Melt flow control device and method for melt coating forming process

Abstract

The invention discloses a melt flow control device and method for a fusion coating forming process, comprising a crucible melting unit, a fusion coating head, an air pressure drive unit, a jet flow start-stop device, a crucible liquid level ranging module and an industrial computer . The water-cooled top cover is located above the melting crucible, and the molten coating head is placed below the melting crucible; the melting unit of the crucible is connected with the air pressure drive unit; the jet start-stop device drives the start-stop control lever to press down or lift up to realize the start and stop of the jet flow. stop. The pressure control adopts three-level division of labor: the computer sends the injection pressure to the PLC according to the pressure-flow function relationship, and the PLC simultaneously receives the melt level signal from the laser ranging module and the injection pressure of the industrial computer, and sends the air pressure control command to the pressure The controller, the pressure controller realizes the real-time control of the gas pressure in the crucible, so as to realize the precise control of the jet flow during the forming process, so as to complete the high-precision and high-efficiency coating forming of the target parts.

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 layer 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 based...

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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