Additive manufacturing method

Abstract

The invention belongs to the technical field related to additive manufacturing, and discloses an additive manufacturing method. The additive manufacturing method includes the following steps that (1)an additive manufacturing device is provided, wherein the device includes a laser device and a beam split scanning component which are opposite to each other, the laser device emits a laser beam to the beam split scanning component, the beam split scanning component divides the laser beam into two laser beams including a first laser beam and a second laser beam with different energies, and the power of the first laser beam is smaller than that of the second laser beam; and (2) the first laser beam preheats powder on a device or performs scanning machining on the contour of to-be-formed parts,and the second laser beam performs melt scanning forming on the preheated powder or performs melt scanning forming on powder in the contour, and then processing of the to-be-formed parts is completed.By means of the additive manufacturing method, through cooperative work of the low-power laser beam and the high-power laser beam, the forming accuracy, the surface quality and the forming efficiencyare improved, and the microstructure and mechanical properties are improved.

Description

technical field [0001] The invention belongs to the technical field related to additive manufacturing, and more specifically relates to an additive manufacturing method. Background technique [0002] Additive manufacturing technology is based on the principle of discrete accumulation, and under the action of high-energy beams, materials are rapidly accumulated point by point and layer by layer to form a pre-set three-dimensional entity. Metal additive manufacturing technology, as one of the most potential additive manufacturing technologies, is a technology that uses high-energy beams to melt metal powder according to a specific scanning path, process layer by layer, accumulate layer by layer, and rapidly form entities. Since this technology does not require traditional tools and fixtures and multiple processing procedures, it can quickly and precisely manufacture parts of any complex shape, realize the "free forging" of parts, solve the forming of many complex structural pa...

AI Technical Summary

Problems solved by technology

[0003] However, with the rapid development of this technology, corresponding shortcomings have also been exposed: low forming efficiency, forming accuracy that cannot be compared with traditional processing methods, limited applicable materials, internal defects such as pores and cracks cannot be completely avoided, etc., especially forming Low efficiency and low precision limit the further development of metal additive manufacturing technology

Generally, low processing efficiency can achieve high precision, but reduces the forming efficiency. By increasing the power, the forming efficiency can be improved, but high power will reduce the precision

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