Composite material oil tank upper skin forming mold

Abstract

The utility model discloses a composite material oil tank upper skin forming die, which relates to the technical field of tools, and comprises a lower die, an upper die is arranged above the lower die, a support seat is arranged between the lower die and the upper die, a bottom frame is inserted in the lower die, and the size of the bottom frame is matched with the inner diameter of the lower die. A jacking mechanism is arranged in the lower mold; the jacking mechanism comprises a sleeve fixed to the inner wall of the lower die, a spring is fixed to the inner wall of the sleeve, a jacking plate is fixed to the top of the spring, and a sealing groove is formed in the top of the sleeve. The mold has the advantages that the lifting mechanism is arranged, after the upper skin of the composite oil tank is formed and cooled and when the upper mold and the lower mold are separated, the formed upper skin can be automatically ejected out of the lower mold, workers can easily take the upper skin out of the lower mold conveniently, meanwhile, the workers can complete demolding without any tool, and the production efficiency is improved. And the outer surface of the upper skin cannot be damaged.

Description

TECHNICAL FIELD

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

[0002] The upper skin of the oil tank refers to the covering piece above the oil tank, which is usually used to protect the oil tank from the external environment. The design and manufacture of the upper skin of the oil tank need to consider various factors, including material selection, structural design, manufacturing process, etc. At present, the upper skin of the oil tank is made of composite material by die casting. Composite material has been widely used due to its excellent weight reduction effect, high specific strength and excellent fatigue resistance, and has become an important lightweight structural material in the field of aerospace.

[0003] After the upper skin of the oil tank is formed by die casting, it needs to be taken out from the mold. However, the upper skin of the oil tank after cooling is tightly attached to the mold, and it is not easy for the staff to find the gap between the upper skin and the mold when they want to take it out, which makes it difficult to take out the formed upper skin, affects the processing efficiency of the upper skin of the oil tank, prolongs the production cycle, and also increases the labor intensity of the staff, which may cause fatigue. In the process of taking off the skin, if improper methods or tools are used, the skin or mold may be damaged, for example, using sharp tools may scratch the surface of the skin, and excessive force may cause the mold to deform. SUMMARY

[0004] The purpose of this section is to outline some aspects of the embodiments of the present 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.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A composite material oil tank upper skin forming die, comprising a lower mold, an upper mold is arranged above the lower mold, a support seat is arranged between the lower mold and the upper mold, a chassis is inserted into the inside of the lower mold, the size of the chassis is matched with the inner diameter of the lower mold, and a jacking mechanism is arranged in the inside of the lower mold.

[0007] As a preferred scheme of the composite material oil tank upper skin forming die of the utility model, the inside of the spring is provided with a damping seat, and the damping seat is fixed to the inner wall of the sleeve.

[0008] As a preferred embodiment of the composite material oil tank upper skin forming mold of the present invention, wherein: a damping rod is slidably connected to the inner wall of the damping seat, and the damping rod is fixed to the bottom of the lifting plate.

[0009] As a preferred embodiment of the composite material oil tank skin forming mold of the present invention, wherein: a limiting plate is fixed at the bottom of the damping rod, and the limiting plate is slidably connected to the inner wall of the damping seat.

[0010] As a preferred embodiment of the composite material oil tank upper skin forming mold of the present invention, the inner walls of the lower mold and the support base are both provided with a first threaded hole, and the inner wall of the first threaded hole is threaded with a lifting lug.

[0011] As a preferred embodiment of the composite material oil tank skin forming mold of the present invention, the number of the first threaded hole and the lifting lug are both set to four, and the size of the lifting lug is adapted to the inner diameter of the first threaded hole.

[0012] As a preferred embodiment of the composite material oil tank upper skin forming mold of the present invention, the inner walls of the lower mold and the support base are both provided with second threaded holes, the number of the second threaded holes is set to three, and the three second threaded holes are equidistantly arranged.

[0013] As a preferred embodiment of the composite material oil tank upper skin forming mold of the present invention, the inner walls of the lower mold and the support base are provided with locking holes, the number of locking holes is set to two, and they are symmetrical.

[0014] As a preferred embodiment of the composite material oil tank skin forming mold of the present invention, wherein: the inner wall of the second threaded hole is threaded with an internal hexagon bolt, the number of the internal hexagon bolts is set to three, and the size of the internal hexagon bolts is adapted to the inner diameter of the second threaded hole.

[0015] As a preferred embodiment of the composite material oil tank skin forming mold of the present invention, wherein: a locking pin is inserted into the inner wall of the locking hole, the number of the locking pin is set to two, and the size of the locking pin is adapted to the inner diameter of the locking hole.

[0016] The beneficial effects of this utility model are as follows: by setting up a lifting mechanism, after the upper skin of the composite material oil tank is formed and cooled, when the upper and lower molds are separated, the formed upper skin can automatically pop out from the lower mold, so that the upper skin and the lower mold are separated, making it easy for the staff to take the upper skin out of the lower mold, improving work efficiency, shortening the production cycle, and making the operation simple and convenient. At the same time, the staff can complete the demolding without the aid of any tools, and will not damage the outer surface of the upper skin. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Fig. 1 This is an overall structural diagram of the molding die for the skin of a composite fuel tank.

[0019] Fig. 2 This is an exploded view of the molding die for the skin of a composite fuel tank.

[0020] Fig. 3 This is the second exploded view of the molding die for the skin of the composite fuel tank.

[0021] Fig. 4 This is a structural diagram of the upper mold lifting mechanism for the composite material fuel tank upper skin forming mold.

[0022] Fig. 5 This is a structural diagram of the lifting mechanism of the molding die for the skin of a composite fuel tank.

[0023] Fig. 6 This is a diagram showing the internal structure of the damping seat of the molding die for the skin of a composite material fuel tank.

[0024] The following are the labels in the diagram: 1. Lower mold; 2. Upper mold; 3. Support base; 4. Base frame; 5. Lifting mechanism; 51. Sleeve; 52. Spring; 53. Lifting plate; 54. Sealing groove; 55. Damping seat; 56. Damping rod; 57. Limiting plate; 6. First threaded hole; 7. Lifting lug; 8. Second threaded hole; 9. Locking hole; 10. Hex socket head cap screw; 11. Locking pin. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0028] Example 1:

[0029] Reference Figs. 1-6 This is the first embodiment of the present utility model. This embodiment provides a molding die for the upper skin of a composite material fuel tank, including a lower die 1, an upper die 2 above the lower die 1, a support base 3 between the lower die 1 and the upper die 2, a base frame 4 inserted into the lower die 1, the size of the base frame 4 being adapted to the inner diameter of the lower die 1, and a lifting mechanism 5 being provided inside the lower die 1.

[0030] By die-casting with the cooperation of the lower mold 1 and the upper mold 2, composite materials can be die-cast to form the upper skin of the fuel tank. Composite materials are increasingly widely used due to their excellent weight reduction effect, high specific strength and excellent fatigue resistance, and have become an important lightweight structural material in the aerospace field. The support seat 3 is installed on the top of the lower mold 1 to form an integral upper skin mold for the fuel tank. Under the die-casting of the upper mold 2, the upper skin is formed. The support seat 3 is detachable. The base frame 4 is installed inside the lower mold 1 to improve the stability of the lower mold 1. By setting the lifting mechanism 5, the formed upper skin can be automatically lifted from the lower mold 1 the moment the upper mold 2 is lifted after the upper skin die-casting is completed, making it easy for workers to remove it.

[0031] The lifting mechanism 5 includes a sleeve 51 fixed to the inner wall of the lower mold 1, a spring 52 fixed to the inner wall of the sleeve 51, a lifting plate 53 fixed to the top of the spring 52, a sealing groove 54 opened on the top of the sleeve 51, and the lifting plate 53 snapped into the inner wall of the sealing groove 54.

[0032] The sleeve 51 is fixed to the inner wall of the lower mold 1. The lowest point of the sleeve 51 is flush with the bottom of the lower mold 1. The spring 52 is fixed inside the sleeve 51. The top of the spring 52 is fixed with a lifting plate 53. When the lifting plate 53 is squeezed by the upper mold 2, it can drive the spring 52 to contract inside the sleeve 51. When demolding, the upper mold 2 rises, and the lifting plate 53 is pushed upward by the elastic force of the spring 52, lifting the upper skin of the die-cast oil tank inside the lower mold 1, making it easy for workers to remove.

[0033] Example 2:

[0034] Reference Figs. 5-6 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0035] Specifically, a damping seat 55 is provided inside the spring 52, and the damping seat 55 is fixed to the inner wall of the sleeve 51.

[0036] A damping seat 55 is provided inside the spring 52 and is fixed to the inner wall of the sleeve 51. The damping seat 55 allows the damping rod 56 to slide up and down inside it.

[0037] Specifically, a damping rod 56 is slidably connected to the inner wall of the damping seat 55, and the damping rod 56 is fixed to the bottom of the lifting plate 53.

[0038] The damping rod 56 is fixed to the bottom of the lifting plate 53. When the lifting plate 53 moves down and squeezes the spring 52, it will drive the damping rod 56 to slide in the damping seat 55, which will improve the stability of the extension and contraction of the spring 52, and thus improve the stability of the upper skin being lifted during demolding.

[0039] Specifically, a limiting plate 57 is fixed to the bottom of the damping rod 56, and the limiting plate 57 is slidably connected to the inner wall of the damping seat 55.

[0040] The limiting plate 57 is fixed to the bottom end of the damping rod 56. When the damping rod 56 slides in the damping seat 55, the limiting plate 57 can limit the sliding of the damping rod 56, so that the lifting height of the lifting plate 53 is determined.

[0041] Example 3:

[0042] Reference Figs. 1-4 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0043] Specifically, the inner walls of both the lower mold 1 and the support base 3 are provided with first threaded holes 6, and the inner walls of the first threaded holes 6 are threaded with lifting lugs 7.

[0044] The lifting lug 7 can be installed by setting the first threaded hole 6. By installing the lifting lug 7 on the lower mold 1 and the support base 3, it is easy to assemble and connect with other equipment.

[0045] Specifically, the number of the first threaded hole 6 and the lifting lug 7 are both set to four, and the size of the lifting lug 7 is adapted to the inner diameter of the first threaded hole 6.

[0046] The number of first threaded holes 6 and lifting lugs 7 is set to four, with two in one position and the other two in the opposite position. The size of the lifting lugs 7 is adapted to the inner diameter of the first threaded holes 6, so that the lifting lugs 7 are more stable after installation and will not loosen.

[0047] Specifically, the inner walls of both the lower mold 1 and the support base 3 are provided with second threaded holes 8, and the number of second threaded holes 8 is set to three, with the three second threaded holes 8 spaced apart.

[0048] The second threaded hole 8 is used to install the internal hex bolt 10. The second threaded holes 8 on the lower mold 1 and the support base 3 are aligned so that the internal hex bolt 10 can be screwed into the second threaded hole 8, and the lower mold 1 and the support base 3 can be assembled and fixed.

[0049] Specifically, the inner walls of both the lower mold 1 and the support base 3 are provided with two locking holes 9, which are arranged symmetrically.

[0050] The locking hole 9 is used to insert the locking pin 11. The locking holes 9 on the lower mold 1 and the support base 3 are aligned so that the inner locking pin 11 can be inserted into the locking hole 9. The lower mold 1 and the support base 3 can be aligned and connected. After connection, they are fixed by the internal hex bolt 10.

[0051] Specifically, the inner wall of the second threaded hole 8 is threaded with three hexagon socket head cap screws 10, and the size of the hexagon socket head cap screws 10 is adapted to the inner diameter of the second threaded hole 8.

[0052] The size of the internal hex bolt 10 is matched with the inner diameter of the second threaded hole 8, which makes the connection and fixation of the lower mold 1 and the support base 3 more stable after assembly, and will not loosen, so there will be no die casting misalignment.

[0053] Specifically, the inner wall of the card hole 9 is fitted with two locking pins 11, and the size of the locking pins 11 is adapted to the inner diameter of the card hole 9.

[0054] The size of the locking pin 11 is matched with the inner diameter of the locking hole 9. The lower mold 1 and the support base 3 are aligned and connected by the locking pin 11, so that the upper skin mold will not have errors, thereby improving the accuracy of the die casting of the upper skin of the oil tank.

[0055] During use, the operator places the lower mold 1 on the outside of the base frame 4. The lower mold 1 and the support base 3 are aligned and connected by the cooperation of the locking pin 11 and the locking hole 9. Then, the lower mold 1 and the support base 3 are fixed by screwing the hex bolt 10 into the second threaded hole 8. The lower mold 1 is fixed to other equipment by the lifting lug 7. The composite material is placed into the lower mold 1. The upper mold 2 is pressed down by the pneumatic die-casting device. The upper mold 2 presses down and squeezes the lifting plate 53 to move down, which drives the spring 52 to contract in the sleeve 51. The upper mold 2 and the lower mold 1 work together to die-cast the composite material to form the upper skin of the oil tank. After the upper skin cools down, the upper mold 2 is moved up by the pneumatic die-casting device. At this time, the lifting plate 53 is pushed up by the elastic force of the spring 52, lifting the upper skin of the oil tank that has been die-cast in the lower mold 1, making it easy for the operator to remove.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A molding die for the upper skin of a composite material fuel tank, comprising a lower die (1), characterized in that: An upper mold (2) is provided above the lower mold (1), a support base (3) is provided between the lower mold (1) and the upper mold (2), a base frame (4) is inserted into the lower mold (1), the size of the base frame (4) is adapted to the inner diameter of the lower mold (1), and a lifting mechanism (5) is provided inside the lower mold (1). The lifting mechanism (5) includes a sleeve (51) fixed to the inner wall of the lower mold (1), a spring (52) fixed to the inner wall of the sleeve (51), a lifting plate (53) fixed to the top of the spring (52), a sealing groove (54) opened on the top of the sleeve (51), and the lifting plate (53) snapped into the inner wall of the sealing groove (54).

2. The composite material fuel tank upper skin forming mold as described in claim 1, characterized in that: The spring (52) has a damping seat (55) inside, and the damping seat (55) is fixed to the inner wall of the sleeve (51).

3. The composite material fuel tank upper skin forming mold as described in claim 2, characterized in that: The inner wall of the damping seat (55) is slidably connected to a damping rod (56), which is fixed to the bottom of the lifting plate (53).

4. The composite material fuel tank upper skin forming mold as described in claim 3, characterized in that: The bottom of the damping rod (56) is fixed with a limiting plate (57), which is slidably connected to the inner wall of the damping seat (55).

5. The composite material fuel tank upper skin forming mold as described in claim 1, characterized in that: The inner walls of the lower mold (1) and the support base (3) are provided with first threaded holes (6), and the inner walls of the first threaded holes (6) are threaded with lifting lugs (7).

6. The composite material fuel tank upper skin forming mold as described in claim 5, characterized in that: The number of the first threaded hole (6) and the lifting lug (7) is set to four, and the size of the lifting lug (7) is adapted to the inner diameter of the first threaded hole (6).

7. The composite material fuel tank upper skin forming mold as described in claim 1, characterized in that: The inner walls of the lower mold (1) and the support base (3) are provided with second threaded holes (8), and the number of second threaded holes (8) is set to three, with the three second threaded holes (8) being equidistant.

8. The composite material fuel tank upper skin forming mold as described in claim 1, characterized in that: The inner walls of the lower mold (1) and the support base (3) are provided with locking holes (9), and the number of locking holes (9) is set to two, and they are symmetrical.

9. The composite material fuel tank upper skin forming mold as described in claim 7, characterized in that: The inner wall of the second threaded hole (8) is threaded with an internal hexagon bolt (10), the number of which is set to three, and the size of the internal hexagon bolt (10) is adapted to the inner diameter of the second threaded hole (8).

10. The composite material fuel tank upper skin forming mold as described in claim 8, characterized in that: The inner wall of the card hole (9) is fitted with a locking pin (11), and the number of the locking pins (11) is set to two, and the size of the locking pins (11) is adapted to the inner diameter of the card hole (9).

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