Flexible roll-bending forming device and method for fiber-metal super hybrid composite laminate

Abstract

The invention discloses a flexible roll-bending forming device and method for a fiber-metal super hybrid composite laminate. The flexible roll-bending forming device comprises an upper rigid roll (1) and a lower flexible medium roll (2), wherein the lower flexible medium roll (2) is made of flexible materials, and the upper rigid roll (1) is made of rigid materials; the upper rigid roll (1) can rotate actively and can move up and down actively; a board (3) is fed into a gap between the upper rigid roll (1) and the lower flexible medium roll (2), the upper rigid roll (1) presses the lower flexible medium roll (2) to drive the lower flexible medium roll (2) to passively rotate, and the board (3) is roll-bended between the upper rigid roll (1) and the lower flexible medium roll (2) to obtain a shaped bent part. The device and the method, disclosed by the invention, have the advantages of strong implementability, high forming precision, high forming quality, small rebound phenomenon and uniform residual stress distribution, and therefore the device and the method have important engineering application value.

Description

technical field [0001] The invention belongs to the technical field of forming advanced composite materials, and in particular relates to a flexible rolling forming method of a fiber-metal super-hybrid composite laminate. Background technique [0002] Compared with traditional single metal materials, composite materials have the advantages of high specific modulus, high specific strength, excellent heat resistance and fatigue resistance, and outstanding designability, but they also have poor impact damage resistance and ductility. disadvantages such as poor performance and high cost. Considering the respective advantages of these two materials, a new type of fiber-metal hyperhybrid composite is gaining widespread attention in the industry. The fiber-metal hyperhybrid composite laminate is a kind of interlayer hybrid fiber prepared by the vacuum hot pressing curing process after alternate lamination of metal sheets (usually aluminum alloy or titanium alloy, etc.) and fiber-r...

AI Technical Summary

Problems solved by technology

However, self-forming can only produce single-curvature components with small curvatures, and cannot form more complex double-curvature or multi-curvature components; at the same time, this process needs to be formed while the material is solidified in an autoclave, and its forming flexibility Small, high mold cost

Not only that, the springback problem of the self-forming process is significant, and repeated empirical repairs are required, which increases the cost of mold manufacturing

[0005] In addition to the self-forming technology, many studies have also focused on the subsequent forming method of the fiber-metal hyperhybrid composite material after the autoclave preparation; however, due to the small failure strain of the fiber, the forming limit of the material is much smaller than that of the corresponding metal material. And it is easy to produce interlayer damage, and it is difficult to form

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