摘要
为充分利用前人的成功工艺经验,提出了一种基于焊装工艺相似的白车身零件实例检索的方法。考虑零件的主特征、辅助特征及特征之间的约束关系,建立了零件特征信息模型。从焊装工艺相似的角度,分3个阶段计算了零件间的相似度。第一阶段计算零件间主、辅特征的形状相似度和关系相似度,过滤掉形状不相似的零件;第二阶段计算零件间的几何尺寸的相似度,再次过滤掉尺寸相差较大的零件;第三阶段计算零件间的材料种类和材料厚度的相似度,获得工艺最相似的零件。通过具体的实例验证了该方法的有效性。
To make full use of previous successful process experience,a case retrieval methodology for body-in-white parts was proposed,which was based on the similarities of welding and assembly process.Firstly,by considering the primary features,the secondary features and the feature constraint relationships,a feature information model for parts was established.Secondly,from the view of the process similarity,the similarity was calculated by three stages analysis between a new part and old part in the case library.In the first stage,both the shape and the relationship similarities of the primary features and secondary features of the new case and old ones were calculated respectively.Many old cases with little similarity in shape were removed.In the second stage,the geometric similarities were calculated.The old cases with more difference in size were removed.In the third stage,similarities of the material type and the material thickness were calculated.The most similar case was retrieved.Finally,a case study indicated the effectiveness of this method.
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2011年第1期30-36,共7页
Computer Integrated Manufacturing Systems
基金
国家863计划资助项目(2008AA04Z105)~~
关键词
焊装工艺
相似度
实例检索
白车身零件
工艺规划
welding and assembly process
similarity
case retrieval
body-in-white part
process planning
