Electrochemical machining method and apparatus

An electrochemical machining method comprising:

• disposing a machining electrode and a workpiece in ultrapure water in such a state that a predetermined space is formed between said machining electrode and said workpiece, and that a rotating shaft of said machining electrode is parallel to a surface of said workpiece;
• disposing a catalyst for dissociating water molecules into hydrogen ions and hydroxide ions, between said machining electrode and said workpiece;
• applying a voltage between said machining electrode and said workpiece;
• and
• supplying ultrapure water between said machining electrode and said workpiece while said machining electrode is being rotated.

An electrochemical machining method comprising:

• disposing a machining electrode and a workpiece in ultrapure water in such a state that a predetermined space is formed between said machining electrode and said workpiece;
• disposing a catalyst for dissociating water molecules into hydrogen ions and hydroxide ions, between said machining electrode and said workpiece;
• applying a voltage between said machining electrode and said workpiece;
• and
• rotating one of said machining electrode and said workpiece while said catalyst and said workpiece are brought into line contact with each other.

An electrochemical machining method comprising:

• disposing a machining electrode and a workpiece in ultrapure water in such a state that a predetermined space is formed between said machining electrode and said workpiece;
• disposing a catalyst for dissociating water molecules into hydrogen ions and hydroxide ions, between said machining electrode and said workpiece;
• applying a voltage between said machining electrode and said workpiece;
• and rotating one of said machining electrode and said workpiece while said catalyst and said workpiece are brought into point contact with each other.

An electrochemical machining method comprising:

• disposing a machining electrode and a workpiece in ultrapure water;
• disposing a catalyst for dissociating water molecules into hydrogen ions and hydroxide ions, between said machining electrode and said workpiece;
• applying a voltage between said machining electrode and said workpiece;
• and
• supplying high pressure ultrapure water between said machining electrode and said workpiece from the upstream side of a direction of rotation of at least one of said machining electrode and said workpiece in such a manner that said high pressure ultrapure water is revolved while at least one of said machining electrode and said workpiece is being rotated.