批量复杂结构毛坯的快速逆向建模技术研究

中国机械工程 ›› 2014, Vol. 25 ›› Issue (14): 1935-1940.

批量复杂结构毛坯的快速逆向建模技术研究

王海舟1;张丽艳1;周良明2;刘胜兰1

1.南京航空航天大学,南京,210016
2.成都飞机工业（集团)有限责任公司,成都,610000

出版日期:2014-07-25 发布日期:2014-08-25
基金资助:
国家自然科学基金资助项目(50875130);中国博士后科学基金资助项目(2012M521076);“十二五”民机专项科研项目（MJ-G-2011-24)

Rapid Reverse Modeling of Batched Complex Blanks

Wang Haizhou1;Zhang Liyan1;Zhou Liangming2;Liu Shenglan1

1.University of Aeronautics & Astronautics,Nanjing,210016
2.AVIC Chengdu Aircraft Industry (Group) Company Ltd.,Chengdu,610000

Online:2014-07-25 Published:2014-08-25
Supported by:
National Natural Science Foundation of China（No. 50875130）;Supported by China Postdoctoral Science Foundation（No. 2012M521076）

摘要/Abstract

摘要：

工程实践中常常需要对结构上相同、几何上彼此有一定偏差的批量复杂结构毛坯逐件进行CAD模型逆向重建，这样重复的操作会浪费大量的人力,制约生产周期。针对此类问题，提出了一种基于结构特征模板和逆向设计表的快速逆向建模方法。该方法首先根据毛坯结构的特点制定结构特征模板、创建基于开放式知识表示的逆向设计表，然后通过读取模板中的元素和设计表中的操作步骤信息自动地依次进行点云测量数据的自动分割、不同曲面类型的逆向重建、各重建曲面特征之间后处理等操作。在算法和理论研究的基础上开发了相关程序，实例验证表明，该方法达到了快速逆向建模的目的。

关键词: CAD/CAM, 批量结构毛坯, 点云分块, 逆向建模

Abstract:

The batched complex blanks with same structure and certain deviations in geometry often needed to be reconstructed. The repeated process wasted a lot of labors and extended the production cycle. An efficient reconstruction method was proposed based on the structural template and the reverse design table. Firstly, the feature of the blank's structure was analyzed. A template representing the structure features, as well as a reverse design table based on open knowledge representation, was established. Secondly, the elements in the template and the steps in the design table were utilized to segment the cloud points automatically. Thirdly, different types of surface were reversely reconstructed and post processed orderly. The experimental results validate the method's high efficiency.

Key words: CAD/CAM, batched complex blank, segmentation of point cloud, reverse modeling

中图分类号:

TP391

王海舟, 张丽艳, 周良明, 刘胜兰. 批量复杂结构毛坯的快速逆向建模技术研究[J]. 中国机械工程, 2014, 25(14): 1935-1940.

Wang Haizhou, Zhang Liyan, Zhou Liangming, Liu Shenglan. Rapid Reverse Modeling of Batched Complex Blanks[J]. China Mechanical Engineering, 2014, 25(14): 1935-1940.

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