An apparatus for manufacturing a metal reinforcing edge of a fan blade leading edge of an aeroengine

Abstract

The application relates to a device for preparing a metal reinforcing edge of a fan blade front edge of an aero-engine, which comprises a bottom plate, left and right vertical columns arranged in a substantially symmetrical mode and arranged at two ends of the bottom plate, a concave die and a convex die arranged in a matched mode, the concave die and the convex die being arranged in a first space formed by the bottom plate, the left and right vertical columns in an up-down mode, the convex die being fixed on the bottom plate, the concave die being concavely provided with a partial cavity for containing a product to be processed, the shape of the convex die being matched with the shape of a cavity in the reinforcing edge, a second space for mounting the product to be processed being formed between the concave die and the convex die, and two shaping sliding blocks being arranged in a substantially symmetrical mode on two sides of the convex die, a third space for sliding of the shaping sliding blocks being arranged on the bottom plate. Compared with the prior art, the device has the advantages of ensuring precision, easy demolding and the like.

Description

Technical Field

[0001] This invention relates to a mold for manufacturing aero-engine components, and more particularly to an apparatus for preparing a metal reinforcing edge on the leading edge of an aero-engine fan blade. Background Technology

[0002] Currently, most aero-engines utilize large-size resin-based composite fan blades, whose weight reduction and efficiency improvement are crucial for enhancing the thrust-to-weight ratio of aero-engines. Compared to titanium alloy blades, composite fan blades offer advantages such as lighter weight, higher efficiency, lower noise, lower fuel consumption, stronger flutter resistance, and greater damage tolerance. They are key to structural innovation and technological breakthroughs in high-bypass turbofan engines, making related technology research of significant importance. The leading edge of the composite fan blade is the part operating in the harshest environment. To prevent delamination and debonding of the inlet edge during complex high-load, high-speed service, and to improve its corrosion resistance, impact resistance, and bird strike resistance, a metal-reinforced edge structure must be used to protect the leading edge of the composite blade.

[0003] The leading-edge metal reinforcing edge structure of composite fan blades is extremely complex, exhibiting an overall characteristic of a complex, thin-walled, deep, narrow V-shaped groove. This groove is deep, narrow, elongated, and highly tortuous, with a roughly V-shaped cross-section. It represents a deep fusion of ultra-thin-walled characteristics with large torsional curvature and deep, narrow, elongated V-shaped groove features. Compared to common complex thin-walled structures such as integral bladed disks and blades in aero-engines, it belongs to a more complex category of thin-walled, ultra-weakly rigid channel components. Current methods for machining the leading-edge metal reinforcing edge of composite fan blades typically employ multi-axis CNC machining, which is cumbersome, difficult to position, and struggles to guarantee machining accuracy. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of the prior art and provide a device for preparing a metal reinforcing edge of the leading edge of an aero-engine fan blade that ensures accuracy and is easy to demold.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An apparatus for preparing a metal reinforcing edge at the leading edge of an aero-engine fan blade, comprising:

[0007] Base plate;

[0008] The left and right columns, arranged in a basically symmetrical manner, are located at both ends of the base plate;

[0009] The matching die and punch are arranged vertically within a first space formed by the base plate, the left column and the right column. The punch is fixed to the base plate. The die has a recessed cavity to accommodate the product to be processed. The shape of the punch matches the shape of the cavity of the forming reinforcement edge. A second space for installing the product to be processed is formed between the die and the punch.

[0010] Two shaping sliders are arranged symmetrically on both sides of the punch, and a third space is provided on the base plate for the shaping sliders to slide.

[0011] Furthermore, the cavity of the die is provided with a clearance area, and a clamping member is provided on the die at the clearance area.

[0012] Furthermore, the left column is provided with a first side positioning component, and the right column is provided with a second side positioning component. Of the first side positioning component and the second side positioning component, one forms the product contact surface, and the other is a clamping component.

[0013] Furthermore, it also includes a clamping and limiting frame, wherein the die, punch and shaping slider form an integral structure, and the clamping and limiting frame is sleeved outside the integral structure and fixed to the base plate.

[0014] Furthermore, the side of the punch is provided with a limiting surface that allows the shaping slider to slide while preventing overpressure.

[0015] Furthermore, a guide block is provided on the base plate, and a corresponding guide groove is provided on the shaping slider.

[0016] Furthermore, the shaping slider is provided with an ejection mechanism to assist in the exit operation of the shaping slider.

[0017] Furthermore, the shaping slider is provided with a first handle to assist in the exiting operation of the shaping slider.

[0018] Furthermore, the die is provided with a second handle to assist in the disengagement of the die.

[0019] Furthermore, the materials used in the preparation apparatus include hot work die steel or nickel-based high-temperature alloys.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention is provided with a matching concave mold and a convex mold, as well as a left column and a right column arranged in a basically symmetrical manner, which can reliably position and limit the product, ensure that the product reaches a certain accuracy, and the final forming accuracy of the part can be controlled within ±0.4mm.

[0022] 2. The present invention has a recessed cavity in the concave part of the die to accommodate the product to be processed. The shape of the punch matches the shape of the inner cavity of the forming reinforcement edge. After the product is formed, it can be easily demolded in the mold with a large lead "spiral" shape according to the product shape. Demolding is convenient and the product forming rate is high.

[0023] 3. The shaping slider of the present invention adopts a sliding method and is equipped with a top-tightening limit frame to tighten the die and the shaping slider while preventing the shaping slider from falling off, thereby improving the reliability of the device.

[0024] 4. The material used in the device of the present invention can be hot work die steel or nickel-based high temperature alloy, so that the mold can be used in both normal temperature and high temperature environments, covering the entire production process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is an exploded view of the present invention;

[0027] Figure 3 This is a schematic diagram of the punch installation of the present invention;

[0028] Figure 4 This is a schematic diagram showing the mating installation of the punch and die of the present invention;

[0029] Figure 5 This is a schematic diagram of the left column of the present invention;

[0030] Figure 6 This is a schematic diagram of the right column of the present invention;

[0031] Figure 7 This is a schematic diagram of the installation of the clamping and limiting frame of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] Example 1

[0038] refer to Figure 1 and Figure 2 As shown, this embodiment provides a device for preparing a metal reinforcing edge at the leading edge of an aero-engine fan blade. It includes a base plate 1, symmetrically arranged left and right columns 6 and 4, a matched die 5 and punch 3, and two shaping sliders 2 and 8. The left and right columns 6 and 4 are respectively located at both ends of the base plate 1. The die 5 and punch 3 are arranged vertically within a first space formed by the base plate 1, the left column 6, and the right column 4. The punch 3 is fixed to the base plate 1. The die 5 has a cavity for accommodating the product to be processed. The shape of the punch 3 matches the shape of the inner cavity of the reinforcing edge. A second space for installing the product to be processed is formed between the die 5 and the punch 3. The two shaping sliders 2 and 8 are arranged symmetrically on both sides of the punch 3. A third space is provided on the base plate 1 for the shaping sliders 2 to slide.

[0039] In specific implementation methods, such as Figure 3 As shown, the punch 3 is modularly designed, comprising three sequentially arranged punch modules that form a shape that matches the inner cavity of the forming reinforcement edge. The punch 3 is bolted to the base plate 1, and each of the three punch modules is positioned by a locating pin.

[0040] In a specific embodiment, to facilitate the fitting of the die 5 onto the product to be processed, a clearance area is provided within the cavity of the die 5, and a clamping element is correspondingly provided on the die 5 at the clearance area, achieving clamping after being inverted onto the product to be processed. In this embodiment, the clamping element here is a bolt.

[0041] like Figure 4 As shown, the matching die 5 and punch 3 configured above enable positioning of the product to be processed in the X and Z directions. Further, as... Figure 5 and Figure 6 As shown, the left column 6 is provided with a first side positioning component 61, and the right column 4 is provided with a second side positioning component 62. One of the first side positioning component 61 and the second side positioning component 62 forms a product contact surface, and the other is a clamping component. The first and second side positioning components can position the product to be processed in the Y direction. In this embodiment, the clamping component can be a bolt. In this embodiment, the left column 6 is provided with a product contact surface, and the right column 4 is provided with a clamping component.

[0042] In a specific embodiment, the side of the punch 3 is provided with a limiting surface that allows the shaping slider to slide while preventing overpressure.

[0043] In a specific embodiment, a guide block is provided on the base plate 1, and a guide groove is provided on the shaping slider. When installing the shaping slider, the guide groove and the guide block are matched and installed to facilitate the entry or exit of the shaping slider.

[0044] In a preferred embodiment, two wedge-shaped blocks are provided on the outer sides of the left column 6 and the right column 4, the wedge-shaped surfaces of the two wedge-shaped blocks are matched with each other, and each wedge-shaped block is locked to the base plate 1 by bolts, and the wedge-shaped structure plays a tightening role.

[0045] The materials of the above-mentioned preparation device can be hot work die steel or nickel-based high-temperature alloys, including but not limited to H13, GH4169, etc., so that the mold can be used in room temperature and high temperature environments respectively, which is suitable for high temperature stress relaxation forming scenarios.

[0046] The specific process of preparing the leading edge metal reinforcing edge of the aero-engine fan blade using the above-mentioned preparation device includes mold closing, processing, and demolding.

[0047] The mold closing process can be described as follows: The product to be shaped is placed on the punch 3, one end of the product is pressed tightly against the positioning piece in the left column 6, and the other end is pressed against the clamping piece in the right column 4. The product is then installed into the die 5, and the die 5, left column 6, and right column 4 are locked with bolts. The product is then pressed against the side by the clamping piece on the die 5 located in the clearance area. The shaping sliders 2 and 8 are pushed in along the guide block on the base plate 1 until they reach the limit position. The bolts are then locked, and the mold closing is completed. The product fixed in the preparation device is then subjected to high-temperature or low-temperature molding treatment. After the treatment is completed, the demolding step begins.

[0048] Demolding is the opposite of mold closing. Specifically, it can be described as follows: loosen all the bolts that lock the shaping sliders 2 and 8 and the die 5, separate the shaping sliders 2 and 8 from the mold closing state, loosen the clamping parts on the die 5, remove the die 5, loosen the right column 4 that provides side clamping, and screw out the product.

[0049] Example 2

[0050] refer to Figure 7 As shown, the apparatus for preparing the leading edge metal reinforcing edge of the aero-engine fan blade provided in this embodiment also includes a clamping and limiting frame 7. The die 5, punch 3, and shaping sliders 2 and 8 form an integral structure. The clamping and limiting frame 7 is sleeved outside the integral structure and fixed on the base plate 1, which clamps the die and shaping slider while preventing the shaping slider from falling off, thus improving the reliability of the device. The rest is the same as in Embodiment 1.

[0051] In a specific implementation, the clamping and limiting frame 7 can be a detachable structure, consisting of three parts spliced ​​together to form a door frame structure. During mold closing, the middle part presses down on the die from above, and the clamping bolts on both sides clamp and push the shaping sliders 2 and 8; during demolding, the clamping and limiting frame 7 is removed first, and then the die 5 and the shaping sliders 2 and 8 are opened in sequence.

[0052] Example 3

[0053] refer to Figure 1 As shown, in the apparatus for preparing the leading edge metal reinforcing edge of an aero-engine fan blade provided in this embodiment, the shaping slider is equipped with an ejection mechanism to assist in the retraction of the shaping slider. In this embodiment, the ejection mechanism can adopt a threaded pair structure or a standard bolt. Specifically, if a standard bolt is used, six bolts can be provided. When the bolts are screwed in clockwise, the shaping slider gradually retracts. The rest is the same as in Embodiment 1.

[0054] Example 4

[0055] refer to Figure 1 As shown, in the apparatus for preparing the leading edge metal reinforcing edge of the aero-engine fan blade provided in this embodiment, the shaping slider is provided with a first handle to assist in the retraction operation of the shaping slider. The rest is the same as in Embodiment 1.

[0056] Example 5

[0057] refer to Figure 1 As shown, in the apparatus for preparing the leading edge metal reinforcing edge of the aero-engine fan blade provided in this embodiment, the die 5 is provided with a second handle to assist in the disengagement of the die 5. The rest is the same as in Embodiment 1.

[0058] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An apparatus for preparing a metal reinforcing edge at the leading edge of an aero-engine fan blade, characterized in that, include: Base plate (1); The left column (6) and right column (4) are arranged in a basically symmetrical manner and are respectively set at both ends of the base plate (1); A matching die (5) and a punch (3) are provided. The die (5) and the punch (3) are arranged vertically within the first space formed by the base plate (1), the left column (6) and the right column (4). The punch (3) is fixed on the base plate (1). The die (5) has a recessed cavity for accommodating the product to be processed. The shape of the punch (3) matches the shape of the inner cavity of the forming reinforcement edge. A second space for installing the product to be processed is formed between the die (5) and the punch (3). Two shaping sliders (2, 8) are arranged symmetrically on both sides of the punch (3), and a third space is provided on the base plate (1) for the shaping sliders (2, 8) to slide. The cavity on the die (5) is provided with a clearance area, and a clamping member is provided on the die (5) at the clearance area. The left column (6) is provided with a first side positioning component, and the right column (4) is provided with a second side positioning component. Of the first side positioning component and the second side positioning component, one forms the product contact surface, and the other is a clamping component. It also includes a clamping limit frame (7). The die (5), punch (3) and shaping slider (2, 8) form an integral structure. The clamping limit frame (7) is sleeved outside the integral structure and fixed on the base plate (1). The side of the punch (3) is provided with a limiting surface to prevent the shaping slider (2, 8) from being over-pressurized. The base plate (1) is provided with a guide block, and the shaping slider (2, 8) is provided with a corresponding guide groove. The mold closing process of the preparation device is as follows: the product to be shaped is placed on the punch (3), one end of the product is pressed against the left column (6), and the other end is pressed by the right column (4) and installed into the cavity (5). The cavity (5), the left column (6) and the right column (4) are locked by bolts. The product is pressed by the pusher on the side of the cavity (5) in the clearance area. The shaping slider (2, 8) is pushed in along the guide block on the bottom plate (1) so that the shaping slider (2, 8) is pushed to the limit position. Then the bolts are locked and the mold closing is completed. The demolding process is as follows: loosen all the bolts of the locking shaping slider (2, 8) and the die (5), separate the shaping slider (2, 8) from the mold closing state, loosen the top clamping parts on the die (5), remove the die (5), loosen the right column (4) which plays the role of side clamping, and screw out the product.

2. The apparatus for preparing the leading edge metal reinforcing edge of an aero-engine fan blade according to claim 1, characterized in that, The shaping sliders (2, 8) are provided with an ejection mechanism to assist in the exit operation of the shaping sliders (2, 8).

3. The apparatus for preparing the leading edge metal reinforcing edge of an aero-engine fan blade according to claim 1, characterized in that, The shaping sliders (2, 8) are equipped with a first handle to assist in the exiting operation of the shaping sliders (2, 8).

4. The apparatus for preparing the leading edge metal reinforcing edge of an aero-engine fan blade according to claim 1, characterized in that, The die (5) is provided with a second handle to assist in the disengagement of the die (5).

5. The apparatus for preparing the leading edge metal reinforcing edge of an aero-engine fan blade according to claim 1, characterized in that, The materials used in this preparation device include hot work die steel or nickel-based high-temperature alloys.

Images