covering positioning device (10) and the blade positioning device (20), and curing according to the curing process parameters of the selected adhesive film to obtain the final composite material fan blade.
2. The gluing and molding method of the composite material fan blade and the metal wrapping edge of claim 1, wherein in the step S110, the diameter of the limiting ball (40) is consistent with the length of the hole of the inner edges of the composite material fan blade body (1) and the metal wrapping edge (2).
3. The gluing and molding method of the composite material fan blade and the metal wrapping edge of claim 1, wherein in the step S110, the material of the limiting ball (40) is the same as that of the composite material fan blade body (1).
4. The method of claim 1 for adhesive bonding a composite fan blade to a metal surround, it is characterized in that in the step S120, the edge covering positioning device (10) comprises a rotary base (15), a positioning groove (13), an edge covering positioning clamping piece (14), a tip part positioning block (11) and a tenon part positioning block (12), when the metal edge covering (2) is installed, pulling open all the wrapping positioning clamping pieces (14), installing the metal wrapping (2) in the positioning groove (13), the tip part positioning block (11) and the tenon part positioning block (12) are respectively arranged at the front side and the rear side of the metal edge covering (2), the edge covering positioning clamping piece (14) is screwed down, the metal edge covering (2) is firmly fixed on the edge covering positioning device (10), and the angle of the rotating base (15) is adjusted to match the insertion angle of the composite material fan blade body (1).
5. The gluing and forming method of the composite material fan blade and the metal wrapping edge of claim 1, wherein in the step S130, the gauze (50) is made of porous fabric woven by glass fiber, carbon fiber and Kevlar fiber, and the single-layer thickness is 0.2-0.25 mm.
6. The glue-bonding molding method of the composite material fan blade and the metal wrapping edge as claimed in claim 1, wherein in step S140, the blade positioning device (20) comprises a positioning support (25), a blade tip positioning clamping piece (21), a tenon portion positioning clamping piece (22), a tenon portion side positioning knob (23) and a positioning datum (24), when the composite material fan blade body (1) is installed, the tenon portion positioning clamping piece (22) and the tenon portion side positioning knob (23) are opened, the tenon portion of the composite material fan blade body (1) is placed on the positioning support (25), the tenon portion positioning clamping piece (22) and the tenon portion side positioning knob (23) are tightened, the blade tip positioning clamping piece (21) is installed on the positioning device (20), and the composite material fan blade body (1) is firmly fixed on the positioning device (20).
7. The gluing and forming method of the composite material fan blade and the metal wrapping edge according to claim 1, wherein the metal wrapping edge (2) is processed by adopting metals of titanium alloy, nickel alloy and aluminum alloy.
8. The gluing forming method of the composite material fan blade and the metal wrapping edge of claim 1 is characterized in that the composite material fan blade body (1) is formed by a prepreg/autoclave process or a weaving/RTM process by adopting raw materials of carbon fiber, glass fiber and Kevlar fiber.
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| CN114683558B (en) * | 2022-04-06 | 2023-10-03 | 航天海鹰(镇江)特种材料有限公司 | Cementing method for metal edge-covering of composite material blade |
| CN115416392B (en) * | 2022-09-22 | 2024-07-26 | 中国航空制造技术研究院 | Method for controlling cementing deformation of composite sandwich structure |
| CN116373319B (en) * | 2023-06-02 | 2023-08-22 | 龙华相位新材料(绵阳)股份有限公司 | Edge protection device and edge protection method for optical film |
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