Tool suitable for interference mounting of pin shaft bush at curved surface part and assembling method

Abstract

The invention relates to the technical field of unfolding type wing part assembling, in particular to a tool suitable for curved surface part interference installation of a pin shaft bush and an assembling method.The tool comprises a base, a positioning column and a deviation rectifying pin, and a supporting face matched with a to-be-installed part is formed on the base; the positioning column is arranged on the base and used for being in clearance fit with the inner wall of a connecting ring of a to-be-installed part. The deviation rectifying pin is used for coaxially arranging the pin shaft bush in a to-be-installed hole of a to-be-installed part in a sleeving mode. The base is arranged to provide effective plane support for the wing main structure, and the degree of freedom of the wing main structure in the vertical and horizontal directions is preliminarily limited; the positioning column is in clearance fit with the inner wall of the connecting ring of the wing main structure, the degree of freedom of the wing main structure in the horizontal direction is further limited, and it is guaranteed that the wing main structure does not shake in the mounting and loading process. The pin shaft bushing is coaxially arranged in the to-be-mounted hole of the wing main structure in a sleeving manner through the deviation rectifying pin, so that the accuracy and precision of the mounting angle of the pin shaft bushing are improved.

Description

Technical Field

[0001] The present application relates to the technical field of the assembly of expandable wing components, and particularly relates to a tooling and an assembly method suitable for press-fitting a pin bushing at an interference fit on a curved surface part. Background Art

[0002] The wing locking mechanism is an important device for an expandable wing, generally used for locking the expanded wing to improve the stability of the mechanical connection of the wing and ensure the reliable connection between the wing and the fuselage.

[0003] The expandable wing locking mechanism device mainly consists of a locking pin, a pin bushing, a wing actuator, etc. The wing actuator detonates the pyrotechnic device according to the unlocking signal. Subsequently, the wing actuator pull rod drives the wing to rotate with the bearing. After the locking pin hits the semi-circular retaining boss of the pin bushing, it falls into the pin bushing. Under the combined limitation of the pulling force of the wing actuator pull rod and the retaining boss of the pin bushing, a reliable connection of the wing after expansion is achieved.

[0004] The pin bushing needs to withstand the impact force of the impact of the locking pin during the unlocking process. An interference connection is adopted between the pin bushing and the main wing structure to improve its anti-impact ability. Moreover, the flatness after installation and the accuracy of the guiding angle of the pin bushing will directly affect whether the wing can be smoothly expanded and a reliable connection can be established.

[0005] Since the pin bushing is designed with double grooves for applying structural adhesive to prevent it from rotating under vibration and impact loads, due to the limitation of the failure temperature of the structural adhesive, traditional hot-fitting and cold-fitting methods cannot be used. Moreover, the wing surface is an aluminum alloy curved surface structure. When using equipment such as a bench hammer to press-fit the pin bushing, effective planar support cannot be provided, and the installation angle of the pin bushing cannot be accurately positioned.

[0006] Chinese Patent No. CN 21828536 U discloses a bushing pressing device for a curved surface of an aircraft assembly tooling, which realizes interference fit by manually rotating a compression nut to replace the traditional manual knocking and pressing of the bushing. However, it adopts a three-point fixing method for the installation limiting method, which has relatively high requirements for the structural strength of the installed part (wing). Moreover, although the installation position is a curved surface, it requires strict symmetry at the bushing installation position, which is not applicable to the hollow aluminum alloy structure generally used for wings, and the fixing method is also not applicable to irregular curved surface structures. Therefore, when installing a pin bushing at an irregular curved surface part such as a wing, a special loading and supporting tooling needs to be designed. Summary of the Invention

[0007] The present application provides a tooling and an assembly method suitable for press-fitting a pin bushing at an interference fit on a curved surface part, so as to solve the problem that the installation angle of the pin bushing on the main structure of a curved surface wing cannot be accurately positioned in the prior art.

[0008] On the one hand, the present application provides a tooling for press-fitting a pin bushing at a curved surface part, including:

[0009] A base, formed with a support surface matching the part to be installed;

[0010] A positioning post, arranged on the base and used for clearance fit with the inner wall of the connecting ring of the part to be installed;

[0011] A deviation-correcting pin, used for coaxially sleeving the pin bushing in the hole to be installed of the part to be installed.

[0012] In a possible design, a cutting surface matching the outer wall of the connecting ring of the part to be installed is formed on the side wall of the deviation-correcting pin, and the cutting surface extends along the axial direction of the deviation-correcting pin.

[0013] In a possible design, the cutting surface is a non-cylindrical surface.

[0014] In a possible design, a first limiting part is formed on the end cap part of the pin bushing, a second limiting part is formed on the end part of the deviation-correcting pin, and the first limiting part and the second limiting part realize circumferential limitation through concave-convex cooperation.

[0015] In a possible design, the first limiting part is a semi-circular concave part, and the second limiting part is a semi-circular convex part.

[0016] In a possible design, it further includes a locking pressing block. A through hole is opened on the locking pressing block, a threaded groove is arranged at the upper end of the positioning post, and the locking pressing block is detachably installed at the upper end of the positioning post through a screw.

[0017] In a possible design, a bearing end plate is integrally formed at the upper end of the deviation-correcting pin.

[0018] On the other hand, the present application also provides an assembly method for the tooling for press-fitting a pin bushing at a curved surface part, adopting the tooling for press-fitting a pin bushing at a curved surface part as described above. The assembly method includes:

[0019] Put the connecting ring of the part to be installed onto the positioning post, and rotate the part to be installed circumferentially so that the surface of the part to be installed abuts and fits against the support surface of the base;

[0020] After trial-installing the deviation-correcting pin and the pin bushing, rotate the deviation-correcting pin circumferentially to rotate the deviation-correcting pin to a preset position;

[0021] Circumferentially limit the part to be installed on the outer wall of the positioning post;

[0022] Apply structural adhesive to the annular groove of the pin bushing;

[0023] After installing the deviation-correcting pin and the pin bushing again, apply a load along the axial direction of the deviation-correcting pin to make the outer wall of the pin bushing and the inner wall of the hole to be installed of the part to be installed in an interference fit.

[0024] The beneficial effects of the present application are as follows:

[0025] The tooling applicable to the interference fit installation of a pin bushing at a curved surface part of the present application has a base formed with a support surface matching the main wing structure, thereby providing effective planar support for the main wing structure and initially restricting the degrees of freedom of the main wing structure in the vertical and horizontal directions; by making the positioning post have a clearance fit with the inner wall of the connecting ring of the main wing structure, the degrees of freedom of the main wing structure in the horizontal direction are further restricted, ensuring that the main wing structure does not shake during the installation loading process. The pin bushing is coaxially sleeved in the hole to be installed on the main wing structure through the alignment pin, thereby improving the accuracy and precision of the installation angle of the pin bushing.

[0026] The assembly method of the tooling applicable to the interference fit installation of a pin bushing at a curved surface part provided by the present application, since it includes the tooling applicable to the interference fit installation of a pin bushing at a curved surface part in the present application, thus includes all the above advantages of the tooling applicable to the interference fit installation of a pin bushing at a curved surface part. Description of the Drawings

[0027] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of the tooling applicable to the interference fit installation of a pin bushing at a curved surface part provided by an embodiment of the present application;

[0029] Figure 2 It is a schematic diagram of the use state of the tooling applicable to the interference fit installation of a pin bushing at a curved surface part provided by an embodiment of the present application;

[0030] Figure 3 It is a schematic structural diagram of the alignment pin of the tooling applicable to the interference fit installation of a pin bushing at a curved surface part provided by an embodiment of the present application;

[0031] Figure 4 It is a schematic structural diagram of the pin bushing.

[0032] Reference Signs:

[0033] 100, base; 200, positioning post; 300, alignment pin; 310, cutting surface; 320, semi-circular convex part; 400, pin bushing; 410, semi-circular concave part; 420, annular groove; 500, connecting ring; 600, locking press block; 700, bearing end plate; 800, main wing structure. Specific Embodiments

[0034] The technical solutions of the present application will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0035] The following combines Figures 1 - 4 , and describes the tooling applicable to the interference installation of the pin bushing 400 at the curved surface part provided in the embodiments of the present application.

[0036] Referring to Figure 1 , Figure 2 As shown, a tooling applicable to the interference installation of the pin bushing 400 at the curved surface part provided in the embodiments of the present application is used to install the pin bushing 400 into the installation hole on the main wing structure 800. The tooling includes a base 100, a positioning post 200, and a deviation correction pin 300. The upper surface of the base 100 forms a support surface matching the part to be installed, where the part to be installed refers to the main wing structure 800. The positioning post 200 is integrally formed on the base 100, and the positioning post 200 is used for clearance fit with the inner wall of the connection ring 500 of the main wing structure 800. Among them, the outer wall of the connection ring 500 of the main wing structure 800 is a non-cylindrical surface. For example, it includes a semi-cylindrical surface and a transition surface. The deviation correction pin 300 is used to coaxially sleeve the pin bushing 400 into the to-be-installed hole of the part to be installed.

[0037] In some specific embodiments, a cutting surface 310 matching the outer wall of the connection ring 500 of the main wing structure 800 is formed on the side wall of the deviation correction pin 300, and the cutting surface 310 extends along the axial direction of the deviation correction pin 300. Specifically, the cutting surface 310 is a non-cylindrical surface, and the cutting surface 310 can match the position where the semi-cylindrical surface and the transition surface of the outer wall of the connection ring 500 are connected.

[0038] Referring to Figure 3 , Figure 4 As shown, in some specific embodiments of the present application, a first limiting part is formed at the end cap part of the pin bushing 400, and a second limiting part is formed at the lower end part of the deviation correction pin 300. The first limiting part and the second limiting part achieve circumferential limitation through concave-convex cooperation. Specifically, the first limiting part is a semi-circular concave part 410, and the second limiting part is a semi-circular convex part 320. The ends of the semi-circular concave part 410 and the semi-circular convex part 320 are designed with inclined surfaces. The semi-circular concave part 410 and the semi-circular convex part 320 can cooperate with each other to form a complete ring. In some specific embodiments, a pressure-bearing end plate 700 is integrally formed at the upper end of the deviation correction pin 300.

[0039] At the upper end of the positioning post 200, a locking pressure block 600 is also designed. A perforation is provided on the locking pressure block 600, and a threaded groove is provided at the upper end of the positioning post 200. The locking pressure block 600 is detachably installed at the upper end of the positioning post 200 through a screw.

[0040] By adopting the technical solution of the above embodiment, by making the base 100 form a supporting surface matching the main wing structure 800, an effective planar support is provided for the main wing structure 800, initially restricting the degrees of freedom of the main wing structure 800 in the vertical and horizontal directions; by making the positioning post 200 have a clearance fit with the inner wall of the connecting ring 500 of the main wing structure 800, the degrees of freedom of the main wing structure 800 in the horizontal direction are further restricted, ensuring that the main wing structure 800 does not shake during the installation and loading process. The pin bushing 400 is coaxially sleeved in the hole to be installed of the main wing structure 800 through the alignment pin 300, thereby improving the accuracy and precision of the installation angle of the pin bushing 400.

[0041] In the embodiment of the present application, an assembly method for a tooling suitable for press-fitting the pin bushing 400 at a curved surface part is also provided. By using the tooling suitable for press-fitting the pin bushing 400 in the above embodiment, the assembly method includes:

[0042] Slowly move the base 100 and the main wing structure 800 to the surface of the bench hammer worktable, and fix the base 100 and the bench hammer worktable surface with a bench vice or a fixture without relative displacement.

[0043] Measure that the interference amount is within the design range, count and check the tooling components for installing the pin bushing 400; clean the oil stain on the surface of the tooling with gauze and alcohol, and clean the hole to be installed of the wing pin bushing 400.

[0044] Slowly lift and support the main wing structure 800, sleeved the connecting ring 500 of the main wing structure 800 onto the positioning post 200, rotate the main wing structure 800 circumferentially, check the fitting condition of the lower end surface of the main wing structure 800 and the supporting surface of the base 100. A small amount of lubricant (molybdenum disulfide or light machine oil) can be applied during the installation process to make the surface of the main wing structure 800 abut and fit with the supporting surface of the base 100.

[0045] After trial-installing the alignment pin 300 and the pin bushing 400, make the bottom corner of the pin bushing 400 fall into the inner chamfer of the hole to be installed, lock the semi-circular convex part 320 at the lower end surface of the alignment pin 300 with the semi-circular concave part 410 at the upper end cap of the pin bushing 400, and slowly correct the alignment pin 300 circumferentially to make the cutting surface 310 of the alignment pin 300 closely fit with the outer wall of the connecting ring 500 of the main wing structure 800 (the position where the semi-cylindrical surface and the transition surface of the outer wall of the connecting ring 500 are connected). At this time, the pin bushing 400 and the hole to be installed are concentric and coaxial.

[0046] Remove the deviation correction pin 300 and the pin bushing 400, and circumferentially limit the main wing structure 800 to the outer wall of the positioning post 200. Specifically, install and lock the pressure plate with screws, and just tighten the screws slightly to avoid deformation of the main wing structure 800 of the aluminum alloy structure caused by too large pre-tightening force;

[0047] Then apply structural adhesive to the annular groove 420 of the pin bushing 400 and clean the excess overflowed structural adhesive;

[0048] Install the deviation correction pin 300 and the pin bushing 400 again, so that the bottom corner of the pin bushing 400 falls into the inner chamfer of the hole to be installed. Engage and lock the semi-circular convex part 320 at the lower end face of the deviation correction pin 300 with the semi-circular concave part 410 at the upper end cap of the pin bushing 400. Slowly correct the deviation of the deviation correction pin 300 circumferentially so that the cutting surface 310 of the deviation correction pin 300 is in close contact with the outer wall of the connection ring 500 of the main wing structure 800 (the position where the semi-cylindrical surface and the transition surface of the outer wall of the connection ring 500 are connected). At this time, after the pin bushing 400 is concentric and coaxial with the hole to be installed, apply a load along the axial direction of the deviation correction pin 300, operate the hydraulic hand pump to slowly pressurize, first gently tap the end of the deviation correction pin 300 and check to ensure that the shaft hole is coaxial, and then apply force section by section until the resistance suddenly increases and stop. Check and confirm that the end face of the pin bushing 400 is flush with the end face of the hole part, so that the outer wall of the pin bushing 400 and the inner wall of the hole to be installed on the main wing structure 800 are in interference fit;

[0049] After the curing time of the structural adhesive is completed, remove the locking pressure plate, support the main wing structure 800, remove it from the base 100, and clean the lubricant and structural adhesive on the main wing structure 800.

[0050] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0052] In this application, unless otherwise clearly defined or limited, terms such as "install", "connect", "link", "fix", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In this application, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0054] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A tool suitable for interference installation of pin bushings on curved surfaces, characterized in that: include: A base formed with a support surface matching the part to be mounted; A positioning column, arranged on the base, for being matched with the inner wall clearance of the connecting ring of the component to be installed; The deviation correcting pin is used to coaxially sleeve the pin shaft bushing in the installation hole of the installation part.

2. The tooling for interference-fitting a pin bushing on a curved surface according to claim 1, characterized in that: The side wall of the deviation correcting pin is formed with a cutting surface that matches the outer wall of the connecting ring of the component to be installed, and the cutting surface extends along the axial direction of the deviation correcting pin.

3. The tooling for interference-fitting a pin bushing on a curved surface according to claim 2 is characterized in that: The cutting surface is a non-cylindrical surface.

4. The tooling for interference-fitting a pin bushing on a curved surface according to claim 3 is characterized in that: The end cap portion of the pin shaft bushing is formed with a first limiting portion, and the end portion of the deviation correcting pin is formed with a second limiting portion, and the first limiting portion and the second limiting portion achieve circumferential limiting through concave-convex cooperation.

5. The tooling for interference-fitting a pin bushing on a curved surface according to claim 4 is characterized in that: The first limiting portion is a semi-annular concave portion, and the second limiting portion is a semi-annular convex portion.

6. The tooling for interference-fitting a pin bushing on a curved surface according to any one of claims 1 to 5, characterized in that: It also includes a locking block, which is provided with a through hole, and the upper end of the positioning column is provided with a threaded groove, and the locking block is detachably mounted on the upper end of the positioning column by means of screws.

7. The tooling for interference-fitting a pin bushing on a curved surface according to any one of claims 1 to 5, characterized in that: The upper end of the deviation-correcting pin is integrally formed with a pressure-bearing end plate.

8. An assembly method for a tooling for interference-fitting a pin bushing on a curved surface, characterized in that: The tooling for interference-installing a pin bushing on a curved surface according to any one of claims 1 to 7 is used, and the assembly method comprises: Sleeve the connecting ring of the component to be installed onto the positioning column, and rotate the component to be installed in the circumferential direction so that the surface of the component to be installed abuts against the supporting surface of the base; After the deviation-correcting pin and the pin shaft bushing are installed, the deviation-correcting pin is rotated circumferentially to rotate the deviation-correcting pin to a preset position; Limiting the to-be-installed part circumferentially to the outer wall of the positioning column; Applying structural adhesive to the annular groove of the pin bushing; After the deviation-correcting pin and the pin bushing are installed again, a load is applied along the axial direction of the deviation-correcting pin to make the outer wall of the pin bushing have an interference fit with the inner wall of the installation hole of the installation part.

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