Single-Point Incremental Micro-Forming of Thin Shell Products Utilizing High Formability
Single-Point Incremental Micro-Forming of Thin Shell Products Utilizing High Formability
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DOI：
10.1299/jamdsm.4.1145
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发表时间：
2010-01-01
影响因子：
0.9
通讯作者：
Yoshino, Masahiko
中科院分区：
文献类型：
--
作者：
Obikawa, Toshiyuki;Hakutani, Tomomi;Yoshino, Masahiko
本文介绍了50 ~ 1000 μ m微型壳体产品的单点渐进微成形。首先，优化了具有1 mm正方形基底的金字塔的微成形条件，以使坯料的延伸率高达128%，从而得到具有64度仰角的高金字塔。其次，研究了在形成具有50 μ m正方形基底的棱锥时，工具旋转速度对成形极限的影响。结果发现，最佳转速随着金字塔的尺寸而减小。最后，形成尺寸为100 μ m至500 μ m的字母和数字作为自由形式产品。根据结果讨论了晶粒尺寸对微型壳体制品的影响，得出结论：只要晶粒尺寸与产品尺寸相比不是很小，尺寸小于100 μ m的微型制品的微成形工艺必须考虑晶粒尺寸的影响。
This paper describes single-point incremental micro-forming of miniature shell products 50 mu m to 1000 mu m in size. First, the conditions of the micro-forming of a pyramid with a 1 mm square base were optimized to cause large elongation of a blank up to 128%, resulting in a tall pyramid with an elevation angle of 64 degrees. Next, the influence of the tool rotational speed on the forming limit in forming a pyramid with a 50 mu m square base was investigated. It was found that the optimum rotational speed decrease with the size of a pyramid. Finally, letters and numbers 100 mu m to 500 mu m in size were formed as free form products. The effect of grain size on the miniature shell products was discussed based on the results and it was concluded that the effect must be taken into consideration in micro-forming processes of miniature products smaller than 100 mu m in size as far as the grain size is not very small as compared with the size of a product.