Combined hat stringer hot die pressing preforming tool and hot die pressing equipment

Abstract

This utility model belongs to the field of hot molding technology, and discloses a combined hat-shaped stringer hot molding preforming fixture and hot molding equipment. The combined hat-shaped stringer hot molding preforming fixture includes an upper mold assembly, a lower mold assembly, and a limiting assembly. The upper mold assembly includes a first upper mold, a second upper mold, and a third upper mold. The second upper mold is disposed between the first and third upper molds and is detachably and fixedly connected to them. The lower mold assembly includes a first lower mold, a second lower mold, and a third lower mold. The second lower mold is disposed between the first and third lower molds and is detachably and fixedly connected to them. The limiting assembly includes at least two limiting hemispheres. One of the first and second upper molds has a limiting hemisphere, and the other has a limiting ball groove. The limiting hemisphere can be limited and connected within the limiting ball groove. This combined hat-shaped stringer hot molding preforming fixture improves the connection accuracy between modules.

Description

Technical Field

[0001] This utility model relates to the field of hot molding technology, and in particular to a combined hat-shaped stringer hot molding preforming tooling and hot molding equipment. Background Technology

[0002] The cap-shaped stringer is a typical structure of aircraft fuselage. Its cross-sectional shape resembles an inverted hat, allowing it to close with the aircraft skin, thus giving the panel structure high stability. The processing of cap-shaped stringers generally employs hot molding preforming, automatic tape laying, hot diaphragm molding, and co-curing processes. Hot molding preforming is the most common process. In hot molding preforming, the cut blank is placed in a heated mold cavity. Mechanical force is applied by pressing down on the mold, softening the blank and filling the mold to form the desired cap-shaped stringer. Mold fixtures are often used during hot molding preforming of cap-shaped stringers. Currently, most preforming fixtures adopt a segmented structure design, with each segment consisting of multiple separate modules. Multiple modules need to be transported and installed one by one on the molding equipment platform. Due to the large cumulative error of the segmented structure, it is difficult to guarantee the positioning accuracy of the interfaces between modules.

[0003] The existing hot molding preforming tooling for hat-shaped stringers uses a segmented structure design for both the upper and lower molds. Each mold consists of three separate modules connected together, which simplifies the tooling and allows for overall transport of the tooling. However, the positioning between the upper and lower molds during engagement is inaccurate, and the connection accuracy of the three separate modules of each mold is poor, resulting in the quality of the hat-shaped stringers after hot molding not meeting the standards.

[0004] Therefore, there is an urgent need for a combined cap-shaped stringer hot molding preforming fixture and hot molding equipment to solve the above problems. Utility Model Content

[0005] One of the objectives of this invention is to provide a modular cap-shaped stringer hot molding preforming fixture. This eliminates the need for precise manual alignment, significantly reducing misalignment errors during module assembly, improving connection accuracy between modules, reducing manual adjustment time, and extending the service life of the modular cap-shaped stringer hot molding preforming fixture.

[0006] The second objective of this invention is to provide a hot molding device that can improve the precision of the upper and lower mold components during engagement, thereby increasing the quality of the cap-shaped stringer.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A combined cap-shaped stringer hot molding preforming fixture includes:

[0009] The upper mold assembly includes a first upper mold, a second upper mold, and a third upper mold. The second upper mold is disposed between the first upper mold and the third upper mold, and the second upper mold is detachably and fixedly connected to the first upper mold and the third upper mold.

[0010] The lower mold assembly includes a first lower mold, a second lower mold, and a third lower mold. The second lower mold is disposed between the first lower mold and the third lower mold, and the second lower mold is detachably and fixedly connected to the first lower mold and the third lower mold.

[0011] A limiting component includes at least two limiting hemispheres. The limiting hemispheres are provided on the same surface of one of the first upper mold and the second upper mold, and the other mold has a limiting ball groove. The limiting hemispheres can be limited and connected within the limiting ball groove.

[0012] Preferably, the second upper mold includes:

[0013] First connecting part;

[0014] The first mold body has the first connecting part integrally formed on the upper end of the first mold body, forming a T-shaped structure with the first mold body. The first upper mold and the third upper mold are respectively connected to the right angles on both sides of the T-shaped structure to limit the first upper mold and the third upper mold.

[0015] Preferably, four limiting hemispheres are provided. Two limiting hemispheres are provided on the side wall of the first mold body and are arranged at intervals along the extension direction of the first mold body. The other two limiting hemispheres are provided on the lower wall of the first connecting part and are arranged at intervals along the extension direction of the first connecting part. Correspondingly, the side wall of the first upper mold and the upper wall of the first upper mold are provided with corresponding limiting ball grooves.

[0016] Preferably, the second upper mold is connected to the first upper mold and the third upper mold via a connecting pin; and the second lower mold is connected to the first lower mold and the third lower mold via the connecting pin.

[0017] Preferably, the second upper mold has multiple pairs of first connecting holes, which are spaced apart along the extending direction of the second upper mold. The connecting pin passes through one of the first connecting holes in each pair to connect the first upper mold and the second upper mold, and the connecting pin passes through the other of the first connecting holes in each pair to connect the second upper mold and the third upper mold.

[0018] Preferably, the combined hat-shaped stringer hot molding preforming tooling further includes a positioning component, which includes a positioning element and a positioning insert. One of the positioning element and the positioning insert is disposed in the first upper mold, and the other is disposed in the first lower mold. The positioning element can be inserted into the positioning insert.

[0019] And / or, one of the positioning member and the positioning insert is disposed on the third upper mold and the other is disposed on the third lower mold, and the positioning member can be inserted into the positioning insert.

[0020] Preferably, the second lower mold includes:

[0021] The second connector is detachably and fixedly connected to the first upper mold and the third upper mold;

[0022] The lower end of the second mold body can be limited and connected to the second connector.

[0023] Preferably, the upper end face of the second connector is recessed with a connecting groove, and a portion of the second mold body is accommodated in the connecting groove.

[0024] A hot molding equipment includes an upper adsorption platform, a lower adsorption platform, and a combined cap-shaped stringer hot molding preforming fixture as described above. The upper adsorption platform is provided with a first platform zero-point locator, the lower adsorption platform is provided with a second platform zero-point locator, the second upper mold is provided with a base for the first platform locator, the base for the first platform locator can be connected to the locating pin of the first platform zero-point locator, and the first lower mold is provided with a base for the second platform locator, the base for the second platform locator can be connected to the locating pin of the second platform zero-point locator.

[0025] Preferably, the hot molding equipment further includes an automatic changing device, and the third lower mold is provided with a tooling replacement insert, and the automatic changing device can insert the tooling replacement insert.

[0026] The beneficial effects of this utility model are:

[0027] This utility model provides a combined cap-shaped stringer hot molding preforming fixture, including an upper mold assembly, a lower mold assembly, and a limiting assembly. The upper mold assembly includes a first upper mold, a second upper mold, and a third upper mold. The second upper mold is disposed between the first upper mold and the third upper mold and is detachably and fixedly connected to the first upper mold and the third upper mold. The lower mold assembly includes a first lower mold, a second lower mold, and a third lower mold. The second lower mold is disposed between the first lower mold and the third lower mold and is detachably and fixedly connected to the first lower mold and the third lower mold. The limiting assembly includes at least two limiting hemispheres. A limiting hemisphere is provided on the same surface of one of the first upper mold and the second upper mold, and a limiting ball groove is formed on the other upper mold. The limiting hemisphere can be limited and connected in the limiting ball groove.

[0028] By setting a limiting hemisphere and a limiting ball groove between the first and second upper dies, when the first and second upper dies are combined and connected, the limiting hemisphere can be accurately positioned in the limiting ball groove by the guidance of the arc surface of its outer wall. The curved surface contact between the limiting hemisphere and the limiting ball groove has self-guiding properties. When the first and second upper dies are combined and connected, no manual precise alignment is required. The two modules will automatically adjust their positions during the contact process to ensure center alignment, which greatly reduces the misalignment error when the modules are combined and improves the connection accuracy between the modules. Moreover, the curved surface fit can form multi-point contact, which can more stably limit the displacement between the first and second modules compared with planar limiting or pin hole limiting. At the same time, the setting of the limiting hemisphere and the limiting ball groove does not require strict alignment of the hole position. The modules only need to be roughly aligned and can be assembled by the guidance of the limiting hemisphere and the limiting ball groove, reducing the manual adjustment time. In addition, the limiting hemisphere has strong impact resistance and deformation resistance, and is not easy to bend or deform, which extends the service life of the combined cap-shaped stringer hot molding preforming tooling.

[0029] This utility model also provides a hot molding equipment. By applying the above-mentioned combined hat-shaped stringer hot molding preforming tooling, the accuracy of the upper mold assembly and the lower mold assembly when fastening is improved, and the quality of the hat-shaped stringer is improved. Attached Figure Description

[0030] Figure 1 This is an isometric view of the combined hat-shaped stringer hot molding preforming tooling described in this embodiment of the utility model;

[0031] Figure 2 This is an isometric view of the upper mold assembly described in this embodiment of the present invention;

[0032] Figure 3 This is an exploded view of the upper mold assembly described in this embodiment of the present invention;

[0033] Figure 4 This is an isometric view of the lower mold assembly described in this embodiment of the present invention;

[0034] Figure 5 This is an exploded view of the lower mold assembly described in an embodiment of this utility model.

[0035] In the picture:

[0036] 1. Upper mold assembly; 11. First upper mold; 12. Second upper mold; 121. First connecting part; 122. First mold body; 123. First connecting hole; 124. First platform locator base; 13. Third upper mold;

[0037] 2. Lower mold assembly; 21. First lower mold; 211. Second platform locator base; 22. Second lower mold; 221. Second connector; 2211. Connecting groove; 2212. Second connecting hole; 222. Second mold body; 23. Third lower mold; 231. Tooling replacement insert; 232. Conical guide insert for storage;

[0038] 3. Connecting pin;

[0039] 4. Positioning component; 41. Positioning element; 42. Positioning insert. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0041] 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 or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or 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 according to the specific circumstances.

[0042] In the description of this utility model, unless otherwise expressly 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.

[0043] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] This embodiment provides a combined cap-shaped stringer hot molding preforming tooling, such as... Figures 1-5 As shown, the assembly includes an upper mold assembly 1, a lower mold assembly 2, and a limiting assembly. The upper mold assembly 1 includes a first upper mold 11, a second upper mold 12, and a third upper mold 13. The second upper mold 12 is disposed between the first upper mold 11 and the third upper mold 13, and the second upper mold 12 is detachably and fixedly connected to the first upper mold 11 and the third upper mold 13. The lower mold assembly 2 includes a first lower mold 21, a second lower mold 22, and a third lower mold 23. The second lower mold 22 is disposed between the first lower mold 21 and the third lower mold 23, and the second lower mold 22 is detachably and fixedly connected to the first lower mold 21 and the third lower mold 23. The limiting assembly includes at least two limiting hemispheres. A limiting hemisphere is provided on the same surface of one of the first upper mold 11 and the second upper mold 12, and a limiting ball groove is formed on the other. The limiting hemisphere can be limited and connected in the limiting ball groove.

[0045] By setting a limiting hemisphere and a limiting ball groove between the first upper mold 11 and the second upper mold 12, when the first upper mold 11 and the second upper mold 12 are combined and connected, the limiting hemisphere can be accurately positioned in the limiting ball groove by the guidance of the arc surface of its outer wall. The curved surface contact between the limiting hemisphere and the limiting ball groove has self-guiding properties. When the first upper mold 11 and the second upper mold 12 are combined and connected, no manual precise alignment is required. The two modules will automatically adjust their positions during the contact process to ensure center alignment, which greatly reduces the misalignment error when the modules are combined and improves the inter-module alignment. The connection accuracy is high, and the curved surface fit can form multi-point contact. Compared with planar limit or pin hole limit, it can more stably limit the displacement between the first upper mold 11 and the second upper mold 12. At the same time, the setting of the limit hemisphere and the limit ball groove does not require strict alignment of the hole position. The modules only need to be roughly aligned and the assembly can be completed by the guidance of the limit hemisphere and the limit ball groove, reducing the manual adjustment time. In addition, the structure of the limit hemisphere has strong impact resistance and deformation resistance, and is not easy to bend or deform, which extends the service life of the combined hat-shaped stringer hot molding preforming tooling.

[0046] Specifically, in this embodiment, the second upper mold 12 is provided with a limiting hemisphere, and the first upper mold 11 is provided with a limiting ball groove. In other embodiments, the second upper mold 12 is provided with a limiting ball groove, and the first upper mold 11 is provided with a limiting hemisphere.

[0047] More specifically, in this embodiment, the third upper mold 13 is provided with a limiting ball groove, and is limited and connected to the limiting hemisphere provided with the second upper mold 12.

[0048] Optionally, such as Figure 2As shown, the second upper mold 12 includes a first connecting portion 121 and a first mold body 122. The first connecting portion 121 is integrally formed on the upper end of the first mold body 122, forming a T-shaped structure with the first mold body 122. The first upper mold 11 and the third upper mold 13 are respectively connected to the right angles on both sides of the T-shaped structure to limit the movement of the first upper mold 11 and the third upper mold 13. Through the connection at the right angles, the T-shaped structure can limit the displacement of the first upper mold 11 and the third upper mold 13 in both the lateral and longitudinal directions, ensuring that the mold does not shift during operation. Specifically, the T-shaped structure combines a limiting hemisphere and a limiting ball groove, achieving dual protection of the limiting between the first upper mold 11 and the second upper mold 12 through a composite limiting of flexible curved surface fitting and rigid right angle limiting. Accordingly, as Figure 2 As shown, the third upper mold 13 also forms a double limit with the second upper mold 12.

[0049] Specifically, in this embodiment, four limiting hemispheres are provided. Two limiting hemispheres are located on the side wall of the first mold body 122, and are spaced apart along the extension direction of the first mold body 122. The other two limiting hemispheres are located on the lower wall of the first connecting part 121, and are also spaced apart along the extension direction of the first connecting part 121. Correspondingly, the side wall and upper wall of the first upper mold 11 are provided with corresponding limiting ball grooves. Two spaced limiting hemispheres are provided on both the side wall and the lower wall of the first mold body 122, distributed in different directions, forming a dual positioning in three-dimensional space: the limiting on the side wall of the first mold body 122 can restrict its relative sliding with the first upper mold 11 in the horizontal direction, and the limiting on the lower wall of the first connecting part 121 can restrict the misalignment of the two in the vertical direction. The two work together to ensure assembly accuracy and generate additional force to resist vibration when the preform tooling is working, avoiding failure of the fit between the first upper mold 11 and the second upper mold 12. In other embodiments, six or eight limiting hemispheres are provided. No limitation is made here. It should be noted that the arrangement of the limiting ball groove and limiting hemispheres between the third upper mold 13 and the second upper mold 12 is the same as the arrangement of the limiting ball groove and limiting hemispheres between the first upper mold 11 and the second upper mold 12. Further details are omitted here.

[0050] Specifically, such as Figures 2-5 As shown, in this embodiment, the second upper mold 12 is connected to the first upper mold 11 and the third upper mold 13 via connecting pins 3; and the second lower mold 22 is connected to the first lower mold 21 and the third lower mold 23 via connecting pins 3. In other embodiments, the second upper mold 12 is connected to the first upper mold 11 and the third upper mold 13 via bolts; and the second lower mold 22 is connected to the first lower mold 21 and the third lower mold 23 via bolts, or the second upper mold 12 is connected to the first upper mold 11 and the third upper mold 13 via rivets; and the second lower mold 22 is connected to the first lower mold 21 and the third lower mold 23 via bolts, etc. No limitations are imposed here.

[0051] Specifically, such as Figure 3 As shown, the second upper mold 12 has multiple pairs of first connecting holes 123, which are spaced apart along the extending direction of the second upper mold 12. A connecting pin 3 passes through one of the first connecting holes 123 in each pair to connect the first upper mold 11 and the second upper mold 12, and passes through the other of the first connecting holes 123 to connect the second upper mold 12 and the third upper mold 13. The arrangement of multiple pairs of first connecting holes 123 improves the connection stability and structural symmetry between the second upper mold 12 and the first upper mold 11, and between the second upper mold 12 and the third upper mold 13.

[0052] More specifically, in this embodiment, the second upper mold 12 has three pairs of first connecting holes 123. In other embodiments, the second upper mold 12 has two, four, or five pairs of first connecting holes 123. No limitation is made here.

[0053] Optionally, such as Figure 1 and Figure 2 As shown, the combined cap-shaped stringer hot molding preforming fixture also includes a positioning component 4. The positioning component 4 includes a positioning element 41 and a positioning insert 42. One of the positioning element 41 and the positioning insert 42 is disposed in the first upper mold 11, and the other is disposed in the first lower mold 21. The positioning element 41 can be inserted into the positioning insert 42. Alternatively, one of the positioning element 41 and the positioning insert 42 is disposed in the third upper mold 13, and the other is disposed in the third lower mold 23. The positioning element 41 can be inserted into the positioning insert 42. During the engagement of the upper mold assembly 1 and the lower mold assembly 2, the positioning element 41 can be inserted into the positioning insert 42, providing a certain positioning and guiding function for the engagement of the upper mold assembly 1 and the lower mold assembly 2. Through the cooperation of the positioning insert 42 and the positioning element 41, the positional accuracy of the upper mold assembly 1 and the lower mold assembly 2 during engagement is ensured. Specifically, in this embodiment, the positioning element 41 is a positioning rod. In other embodiments, the positioning element 41 is a positioning pin or a positioning plate, etc. No limitation is made here.

[0054] Specifically, in this embodiment, the positioning element 41 is connected to the first upper mold 11, and the positioning insert 42 is connected to the first lower mold 21. The positioning element 41 can be inserted into the positioning insert 42. Furthermore, the positioning element 41 is connected to the third upper mold 13, and the positioning insert 42 is connected to the third lower mold 23. The positioning element 41 can be inserted into the positioning insert 42. This configuration allows for simultaneous positioning and guidance from both sides of the second upper mold 12, further improving the positional accuracy when the upper mold assembly 1 and the lower mold assembly 2 are engaged. In other embodiments, the positioning insert 42 is connected to the first upper mold 11, and the positioning element 41 is connected to the first lower mold 21, allowing the positioning element 41 to be inserted into the positioning insert 42; or the positioning insert 42 is connected to the third upper mold 13, and the positioning element 41 is connected to the third lower mold 23, allowing the positioning element 41 to be inserted into the positioning insert 42. No limitations are imposed here.

[0055] More specifically, such as Figures 1-3 As shown, there are four positioning components 4. The positioning parts 41 of two positioning components 4 are connected to the first upper mold 11, and the two corresponding positioning inserts 42 are connected to the first lower mold 21. The positioning parts 41 of the other two positioning components 4 are connected to the third upper mold 13, and the two corresponding positioning inserts 42 are connected to the third lower mold 23.

[0056] Specifically, in this embodiment, the positioning element 41 is integrally formed and connected to the first upper mold 11, and the positioning insert 42 is embedded in the first lower mold 21. In other embodiments, the positioning element 41 is threadedly connected to the first upper mold 11, and the positioning insert 42 is embedded in the first lower mold 21, etc. No limitation is made here.

[0057] Optionally, such as Figure 4 As shown, the second lower mold 22 includes a second connecting member 221 and a second mold body 222. The second connecting member 221 is detachably and fixedly connected to the first upper mold 11 and the third upper mold 13. The lower end of the second mold body 222 can be limited and connected to the second connecting member 221. This design allows for the separate replacement or repair of either the second connecting member 221 or the second mold body 222, significantly reducing maintenance and time costs, while also improving the equipment's lifespan and operational flexibility. It should be noted that the second connecting member 221 is connected to the first lower mold 21 and the third lower mold 23 via a connecting pin 3.

[0058] Specifically, the upper end face of the second connector 221 is recessed with a connecting groove 2211, and a portion of the second mold body 222 is accommodated within the connecting groove 2211. The connecting groove 2211 not only enables the positioning and connection of the second mold body 222 and the second connector 221, ensuring assembly stability, but also saves space through its partial accommodating structure. In other embodiments, the second mold body 222 and the second connector 221 are connected by a slot and a protrusion, or by a slot and a pin. No limitations are imposed here.

[0059] Specifically, such as Figure 3 As shown, the second connector 221 has multiple pairs of second connecting holes 2212, which are spaced apart along the extending direction of the second connector 221. One of the second connecting holes 2212 in each pair is connected to the first lower mold 21 via a connecting pin 3, and the other is connected to the third lower mold 23 via a connecting pin 3. The arrangement of multiple pairs of second connecting holes 2212 improves the connection stability and structural symmetry between the second lower mold 22 and the first lower mold 21, as well as between the second lower mold 22 and the third lower mold 23.

[0060] More specifically, in this embodiment, the second lower mold 22 has three pairs of second connecting holes 2212. In other embodiments, the second lower mold 22 has two, four, or five pairs of second connecting holes 2212. No limitation is made here.

[0061] This embodiment also provides a hot molding equipment, which includes an upper adsorption platform, a lower adsorption platform, and a combined hat-shaped stringer hot molding preforming fixture. The upper adsorption platform is equipped with a first platform zero-point locator, and the lower adsorption platform is equipped with a second platform zero-point locator. The second upper mold 12 is equipped with a first platform locator base 124, which can be connected to the locating pin of the first platform zero-point locator. The first lower mold 21 is equipped with a second platform locator base 211, which can be connected to the locating pin of the second platform zero-point locator. By applying the combined hat-shaped stringer hot molding preforming fixture, the accuracy of the upper mold assembly 1 and the lower mold assembly 2 when fastened together is improved, and the quality of the hat-shaped stringer is improved.

[0062] Optionally, the hot molding equipment also includes an automatic changing device. The third lower mold 23 is equipped with a tooling replacement insert 231, and the automatic changing device can insert the tooling replacement insert 231. Through the cooperation of the automatic changing device and the tooling replacement insert 231, the labor intensity is reduced and the degree of automation is improved.

[0063] Optionally, the hot molding equipment also includes a placement platform with positioning protrusions. The third lower mold 23 is equipped with a storage conical guide insert 232. After the automatic changing device disassembles the lower mold assembly 2 by replacing the insert 231 with tooling, it places the lower mold assembly 2 on the placement platform, so that the positioning protrusions connect with the storage conical guide insert 232. This improves the uniformity and standardization of the placement of the lower mold assembly 2, and avoids damage to the lower mold assembly 2 due to improper placement.

[0064] 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 other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations 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 combined cap-shaped stringer hot molding preforming tooling, characterized in that, include: The upper mold assembly (1) includes a first upper mold (11), a second upper mold (12) and a third upper mold (13). The second upper mold (12) is disposed between the first upper mold (11) and the third upper mold (13), and the second upper mold (12) is detachably and fixedly connected to the first upper mold (11) and the third upper mold (13). The lower mold assembly (2) includes a first lower mold (21), a second lower mold (22) and a third lower mold (23). The second lower mold (22) is disposed between the first lower mold (21) and the third lower mold (23), and the second lower mold (22) is detachably and fixedly connected to the first lower mold (21) and the third lower mold (23). The limiting component includes at least two limiting hemispheres. The limiting hemispheres are provided on the same surface of one of the first upper mold (11) and the second upper mold (12), and the other has a limiting ball groove. The limiting hemispheres can be limited and connected in the limiting ball groove.

2. The combined cap-shaped stringer hot molding preforming tooling according to claim 1, characterized in that, The second upper mold (12) includes: First connecting part (121); The first mold body (122) has the first connecting part (121) integrally formed on the upper end of the first mold body (122) to form a T-shaped structure with the first mold body (122). The first upper mold (11) and the third upper mold (13) are respectively connected to the right angles on both sides of the T-shaped structure to form a limit on the first upper mold (11) and the third upper mold (13).

3. The combined cap-shaped stringer hot molding preforming tooling according to claim 2, characterized in that, Four limiting hemispheres are provided. Two of the limiting hemispheres are located on the side wall of the first mold body (122) and are arranged at intervals along the extension direction of the first mold body (122). The other two limiting hemispheres are located on the lower wall of the first connecting part (121) and are arranged at intervals along the extension direction of the first connecting part (121). Correspondingly, the side wall of the first upper mold (11) and the upper wall of the first upper mold (11) are provided with corresponding limiting ball grooves.

4. The combined cap-shaped stringer hot molding preforming tooling according to claim 1, characterized in that, The second upper mold (12) is connected to the first upper mold (11) and the third upper mold (13) via a connecting pin (3); and the second lower mold (22) is connected to the first lower mold (21) and the third lower mold (23) via the connecting pin (3).

5. The combined cap-shaped stringer hot molding preforming tooling according to claim 4, characterized in that, The second upper mold (12) has multiple pairs of first connecting holes (123), which are spaced apart along the extension direction of the second upper mold (12). The connecting pin (3) passes through one of the first connecting holes (123) to connect the first upper mold (11) and the second upper mold (12), and the connecting pin (3) passes through the other of the first connecting holes (123) to connect the second upper mold (12) and the third upper mold (13).

6. The combined cap-shaped stringer hot molding preforming tooling according to claim 1, characterized in that, The combined hat-shaped stringer hot molding preforming tooling also includes a positioning component (4), which includes a positioning element (41) and a positioning insert (42). One of the positioning element (41) and the positioning insert (42) is disposed on the first upper mold (11), and the other is disposed on the first lower mold (21). The positioning element (41) can be inserted into the positioning insert (42). And / or, one of the positioning element (41) and the positioning insert (42) is disposed on the third upper mold (13) and the other is disposed on the third lower mold (23), and the positioning element (41) can be inserted into the positioning insert (42).

7. The combined cap-shaped stringer hot molding preforming tooling according to claim 1, characterized in that, The second lower mold (22) includes: The second connector (221) is detachably and fixedly connected to the first upper mold (11) and the third upper mold (13); The lower end of the second mold body (222) can be limited and connected to the second connector (221).

8. The combined cap-shaped stringer hot molding preforming tooling according to claim 7, characterized in that, The upper end face of the second connector (221) is recessed with a connecting groove (2211), and part of the second mold body (222) is accommodated in the connecting groove (2211).

9. A hot molding equipment, characterized in that, The hot molding equipment includes an upper adsorption platform, a lower adsorption platform, and a combined cap-shaped stringer hot molding preforming fixture as described in any one of claims 1-8. The upper adsorption platform is provided with a first platform zero-point locator, and the lower adsorption platform is provided with a second platform zero-point locator. The second upper mold (12) is provided with a first platform locator base (124), which can be connected to the locating pin of the first platform zero-point locator. The first lower mold (21) is provided with a second platform locator base (211), which can be connected to the locating pin of the second platform zero-point locator.

10. The hot molding equipment according to claim 9, characterized in that, The hot molding equipment also includes an automatic changing device. The third lower mold (23) is provided with a tooling change insert (231), and the automatic changing device can insert the tooling change insert (231).

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