摘要
飞机长桁类零件工艺板坯数模的精确展开设计对于提高加工效率、降低加工成本、节省原材料以及改善零件成形性能具有重要的工程意义。基于长桁类零件的结构特点和成形工艺,提出一种零件设计数模向工艺板坯数模的展开转换方法。通过建立局部笛卡尔坐标系,逐步对长桁的基础特征和局部特征进行展开转换,最终将零件设计数模展开为适用于三坐标数控加工的工艺板坯数模。同时,通过在展开转换过程中对零件成形过程中产生的延展变形进行前置补偿,有效避免了零件的超差或报废。
Precise process rough spreadmodeling for the aircraft stringer structure can significantly enhance the machining efficiency, reduce the cost, save the material and improve the part performance. A new process rough spread-modeling method for the aircraft stringer structure is proposed based on the part feature and machining process. By establishing the local Cartesian reference frame, and then gradually transiting the basic feature and the local feature, the designed stringer structure model is finally transformed into process rough model which adapts to the three coordinate NC machining. On the other side, the method allows to compensate the prolongation induced during bending forming in advance. As a result, the overerror and disuse can be avoided.
出处
《航空制造技术》
2015年第15期33-35,共3页
Aeronautical Manufacturing Technology
关键词
长桁类零件
展开设计
工艺板坯
补偿
Stringer structure Spread-modeling Process rough Compensate
