Novel powder-laying system for selective laser melting and forming device

Abstract

The invention provides a novel powder-laying system for a selective laser melting and forming device. The novel powder-laying system for the selective laser melting and forming device comprises a worktable, a powder feeding device, a powder laying device, a linear motor, a sliding block, a base plate, a guide rail, a Z-direction servo motor, a lead screw, a lead screw nut, a lifting plate, a connecting rod, a forming cylinder, a heating plate and a resistance wire heating device; a forming cylinder through hole is formed in the center of the worktable, the guide rail is arranged on the worktable, the sliding block is arranged on the guide rail, and the powder laying device is arranged on the sliding block; the linear motor is arranged on the right side of the guide rail and drive the powder laying device to conduct a linear motion, the powder feeding device is arranged on the worktable and is located at the right side of the guide rail, and the forming cylinder is arranged in the forming cylinder through hole; a heating groove is formed in the upper end of the forming cylinder, and the lifting plate is fixed on the lead screw nut which is arranged on the lead screw; the lead screw is connected with a rotating shaft of the Z-direction servo motor, the connecting rod is arranged on the lifting plate, and the upper end of the connecting rod penetrates through the bottom face of the forming cylinder; and the heating plate is arranged on the upper end of the connecting rod, the base plate is fixed on the heating plate, and the resistance wire heating device is arranged in the heating plate.

Description

technical field [0001] The invention relates to an additive manufacturing technology, in particular to a novel powder spreading system for laser selective melting forming equipment. Background technique [0002] Selective Laser Melting (SLM) technology has developed rapidly, and the industrialization of metal SLM has begun to advance globally. This technology is based on the basic idea of ​​rapid prototyping, that is, layer-by-layer manufacturing and layer-by-layer superimposed manufacturing methods. Parts with specific geometric shapes are directly formed according to the 3D CAD model. The forming process is not limited by the complexity of the parts, and it has high forming accuracy. Compact, simple process and other technical advantages. [0003] The powder spreading system of the existing industrial SLM forming equipment is mainly composed of a powder feeding device, a forming device, a recovery device, a powder spreading device and corresponding supports, and is used f...

AI Technical Summary

Problems solved by technology

On the one hand, the existing powder spreading system uses a powder feeding cylinder placed parallel to the contour of the forming cylinder to achieve powder feeding, and there are problems such as that powder cannot be added during the forming process, and powder recovery is inconvenient.

The inventions with patent application numbers 211310667164.1 and 211521759859.9 respectively introduced the impeller-feeding SLS forming powder spreading system and the gear-feeding SLM forming two-way powder spreading system, but there are problems such as difficult control of the powder feeding amount and difficult sealing

On the other hand, the current SLM powder spreading system often only uses a scraper or a powder spreading roller as a powder spreading device, and there is no report on SLM equipment that can replace the powder spreading device, and the equipment is difficult to support the forming and processing of various materials

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