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随着微机电系统的飞速发展,微孔类零件广泛应用于生物医疗、微电子以及纺织印染等领域中,要求尺寸精度高、断面质量和重复性好,并且能够实现低成本批量制造.微冲孔技术具有传统塑性加工工艺的优点,生产效率高,工艺简单,成形件性能好和精度高,非常适合微型零件的低成本批量制造.针对箔板微孔类零件,设计了一套精密微冲孔模具,采用微冲孔技术研究了冲裁条件对微冲孔工艺的影响规律.结果表明,微冲孔过程与传统冲裁类似,经由弹性变形阶段和塑性剪切阶段,最后断裂分离.微孔断面分布仍然包括圆角、光亮带、断裂带和毛刺.随着相对冲裁间隙的增加,最大剪切强度先降低后逐渐增加;随着冲裁速度的增加,铜箔微冲孔过程最大冲裁力和最大剪切强度逐渐减小,微孔断面光亮带高度增加,断面质量提高.最后,在最佳的冲孔工艺即冲裁间隙为5%、冲裁速度为20mm/s的条件下冲出直径为0.4mm质量良好的微孔.
With the rapid development of MEMS, microporous components are widely used in biomedical, microelectronics and textile printing and dyeing fields, which require high dimensional accuracy, good section quality and repeatability, and can be mass-produced at low cost. Hole technology has the advantages of traditional plastic processing technology, high production efficiency, simple process, forming parts with good performance and high precision, very suitable for low-cost mass production of miniature parts.For the foil micro-hole parts, designed a set of precision micro-red The results show that the micro-punching process is similar to the traditional punching process, and finally breaks through the elastic deformation stage and the plastic shear stage.Micro-punching technology is used to study the influence of punching conditions on micro-punching process. The hole profile distribution still includes fillet, bright belt, fault zone and burr.With the relative blanking clearance increasing, the maximum shear strength first decreases and then increases gradually. With the increase of blanking speed, the micro-punching process of copper foil is the largest The punching force and the maximum shear strength decrease gradually, the bright zone height of the micro-hole section increases and the cross-section quality improves.Finally, the optimal punching process is blanking clearance of 5%, blanking speed Out under conditions of a diameter of 20mm / s for good quality microporous 0.4mm.