阅读说明：本技术 曲面蜂窝芯一次灌封成型装置及工艺 (One-step filling and sealing forming device and process for curved-surface honeycomb core ) 是由 陈亮 黄杰 胡德艳 于 2020-04-27 设计创作，主要内容包括：本发明公开了曲面蜂窝芯一次灌封成型装置及工艺,包括主体、上盖板、电热毯、控制仪表箱,本发明不仅可以避免传统方法加热成型时应用温度过高,使材料变软,在加压下使其强迫变形,造成蜂窝芯材料性能级别降级,材料糊化,寿命缩短等缺陷；另外,除了电热毯加热的灌封强化区,其余蜂窝芯材料均暴露在室温环境下,这种工艺不对蜂窝芯造成物理化学损伤,完全保持了材料应有性能,其物理机械性能不发生改变；同时,本发明工艺还能减少蜂窝芯和灌封材料使用量,提高材料利用率,减轻复合材料部件整体重量,提高工装模具周转率和生产组织的灵活性,释放设备产能,人力资源,节省能源消耗,改善环境。(The invention discloses a curved surface honeycomb core one-step filling and sealing molding device and a process, which comprises a main body, an upper cover plate, an electric blanket and a control instrument box, and can avoid the defects of honeycomb core material performance level degradation, material gelatinization, service life shortening and the like caused by overhigh application temperature, softening of the material and forced deformation of the material under pressurization in the traditional method during heating and molding; in addition, except for a filling and sealing strengthening area heated by the electric blanket, the other honeycomb core materials are exposed in a room temperature environment, the process does not cause physical and chemical damage to the honeycomb core, the due performance of the materials is completely maintained, and the physical and mechanical properties of the materials are not changed; meanwhile, the process can also reduce the usage amount of the honeycomb core and the encapsulating material, improve the material utilization rate, reduce the overall weight of the composite material part, improve the turnover rate of the tooling die and the flexibility of production organization, release the capacity of equipment and human resources, save the energy consumption and improve the environment.)

1. The curved honeycomb core one-step filling and sealing forming device is characterized by comprising a main body, an upper cover plate, an electric blanket and a control instrument box, wherein the upper surface of the main body and the lower surface of the upper cover plate are curved surfaces, one end of the upper cover plate is hinged to one end of the main body, the other end of the upper cover plate is provided with a lead screw pressing assembly connected with the upper surface of the main body, so that a honeycomb core to be filled and sealed can be pressed between the upper cover plate and the upper surface of the main body, the upper surface of the main body is provided with a plurality of filling and sealing strengthening areas which are sunken downwards, a strengthening area cover plate is arranged in the filling and sealing strengthening areas, the upper surface of the strengthening area cover plate is a curved surface corresponding to the radian of the upper surface of the main body, an electric blanket placing cavity is arranged between the lower part of the strengthening area and the, and a filling and sealing die and a pressure equalizing block are arranged in the hollow part of the C-shaped molded surface pressure block.

2. The one-step pouring, sealing and forming device for the curved honeycomb core according to claim 1, wherein the main body comprises a main body upper surface and a main body side plate downwardly disposed around the main body upper surface, and a plurality of cavity support plates connected to the main body side plate are further disposed at a lower portion of the main body upper surface.

3. The one-step pouring, sealing and forming device for the curved honeycomb core according to claim 1, wherein a plurality of positioning blocks for determining the placement position of the honeycomb core are arranged at two ends of the upper surface of the main body, a baffle plate for limiting the tilting of the main positioning edge of the honeycomb core is arranged at the upper part of the positioning block at one end of the upper surface of the main body close to the hinge joint with the upper cover plate, and the baffle plate is fixed on the upper surface of the positioning block through screws.

4. The one-step pouring, sealing and forming device for the curved honeycomb core according to claim 1, wherein the reinforced area cover plate is fixedly connected with the main body at four corners through screws.

5. The one-step filling and sealing molding device for the curved-surface honeycomb core according to claim 1, wherein the lead screw compression assembly comprises a lead screw rod, the top end of the lead screw rod penetrates out of the upper cover plate through a bearing and is connected with a handle, a locking hole corresponding to the bottom end of the lead screw rod is formed in the main body, and an internal thread matched with the lead screw rod is arranged in the locking hole.

6. The one-step filling and sealing molding device for the curved honeycomb core according to claim 1, wherein the control instrument box comprises a programmable temperature controller and a thyristor switch power supply, the electric blanket is provided with a plurality of thermocouples connected with the programmable temperature controller, and the programmable temperature controller is connected with an external power supply through the thyristor switch power supply and supplies power to the electric blanket.

7. The one-step embedment molding device of the curved-surface honeycomb core according to claim 1, wherein the bottom surfaces of the C-shaped profile pressing block, the embedment mold and the pressure equalizing block are all curved surfaces corresponding to the radian of the upper surface of the main body.

8. The one-step pouring and sealing molding device for the curved honeycomb core according to claim 1, wherein the molding method comprises the following steps:

(1) opening the upper cover plate, placing the curved honeycomb core to be encapsulated on the upper panel of the main body, and enabling the curved honeycomb core to correspond to the guide block in position;

(2) covering the upper cover plate, pressing the curved honeycomb core to be encapsulated between the upper cover plate and the main body through the lead screw pressing assembly, and completely attaching the C-shaped profile pressing block to the upper surface of the honeycomb core to determine a local encapsulation position;

(3) filling the material in the encapsulation mold into the honeycomb core grids of the encapsulation strengthening area through the encapsulation mold;

(4) and the programmable temperature controller is used for controlling the heating of the electric blanket, removing the encapsulating mould and placing the upper pressure equalizing block, and realizing the solidification of the encapsulating material of the local honeycomb core.

Technical Field

The invention relates to the technical field of honeycomb core forming, in particular to a curved-surface honeycomb core one-step filling and sealing forming device and process.

Background

The honeycomb core is used as the interlayer of the composite material sandwich structure, so that compared with a metal structure, the composite material sandwich structure has the advantages of greatly reduced weight and high specific rigidity, and is widely applied to structures in the aerospace field, particularly secondary stressed structural members with higher bending rigidity requirements. However, due to the unique structural characteristics of the honeycomb, the honeycomb is less capable of bearing concentrated loads, and thus local potting reinforcement is required where attachment inserts are locally required to be installed.

The prior art methods have been carried out in multiple steps for decades. The raw material plane honeycomb core is roughly cut with a large amount of allowance, wrapped by a heat-resistant Kevlar aramid fiber material, placed on a forming die, pressed and fixed by a weight such as a pressing plate, a sand bag and the like, and then sent into a hot oven to be heated and kept for a certain time for shaping. The honeycomb core material is transferred to a filling and sealing mould, the position of the honeycomb core material is marked by using a line-drawing template, and then local filling and sealing operation is carried out after the upper surface and the lower surface of the periphery of the position, which needs filling and sealing, of the honeycomb core are pasted with paper for protection. After the potting material is cured, the upper and lower surfaces of the reinforced area are manually polished to form the required curved surface profile. The traditional process method has the defects of multiple steps, long overall process time, multiple manual operations and the like, and has the biggest quality problems that the honeycomb core material is subjected to high temperature and forced deformation in the forming process, core grids are damaged, the bonding strength among the core grids is reduced, resin soaked in the honeycomb core is pasted and becomes brittle, the overall performance is degraded, and the service life is shortened. In addition, the blank honeycomb core after being heated and shaped in the hot oven by using the forming die is not completely restricted by materials, so that the molded surface is not rebounded or deformed any more, and the forming effect is not ideal. In consideration of possible position deviation needing to be strengthened, more allowance is left for blanks in the process, and the size deviation is intentionally increased in local position filling and sealing operation, so that waste of raw material honeycomb cores and filling and sealing materials is caused. The upper surface and the lower surface of the honeycomb core reinforced by local encapsulation need to be polished manually, gaps exist when the honeycomb core and a follow-up curved surface interlayer part are attached to the surface of a laying tool, and the honeycomb core is not firmly bonded with a surface skin or has the quality hidden troubles of excessive deviation of the reinforced position of the honeycomb core and the required position center and the like. Therefore, a process for one-time potting reinforcement and molding of the curved honeycomb core needs to be researched.

Disclosure of Invention

In order to solve the technical problems, the technical scheme provided by the invention is as follows: the curved surface honeycomb core one-step encapsulation forming device comprises a main body, an upper cover plate, an electric blanket and a control instrument box, wherein the upper surface of the main body and the lower surface of the upper cover plate are curved surfaces, one end of the upper cover plate is hinged to one end of the main body, the other end of the upper cover plate is provided with a lead screw compression assembly connected with the upper surface of the main body, so that a honeycomb core to be encapsulated can be compressed between the upper cover plate and the upper surface of the main body, the upper surface of the main body is provided with a plurality of encapsulation strengthening areas which are sunken downwards, a strengthening area cover plate is placed in the encapsulation strengthening areas, the upper surface of the strengthening area cover plate is a curved surface corresponding to the radian of the upper surface of the main body, an electric blanket placing cavity is arranged between the lower part of the strengthening area and the inner bottom surface of the encapsulation strengthening areas, the electric blanket is arranged in the, And (6) uniformly pressing the blocks.

As an improvement, the main body comprises a main body upper surface and main body side plates arranged downwards on the periphery of the main body upper surface, and a plurality of cavity supporting plates connected with the main body side plates are further arranged on the lower portion of the main body upper surface.

As an improvement, main part upper surface both ends are equipped with the locating piece that the several is used for deciding honeycomb core and places the position, and its upper portion of locating piece that is located main part upper surface and is close to the one end with the articulated department of upper cover plate is equipped with the baffle of restriction honeycomb core owner location limit perk, the baffle passes through the screw fixation in locating piece upper surface.

As an improvement, the four corners of the reinforced area cover plate are fixedly connected with the main body through screws.

As an improvement, the lead screw compressing assembly comprises a lead screw lever, the top end of the lead screw lever penetrates out of the upper cover plate through a bearing and is connected with a handle, a locking hole corresponding to the bottom end of the lead screw is formed in the main body, and an internal thread matched with the lead screw lever is arranged in the locking hole.

As an improvement, the control instrument box comprises a programmable temperature controller and a silicon controlled switch power supply, wherein a plurality of thermocouples connected with the programmable temperature controller are arranged on the electric blanket, and the programmable temperature controller is connected with an external power supply through the silicon controlled switch power supply and provides power for the electric blanket.

As an improvement, the bottom surfaces of the C-shaped molded surface pressing block, the filling and sealing die and the pressure equalizing block are all curved surfaces corresponding to the radian of the upper surface of the main body.

As an improvement, the forming method comprises the following steps:

(1) opening the upper cover plate, placing the curved honeycomb core to be encapsulated on the upper panel of the main body, and enabling the curved honeycomb core to correspond to the guide block in position;

(2) covering the upper cover plate, pressing the curved honeycomb core to be encapsulated between the upper cover plate and the main body through the lead screw pressing assembly, and completely attaching the C-shaped profile pressing block to the upper surface of the honeycomb core to determine a local encapsulation position;

(3) filling the material in the encapsulation mold into the honeycomb core grids of the encapsulation strengthening area through the encapsulation mold;

(4) and the programmable temperature controller is used for controlling the heating of the electric blanket, removing the encapsulating mould and placing the upper pressure equalizing block, and realizing the solidification of the encapsulating material of the local honeycomb core.

After adopting the structure, the invention has the following advantages: the method is different from the traditional multi-step process of firstly heating and forming and then locally filling and forming, the filling and forming process of the curved honeycomb core is carried out at room temperature and is completed at one time, so that the defects that the performance level of the honeycomb core material is degraded, the material is gelatinized, the service life is shortened and the like due to the fact that the material is softened and is forced to deform under pressurization in the traditional method when the application temperature is overhigh in the heating and forming process can be avoided; the process method disclosed by the invention realizes permanent restraint on the honeycomb core and the encapsulating material along with the curing of the encapsulating material under the room temperature condition, forms a required curved surface profile, and ensures that the reinforcing area and the curved surface profile of the honeycomb core are not changed after being separated from a die; in addition, except for a filling and sealing strengthening area heated by the electric blanket, the other honeycomb core materials are exposed in a room temperature environment, the process does not cause physical and chemical damage to the honeycomb core, the due performance of the materials is completely maintained, and the physical and mechanical properties of the materials are not changed; meanwhile, the process can also reduce the usage amount of the honeycomb core and the encapsulating material, improve the material utilization rate, reduce the overall weight of the composite material part, improve the turnover rate of the tooling die and the flexibility of production organization, release the capacity of equipment and human resources, save the energy consumption and improve the environment.

Drawings

Fig. 1 is a schematic structural view of a curved honeycomb core one-step potting molding device of the invention.

Fig. 2 is a schematic diagram of a split structure of the curved honeycomb core one-step potting molding device of the invention.

Fig. 3 is a schematic structural diagram of a main body in the one-step potting molding device for the curved honeycomb core of the invention.

Fig. 4 is a schematic structural diagram of the bottom of the main body in the one-step pouring and forming device for the curved honeycomb core.

Fig. 5 is a schematic structural diagram of a positioning block in the one-step potting molding device for the curved honeycomb core of the present invention.

Fig. 6 is a schematic structural view of an electric blanket placing cavity in the curved-surface honeycomb core one-step filling and sealing molding device.

Fig. 7 is a schematic connection diagram of a control instrument box in the one-step filling and sealing molding device for the curved honeycomb core.

Fig. 8 is a schematic structural view of a potting mold in the curved honeycomb core one-step potting molding device of the present invention.

Fig. 9 is a schematic view of the use of the potting mold in the curved honeycomb core one-step potting molding device of the present invention.

As shown in the figure: 1. the main part, 1.1, the main part upper surface, 1.2, the main part curb plate, 1.3, the cavity backup pad, 2, the upper cover plate, 3, the electric blanket, 4, the lead screw compresses tightly the subassembly, 4.1, the silk pole, 4.2, the handle, 5, wait to encapsulate honeycomb core, 6, the encapsulation reinforced area, 7, reinforced area apron, 8, the electric blanket is placed the chamber, 9, C type profile briquetting, 10, the encapsulation mould, 10.1, the encapsulation mould main part, 10.2, the depression bar guide lock, 10.3, the depression bar briquetting, 10.4, the connecting rod, 10.5, the depression bar handle, 10.6, the encapsulation material chamber, 10.7, the direction passageway, 11, the equalizer block, 12, the locating piece, 13, the baffle, 14, portable isolation material.

Detailed Description

With reference to the attached drawings, the curved honeycomb core one-step encapsulation molding device comprises a main body 1, an upper cover plate 2, an electric blanket 3 and a control instrument box, wherein the upper surface 1.1 of the main body and the lower surface of the upper cover plate 2 are curved surfaces, one end of the upper cover plate 2 is hinged to one end of the main body 1, the other end of the upper cover plate is provided with a lead screw compression assembly 4 connected with the upper surface 1.1 of the main body, so that a honeycomb core 5 to be encapsulated can be compressed between the upper cover plate 2 and the upper surface of the main body 1, the upper surface 1.1 of the main body is provided with a plurality of encapsulation strengthening areas 6 sunken downwards, a strengthening area cover plate 7 is arranged in the encapsulation strengthening areas 6, the upper surface of the strengthening area cover plate 7 is a curved surface corresponding to the radian of the upper surface 1.1 of the main body, an electric blanket placing cavity 8 is arranged between the lower part of the upper surface of the encapsulation strengthening areas 6, the electric blanket 3 is arranged, and a potting mold 10 and a pressure equalizing block 11 are arranged in the hollow part of the C-shaped molded surface pressing block 9.

As a preferred embodiment of this embodiment, the main body 1 includes a main body upper surface 1.1, a main body side plate 1.2 downwardly disposed around the main body upper surface 1.1, and a plurality of cavity supporting plates 1.3 connected to the main body side plate 1.2 are further disposed at a lower portion of the main body upper surface 1.1.

As a preferred embodiment of this embodiment, it is characterized in that a plurality of positioning blocks 12 for determining the placement position of the honeycomb core are disposed at two ends of the upper surface of the main body 1, a baffle 13 for limiting the tilting of the main positioning edge of the honeycomb core is disposed at the upper portion of the positioning block 12 located at one end of the upper surface 1.1 of the main body close to the hinge joint with the upper cover plate 2, and the baffle 13 is fixed on the upper surface of the positioning block 12 by screws.

As a preferred embodiment of the present embodiment, the reinforced cover 7 is fixedly connected to the main body 1 at four corners by screws.

As a preferred embodiment of this embodiment, the lead screw pressing assembly 4 includes a screw lever 4.1, the top end of the screw lever 4.1 penetrates through the upper cover plate 2 through a bearing and is connected to a handle 4.2, the main body 1 is provided with a locking hole corresponding to the bottom end of the screw lever 4.1, and the locking hole is provided with an internal thread matched with the screw lever 4.1.

As a preferred embodiment of this embodiment, the control instrument box includes a programmable temperature controller and a thyristor switch power supply, a plurality of thermocouples connected to the programmable temperature controller are provided on the electric blanket 3, and the programmable temperature controller is connected to an external power supply through the thyristor switch power supply and supplies power to the electric blanket 3.

The programmable temperature controller and the silicon controlled switch power supply are all the existing devices; the programmable temperature controller determines the on-off of the silicon controlled switch power supply according to the logic programmed in advance through the temperature data feedback of the electric blanket transmitted by the thermocouple, and controls the parameters of the electric blanket such as heating, temperature rising and reducing rate, heat preservation time and the like; one end of the silicon controlled switch power supply is connected with external power supply, the other end of the silicon controlled switch power supply provides power for the electric blanket through a control box socket, and the silicon controlled switch power supply receives signals of the programmable temperature controller to execute on-off instructions and control the electric blanket to heat; the heating loop is arranged in the electric blanket, and a power plug outside the electric blanket is directly connected to a power socket of the control box.

In the preferred embodiment of this embodiment, the bottom surfaces of the C-shaped press block 9, the potting mold 10 and the pressure equalizing block 11 are all curved surfaces corresponding to the radian of the upper surface of the main body 1.

As a preferred embodiment of this embodiment, the potting process comprises the following steps:

(1) opening the upper cover plate 2, placing the curved honeycomb core 5 to be encapsulated on the upper panel of the main body 1, and enabling the curved honeycomb core to correspond to the guide block 12 in position;

(2) covering an upper cover plate 2, pressing a curved honeycomb core 5 to be encapsulated between the upper cover plate 2 and a main body 1 through a lead screw pressing assembly 4, and completely attaching a C-shaped profile pressing block 9 to the upper surface of the honeycomb core 5 to determine a local encapsulation position;

(3) filling the material in the encapsulation mold 10 into the honeycomb core lattice in the encapsulation strengthening area through the encapsulation mold 10;

(4) and the programmable temperature controller is used for controlling the heating of the electric blanket 3, the filling and sealing mould 10 is removed, and the pressure equalizing block 11 is placed on the filling and sealing mould, so that the solidification of the local honeycomb core filling and sealing material is realized.

In addition, the potting mold 10 in the present application may use the following structure: the device comprises a main body 10.1 of an encapsulation mold, a pressure rod guide lock 10.2, a pressure rod pressing block 10.3, a connecting rod 10.4 and a pressure rod handle 10.5, wherein an encapsulation material cavity 10.6 corresponding to the shape of the pressure rod pressing block 10.3 penetrates through the main body 10.1 of the encapsulation mold, the pressure rod guide lock 10.2 is sleeved on the upper portion of the main body 10.1 of the encapsulation mold, a guide channel 10.7 which is communicated with the encapsulation material cavity 10.6 and corresponds to the shape of the pressure rod pressing block 10.3 is arranged at the top of the pressure rod guide lock 10.2, the connecting rod 10.4 is connected between the top of the pressure rod pressing block 10.3 and the pressure rod handle 10.5, the bottom surface of the main body of the encapsulation mold 10.1 is arranged corresponding to a honeycomb core 5 to be encapsulated, and a movable isolating material 14 is further arranged between the bottom of the.

Therefore, step (3) in the encapsulation process of the present application may specifically include the following steps:

s1, placing a movable isolation material 14 on the surface of the honeycomb core at the encapsulation position;

s2, placing the encapsulation mold main body 10.1 on the surface of the movable isolation material 14;

s3, filling the potting mold main body 10.1 with the potting material, and scraping the upper surface of the potting material and the upper edge of the potting mold main body 10.1;

s4, sleeving the pressure bar guide lock 10.2 on the upper part of the encapsulation mold main body 10.1;

s5, pressing the pressure lever handle 10.5 to move the pressure lever pressing block 10.3 downwards along the guide channel 10.7 of the pressure lever guide lock 10.2 until the bottom surface of the pressure lever pressing block 10.3 is completely contacted with the surface of the potting material, so as to ensure that no air remains;

s6, extracting the isolation material 14 from the bottom of the encapsulation mold main body 10.1;

s7, pressing a pressure lever handle 10.5 and a lower connecting rod 10.4, and filling potting materials into the honeycomb core grids;

s8, removing all the molds, and confirming that the surfaces of the honeycomb core encapsulation positions are flat;

s9, placing an isolation material on the surface of the encapsulating material;

s10, placing the pressure equalizing block 11 on the surface of the isolation material, wherein the lower surface of the pressure equalizing block is consistent with the surface curve of the honeycomb core.

S11, placing a sand bag with standard weight on the pressure equalizing block 11 to ensure the stability of the pressure equalizing block.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.