A composite material blade edge bonding tool

Abstract

The present invention discloses a composite material propeller blade edge wrapping and gluing tool, comprising an upper mold, a lower mold and a pressure plate, wherein the lower mold is composed of a lower mold 1 and a lower mold 2 joined together on the left and right sides, and the upper mold is correspondingly arranged above the lower mold 1; both sides of the lower mold 1 and the lower mold 2 in the length direction are provided with limiting inclined surfaces that match the inclined surfaces of the edge plates on the propeller blades, and the limiting inclined surfaces and the inclined surfaces of the edge plates cooperate with each other to achieve chord-wise positioning of the propeller blades; the inner surfaces of the edge plates on both sides of the propeller blades are tightly pressed against the two sides of the length direction of the lower mold 1, so that the propeller blades can be just clamped on the lower mold 1 to achieve span-wise positioning of the propeller blades; one end of the pressure plate is located above the upper mold, and the other end is located above the lower mold 2, and the downward pressure of the pressure plate can achieve the limitation of the thickness of the propeller blade body. The present invention ensures the quality of the trailing edge of the composite material propeller blades and improves the product quality stability of the composite material propeller blades.

Description

Technical Field

[0001] The present invention relates to a tool used for processing a blade, and more particularly to a tool for edge binding and gluing a composite material blade. Background Art

[0002] Composite propeller blades are used in large aircraft, which helps reduce aircraft weight and increase efficiency. Due to the special structure of composite propeller blades, usually only the blade body is thick, and the leading and trailing edges are thin-walled structures. The leading edge of the blade is generally rimmed with metal such as nickel to increase wear resistance and improve the impact resistance of the blade. However, the existing technology does not rim the trailing edge of the blade. Without protection, the trailing edge of the composite propeller blade is prone to edge wear and material shortage, affecting the quality of the composite propeller blade.

[0003] Therefore, it is necessary to improve the protection of the trailing edge of the blade by composite edge bonding and add cloth layer edge bonding, but the existing edge bonding tooling is only suitable for metal edge bonding of the leading edge of the blade, such as Figure 1 、 2 As shown in the figure, it only has chord-wise positioning. When the trailing edge of the glued blade is wrapped, there is no positioning reference in the length direction of the blade, which can easily cause the cloth layer to slip in this direction. At the same time, there is no pressure limit in the thickness direction of the blade body, which can easily cause the edge-wrapped glued cloth layer to be over-pressed, causing slippage and dislocation (local material shortages). If the pressure is too small, the wrapping will be higher than the blade body surface or even delamination will occur.

[0004] Therefore, how to improve the existing composite material blade edge binding and gluing tooling so that it can improve the surface quality of the blade trailing edge after edge binding and gluing is a topic that technical personnel in this field need to study. Summary of the Invention

[0005] In view of this, the present invention proposes a composite material blade edge binding and gluing tooling, and its specific technical solution is as follows:

[0006] A composite material blade edge gluing tool is suitable for gluing the trailing edge of a composite material blade with edge plates on both sides. The edge plates are perpendicular to the blade, and the side surfaces of the edge plates corresponding to the leading edge and the trailing edge of the blade are edge plate inclined surfaces inclined in the same direction.

[0007] The gluing tool comprises an upper mold, a lower mold and a pressing plate, the lower mold being composed of a lower mold 1 and a lower mold 2 which are spliced together on the left and right sides, the upper mold being correspondingly arranged above the lower mold 1, and the two working together up and down to clamp the trailing edge of the blade; both sides of the lower mold 1 and the lower mold 2 in the longitudinal direction are provided with limiting inclined surfaces which cooperate with the inclined surfaces of the edge plates, and the limiting inclined surfaces cooperate with the inclined surfaces of the edge plates to abut against each other, so as to achieve chord-wise positioning of the blade; the inner surfaces of the edge plates on both sides of the blade are tightly against the two sides in the longitudinal direction of the lower mold 1, so that the blade can be just clamped on the lower mold 1 to achieve span-wise positioning of the blade; one end of the pressing plate is located above the upper mold, and the other end is located above the lower mold 2; a bolt hole 1 is provided on the upper surface of the lower mold 2, and a bolt hole 2 is provided on the pressing plate, and the two ends of the bolt 1 are respectively screwed into the bolt hole 1 and the bolt hole 2. By rotating the bolt 1, the pressing plate can be pressed down to achieve limiting the thickness of the blade body.

[0008] By adopting the above technical solution, the present invention improves existing composite blade edge gluing tooling, adding a reference positioning during the gluing process and adding directional limits to prevent defects caused by edge slippage. These technical improvements ensure the quality of the composite blade's trailing edge and improve the product quality stability of composite blades.

[0009] Preferably, when the gap between the bottom surface of the pressure plate and the top surface of the blade is zero, the pressure plate is pressurized into place.

[0010] Preferably, the tops of the limiting inclined surfaces on both sides of the second lower mold are further provided with limiting grooves for fixing the outer corners of the edge plates.

[0011] Preferably, the upper surface of the lower mold 2 is provided with a plurality of bolt holes 1, and the plurality of bolt holes 1 are arranged in a row along the chord direction of the blade. The bolt holes 1 at different positions cooperate with the bolt holes 2 and the bolt 1, so that the pressure plate can adjust its position along the chord direction of the blade.

[0012] Preferably, a group of three bolt holes are correspondingly provided on the upper die and the lower die, and the bolts are screwed into the corresponding group of three bolt holes to achieve the upper and lower fixed connection between the upper die and the lower die. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0014] Figure 1This is a front view of the existing blade edge gluing tooling.

[0015] Figure 2 This is a side view of the existing blade edge gluing tooling.

[0016] Figure 3-Figure 5 This is an axonometric view of a composite material blade edge binding and gluing tooling according to the present invention.

[0017] Figure 6 The figure is a top view of a composite material blade edge binding and gluing tooling according to the present invention.

[0018] Figure 7 This is a front view of the tooling for positioning the blades of the present invention.

[0019] Figure 8-Figure 9 It is a side view of the tooling of the present invention for positioning the blades.

[0020] In the figure: 1-upper die, 2-lower die 1, 3-lower die 2, 4-pressing plate, 5-limiting inclined surface, 6-bolt hole 1, 7-bolt 1, 8-limiting groove, 9-bolt 2, 10-blade, 11-edge plate, 12-blade leading edge, 13-blade trailing edge. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example:

[0023] like Figure 3-Figure 6 As shown, the present invention provides a composite material blade edge wrapping and gluing tool, which is suitable for wrapping and gluing the trailing edge of a composite material blade 10 with edge plates 11 on both sides. The edge plates 11 and the blade 10 are perpendicular to each other, and the two side surfaces of the edge plate 11 corresponding to the blade leading edge 12 and the blade trailing edge 13 are edge plate inclined surfaces inclined in the same direction.

[0024] The gluing tooling includes an upper mold 1, a lower mold and a pressure plate 4. The lower mold is composed of a lower mold 1 2 and a lower mold 2 3 assembled together. The upper mold 1 is correspondingly arranged above the lower mold 1 2, and the two work together to clamp the trailing edge 13 of the blade.

[0025] Specifically, a group of three bolt holes are correspondingly provided on the upper mold 1 and the lower mold 2, and the bolts 9 are screwed into the corresponding group of three bolt holes to achieve the upper and lower fixed connection between the upper mold 1 and the lower mold 2, and then clamp the trailing edge 13 of the blade extending between the two.

[0026] Both sides of the length direction of the lower mold 1 2 and the lower mold 2 3 are provided with limiting inclined surfaces 5 that cooperate with the inclined surfaces of the edge plates. The limiting inclined surfaces 5 cooperate with the inclined surfaces of the edge plates to abut against each other, thereby realizing the chord-wise positioning of the blade 10.

[0027] The inclined positioning surfaces between lower mold 1 2, lower mold 2 3 and edge plate 11 realize the positioning of blade 10 between lower mold 1 2, lower mold 2 3, i.e., chord-wise positioning. Moreover, the inclined positioning surfaces bring about the squeezing force of lower mold 1 2, lower mold 2 3 on edge plate 11, which further enhances the positioning accuracy.

[0028] Furthermore, limiting grooves 8 for fixing the outer corners of the edge plates 11 are provided on the tops of the limiting inclined surfaces 5 on both sides of the lower mold 3 .

[0029] The inner surfaces of the edge plates 11 on both sides of the blade 10 are tightly against the two side edges of the lower mold 2 in the length direction, so that the blade 10 can be just fixed on the lower mold 2 to achieve span-wise positioning of the blade 10.

[0030] The present invention improves the length design of the lower mold 1 2 so that it can be compatible with the corresponding paddle blade 10 , so that the paddle blade 10 can be just fixed on the lower mold 1 2 .

[0031] One end of the pressure plate 4 is located above the upper mold 1, and the other end is located above the lower mold 2 3; a bolt hole 6 is provided on the upper surface of the lower mold 2 3, and a bolt hole 2 is provided on the pressure plate 4. The two ends of the bolt 1 7 are respectively screwed into the bolt hole 1 6 and the bolt hole 2. By rotating the bolt 1 7, the pressure plate 4 can be pressed down to limit the thickness of the blade 10.

[0032] Furthermore, the upper surface of the lower mold 2 3 is provided with a plurality of bolt holes 6, and the plurality of bolt holes 6 are arranged in a row along the chord direction of the blade 10. The bolt holes 6 at different positions cooperate with the bolt holes 2 and the bolts 1 7, so that the pressure plate 4 can be adjusted in position along the chord direction of the blade 10.

[0033] Since the composite material edge of the composite blade trailing edge 13 needs to be formed by bonding process, the bonding tool of the present invention is designed during the bonding process, such as Figure 1 、 2 As shown, the original bonding tool only has chord-wise positioning. When bonding the trailing edge, there is no positioning reference in the length direction of the blade 10, which can easily cause the fabric layer to slip in this direction. Figure 7-Figure 9As shown, the present invention has made corresponding tooling improvements, and added span-wise positioning on the basis of chord-wise positioning: the inner surfaces of the edge plates 11 on both sides of the blade 10 are used as span-wise positioning references to avoid slippage or dislocation along the length direction when gluing the trailing edge hemming; at the same time, a limit is added in the thickness direction of the blade body: the theoretical profile thickness of the blade body is used as the limit reference, and pressure is applied by bolts. When the gap between the bottom surface of the pressure plate 4 and the top surface of the blade 10 is zero, the pressure plate 4 is pressurized into place, avoiding the defects caused by the slippage of the hemming cloth layer along the chord direction, and improving the surface quality after hemming and gluing.

[0034] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A composite material blade edge binding and gluing tool, characterized in that: It is suitable for gluing the trailing edge of composite blades with edge plates on both sides. The edge plates are perpendicular to the blades, and the two side surfaces of the edge plates corresponding to the leading edge and the trailing edge of the blade are edge plate inclined surfaces inclined in the same direction. The gluing tool comprises an upper mold, a lower mold and a pressure plate, the lower mold is composed of a lower mold 1 and a lower mold 2 which are spliced together on the left and right, the upper mold is correspondingly arranged above the lower mold 1, and the two work together to clamp the trailing edge of the blade; both side edges of the lower mold 1 and the lower mold 2 in the length direction are provided with limiting inclined surfaces that match the inclined surfaces of the edge plates, and the limiting inclined surfaces cooperate with the inclined surfaces of the edge plates to achieve chord-wise positioning of the blades; the inner surfaces of the edge plates on both sides of the blades are tightly against the two side edges in the length direction of the lower mold 1, so that the blades can be just clamped on the lower mold 1 to achieve span-wise positioning of the blades; one end of the pressure plate is located above the upper mold, and the other end is located above the lower mold 2 Above; the upper surface of the lower mold two is provided with a bolt hole one, and the pressure plate is provided with a bolt hole two, and the two ends of the bolt one are respectively screwed into the bolt hole one and the bolt hole two, and the pressure plate can be pressed down by rotating the bolt one to achieve the limitation of the thickness of the blade body; the upper surface of the lower mold two is provided with a plurality of bolt holes one, and the plurality of bolt holes one are arranged in a row along the chord direction of the blade, and the bolt holes one at different positions cooperate with the bolt hole two and the bolt one, so that the pressure plate can adjust the position along the chord direction of the blade; the upper mold and the lower mold one are provided with corresponding groups of bolt holes three, and the bolt two is screwed into the corresponding group of bolt holes three to achieve the upper and lower fixed connection of the upper mold and the lower mold one.

2. The composite blade edge binding and gluing tool according to claim 1, characterized in that: When the gap between the bottom surface of the pressure plate and the top surface of the blade is zero, the pressure plate is pressed into place.

3. The composite blade edge binding and gluing tool according to claim 1, characterized in that: The tops of the limiting inclined surfaces on both sides of the second lower mold are also provided with limiting grooves for fixing the outer corners of the edge plates.

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