SLM equipment and quantitative powder falling device thereof

The utility model provides SLM equipment and a quantitative powder falling device thereof, and belongs to the technical field of rapid forming. The quantitative powder falling device comprises a powder falling shaft connected with a power source, an even number of powder notches are evenly machined in the powder falling shaft in the circumferential direction, the powder falling shaft is located in a powder falling device installation base, and through holes corresponding to the powder notches are formed in the upper end and the lower end of the powder falling device installation base. The upper end of the powder falling device mounting base is connected with a metal powder bin of the SLM equipment, and the lower end of the powder falling device mounting base is connected with a powder laying device of the SLM equipment; the powder falling shaft is driven by the power source to rotate, when the powder notch moves to the topmost end, the powder notch is filled with metal powder falling from the metal powder bin