Ridge line position deformation compensation method for ridge characteristic composite thin-wall part

Abstract

The invention discloses a compensation method for deformation of a resin-based composite thin-wall part with ridge characteristics at a ridge line position, and aims to solve the problem of springbackdeformation generated after a thin-wall part is formed, provide the deformation compensation method for the part ridge line deformation area according to the characteristic that a ridge part deformsat a ridge line position and deforms at a curved surface. The theoretical number model surface and the deformed number model surface under different reference points are compared to obtain the deformation amount; an analogy lever model is used; the fitting relationship between the deformed digital model surface and the theoretical digital model surface is analogous to a lever; determining a similar fulcrum area as a key correction area; by compensating the deformation of the ridge line position, the purposes of controlling the deformation amount of the part to meet the production requirement and reducing the influence on the geometrical shape of the ridge line position of the part as much as possible are achieved, the repeated compensation frequency in the compensation process can be reduced as much as possible, and a final iteration result closer to an ideal result is obtained by using less iteration frequency.

Description

technical field [0001] The invention relates to the technical field of component deformation compensation, in particular to a method for compensating for the position deformation of a ridge line for a composite material thin-walled part with ridge characteristics. Background technique [0002] Due to their excellent performance, composite parts have a wide range of applications in the fields of aviation, shipbuilding and automobile manufacturing. In the molding process of composite thin-walled parts, due to factors such as thermal expansion and cold contraction, the difference in thermal expansion coefficient between the material and the mold, and the chemical shrinkage effect of the material, the actual shape of the formed component will be different from the theoretical shape. As a result, during the production assembly process, the parts cannot be assembled according to the design requirements. In order to reduce the deformation after curing, there are two basic ideas: t...

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Problems solved by technology

The literature "Prediction and Compensation of Deformation of Solidification Molding of Composite Components (Chen Xiaojing. Deformation Prediction and Compensation of Solidification Molding of Composite Components [D]. Nanjing University of Aeronautics and Astronautics, 2011)" takes a thin-walled component as an example to compensate for deformation , for each position of the curved surface, the compensation method used is the same. If it is applied to the actual part production process, it will take a lot of time to obtain a profile that meets the production requirements, and it is even difficult to obtain a profile that meets the requirements.

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