Columnar pressure-resistant case made of composite material having an internally reinforced metal annular rib, its processing apparatus, and processing method

Abstract

The present invention discloses a composite columnar pressure case with a metal ring-shaped rib lining, which includes a composite columnar casing and a plurality of metal ring-shaped ribs. The processing device of the columnar pressure case includes a heating device, a bracket, a driving device, a split mold and an aluminum film, the split mold is installed between two metal ring-shaped ribs, and a columnar outer wall is formed on the outer wall surface of the split mold, the metal ring-shaped rib and the aluminum film, the heating device is used for heating the composite layer after it is installed on the columnar outer wall, the split mold includes a plurality of alternating first and second mold plates, and the driving device drives the first and second mold plates to contract, separate from the metal ring-shaped rib and separate from the composite columnar casing. The composite column case is reinforced with the metal ring-shaped rib lining, which can improve the brittle defects of the material and greatly increase the limit load. The processing device can support the split mold accurately and flexibly. It can be demolded quickly, which improves the processing efficiency.

Description

Technical Field

[0001] The present invention relates to a pressure-resistant device, and specifically to a columnar pressure-resistant case made of a composite material having an inner metal annular rib, a processing device thereof, and a processing method.

Background Art

[0002] The columnar pressure-resistant case made of a composite material has performance such as good specific strength, specific stiffness, fatigue resistance, and corrosion resistance, and is widely applied in fields such as aerospace flight, automobile manufacturing, ship and submarine design. Especially in navigation, due to its stable chemical properties, it can stably operate in seawater for a long time without being corroded, so it is applied to the design of the pressure-resistant chamber of submarines. For example, the patent application with the application number 201910248204.X in the prior art proposes a diver pressure-resistant chamber made of a carbon fiber composite material that can meet the requirements of a low exhaust volume / displacement ratio, high pressure-resistant strength, and stability, and can solve the problems that the interlayer strength of the laminated composite material is weak and it is easy to be pushed and laminated. Although the carbon fiber composite material has excellent mechanical properties, it belongs to a brittle material. This reinforcement structure cannot change the plasticity of the material, and it is easy to collapse when receiving a concentrated stress load. When the received load exceeds its limit load, the structure fails instantaneously.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Object of the invention: In view of the above disadvantages, the present invention provides a columnar pressure-resistant case made of a composite material having an inner metal annular rib that improves the brittle defect of the material and increases the limit load.

Means for Solving the Problems

[0004] The present invention further provides a processing device and a processing method for the columnar pressure-resistant case made of a composite material having the above inner metal annular rib.

[0005] Technical solution: To solve the above problems, the present invention provides a columnar pressure-resistant case made of a composite material with an internally-lined metal annular rib, which includes a columnar casing made of a composite material. A plurality of metal annular ribs are installed on the inner wall of the columnar casing made of a composite material, and the metal annular ribs are in close contact with the columnar casing made of a composite material. The columnar pressure-resistant case made of a composite material with an internally-lined metal annular rib is used.

[0006] Furthermore, two metal annular ribs are installed on the inner wall of the columnar casing made of a composite material.

[0007] A processing device for a columnar pressure-resistant case made of a composite material with an internally-lined metal annular rib, which includes a heating device, a bracket, a driving device, and a mold. The mold includes a split mold and an aluminum film. The split mold is installed between two metal annular ribs, and aluminum films are installed at the ends of the two metal annular ribs away from the split mold. The split mold, the metal annular rib, and the aluminum film are positioned by the bracket, and a columnar outer wall is formed on the outer wall surfaces of the split mold, the metal annular rib, and the aluminum film. The heating device is used to heat the composite material layer installed on the columnar outer wall to form a columnar casing made of a composite material. The split mold includes a plurality of alternately arranged first mold plates and second mold plates. The driving device drives the first mold plate and the second mold plate to contract, separate from the metal annular rib, and detach from the columnar casing made of a composite material.

[0008] Furthermore, the driving device includes a first driving unit, a second driving unit, and a screw joint device. The first mold plate and the second mold plate are both hinged to the screw joint device via links. The first driving unit drives the first mold plate to contract, and the second driving unit drives the second mold plate to contract. The first driving unit and the second driving unit are activated with a time shift.

[0009] Furthermore, the first driving unit includes a first driving motor, a first screw, and a first screw nut. The first driving motor is installed on a bracket. One end of the first screw is fixedly connected to the first driving motor, and the other end of the first screw is fixedly connected to a screw joint device. The first screw nut is installed on the first screw and is hinged to a link connected to the first mold plate via a driving rod. The first driving motor rotates to rotate the first screw, and the first screw rotates to move the first screw nut, thereby moving the first mold plate closer to or farther from the first screw. The second driving unit includes a second driving motor, a second screw, and a second screw nut. The second driving motor is installed on a bracket. One end of the second screw is fixedly connected to the second driving motor, and the other end of the second screw is fixedly connected to a screw joint device. The second screw nut is installed on the second screw and is hinged to a link connected to the second mold plate via a driving rod. The second driving motor rotates to rotate the second screw, and the second screw rotates to move the second screw nut, thereby moving the second mold plate closer to or farther from the second screw. The first screw and the second screw are located on the same straight line in the extending direction and rotate relatively independently.

[0010] When the first mold plate and the second mold plate are simultaneously contracted or expanded, the moving directions of the first screw nut and the second screw nut are the same.

[0011] Furthermore, matching stepped locking ports are installed on the contact surface between the first mold plate and the second mold plate. The stepped locking ports on both sides of the first mold plate are both located on the outside, and the stepped locking ports on both sides of the second mold plate are both located on the inside. The first driving unit is started earlier than the second driving unit, and the first driving unit and the second driving unit are stopped simultaneously.

[0012] Furthermore, the first mold plate and the second mold plate move to the first end of the columnar casing made of composite material during shrinkage. The longitudinal section of the metal annular rib near the first end of the columnar casing made of composite material is trapezoidal, and the outer trapezoidal bottom surface of the longitudinal section of the metal annular rib is longer than the inner trapezoidal bottom surface. The longitudinal sections of the first mold plate and the second mold plate are right trapezoids, and the hypotenuse of the right trapezoid matches the hypotenuse of the trapezoid of the longitudinal section of the metal annular rib.

[0013] The present invention is a processing method for a columnar pressure-resistant case made of composite material with an internal metal annular rib, comprising: (1) Assembling the processing device and installing the driving device, the mold and the metal annular rib on the bracket; (2) Driving the split mold so that the driving device unfolds, and forming a columnar outer wall on the outer wall surfaces of the split mold, the metal annular rib, and the aluminum film; (3) Winding a composite material around the columnar outer wall; (4) Heating and forming the composite material to form a columnar casing made of composite material; (5) Driving the split mold so that the driving device contracts, and realizing the separation of the split mold from the columnar casing made of composite material; (6) Removing the restriction of the bracket, detaching the aluminum film from the columnar casing made of composite material, and obtaining a columnar pressure-resistant case made of composite material with an internal metal annular rib.

[0014] In the heating chamber, the composite material is heated and formed. Before heating, the electronic device is removed, heated to the target temperature, kept warm for a while, then taken out of the heating chamber, air-cooled to room temperature, and then reinstalled and connected to the electronic device.

Advantages of the Invention

[0015] The beneficial effects are as follows. Compared with the prior art, the remarkable advantages of the present invention are as follows.

[0016] 1. The composite material column case is reinforced with an inner metal annular rib, which can improve the brittle defects of the material, significantly increase the limit load, and the inner metal annular rib is also beneficial for the arrangement of equipment.

[0017] 2. The processing device uses a combined method of two sets of link telescopic structures and can accurately and flexibly support the split mold. It can be demolded immediately after the processing of the composite material is completed, greatly shortening the processing time and improving the processing efficiency. 3. Adopt the mechanical limit structure of the locking port to fully guarantee the sealing performance of the column case mold. The split mold moves radially by the internal link telescopic structure. The link telescopic structure is combined by two screws and two deep groove ball bearings, and can be realized to freely expand and contract by combining the links with a "parallelogram structure", improving the manufacturing efficiency.

Brief Description of the Drawings

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Mode for Carrying Out the Invention

[0019] Example 1 As shown in FIG. 1, the columnar pressure-resistant case made of composite material with an internal metal annular rib in this example includes a columnar casing 5 made of composite material, and a plurality of metal annular ribs 14 are installed on the inner wall of the columnar casing made of composite material. The metal annular ribs 14 are in close contact with the columnar casing 5 made of composite material. In this example, two metal annular ribs 14 are installed, and the inside of the composite material column case is reinforced by the metal annular ribs, and the performance of the column case can be improved from all aspects by combining the composite material and the metal material.

[0020] Example 2 As shown in FIGS. 2 to 7, the processing apparatus for the columnar pressure-resistant case made of composite material with the inner metal annular rib in this embodiment mainly includes a mold support frame (bracket) 1, a heating device, a driving device, and a mold. The mold includes a split mold 6 and an aluminum film 4. The mold support frame 1 supports the metal annular rib 14 and the aluminum mold and plays a role in fixing the driving device.

[0021] The split mold is installed between two metal annular ribs 14, and aluminum films 4 are installed at the ends of the two metal annular ribs away from the split mold. The split mold 6, the metal annular rib 15, and the aluminum film 4 are positioned by the mold support frame, and a columnar outer wall is formed on the outer wall surfaces of the split mold 6, the metal annular rib 15, and the aluminum film 4. The heating device is used to heat after installing a composite material layer on the columnar outer wall to form a columnar casing made of composite material. The split mold 6 includes a plurality of alternately arranged first mold plates 61 and second mold plates 62. The driving device is used to drive the first mold plate 61 and the second mold plate 62 respectively to contract, separate from the metal annular rib 15, and detach from the columnar casing 5 made of composite material. The metal annular rib, the end aluminum mold, and the split mold sheet jointly support the processing of the composite material layer. The mold support frames on both sides support the mold and fix the internal screw joint device so as not to move in the axial direction.

[0022] The columnar casing made of composite material and the metal annular rib are completely in close contact. The cross-sections of the two middle metal annular ribs are slightly different. In order to eliminate the interference between the composite movement generated when the split mold contracts and the metal annular rib, the metal annular rib I14 on the movement direction side of the split mold is designed with a trapezoidal cross-section, and the other metal annular rib II15 uses the conventional rectangular cross-section. The cross-section of the split mold and the cross-section of the metal annular rib are suitable.

[0023] As shown in Fig. 8, the driving device includes a first driving unit, a second driving unit, and a screw joining device 11. The first mold plate 61 and the second mold plate 62 are both hinged to the screw joining device 11 via a link 7. The first driving unit drives the first mold plate to contract, and the second driving unit drives the second mold plate to contract. The first driving unit and the second driving unit are activated with a time shift.

[0024] The first driving unit includes a first driving motor 2, a first screw 9, and a first screw nut 13. It is installed on a bracket. One end of the first screw 9 is fixedly connected to the first driving motor, and the other end of the first screw is fixedly connected to the screw joining device. The first screw nut is installed on the first screw and is hinged to a link connected to the first mold plate via a driving rod. The first driving motor rotates to rotate the first screw, and the first screw rotates to move the first screw nut, thereby moving the first mold plate closer to or farther from the first screw. The second driving unit includes a second driving motor 16, a second screw 17, and a second screw nut 18. The second driving motor is installed on the bracket 1. One end of the second screw is fixedly connected to the second driving motor, and the other end of the second screw is fixedly connected to the screw joining device. The second screw nut is installed on the second screw and is hinged to the link 7 connected to the second mold plate via a driving rod 8. The second driving motor rotates to rotate the second screw, and the second screw rotates to move the second screw nut, thereby moving the second mold plate closer to or farther from the second screw. The first screw and the second screw are located on the same straight line in the extending direction and rotate relatively independently. When the first mold plate and the second mold plate contract or expand simultaneously, the moving directions of the first screw nut and the second screw nut are the same. The two sets of internal link telescopic structures can realize the same-direction movement by the rotation of the stepping motor shafts on both sides. The two stepping motors are activated respectively within a time difference of 3 s to realize the telescopic time difference of the two sets of split molds, making the telescopic of the split molds more flexible.

[0025] As shown in FIGS. 9 and 10, the two rolling bearings 10 inside the screw joining device 11 are each press-fitted into the inner hole, enabling the two screws to rotate independently without interfering with each other. The link moving device 3 converts the rotation generated by the stepping motor into the movement of the link moving device by combining a screw nut and a screw, and realizes the expansion and contraction of the split mold according to the two sets of link expansion and contraction structures.

[0026] As shown in FIGS. 11 to 13, matching stepped locking ports are installed on the contact surface between the first mold plate 61 and the second mold plate 62. The stepped locking ports on both sides of the first mold plate are both located on the outside, and the stepped locking ports on both sides of the second mold plate are both located on the inside. The split mold sheets are brought into close contact by the stepped mechanical structure, which is also beneficial for the complete opening of the split mold sheets. The first drive unit is started earlier than the second drive unit, and the first drive unit and the second drive unit are stopped simultaneously.

[0027] As shown in FIG. 14, the link and the split mold sheet are connected via a lock bolt, which makes the rotation more flexible, reduces friction, strengthens the connection between the link and the split mold sheet, and extends the service life.

[0028] FIGS. 15 to 17 show the movement process of the split mold, including the opening of the split mold sheet during the winding of the composite material and the contraction of the split mold sheet after cooling. The movement of the split mold sheet is not a single axial movement or a single radial movement, but a composite movement of these two split movements, which reflects the necessity of designing the cross-sectional angle of the right inclined surface of the split mold sheet and the metal annular rib with a trapezoidal cross-section on the right side.

[0029] As shown in FIG. 18, it is the control of the drive device motor. Turn on the circuit breaker QF switch, and the KT1 and KT2 time relays are respectively t 1Set the delay \(t_s\) of the KT time relay so that it is delayed. Press the SB2 start switch, the KM1 coil is powered, the KM1 main contact closes (left main circuit), KM1 is normally on and assists in closing the contact, forms a self-lock, and as the motor M1 starts, the KT and KT1 coils are powered. After \(t_s\), the KT time relay is delayed, the closed switch turns off, the KM2 coil is powered, the KM2 main contact closes, KM2 is normally on and assists in closing the contact, and the motor M2 starts. 1 After \(t\) seconds, the KT1 switch turns off, the KM1 coil is de-energized, the motor M1 stops, (t 1 +\(t\)) seconds later, the KT2 switch turns off, the KM2 coil is de-energized, and the motor M2 stops. The entire control process ends. SB2 is the emergency stop switch.

[0030] In this embodiment, a split mold structure is used to complete the processing of composite materials, and after the processing is completed, the mass and structure of the mold are reduced. Without affecting the strength and toughness of the composite material processing while ensuring the processing accuracy, the lightweight design of the entire finished product is completed, reducing production costs and energy consumption. The entire device can be removed by a coupling. During the heating process of the composite material, the stepping motor is removed, which can extend the life of the electronic device and ensure the safety of the processing process.

[0031] Embodiment 3 As shown in Figure 19, the processing method of the columnar pressure-resistant case made of composite material with an internal tension metal annular rib in this embodiment includes the following steps.

[0032] The first step: Assemble each component including an internal moving member, a mold (aluminum mold and split mold), a stepping motor, a metal support frame, and a metal annular rib. Ensure that the metal support frame accurately supports the metal annular rib and the aluminum mold, and fix the internal screw joining device. After setting the screws and their connecting parts to the initial values, connect to the stepping motor through a coupling, fix the stepping motor to the support frame, and debug its operation.

[0033] Step 2: After assembling the machine and electronic components, by controlling the stepping motor, the movement of the stepping motor shaft is transmitted to the link moving platform through a screw, thereby fully opening the split mold and facilitating the winding of the composite material.

[0034] Step 3: After ensuring that the split mold is fully open and the metal annular rib and the aluminum mold are fixed, wind the composite material, and ensure that the split mold is always fully open throughout the winding process.

[0035] Step 4: To avoid damage to the electronic device during heating and consider safety, after the winding of the composite material is completed, the coupling can be removed to separate the electronic device.

[0036] Step 5: Put all other structures except the electronic device into the heating chamber together, heat and form the composite material, heat it to the target temperature and keep it warm for a while, then take it out, air-cool it to room temperature, and then reinstall it and connect it to the stepping motor.

[0037] Step 6: Control the stepping motors on both sides, set the rotation speed of the stepping motor to n, after exciting the right stepping motor, the stepping motor starts to rotate, and after ts, start the left stepping motor, giving a time difference to the two sets of different mold sheets, and the shrinkage of the split mold can be realized.

[0038] According to formula (1), the load torque of the motor can be calculated. In the formula, μ is the friction coefficient, W is the weight (Kg) of the columnar pressure-resistant case made of composite material with an inner metal annular rib, P is the screw pitch (m), 1 / R is the reduction ratio, and η is the efficiency of the transmission coefficient. The distance that the screw moves the link horizontally can be calculated by formula (2), where L is the horizontal movement distance (m) of the link and K is the rotation speed of the screw.

[0039]

Number

[0040] N = n·t (3) Step 7: When the split mold shrinks to the set value, turn off the power of the stepping motor and remove the coupling to release the restriction of one of the support frames and axially remove the split mold and related structures from the other side.

[0041] Step 8: Separate the aluminum molds at both ends.

[0042] Step 9: Obtain a columnar pressure-resistant case made of a composite material with an internally lined metal annular rib.

[0043] Finally, the processing of the columnar pressure-resistant case made of a composite material with an internally lined metal annular rib is completed. Compared with the conventional composite material processing technology, the greatest feature of this processing method is the lightweight design of the structure. There is no need to separate from the intermediate metal annular rib mold. The split mold realizes the automation of opening and expansion / contraction, and the operation is more accurate. The finished product made of composite material processed by this device ensures the structural strength and toughness, reduces the weight of the finished product, makes the processing of the composite material more environmentally friendly and more economical.

Claims

1. A columnar pressure-resistant case made of a composite material having an internally-lined metal annular rib, comprising a columnar casing (5) made of a composite material, wherein a plurality of metal annular ribs (14) are installed on the inner wall of the columnar casing (5) made of a composite material, and the metal annular rib is in close contact with the columnar casing made of a composite material. A columnar pressure-resistant case made of a composite material having an internally-lined metal annular rib, characterized in that.

2. The columnar pressure-resistant case made of a composite material having an internally-lined metal annular rib according to claim 1, wherein two metal annular ribs are installed on the inner wall of the columnar casing made of a composite material.

3. Including a heating device, a bracket (1), a driving device, and a mold, the mold includes a split mold (6) and an aluminum film (4), the split mold is installed between two metal annular ribs (14), and aluminum films (4) are installed at the ends of the two metal annular ribs (14) away from the split mold (6). The split mold (6), the metal annular rib (14), and the aluminum film (4) are positioned by the bracket (1), and a columnar outer wall is formed on the outer wall surfaces of the split mold (6), the metal annular rib (14), and the aluminum film (4). The heating device is used to heat after installing a composite material layer on the columnar outer wall to form a columnar casing (5) made of a composite material. The split mold includes a plurality of alternately arranged first mold plates and second mold plates. The driving device drives the first mold plate (61) and the second mold plate (62) to contract, separate from the metal annular rib, and detach from the columnar casing made of a composite material. A processing device for a columnar pressure-resistant case made of a composite material having an internally-lined metal annular rib according to claim 2, characterized in that.

4. The driving device includes a first driving unit, a second driving unit, and a screw joint device (11). The first mold plate (61) and the second mold plate (62) are both hinged to the screw joint device (11) via a link. The first driving unit drives the first mold plate to contract, and the second driving unit drives the second mold plate to contract. The first driving unit and the second driving unit are activated with a time shift. A processing device according to claim 3, characterized in that.

5. The first driving unit includes a first driving motor (2), a first screw (9) and a first screw nut (13). The first driving motor is installed on a bracket (1). One end of the first screw (9) is fixedly connected to the first driving motor (2), and the other end of the first screw is fixedly connected to a screw joint device (10). The first screw nut is installed on the first screw and hinged to a link (7) connected to the first mold plate via a driving rod. The first driving motor rotates to rotate the first screw, and the first screw rotates to move the first screw nut, thereby moving the first mold plate closer to or farther from the first screw. The second driving unit includes a second driving motor (16), a second screw (17) and a second screw nut (18). The second driving motor is installed on the bracket. One end of the second screw is fixedly connected to the second driving motor, and the other end of the second screw is fixedly connected to the screw joint device (10). The second screw nut is installed on the second screw and hinged to a link connected to the second mold plate via a driving rod. The second driving motor rotates to rotate the second screw, and the second screw rotates to move the second screw nut, thereby moving the second mold plate closer to or farther from the second screw. The first screw and the second screw are located on the same straight line in the extending direction and rotate relatively independently. The processing device according to claim 4, characterized in that.

6. When the first mold plate and the second mold plate are simultaneously contracted or expanded, the moving directions of the first screw nut and the second screw nut are the same. The processing device according to claim 5, characterized in that.

7. Matched stepped locking ports are installed on the contact surface between the first mold plate (61) and the second mold plate (62). The stepped locking ports on both sides of the first mold plate are both located on the outside, and the stepped locking ports on both sides of the second mold plate are both located on the inside. The first driving unit is started earlier than the second driving unit, and the first driving unit and the second driving unit are stopped simultaneously. The processing device according to claim 6, characterized in that.

8. The first mold plate and the second mold plate move to the first end of the columnar casing made of composite material during contraction. The longitudinal section of the metal annular rib close to the first end of the columnar casing made of composite material is trapezoidal, and the outer trapezoidal bottom surface of the longitudinal section of the metal annular rib is longer than the inner trapezoidal bottom surface. The longitudinal sections of the first mold plate and the second mold plate are right trapezoids, and the hypotenuse of the right trapezoid matches the hypotenuse of the trapezoid of the longitudinal section of the metal annular rib. The processing device according to claim 6, characterized in that.

9. A processing method using the processing device according to any one of claims 3 to 8, comprising: (1) Assembling the processing device and installing the driving device, the mold and the metal annular rib on the bracket; (2) Driving the split mold so that the driving device expands, and forming a columnar outer wall on the outer wall surfaces of the split mold, the metal annular rib, and the aluminum film; (3) Winding a composite material around the columnar outer wall; (4) Heating and forming the composite material to form a columnar casing made of composite material; (5) Driving the split mold so that the driving device contracts, and realizing the separation of the split mold from the columnar casing made of composite material; (6) Releasing the restriction of the bracket, detaching the aluminum film from the columnar casing made of composite material, and obtaining a columnar pressure-resistant case made of composite material with an inner metal annular rib. A processing method using the processing device according to any one of claims 3 to 8, characterized in that.

10. In step (4), the composite material is heated and formed in a heating chamber. Before heating, the electronic device is removed, heated to the target temperature, kept warm for a while, then taken out of the heating chamber, air-cooled to room temperature, and then reinstalled and connected to the electronic device. The processing method according to claim 9, characterized in that.

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