Composite material cap-type stringer forming device

Abstract

The invention relates to the technical field of hot die pressing forming, in particular to a composite material cap-type stringer forming device. The composite material cap-type stringer forming device comprises a lower die and an upper die, wherein the upper die comprises a cap top upper die and a side upper die, and the side upper die is connected with the cap top upper die through a second linear driving part; a limiting equal-height column is fixed on the lower surface of the side upper die; a guide hole corresponding to the limiting equal-height column is formed in the lower die; a sliding cavity communicates with the lower portion of the guide hole; a heightening plate is arranged in the sliding cavity; the heightening plate is connected with a transverse driving piece fixed on a lower base frame; and the transverse driving piece drives the heightening plate to move in the sliding cavity. According to the composite material cap-type stringer forming device, the limiting equal-height column and the heightening plate are arranged on the side upper die, so that the distance between the upper die and the lower die when the upper die is pressed down is changed, prepregs on two sides of a cap top are uniformly and smoothly shrunk towards the middle under the action of friction force between the upper die and the lower die when the cap top is pressed down, and the consistency and stability of product molding are improved.

Description

technical field [0001] The invention relates to the technical field of thermal molding and compression molding, in particular to a composite material hat-shaped stringer forming device. Background technique [0002] Hat stringers are used on commercial and military aircraft to secure metal fuselage components and metal wing skins. Advanced resin-based composite materials have the characteristics of light weight, high strength, high modulus, fatigue resistance, corrosion resistance, designability, and good manufacturability. They are ideal aeronautical structural materials. At present, composite materials have become the main body of the new generation of aircraft airframes. Structural materials. For the processing of hat-shaped stringers, hot molding preforming technology is often used. Hot molding preforming is a method in which a certain amount of prepreg is added to the metal mold, and it is heated and pressurized to cure and shape. [0003] In the prior art, during the...

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Problems solved by technology

[0004] However, when the upper mold is pressed down until the distance between the upper and lower molds is close to the thickness of the prepreg, it is difficult for the prepreg to slide between the upper and lower molds. The pressure on the prepreg is also increasing, which will cause the two sides of the prepreg to be fixed and the middle product of the prepreg to be deformed when the pressure is pressed down. Thin, and the prepreg often leaves more margin in the width direction, resulting in waste of material

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