| 摘要 |
PROBLEM TO BE SOLVED: To provide a metal working oil circulation mechanism and a metal working oil circulation method which can reliably circulate sufficient metal working oil by reliably removing stainless steel fine powder from the working oil when manufacturing a stainless steel corrugated pipe by a corrugator, to stabilize product quality by stabilizing the manufacture, and to reduce costs by extending the lifetime of a corrugated ring.SOLUTION: The metal working oil circulation mechanism supplies metal working oil to a corrugated ring 14 when manufacturing a stainless steel corrugated pipe 16 by applying wave-shape corrugation working to a circumferential surface by pressing the corrugated ring 14 to a straight stainless steel pipe 12, and re-supplies the metal working oil recovered from a corrugator 10 after the working to the corrugated ring 14. A magnet filter 44 removing stainless steel metal powder from the metal working oil recovered from the corrugator 10 by magnetic force is provided. |
