Abstract
Research and application of rapid assembly technology can widely improve the design efficiency of helicopter transmissions. An assembly model of helicopter transmissions is presented by introducing Geometric Constraint Graph (GCG) method. A hierarchical model is obtained by multi-shrink decomposition. A corresponding data structure is generated according to the hierarchical model. CATIA based a parametric component database is built up. The Assembly modelling software is implemented by using VB. Finally, a helicopter transmissions example is taken as application and the rapid assembly for helicopter transmission system is achieved.
Highlights
Modern helicopter has developed into a high performance aircraft with heavy load, low weight, low noise, new technology, new materials, new equipment and advanced electronic equipment
The purpose of configuration research is to develop a new type of gear transmission system, transmission system layout and its rapid assembly design [2,3]
In this paper, aiming at the problem of rapid assembly of helicopter transmissions system with complex spatial relations, a transmissions assembly model based on geometric constraint diagram was proposed, and a layered data structure including assembly constraint relation and assembly model was constructed, the assembly modeling of helicopter transmissions system was developed based on CATIA
Summary
Modern helicopter has developed into a high performance aircraft with heavy load, low weight, low noise, new technology, new materials, new equipment and advanced electronic equipment. Configuration design is a design method based on the arrangement and combination of predefined components and parts. The rapid assembly of the helicopter transmission system is conducive to the rapid verification of the transmission system configuration, the analysis of its spatial structure and interference status, and the improvement of the design efficiency of the helicopter transmission system configuration. Abe [5] designed and developed a set of visual system for the assembly problem of mechanical parts, in the virtual environment, it supported designers to conduct assembly analysis and performance evaluation, new employees can systematic operation training when assembling machines, which greatly improves the efficiency. On the basis of identifying and understanding the designer’s assembly intention and operation, the assembly constraint diagram of tree structure was established based on the assembly relationship, and the positioning and navigation of assembly in the virtual environment was realized through the analysis of spatial geometry. In this paper, aiming at the problem of rapid assembly of helicopter transmissions system with complex spatial relations, a transmissions assembly model based on geometric constraint diagram was proposed, and a layered data structure including assembly constraint relation and assembly model was constructed, the assembly modeling of helicopter transmissions system was developed based on CATIA
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