| 摘要 |
<p>A liquid feeder (2) for electrodischarge machining comprises a reservoir (21) above which are provided an auxiliary tank (22) above a process tank (12), a filter (23), a first pump (P1) upstream from the filter, and a second pump (P2) downstream from the filter. The liquid from the process tank (12) is filtered through the filter (23) and forced into auxiliary tank (22) by the first and second pumps (P1, P2). The filtered liquid is sent from the auxiliary tank (22) to process tank (12). During electrodischarge machining, the liquid from the process tank (12) is filtered, cooled, and returned directly to the process tank (12). A jet pipe and a third pump (P3) are further provided in the circulation path. A relief pipe (K) including a relief valve (RV) is provided in parallel to the filter (23), and an adjust pipe (H) is provided as effective safety means in parallel to the first pump (P1) and the filter (23).</p> |
