The Development Of The Digitization Prototyping Of The Entire Cross Section Mechanical Boring Machine

The traditional products design and development procedure generally contains sketch design, drawing design, physical prototype manufacture and prototype experiment. This procedure takes time long and costs highly, which can not meet the integrative needs of quality, efficiency and cost. But the digitization prototype technology is a kind of completely new one, whose emergence and development brings an innovation to the traditional way of products design. By applying this technology, engineers can make various simulation and analysis on the built virtual digital model of the product, which could help them to find out the potential problems and mistakes of the product in the design period, and then they can amend the mistakes and improve the design sketch quickly. Therefore, applying digitization prototyping technology in the process of product design could reduce its dependence on the physical one, which could reduce the development cost, cut the development cycle, improve the design quality and product performance and increase the competition capability of the enterprise.The entire cross section mechanical boring machine, also called the shield machine, is a special engineering machinery for shield engineering construction. According to different geological conditions, we choose the adaptive shield machine, which can tunneling in the earth accurately by the computer, and meanwhile assembling the segments which can under great pressure in the rear shield, to construct a high quality of the tunnel. Because of the high degree of mechanization, the fast construction speed, the quality security, the extensive applicability, the little impact to the grand, benefit to the environment, the shield machine has been used in the underground, highway, railway, gas water services hydropower tunnel, and so on large-scale projects.The shield machine is a mechanical and electrical product with complicated structure and high automation, its design has the rigorous requirements on kinematics capability, dynamic capability and mechanical structural capability. To assure the design quality of the shield machine, cutting the design time and reduce the design cost effectively, digitization prototyping technology should be introduced into the whole design procedure of this product. The paper studied the Earth Pressure BalanceΦ6.28m shield machine, built its 3D digital model. On the basis of this model it also built the motion simulation model, finite element model, which could be used to evaluate kinematics and dynamic capability, structure capability roundly after completing the simulation analysis. It also provided the design with quality assurance and the milling machine improvement with reliable warrant.By applying digitization prototyping technology, this paper realized the modeling and simulation of the shield machine. This method is not only suitable for the design and development of shield machine, but also for the other full face boring machine. And it also can be extended to research, design and develop other mechanical system with complicated structure. So the research method and the consequence in this paper have the significant practical value.