CAJ | 학술논문

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。
공정실천중상상수요대결구상상동、궤하상피차유일정편차적비량복잡결구모배축건진행CAD모형역향중건，저양중복적조작회낭비대량적인력，제약생산주기。침대차류문제，제출료일충기우결구특정모판화역향설계표적쾌속역향건모방법。해방법수선근거모배결구적특점제정결구특정모판、창건기우개방식지식표시적역향설계표，연후통과독취모판중적원소화설계표중적조작보취신식자동지의차진행점운측량수거적자동분할、불동곡면류형적역향중건、각중건곡면특정지간후처리등조작。재산법화이론연구적기출상개발료상관정서，실례험증표명，해방법체도료쾌속역향건모적목적。
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 produc-tion 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 reconstruc-ted and post processed orderly .The experimental results validate the method’s high efficiency .