Methods and systems for forming turbulated cooling holes

摘要

An electrochemical machining (ECM) apparatus is provided. The electrochemical machining (ECM) apparatus includes an electrode (100) including at least one uninsulated section (110), and insulation that substantially circumscribes at least one section of the electrode, wherein the electrode is inserted into a starter hole to form a hole defined by at least one first section (140) having a first cross-sectional area and at least one second section (142) having a second cross-sectional area (130).