Simulation processing method of component scale in additive manufacturing process based on Euler grid

Abstract

The invention provides a method for simulating and processing component scales of an additive manufacturing process based on Euler grids, and belongs to the field of modeling and simulation of additive manufacturing. The simulation of the traditional component scale has problems such as low accuracy or excessive calculation amount. In order to realize high-fidelity and efficient modeling of the solid heat transfer process, the present invention uses Euler grids to discretize the calculation domain. A finer grid is used within the layer, while a coarser grid is used in other areas. When the printing layer height of the component increases, its vertical position is moved downward by constructing a specific convective transport equation, so that the laser spot is always located in the finely divided area at the top of the domain. On the premise of ensuring that the laser heat source has sufficient grid resolution, not only the overall grid volume is reduced, but also the grid does not need to be dynamically reconfigured. In the heat transfer modeling, a parameter representing the printing state is introduced, so that the simulation processing method can automatically and orderly process the laser printing of the component layer and the downward movement of the component after a certain layer of printing is completed.

Description

technical field [0001] The invention relates to the field of additive manufacturing modeling and simulation, in particular to a method for simulating and processing component scales of additive manufacturing processes based on Euler grids. Background technique [0002] Additive manufacturing is also known as 3D printing. Different from the traditional manufacturing mode, additive manufacturing is a kind of "bottom-up" through the layer-by-layer accumulation of materials to realize the rapid prototyping of components, which makes it possible to manufacture components with complex structures. The most widely used technology in current 3D printing molding is to use a finely focused spot to quickly melt the pre-set metal powder to directly obtain parts of arbitrary shape and close to complete density. [0003] Numerical simulation is an effective means to study the mechanism of additive manufacturing process. Especially efficient simulation of heat transfer during 3D printing ...

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Problems solved by technology

[0004] The technical purpose to be achieved by the embodiments of the present invention is to provide a method for simulating the dimensions of additive manufacturing process components based on Eulerian grids, so as to solve the scale difference between the forming components and the laser heat source in the current typical laser additive manufacturing process Huge, the solid heat transfer simulation of the traditional molding process has grid resolution problems, resulting in problems such as low simulation accuracy or excessive calculation

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