Dual-cylinder tabletop-type selective laser melting molding equipment and dual-cylinder tabletop-type selective laser melting molding method

Abstract

The invention discloses dual-cylinder tabletop-type selective laser melting molding equipment and a dual-cylinder tabletop-type selective laser melting molding method. The dual-cylinder tabletop-type selective laser melting molding equipment comprises a sealed molding chamber, an optical transmission system, a powder spreading device, a molding cylinder and a powder cylinder, wherein a molding platform is arranged on the upper part of the molding cylinder and the powder cylinder; a movable platform is arranged above the molding platform; the molding platform serves as a guide rail of the movable platform, so that the movable platform can move left and right on the molding platform; the molding platform is provided with a powder spreading device and a powder acquiring system; the powder acquiring system comprises a powder acquiring base platform and a powder acquiring barrel, the powder acquiring barrel is arranged on the upper part of the powder acquiring base platform. Aiming at key points of a direct precious metal molding system, namely powder recovering and clearing, the dual-cylinder tabletop-type selective laser melting molding equipment is provided with the powder acquiring structure which can be completely taken out easily, and no powder is remained on the inner corners of the molding cylinder/powder cylinder, so that material wastes in a molding process are reduced, and the dual-cylinder tabletop-type selective laser melting molding equipment can be applied to direct molding of individual parts made of precious metals such as gold, silver and platinum in the bijouterie industry.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing of metal parts, in particular to a double-cylinder desktop type laser selective melting forming equipment and method. Background technique [0002] Selective Laser Melting (SLM) technology, also known as "metal 3D printing technology", is the cutting-edge technology of additive manufacturing. It uses a focused laser beam with a diameter of 30-50 microns to melt metal or alloy powder layer by layer and accumulate it into A metallurgically bonded, densely-structured entity, resulting in functional metal parts of almost any shape with complete metallurgical bonding. [0003] SLM equipment is mainly composed of laser, optical path system, sealed forming chamber, mechanical transmission system, control system and other parts. The process flow is as follows: firstly, the 3D CAD model is sliced ​​discretely and the scanning path is planned to obtain the slice profile information that can ...

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Problems solved by technology

[0004] An important factor restricting the direct forming of precious metals is that the material is expensive and the size is generally small. The size of the existing SLM equipment currently on the market is generally above 100×100mm, which is not suitable for precious metals.

Moreover, the existing equipment does not pay more attention to the problem of powder waste in the process of powder recovery and cleaning, which is unacceptable for precious metals

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