A dual-piston metal laser selective melting forming equipment

Abstract

The invention discloses double-piston metal laser selective melting molding equipment. The double-piston metal laser selective melting molding equipment comprises a main machine body, an auxiliary machine body, a powder cylinder, a scraper motion component and a light path system. The equipment can work in a single-piston state and a double-piston state. Integrated double-piston design is adopted, the equipment can work independently in the single-piston state and the double-piston state, a small piston can be replaced and dismounted to achieve laser molding of metal components of different sizes, and powder is saved; meanwhile, omnibearing heating can be carried out on the powder cylinder, and the powder is controllably preheated, so that the powder is evenly heated, temperature gradient is improved, and component deformation and cracking are relieved.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of additive manufacturing, and in particular relates to a dual-piston metal laser selective melting forming equipment. [0003] Background technique: [0004] Additive manufacturing technology (also known as "3D printing") is a high-end digital rapid manufacturing technology that has developed rapidly in recent years. It is suitable for the near-net shape of complex components. The formed parts manufactured by additive manufacturing technology have excellent mechanical properties. , suitable for rapid prototyping of various materials, and the material utilization rate is high. Selective Laser Melting (SLM) technology is a typical representative of additive manufacturing. It transforms the traditional three-dimensional manufacturing process into a planar manufacturing-cumulative superposition process, and realizes the manufacture of three-dimensional complex precision parts through layer-by-layer melti...

AI Technical Summary

Problems solved by technology

[0006] However, most of the existing laser selective forming equipment is designed with a fixed powder cylinder size. During the forming process, regardless of the size of the part, the entire forming powder cylinder needs to be filled with metal powder, and the powder waste is serious when forming small components.

In addition, the existing laser forming equipment does not consider enough preheating of the metal powder, resulting in low laser absorption rate of the metal at low temperature. At the same time, due to insufficient preheating, it is easy to cause uneven distribution of stress and strain in the internal structure of the formed component, resulting in cracks and warping. Bending deformation and other problems affect the forming quality

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