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Simulation of presise blanking of micro electronic parts

微型电子零件精密冲裁仿真

基本信息

批准号：
10650101
负责人：
KOMORI Kazutake
金额：
$ 0.83万
依托单位：
Daido Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650101/
关键词：
blanking leadframe ductile fracture finite-element method grid method

项目摘要

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

引线框的大小实际上是10 μ m D2-6 μ m D2 m的数量级。然而，不可能进行10 μ m D2-6 μ m D2 m量级的实验。因此，进行了10 μ m D2-3 μ m D2 m量级的实验。引线框冲裁与常规冲裁的区别在于毛坯的宽度与厚度的比值。在传统的冲裁中，由于坯料的宽度远大于坯料的厚度，因此坯料的形状类似于条带。另一方面，在引线框的冲裁中，由于坯料的宽度与坯料的厚度一样大，因此坯料的形状类似于棒。在凸模和凹模设计中考虑了这一差异。首先，冲头的宽度设定为10 mm，模具的两个孔之间的距离设定为6.0mm、6.4mm、6.8mm、7.2mm、8.0mm、8.4mm、8.8mm、9.2mm和9.6mm。坯料的厚度设定为6 mm、8 mm、10 mm和12 mm。他 ...更多信息此时，坯料的宽度与坯料的厚度的比率从0.五比二接下来，使用铜、铝（H）和铝（O）进行冲裁实验。根据实验结果，在使用6.8mm和8.8mm的模具时，材料的变形是特征性的。因此，在使用的两个模具的材料的变形是明确的网格法的应变分析。首先，在8.8mm的冲模冲裁中，材料的变形被限制在材料变形区，而不是被限制在冲裁模间隙区。而在6.8mm凹模冲裁时，材料的变形并不局限于凹模间隙区。其次，利用作者开发的冲裁分析程序，在各种韧性断裂准则的假设下，对引线框冲裁进行了分析。结果表明，采用常规韧性断裂准则的材料从裂纹出现阶段到两条裂纹相遇阶段的变形量远大于实验得到的材料变形量，而采用本文提出的韧性断裂准则的材料变形量与实验得到的材料变形量一样大。因此，我们提出的韧性断裂准则的有效性已得到证实。少