| 飞机整体壁板广义槽分层识别方法及其实现算法(英文) |
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| 作者单位： | 北京航空航天大学机械学院，北京装甲兵工程学院机械系，沈阳飞机工业(集团)有限公司，北京中科辅龙计算机技术有限公司 |
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| 摘 要： | To automatically obtain a machining area in numerical control （NC） programming, a data model of generalized pocket is established by analyzing aircraft integral panel characteristics, and a feature recognition approach is proposed. First, by reference to the practical slice-machining process of an aircraft integral panel, both the part and the blank are sliced in the Z-axis direction; hence a feature profile is created according to the slicing planes and the contours are formed by the intersection of the slicing planes with the part and its blank. Second, the auxiliary features of the generalized pocket are also determined based on the face type and the position, to correct the profile of the pocket. Finally, the generalized pocket feature relationship tree is constructed by matching the vertical relationships among the features. Machining feature information produced by using this method can be directly used to calculate the cutter path. The validity and practicability of the method is verified by NC programming for aircraft panels.
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| 关 键 词： | 数字控制 航天器 特征提取 计算机半自动化制造业 |
| 收稿时间： | 27 December 2007 |
Slicing Recognition of Aircraft Integral Panel Generalized Pocket |
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| Authors: | Yu Fangfang Du Baorui Ren Wenjie Zheng Guolei Chu Hongzhen |
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| Institution: | aSchool of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;bDepartment of Mechanical Engineering, Beijing Armored Force Engineering Institute, Beijing 100072, China;cShenyang Aircraft Co. Ltd, Shenyang 110034, China;dBeijing Zhongke Fulong Computer Technology Co. Ltd, Beijing 100085, China |
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| Abstract: | To automatically obtain a machining area in numerical control (NC) programming,a data model of generalized pocket is estab-lished by analyzing aircraft integral panel characteristics,and a feature recognition approach is proposed.First,by reference to the prac-tical slice-machining process of an aircraft integral panel,both the part and the blank are sliced in the Z-axis direction; hence a feature profile is created according to the slicing planes and the contours are formed by the intersection of the slicing planes with the part and its blank.Second,the auxiliary features of the generalized pocket are also determined based on the face type and the position,to correct the profile of the pocket.Finally,the generalized pocket feature relationship tree is constructed by matching the vertical relationships among the features.Machining feature information produced by using this method can be directly used to calculate the cutter path.The validity and practicability of the method is verified by NC programming for aircraft panels. |
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| Keywords: | numerical control aircraft integral panel feature extraction computer aided manufacturing |
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