A C-shaped paddle root gasket gluing assembly device

Abstract

The application provides a C-shaped paddle root gasket gluing and assembling device, which comprises an upper die plate 1, a lower die plate 2, a reference positioning pin 3, a positioning pin 4, a first thickness limiting block 5, a second thickness limiting block 6, a pressing plate 7, a discharging screw 8, a spring 9, a wedge 10, a C-shaped movable handle pressing screw 11, a nut 12, an enlarged gasket 13, a shoulder hexagonal nut 14, an anti-rotation pin 15, a shoulder hexagonal nut 16 and an inner hexagonal screw 17, wherein: the outer end surface of the C-shaped paddle root metal bushing hole position is provided with the upper die plate 1 and the lower die plate 2; the upper die plate 1 and the lower die plate 2 are provided with hole positions corresponding to the paddle root bushing, the hole positions are provided with the reference positioning pin 3 and the positioning pin 4, the reference positioning pin 3 and the positioning pin 4 are similar in structure and sequentially have a knurled section, a limiting platform section, a first clamp positioning section, a bushing positioning section, a second clamp positioning section and a threaded fastening section from top to bottom.

Description

Technical Field

[0001] This invention relates to the field of composite blade manufacturing, specifically to a C-shaped blade root gasket adhesive assembly device. Background Technology

[0002] As a core component of helicopter rotor systems, rotor blades mostly employ advanced all-composite material structures, with high assembly requirements at the blade root and rotor hub. Currently, there is a C-shaped rotor blade root structure where composite gaskets are glued to the outer side of the root bushing. After assembly, the overall height h and single-sided thickness h1 have high dimensional accuracy requirements, and the top and bottom surfaces of the composite gaskets must maintain a high degree of perpendicularity to the holes in the metal bushing at the blade root. Because machining composite gaskets can lead to defects such as delamination, the dimensions and perpendicularity of the aforementioned composite gaskets must be guaranteed through a single adhesive curing process. Traditional, experience-based direct adhesive bonding methods cannot guarantee consistent quality across batches. This invention addresses the high assembly requirements of the composite gaskets on the inner and outer sides of the metal bushing at the C-shaped rotor blade root. Summary of the Invention

[0003] This application provides a C-shaped blade root gasket adhesive assembly device to solve the problem of high assembly requirements for the composite gasket on the outer side of the metal bushing at the blade root of a C-shaped blade.

[0004] Technical Solution: This application provides a C-shaped blade root washer adhesive assembly device, including an upper template 1; a lower template 2; a reference positioning pin 3; a positioning pin 4; a first thickness limiting block 5; a second thickness limiting block 6; a pressure plate 7; a discharge screw 8; a spring 9; a wedge 10; a C-shaped movable handle clamping screw 11; a nut 12; an enlarged washer 13; a first shouldered hexagonal nut 14; an anti-rotation pin 15; a second shouldered hexagonal nut 16; and an internal hexagonal screw 17, wherein:

[0005] The outer end face of the hole of the C-shaped blade root metal bushing is equipped with an upper template 1 and a lower template 2; the upper template 1 and the lower template 2 are provided with holes corresponding to the positions of the blade root bushing, and reference positioning pins 3 and positioning pins 4 are inserted in the holes.

[0006] The reference positioning pins 3 and 4 have similar structures. From top to bottom, they have a knurled section, a limiting stage, a first clamp positioning section, a bushing positioning section, a second clamp positioning section, and a threaded fastening section. The diameter of the limiting stage, the first clamp positioning section, the bushing positioning section, the second clamp positioning section, and the threaded fastening section gradually decreases. The bushing positioning section of the reference positioning pins 3 and 4 is only a positioning shaft surface in the area in contact with the metal bushing hole of the blade root, while the middle area is a clearance area with a diameter of less than 1 mm.

[0007] The knurled sections of the reference positioning pins 3 and 4 have radial through holes, through which the anti-rotation pin 15 passes. The anti-rotation pin 15 consists of a knurled section, a positioning section, and a threaded end. The second shouldered hexagonal nut 16 is connected to the threaded end of the anti-rotation pin 15.

[0008] First thickness limiting blocks 5 are installed at both ends of the upper template 1 and the lower template 2. The first thickness limiting blocks 5 are fastened to the upper template 1 by internal hex screws 17.

[0009] The second thickness block 6 has two stepped through holes, with a small hole in the middle and countersunk holes at the top and bottom.

[0010] The pressure plate 7 is strip-shaped, with a through hole for the reference positioning pin 3 and positioning pin 4 in the middle, and long conical surfaces on both ends of one side. The long conical surfaces mate with the conical surfaces of the wedge 10. There are 4 countersunk threaded holes at both ends of the pressure plate 7.

[0011] The unloading screw 8 is sequentially screwed through the stepped through hole of the second thickness limiting block 6, the spring 9 and the countersunk threaded hole of the pressure plate 7, wherein the spring 9 is placed in the cavity formed by the large hole of the stepped through hole of the second thickness limiting block 6 and the large hole of the countersunk threaded hole of the pressure plate 7.

[0012] A threaded hole is made in the middle of the first thickness limiting block 5, which is threaded to the C-type movable handle clamping screw 11. That is, the C-type movable handle clamping screw 11 passes through the nut 12 and the threaded hole of the first thickness limiting block 5 in sequence.

[0013] The long conical surface of the pressure plate 7 is engaged with the inclined wedge 10. The inclined wedge 10 is adjusted to move in and out by the C-shaped movable handle clamping screw 11. The C-shaped movable handle clamping screw 11 is connected through the threaded hole in the middle of the first thickness limiting block 5 and is locked by the nut 12.

[0014] A U-shaped through groove is provided in the middle of one side of the large end of the wedge 10. The small end of the U-shaped through groove is open. The threaded protrusion at the front end of the C-shaped movable handle clamping screw 11 is placed in the through groove area of ​​the large end of the U-shaped through groove of the wedge 10.

[0015] Specifically, the perpendicularity requirement between the positioning holes of the upper template 1 and the lower template 2 and the contact surface of the composite gasket is 0.02.

[0016] Specifically, the height dimension H of the first thickness limiting block 5 is controlled within h (-0.075 to -0.025).

[0017] Specifically, the thickness dimension H1 of the second thickness limiting block 6 is controlled within h1 (-0.025 to -0.075).

[0018] Specifically, the positioning section of the reference positioning pin 3 bushing and the hole position of the C-shaped blade root metal bushing adopt H7 / h6 fit;

[0019] Specifically, the positioning pin 4 bushing positioning section and the C-shaped blade root metal bushing hole adopt H7 / f6 fit;

[0020] Specifically, the first clamping section of the reference positioning pin 3 and the hole in the upper template 1 are fitted with an H7 / h6 fit; the second clamping section of the reference positioning pin 3 and the hole in the lower template 2 are fitted with an H7 / f6 fit.

[0021] Specifically, the first clamping section of the positioning pin 4 and the hole of the upper template 1 are fitted with H9 / f8, and the second clamping section of the positioning pin 4 and the hole of the lower template 2 are fitted with H9 / f8.

[0022] In summary, this application provides a C-shaped blade root gasket adhesive assembly device. Using the blade root metal bushing as a positioning reference, multiple sets of limiting structures are coordinated to meet the overall height and single-sided thickness requirements after the composite gasket is glued. Mechanical methods such as wedges and screw connections, combined with plug gauge measurements, further ensure the form and position tolerances and dimensional tolerances of the C-shaped blade root gasket adhesive assembly. An auxiliary device for the adhesive curing of the composite gasket on the outer side of the C-shaped blade root metal bushing ensures the high assembly requirements of the blade root composite gasket. Attached Figure Description

[0023] Figure 1 A schematic diagram of the exploded view of the root of the C-shaped blade is provided for this application;

[0024] Figure 2 A schematic diagram of a cross-sectional view at the blade root bushing hole provided in this application;

[0025] Figure 3 A schematic diagram of the cross-sectional view of the device at the blade root bushing hole position in a C-shaped blade root washer adhesive assembly device provided in this application.

[0026] Figure 4 A partially enlarged schematic diagram of the connection between the wedge and the clamping screw of the movable handle in a C-shaped blade root washer adhesive assembly device provided in this application;

[0027] Figure 5 A schematic diagram of an axial side view of a C-shaped blade root washer adhesive assembly device provided in this application;

[0028] The components are: upper template 1; lower template 2; reference positioning pin 3; positioning pin 4; first thickness limiting block 5; second thickness limiting block 6; pressure plate 7; unloading screw 8; spring 9; wedge 10; C-type movable handle clamping screw 11; nut 12; enlarged washer 13; first shouldered hexagonal nut 14; anti-rotation pin 15; second shouldered hexagonal nut 16; internal hexagonal screw 17. Detailed Implementation

[0029] Example 1

[0030] like Figure 1-5As shown, this application provides a C-shaped blade root washer adhesive assembly device, including an upper template 1; a lower template 2; a reference positioning pin 3; a positioning pin 4; a first thickness limiting block 5; a second thickness limiting block 6; a pressure plate 7; a discharge screw 8; a spring 9; a wedge 10; a C-shaped movable handle clamping screw 11; a nut 12; an enlarged washer 13; a first shouldered hexagonal nut 14; an anti-rotation pin 15; a second shouldered hexagonal nut 16; and an internal hexagonal screw 17, wherein:

[0031] The outer end face of the hole of the C-shaped blade root metal bushing is equipped with an upper template 1 and a lower template 2; the upper template 1 and the lower template 2 are provided with holes corresponding to the positions of the blade root bushing, and reference positioning pins 3 and positioning pins 4 are inserted in the holes.

[0032] The reference positioning pins 3 and 4 have similar structures. From top to bottom, they have a knurled section, a limiting platform stage, a first clamp positioning section, a bushing positioning section, a second clamp positioning section, and a threaded fastening section. The diameters of the limiting platform stage, the first clamp positioning section, the bushing positioning section, the second clamp positioning section, and the threaded fastening section gradually decrease. The bushing positioning section of the reference positioning pins 3 and 4 is only a positioning shaft surface in the area in contact with the metal bushing hole of the blade root, while the middle area is a clearance area with a diameter of less than 1 mm.

[0033] The knurled sections of the reference positioning pins 3 and 4 have radial through holes, through which the anti-rotation pin 15 passes. The anti-rotation pin 15 consists of a knurled section, a positioning section, and a threaded end. The second shouldered hexagonal nut 16 is connected to the threaded end of the anti-rotation pin 15.

[0034] First thickness limiting blocks 5 are installed at both ends of the upper template 1 and the lower template 2. The first thickness limiting blocks 5 are fastened to the upper template 1 by internal hex screws 17.

[0035] The second thickness block 6 has two stepped through holes, with a small hole in the middle and countersunk holes at the top and bottom.

[0036] The pressure plate 7 is strip-shaped, with a through hole for the reference positioning pin 3 and positioning pin 4 in the middle, and long conical surfaces on both ends of one side. The long conical surfaces mate with the conical surfaces of the wedge 10. There are 4 countersunk threaded holes at both ends of the pressure plate 7.

[0037] The unloading screw 8 is sequentially screwed through the stepped through hole of the second thickness limiting block 6, the spring 9 and the countersunk threaded hole of the pressure plate 7, wherein the spring 9 is placed in the cavity formed by the large hole of the stepped through hole of the second thickness limiting block 6 and the large hole of the countersunk threaded hole of the pressure plate 7.

[0038] A threaded hole is made in the middle of the first thickness limiting block 5, which is threaded to the C-type movable handle clamping screw 11. That is, the C-type movable handle clamping screw 11 passes through the nut 12 and the threaded hole of the first thickness limiting block 5 in sequence.

[0039] The long conical surface of the pressure plate 7 is engaged with the inclined wedge 10. The inclined wedge 10 is adjusted to move in and out by the C-shaped movable handle clamping screw 11. The C-shaped movable handle clamping screw 11 is connected through the threaded hole in the middle of the first thickness limiting block 5 and is locked by the nut 12.

[0040] A U-shaped through groove is provided in the middle of one side of the large end of the wedge 10. The small end of the U-shaped through groove is open. The threaded protrusion at the front end of the C-shaped movable handle clamping screw 11 is placed in the through groove area of ​​the large end of the U-shaped through groove of the wedge 10.

[0041] Specifically, the perpendicularity requirement between the positioning holes of the upper template 1 and the lower template 2 and the contact surface of the composite gasket is 0.02.

[0042] Specifically, the height dimension H of the first thickness limiting block 5 is controlled within h (-0.075 to -0.025).

[0043] Specifically, the thickness dimension H1 of the second thickness limiting block 6 is controlled within h1 (-0.025 to -0.075).

[0044] Specifically, the positioning section of the reference positioning pin 3 bushing and the hole position of the C-shaped blade root metal bushing adopt H7 / h6 fit;

[0045] Specifically, the positioning pin 4 bushing positioning section and the C-shaped blade root metal bushing hole adopt H7 / f6 fit;

[0046] Specifically, the first clamping section of the reference positioning pin 3 and the hole in the upper template 1 are fitted with an H7 / h6 fit; the second clamping section of the reference positioning pin 3 and the hole in the lower template 2 are fitted with an H7 / f6 fit.

[0047] Specifically, the first clamping section of the positioning pin 4 and the hole of the upper template 1 are fitted with H9 / f8, and the second clamping section of the positioning pin 4 and the hole of the lower template 2 are fitted with H9 / f8.

[0048] In summary, this application provides a C-shaped blade root gasket adhesive assembly device. Using the blade root metal bushing as a positioning reference, multiple sets of limiting structures are coordinated to meet the overall height and single-sided thickness requirements after the composite gasket is glued. Mechanical methods such as wedges and screw connections, combined with plug gauge measurements, further ensure the form and position tolerances and dimensional tolerances of the C-shaped blade root gasket adhesive assembly. An auxiliary device for the adhesive curing of the composite gasket on the outer side of the C-shaped blade root metal bushing ensures the high assembly requirements of the blade root composite gasket.

[0049] Example 2

[0050] This application provides a method for using a C-shaped blade root washer adhesive assembly device, the method comprising:

[0051] Step 1: The first thickness limiting block 5 is fastened to the upper template 1 by the internal hex screw 17;

[0052] Step 2: The unloading screw 8 is screwed through the stepped through hole of the second thickness limiting block 6, the spring 9, and the countersunk threaded hole of the pressure plate 7 in sequence;

[0053] Step 3: The C-type movable handle clamping screw 11 passes through the nut 12 and the threaded hole of the first thickness limiting block 5 in sequence;

[0054] Step 4: The upper template 1 is placed on the root of the C-shaped blade. The holes of the upper template 1 are coordinated with the positions of the metal bushings of the C-shaped blade root. The reference positioning pins 3 and 4 pass through the holes of the upper template 1, the composite washer, the upper bushing of the C-shaped blade root, the composite washer, the holes of the upper pressure plate 7, the holes of the lower pressure plate 7, the composite washer, the lower bushing of the C-shaped blade root, the composite washer, and the holes of the lower template 2 in sequence. Then, they are connected by the enlarged washer 13 and the first shouldered hexagonal nut 14.

[0055] Step 5: The anti-rotation pin 15 passes through the knurled section hole of the reference positioning pin 3 and the positioning pin 4, and the second shouldered hexagonal nut 16 is locked to prevent the reference positioning pin 3 and the positioning pin 4 from rotating when the first shouldered hexagonal nut 14 is turned.

[0056] Step 6: Install the wedge 10 between the upper pressure plate 7 and the lower pressure plate 7;

[0057] Step 7: Apply adhesive to the contact surface between the composite washer and the upper bushing of the C-shaped blade root;

[0058] Step 8: Secure the upper template 1, lower template 2, reference positioning pin 3, positioning pin 4 and the first thickness limiting block 5 with the first shoulder hexagonal nut 14;

[0059] Step 9: Tighten the C-shaped movable handle clamping screw again, push the wedge 10 forward and press the pressure plate 7 firmly;

[0060] Step 10: When the gap between the second thickness limit block 6 and the pressure plate 7 is less than 0.02 by measuring with a plug gauge, complete the locking of the outer composite gasket at the metal bushing of the C-shaped blade root, and cure at room temperature for 24 hours.

[0061] Step 11: After curing, loosen the first shoulder hexagonal nut 14, disassemble in sequence, and complete the adhesive assembly of the composite washer at the root of the C-shaped propeller.

Claims

1. A C-shaped blade root washer adhesive assembly device, characterized in that, The components include an upper template (1), a lower template (2), a reference positioning pin (3), a positioning pin (4), a first thickness limiting block (5), a second thickness limiting block (6), a pressure plate (7), a discharge screw (8), a spring (9), a wedge (10), a C-type movable handle clamping screw (11), a nut (12), an enlarged washer (13), a first shouldered hexagonal nut (14), an anti-rotation pin (15), a second shouldered hexagonal nut (16), and an internal hexagonal screw (17), wherein: The upper template (1) and lower template (2) are installed on the outer end face of the hole of the C-shaped blade root metal bushing; the upper template (1) and lower template (2) are provided with holes corresponding to the blade root bushing, and reference positioning pins (3) and positioning pins (4) are inserted in the holes. The reference positioning pin (3) and positioning pin (4) have similar structures. From top to bottom, they have a knurled section, a limiting stage, a first clamp positioning section, a bushing positioning section, a second clamp positioning section, and a threaded fastening section. The diameters of the limiting stage, the first clamp positioning section, the bushing positioning section, the second clamp positioning section, and the threaded fastening section gradually decrease. The bushing positioning section of the reference positioning pin (3) and positioning pin (4) is only a positioning shaft surface in the area in contact with the metal bushing hole of the blade root, while the middle area is a clearance area. The knurled sections of the reference positioning pin (3) and positioning pin (4) have radial through holes, and the anti-rotation pin (15) passes through the holes. The anti-rotation pin (15) consists of a knurled section, a positioning section and a threaded end. The second shouldered hexagonal nut (16) is connected to the threaded end of the anti-rotation pin (15). First thickness limiting blocks (5) are installed at both ends of the upper template (1) and the lower template (2). The first thickness limiting blocks (5) are fastened to the upper template (1) by internal hexagon screws (17). The second thickness block (6) is made with two stepped through holes, with a small hole in the middle and countersunk holes at the top and bottom. The pressure plate (7) is strip-shaped, with a reference positioning pin (3) and a positioning pin (4) through hole in the middle. There are long conical surfaces on both ends of one side, which are matched with the conical surface of the wedge (10). There are 4 countersunk threaded holes at both ends of the pressure plate (7). The unloading screw (8) is screwed through the stepped through hole of the second thickness limiting block (6), the spring (9) and the countersunk threaded hole of the pressure plate (7) in sequence, wherein the spring (9) is placed in the cavity formed by the large hole of the stepped through hole of the second thickness limiting block (6) and the large hole of the countersunk threaded hole of the pressure plate (7); A threaded hole is made in the middle of the first thickness limiting block (5) and threadedly connected to the C-type movable handle clamping screw (11). That is, the C-type movable handle clamping screw (11) passes through the nut (12) and the threaded hole of the first thickness limiting block (5) in sequence. The long conical surface of the pressure plate (7) is matched with the wedge (10). The wedge (10) is adjusted to move in and out by the C-type movable handle clamping screw (11). The C-type movable handle clamping screw (11) is connected through the threaded hole in the middle of the first thickness limiting block (5) and locked by the nut (12). A U-shaped through groove is provided in the middle of the large end of the wedge (10), and the small end of the U-shaped through groove is open. The threaded protrusion at the front end of the C-shaped movable handle clamping screw (11) is placed in the through groove area of ​​the large end of the U-shaped through groove of the wedge (10).

2. The C-shaped blade root washer adhesive assembly device according to claim 1, characterized in that, The perpendicularity requirement between the positioning holes of the upper template (1) and the contact surface of the composite gasket is 0.

02.

3. The C-shaped blade root washer adhesive assembly device according to claim 1, characterized in that, The height dimension h of the first thickness block (5) ranges from -0.075 to -0.

025.

4. The C-shaped blade root washer adhesive assembly device according to claim 1, characterized in that, The thickness dimension h1 of the second thickness limit block (6) ranges from -0.025 to -0.

075.

5. The C-shaped blade root washer adhesive assembly device according to claim 1, characterized in that, The reference positioning pin (3) bushing positioning section and the C-shaped blade root metal bushing hole adopt H7 / h6 fit.

6. The C-shaped blade root washer adhesive assembly device according to claim 1, characterized in that, The positioning pin (4) bushing positioning section and the C-shaped blade root metal bushing hole adopt H7 / f6 fit.

7. The C-shaped blade root washer adhesive assembly device according to claim 1, characterized in that, The first fixture positioning section of the reference positioning pin (3) and the hole of the upper template (1) are fitted with H7 / h6; the second fixture positioning section of the reference positioning pin (3) and the hole of the lower template (2) are fitted with H7 / h6.

8. The C-shaped blade root washer adhesive assembly device according to claim 1, characterized in that, The positioning pin (4) first clamp positioning section and the upper template (1) hole position adopt H9 / f8 fit, and the positioning pin (4) second clamp positioning section and the lower template (2) hole position adopt H9 / f8 fit.

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