Method and device for microwave curing of fiber-reinforced resin-based composite components

Abstract

The invention relates to a method and a device for curing a fiber-reinforced resin-based composite material component by utilizing microwaves. The microwaves which are generated by a microwave source with linearly-adjustable power are guided into a resonant cavity, and the microwaves penetrate through and heat the composite material, so that the composite material can be quickly cured and formed. By adopting the advanced octagonal microwave-mode resonant cavity, the uniformity of an electromagnetic field inside the device can be realized; the interference of the reflection wave on the microwave source can be reduced by adopting an automatic impedance matching system, so that the optimal transmission of the microwave power can be realized. A vacuum pipe connector and a temperature sensor are arranged on the inner side wall of the octagonal multi-mode resonant cavity, a glass worktable is arranged inside the resonant cavity, and the rotation of a ball screw is controlled through a stepper motor to control the back-forth movement of the worktable. A choking groove is adopted to prevent the leakage of the microwave. By adopting the method and the device, the problems of the traditional autoclave forming method that the time for manufacturing the fiber-reinforced composite material is long, the energy consumption is high and the heat is non-uniform can be solved, the curing time can be saved, and the quality and performance of the composite material component can be improved.

Description

technical field

[0001] The invention relates to a method for curing composite materials, in particular to a method and device for final curing of composite material components using microwaves, in particular to a method for microwave-cured fiber-reinforced resin-based composite material components. Background technique

[0002] As we all know, fiber-reinforced resin-based composite materials have the advantages of high specific strength and specific stiffness, light weight, heat resistance, corrosion resistance, fatigue resistance, and good shock absorption performance, and are widely used in aerospace, transportation, wind power, electronic power and other fields. Prepreg is a prepreg sheet product made by impregnating reinforcing fibers (carbon fiber, glass fiber, aramid fiber) in a matrix (epoxy resin, polyester resin, thermoplastic resin, etc.). intermediate material.

[0003] Due to the above-mentioned excellent properties of composite materials, different molding met...

Examples

Embodiment 1

[0033] like Figure 1-4 shown.

[0034] A method for microwave curing of fiber-reinforced resin-based composite components, which first pre-evacuates one or several layers of prepreg fiber layups used to manufacture composite components, and puts them into octagonal multi-mode Microwave heating is carried out in the resonant cavity. During the entire curing process, temperature sensors are used to monitor the temperature of multiple points on the surface of the component, and the microwave power is automatically controlled to make the heating temperature conform to the process curve. Real-time measurement and monitoring of temperature and vacuum of components during curing. After the composite material is solidified, the furnace door is opened, and the component is placed outside the device to cool down. The next batch of parts and components are then put into the device for solidification and molding according to the above method. like figure 1 , 2 shown.

[0035] Duri...

Embodiment 2

[0037] like Figure 1-3 shown.

[0038] A device for microwave-curing fiber-reinforced resin-based composite components, which includes: a carrier glass plate 1, a vacuum tube interface 2, a choke groove 3, a slit antenna 4, a furnace body 5, a temperature sensor joint 6, a temperature control panel 7, Operation panel 8, such as figure 1 , furnace door 9, ball screw 10, stepper motor 11, PLC12, cooling water inlet 13, cooling water outlet 18, microwave source 19, microwave transmission line 20, impedance matching device 21, rectangular waveguide device 22 and octagonal multi mode resonator 23, such as figure 2 , the octagonal multimode resonant cavity 23 is installed in the furnace body 5, the rear portion of the octagonal multimode resonant cavity 23 has a movement channel for the ball screw 10, the rest of the rear part is sealed, and the front furnace door 9. A common choke-sealed metal coil is used to ensure no electromagnetic leakage; the loading glass plate 1 is conn...

specific Embodiment

[0039] Taking carbon fiber as a reinforcing material and taking a thermosetting resin as a matrix, the specific embodiments of curing the components of the present invention are as follows:

[0040] Figure 4 It is the layering process of the composite material of the present invention on the mould. Brush a layer of release agent 102 evenly on the molding surface of the mold 101, brush the second time after 20 minutes, and brush the third time after another 30 minutes. After the mold release agent 102 is dried and solidified, take 20 layers of the prepreg 106 of the thermosetting resin-based carbon fiber reinforced composite material that has been cut, and lay them on the mold made of the composite material in the order of 0°, 45°, 90°, and 135°. 101, make the layer and layer, between the material surface and the mould, be close to each other.

[0041] After the layering is completed, a release cloth 103, a porous isolation film 105, an air felt 107, and a vacuum bag 104 are...

technical field

[0001] The invention relates to a method for curing composite materials, in particular to a method and device for final curing of composite material components using microwaves, in particular to a method for microwave-cured fiber-reinforced resin-based composite material components. Background technique

[0002] As we all know, fiber-reinforced resin-based composite materials have the advantages of high specific strength and specific stiffness, light weight, heat resistance, corrosion resistance, fatigue resistance, and good shock absorption performance, and are widely used in aerospace, transportation, wind power, electronic power and other fields. Prepreg is a prepreg sheet product made by impregnating reinforcing fibers (carbon fiber, glass fiber, aramid fiber) in a matrix (epoxy resin, polyester resin, thermoplastic resin, etc.). intermediate material.

[0003] Due to the above-mentioned excellent properties of composite materials, different molding met...

Examples

Embodiment 1

[0033] like Figure 1-4 shown.

[0034] A method for microwave curing of fiber-reinforced resin-based composite components, which first pre-evacuates one or several layers of prepreg fiber layups used to manufacture composite components, and puts them into octagonal multi-mode Microwave heating is carried out in the resonant cavity. During the entire curing process, temperature sensors are used to monitor the temperature of multiple points on the surface of the component, and the microwave power is automatically controlled to make the heating temperature conform to the process curve. Real-time measurement and monitoring of temperature and vacuum of components during curing. After the composite material is solidified, the furnace door is opened, and the component is placed outside the device to cool down. The next batch of parts and components are then put into the device for solidification and molding according to the above method. like figure 1 , 2 shown.

[0035] Duri...

Embodiment 2

[0037] like Figure 1-3 shown.

[0038] A device for microwave-curing fiber-reinforced resin-based composite components, which includes: a carrier glass plate 1, a vacuum tube interface 2, a choke groove 3, a slit antenna 4, a furnace body 5, a temperature sensor joint 6, a temperature control panel 7, Operation panel 8, such as figure 1 , furnace door 9, ball screw 10, stepper motor 11, PLC12, cooling water inlet 13, cooling water outlet 18, microwave source 19, microwave transmission line 20, impedance matching device 21, rectangular waveguide device 22 and octagonal multi mode resonator 23, such as figure 2 , the octagonal multimode resonant cavity 23 is installed in the furnace body 5, the rear portion of the octagonal multimode resonant cavity 23 has a movement channel for the ball screw 10, the rest of the rear part is sealed, and the front furnace door 9. A common choke-sealed metal coil is used to ensure no electromagnetic leakage; the loading glass plate 1 is conn...

specific Embodiment

[0039] Taking carbon fiber as a reinforcing material and taking a thermosetting resin as a matrix, the specific embodiments of curing the components of the present invention are as follows:

[0040] Figure 4 It is the layering process of the composite material of the present invention on the mould. Brush a layer of release agent 102 evenly on the molding surface of the mold 101, brush the second time after 20 minutes, and brush the third time after another 30 minutes. After the mold release agent 102 is dried and solidified, take 20 layers of the prepreg 106 of the thermosetting resin-based carbon fiber reinforced composite material that has been cut, and lay them on the mold made of the composite material in the order of 0°, 45°, 90°, and 135°. 101, make the layer and layer, between the material surface and the mould, be close to each other.

[0041] After the layering is completed, a release cloth 103, a porous isolation film 105, an air felt 107, and a vacuum bag 104 are...

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