| 摘要 |
<p>A dielectric fluid system (2) for an electric discharge machining apparatus comprises an auxiliary tank (22) positioned higher up than a work tank (12) on a dielectric fluid reservoir (21), a filter device (23), and a first pump (P1) and a second pump (P2) upstream and downstream of the filter device 23. Dielectric fluid in the dielectric fluid reservoir (21) is filtered by the filter device (23), and pumped to the auxiliary tank (22) using the first and second pumps (P1) and (P2). The filtered dielectric fluid is then rapid fed from the auxiliary tank (22) to the work tank (12). During electric discharge machining, dielectric fluid is pumped from the work tank (12), filtered, then cooled and circulated directly back to the work tank (12). A flushing pipeline and a third pump (P3) are added into the circulating pipeline. Also, a relief pipeline (K) containing a relief valve (RV) is provided in parallel with the filter device (23), and regulating pipeline (H) is provided as an effective safety measure in parallel with the first pump (P1) and the filter device (23). <IMAGE></p> |
