| With the rapid development of computer technology, technology of computer aided design is further developed in the field of mechanical design. Scope of application of computer-aided design is developed from the two-dimensional to three-dimensional, from linear to nonlinear, from static to dynamic, from the components to the machine. At present, UniGraphics (UG) has played an important role in the mechanical design,and has been making mechanical design to a new level. Application of UG technology is greatly improved the mechanical design automation level and functionality, promoted the innovation development of the design and mechanical engineering, improved the social and economic benefits. The paper mainly discussed how to use the UG software to creat three-dimensional modeling for the machine of retrieving the used plastic film in tobacco field, then on this basis,the virtual assembly of its components was completed,and how to use UG movement analysis module to complete the motion analysis of plastic film retrieving machine.1)Using visual information functions of the powerful model for structural design in UG system was drawed parts diagram of plastic film retrieving machine, and creats three-dimensional model.2)By regulating the range of motion or improving organization parameters virtual prototype could meet the performance and functional design requirements. According to functional requirements, the simulation and analysis of design was carried on in order to obtain the optimal design.3)Implementing agencies and sports programs was selected by divergent design, and the virtual assembly and motion simulation was carried on. Thereby, the level of mechanical product development was increased and the product design cycle is shortened. 4)Chain-type plastic film retrieving machine han been in trial.The machine mainly composed by the wheel, the guide for rising film, the spring-finger, the sprocket for rising film, agencies for unloading and box for film collection and so on. The trial proved that the machine was applicable to the spacing from 900 to 1200 mm, the high ridge from 200 to 250 mm, operating speed of 1.5 km/h, the rate of plastic film recovery of 91.2%. |
