Research & Implementation On Virtual Layout & Simulation For Bending Pipe Machine

Technique of bending pipe is widely used in the manufacture of automobile and ship, but facility layout of bending pipe machine is one of pivotal factors for production of bending pipe. Commonly, workers simulate layout with actual facility in workshop, result in material resources, manpower and time are largely waste. Therefore, the research for layout, interference checking and simulation for bending pipe machine is proposed.An integrated system framework is established by analyzing the process of layout and virtual simulation for bending pipe machine and logical model of system. Moreover, geometry model of facility are established based on analyzing the assembly hierarchy and location of facility.Characteristics of interference checking based on oct-tree and the inefficient limitation for checking complex assembly entity are analyzed. According to that facility of bending pipe machine has characteristics of hierarchical assembly, a 3D layout interference checking algorithm based on hierarchical bounding box is constructed by combining qualitative interference checking based on bounding box with quantitative interference checking based on entity geometry intersection, an efficient interference checking for bending pipe machine is achieved.Common 3D layout algorithms do not decompose layout problems and consider adequately the directive function of engineering-oriented constraint rules to the resolution of layout problems. In order to avoid the limitation, a hierarchical advancement layout algorithm based on engineering-oriented constraint rule is proposed according to that the layout for bending pipe machine has the characteristic of hierarchical constraint and includes some significant rules and expert experience, initial automatic layout is achieved. Moreover, the operations of interactive layout are provided.On the base of former research, the class hierarchy and data structure of facility geometry model is provided. In addition, Simulation strategy, timer mechanism, simulation algorithm and their data structure of layout and virtual simulation for bending pipe machine are constructed. A layout and virtual simulation system for bending pipe machine is developed with VC++ 6.0 and OpenGL. Moreover, an application example is presented...