Optimum design method of replacing steel with plastic for auto parts based on CAE simulation technology

Abstract

The invention discloses an automobile part steel-to-plastic optimal design method based on the CAE simulation technology. The method includes the steps: 1, analyzing stress conditions, fitting requirements and appearance features of automobile metal parts; 2, primarily designing the shape and wall thickness of automobile injection moulded plastic parts and the layout and shape of reinforcing bars; 3, subjecting the primarily designed injection moulded plastic parts to simulation analysis by CAE analysis; 4, performing CAE analysis to obtain simulation results such as modality, rigidity and strength of injection moulded plastic parts, and providing a modified structure optimal scheme; 5, establishing a corresponding database. The traditional experience-based judgment and theoretical strength check calculation methods are replaced by the CAE structure analysis, check analysis is more efficient and accurate, the basis for the steel-to-plastic optimal design of automobile parts is provided, weight is significantly reduced, material cost is greatly reduced, development cycle of products is shortened, and market competitiveness is improved.

Description

technical field [0001] The invention relates to an optimal design method of mechanical products, in particular to an optimal design method of replacing steel with plastic for auto parts, and belongs to the technical field of mechanical engineering. Background technique [0002] At present, auto parts are generally made of metal stampings or castings. The products are heavy and costly. In order to meet the requirements of product strength and Lightweight products are carried out through the idea of ​​further verification through tests. This method has low work efficiency, long product development cycle, high cost, and has high requirements for the operation of test personnel; in addition, topology optimization, size optimization, and shape optimization can also be used. Lightweight design of stamping parts or castings with other technologies, under the premise of ensuring the product strength and rigidity requirements, by simplifying the product structure shape and size, chan...

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Problems solved by technology

[0002] At present, auto parts are generally made of metal stampings or castings. The products are heavy and costly. In order to meet the requirements of product strength and Lightweight products are carried out through the idea of ​​further verification through tests. This method has low work efficiency, long product development cycle, high cost, and has high requirements for the operation of test personnel; in addition, topology optimization, size optimization, and shape optimization can also be used. Lightweight design of stamping parts or castings with other technologies, under the premise of ensuring the product strength and rigidity requirements, by simplifying the product structure shape and size, changing the product reinforcement rib layout, etc. Brings a difficult problem, the lightweight effect is not obvious

[0003] With the continuous development of injection molding technology and the emergence of high-strength injection molding materials, it will become a trend to replace metal materials with injection molding materials. For the lightweight technology of replacing steel with plastic for auto parts, the current optimal design of auto parts mainly depends on the experience of designers. The qualitative analysis of the product optimization design is relatively conservative, which greatly increases the production cost of the product

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