Research on the Micro Sheet Stamping Process Using Plasticine as Soft Punch

Plasticine is widely used in the analysis of metal forming processes, due to its excellent material flow ability. In this study, plasticine is used as the soft punch to fabricate array micro-channels on metal sheet in the micro sheet stamping process. This is because plasticine can produce a large material flow after being subjected to force and through the material flow, the plasticine can cause the sheet to fill into the micro-channels of the rigid die, leading to the generation of micro-channels in the sheet. The distribution of array micro-channels was investigated as well as the influence of load forces on the sheet deformations. It was found that the depth of micro-channels increases as the load force increases. When the load force reaches a certain level, a crack can be observed. The micro sheet stamping process was also investigated by the method of numerical simulation. The obtained experimental and numerical results for the stamping process showed that they were in good agreement. Additionally, from the simulation results, it can be seen that the corner region of the micro-channel-shape work piece has a risk to crack due to the existence of maximum von Mises stress and significant thinning.

[1]  Brian J. Briscoe,et al.  Physical and numerical modelling of ram extrusion of paste materials: conical die entry case , 2000 .

[2]  Hasan Sofuoglu,et al.  Three-dimensional analysis of extrusion process utilizing the physical modeling technique , 1993 .

[3]  Fpt Frank Baaijens,et al.  Size effects in the processing of thin metal sheets , 2001 .

[4]  F. Vollertsen,et al.  State of the art in micro forming and investigations into micro deep drawing , 2004 .

[5]  Hasan Sofuoglu,et al.  Flow behavior of Plasticine used in physical modeling of metal forming processes , 2000 .

[6]  J. Ni,et al.  Size effects in thin sheet metal forming and its elastic–plastic constitutive model , 2007 .

[7]  G. Sala.  A numerical and experimental approach to optimise sheet stamping technologies: part II — aluminium alloys rubber-forming , 2001 .

[8]  F. Vollertsen,et al.  Laser induced shock waves in deformation processing , 2006 .

[9]  Xu Shuqin,et al.  FEM analysis and experimental research on complex forming , 1997 .

[10]  J. Ni,et al.  Investigation of micro/meso sheet soft punch stamping process - simulation and experiments , 2009 .

[11]  Hasan Sofuoglu,et al.  A technical note on the role of process parameters in predicting flow behavior of plasticine using design of experiment , 2006 .

[12]  Hasan Sofuoglu,et al.  Physical and numerical analysis of three dimensional extrusion process , 2004 .

[13]  S. Thiruvarudchelvan,et al.  The potential role of flexible tools in metal forming , 2002 .

[14]  David J. Browne,et al.  Optimisation of aluminium sheet forming using a flexible die , 1995 .

[15]  M. Fu,et al.  Experimental and simulation based study on micro-scaled sheet metal deformation behavior in microembossing process , 2012 .

[16]  Brian J. Briscoe,et al.  A finite element analysis of the squeeze flow of an elasto-viscoplastic paste material , 1997 .

[17]  S. K. Maiti,et al.  Sensitivity analysis of a deep drawing process for miniaturized products , 2004 .

[18]  M. Husnu Dirikolu,et al.  Computer aided modelling of flexible forming process , 2004 .

[19]  J. Michel,et al.  Size effects on the constitutive behaviour for brass in sheet metal forming , 2003 .