| 摘要 |
Workpieces which are electrochemically machined, are exposed to corrosion and stray attack by the electrolyte, over surfaces which are not required to be machined. The invention provides a cowl 22 around the workpiece 10 and its fixture 12, a space 24 being provided at the plane of the interface between parts to be machined and parts not to be machined. De-ionized water is pumped into the interior of cowl 22, at a pressure just sufficient to prevent electrolyte entering gap 24, thus protecting the necessary workpiece portions and the apparatus. |
