Simulation of presise blanking of micro electronic parts

The magnitude of leadframe is actually the order of 10-D2-6-D2m。However， it is impossible to perform the experiment of the order of the experiment of the order of the order of 10 - 10-D2-3-D2m Has been performed。The difference Between the conventional blanking and the blanking of leadframe lies in the ratio of the width of the blank t the thickness of the blank。在传统的空白中，自从空白的宽度比空白的厚度大，空白的形状也是一条条纹。在另一只手里，在一个空白的框架里，自从空白的宽度就像空白的厚度一样大，空白的形状就可以重建一个酒吧。《拳击手和死神》是根据不同的考虑设计的。首先，拳头的宽度为10毫米，而两个洞之间的距离为6.0毫米、6.4毫米、6.8毫米、7.2毫米、8.0毫米、8.4毫米、8.8毫米、9.2毫米和9.6毫米。空白的厚度可分为6毫米、8毫米、10毫米和12毫米。He（He） ... More nce，从0到0的空白变化的厚度的比率。5至2。下一步，空白实验使用铜、铝（H）和铝（O）进行了性能。According to the experiment， the deformation of the material is characterized in the use of the die of 6. 8 mm and the die of 6. 8 mm。Hence，两种物质在使用中的变形是通过网格方法的应变分析来确定的。第一，在使用8.8毫米的模具时，材料的变形在该区域内被确认为材料的变形在该区域内被确认为没有被确认为冲压清除区域。在另一只手上，用6.8毫米的死神来做空白，材料的变形就不被认为在冲头清除的区域内。下一个是，该分析of the blanking of the leadframe的分析在the assumption of the assumption of the blanking of the assumption of the blanking the computer program中使用的计算机程序已经由the authors for the blanking的分析进行了执行。作为一个结果，从使用传统的二块碎片标准的材料对材料的修改到一个阶段的出现的两块碎片使用的传统二块碎片标准比实验获得的材料的修改要大得多，而使用我们提议的二块碎片标准对材料的修改要大得多。汉斯，我们提出的导电性准则的有效性已经得到确认。Less（低）

The magnitude of leadframe is actually the order of 10ィイD2-6ィエD2m. However, it is impossible to perform the experiment of the order of 10ィイD2-6ィエD2m.Hence, the experiment of the order of 10ィイD2-3ィエD2m Has been performed. The difference between the conventional blanking and the blanking of leadframe lies in the ratio of the width of the blank t the thickness of the blank. In the conventional blanking, since the width of the blank is much larger than the thickness of the blank, the shape of the blank resembles a strip. On the other hand, in the blanking of leadframe, since the width of the blank is as large as the thickness of the blank, the shape of the blank resembles a bar. The punch and the die are designed in the consideration of the difference. First, the width of the punch is set to be 10mm and the distance between two holes of the die is set to be 6.0mm, 6.4mm, 6.8mm, 7.2mm, 8.0mm, 8.4mm, 8.8mm, 9.2mm, and 9.6mm. The thickness of the blank is set to be 6mm, 8mm, 10mm and 12mm. He … More nce, the ratio of the width of the blank to the thickness of the blank changes from 0..5 to 2. Next, the experiment of blanking is performed using copper, aluminum(H) and aluminum(O). According to the experiment, the deformation of the material is characterized in the use of the die of 6.8mm and the die of 8.8mm. Hence, the deformation of the material in the use of the two dies is clarified by the strain analysis of the grid method. First, in the blanking using the die of 8.8mm, the deformation of the material is confined in the zone of the deformation of the material is no confined in zone of the punch-die clearance. On the other hand, in the blanking using the die of 6.8mm, the deformation of the material is not confined in the zone of the punch-die clearance. Next, the analysis of the blanking of the leadframe is performed under the assumption of various ductile fracture criterion using the computer program which has been developed by the authors for the analysis of blanking. As a result, the deformation of the material from the stage of the appearance of a crack to the stage of the meeting of two cracks using the conventional ductile fracture criterion is much larger than the deformation of the material obtained by the experiment, while the deformation of the material using our proposed ductile fracture criterion is as large as the deformation of the material obtained by the experiment. Hence, the validity of our proposed ductile fracture criterion has been confirmed. Less