Abstract:

To ensure the assembly accuracy of the wing-like parts, a new positioning method was studied based on coordinating holes at the internal location assembly pattern. By comparing the traditional positioning method based on the profile of the card  board, due to the superiority of the coordinating holes at the coordinating process of the wing-like parts according to the  coordination routine of the shape and the dimensions of the aircraft parts, a new flexible coordinate method of the ribs was proposed. The locater unit was designed to meet all of  the ribs of a certain aircraft by checking the locating process under  the DELMIA environment. By analyzing the coordinate principles and calculating the coordinating errors of the skin, the  theoretical results show that the assembly accuracy is improved. Flexible assembly examples show that the flexible  positioning unit has a simple structure and correspending low cost. The experimental measured results also reveal the new flexible coordinating method can fully satisfy the assembly precision of the skin.

Key words: rib positioning, flexible assembly, coordinating datum, assembly accuracy, coordinate hole, coordinate error

摘要：

为保证翼面类部件外形的装配准确度,研究了以坐标定位孔为协调定位基准的内定位装配方式对装配准确度的影响。对比分析传统翼肋产品的外形定位方式的协调方法,根据以坐标定位孔为协调定位基准协调外形轮廓过程中的优势,提出了一种翼肋柔性装配方法，设计了翼肋定位执行末端，在虚拟环境下进行了柔性定位仿真验证。结合飞机数字化制造流程，分析其装配协调过程，计算以坐标孔为协调基准的外形尺寸误差。某型飞机前缘襟翼的柔性装配实例表明：柔性定位单元结构简单，成本较低，翼肋柔性装配准确度完全满足外形精度设计要求。

关键词: 翼肋定位, 柔性装配, 协调基准, 装配准确度, 坐标定位孔, 协调误差