Gluing and assembling device for gasket at root of C-shaped blade

Abstract

The invention provides a gluing assembly device for a gasket at the root of a C-shaped blade. The gluing assembly device comprises an upper template 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 stripper screw 8; a spring 9; a wedge 10; the C-shaped movable handle compresses the screw 11; a nut 12; an enlarged gasket 13; a hexagon nut 14 with a shoulder; an anti-rotation pin 15; the upper template 1 and the lower template 2 are mounted on the outer end surface of a hole position of a metal lining of the paddle root of the C-shaped paddle; the upper template 1 and the lower template 2 are mounted on the outer end surface of the hole position of the metal lining of the paddle root of the C-shaped paddle; the upper template 1 and the lower template 2 are provided with hole sites corresponding to the positions of the paddle root bushings, and the reference positioning pin 3 and the positioning pin 4 are inserted into the hole sites; the reference positioning pin 3 and the positioning pin 4 are similar in structure and are sequentially provided with a knurling section, a limiting step section, a first clamp positioning section, a lining positioning section, a second clamp positioning section, a thread fastening section and a limiting step section from top to bottom.

Description

Technical Field

[0001] The invention is used in the field of composite blade manufacturing, and in particular relates to a C-shaped blade root gasket gluing and assembling device. Background Art

[0002] As the core component of the helicopter rotor system, most blades adopt a relatively advanced all-composite structure, among which the blade root and the hub have high assembly requirements. At present, there is a C-shaped blade root structure, in which composite washers are glued to the outside of the blade root bushing. After assembly, the overall height h and the single-side thickness h1 have high dimensional accuracy requirements, and after gluing, the upper and lower surfaces of the composite washers are required to have high verticality requirements with the metal bushing holes at the blade root. Because the machining of the composite washers will cause defects such as delamination, the gluing size and verticality of the above-mentioned composite washers need to be guaranteed once through gluing and curing, and the traditional direct gluing method based on experience cannot guarantee the stable quality of each batch. The present invention is used to solve the problem of high assembly requirements for the inner and outer composite washers at the metal bushing of the C-shaped blade root. Summary of the invention

[0003] The present application provides a C-shaped blade root gasket adhesive assembly device, which is used to solve the problem of high assembly requirements of the outer composite gasket at the metal bushing at the root of the C-shaped blade.

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

[0005] An upper template 1 and a lower template 2 are installed on the outer end surface of the hole of the metal bushing at the root of the C-shaped blade; holes corresponding to the positions of the bushing at the root of the blade are arranged on the upper template 1 and the lower template 2, and reference positioning pins 3 and positioning pins 4 are inserted in the holes;

[0006] The reference locating pin 3 and the locating pin 4 have similar structures, and from top to bottom, they have a knurling section, a limit platform stage, a first fixture locating section, a bushing locating section, a second fixture locating section, and a threaded fastening section. The limit platform stage, the first fixture locating section, the bushing locating section, the second fixture locating section, and the threaded fastening section have gradually smaller diameters. The bushing locating section of the reference locating pin 3 and the locating pin 4 is the locating axis surface only in the area in contact with the metal bushing hole at the root of the blade, and the middle area is a clearance area with a diameter of 1 mm smaller.

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

[0008] The first thickness limiting block 5 is installed at both ends of the upper template 1 and the lower template 2, and the first thickness limiting block 5 is fastened to the upper template 1 by the hexagon socket screw 17;

[0009] The second thickness limiting block 6 is formed with two stepped through holes, the middle part is a small hole, and the upper and lower parts are countersunk holes;

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

[0011] 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;

[0012] A threaded hole is formed in the middle of the first thickness limiting block 5, which is threadedly connected with the C-shaped movable handle clamping screw 11, that is, the C-shaped 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 cooperates with the inclined wedge 10, and the inclined wedge 10 is adjusted in and out by a C-shaped movable handle clamping screw 11, and 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 a nut 12;

[0014] A convex through groove is arranged in the middle of one side of the big head of the inclined wedge 10, and the small end of the convex through groove is open, and 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 big end of the convex through groove of the inclined wedge 10.

[0015] Specifically, the verticality between the positioning holes of the upper template 1 and the lower template 2 and the contact surface of the composite gasket is required to be 0.02;

[0016] Specifically, the height dimension H of the first thickness limiting block 5 is controlled at 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 bushing positioning section of the reference positioning pin 3 and the metal bushing hole position of the C-shaped blade root are matched with H7 / h6;

[0019] Specifically, the locating pin 4 is positioned by the bushing and matches the hole position of the metal bushing at the root of the C-shaped blade with H7 / f6;

[0020] Specifically, the first fixture positioning section of the reference positioning pin 3 and the hole position of the upper template 1 adopt H7 / h6 matching; the second fixture positioning section of the reference positioning pin 3 and the hole position of the lower template 2 adopt H7 / f 6 matching,

[0021] Specifically, the first fixture positioning section of the locating pin 4 and the hole position of the upper template 1 are matched with H9 / f8, and the second fixture positioning section of the locating pin 4 and the hole position of the lower template 2 are matched with H9 / f 8.

[0022] In summary, the present application provides a C-shaped blade root gasket gluing assembly device, which uses the blade root metal bushing as the positioning reference, and coordinates multiple sets of limit structures to meet the overall height and single-side thickness requirements of the composite gasket after gluing. Mechanical methods such as wedges and screw connections, combined with plug gauge measurement, further ensure the geometric tolerance and dimensional tolerance requirements of the C-shaped blade root gasket gluing assembly. The auxiliary device for gluing and curing the outer composite gasket at the metal bushing of the C-shaped blade root ensures the high assembly requirements of the composite gasket at the blade root. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0025] Figure 3 A schematic diagram of a cross-sectional view of a device at a bushing hole at the root of a blade in a C-shaped blade root gasket adhesive assembly device provided by the present application;

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

[0027] Figure 5 A schematic diagram of a C-shaped blade root gasket adhesive assembly device provided in the present application, showing an axial lateral view;

[0028] Among them: upper template 1; lower template 2; reference positioning pin 3; positioning pin 4; first thickness limit block 5; second thickness limit block 6; pressure plate 7; unloading screw 8; spring 9; inclined wedge 10; C-type movable handle clamping screw 11; nut 12; enlarged washer 13; shouldered hexagonal nut 14; anti-rotation pin 15; shouldered hexagonal nut 16; hexagon socket screw 17. DETAILED DESCRIPTION

[0029] Embodiment 1

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

[0031] An upper template 1 and a lower template 2 are installed on the outer end surface of the hole of the metal bushing at the root of the C-shaped blade; holes corresponding to the positions of the bushing at the root of the blade are arranged on the upper template 1 and the lower template 2, and reference positioning pins 3 and positioning pins 4 are inserted in the holes;

[0032] The reference locating pin 3 and the locating pin 4 have similar structures, and from top to bottom, they have a knurling section, a limit platform stage, a first fixture locating section, a bushing locating section, a second fixture locating section, and a threaded fastening section. The limit platform stage, the first fixture locating section, the bushing locating section, the second fixture locating section, and the threaded fastening section have gradually smaller diameters. The bushing locating section of the reference locating pin 3 and the locating pin 4 is the locating axis surface only in the area in contact with the metal bushing hole at the root of the blade, and the middle area is a clearance area with a diameter of 1 mm smaller.

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

[0034] The first thickness limiting block 5 is installed at both ends of the upper template 1 and the lower template 2, and the first thickness limiting block 5 is fastened to the upper template 1 by the hexagon socket screw 17;

[0035] The second thickness limiting block 6 is formed with two stepped through holes, the middle part is a small hole, and the upper and lower parts are countersunk holes;

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

[0037] 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;

[0038] A threaded hole is formed in the middle of the first thickness limiting block 5, which is threadedly connected with the C-shaped movable handle clamping screw 11, that is, the C-shaped 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 cooperates with the inclined wedge 10, and the inclined wedge 10 is adjusted in and out by a C-shaped movable handle clamping screw 11, and 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 a nut 12;

[0040] A convex through groove is arranged in the middle of one side of the big head of the inclined wedge 10, and the small end of the convex through groove is open, and 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 big end of the convex through groove of the inclined wedge 10.

[0041] Specifically, the verticality between the positioning holes of the upper template 1 and the lower template 2 and the contact surface of the composite gasket is required to be 0.02;

[0042] Specifically, the height dimension H of the first thickness limiting block 5 is controlled at 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 bushing positioning section of the reference positioning pin 3 and the metal bushing hole position of the C-shaped blade root are matched with H7 / h6;

[0045] Specifically, the locating pin 4 is positioned by the bushing and matches the hole position of the metal bushing at the root of the C-shaped blade with H7 / f6;

[0046] Specifically, the first fixture positioning section of the reference positioning pin 3 and the hole position of the upper template 1 adopt H7 / h6 matching; the second fixture positioning section of the reference positioning pin 3 and the hole position of the lower template 2 adopt H7 / f 6 matching,

[0047] Specifically, the first fixture positioning section of the locating pin 4 and the hole position of the upper template 1 are matched with H9 / f8, and the second fixture positioning section of the locating pin 4 and the hole position of the lower template 2 are matched with H9 / f 8.

[0048] In summary, the present application provides a C-shaped blade root gasket gluing assembly device, which uses the blade root metal bushing as the positioning reference, and coordinates multiple sets of limit structures to meet the overall height and single-side thickness requirements of the composite gasket after gluing. Mechanical methods such as wedges and screw connections, combined with plug gauge measurement, further ensure the geometric tolerance and dimensional tolerance requirements of the C-shaped blade root gasket gluing assembly. The auxiliary device for gluing and curing the outer composite gasket at the metal bushing of the C-shaped blade root ensures the high assembly requirements of the composite gasket at the blade root.

[0049] Embodiment 2

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

[0051] Step 1: The first thickness limiting block 5 is fastened to the upper template 1 by means of the hexagon socket 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-shaped 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 C-shaped blade root, the hole position of the upper template 1 is coordinated with the position of the metal bushing of the C-shaped blade root, the reference positioning pin 3 and the positioning pin 4 are sequentially passed through the hole position of the upper template 1, the composite gasket, the upper bushing of the C-shaped blade root, the composite gasket, the hole position of the upper pressure plate 7, the hole position of the lower pressure plate 7, the composite gasket, the lower bushing of the C-shaped blade root, the composite gasket, the hole position of the lower template 2, and then connected through the enlarged gasket 13 and the shouldered hexagonal nut 14;

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

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

[0057] Step 7: Apply glue on the contact surface between the composite gasket and the upper bushing at the root of the C-shaped blade;

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

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

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

[0061] Step 11: After curing is completed, loosen the shouldered hexagonal nut 14 and disassemble them one by one to complete the gluing assembly of the composite gasket at the root of the C-shaped blade.

Claims

1. A C-shaped blade root gasket gluing assembly device, characterized in that: The invention comprises 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), an inclined wedge (10), a C-shaped movable handle clamping screw (11), a nut (12), an enlarged washer (13), a shouldered hexagonal nut (14), an anti-rotation pin (15), a shouldered hexagonal nut (16) and a hexagon socket screw (17), wherein: An upper template (1) and a lower template (2) are installed on the outer end surface of the hole of the metal bushing at the root of the C-shaped blade; holes corresponding to the positions of the bushing at the root of the blade are arranged on the upper template (1) and the lower template (2), and reference positioning pins (3) and positioning pins (4) are inserted into the holes; The reference positioning pin (3) and the positioning pin (4) have similar structures, and have a knurling section, a limit platform stage, a first clamp positioning section, a bushing positioning section, a second clamp positioning section, and a threaded fastening section from top to bottom. The limit platform stage, the first clamp positioning section, the bushing positioning section, the second clamp positioning section, and the threaded fastening section have gradually smaller diameters. The bushing positioning section of the reference positioning pin (3) and the positioning pin (4) is a positioning shaft surface only in the area in contact with the metal bushing hole at the root of the blade, and the middle area is a clearance area. The knurled sections on the reference positioning pin (3) and the positioning pin (4) are provided with radial through holes, and the anti-rotation pin (15) passes through the holes. The anti-rotation pin (15) is composed of a knurled section, a positioning section and a threaded end, and a shouldered hexagonal nut (16) is connected to the threaded end of the anti-rotation pin (15); A first thickness limiting block (5) is installed at both ends of the upper template (1) and the lower template (2), and the first thickness limiting block (5) is fastened to the upper template (1) by means of a hexagon socket screw (17); The second thickness limiting block (6) is formed with two stepped through holes, the middle part is a small hole, and the upper and lower parts are countersunk holes; The pressure plate (7) is strip-shaped, with a reference positioning pin (3) and a through hole for the positioning pin (4) in the middle, and long conical surfaces on both ends of one side, which cooperate with the conical surface of the inclined wedge (10), and countersunk threaded holes (4) are provided 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 a 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 formed in the middle of the first thickness limiting block (5) and is threadedly connected to the C-shaped movable handle clamping screw (11), that is, the C-shaped 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) cooperates with the inclined wedge (10), and the inclined wedge (10) is adjusted in and out by a C-shaped movable handle clamping screw (11). The C-shaped movable handle clamping screw (11) is connected through a threaded hole in the middle of the first thickness limiting block (5) and is locked by a nut (12); A convex through groove is arranged in the middle of one side of the big head of the inclined wedge (10), the small end of the convex through groove is open, and 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 big end of the convex through groove of the inclined wedge (10).

2. The C-shaped blade root gasket gluing assembly device according to claim 1, characterized in that: The verticality requirement between the positioning holes of the upper template (1) and the lower template (2) and the contact surface of the composite gasket is 0.0 (2).

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

025.

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

075.

5. The C-shaped blade root gasket gluing assembly device according to claim 1, characterized in that: The bushing positioning section of the reference positioning pin (3) and the hole position of the metal bushing at the root of the C-shaped blade are matched with each other in the H7 / h6 manner.

6. The C-shaped blade root gasket gluing assembly device according to claim 1, characterized in that: The positioning pin (4) is positioned by the bushing and matches the hole position of the metal bushing at the root of the C-shaped blade with H7 / f6.

7. The C-shaped blade root gasket gluing assembly device according to claim 1, characterized in that: The first fixture positioning section of the reference positioning pin (3) and the hole position of the upper template (1) adopt H7 / h6 matching; the second fixture positioning section of the reference positioning pin (3) and the hole position of the lower template (2) adopt H7 / h6 matching.

8. The C-shaped blade root gasket gluing assembly device according to claim 1, characterized in that: The first fixture positioning section of the positioning pin (4) and the hole position of the upper template (1) are matched in H9 / f8, and the second fixture positioning section of the positioning pin (4) and the hole position of the lower template (2) are matched in H9 / f8.

Images