An integral forming method of special-shaped flanging closed load-bearing frame
A technology of integral molding and load-bearing frame, which is applied in the field of thermal structural carbon/carbon composite material manufacturing, can solve the problems of discontinuous fibers at the assembly surface, reduce load-bearing efficiency, and increase costs, so as to solve deformation or even cracking and improve load-bearing capacity , The effect of shortening the manufacturing cycle
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Embodiment 1
[0053] to process figure 2 The load-bearing frame structure shown as an example:
[0054] 1) Use domestic T300-3K PAN-based carbon fiber to weave into twill carbon cloth, take the warp yarn direction as 0°, rotate counterclockwise to form +45°, 90° and -45° respectively, and then unfold according to the load-bearing frame surface The maximum envelope size is cut into carbon cloth pieces for later use;
[0055] 2) Make a mold according to the three-dimensional mathematical model of the load-bearing frame, lay the carbon cloth blocks in step 1) on the mold in the order of 0 / +45 / 90 / -45, and select the reference plane for laying as shown in the attached drawing The curved surface flanging A in the middle, and then press and sew the carbon cloth after laying, the stitching distance is 5mm×5mm, and obtain the intermediate fabric product;
[0056] 3) Flanging the fabric intermediate product in step 2), flanging from the curved surface part A to the flat part B, cutting the excess ...
Embodiment 2
[0068] to process figure 2 The bearing structure shown is an example:
[0069] 1) Use domestic T300-1K PAN-based carbon fiber to weave into twill carbon cloth, take the warp yarn direction as 0°, rotate counterclockwise to form +45°, 90° and -45° respectively, and then expand according to the load-bearing frame surface The maximum envelope size is cut into carbon cloth pieces for later use;
[0070] 2) Make a mold according to the three-dimensional mathematical model of the load-bearing frame, lay the carbon cloth blocks in step 1) on the fixture according to the laying sequence of 0 / / 90 / -45 / 0 / -45 / 90 / 0, lay Select the flat part B in the attached drawing as the reference plane for laying, and then press and sew the laid carbon cloth with a stitching distance of 8mm×8mm to obtain a fabric intermediate product;
[0071] 3) Flanging the fabric intermediate product in step 2), flanging from the plane part B to the curved surface part A, leaving a gap after cutting the carbon clo...
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