Composite material oil tank lower skin forming mold

Abstract

The utility model discloses a composite material oil tank lower skin forming die, and relates to the technical field of tools, the composite material oil tank lower skin forming die comprises a middle insert with an upward opening, and the left part of the lower side of the middle insert is detachably connected with a first left lower die plate and a second left lower die plate which are attached together in the front-back direction; a first middle lower die plate is detachably connected to the lower side of the middle insert on the right side of the first left lower die plate, a second middle lower die plate is detachably connected to the lower side of the middle insert on the right side of the second left lower die plate, and a first right lower die plate is detachably connected to the lower side of the middle insert on the right side of the first middle lower die plate. The lower side of the middle insert on the right side of the second middle lower die plate is detachably connected with a second right lower die plate, the left side of the middle insert is detachably connected with a left insert on the upper side of the first left lower die plate, and the right side of the middle insert is detachably connected with a right insert on the upper side of the first right upper die plate. The mold has the advantages that the material pieces are laid along the periphery formed by the lower mold plates and the middle inserts, forming of the lower skin is facilitated, and demolding is facilitated by arranging the middle inserts and the lower mold plates which are detachably connected together.

Description

TECHNICAL FIELD

[0001] The utility model relates to tooling technical field, especially a composite material oil tank lower skin forming die. BACKGROUND

[0002] At present, most of the unmanned aerial vehicle oil tanks are metal oil tanks, which have the defects of high weight and long maintenance cycle. With the wide application of composite materials, some small unmanned helicopters also use composite materials to make oil tanks. The lower skin of the oil tank is an important part of the oil tank, which is mainly used to maintain the shape of the oil tank and bear the aerodynamic load. The shape of the lower skin of the oil tank is complex and the structure is compact, so the mold design is relatively complicated, which leads to difficult demolding and prolongs the manufacturing cycle and increases the production cost. SUMMARY

[0003] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] To solve the above technical problems, the utility model provides the following technical scheme:

[0005] A composite material oil tank lower skin forming die, comprising an intermediate insert with an upward opening, a first left lower mold plate and a second left lower mold plate are detachably connected to the left part of the lower side of the intermediate insert and are attached together in the front-rear direction, a first intermediate lower mold plate is detachably connected to the lower side of the intermediate insert on the right side of the first left lower mold plate, a second intermediate lower mold plate is detachably connected to the lower side of the intermediate insert on the right side of the second left lower mold plate, a first right lower mold plate is detachably connected to the lower side of the intermediate insert on the right side of the first intermediate lower mold plate, a second right lower mold plate is detachably connected to the lower side of the intermediate insert on the right side of the second intermediate lower mold plate, a left insert is detachably connected to the upper side of the first left lower mold plate on the left side of the intermediate insert, and a right insert is detachably connected to the upper side of the first right upper mold plate on the right side of the intermediate insert.

[0006] As a preferred scheme of the composite material oil tank lower skin forming die of the utility model, wherein: a plurality of first left lower positioning counterbores and first left lower connecting counterbores are opened at one end of the upward first left lower mold plate, a first left lower positioning pin is inserted into the first left lower positioning counterbores through the first left lower mold plate, a plurality of first left lower positioning holes corresponding to the first left lower positioning counterbores and a plurality of first left lower connecting holes corresponding to the first left lower connecting counterbores are opened on the bottom plate of the intermediate insert, and the intermediate insert is sleeved on the corresponding first left lower positioning pin through the first left lower positioning hole.

[0007] As a preferred scheme of the composite material oil tank lower skin forming die, the second left lower die plate has a plurality of second left lower positioning counterbores and second left lower connecting counterbores at one end thereof facing upward, the second left lower die plate is inserted with second left lower positioning pins through the second left lower positioning counterbores, the bottom plate of the middle insert block has a plurality of second left positioning holes corresponding to the second left lower positioning counterbores and second left lower connecting holes corresponding to the second left lower connecting counterbores, and the middle insert block is sleeved on the corresponding second left lower positioning pins through the second left positioning holes.

[0008] As a preferred scheme of the composite material oil tank lower skin forming die, the first intermediate lower die plate has a plurality of first intermediate positioning counterbores and first intermediate connecting counterbores at one end thereof facing upward, the first intermediate lower die plate is inserted with first intermediate positioning pins through the second intermediate positioning counterbores, the bottom plate of the middle insert block has a plurality of first intermediate positioning holes corresponding to the first intermediate positioning counterbores and first intermediate connecting holes corresponding to the first intermediate connecting counterbores, and the middle insert block is sleeved on the corresponding first intermediate positioning pins through the first intermediate positioning holes.

[0009] As a preferred scheme of the composite material oil tank lower skin forming die, the second intermediate lower die plate has a plurality of second intermediate positioning counterbores and second intermediate connecting counterbores at one end thereof facing upward, the second intermediate lower die plate is inserted with second intermediate positioning pins through the second intermediate positioning counterbores, the bottom plate of the middle insert block has a plurality of second intermediate positioning holes corresponding to the second intermediate positioning counterbores and second intermediate connecting holes corresponding to the second intermediate connecting counterbores, and the middle insert block is sleeved on the corresponding second intermediate positioning pins through the second intermediate positioning holes.

[0010] As a preferred scheme of the composite material oil tank lower skin forming die, the first right lower die plate has a plurality of first right lower positioning counterbores and first right lower connecting counterbores at one end thereof facing upward, the first right lower die plate is inserted with first right lower positioning pins through the first right lower positioning counterbores, the bottom plate of the middle insert block has a plurality of first right lower positioning holes corresponding to the first right lower positioning counterbores and first right lower connecting holes corresponding to the first right lower connecting counterbores, and the middle insert block is sleeved on the corresponding first right lower positioning pins through the first right lower positioning holes.

[0011] As a preferred scheme of the composite material oil tank lower skin forming die, the second right lower die plate has a plurality of second right lower positioning counterbores and second right lower connecting counterbores at one end thereof facing upward, the second right lower die plate is inserted with second right lower positioning pins through the second right lower positioning counterbores, the bottom plate of the middle insert block has a plurality of second right lower positioning holes corresponding to the second right lower positioning counterbores and second right lower connecting holes corresponding to the second right lower connecting counterbores, and the middle insert block is sleeved on the corresponding second right lower positioning pins through the second right lower positioning holes.

[0012] As a preferred scheme of the composite material oil tank lower skin forming die, the front end and the rear end of the middle insert block are respectively provided with a plurality of first front connecting holes and a plurality of first rear connecting holes, the front insert block is provided with a plurality of second front connecting holes corresponding to the first front connecting holes, and the rear insert block is provided with a plurality of second rear connecting holes corresponding to the first rear connecting holes.

[0013] As a preferred scheme of the composite material oil tank lower skin forming die, the front end and the rear end of the middle insert block are respectively provided with a plurality of first front connecting holes and a plurality of first rear connecting holes, the front insert block is provided with a plurality of second front connecting holes corresponding to the first front connecting holes, and the rear insert block is provided with a plurality of second rear connecting holes corresponding to the first rear connecting holes.

[0014] As a preferred scheme of the composite material oil tank lower skin forming die, the front end and the rear end of the middle insert block are respectively provided with a plurality of first front connecting holes and a plurality of first rear connecting holes, the front insert block is provided with a plurality of second front connecting holes corresponding to the first front connecting holes, and the rear insert block is provided with a plurality of second rear connecting holes corresponding to the first rear connecting holes.

[0015] The utility model discloses beneficial effects are as follows: after the joint of each insert block, material sheet is convenient to lay, that is, the preliminary forming of lower skin is convenient, each insert block is detachably connected together, and the demoulding after the forming of lower skin is convenient, when installing each insert block, the installation positioning between two insert blocks of mutual cooperation is realized through the setting of corresponding positioning pin, and the fixed connection between the insert block of mutual cooperation is convenient, when needing to take out corresponding positioning pin from the insert block, the dismounting spare is just inserted into the plug-in recess in plug-in hole, and the step of dismounting spare is made to resist on the positioning pin of plug-in hole side, and positioning pin can be pulled out corresponding insert block by pulling dismounting spare, further convenient the separation of insert block, and the demoulding is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor. Among them:

[0017] Figure 1 It is a front view of the lower skin on the composite oil tank lower skin forming die.

[0018] Figure 2 It is a three-dimensional structure of the composite oil tank lower skin forming die Figure 1 .

[0019] Figure 3 It is a three-dimensional structure of the composite oil tank lower skin forming die Figure 2 .

[0020] Figure 4 It is a three-dimensional structure of the composite oil tank lower skin forming die Figure 3 .

[0021] Figure 6 It is a three-dimensional structure diagram of each lower mold plate spliced together.

[0022] Figure 5 It is Figure 7 the local enlarged view of A in the middle.

[0023] Figure 8 It is a three-dimensional structure diagram when each lower mold plate is fixedly connected on the lower side of the middle insert block.

[0024] Figure 1 It is a three-dimensional structure diagram of the dismounting part in the present application.

[0025] The figure label: 1 lower skin, 2 left block, 3 fastening bolt, 4 front block, 401 second front connecting hole, 402 second front positioning hole, 5 right block, 6 second right lower die plate, 601 second right lower connecting counterbore, 7 first intermediate lower die plate, 701 first intermediate connecting counterbore, 8 second intermediate lower die plate, 801 second intermediate connecting counterbore, 9 second left lower die plate, 901 second left lower connecting counterbore, 10 first left lower die plate, 1001 first left lower connecting counterbore, 11 front positioning pin, 12 first right lower die plate, 1201 first right lower connecting counterbore, 13 front lifting lug, 14 first intermediate positioning pin, 15 intermediate block, 1501 first front connecting hole, 1502 second front positioning hole, 1503 right connecting hole, 1504 first rear positioning hole, 16 first left lower positioning pin, 17 intermediate lifting lug, 18 left lifting lug, 19 second left lower positioning pin, 20 second intermediate positioning pin, 21 rear lifting lug, 22 right lifting lug, 23 second right lower positioning pin, 24 first right lower positioning pin, 25 rear block, 2501 second rear connecting hole, 2502 second rear positioning hole, 26 rear positioning pin, 27 right positioning pin, 28 dismounting piece, 2801 grabbing part, 2802 dismounting part, 29 left positioning pin, X plug-in counterbore, S plug-in hole. DETAILED DESCRIPTION

[0026] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0027] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from the description, and those skilled in the art can make similar generalizations without departing from the content of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0028] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or mutually exclusive with other embodiments.

[0029] Embodiment one:

[0030] Reference Figure 3 , Figure 5 , Figure 7 and Figures 1-4For the first embodiment of the utility model, this embodiment provides a composite material oil tank lower skin forming die, including the intermediate insert block 15 with upward opening, the left part of the lower side of the intermediate insert block 15 is detachably connected with the first left lower template 10 and the second left lower template 9 that are pasted together in front-back direction, the lower side of the intermediate insert block 15 of the right side of the first left lower template 10 is detachably connected with the first intermediate lower template 7, the lower side of the intermediate insert block 15 of the right side of the second left lower template 9 is detachably connected with the second intermediate lower template 8, the lower side of the intermediate insert block 15 of the right side of the first intermediate lower template 7 is detachably connected with the first right lower template 12, the lower side of the intermediate insert block 15 of the right side of the second intermediate lower template 8 is detachably connected with the second right lower template 6, the left side of the intermediate insert block 15 is detachably connected with the left insert block 2 on the upside of the first left lower template 10, and the right side of the intermediate insert block 15 is detachably connected with the right insert block 5 on the upside of the first right upper template.

[0031] When processing, the material sheet is laid along the periphery of the intermediate insert block 15 and the periphery of each spliced lower template, and after the material sheet laying is finished, the next forming process is carried out.

[0032] Specifically, the first left lower template 10 has a plurality of first left lower positioning counterbores and first left lower connecting counterbores 1001 at one end facing upward, the first left lower template 10 is inserted with first left lower positioning pins 16 through the first left lower positioning counterbores, the bottom plate of the middle insert 15 has a plurality of first left lower positioning holes corresponding to the first left lower positioning counterbores and first left lower connecting holes corresponding to the first left lower connecting counterbores 1001, and the middle insert 15 is sleeved on the corresponding first left lower positioning pins 16 through the first left lower positioning holes; the second left lower template 9 has a plurality of second left lower positioning counterbores and second left lower connecting counterbores 901 at one end facing upward, the second left lower template 9 is inserted with second left lower positioning pins 19 through the second left lower positioning counterbores, the bottom plate of the middle insert 15 has a plurality of second left lower positioning holes corresponding to the second left lower positioning counterbores and second left lower connecting holes corresponding to the second left lower connecting counterbores 901, and the middle insert 15 is sleeved on the corresponding second left lower positioning pins 19 through the second left lower positioning holes; the first middle lower template 7 has a plurality of first middle positioning counterbores and first middle connecting counterbores 701 at one end facing upward, the first middle lower template 7 is inserted with first middle positioning pins 14 through the first middle positioning counterbores, the bottom plate of the middle insert 15 has a plurality of first middle positioning holes corresponding to the first middle positioning counterbores and first middle connecting holes corresponding to the first middle connecting counterbores 701, and the middle insert 15 is sleeved on the corresponding first middle positioning pins 14 through the first middle positioning holes; the second middle lower template 8 has a plurality of second middle positioning counterbores and second middle connecting counterbores 801 at one end facing upward, the second middle lower template 8 is inserted with second middle positioning pins 20 through the second middle positioning counterbores, the bottom plate of the middle insert 15 has a plurality of second middle positioning holes corresponding to the second middle positioning counterbores and second middle connecting holes corresponding to the second middle connecting counterbores 801, and the middle insert 15 is sleeved on the corresponding second middle positioning pins 20 through the second middle positioning holes; the first right lower template 12 has a plurality of first right lower positioning counterbores and first right lower connecting counterbores 1201 at one end facing upward, the first right lower template 12 is inserted with first right lower positioning pins 24 through the first right lower positioning counterbores, the bottom plate of the middle insert 15 has a plurality of first right lower positioning holes corresponding to the first right lower positioning counterbores and first right lower connecting holes corresponding to the first right lower connecting counterbores 1201, and the middle insert 15 is sleeved on the corresponding first right lower positioning pins 24 through the first right lower positioning holes; the second right lower template 6 has a plurality of second right lower positioning counterbores and second right lower connecting counterbores 601 at one end facing upward, the second right lower template 6 is inserted with second right lower positioning pins 23 through the second right lower positioning counterbores, the bottom plate of the middle insert 15 has a plurality of second right lower positioning holes corresponding to the second right lower positioning counterbores and second right lower connecting holes corresponding to the second right lower connecting counterbores 601, and the middle insert 15 is sleeved on the corresponding second right lower positioning pins 23 through the second right lower positioning holes.

[0033] When the lower mold plate is installed on the middle insert 15, the lower mold plates are spliced together according to the set splicing sequence, the angle of the middle insert 15 is adjusted, the first left lower positioning hole is aligned with the first left lower positioning pin 16, the second left lower positioning hole is aligned with the second left lower positioning pin 19, the first middle positioning hole is aligned with the first middle positioning pin 14, the second middle positioning hole is aligned with the second middle positioning pin 20, the first right lower positioning hole is aligned with the first right lower positioning pin 24, and the second right lower positioning hole is aligned with the second right lower positioning pin 23, the bottom plate of the middle insert 15 is sleeved on the corresponding positioning pin through the corresponding lower positioning hole, the middle insert 15 abuts on the upper side of each lower mold plate, the preliminary positioning of the middle insert 15 and each lower mold plate is realized, the fastening bolt 3 is screwed into the first left lower connecting hole and the first left lower connecting counterbore 1001 from top to bottom, the fixed connection of the first left lower mold plate 10 and the middle insert 15 is realized, the fastening bolt 3 is screwed into the second left lower connecting hole and the second left lower connecting counterbore 901 from top to bottom, the fixed connection of the second left lower mold plate 9 and the middle insert 15 is realized, the fastening bolt 3 is screwed into the first middle connecting hole and the first middle connecting counterbore 701 from top to bottom, the fixed connection of the first middle lower mold plate 7 and the middle insert 15 is realized, the fastening bolt 3 is screwed into the second middle connecting hole and the second middle connecting counterbore 801 from top to bottom, the fixed connection of the second middle lower mold plate 8 and the middle insert 15 is realized, the fastening bolt 3 is screwed into the first right lower connecting hole and the first right lower connecting counterbore 1201 from top to bottom, the fixed connection of the first right lower mold plate 12 and the middle insert 15 is realized, the fastening bolt 3 is screwed into the second right lower connecting hole and the second right lower connecting counterbore 601 from top to bottom, the fixed connection of the second right lower mold plate 6 and the middle insert 15 is realized, and the fixed connection of the middle insert 15 and each split lower mold plate is realized through the above steps, and the installation is convenient.

[0034] The top of the middle insert 15 is further connected with the middle lifting lug 17 which is convenient for lifting the middle insert 15.

[0035] When demolding, each fastening bolt 3 is loosened, the middle insert 15 is lifted upward through the middle lifting lug 17, and the separation of the middle insert 15 and each lower mold plate is realized.

[0036] Embodiment two:

[0037] Reference Figure 5 As a second embodiment of the utility model, the embodiment is based on the previous embodiment.

[0038] Specifically, the front and rear ends of the middle insert 15 are respectively provided with a first front positioning hole 1502 and a first rear positioning hole, the first front positioning hole 1502 of the middle insert 15 is connected with a front positioning pin 11, the first rear positioning hole of the middle insert 15 is connected with a front positioning pin 11 and a rear positioning pin 26, the front side of the middle insert 15 is detachably connected with a front insert 4, the rear side of the middle insert 15 is detachably connected with a rear insert 25, the front insert 4 is provided with a plurality of second front positioning holes 402 corresponding to the front positioning pins 11, the rear insert 25 is provided with a plurality of second rear positioning holes 2502 corresponding to the rear positioning pins 26, the front insert 4 is sleeved on the corresponding front positioning pin 11 through the second front positioning hole 402, the rear insert 25 is sleeved on the corresponding rear positioning pin 26 through the second rear positioning hole 2502, the front end and the rear end of the middle insert 15 are respectively provided with a plurality of first front connecting holes 1501 and a plurality of first rear connecting holes, the front insert 4 is provided with a plurality of second front connecting holes 401 corresponding to the first front connecting holes 1501, and the rear insert 25 is provided with a plurality of second rear connecting holes 2501 corresponding to the first rear connecting holes.

[0039] Through the arrangement of the front and rear inserts 25, the laying of the material sheet of the front and rear end faces of the lower skin 1 is further facilitated, the shapes of the front and rear inserts 25 outward are arranged according to the shapes of the front and rear end faces of the lower skin 1; when the front insert 4 is installed on the middle insert 15, the front insert 4 is sleeved on the corresponding front positioning pin 11 through the second front positioning hole 402, preliminary positioning of the front insert 4 and the middle insert 15 before connection is realized, the rear side of the front insert 4 abuts against the front side of the middle insert 15, the fastening bolts 3 are sequentially screwed into the first front connecting holes 1501 and the corresponding second front connecting holes 401 from front to back, and the fixed connection of the front insert 4 and the middle insert 15 is realized; when the rear insert 25 is installed on the middle insert 15, the rear insert 25 is sleeved on the corresponding rear positioning pin 26 through the second rear positioning hole 2502, preliminary positioning of the rear insert 25 and the middle insert 15 after connection is realized, the rear side of the rear insert 25 abuts against the rear side of the middle insert 15, the fastening bolts 3 are sequentially screwed into the first rear connecting holes and the corresponding second rear connecting holes 2501 from back to back, and the fixed connection of the rear insert 25 and the middle insert 15 is realized; when demolding, the front positioning pins 11 and the rear positioning pins 26 are taken out from the opening, each fastening bolt 3 is unscrewed, the middle insert 15 is lifted, and then the front insert 4 and the rear insert 25 are taken out.

[0040] The top of the front insert 4 is connected with a plurality of front lifting lugs 13 for conveniently lifting the front insert 4 upward, and the top of the rear insert 25 is connected with a plurality of rear lifting lugs 21 for conveniently lifting the rear insert 25 upward.

[0041] Specifically, the left and right ends of the middle insert 15 are respectively connected with a plurality of left positioning pins 29 and right positioning pins 27, the left side of the middle insert 15 is detachably connected with the left insert 2, the right side of the middle insert 15 is detachably connected with the right insert 5, a plurality of left positioning counterbores corresponding to the left positioning pins 29 are formed on the left insert 2, a plurality of right positioning counterbores corresponding to the right positioning pins 27 are formed on the right insert 5, the left insert 2 is sleeved on the corresponding left positioning pin 29 through the left positioning counterbores, the right insert 5 is sleeved on the corresponding right positioning pin 27 through the right positioning counterbores, a plurality of left connecting holes and a plurality of right connecting holes 1503 are formed on the left and right ends of the middle insert 15, a plurality of left connecting counterbores corresponding to the left connecting holes are formed on the left insert 2, a plurality of right connecting counterbores corresponding to the right connecting holes 1503 are formed on the right insert 5, a plurality of left lifting lugs 18 for conveniently lifting the left insert 2 upward are connected to the top of the left insert 2, a plurality of right lifting lugs 22 for conveniently lifting the right insert 5 upward are connected to the top of the right insert 5.

[0042] Through the arrangement of the left insert 2 and the right insert 5, the laying of the material sheet forming the left and right end faces of the lower skin 1 is further facilitated, and the outward shape of the left insert 2 and the right insert 5 is arranged according to the shape of the left and right end faces of the lower skin 1; when the left insert 2 is installed on the middle insert 15, the left insert 2 is sleeved on the corresponding left positioning pin 29 through the left positioning counterbores, thereby achieving the initial positioning of the left insert 2 and the middle insert 15, and the right side of the left insert 2 abuts against the left side of the middle insert 15; the fastening bolts 3 are sequentially screwed into the left connecting holes and the corresponding left connecting counterbores from right to left, thereby achieving the fixed connection of the left insert 2 and the middle insert 15; when the right insert 5 is installed on the middle insert 15, the right insert 5 is sleeved on the corresponding right positioning pin 27 through the right positioning counterbores, thereby achieving the initial positioning of the right insert 5 and the middle insert 15, and the left side of the right insert 5 abuts against the right side of the middle insert 15; the fastening bolts 3 are sequentially screwed into the right connecting holes 1503 and the corresponding right connecting counterbores from right to left, thereby achieving the fixed connection of the right insert 5 and the middle insert 15; when demolding, the left positioning pins 29 and the right positioning pins 27 are taken out from the opening, each fastening bolt 3 is unscrewed, the middle insert 15 is lifted, and then the left insert 2 and the right insert 5 are taken out, thereby facilitating demolding.

[0043] When demolding, the middle insert 15 is taken out first, then the front insert 4, the rear insert 25, the left insert 2 and the right insert 5 are lifted out, and finally each lower mold plate is taken out; before taking out the lower mold plate, the six lifting lugs are sequentially screwed into the first left lower connecting counterbores 1001, the second left lower connecting counterbores 901, the first middle connecting counterbores 701, the second middle connecting counterbores 801, the first right lower connecting counterbores 1201 and the second right lower connecting counterbores 601, and then the corresponding lower mold plate is sequentially taken out through the lifting lugs, thereby achieving complete demolding and facilitating demolding.

[0044] Embodiment three:

[0045] ReferenceFigure 6 、 Figure 8 and ​ , the third embodiment of the utility model, which is based on the first two embodiments.

[0046] Specifically, it also includes a dismounting piece 28 for conveniently taking out each positioning pin, each positioning pin has the same structure, and a non-circular insertion hole S is formed at one end of the positioning pin facing the opening, a circular insertion groove X is formed on the positioning pin inside the insertion hole S, and the outer diameter of the insertion groove X is the same as that of the circular arc segment of the insertion hole S; the dismounting piece 28 includes a grabbing part 2801 for convenient hand grabbing, one end of the grabbing part 2801 in the axial direction is fixed with a dismounting part 2802, the dismounting part 2802 can be inserted into the insertion groove X of the corresponding positioning pin along the insertion hole S, and the grabbing part 2801 can rotate on the insertion hole S.

[0047] When the corresponding positioning pin needs to be taken out from the insert block, the dismounting piece 28 is inserted into the insertion groove X along the insertion hole S, the dismounting piece 28 is rotated, the dismounting part 2802 is abutted on the positioning pin inside the insertion hole S, and the grabbing part 2801 is pulled, so that the positioning pin can be pulled out of the corresponding insert block, and the separation of the middle insert block 15 and the front insert block 4, the rear insert block 25, the left insert block 2 and the right insert block 5 is further facilitated.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model and are not limited. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the utility model, and all should be covered in the scope of the claims of the utility model.

Claims

1. A composite material fuel tank lower skin forming tool, characterized by: The invention relates to a die set, comprising an intermediate insert (15) with an upward opening, a first left lower die plate (10) and a second left lower die plate (9) detachably connected to the left side of the lower side of the intermediate insert (15) in a front-to-back direction, a first intermediate lower die plate (7) detachably connected to the lower side of the intermediate insert (15) on the right side of the first left lower die plate (10), a second intermediate lower die plate (8) detachably connected to the lower side of the intermediate insert (15) on the right side of the second left lower die plate (9), a first right lower die plate (12) detachably connected to the lower side of the intermediate insert (15) on the right side of the first intermediate lower die plate (7), a second right lower die plate (6) detachably connected to the lower side of the intermediate insert (15) on the right side of the second intermediate lower die plate (8), a left insert (2) detachably connected to the upper side of the first left lower die plate (10) on the left side of the intermediate insert (15), and a right insert (5) detachably connected to the upper side of the first right upper die plate on the right side of the intermediate insert (15).

2. The composite oil tank lower skin forming tooling of claim 1, wherein: The first left lower die plate (10) is provided with a plurality of first left lower positioning counterbores and first left lower connecting counterbores (1001) at one end thereof facing upward, the first left lower die plate (10) is inserted with first left lower positioning pins (16) through the first left lower positioning counterbores, the bottom plate of the intermediate insert (15) is provided with a plurality of first left lower positioning holes corresponding to the first left lower positioning counterbores and first left lower connecting holes corresponding to the first left lower connecting counterbores (1001), and the intermediate insert (15) is sleeved on the corresponding first left lower positioning pins (16) through the first left lower positioning holes.

3. The composite oil tank lower skin forming tooling of claim 1, wherein: The second left lower die plate (9) is provided with a plurality of second left lower positioning counterbores and second left lower connecting counterbores (901) at one end thereof facing upward, the second left lower die plate (9) is inserted with second left lower positioning pins (19) through the second left lower positioning counterbores, the bottom plate of the intermediate insert (15) is provided with a plurality of second left positioning holes corresponding to the second left lower positioning counterbores and second left lower connecting holes corresponding to the second left lower connecting counterbores (901), and the intermediate insert (15) is sleeved on the corresponding second left lower positioning pins (19) through the second left positioning holes.

4. The composite oil tank lower skin forming tooling of Claim 1, wherein: The first intermediate lower die plate (7) is provided with a plurality of first intermediate positioning counterbores and first intermediate connecting counterbores (701) at one end thereof facing upward, the first intermediate lower die plate (7) is inserted with first intermediate positioning pins (14) through the first intermediate positioning counterbores, the bottom plate of the intermediate insert (15) is provided with a plurality of first intermediate positioning holes corresponding to the first intermediate positioning counterbores and first intermediate connecting holes corresponding to the first intermediate connecting counterbores (701), and the intermediate insert (15) is sleeved on the corresponding first intermediate positioning pins (14) through the first intermediate positioning holes.

5. The composite material fuel tank lower skin molding die as described in claim 1, characterized in that: The second intermediate lower die plate (8) has a plurality of second intermediate positioning sink holes and second intermediate connecting sink holes (801) at its upward end, the second intermediate lower die plate (8) is inserted with second intermediate positioning pins (20) through the second intermediate positioning sink holes, the bottom plate of the intermediate insert block (15) has a plurality of second intermediate positioning holes corresponding to the second intermediate positioning sink holes and second intermediate connecting holes corresponding to the second intermediate connecting sink holes (801), and the intermediate insert block (15) is sleeved on the corresponding second intermediate positioning pins (20) through the second intermediate positioning holes.

6. The composite oil tank lower skin forming tooling of Claim 1, wherein: The first right lower die plate (12) has a plurality of first right lower positioning sink holes and first right lower connecting sink holes (1201) at its upward end, the first right lower die plate (12) is inserted with first right lower positioning pins (24) through the first right lower positioning sink holes, the bottom plate of the intermediate insert block (15) has a plurality of first right lower positioning holes corresponding to the first right lower positioning sink holes and first right lower connecting holes corresponding to the first right lower connecting sink holes (1201), and the intermediate insert block (15) is sleeved on the corresponding first right lower positioning pins (24) through the first right lower positioning holes.

7. The composite oil tank lower skin forming tooling of Claim 1, wherein: The second right lower die plate (6) has a plurality of second right lower positioning sink holes and second right lower connecting sink holes (601) at its upward end, the second right lower die plate (6) is inserted with second right lower positioning pins (23) through the second right lower positioning sink holes, the bottom plate of the intermediate insert block (15) has a plurality of second right lower positioning holes corresponding to the second right lower positioning sink holes and second right lower connecting holes corresponding to the second right lower connecting sink holes (601), and the intermediate insert block (15) is sleeved on the corresponding second right lower positioning pins (23) through the second right lower positioning holes.

8. The composite oil tank lower skin forming tooling of any one of claims 1-7, wherein: The intermediate insert block (15) is connected with a plurality of front positioning pins (11) and rear positioning pins (26) at its front and rear ends respectively, the front side of the intermediate insert block (15) is detachably connected with a front insert block (4), the rear side of the intermediate insert block (15) is detachably connected with a rear insert block (25), the front insert block (4) has a plurality of second front positioning holes (402) corresponding to the front positioning pins (11) one by one, the rear insert block (25) has a plurality of second rear positioning holes (2502) corresponding to the rear positioning pins (26) one by one, the front insert block (4) is sleeved on the corresponding front positioning pins (11) through the second front positioning holes (402), the rear insert block (25) is sleeved on the corresponding rear positioning pins (26) through the second rear positioning holes (2502), the front end and the rear end of the intermediate insert block (15) have a plurality of first front connecting holes (1501) and a plurality of first rear connecting holes respectively, the front insert block (4) has a plurality of second front connecting holes (401) corresponding to the first front connecting holes (1501) one by one, and the rear insert block (25) has a plurality of second rear connecting holes (2501) corresponding to the first rear connecting holes one by one.

9. The composite oil tank lower skin forming tooling of any one of claims 1-7, wherein: The left and right ends of the middle insert block (15) are respectively connected with a plurality of left positioning pins (29) and right positioning pins (27), the left side of the middle insert block (15) is detachably connected with a left insert block (2), the right side of the middle insert block (15) is detachably connected with a right insert block (5), a plurality of left positioning counterbores corresponding to the left positioning pins (29) are formed on the left insert block (2), a plurality of right positioning counterbores corresponding to the right positioning pins (27) are formed on the right insert block (5), the left insert block (2) is sleeved on the corresponding left positioning pin (29) through the left positioning counterbores, the right insert block (5) is sleeved on the corresponding right positioning pin (27) through the right positioning counterbores, a plurality of left connecting holes and a plurality of right connecting holes (1503) are formed on the left and right ends of the middle insert block (15), a plurality of left connecting counterbores corresponding to the left connecting holes are formed on the left insert block (2), a plurality of right connecting counterbores corresponding to the right connecting holes (1503) are formed on the right insert block (5).

10. The composite oil tank lower skin forming tooling of claim 8, wherein: The structure of each positioning pin is the same, a non-circular insertion hole (S) is formed on the end of the positioning pin facing the opening, a circular insertion counter-sink (X) is formed on the inside of the insertion hole (S), the outer diameter of the insertion counter-sink (X) is the same as that of the circular arc segment of the insertion hole (S).

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