Mathematical Modeling of the Electroforming Process Utilizing Lorentz Force under Low Magnetic Induction for Dies with High Aspect Ratio

在低磁感下運用洛侖茲力製作高深寬比模具之數學模式

陳鐵元(Tee-Yuan Chen) ； 汪島軍(Dau-Chung Wang)

《中國機械工程學刊》 28卷5期 (2007/10) Pp. 495-502

https://doi.org/10.29979/JCSME.200710.0004

摘要

電鑄深度在1mm以上之高深寬比之母模，因質傳僅靠擴散達成，不但效率低且金屬離子之游離長度只侷限數十微米距離，因此本研究運用脈衝磁場與電場產生瞬間Lorentz force使離子彎曲進入孔洞中以補充電鑄過程中消耗之離子，以降低濃度極化、陰極極化、鑄層缺陷等現象，同時提高電鑄速率與品質。

並列摘要

When electroforming is performed to coat the dies with high aspect ratio molds and a depth greater than 1 mm, efficiency is low because mass transfer relies on diffusion only and metal ions have a free length of merely several tens of microns. In this study a mathematical model is developed to evaluate the feasibility of employing a pulsed magnetic and electric fields to generate an instantaneous Lorentz force, which in turn induces ions to change direction and flow into holes to replenish ions consumed in the electroforming process. The results show that the employed approach reduces concentration polarization, cathodic polarization, and casting layer defects while electroforming rate and quality are improved.

並列關鍵字

Lorentz force ； electroforming ； ions