Melt flow control device and method for melting coating forming process

Abstract

The invention discloses a melt flow control device and method for a melting coating forming process. The melt flow control device comprises a crucible smelting unit, a melting coating head, an air pressure driving unit, a jet flow starting and stopping apparatus, a crucible liquid level ranging module and an industrial computer. A water-cooling top cover is positioned above a smelting crucible, and the melting coating head is arranged below the smelting crucible; the crucible smelting unit communicates with the air pressure driving unit; and the jet flow starting and stopping apparatus drives a starting and stopping control rod to press downwards or lift upwards so as to start and stop jet flow. Pressure control adopts three stages: a computer sends spraying pressure to a PLC according to a pressure-flow function relationship, the PLC receives a melt liquid level signal from a laser ranging module and the spraying pressure of the industrial computer at the same time and sends an air pressure control instruction to a pressure controller, the pressure controller realizes real-time control over the air pressure in a crucible, therefore, accurate control over the jet flow in the forming process is achieved, and high-precision and high-efficiency coating forming of a target part is completed.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing (3D printing), and relates to a 3D printing head and a flow control method thereof, in particular to a 3D printing head for metal material coating and forming and a flow control method thereof. Background technique [0002] Additive manufacturing technology (also known as "3D printing") is rapidly changing traditional production and lifestyles. Its core idea is to discretize three-dimensional parts in two dimensions to form layered data. According to the layering of the three-dimensional CAD model of the part Data, the discrete forming materials are gradually combined to form layered cross-sections, and then piled up layer by layer to form solid parts. The parts can be directly manufactured without molds, which can greatly reduce costs and shorten the development cycle. At present, the methods for additive manufacturing of metal materials are mainly divided into three categories bas...

AI Technical Summary

Problems solved by technology

The same method also has a big disadvantage, that is, the flow start and stop cannot respond quickly, and it often takes several seconds

The reason for the large time lag is mainly because the pressure gas above the crucible has a certain volume, and the pressure increase or decrease is realized by inflating and pumping, and this process takes a certain amount of time.

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