Device and method for achieving multi-material additive manufacturing forming based on SLM equipment

The invention discloses a device and method for achieving multi-material additive manufacturing forming based on SLM equipment. The device comprises a forming chamber, a forming cylinder, a powder laying device, a powder supply bin, a laser and a powder supply system. The forming cylinder, the powder laying device and the powder supply bin are all arranged in the forming chamber, and the powder supply system is communicated with the powder supply bin through a powder conveying pipeline. The powder supply bin is installed at the tail end of a mechanical arm, and the powder laying device is arranged above the forming cylinder and is driven by a transmission device to horizontally move in the forming chamber. A powder supply device combining a traditional powder supply cylinder and the mechanical arm is adopted, when a single material is used, the traditional powder supply cylinder is used for supplying powder, when two or more materials are formed, a mechanical arm structure powder feeding device is used, and i