自由曲面铣削加工超差区域自适应提取算法  

Novel Approach of Error Region Determination in Machining of Aero-Engine Blades

作　　者：马瑞雪[1] 张定华[2] 马光辉[3] 

机构地区：[1]西安航空学院,西安710077 [2]西北工业大学,西安710068 [3]西安航空发动机(集团)有限公司,西安710021

出　　处：《重庆理工大学学报（自然科学）》2015年第7期29-34,共6页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(70931004)

摘　　要：航空发动机叶片的型面是由自由曲面构成,其特殊性能决定了测量路径沿着设计截面线或者参数曲线,并以此评估加工质量。叶片在精加工之后,如果存在检测点超过设计容差的情况,则需要进一步加工以满足叶片的设计要求。为提高加工效率,降低加工成本,仅针对加工误差区域进行进一步的加工,因此如何准确地对误差区域进行提取就成了关键。在叶片的加工过程中,针对铣削加工,分析叶片型面特点,采用基于图形学的方法对叶片的误差区域进行提取,并用实例验证了该方法的有效性。Aero-engine blades are formed by free-form surfaces and its special performance determines the probe path along design section or parameterized curve to assess machining quality. Extra machining is needed to remove additional materials so as to meet the requirements of application if some detect points that are out of design tolerance band. In order to reduce machining time, the extra machining covered only the error region instead of the whole surface. Thus, the error region determination becomes the key problem. A novel approach based on graph theory was used to obtain regular region. And an example of one aero-engine blade verified the efficiency of the present approach.

关 键 词：误差区域提取 自适应网络 数控加工 自由曲面 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程]