selective laser melting(SLM) 3D printer

Abstract

The invention discloses a selective laser melting (SLM) 3D printer. The SLM 3D printer comprises an air protection tank and a computer arranged on the outer wall of the air protection tank; the air protection tank is internally provided with a powder laying forming workbench; two groups of X-axis movement mechanisms are arranged above the powder laying forming workbench; the two groups of X-axis movement mechanisms are connected with a Y-axis movement mechanism; a powder feeding cylinder, a powder laying forming cylinder and a powder recycle cylinder are sequentially arranged on the powder laying forming workbench in an inserting mode; the powder laying forming cylinder is internally provided with a printing substrate plate; a Z-direction movement mechanism used for driving the printing substrate plate to move in the Z direction in the powder laying forming cylinder is arranged on one side of the printing substrate plate; and each group of X-axis movement mechanism is provided with a laser cladding device used for performing selective laser melting on the printing substrate plate and a laser thermal treatment device used for improving metal structure and mechanical properties. TheSLM 3D printer has the beneficial effects that cracks produced in the process of metal solidification are prevented, yield rate is further improved, and meanwhile 3D printing speed is improved to be suitable for mass production.

Description

technical field [0001] The invention relates to a 3D printer, in particular to an SLM3D printer. Background technique [0002] Selective Laser Melting (SLM) is a technology based on the principle of additive manufacturing, which uses a layer-by-layer stacking method to selectively melt preset metal powders through high-power-density lasers. Specifically, first use the 3D modeling software to design the 3D solid model of the part on the computer, and convert it into a data format that can be recognized by the slicing software; secondly, use the slicing software to add support and slice and layer the obtained 3D model to obtain a 3D model. The cross-sectional contour data of the model; then the path planning software performs scanning path processing on the contour data; finally, the acquired path planning data is imported into the laser selection melting equipment, and the industrial computer will control the laser beam selection layer by layer according to the scanning path ...

AI Technical Summary

Problems solved by technology

[0003] Existing SLM3D printers have the characteristics of micro-area melting and solidification. Due to the fast scanning speed of the laser beam and the small molten metal pool, the cooling and solidification speed is extremely fast, and it has a great degree of supercooling, which can easily lead to metal solidification during the solidification process. Cracks are generated, thereby reducing the yield; at the same time, the existing SLM3D printing takes a long time to complete and is not suitable for mass production. Its printing speed is slow and needs to be improved

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