Manufacturing method and device for ceramic shell core for precision casting

Abstract

The invention belongs to the technical field related to rapid casting and discloses a manufacturing method for a ceramic shell core for precision casting. The method comprises the steps that firstly,modeling is carried out for a ceramic shell core to be manufactured according to a casting structure, and area division is carried out according to precision of the ceramic shell core to be manufactured; secondly, slurry used by corresponding areas of the ceramic shell core to be manufactured, the diameter of extruding heads, the forming speed and the layer height are determined according to the precision requirement, and layered slicing is carried out on the corresponding areas of the ceramic shell core to be manufactured; and thirdly, the multiple extruding heads are adopted for carrying outcollaborative forming on the ceramic shell core to be manufactured, so that the ceramic shell core is obtained. The invention further provides a device for realizing the manufacturing method. According to the device, the multiple extruding heads are arranged, and are controlled independently, the limitation that an existing rapid forming technology can only achieve mixed extrusion forming of a single material or two materials can be overcome, the problem that in the prior art, extruding heads cannot achieve precise positioning, and a blank is scratched can be solved, and forming efficiency and precision are improved.

Description

technical field [0001] The invention belongs to the technical field related to rapid casting, and more specifically relates to a method and a device for preparing a ceramic shell core for precision casting. Background technique [0002] With the rapid development of industries such as aerospace and automobiles, the applicable performance requirements of some parts are more stringent and the structures are more complex. Traditional casting technology has great limitations in forming complex structural parts. Rapid prototyping technologies such as 3DP (Three Dimensional Printing) and SL (Stereolithography), which have continuously achieved breakthroughs, have a single forming material. The applied layered extrusion forming technology can only realize The mixed extrusion of the two materials has limitations for forming complex ceramic shell cores with different precision requirements in different regions. It is urgent to explore a method and device for forming ceramic shell cor...

AI Technical Summary

Problems solved by technology

Traditional casting technology has great limitations in forming complex structural parts. Rapid prototyping technologies such as 3DP (Three Dimensional Printing) and SL (Stereolithography), which have continuously achieved breakthroughs, have a single forming material. The applied layered extrusion forming technology can only realize The mixed extrusion of two materials has limitations for forming complex ceramic shell cores with different precision requirements in different regions. It is urgent to explore a method and device for forming ceramic shell cores by multi-head layered extrusion.

Existing technology has a multi-head 3D printer extrusion device. In this technology, the material residue in the leakage component hole will contaminate other barrels, and the extrusion heads set on the same plane may scratch the formed body. There is another problem: The relative position deviation of different extrusion head assemblies may deviate from the predetermined working trajectory and cannot be fine-tuned and corrected, which is not conducive to improving the forming accuracy

The above method and device theoretically meet the requirements of multi-nozzle and multi-material forming, but the integrity and precision of the formed body are not high, and the structure prepared by it cannot meet the increasingly stringent requirements of forming accuracy

Images