Light curing 3D printing preparing method for complex double-wall silicon-based ceramic core

Abstract

The invention relates to the field of precise casting and particularly relates to a light curing 3D printing preparing method for a complex double-wall silicon-based ceramic core for investment casting. The method comprises the steps that firstly, silicon-based ceramic core paste with high solid content, high printing performance and more stable and more excellent flow settling performance is prepared; secondly, a three-dimensional model of the complex double-wall silicon-based ceramic core is obtained according to a single crystal hollow double-wall engine blade needing to be obtained, and the core three-dimensional model is subjected to slicing treatment and light curing 3D printing path programming; thirdly, an STL file of the core is imported into a light curing 3D printer, printing iscarried out layer by layer in combination with the silicon-based ceramic core paste prepared in the first step, and a light cured double-wall core biscuit is obtained; and fourthly, the core biscuitis subjected to drying and sintering processes, and the light cured 3D printed complex double-wall silicon-based ceramic core is obtained. The complex double-wall silicon-based ceramic core is used for precise casting of the hollow engine blade and replaces a double-wall core which is complex in working procedure and needs to be manufactured through multiple dies in traditional investment casting.

Description

technical field [0001] The invention relates to the field of precision casting, in particular to a preparation method for light-cured 3D printing of a complex double-walled silicon-based ceramic core for investment casting, which is suitable for precision casting of hollow engine blades and replaces the need for complex procedures in traditional investment casting The processing method of the double-wall core made by the set mold. Background technique [0002] In "Made in China 2025", the US "National Advanced Manufacturing Strategic Plan", the European Space Agency's "Amazing Project", Japan's "Additive Manufacturing Research Program", Singapore's "Industrial Additive Manufacturing Project" and the European Union's "3D Printing Standardization Roadmap" Under the opportunity of the rapid development of global new manufacturing technology, additive manufacturing technology integrates computer-aided design, material processing and forming technology, based on digital model fil...

AI Technical Summary

Problems solved by technology

With the improvement of the thrust-to-weight ratio requirements of aero-engines, based on the basic principles of fluid dynamics and heat transfer mechanics, the design of the inner cavity of the engine blades is becoming more and more complex, which puts more stringent requirements on the performance of the core. The traditional process of preparing high-complexity double-layer Silicon-walled silicon-based cores and precision silicon-based cavities require multiple sets of molds. The process is complicated and the cost is extremely high. Therefore, how to prepare complex double-walled light-cured silicon-based ceramic cores has become one of the problems that need to be solved urgently in this technology.

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