Long truss positioning device

Abstract

The utility model belongs to the technical field of airplane composite part manufacturing, and discloses a stringer positioning device which comprises a wallboard forming tool and a positioning mechanism, the positioning mechanism comprises a plurality of positioning assemblies and a locking piece, each positioning assembly comprises a first positioning piece and a second positioning piece which are connected with each other, and the first positioning piece and the second positioning piece are connected with each other. The first positioning piece is provided with a positioning face extending in the first direction, the second positioning piece is provided with a positioning hole formed in the second direction, and the positioning face can be attached to the web so that positioning in the second direction can be achieved through face positioning. The positioning holes can coincide with the through holes, and the locking pieces can penetrate through the positioning holes and the through holes to achieve positioning in the first direction through hole positioning, so that positioning in the horizontal direction, namely the chordwise direction and the spanwise direction of the stringer is achieved through double positioning of face and hole combination, the positioning precision is improved, and the wallboard gluing quality is guaranteed. And meanwhile, the multiple positioning assemblies can be subjected to segmented constraint in the extending direction of the stringer, and accurate control over the axis degree of the stringer can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of aircraft composite parts manufacturing technology, and in particular to a stringer positioning device. Background Technology

[0002] The stringer is a crucial component of an aircraft, playing a supporting and load-bearing role in the aircraft structure. It is typically a rod-like structure made of high-strength, corrosion-resistant, and lightweight materials, such as carbon fiber reinforced resin matrix composites. It extends along the fuselage or wing surface and is connected to other structural components by welding, riveting, or adhesive bonding. The design and layout of the stringers are critical to the strength, stiffness, and stability of the entire aircraft structure. The tail fin panel of an aircraft generally employs a T-shaped stringer stiffened structure, formed using a dry stringer wet skin bonding process. The positioning and fit between the stringer and the skin are key factors determining the panel's quality and strength.

[0003] Currently, the main method for positioning the stringer is to rely on the contact between the fixed positioning plates and the web surface of the stringer to complete the positioning. However, this positioning method can be affected by positional errors between the positioning plates or the lack of effective control over the processing tolerances of the stringer. As the tolerances accumulate, the spanwise positioning and axis of the stringer will be affected, which in turn will reduce the fitting accuracy between the stringer and the skin feature area, and cause internal quality problems such as pores or delamination during gluing, resulting in a decline in the gluing quality and affecting the axis of the stringer and the forming quality of the wall panel. Utility Model Content

[0004] The purpose of this invention is to provide a stringer positioning device with high positioning accuracy.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A stringer positioning device is used to position a stringer extending along a first direction. The stringer includes a web, and the web has a plurality of through holes opened along a second direction, with the plurality of through holes spaced apart along the first direction. The stringer positioning device includes:

[0007] Panel forming fixtures are used to support the long stringer;

[0008] A positioning mechanism is provided on the wall panel forming fixture. The positioning mechanism includes multiple positioning components, which are spaced apart along the first direction. Each positioning component includes a locking member and a first positioning member and a second positioning member connected to each other. The first positioning member is provided with a positioning surface extending along the first direction and perpendicular to the second direction. The second positioning member is provided with a positioning hole opened along the second direction. Each positioning surface can fit against the web plate, and each positioning hole can coincide with a through hole, so that the locking member can pass through the positioning hole and the through hole.

[0009] Preferably, the positioning mechanism further includes a plurality of support plates spaced apart along the first direction, the support plates being disposed on the wall panel forming fixture, and the first positioning member being movable along the second direction and disposed on the support plates.

[0010] Preferably, the support plate is provided with a guide hole that extends along the second direction, and the first positioning member is provided with a movable member that can move within the guide hole.

[0011] Preferably, the positioning mechanism further includes a support base, one end of which is connected to the wall panel forming fixture, and the other end is connected to the support plate.

[0012] Preferably, each of the support plates is provided with a plurality of positioning components spaced apart along the second direction, and the positioning components are provided in a one-to-one correspondence with the stringers.

[0013] Preferably, the first positioning member and the second positioning member are detachably connected.

[0014] Preferably, there are multiple second positioning members, and the positions of the positioning holes on the different second positioning members are different. One of the multiple second positioning members is connected to the first positioning member.

[0015] Preferably, the positioning hole has a threaded wall, the locking member is threadedly connected to the positioning hole, and the locking member has a shoulder that can abut against the side of the web away from the positioning surface.

[0016] Preferably, the positioning mechanism further includes an end limiting component, which includes two limiting members that can limit the end of the stringer.

[0017] Preferably, the limiting member is also provided with a positioning block, which can contact the end web surface of the stringer.

[0018] The beneficial effects of this utility model are:

[0019] This utility model proposes a stringer positioning device for positioning a stringer extending along a first direction. The stringer includes a web and a through hole in the web along a second direction. The stringer positioning device includes a wall panel forming fixture and a positioning mechanism. The wall panel forming fixture is used to support the stringer, and the positioning mechanism is used to accurately position the web of the stringer. Specifically, the positioning mechanism includes multiple positioning components and locking elements. Each positioning component includes a first positioning element and a second positioning element connected to each other. The first positioning element is provided with a positioning surface extending along a first direction, and the second positioning element is provided with a positioning hole opening along a second direction. The positioning surface can fit against the web to achieve positioning along the second direction through surface positioning. The positioning hole can coincide with the through hole, and the locking element can pass through the positioning hole and the through hole to achieve positioning along the first direction through hole positioning. Thus, through the dual positioning of surface and hole combination, positioning in the horizontal direction, i.e., the chordal and spanwise directions of the stringer, is achieved, improving positioning accuracy and ensuring the bonding quality of the wall panel. In addition, multiple positioning components are spaced apart along the first direction, and multiple positioning components can cooperate with the web to perform segmented constraints along the extension direction of the stringer, enabling precise control of the stringer axis. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the long stringer positioning device proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the positioning mechanism proposed in this utility model;

[0022] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0023] Figure 4 This is a schematic diagram of the positioning component proposed in this utility model;

[0024] Figure 5 This is a schematic diagram of the limiting component proposed in this utility model.

[0025] In the picture:

[0026] 1. Panel forming fixture; 2. Positioning mechanism; 21. First positioning component; 211. Positioning surface; 212. Moving component; 213. Positioning pin; 22. Second positioning component; 221. Positioning hole; 23. Support plate; 24. Support base; 241. Base plate; 242. Vertical plate; 243. Reinforcing rib; 25. Locking component; 251. Shoulder; 26. Limiting component; 261. Positioning block; 3. Long stringer; 4. Skin. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] This invention proposes a stringer positioning device for positioning a stringer 3 extending along a first direction. The stringer 3 includes a web with multiple through holes along a second direction, spaced apart along the first direction. The stringer positioning device includes a panel forming fixture 1 and a positioning mechanism 2. The panel forming fixture 1 supports the stringer 3, and the positioning mechanism 2 is mounted on the panel forming fixture 1 for precise positioning of the stringer 3. Preferably, the first direction is perpendicular to the second direction. The stringer 3 mentioned in this invention is a T-shaped stringer, which includes a web and a flange extending in the same direction and perpendicular to each other. The web and the flange are connected at the middle position. The T-shaped stringer can be placed on the panel forming fixture 1 with the web facing upwards, i.e., with the flange parallel to the panel forming fixture 1.

[0032] Furthermore, the skin 4 can be directly laid flat on the wall panel forming fixture 1, and the stringer 3 is placed on top of the skin 4 to complete the subsequent positioning. Preferably, the skin 4 can be laid flat using an automatic tape laying process or a manual laying process.

[0033] Reference Figures 1 to 4 The positioning mechanism 2 includes multiple positioning components. Each positioning component includes a locking member 25 and a first positioning member 21 and a second positioning member 22 connected to each other. The first positioning member 21 is provided with a positioning surface 211 extending in a first direction, and the second positioning member 22 is provided with a positioning hole 221 opening in a second direction. Each positioning surface 211 can fit against the web plate to achieve positioning in the second direction through surface positioning. Each positioning hole 221 can coincide with a through hole on the web plate, so that the locking member 25 can pass through the positioning hole 221 and the through hole to achieve positioning in the first direction through hole positioning. This achieves dual positioning of surface and hole, improves positioning accuracy, and ensures the bonding quality of the wall panel. Moreover, the multiple positioning components are spaced apart along the first direction, which can perform segmented constraints along the extension direction of the stringer 3, and can achieve precise control of the axis of the stringer 3.

[0034] Specifically, the positioning mechanism 2 also includes support plates 23 spaced apart along a first direction. The support plates 23 are mounted on the panel forming fixture 1, and the first positioning element 21 is movably connected to the support plates 23 along a second direction. Before positioning the stringer 3, the position of the positioning components on the support plates 23 is adjusted. Specifically, when the first positioning element 21 moves on the support plates 23, the second positioning element 22 also moves accordingly, thereby moving the positioning surface 211 and the positioning hole 221. It is understandable that the position of the stringer 3 on the skin 4 differs when manufacturing different panels, meaning the spacing between the stringers 3 is different. Adjusting the position of the positioning components on the support plates 23 before positioning ensures that the stringers 3 are positioned correctly to produce the required panels, thus improving the overall applicability of the stringer positioning device.

[0035] In addition, when adjusting the specific position of the positioning component on the support plate 23, the positioning components on each support plate 23 should move together to ensure that multiple positioning components spaced apart along the first direction are on the same straight line, so that the axiality of the stringer 3 can be guaranteed when positioning the stringer 3 in the future.

[0036] Furthermore, the support plate 23 is provided with a guide hole, the length direction of which is parallel to the second direction. The first positioning member 21 is provided with a movable member 212, which can move within the guide hole, thereby providing guidance and constraint for the movement of the movable member 212. Specifically, the first positioning member 21 is provided with a first connecting hole that matches the size of the movable member 212. The movable member 212 can pass through the first connecting hole and the guide hole in sequence, thereby driving the first positioning member 21 to move in the second direction. An end cap is provided at the end of the movable member 212, and a fastener can also be fitted onto the movable member 212. The end cap and the fastener cooperate to fix the movable member 212 at a specific position within the guide hole, thereby fixing the first positioning member 21 at a specific position on the support plate 23. The circumference of the movable member 212 can be provided with threads, and the fastener is threadedly connected to the movable member 212. In the fixed state, the end cap of the movable part 212 and the fastener clamp the first positioning part 21 and the support plate 23. The friction between the first positioning part 21 and the support plate 23 is large, which makes the first positioning part 21 fixed in a specific position on the support plate 23. When different wall panels are to be made, the position of the first positioning part 21 on the support plate 23 is changed. The fastener is rotated so that the fastener and the end cap move away from each other. At this time, the first positioning part 21 and the support plate 23 are no longer in close contact. The first positioning part 21 can be moved so that the movable part 212 can move in the guide hole to change the position of the first positioning part 21 on the support plate 23.

[0037] In addition, size markings can be set on the guide hole to ensure that the moving part 212 can be moved to the correct position, thereby ensuring that the first positioning part 21 and the second component can be fixed in the correct position, and thus ensuring that the stringer 3 can be positioned in the correct position in the future.

[0038] To improve the stability of the first positioning member 21 when fixed on the support plate 23, a second connecting hole is provided on the first positioning member 21, and a corresponding elongated hole is provided on the support plate 23. The length direction of the elongated hole is consistent with the length direction of the guide hole, that is, the length direction of the elongated hole is parallel to the second direction. A positioning pin 213 can be used to pass through the second connecting hole and the elongated hole in sequence. Specifically, the positioning pin 213 is provided with a stop part, and a nut is sleeved on the positioning pin 213. After the first positioning member 21 is fixed on the support plate 23 by the end cap and fastener on the moving member 212, the nut on the positioning pin 213 is rotated so that the nut and the stop part come closer to each other to clamp the first positioning member 21 and the support plate 23, thereby improving the fixing stability of the first positioning member 21 and preventing the risk of the first positioning member 21 rotating when fixed only by the end cap and fastener on the moving member 212. Preferably, there are two second connecting holes, located above and below the first connecting hole respectively, and two positioning pins 213 are also provided accordingly.

[0039] Furthermore, the first positioning component 21 and the second positioning component 22 are detachably connected, allowing operators to adapt to different specifications of the stringer 3 by replacing the second positioning component 22 with different specifications, further improving the applicability of the stringer positioning device. Preferably, the first positioning component 21 and the second positioning component 22 are connected by bolts.

[0040] Furthermore, multiple second positioning elements 22 are provided, and the positioning holes 221 on different second positioning elements 22 are positioned differently. Multiple second positioning elements 22 are selected to connect with the first positioning element 21 to achieve hole positioning for different stringers 3. It should be explained that for different stringers 3, the web plate positions are the same, but the positions of the through holes on the web plate are different. When positioning different stringers 3 is required, the operator can replace the corresponding second positioning element 22 with the first positioning element 21, so that the positioning hole 221 on the second positioning element 22 coincides with the through hole on the web plate, thereby achieving hole positioning for different stringers 3.

[0041] The positioning mechanism 2 also includes a support base 24. One end of the support base 24 is connected to the wall panel forming fixture 1, and the other end is connected to the support plate 23. The support base 24 fixes the support plate 23 onto the wall panel forming fixture 1, and a gap is left between the support plate 23 and the wall panel forming fixture 1, allowing the stringer 3 to be placed on the wall panel forming fixture 1 through the gap for subsequent positioning operations. Preferably, the support base 24 is an L-shaped support plate, including a base plate 241 and a vertical plate 242. The base plate 241 is bolted to the wall panel forming fixture 1, and the vertical plate 242 is bolted to the support plate 23. A reinforcing rib 243 is provided between the base plate 241 and the vertical plate 242, which improves the support strength and rigidity of the support base 24 without increasing the wall thickness of the base plate 241 and the vertical plate 242, saving material usage, reducing weight, and lowering costs.

[0042] In addition, each support plate 23 is provided with multiple positioning components spaced apart along the second direction. Each positioning component can position the web plate on a stringer 3. Thus, the stringer positioning device can simultaneously position multiple stringers 3 in the second direction. Multiple stringers 3 can be simultaneously positioned on the skin 4, improving the production efficiency of subsequent wall panels.

[0043] To improve the accuracy and stability of hole positioning, the positioning hole 221 has threads on its wall. The locking member 25 is threadedly connected to the positioning hole 221, and the locking member 25 has a shoulder 251 that abuts against the web. Specifically, when the through hole on the web coincides with the positioning hole 221 on the second positioning member 22, the locking member 25 passes through both the through hole and the positioning hole 221 and is threaded into the positioning hole 221. At this time, the shoulder 251 on the locking member 25 abuts against the web, making the web and the second positioning member 22 fit tightly. This makes the hole positioning more stable, and the coaxiality of the through hole and the positioning hole 221 is further guaranteed, resulting in higher hole positioning accuracy.

[0044] In addition, the locking member 25 is also provided with a gripping part. By rotating the locking member 25 with the gripping part, the web plate is tightly attached to the second positioning member 22, improving the ease of operation. Preferably, the gripping part is curved, which can distribute the stress on the locking member 25 and make it easier to rotate.

[0045] Furthermore, the web includes a detachable excess portion and a solid web portion. Through holes are located in the excess portion, and the positioning surface 211 can fit against the solid web portion. After the girder 3 undergoes surface and hole positioning, the excess portion can be removed, leaving only the solid web portion of the girder 3, thus reducing structural weight. It is understandable that after the girder 3 is cured and processed, some excess material will appear on the web, dividing the web into two parts: the solid web portion and the excess portion. The solid web portion is the permanent load-bearing structure that is ultimately retained in the girder 3, while the excess portion serves as a temporary functional structure for processing and positioning. After positioning, the excess portion is removed by the workers, leaving only the solid web portion. Therefore, placing the through holes in the excess portion allows them to mate with the positioning holes 221 on the second positioning member 22. After both hole and surface positioning are completed, and the wall panel is cured, the workers can separate the excess portion from the solid web portion, not only reducing the weight of the girder 3 but also preventing damage to the overall shape of the girder 3's web portion and thus maintaining the overall structural strength of the wall panel. Preferably, the remaining portion of the web and the solid portion of the web can be nearly disassembled and separated using laser cutting technology.

[0046] Reference Figure 5To ensure accurate positioning of the ends of the stringer 3, the positioning mechanism 2 also includes an end-limiting assembly, which comprises two limiting members 26 that can limit the position of the ends of the stringer 3. Specifically, the limiting member 26 includes a positioning block 261 that can contact the end web surface of the stringer 3 to position both ends of the stringer 3. Specifically, the positioning block 261 is provided with an end-positioning surface. After the stringer 3 is placed on the skin 4 of the wall panel forming fixture 1, the operator can move the stringer 3 in a first direction so that the end face 3 of the stringer contacts the limiting member 26, and slightly move the stringer 3 in a second direction so that the end web surface of the stringer 3 contacts the end-positioning surface on the positioning block 261. That is, the positioning surface 211 on the first positioning member 21 and the end face on the positioning block 261 can provide the same force in the second direction, so that the position of the stringer 3 in the second direction is limited. Preferably, multiple positioning blocks 261 are provided and spaced apart along the second direction to correspond to positioning components spaced apart along the second direction.

[0047] The positioning process of this stringer positioning device is as follows:

[0048] The skin 4 is laid on top, and the positioning mechanism 2 is installed on the wall panel forming fixture 1. Then, the stringer 3 is placed on top of the skin 4, and the two ends of the stringer 3 are made to contact the two limiting members 26 to achieve positioning of the two ends of the stringer 3. Then, the belly of the stringer 3 is made to be in close contact with the positioning surface 211 to achieve surface positioning. Then, the stringer 3 is slightly moved so that the through hole on the belly plate is aligned with the positioning hole 221. The locking member 25 passes through the through hole and the positioning hole 221 and locks, thus achieving hole positioning.

[0049] In addition, before installing the positioning mechanism 2 on the wall panel forming fixture 1, the positioning mechanism 2 needs to be assembled first. Specifically, the appropriate second positioning part 22 is fixed to the first positioning part 21 with bolts, then the first positioning part 21 is installed on the support plate 23, and the first positioning part 21 is moved to the correct position and then the fasteners are tightened.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A stringer positioning device, characterized in that, For positioning a stringer (3) extending along a first direction, the stringer (3) includes a web, the web having a plurality of through holes opened along a second direction, and the plurality of through holes being spaced apart along the first direction, the stringer positioning device comprising: Panel forming fixture (1) is used to support the stringer (3); A positioning mechanism (2) is provided on the wall panel forming fixture (1). The positioning mechanism (2) includes a plurality of positioning components. The plurality of positioning components are spaced apart along the first direction. Each positioning component includes a locking member (25) and a first positioning member (21) and a second positioning member (22) connected to each other. The first positioning member (21) is provided with a positioning surface (211) extending along the first direction and perpendicular to the second direction. The second positioning member (22) is provided with a positioning hole (221) opened along the second direction. Each positioning surface (211) can fit against the web plate. Each positioning hole (221) can coincide with a through hole, so that the locking member (25) can pass through the positioning hole (221) and the through hole.

2. The stringer positioning device according to claim 1, characterized in that, The positioning mechanism (2) further includes a plurality of support plates (23) spaced apart along the first direction. The support plates (23) are disposed on the wall panel forming fixture (1), and the first positioning member (21) is movably disposed on the support plate (23) along the second direction.

3. The stringer positioning device according to claim 2, characterized in that, The support plate (23) is provided with a guide hole that extends along the second direction. The first positioning member (21) is provided with a moving member (212) that can move within the guide hole.

4. The stringer positioning device according to claim 2, characterized in that, The positioning mechanism (2) also includes a support base (24), one end of which is connected to the wall panel forming fixture (1), and the other end is connected to the support plate (23).

5. The stringer positioning device according to claim 2, characterized in that, Each of the support plates (23) is provided with a plurality of positioning components spaced apart along the second direction, and the positioning components are provided in a one-to-one correspondence with the stringers.

6. The stringer positioning device according to claim 1, characterized in that, The first positioning member (21) and the second positioning member (22) are detachably connected.

7. The stringer positioning device according to claim 6, characterized in that, Multiple second positioning elements (22) are provided, and the positions of the positioning holes (221) on different second positioning elements (22) are different. One of the multiple second positioning elements (22) is connected to the first positioning element (21).

8. The stringer positioning device according to claim 1, characterized in that, The positioning hole (221) has a threaded hole wall, the locking member (25) is threadedly connected to the positioning hole (221), and the locking member (25) has a shoulder (251) that can abut against the side of the web away from the positioning surface (211).

9. The stringer positioning device according to claim 1, characterized in that, The positioning mechanism (2) further includes an end limiting component, which includes two limiting members (26) that can limit the ends of the stringer (3).

10. The stringer positioning device according to claim 9, characterized in that, The limiting member (26) is also provided with a positioning block (261), which can contact the end web surface of the stringer (3).

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