Paddle root girder positioning and installing device and method

Abstract

The application provides a device and method for positioning and installing a mast root girder, which comprises a pressing block, a positioning round sleeve, a lower die profile pressing plate, a central guide block, a pressing bolt, an upper die profile pressing block and a pressing plate. The two ends of the pressing block are pressed against the upper plane of the lower die profile pressing plate, and the middle part is pressed against the central guide block. The positioning round sleeve is sleeved on the mast root round sleeve for positioning. The curved surface of the lower die profile pressing plate is matched with the profile of the mast root girder, and the tail part is matched with the side taper surface of the central guide block. The pressing bolt passes through the pressing block, the positioning round sleeve, the mast root round sleeve and the lower die profile pressing plate, and is then screwed into the pressing die. The lower part of the upper die profile pressing block is matched with the upper die surface of the mast root girder, the pressing plate is stacked with the upper die profile pressing block, and the pressing bolt is used for pressing. The device is convenient to operate, meets the positioning and installation requirements of the mast root section girder of the main rotor blade of an unmanned helicopter, and improves the reliability and quality of the positioning and installation process.

Description

Technical Field

[0001] This invention belongs to the field of tooling and fixture design technology, and particularly relates to a positioning and installation device and method for a paddle root beam. Background Technology

[0002] The main rotor blade root section spars structure of an unmanned helicopter primarily consists of the root spars, root sleeve, joint filler blocks, resin and foam filler blocks, and other parts and raw materials. The precise positioning and assembly curing quality of these parts and raw materials significantly impact the manufacturing quality of the main rotor blade. Before curing, the root spars are isolated and their positions are carefully aligned. Simultaneously, before curing, the relative positions of all root components need to be calibrated, requiring high installation accuracy and preventing any displacement during the curing process.

[0003] The assembly quality of the rotor root section parts and raw materials of the unmanned helicopter's main rotor blade directly affects the assembly accuracy of the main rotor blade. Therefore, there is an urgent need to provide a rotor root beam positioning and installation device and method. Summary of the Invention

[0004] The technical problem to be solved by this invention is that the assembly quality of the root section parts and raw materials of the main rotor blade of an unmanned helicopter affects the assembly accuracy of the main rotor blade.

[0005] The technical solution of the present invention is to provide a propeller root beam positioning and installation device and method, which is used to position the upper and lower mold beams of the main propeller blade and clamp the root area of ​​the propeller blade, and to pressurize and limit the fixing of each part in the root area of ​​the propeller blade to prevent the propeller root parts from deviating from their original positions due to excessive force during beam positioning, thereby affecting the molding quality.

[0006] In one aspect, a positioning and installation device for a paddle root beam is provided, comprising a clamping block 1, a positioning sleeve 2, a lower mold retaining plate 3, a central guide block 4, a pressure bolt 5, an upper mold retaining block 6, and a pressure plate 7. The clamping block 1 is pressed against the upper surface of the lower mold shaped pressure plate 3 at both ends and against the central guide block 4 in the middle. The clamping block 1 is connected to the propeller root sleeve. The positioning sleeve 2 is cylindrical, with its top end contacting the clamping block 1 and its bottom end fitting into the positioning hole of the lower mold shaped pressure plate 3. The positioning sleeve 2 is fitted onto the propeller root sleeve to position it. The lower mold shaped pressure plate 3 is an irregularly shaped block with a flat upper part and a curved lower part that matches the profile of the propeller root beam. The tail end has mounting and positioning holes corresponding to the propeller root sleeve. The inner side is a sloping conical surface that matches the conical side surface of the central guide block 4. The central guide block 4 has a notch for positioning and engaging with the lower mold shaped pressure plate 3. The pressure bolt 5 passes through the clamping block 1, the positioning sleeve 2, the paddle root sleeve, and the lower mold forming plate 3 before being screwed into the mold. The lower part of the upper mold shaped pressure block 6 is engaged with the upper mold surface of the propeller root beam, and the tail is provided with an installation positioning hole corresponding to the propeller root sleeve. The pressure plate 7 is stacked with the upper molded pressure block 6 and pressed together with the pressure bolt 5.

[0007] Optionally, the clamping block 1 is a square block with a cuboid shape and square protrusions at both ends, which are pressed against the upper plane of the lower mold shaped pressure plate 3. A square protrusion is arranged in the middle, which is pressed against the central guide block 4. A groove is formed between the protrusions, and two positioning holes are provided at the position corresponding to the paddle root sleeve.

[0008] Optionally, the bottom of the lower mold shaped pressure plate 3 is provided with a positioning boss, which cooperates with the mold glue flow groove for limiting positioning.

[0009] Optionally, the central guide block 4 is an irregular curved surface solid, with a round drum shape at the front and a fishtail shape at the rear. The central guide block 4 is divided into upper and lower sections. The upper interface matches the inner oblique cone surface of the lower mold dimensional pressure plate 3, and the lower interface matches the cone surface of the paddle root foam filling block. The paddle root beam after filling has the same shape as its lower cone surface.

[0010] Optionally, the pressure bolt 5 is a hexagonal bolt that passes through the positioning hole of the clamping block 1, the inner hole of the positioning sleeve 2 and the paddle root sleeve, and the positioning hole of the lower mold shaped pressure plate 3 is then screwed into the threaded hole of the pressure mold.

[0011] Optionally, the upper mold shaped pressure block 6 is an irregularly shaped block with a flat upper part and a concave lower part that mates with the upper mold surface of the propeller root beam. The tail is provided with an installation positioning hole corresponding to the propeller root sleeve. The bottom of the upper mold shaped pressure block 6 is provided with a positioning boss that mates with the pressure mold glue groove for positioning.

[0012] Optionally, the pressure plate 7 is a square block with rounded corners and a mounting hole in the middle. It is stacked with the upper mold shaped pressure block 6 and tightened with the pressure bolts 5.

[0013] Optionally, the bow-shaped clamp 8 is composed of a bow-shaped frame and a screw, which applies pressure to clamp the two sides of the upper mold shaped pressure block 6.

[0014] Secondly, a method for positioning and installing the paddle root beam is provided, including: Step 1: Prepare the lower mold propeller root beam, propeller root sleeve, lower mold joint filler block, resin and foam filler block parts and raw materials, and place them in the corresponding positions of the molding system mold. Step 2: Assemble the clamping block 1, positioning sleeve 2, lower mold shaping plate 3, center guide block 4, and pressure bolt 5. At the same time, position the main blade lower mold beam, and apply pressure to each part of the lower mold and shape it through the pressure bolt 5 and the bow-shaped clamp 8. Step 3: After the lower mold parts have been shaped for a specific time, loosen the bow-shaped clamp 8 and the pressure bolt 5, and take out the clamping block 1, the positioning sleeve 2, the lower mold shaping pressure plate 3, and the center guide block 4. Then prepare the upper mold propeller root beam, the upper mold joint filler block, the resin and foam filler block, and assemble the pressure bolt 5, the upper mold shaping pressure block 6, the pressure plate 7, and the bow-shaped clamp 8. At the same time, the positioning main propeller blade upper mold beam applies pressure to the upper and lower mold parts as a whole through the pressure bolt 5 and the bow-shaped clamp 8 and shapes them. Step four: After the overall shaping time of each part of the upper and lower molds is preset, and the resin is further cured, the propeller root beam positioning and installation device is removed to complete the process of positioning the upper and lower mold beams of the main propeller blade and clamping the root area of ​​the propeller blade.

[0015] The beneficial effects of this application are as follows: The device has a simple structure, is easy to operate, and can meet the positioning and installation requirements of the main rotor blade root section beam of unmanned helicopters, ensuring the reliability of the positioning and installation process, improving work efficiency, and reducing manufacturing risks and quality hazards. Attached Figure Description

[0016] Figure 1 This is an isometric view of the positioning and installation device (when the lower mold root beam is shaped) of the present invention; Figure 2 This is an isometric view of the positioning and installation device of the present invention (when the upper and lower mold root beams are integrally shaped); Figure 3 This is an isometric view of the clamping block of the present invention; Figure 4 This is an isometric view of the positioning sleeve of the present invention; Figure 5 This is an isometric view of the lower mold shaped pressure plate of the present invention; Figure 6 This is an isometric view of the central guide block of the present invention; Figure 7 This is an isometric view of the upper mold shaped pressure block of the present invention; Figure 8 This is a cross-sectional view of the positioning and installation device (when the lower mold root beam is shaped) of the present invention; Figure 9 This is a cross-sectional view of the positioning and installation device of the present invention (when the upper and lower mold root beams are integrally shaped); Among them, 1-pressing block, 2-positioning round sleeve, 3-lower mold shaped pressure plate, 4-center guide block, 5-pressure bolt, 6-upper mold shaped pressure block, 7-pressure plate, 8-bow-shaped clamp. Detailed Implementation

[0017] 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, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0019] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited from each other.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] This invention provides a positioning and installation device for assembling the rotor root beam of an unmanned helicopter. It overcomes the difficulties of simultaneous pressure molding and positioning installation, and can effectively load the rotor root beam to achieve rapid and accurate positioning and installation, and convenient pressure molding. It meets the requirements of accuracy in the installation and positioning of the main rotor blade of the unmanned helicopter and the relative position requirements of the curing process, and satisfies the assembly quality and schedule requirements of the rotor root beam of the main rotor blade of the unmanned helicopter.

[0022] This device is used in conjunction with the molding system and can be used for: a) pressing and fixing the blade root section during the assembly of the blade root beam (one set is required for each of the upper and lower blade root beams); b) applying pressure to the blade from the spanwise side before assembling the upper mold skin of the blade.

[0023] When using this device to shape the lower mold root beam, care should be taken to avoid the bushing while applying pressure to the lower mold root beam; when shaping the upper mold beam, pressure should be applied to the bushing, beam, and joint filler block at the paddle root area at the same time.

[0024] See Figure 1 and Figure 2An embodiment of the present invention provides a positioning and installation device for a paddle root beam, including a clamping block 1, a positioning sleeve 2, a lower mold forming pressure plate 3, a central guide block 4, a pressure bolt 5, an upper mold forming pressure block 6, and a pressure plate 7; See Figure 1 , Figure 3 and Figure 4 The clamping block 1 is clamped at both ends to the upper plane of the lower mold shaped pressure plate 3, and in the middle to the center guide block 4. The clamping block 1 is connected to the propeller root sleeve. The positioning sleeve 2 is cylindrical. The top of the cylinder contacts the clamping block 1, and the bottom end is inserted into the positioning hole of the lower mold shaped pressure plate 3. The positioning sleeve 2 is fitted onto the propeller root sleeve to position the propeller root sleeve. See Figure 5 The lower mold shaped pressure plate 3 is an irregularly shaped block with a flat upper part and a forming curved surface that matches the shape of the propeller root beam at the lower part. The tail is provided with an installation positioning hole corresponding to the propeller root sleeve. The inner side is a sloping conical surface that matches the conical surface on the side of the center guide block 4. The center guide block 4 is provided with a notch that matches the positioning of the lower mold shaped pressure plate 3. The bottom of the lower mold shaped pressure plate 3 is provided with a positioning boss that matches the glue flow groove of the pressure mold for limiting the position. See Figure 8 The pressure bolt 5 passes through the clamping block 1, the positioning sleeve 2, the paddle root sleeve, and the lower mold retaining plate 3 before being screwed into the mold. See Figure 2 and Figure 9 The lower part of the upper mold shaped pressure block 6 mates with the upper mold surface of the propeller root beam, and the tail is provided with an installation positioning hole corresponding to the propeller root sleeve; the pressure plate 7 is stacked with the upper mold shaped pressure block 6 and is pressed tightly with the pressure bolt 5.

[0025] See Figure 3 The clamping block 1 is a square block with a rectangular shape, square protrusions at both ends, and a square protrusion in the middle. See Figure 4 The positioning sleeve 2 is cylindrical. The top of the cylinder contacts the clamping block 1, and the bottom end is inserted into the positioning hole of the lower mold shaped pressure plate 3. The inside of the cylinder is a round hole, into which the paddle root sleeve is inserted for positioning. See Figure 6 The central guide block 4 is an irregular curved solid, with a round drum shape at the front and a fishtail shape at the rear. It has a notch and is positioned and matched with the lower mold dimensional pressure plate 3. The central guide block 4 is divided into upper and lower sections. The upper interface matches the inner inclined cone surface of the lower mold dimensional pressure plate 3, and the lower interface matches the cone surface of the paddle root foam filling block. The paddle root beam after filling has the same shape as its lower cone surface. See Figure 7 The upper mold shaped pressure block 6 is an irregularly shaped block with a flat upper part and a concave lower part that matches the upper mold surface of the propeller root beam. The tail is provided with a mounting positioning hole that corresponds to the propeller root sleeve. The bottom of the upper mold shaped pressure block 6 is provided with a positioning boss that matches the pressure mold flow groove for limiting the position. See Figure 2 The pressure plate 7 is a square block with rounded corners and a mounting hole in the middle. It is stacked with the upper mold shaped pressure block 6 and pressed together with the pressure bolt 5. See Figure 2 The bow-shaped clamp 8 is composed of a bow-shaped frame and a screw, which applies pressure to the two sides of the upper mold shaped pressure block 6.

[0026] The device has a simple structure, is easy to operate, and can meet the positioning and installation requirements of the main rotor blade root section beam of unmanned helicopters, ensuring the reliability of the positioning and installation process, improving work efficiency, and reducing manufacturing risks and quality hazards.

[0027] See Figure 8 and Figure 9 The present invention also provides a method for positioning and installing a paddle root beam, comprising the following steps: Step 1: Prepare the parts and raw materials such as the lower mold propeller root beam, propeller root sleeve, lower mold joint filler block, resin and foam filler block, and place them in the corresponding positions of the molding system mold. Step 2: Assemble the clamping block 1, positioning sleeve 2, lower mold shaping plate 3, center guide block 4, and pressure bolt 5. At the same time, straighten the main blade lower mold beam and apply pressure to each part of the lower mold and shape it through the pressure bolt 5 and bow clamp 8. Step 3: After the lower mold parts have been shaped for a specific time, loosen the bow clamp 8 and pressure bolt 5, and take out the clamping block 1, positioning sleeve 2, lower mold shaping pressure plate 3, and center guide block 4. Then prepare the upper mold propeller root beam, upper mold joint filler block, resin and foam filler block, etc. Assemble the pressure bolt 5, upper mold shaping pressure block 6, pressure plate 7, and bow clamp 8. At the same time, the upper mold beam of the main propeller blade applies pressure to the upper and lower mold parts as a whole through the pressure bolt 5 and bow clamp 8 and shapes them. Step four: After the upper and lower mold parts have been shaped for a specific period of time and the resin has further cured, remove the positioning and installation fixtures of the propeller root beam to complete the process of combing the upper and lower mold beams of the main propeller blade and clamping the root area of ​​the propeller blade.

[0028] The above description merely illustrates embodiments of the present invention and is quite specific and detailed; however, it should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Furthermore, any parts of the present invention not described in detail are conventional techniques.

Claims

1. A positioning and installation device for a paddle root beam, characterized in that, It includes a clamping block (1), a positioning sleeve (2), a lower mold shaped pressure plate (3), a center guide block (4), a pressure bolt (5), an upper mold shaped pressure block (6), a pressure plate (7), and an arc-shaped clamp (8). The clamping block (1) is clamped at both ends to the upper surface of the lower mold shaped pressure plate (3), and in the middle to the center guide block (4). The clamping block (1) is connected to the propeller root sleeve. The positioning sleeve (2) is cylindrical, with its top end contacting the clamping block (1) and its bottom end fitting into the positioning hole of the lower mold shaped pressure plate (3). The positioning sleeve (2) is fitted onto the propeller root sleeve to position it. The lower mold shaped pressure plate (3) is an irregularly shaped block with a flat upper part and a curved lower part that matches the profile of the paddle root beam. The tail end has mounting and positioning holes corresponding to the paddle root sleeve. The inner side is a sloping conical surface that matches the conical side surface of the central guide block (4). The central guide block (4) has a notch that positions and matches the lower mold shaped pressure plate (3). The pressure bolt (5) passes through the clamping block (1), the positioning sleeve (2), the paddle root sleeve, and the lower mold shaped pressure plate (3) before being screwed into the mold. The lower part of the upper mold shaped pressure block (6) is engaged with the upper mold surface of the paddle root beam, and the tail is provided with an installation positioning hole corresponding to the paddle root sleeve; The pressure plate (7) is stacked with the upper mold shaped pressure block (6) and pressed together with the pressure bolt (5). The bow-shaped clamp (8) presses and clamps the two sides of the upper mold shaped pressure block (6).

2. The apparatus as claimed in claim 1, characterized in that, The clamping block (1) is a square block with a rectangular shape and square protrusions at both ends, which are pressed against the upper plane of the lower mold shaped pressure plate (3). A square protrusion is arranged in the middle, which is pressed against the central guide block (4). A groove is formed between the protrusions, and two positioning holes are set at the corresponding positions of the paddle root sleeve.

3. The apparatus as described in claim 1, characterized in that, The bottom of the lower mold shaped pressure plate (3) is provided with a positioning boss, which cooperates with the mold glue flow groove for positioning.

4. The apparatus as claimed in claim 1, characterized in that, The central guide block (4) is an irregular curved surface solid, with a round drum shape at the front and a fish tail shape at the rear. The central guide block (4) is divided into upper and lower sections. The upper interface matches the inner oblique cone surface of the lower mold dimensional pressure plate (3), and the lower interface matches the cone surface of the paddle root foam filling block. The paddle root beam after filling has the same shape as its lower cone surface.

5. The apparatus as claimed in claim 1, characterized in that, The pressure bolt (5) is a hexagonal bolt that passes through the positioning hole of the clamping block (1), the inner hole of the positioning sleeve (2) and the paddle root sleeve, and the positioning hole of the lower mold shaped pressure plate (3) is then screwed into the threaded hole of the pressure mold.

6. The apparatus as claimed in claim 1, characterized in that, The upper mold shaped pressure block (6) is an irregularly shaped block with a flat upper part and a concave lower part that matches the upper mold surface of the propeller root beam. The tail is provided with an installation positioning hole corresponding to the propeller root sleeve. The bottom of the upper mold shaped pressure block (6) is provided with a positioning boss that matches the pressure mold glue groove for positioning.

7. The apparatus as claimed in claim 1, characterized in that, The pressure plate (7) is a square block with rounded corners and a mounting hole in the middle. It is stacked with the upper molded pressure block (6) and pressed tightly with the pressure bolt (5).

8. The apparatus as claimed in claim 1, characterized in that, The bow-shaped clamp (8) consists of a bow-shaped frame and a screw.

9. A method for positioning and installing a paddle root beam, characterized in that, The method for the positioning and installation device for the paddle root beam according to any one of claims 1 to 8 includes: Step 1: Prepare the lower mold propeller root beam, propeller root sleeve, lower mold joint filler block, resin and foam filler block parts and raw materials, and place them in the corresponding positions of the molding system mold. Step 2: Assemble the clamping block (1), positioning sleeve (2), lower mold shaping plate (3), center guide block (4), and pressure bolt (5). At the same time, position the main blade lower mold beam and apply pressure to each part of the lower mold and shape it through the pressure bolt (5) and bow clamp (8). Step 3: After the lower mold parts have been shaped for a specific time, loosen the bow clamp (8) and the pressure bolt (5), and take out the clamping block (1), positioning sleeve (2), lower mold shaping pressure plate (3), and center guide block (4). Then prepare the upper mold propeller root beam, upper mold joint filler block, resin and foam filler block, and assemble the pressure bolt (5), upper mold shaping pressure block (6), pressure plate (7), and bow clamp (8). At the same time, the positioning main propeller blade upper mold beam applies pressure to the upper and lower mold parts as a whole and shapes them through the pressure bolt (5) and bow clamp (8). Step four: After the overall shaping time of each part of the upper and lower molds is preset, and the resin is further cured, the propeller root beam positioning and installation device is removed to complete the process of positioning the upper and lower mold beams of the main propeller blade and clamping the root area of ​​the propeller blade.

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