The present existing wire cutting technology refers to a high-precision linear motor driving system operated with an electric discharge module of a Wire cutting machinery to provide an application of a wire cutting electric dischargemanufacturing.

In an electric discharge manufacturing process, manufacturers generally require using a manufacturing liquid as an electric discharge medium and a dipping method for a high-precision cutting manufacture of a workpiece.

A conventional Wire cutting machinery generally stores the manufacturing liquid in a fluid tank, and the fluid tank is built and passed through a tank wall by a lower arm for the manufacturing operation of a workpiece by a metal wire dipped in themanufacturing liquid.

It is a primary objective of the present invention to overcome the aforementioned shortcoming by providing a sealing apparatus having a circulating channel for a Wire cutting machinery, wherein a seal ring and a seal ring cover are engaged at alower arm to form a circulating channel, and a fluid is injected into the circulating channel to remove the working debrises attached on the lower arm.

The fluid tank may have an axial displacement with respect to the lower arm. If there is any working debris attached to a surface, the axial movement will be affected greatly. Further, a sealing member is installed between the lower arm and awall of the fluid tank, and the working debrises may ruin the seal, and thus there may be a risk of leaking the manufacturing liquid. Obviously, improvements are required.