Consider The Virtual Assembly Tool Assembly Support System Research And Implementation

For a long time, the backward way to assembly planning has been one of the main bottleneck preventing the development of manufacture automation. Virtual assembly, as the main part of virtual manufacturing, is regarded as technological innovation for traditional assembly design and is likely to solve the ever-lasting problem of assembly automation. Based on analysis of present situation and existent problem of virtual assembly, this paper dwells on the key technology of virtual assembly such as assembly information modeling, model reconstruction, assembly tool modeling and assembly process planning with assembly tool. The issues involved in this research are as follows:1. An multi-view and layered assembly information model is established, on the base of which the layered tree and the constraint base are developed. They can provide enough information for the next steps such as assembly process planning and process simulation.2. In order to solve the problem of product assembly body's layered structure inconsistent with assembly process, location-pose-matrix is used as the base of model reconstruction and the problem is well worked out.3. In order to implement the automatic selection and location of assembly tool, assembly feature is put forward and adopted to build the assembly tool geometric information model. In addition, based on the analysis of assembly tool's function characteristics, 11-tuple representation is used to describe the movement of the tool. Assembly tool's behavior model is built.4. Based on the analysis of assembly tool's effect on the assembly process planning, assembly step and assembly step link is given and used to describe the assembly procedure. In addition, the process of assembly tool is divided into entry, operation and quit. Some tool's automatic operation is implemented.5. The architecture of virtual assembly support system with assembly tool isgiven, and the functional module and implementation of the system aredescribed in detail. Finally an application is given to explain the usage of system and proves the above-mentioned achievement.