基于熔模铸造的叶片内塌陷结构设计

Design of Blade Internal Collapse Structure Based on Investment Casting

针对3D打印模型代替熔模铸造中的蜡模,对于型壳的破碎率大的问题,提出一种基于材料的热物性差异而设计的内塌陷结构。并以具有复杂型面的叶片零件为例,将此内塌陷结构嵌入到叶片结构中,通过3D打印试样并结合后续熔模环节进行工艺设计。测试表明,具有内塌陷结构的叶片压缩强度较中空结构显著增强,且在后续熔模铸造时型壳的破碎率显著降低。

In order to solve the problem that the 3D printing model replaces the wax model in the molten mold casting to result in the large expansion and fracture rate of the mold shell during investment casting,a kind of internal collapse melting mold structure based on the thermal property difference of materials was proposed.Taking the complex blade parts as an example,the internal collapse structure was embedded into the blade structure,and the sample was printed through 3D printing and the subsequent process design was combined with the subsequent dewaxing process.The results show that the compressive strength of the blade with internal collapse structure is significantly higher than that of the hollow structure,and the crushing rate of the shell with internal collapse structure is decreased significantly in the subsequent dewaxing process.