CAJ | 학술논문

陶瓷铸型是制造空心叶片的核心，相对于熔模铸造主流技术，基于光固化成型技术的一体化陶瓷铸型制造方法具有显著的优势：周期短、成本低、响应快，但如何控制铸型的缺陷是该方法发展的技术难题。为此，研究光固化原型台阶效应的解决方法，探讨铸型精细结构的凝胶注模复型行为，分析脱脂过程热应力对铸型质量的影响规律。结果表明：基于液态石蜡的流平性原理，可解决光固化树脂原型的台阶效应问题，显著减小原型表面粗糙度；随温度升高，覆膜RP60石蜡单层厚度减小，90℃时稳定在0.06 mm左右；当陶瓷浆料固相体积分数不大于62%时，可实现0.5 mm细小特征陶瓷铸型的凝胶注模真空无缺陷复型；通过镂空处理，脱脂陶瓷铸型无缺陷、精度较高。
도자주형시제조공심협편적핵심，상대우용모주조주류기술，기우광고화성형기술적일체화도자주형제조방법구유현저적우세：주기단、성본저、향응쾌，단여하공제주형적결함시해방법발전적기술난제。위차，연구광고화원형태계효응적해결방법，탐토주형정세결구적응효주모복형행위，분석탈지과정열응력대주형질량적영향규률。결과표명：기우액태석사적류평성원리，가해결광고화수지원형적태계효응문제，현저감소원형표면조조도；수온도승고，복막RP60석사단층후도감소，90℃시은정재0.06 mm좌우；당도자장료고상체적분수불대우62%시，가실현0.5 mm세소특정도자주형적응효주모진공무결함복형；통과루공처리，탈지도자주형무결함、정도교고。
The cceramic mold is crucial for manufacturing hollow turbine blade. Obvious advantages of manufacturing integral ceramic mold based on stereo lithography (SL) are short cycle, low cost and rapid responding compared with investment casting, but how to control the fabrication defects of ceramic mold is a technological challenge for its development. The solution method for the step effect of SL prototype is researched, the gel-casting behavior of tiny structure in vacuum is discussed, and the influence of thermal stress is analyzed in the degreasing process. Result shows that the step effect of SL prototype is solved based on the principle of flowing property of liquid wax, and its surface roughness is remarkably improved; with the temperature increasing, the single-layer thickness of coating RP60 wax decreases, reaching a minimum of 0.06 mm at 90℃;with the solid content of ceramic slurry being less than 62%, acceptable filling result of tiny structure (0.5 mm) gel casting in vacuum can be realized. By hollowing out the SL prototype, the integral ceramic mold is fabricated with high accuracy and defect-free after degreasing.