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A fiber-reinforced and composite material technology, which is applied in the field of composite material molding design, can solve the problems such as the unprepared pleated sandwich circular frustum shell process, and achieve the effects of saving preparation time and cost, reducing production cost, and reducing cutting
Active Publication Date: 2021-11-16
HARBIN INST OF TECH
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Problems solved by technology
[0003] In order to solve the problem that there is no process for preparing the pleated sandwich circular frustum shell at present, the present invention further provides a hot press forming method for the fiber reinforced composite material pleated sandwich circular frustum shell
Method used
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specific Embodiment approach 1
[0083] Specific implementation mode one: combine Figure 1 to Figure 25 Describe this embodiment, the hot press molding method of the fiber-reinforced composite material corrugated sandwich circular frustum shell of this embodiment,
[0084] Described method is realized through the following steps:
[0085] 1. Preparation of fiber-reinforced composite pleated core:
[0086] Step a, cleaning the core mold:
[0087] Clean the core mold with detergent and place it in a ventilated place to dry;
[0088] Step b, apply the release agent:
[0089] Spread the release agent evenly on the surface of the core mold, and then place it in a ventilated place until the core mold is completely dry;
[0090] Step c, assemble the core mold:
[0091] Assemble the first male mold 1-1 and the second male mold 1-2 in the core mold into a complete cone-shaped male mold main body, and then connect the inner support 1-6 of the first core mold to the first male mold through the connecting element. ...
specific Embodiment approach 2
[0128] Specific implementation mode two: combination figure 1 To illustrate this embodiment, the pressure applied to the female mold 1-3 in step e of this embodiment is 0.75Mpa. Other compositions and connections are the same as in the first embodiment.
specific Embodiment approach 3
[0129] Specific implementation mode three: combination figure 1 To describe this embodiment, the curing temperature in step f of this embodiment is 150° C., and the curing time is 2 hours. Other compositions and connections are the same as those in Embodiment 1 or Embodiment 2.
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Abstract
The invention relates to a thermocompression molding method for a folded sandwich circular frustum shell of fiber reinforced composite material, which relates to the field of composite material molding design. The invention solves the problem that there is no process for preparing the pleated sandwich circular frustum shell at present. The preparation method of the present invention comprises the following steps: 1. Preparation of the pleat core: cleaning and assembling the core mold; applying a release agent; cutting, laying, folding, and curing of the prepreg; stripping the pleat core; 2. Preparation of the inner panel: cleaning the panel mold; applying a release agent; assembling the main body of the inner panel mold; cutting, laying, laying, and curing of the prepreg; demoulding of the inner panel; 3. Preparation of the outer panel: fiber reinforced composite material The preparation of the outer panel is basically the same as step 2; 4. Assembly, bonding and secondary curing of the pleated core and the inner and outer panels: pasting of the adhesive film; gluing of the pleated core and the inner and outer panels; curing of the pleated sandwich circular frustum shell; panel mold disassembly. The invention is used for preparing fiber-reinforced composite folded sandwich circular frustum shells.
Description
technical field [0001] The invention relates to the field of composite material molding design, in particular to a hot-press molding method for fiber-reinforced composite material folded sandwich circular frustum shells. Background technique [0002] When the sandwich structure is applied to aerospace structures such as various aircraft and heavy-duty rocket bearing tubes, fairings, engine casings, and interstage sections, it needs to be prepared into a curved surface structure. In addition, because the diameters of some cylindrical shell structures are usually very different, some connecting devices need to be designed, and a typical matching structure is the frustum shell structure. At present, the frustum-shaped structure used in spacecraft is usually manufactured in the form of a metal frustum shell structure and stringer reinforcement, which inevitably produces the following disadvantages: (1) The forming process of a reinforced cylindrical shell with composite material...
Claims
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Application Information
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