Research On A Method Of Material-objected Modeling Based On Dieless Single Point Forming Technology

The three-dimensional curve surface sheet forming is a hot problem studied at home and abroad for a long time, whorl-pressure forming, thumping forming, multiple point forming and numerical control single point forming and so on. These forming methods are all geared to the needs of the handicraft means manufacture. But with the rapid prototyping technology appearing, the model design has provided one kind of brand-new design procedures to machinery of industry design. Owing to such one kind of idea, the subject has exactly been a good design method having suggested, which based on the dyadic maser-slaver isomerism 10 system and the technology of single point incremental forming.The computer controls the single point forming implement by program on a simple tool, with the trajectory it carry out continuous plasticity forming operation, and it applied broadly to plate metals forming. This method turns to Relate to the plasticity engineering, the numerical control technology and the computer technology. the thought "to Descend a dimensional "are adopted to the treating a physics entity fabrication carrying out tier from able complicated three-dimensional straggling forming to forming in a simple two-dimensional plane.The main body of this subject is emphasized to discuss the influencing factor to the shape quality with which numerical single point incremental forming handicraft. Having summed up the current situation studying about the single point incremental forming home and abroad, Mechanism has carried out analysis on the single point incremental forming and built mathematic model of forming process, and have discussed forming trajectory design philosophy, the author have realized the die model single point forming process in its real meaning.This paper is mostly discussed dieless single point forming process and its mechanics, it adopt the Dynamics finite element method with LS—DYNA software to carry out the numerical simulation research aimed at the single point forming process. In this paper, the author have studied an impact of technological parameter over the single point incremental forming, implement the ball radius of the tool, perpendicularity feed amounts, feed speed level and friction condition. The experiment has assumed large amount of preparation job to carrying out the single point incremental forming process, analyzed the forming function based on numerical simulating result being take, discussed forming process cause and restraint method that the defect produces such as being hit by drawing breakage, being corrugating, having analyzed the different including board material "the layer" of deformation characteristics area single point incremental forming change a trend of strain history and thickness. The result of the study indicates that the simulation carries out on the single point incremental forming with finite element method, can provide the important basis through forming technological parameter ascertaining that and the judgment to forming function of the single point incremental forming.The final section has probed the mainly owing to that dyadic isomerism of master-slaver 10 and the system of the technology about curved surface model forming and editing, including the space coordinate mapping and curved surface geometry definition, in this paper, the author has brought forward one kind of new method to shell curved surface model.