Paddle root girder positioning and mounting device and method

Abstract

The invention provides a paddle root girder positioning and mounting device and method.The device comprises a pressing block, a positioning round sleeve, a lower die dimension type pressing plate, a center guide block, a pressurizing bolt, an upper die dimension type pressing block and a pressurizing pressing plate, the two ends of the pressing block are pressed against the upper plane of the lower die dimension type pressing plate, and the middle of the pressing block is pressed against the center guide block; the positioning round sleeve is connected to the paddle root round sleeve in a sleeving mode for positioning, the curved surface of the lower die dimension type pressing plate is matched with the profile of a paddle root girder, the tail of the lower die dimension type pressing plate is matched with the conical surface of the side face of the center guide block, and the pressurizing bolt penetrates through the pressing block, the positioning round sleeve, the paddle root round sleeve and the lower die dimension type pressing plate and then is screwed into the pressing die. The lower portion of the upper die shape maintaining pressing block is matched with the profile of an upper die of the paddle root girder, and the pressurizing pressing plate and the upper die shape maintaining pressing block are stacked and pressed through the pressurizing bolt. The device is convenient to operate, the positioning and mounting requirements of the main blade root section girder of the unmanned helicopter are met, and the reliability and quality in the positioning and mounting process are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fixture design, and in particular relates to a propeller root beam positioning and installation device and method. Background Art

[0002] The main rotor blade root section girder structure for unmanned helicopters primarily consists of components and materials, including the root girder, root sleeve, joint filler, and resin and foam filler. The precise positioning and assembly and curing quality of these components and materials significantly impact the manufacturing quality of the main rotor blade. Prior to curing, the root girder is isolated and aligned. Furthermore, the relative positions of the various root components must be calibrated before curing. High assembly accuracy is essential to prevent displacement during the curing process.

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

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

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

[0006] In the first aspect, a blade root beam positioning and installation device is provided, comprising a clamping block 1, a positioning sleeve 2, a lower die dimensional pressure plate 3, a center guide block 4, a pressure bolt 5, an upper die dimensional pressure block 6, and a pressure plate 7. The two ends of the clamping block 1 are pressed tightly against the upper plane of the lower die dimensional pressing plate 3, and the middle part is pressed tightly against the central guide block 4. The clamping block 1 is connected to the propeller root circular sleeve; the positioning circular sleeve 2 is cylindrical, the top of the cylinder contacts the clamping block 1, and the bottom end is fitted into the positioning circular hole of the lower die dimensional pressing plate 3. The positioning circular sleeve 2 is sleeved on the propeller root circular sleeve to position the propeller root circular sleeve. The lower die dimensional pressing plate 3 is a special-shaped block, the upper part is a plane, the lower part is a forming curved surface that matches the surface of the propeller root beam, the tail is provided with a mounting positioning hole corresponding to the propeller root circular sleeve, the inner side is an oblique cone surface, which matches the side cone surface of the center guide block 4, and the center guide block 4 is provided with a notch that matches the positioning of the lower die dimensional pressing plate 3. The pressure bolt 5 passes through the clamping block 1, the positioning sleeve 2, the blade root sleeve, the lower die dimensional pressure plate 3 and then is screwed into the die. The lower part of the upper mold dimensional pressing block 6 cooperates with the upper mold surface of the propeller root beam, and the tail is provided with a mounting positioning hole corresponding to the propeller root circular sleeve; The pressure plate 7 is stacked with the upper die dimensional pressing block 6 and is compressed by the pressure bolt 5 .

[0007] Optionally, the clamping block 1 is a square block with a rectangular shape and square protrusions at both ends, which are pressed against the plane on the lower mold dimensional pressure plate 3. A square protrusion is arranged in the middle, which is pressed against the center guide block 4. Grooves are formed between the protrusions, and two positioning holes are set corresponding to the blade root sleeve.

[0008] Optionally, a positioning boss is provided at the bottom of the lower die dimensional pressing plate 3 to cooperate with the die glue flow groove for limiting positioning.

[0009] Optionally, the center guide block 4 is an irregular curved solid with a drum-shaped front and a fishtail-shaped rear. The center guide block 4 is divided into upper and lower boundaries, the upper interface cooperates with the inner oblique conical surface of the lower mold dimensional pressure plate 3, and the lower interface matches the conical surface of the propeller root foam filling block. The filled propeller root beam is consistent with the shape of its lower conical surface.

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

[0011] Optionally, the upper mold dimensional pressure block 6 is a special-shaped block with a flat upper part and a concave lower part that cooperates with the upper model surface of the propeller root beam. The tail is provided with an installation positioning hole corresponding to the propeller root circular sleeve. A positioning boss is provided at the bottom of the upper mold dimensional pressure block 6, which cooperates with the die glue flow groove to limit the position.

[0012] Optionally, the pressure plate 7 is a square block with arcs at the four corners and a mounting hole in the middle. It is stacked with the upper mold dimensional pressure block 6 and tightened with the pressure bolt 5.

[0013] Optionally, the bow clamp 8 is composed of a bow frame and a screw, and pressurizes and clamps the two side surfaces of the upper mold dimensional pressing block 6.

[0014] In a second aspect, a method for positioning and installing a propeller root beam is provided, comprising: Step 1: Prepare the lower mold blade root beam, blade root sleeve, lower mold joint filler, resin and foam filler parts and raw materials, and place them in the relative positions of the molding system; Step 2: Assemble the clamping block 1, positioning sleeve 2, lower die shaping plate 3, center guide block 4, and pressure bolt 5. At the same time, position the main blade lower die beam, and apply pressure to the lower die parts through the pressure bolt 5 and bow clamp 8 to maintain the shape. Step 3: After the parts of the lower mold have been shaped for a specific time, loosen the bow clamp 8 and the pressure bolt 5, take out the clamping block 1, the positioning sleeve 2, the lower mold shaping plate 3, and the center guide block 4, then prepare the upper mold blade root beam, the upper mold joint filling block, the resin and foam filling blocks, and assemble the pressure bolt 5, the upper mold shaping block 6, the pressure plate 7, and the bow clamp 8. At the same time, position the upper mold beam of the main blade and apply pressure to the upper and lower mold parts as a whole through the pressure bolt 5 and the bow clamp 8 to shape them; Step 4: After the overall shaping of the parts of the upper and lower molds for the preset time and the resin is further solidified, the blade root beam positioning and installation device is removed to complete the process of positioning the upper and lower mold beams of the main blade and clamping the blade root area.

[0015] The beneficial effects of this application are: The device has a simple structure and is easy to operate. It can meet the positioning and installation requirements of the root section beam of the main rotor blade of an unmanned helicopter, ensure the reliability of the positioning and installation process, improve work efficiency, and reduce manufacturing risks and quality hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an isometric view of the positioning and mounting device of the present invention (when the lower die root beam is dimensioned); Figure 2 This is an isometric view of the positioning and mounting device of the present invention (when the upper and lower mold root beams are integrally dimensioned); Figure 3 is an axonometric view of the compression block of the present invention; Figure 4 It is an isometric view of the positioning sleeve of the present invention; Figure 5 is an isometric view of the lower die dimensional pressing plate of the present invention; Figure 6 is an axonometric view of the center guide block of the present invention; Figure 7 It is an isometric view of the upper die dimensional pressing block of the present invention; Figure 8 This is a cross-sectional view of the positioning and mounting device of the present invention (when the lower mold root beam is dimensioned); Figure 9 This is a cross-sectional view of the positioning and mounting device of the present invention (when the upper and lower mold root beams are integrally dimensioned); Among them, 1- clamping block, 2- positioning sleeve, 3- lower die dimensional pressure plate, 4- center guide block, 5- pressure bolt, 6- upper die dimensional pressure block, 7- pressure plate, 8- bow clamp. DETAILED DESCRIPTION

[0017] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0018] The features and illustrative embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed in order to provide a comprehensive understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific arrangement and method proposed below, but rather encompasses any improvements, replacements, and modifications to structures, methods, and devices without departing from the spirit of the present invention. In the accompanying drawings and the following description, well-known structures and techniques are not shown to avoid unnecessary ambiguity in the present invention.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other, and the various embodiments may refer to and quote each other.

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

[0021] An embodiment of the present invention provides a positioning and installation device for assembling the blade root beam of an unmanned helicopter, which overcomes the difficulty of simultaneous pressurizing and positioning installation, can facilitate effective loading of the blade root beam, and achieve fast and accurate positioning and installation, and convenient pressurizing, and meets the requirements of the installation positioning accuracy and relative position of the main rotor blade of the unmanned helicopter during the curing process, and meets the assembly quality and progress requirements of the blade root section beam of the main rotor blade of the unmanned helicopter.

[0022] This device is used in conjunction with the molding system die and can be used for: a. Pressing and fixing the root beams at the blade root during assembly (one set of upper and lower root beams is required); b. Pressurizing the beams from the side before the blade is assembled with the upper mold skin.

[0023] When using this device to shape the root beam of the lower mold, care should be taken to avoid the bushing while applying pressure to the root beam of the lower mold; when shaping the upper mold beam, consideration should be given to applying pressure to the bushing, beam, and joint filler blocks at the root of the propeller.

[0024] See also Figure 1 and Figure 2An embodiment of the present invention provides a propeller root beam positioning and installation device, comprising a clamping block 1, a positioning sleeve 2, a lower die dimensional pressure plate 3, a center guide block 4, a pressure bolt 5, an upper die dimensional pressure block 6, and a pressure plate 7; See also Figure 1 、 Figure 3 and Figure 4 , the two ends of the pressing block 1 are pressed tightly against the upper plane of the lower die dimensional pressing plate 3, the middle part is pressed tightly against the central guide block 4, and the pressing block 1 is connected to the propeller root circular sleeve; the positioning circular sleeve 2 is cylindrical, the top of the cylinder contacts the pressing block 1, and the bottom end is inserted into the positioning circular hole of the lower die dimensional pressing plate 3. The positioning circular sleeve 2 is sleeved on the propeller root circular sleeve to position the propeller root circular sleeve; See also Figure 5 The lower die dimensional pressing plate 3 is a special-shaped block with a flat upper part and a formed curved surface that matches the surface of the propeller root beam at the lower part. The tail is provided with a mounting positioning hole corresponding to the propeller root circular sleeve, and the inner side is an oblique conical surface that matches the side conical surface of the center guide block 4. The center guide block 4 is provided with a notch that is positioned and matched with the lower die dimensional pressing plate 3. A positioning boss is provided at the bottom of the lower die dimensional pressing plate 3 to limit the position in conjunction with the die glue flow groove; See also Figure 8 , the pressure bolt 5 passes through the clamping block 1, the positioning sleeve 2, the propeller root sleeve, the lower die dimensional pressure plate 3 and then screwed into the die. See also Figure 2 and Figure 9 The lower part of the upper die dimensional pressure block 6 cooperates with the upper model surface of the propeller root beam, and the tail is provided with an installation positioning hole corresponding to the propeller root circular sleeve; the pressure plate 7 is stacked with the upper die dimensional pressure block 6 and is tightened with a pressure bolt 5.

[0025] See also Figure 3 , the pressing block 1 is a square block with a rectangular shape, square convex blocks at both ends and a square convex block arranged in the middle; See also Figure 4 The positioning sleeve 2 is cylindrical, the top of the cylinder contacts the pressing block 1, and the bottom is fitted into the positioning hole of the lower die-shaped pressing plate 3. The inside of the cylinder is a circular hole, which is inserted into the propeller root sleeve for positioning; See also Figure 6 The center guide block 4 is a special-shaped curved surface entity, with a drum shape at the front and a fishtail shape at the rear. A notch is provided to position and cooperate with the lower die dimensional pressing plate 3. The center guide block 4 is divided into upper and lower boundaries. The upper interface cooperates with the inner oblique conical surface of the lower die dimensional pressing plate 3, and the lower interface matches the conical surface of the propeller root foam filling block. The filled propeller root beam has the same shape as its lower conical surface. See also Figure 7 The upper die dimensional pressing block 6 is a special-shaped block with a flat upper part and an inner concave lower part that matches the upper model surface of the propeller root beam. The tail is provided with a mounting positioning hole corresponding to the propeller root circular sleeve. The bottom of the upper die dimensional pressing block 6 is provided with a positioning boss that cooperates with the die flow groove to limit the position. See also Figure 2 , the pressure plate 7 is a square block with arcs at the four corners and a mounting hole in the middle. It is stacked with the upper die-shaped pressure block 6 and is tightened with a pressure bolt 5; See also Figure 2 The bow clamp 8 is composed of a bow frame and a screw, which pressurizes and clamps the two side surfaces of the upper die-shaped pressing block 6.

[0026] The device has a simple structure and is easy to operate. It can meet the positioning and installation requirements of the root section beam of the main rotor blade of an unmanned helicopter, ensure the reliability of the positioning and installation process, improve work efficiency, and reduce manufacturing risks and quality hazards.

[0027] See also Figure 8 and Figure 9 The present invention also provides a method for positioning and installing a propeller root beam, comprising the following steps: Step 1: Prepare the lower mold blade root beam, blade root sleeve, lower mold joint filler, resin and foam filler and other parts and raw materials, and place them in the relative positions of the molding system; Step 2: Assemble the clamping block 1, the positioning sleeve 2, the lower die shaping plate 3, the center guide block 4, and the pressure bolt 5. At the same time, comb the lower die beam of the main blade, and apply pressure to the parts of the lower die and shape them through the pressure bolt 5 and the bow clamp 8. Step 3: After the parts of the lower mold have been shaped for a specific time, loosen the bow clamp 8 and the pressure bolt 5, take out the clamping block 1, the positioning sleeve 2, the lower mold shaping plate 3, and the center guide block 4, then prepare the upper mold blade root beam, the upper mold joint filling block, the resin and foam filling blocks, etc., assemble the pressure bolt 5, the upper mold shaping block 6, the pressure plate 7, and the bow clamp 8. At the same time, comb the upper mold beam of the main blade to apply pressure to the upper and lower mold parts as a whole through the pressure bolt 5 and the bow clamp 8 to shape them; Step 4: After the overall dimensions of the upper and lower mold parts have been shaped for a specific time and the resin has been further solidified, the blade root beam positioning and installation fixture is removed to complete the process of combing the upper and lower mold beams of the main blade and clamping the blade root area.

[0028] The above merely describes the embodiments of the present invention, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Furthermore, any portions not described in detail herein are conventional techniques.

Claims

1. A propeller root beam positioning and installation device, characterized in that: It includes a clamping block (1), a positioning sleeve (2), a lower die dimensional pressure plate (3), a center guide block (4), a pressure bolt (5), an upper die dimensional pressure block (6), and a pressure plate (7). The two ends of the clamping block (1) are clamped to the upper plane of the lower die dimensional pressure plate (3), and the middle part is clamped to the central guide block (4). The clamping block (1) is connected to the propeller root circular sleeve; the positioning circular sleeve (2) is cylindrical, the top end of the cylinder contacts the clamping block (1), and the bottom end is inserted into the positioning circular hole of the lower die dimensional pressure plate (3). The positioning circular sleeve (2) is sleeved on the propeller root circular sleeve to position the propeller root circular sleeve. The lower die dimensional pressure plate (3) is a special-shaped block, the upper part is a plane, the lower part is a forming curved surface that matches the blade root beam profile, the tail is provided with a mounting positioning hole corresponding to the blade root circular sleeve, the inner side is an oblique cone surface that matches the side cone surface of the center guide block (4), and the center guide block (4) is provided with a notch that matches the positioning of the lower die dimensional pressure plate (3). The pressure bolt (5) passes through the clamping block (1), the positioning sleeve (2), the blade root sleeve, the lower die dimensional pressure plate (3) and then is screwed into the die. The lower part of the upper mold dimensional pressing block (6) cooperates with the upper model surface of the propeller root beam, and the tail is provided with a mounting positioning hole corresponding to the propeller root circular sleeve; The pressure plate (7) is stacked on the upper die dimensional pressure block (6) and is compressed by the pressure bolt (5).

2. The device according to claim 1, wherein The pressing 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 die dimensional pressure plate (3). A square protrusion is arranged in the middle, which is pressed against the central guide block (4). Grooves are formed between the protrusions, and two positioning holes are set at positions corresponding to the blade root circular sleeve.

3. The device according to claim 1, wherein The bottom of the lower die dimensional pressing plate (3) is provided with a positioning boss which cooperates with the die glue flow groove for limiting position.

4. The device according to claim 1, wherein The central guide block (4) is a special-shaped curved surface entity, with a drum-shaped front portion and a fishtail-shaped rear portion. The central guide block (4) is divided into upper and lower boundaries, the upper interface matches the inner oblique conical surface of the lower mold dimensional pressure plate (3), and the lower interface matches the conical surface of the propeller root foam filling block. The propeller root beam after filling is consistent with the shape of its lower conical surface.

5. The device according to claim 1, wherein The pressure bolt (5) is a hexagonal bolt that passes through the positioning hole of the clamping block (1), the positioning circular sleeve (2) and the inner circular hole of the blade root circular sleeve, and the positioning circular hole of the lower mold dimensional pressure plate (3) is then screwed into the threaded hole of the pressing mold.

6. The device according to claim 1, wherein The upper die dimensional pressing block (6) is a special-shaped block, the upper part of which is a plane, the lower part of which is an inwardly concave surface and matches the upper model surface of the propeller root beam, and the tail part is provided with a mounting positioning hole corresponding to the propeller root circular sleeve, and the bottom of the upper die dimensional pressing block (6) is provided with a positioning boss, which matches the die glue flow groove for limiting.

7. The device according to claim 1, wherein The pressure plate (7) is a square block with circular arcs at the four corners and a mounting hole in the middle. It is stacked with the upper mold dimensional pressure block (6) and is tightened with the pressure bolt (5).

8. The device according to claim 1, wherein The bow clamp (8) is composed of a bow frame and a screw, and is used to pressurize and clamp the two side surfaces of the upper die dimensional pressing block (6).

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

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