摘要
航天发动机中许多大型管路构件由高温合金制成,对高温合金曲面构件进行精密机械加工是实现航天发动机燃气管路系统减质的重要途径。然而,这类零件常采用热锻工艺加工毛坯,该工艺加工后的构件具有变形大、难切削的特点,二者共同作用加剧了机械加工的复杂度。国内外学者在自适应加工理论、曲面路径规划算法、模型重构方法等方面开展了理论与试验研究,取得了诸多成果。目前,对于高温合金自适应加工变形分析与误差补偿理论解析方法尚不明确,精确物理模型重构技术尚不成熟,工程应用尚未普及。为此,针对锻压成形后的高温合金管件毛坯机械加工领域,提出一种基于模型设计基准的快速配准方法和基于内曲面的精确配准算法、结合曲面数字化测量技术,完成大型管路构件自适应加工工艺模型重构,并通过加工试验验证技术可行性。
Many large pipeline components in an aerospace engine are made of superalloy.Precision machining of superalloy curved surface components is an important way to achieve the weight reduction of the aerospace engine's gas pipeline system.However,this type of components often uses the hot forging technique to process blanks,and the components processed with the technique have large deformation and difficulties in cutting,which jointly exacerbate the complexity of mechanical processing.Domestic and foreign scholars have conducted fruitful theoretical and experimental study of adaptive machining theory,curved surface path planning algorithms and model reconstruction methods.At present,the theoretical analysis methods for deformation analysis and error compensation in the adaptive machining of high-temperature alloys are not clear;The precise physical model reconstruction technology is not yet mature and engineering applications are not yet popularized.Therefore,this article proposes a precise registration algorithm for the mechanical processing of superalloy pipeline blanks after forging and forming based on inner curved surface.Combined with digital measurement techniques of curved surfaces,it achieves the adaptive processing model reconstruction of large pipeline components.The technical feasibility is verified through curved surface model reconstruction and adaptive processing experiments.
作者
罗子彦
秦现生
王战玺
刘维伟
李树禄
LUO Ziyan;QIN Xiansheng;WANG Zhanxi;LIU Weiwei;LI Shulu(School of Mechanical Engineering,Northwestern Polytechnical University,Xi'an 710072,China)
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2024年第5期801-808,共8页
Journal of Northwestern Polytechnical University
关键词
自适应加工
有限元分析
模型重构
模型配准
adaptive machining
model reconstruction
model registration
model registration
