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

Abstract

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 if the proportion of one material is larger than the sum of other materials, at the moment, the powder supply cylinder and mechanical arm structure combined powder supply mode can also be adopted, and due to the fact that the mechanical arm structure is simple and rapid in material replacement, the powder laying efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of metal 3D printing, and specifically relates to a device composed of a mechanical arm and a novel powder supply system and a method for realizing multi-material molding. Background technique [0002] Selective laser melting (SLM) is one of the additive manufacturing (AM) technologies and has broad prospects for development. Due to the use of laser beams and metal powder as manufacturing tools, product development and manufacturing cycles are greatly shortened. SLM forming technology can be used to directly produce metal parts with high relative density, excellent mechanical properties, high dimensional accuracy and excellent surface quality. Compared with traditional processing techniques, SLM can form arbitrarily complex metal parts, limited by the shape of the part. It shows clear advantages in metal materials and parts with complex shapes, which are difficult to process by conventional techniques. ...

AI Technical Summary

Problems solved by technology

[0006] The present invention mainly relates to selective laser melting equipment with metal powder as the main processing raw material. The traditional SLM equipment is too single in forming ability, and most of them can only form single-performance parts, and cannot change the gradient of powder type gradually during the forming process. Changed parts solve the problem that the traditional SLM powder coating powder is single and cannot form multi-material structural parts

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