Selective laser fusion molding equipment for ceramic material

Abstract

The invention discloses selective laser fusion molding equipment for a ceramic material. A closed molding and processing cabin for forming a worktable is arranged in the equipment. According to the equipment, lifting motion of a molding cylinder is replaced by vertical motion of a scraper, a height adjusting device of the scraper is controlled by an industrial personal computer, a vacuum pump and an argon supply device are respectively conducted with the closed cabin through a pipeline; a laser scanning system is arranged on an upper surface of the closed cabin; a dynamic focusing system and a galvanometric scanning system in the laser scanning system are controlled by the industrial personal computer so as to realize real-time focusing; an induction heating system is arranged below the lower surface of the cabin, namely the worktable surface and is similarly controlled by the industrial personal computer, so that constant temperature heating can be realized. Preheating is performed through induction heating, the problem that ceramics are easily cracked due to extremely high temperature gradient in the molding process is solved, the oxygen content is strictly controlled due to atmosphere protection, influence on the performances of the parts of the equipment is avoided, and the whole equipment is simple and is conveniently sealed due to a special powder spreading structure.

Description

technical field [0001] The invention relates to the field of laser melting forming equipment, in particular to a laser melting forming device capable of directly performing selective laser melting (Selective Laser Melting, SLM) forming on ceramic materials. Background technique [0002] With the development of economic globalization, especially the rapid development of aerospace, biomedical and other fields, it has brought great challenges to the manufacturing industry. Various bold and innovative designs and more and more complex product features such as curved surfaces, porous structures, and hollow structures New manufacturing technology support is needed. SLM is an additive manufacturing technology that uses lasers to selectively layer-melt solid powder and solidify the molten layer to manufacture complex parts. Due to the processing characteristics of rapid melting and instantaneous solidification of powder by laser irradiation in the SLM forming process, the mechanica...

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Problems solved by technology

The patent application "a powder spreading device for laser melting forming equipment" submitted by the applicant of the present invention improved the conventional powder spreading equipment in terms of temperature gradient control to adapt to ceramic materials, but did not consider high temperature preheating for the forming equipment as a whole The influence brought by it, such as the possible oxidation failure caused by high temperature on the substrate and surrounding components, etc., so it cannot be directly applied to general forming equipment

In foreign countries, only the equipment produced by PHENIX company can form cermet materials, and the ceramic SLM forming equipment with high temperature preheating has not been reported yet.

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