Thin-walled component arc wire filling additive manufacturing temperature field predicting method

Abstract

The invention relates to a thin-walled component arc wire filling additive manufacturing temperature field predicting method. The method includes the steps that a stacking condition of a thin-walled component is determined; a thermal cycle curve is measured; the shape of any stacking layer molten pool above a second stacking layer is observed; a model is built and grids are divided; a heat dissipation boundary condition and a heat source parameter are loaded; a model temperature field is calculated, a thermal cycle parameter is extracted, the length of the stacking layer molten pools is measured, and compared with test data, the maximum error of thermal cycles and size errors of the molten pools are all smaller than preset values through a fine-tuning heat source model shape parameter; the fine-tuning model shape parameter is loaded in a numerical model of the thin-walled component, and arc wire filling additive manufacturing temperature field predicting is completed. The numerical calculation method is adopted, by comparing the thermal cycle parameters on a substrate with the sizes of the molten pools of the stacking layers, thin-walled component arc wire filling additive manufacturing temperature field predicting is accurately completed, and a theoretical basis is provided for solving residual stress and deformation problems caused in the thin-walled component arc wire filling additive manufacturing process.

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.

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