The Influence of Punch Bottom Edge Profile on Side Shear Zone of Micro-blanking Parts
Micro-blanking is one of the typical micro-machining technologies,which has the advantages of high efficiency and low cost.Its mechanism is to generate the shear deformation along the contour line of die edge using the punch edge and separate micro blanked part from the whole plate.When blanking irregular cross-sectional parts,the side surface quality of blanked part is very important in its application.The influence of punch bottom edge profile on side surface quality of micro-blanking part is studied by means of numerical simulation and analysis of experimental data.Mises stress data were obtained from the simulation results.The Mises stress data were associated with the measured height of bright side surface of blanked part.Meanwhile,it provides the basis for the design of non-flat punch to improve the quality of side surface of blanked part.The non-flat bottom surface of punch is designed based on simulation analysis.A non-flat edge punch with a narrow bottom beam blade with a height of 50 μm was prepared online using a set of self-developed experimental equipment.The blanking experiment was carried out on 3J21 elastic alloy foil with a thickness of 80 μm.Experimental results indicate that the non-flat bottom profile design method proposed this paper is useful to improve the quality of side surface of blanked part.
micro blankingfinite element simulationshear zonenon-flat punch
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万方数据
