| Project/Area Number |
21560127
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Production engineering/Processing studies
|
|---|
| Research Institution | Kyushu Institute of Technology |
|---|
Principal Investigator |
HIROTA Kenji 九州工業大学, 大学院・工学研究院, 准教授 (50273256)
|
|---|
| Project Period (FY) |
2009 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
|
|---|
| Keywords | 微細穴 / プレス加工 / 塑性加工 / エッチング / 加工精度 / バリ |
|---|
| Research Abstract |
A new micro piercing process was developed ; after a deep indentation is formed on a sheet metal, the other side of the sheet is removed uniformly by chemical etching until the dissolution reaches the tip of indentation. In this study, multi-holes were pierced by the process and the influence of the hole-pitch on the accuracy of the adjacent holes was investigated. Experi-ments were carried out for a 0. 1mm thick copper alloy sheet. By using conical and V-shaped in-denters, circular and rectangular holes having tens of micrometers in size were successfully pro-duced, respectively. The error of thickness reduction by etching was more influential on the dimen-sional accuracy of the hole than that of the indenting depth. The hole shape was distorted when the pitch between holes was below a specific threshold. The threshold pitch for rectangular holes was considerably larger than that for circular holes, which was explained by the metal flow during in-denting.
|
