Research On Forming Quality Of Numrical-controlled Selective Electrodeposion Rapid Prototyping

Rapid prototyping & manufacturing technology are widely used in many fields owning to its advantages of rapidly and freely forming any three dimensional solid by the way of additional and digitizing-drived shaping method. At the moment, forming metal function part directly using metal material is the entire world's development directionall of rapid prototyping & manufacturing technology.Electrochemical deposition technology is a precise and material-increased technology, which forms a part by the way of the metal ions deposited in the cathode surface. Its great strength is the ablity of getting a part with high precision and finish, precisely copying complex surface and slight trace. But it also has shortages such as the low deposition speed, the poor homogeneity of settled layer and depending heavily on master pattern. Therefore, its application is restricted to the area of precision and micro machining.Combining rapid prototyping & manufacturing technology, electrochemical deposition technology and numerical control technology, and taking advantage of their superiorities, a new technology of direct metal forming——Numerical-controlled Selective Electrodeposition Rapid Prototyping was proposed in this paper. This technology can be used to the direct metal forming and manufacture metal part by the methods of electrochemical deposition, greatly expanding the research field of tradional rapid prototyping. Through the theoretical analysis and technological test study of numerical-controlled selective electrodeposition rapid prototyping, the main research contents of this paper includes:(1) By analyzing the rationality of the integration of rapid prototyping & manufacturing, electrodeposition technology and numerical control technology, the numerical-controlled selective electrodeposition rapid prototyping was proposed, providing a new way to the direct rapid forming of metal part.(2) The technological feature of numerical-controlled selective electrodeposition rapid prototyping was analysed. And the machine tool system of numerical-controlled selective electrodeposition rapid prototyping was developed. The hardware structure was put up as well as the control software was developed.(3) Analyzing the data interface of numerical-controlled selective electrodeposition rapid prototyping, namely, the STL document, which was used in the data processing. Its repair methods of main defect was introduced, laying foundations for the development of software of lamination slicing and the achievement of scanning path. (4) The electrodeposition mechanism of numerical-controlled selective electrodeposition rapid prototyping was studied. And starting with the anodematerial, end face geometry and electrodeposition model, the core structural part——anode head was prepared.(5) The path planning method of numerical-controlled selective electrodeposition rapid prototyping was put forward. Based on the common scanning path of rapid prototyping, the parallel straight line crisscross clearance reciprocating scanning path was raised. The realization algorithm of scanning path was detailed introduced. Integrating the experiment, a metal copper part with regular shape and distinct outline was prepared.(6) The main factors of forming quality was analysed, mainly including STL model parameter and technological parameter. The influences caused by the technological parameter to localization was detailed analysed. A set optimized technological parameter was finally received. And the methods of improving the electrodeposition velocity was disused, the optimized approach of layering algorithm was also introduced.