A powder curtain-based laser capture additive manufacturing device and manufacturing method
A technology of additive manufacturing and powder curtain, which is applied in the field of laser capture additive manufacturing devices, can solve the problems of insufficient flexibility, high forming precision, and low precision of laser three-dimensional forming technology
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Embodiment 1
[0025] Embodiment 1 A powder curtain-based laser capture additive manufacturing device according to the present invention includes:
[0026] The laser emitting unit is installed on the machine tool or manipulator and other moving mechanisms, and the light outlet of the laser emitting unit is aligned with the powder curtain formed by the powder-carrying airflow, and is used for laser irradiation of the powder in the powder-carrying airflow; the control terminal of the laser emitting unit Electrical connection or signal connection with the control terminal;
[0027] The powder feeding unit includes a powder feeding part and a powder carrier gas control part, wherein the powder outlet of the powder feeding part is connected with the powder feeding port pipeline of the powder carrier gas control part; the powder carrier gas control part includes a powder carrier part and an air extraction part , wherein the powder-carrying part and the pumping part are symmetrically installed on b...
Embodiment 2
[0034] In Example 2, it is necessary to model with computer modeling software before additive manufacturing, and use the segmentation software to perform layered slice discrete processing on the three-dimensional model of the part. Since the layers are layered on the surface, it is necessary to follow the same angle as the curvature of the surface After layering, each layer needs to be flattened after layering and slicing. Since the distance between the powder outlet 15 on both sides and the air inlet 12 is limited, it is also necessary to divide the cross section of each layer into long strips with the same width to obtain The scanning path of each layer of laser light guides the device to print layer by layer.
[0035] After understanding the creation process and structure of the present invention, its application is now illustrated: assuming that the shape is as image 3As shown in the figure above, it is necessary to slice the part of additive manufacturing layer by layer,...
Embodiment 3
[0036] Embodiment 3 A manufacturing method based on a powder curtain-based laser capture additive manufacturing device described in Embodiment 1, comprising the following steps:
[0037] 1) Under the laser head, a stable powder-carrying airflow parallel to the substrate 19 is formed at the powder feeding nozzle and the air suction port through the powder feeding device, so as to realize a steady-state flowing powder curtain 18 above the substrate;
[0038] 2) The laser head is turned on under the control of the console, and the emitted laser beam scans the powder curtain. When the laser irradiates the powder particles, the light-facing surface of the particles is heated rapidly to generate vaporization, and the impact force generated by vaporization gives the particles a downward force to make the particles Moving towards the substrate, the laser scanning through the powder curtain creates a molten pool 191 on the substrate 19;
[0039] 3) The particles moving downward enter t...
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