Method, system and device for designing tuyere of selective laser melting device and medium

Abstract

The invention discloses a tuyere design method, system and device for a selective laser melting device and a medium. The method comprises the steps that the design size of a tuyere of the selective laser melting device is obtained; designing the height of the air flow channel according to the size of the air inlet pipeline, and designing a diversion area and a static pressure area according to the design volume and the height of the air flow channel; the frictional resistance coefficient of the gap air outlet grille is obtained, and the shape of the main flow channel is designed according to the frictional resistance coefficient, so that air pressures on all sections of the flow guide area are equal; and designing a simulation model according to the shape of the main runner, verifying the tuyere, and printing the tuyere after the verification is passed. According to the invention, the problem of non-uniform air outlet of the large-breadth selective laser melting tuyere can be solved, the tuyere with basically consistent air outlet air flow at each position of the porous screen plate can be efficiently designed under the condition of reducing the air speed kinetic energy loss as much as possible, and the removal of smoke dust and spatter in the large-breadth selective laser melting process is met; the method can be widely applied to the field of laser additive manufacturing.

Description

technical field [0001] The invention relates to the field of laser additive manufacturing, in particular to a tuyere design method, system, device and medium of a laser selective melting device. Background technique [0002] Additive manufacturing technology is a processing technology that prints materials layer by layer through 3D digital modeling. Among them, powder bed 3D printing technology is currently one of the more mature and main 3D printing forming technologies. During processing, a layer of material powder is evenly spread on the processing plane, and the control system controls the laser output laser, and the laser is concentrated on the powder layer through the vibrating mirror to scan the processing graphics. The scanned powder is melted and solidified together with the part beneath the powder layer. Through continuous melting, solidification, and superposition of layers of powder, it is finally shaped into the desired product. [0003] The inert gas circula...

AI Technical Summary

Problems solved by technology

With the demand for the manufacture of large aerospace parts such as rockets and aircraft, large-scale laser selective melting equipment (SLM equipment) directly forming large-scale components is the current development direction in the SLM field. The increase in the format and the increase in the number of lasers will affect the air outlet. The design poses a challenge. The traditional design of the splitter plate is difficult to control the uniformity of the air outlet of the large-sized SLM equipment. The uneven air outlet needs to be redesigned, resulting in waste of materials and increased trial and error costs.

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