Patent ID: 6969459

Claim:
A processing apparatus comprising: a processing machine equipped with a tool for processing a work; and a processing oil supply means for supplying a water insoluble oil in a form of mist to a processing site on the work as a processing oil, wherein said processing oil supply means includes a quantity of said water insoluble oil; a lubricating oil supply means for supplying a water insoluble oil having the same chemical composition as the processing oil to a lubricating section of the processing machine as a lubricating oil, wherein said lubricating oil supply means includes a supply of said water insoluble oil; a cleaning liquid supply means for supplying a water soluble cleaning liquid to the work after having been processed; a recovery means for recovering a used processing oil, a used lubricating oil, and a used cleaning liquid from the processing apparatus; a separation means for separating the recovered processing oil, the recovered lubricating oil, and the recovered cleaning liquid into a separated water insoluble oil and a separated cleaning liquid; a first circulation means for circulating the separated water insoluble oil into at least the processing oil supply means among the processing oil supply means and the lubricating oil supply means; and a second circulation means for circulating the separated cleaning liquid into the cleaning liquid supply means.