Partial high-temperature protection system in laser selective melting forming room

Abstract

A partial high-temperature protection system in a laser selective melting forming room comprises a high-temperature heat insulation cover. The high-temperature heat insulation cover is mounted on theinner rear wall of the laser selective melting forming room through two supports. A water cooling device is arranged above the high-temperature heat insulation cover and is mounted on the inner top face of the laser selective melting forming room. A galvanometer system is arranged at the position, corresponding to the water cooling device, of the top of the laser selective melting forming room. Aninfrared thermometer is arranged on the left side of the galvanometer system. A printing working platform is arranged below the high-temperature heat insulation cover. A powder pavement device is located on a working table of the laser selective melting forming room. According to the partial high-temperature protection system, the high-temperature protection function within the forming area partial range in the forming room in laser selective melting equipment is achieved, the heat utilization rate and the partial dust removal rate are increased, and the system is also suitable for vacuum environment 3D printing forming.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a local high temperature protection system in a laser selective melting forming room. Background technique [0002] Due to the outstanding advantages of laser selective melting (SLM) in the preparation of high-performance and high-precision complex parts, it has become one of the hot spots in the field of additive manufacturing technology research. The core feature of laser selective melting technology is layer-by-layer processing, so as to realize the free forming of parts, and realize the shape-controlled manufacturing of parts according to the use requirements of parts. [0003] However, due to the large temperature change rate of the workpiece during the laser selective melting process, the rapid melting and solidification of the metal powder can easily cause thermal stress concentration, resulting in warping, deformation, and cracking of the workpi...

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Problems solved by technology

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a local high temperature protection system in the laser selective melting forming room, which can effectively solve the problem of heat protection in the forming room of the equipment during the high temperature SLM printing process, and enhance the accumulation of heat in the forming area. Improve heat utilization efficiency, so as to realize laser selective melting and high temperature heating, and finally improve the warping, deformation, cracking, etc. soot

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