| 講演抄録/キーワード |
| 講演名 |
2019-10-18 13:05
Al/Cu薄板の衝突部へ放電電流を転流する電磁圧接法(第2報) ○相沢友勝(都立高専) EMD2019-36 |
| 抄録 |
(和) |
この電磁圧接はコンデンサ電源から絶縁した平板状5ターンコイルへ減衰振動する放電電流を瞬間的に流して行われる.間隙を設けて重ねたAl/Cu薄板をコイル上に固定し,各薄板をコイル両端へそれぞれ接続する.コイルへ放電電流を流して高密度磁束を急激に発生し,コイルに近いAl薄板に加える.Al薄板には渦電流(誘導電流)が流れて電磁力が働く.Al薄板はCu薄板へ高速で衝突して圧接される.両薄板が衝突するとき,放電電流は最大値に達するようにする.このとき,両薄板は機械式スイッチの接点用薄板としても働く.接点用両薄板が閉じると,放電電流は両薄板の衝突部を含む短絡回路へ転流する.転流後,コイルへ流れる電流は,振動しなくなり,放電装置への悪影響が弱まる.前報告では,Al/Cu薄板は従来どおり圧接された.しかし,接点用Al/Cu薄板が一組だけで,薄板間に加わる放電電圧が高く,絶縁に必要な間隙が大きかった.これを改善するため,接点用薄板を二組以上を直列に使用する方法を検討したので報告する. |
| (英) |
In this report, magnetic pulse welding is performed by rapidly flowing a damped-oscillating discharge current from a capacitor bank to an insulated 5-turn flat coil. Overlapped Al/Cu sheets with a gap are fixed on the coil, and each sheet is connected to both ends of the coil. When the discharge current is flowed through the coil, a high density magnetic flux is generated and applied to the Al sheet near the coil. The resulting eddy currents flow in the Al sheet and electromagnetic forces act to the sheet. The Al sheet collides with the Cu sheet at high speed, and both sheets will be welded. The current is set to be nearly peak when the sheets collide. Both sheets also act as high-speed mechanical switch contacts and so the current flowing through the coil commutates to the short-circuit including the collision part of sheets. After the commutation, the coil current does not oscillate, which is good for the discharge device. In the previous report, both sheets were welded conventionally. However, only one pair of Al/Cu sheets was used for contacts, the discharge voltage applied between the sheets was high and the gap required for insulation was large. In order to improve this, we report how to use two or more pairs of Al/Cu sheets in series for the contacts. |
| キーワード |
(和) |
電磁圧接 / 機械式スイッチ / Al薄板 / Cu薄板 / コンデンサ電源 / 放電電流 / 転流 / |
| (英) |
Magnetic pulse welding / Mechanical switch / Al sheet / Cu sheet / Capacitor bank / Discharge current / Commutation / |
| 文献情報 |
信学技報, vol. 119, no. 234, EMD2019-36, pp. 1-6, 2019年10月. |
| 資料番号 |
EMD2019-36 |
| 発行日 |
2019-10-11 (EMD) |
| ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
| PDFダウンロード |
EMD2019-36 |