Research And Implementation Of Rapid Design Technology For Aircraft Assembly Fixtures

Aircraft assembly fixture design is an important tool in aircraft assembly. It is of great significance to study the rapid design technology for improving the design efficiency and guaranteeing the quality of aircraft jig. In this paper, the rapid design technology of aircraft jig frame, board and the parametric design technique of mounts are studied by the combination of the production demand of aviation enterprise. The main content of this paper is as follows:1) Rapid construction of aircraft jig frame. The jig frame is abstracted as wireframe through analysis its construction. The product’s axis-aligned bounding box coordinate system is determined by the minimum area bounding rectangle of the product’s projection in reference plane of the designed assembly fixture. Basing on the bonding box, the aircraft jig frame’s initial wireframe is generated. And the editing tools are designed to assistant create the aircraft wireframe through studied the common wire frame editing operation. The wireframe is swept by the section of formed steel. And the intersecting part of steel is manipulated in order to get the aircraft jig frame.2) The rapid design of the board. According to the enterprise requirement of the board’s design, the experience of board design is summarized. And rapid adjustment of board shape and real-time preview technology is studied. The rapid design of the board is implemented by encapsulating these boards design knowledge in the form of flow guide.3) Parametric design of mounts. In order to analyze the parametric design method, the frequently used mounts are concluded and mounts model library is built. Based on the research of multiple classifications of mounts, the expression of the type of mount is put forward. In addition, the quick positioning technology of the mounts is studied, and the mounts can be put into initial position of the assembly frame.Based on the above study, aircraft jig frame, board rapid design modules and mounts parameters design module are developed in CATIA, and primary applied in tooling equipment design in enterprises.