A method for predicting temperature field of thin-walled components in arc-filling additive manufacturing

Abstract

The invention relates to a method for predicting the temperature field of arc-filled wire additive manufacturing of thin-walled components. And divide the grid; load the heat dissipation boundary conditions and heat source parameters; calculate the model temperature field, extract the thermal cycle parameters and measure the length of the accumulation layer molten pool, compare with the experimental data, and make the maximum error between thermal cycles and the melting pool by fine-tuning the shape parameters of the heat source model The errors between the pool sizes are all smaller than the preset value; the shape parameters of the heat source model are loaded into the numerical model of the thin-walled component to complete the prediction of the temperature field of the arc-filled wire additive manufacturing; The thermal cycle parameters and the molten pool size of the accumulation layer can accurately complete the prediction of the temperature field of arc-filled wire-filled additive manufacturing of thin-walled components, and provide a theory for solving the residual stress and deformation problems caused by arc-filled wire-filled additive manufacturing of thin-walled components. Base.

Description

technical field [0001] The invention belongs to the field of arc-filled wire additive manufacturing, and more specifically relates to a temperature field prediction method for arc-filled wire additive manufacturing of thin-walled components based on finite element simulation software. Background technique [0002] In recent years, low-cost and high-efficiency arc-filled wire-filled additive manufacturing technology has attracted extensive attention from researchers. Multi-layer single-channel thin-walled components are a typical structure of metal components manufactured by arc-filled wire additive manufacturing. The forming is completed by using a single heat source with multiple heating modes and adding filling materials layer by layer. During the forming process, the front layer of multi-layer stacked metal preheats the back layer, and the back layer heats and even remelts the front layer, resulting in a complex thermal process for thin-walled components. The complex the...

AI Technical Summary

Problems solved by technology

However, during the forming process, the stacked layers are stacked layer by layer, and the temperature field distribution is relatively complicated. It is far from enough to measure the temperature of the substrate as the verification value of the finite element model. The verification is powerless, which affects the calculation accuracy of the temperature field of arc-filled wire additive manufacturing

Therefore, it is urgent to explore an effective method for predicting the temperature field of the arc-filled wire-filled additive manufacturing process, so as to solve the current difficult problem of accurately predicting the temperature field of the arc-filled wire-filled additive manufacturing process.

Images