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针对燃气轮机叶片熔模铸造过程复杂、周期长、成本高等问题,利用3D打印熔融沉积技术打印ABS模型,粘接蜡模浇注系统组成模组,经过涂挂涂料、高压釜脱ABS和焙烧获得完整的叶片型壳,并采用工业内窥镜对其型腔内部进行检测后浇注金属液。采用三维光学扫描方式对铸件的整体尺寸和其叶型截面的关键尺寸偏差值进行检测。试验表明,采用熔融沉积技术打印叶片模型进行快速熔模铸造能够满足铸造要求,为燃气轮机叶片样件熔模铸造提供一种时间短、成本低、可靠性高的新方法。
In view of the complexity, long cycle and high cost of gas turbine blade investment casting process, the ABS model was printed by 3D printing fusion deposition technology, the wax mold casting system was bonded to form a module, and the complete coating was coated with paint, autoclave ABS and roasting Vane-type shell, and the use of industrial endoscope cavity for testing after pouring liquid metal. The three-dimensional optical scanning method was used to detect the overall size of the castings and the critical dimension deviation of the blade cross section. Experiments show that the use of fused deposition technology to print the blade model for rapid investment casting can meet the casting requirements for the gas turbine blade sample investment casting a short time, low cost and high reliability of the new method.