Numerical Simulation And Experimental Study Of Micro Plastic Forming

In recent years, micro forming technology has gradually become the focus of research in the field of mechanical manufacturing. Micro forming technology has been widely used with good form-ability; forming precision, low cost, high productivity advantages are inseparable Plastic micro forming technology to manufacture micro parts by plastic deformation mode, applied micro parts manufacturing, high quality and low cost. Therefore since the emergence of micro forming technology, has attracted world wide attention and research institutions. It has the very important application prospect in the field of aerospace, military, medical, electronics, textile etc.As the processing objects are small size, the scale effect, the traditional plastic forming mechanism and the material is applied directly to the micro forming law of deformation. Whether the design of micro forming die is to explore the problems in the process of forming, micro plastic forming technology is a new research field, which has very important scientific significance for the study of micro forming technology. In this paper, by using the method of numerical simulation and experimental study of the combination of research, analysis of micro plastic forming extrusion process in the basic law and internal mechanism.First of all, according to the development process of micro forming technology, and technology, size effect, micro mold, numerical simulation progress and present status of the technical aspects of the comprehensive analysis. The relevant theoretical basis of consolidation micro forming technology. Including the rigid plastic finite element theory, crystal plasticity finite element theory and the strain gradient theory, which is the theoretical basis of this article.Secondly, on the micro forming process of die design are discussed, the traditional design method of extrusion die for reference, design and manufacture of micro extrusion die has the advantages of simple operation, easy assembly and disassembly.Again, the use of mold manufacturing good, select the typical micro forward extrusion process was studied, the analysis of different height of sample size, under the condition of micro extrusion forming rules, characteristics of height and their influence on form-ability. On the basis of experiment, the pure aluminum material micro extrusion forming and using ECAP ultra fine grained pure aluminum material micro extrusion forming by micro-structure observation and analysis.Fourth, the micro plastic extrusion forming process simulation. With rigid plastic finite element theory, by using the finite element software DEFORM on the micro forward extrusion process was simulated, and the analysis of the forming of the simulation results and experimental results are compared to verify the reliability of the method, simulation. On top of this, the establishment of four different transition section designs of micro mold model, the energy consumption, liquidity, efficiency, the backlog of defects as the goal, has carried on many times the simulation analysis, to reveal the transition of micro extrusion process, and to determine the optimal plan.