ОСОБЕННОСТИ ПОВЕДЕНИЯ СМАЗОЧНО-ОХЛАЖДАЮЩЕЙ ЖИДКОСТИ (СОЖ) В ЗОНЕ КОНТАКТА ИНСТРУМЕНТА С ЗАГОТОВКОЙ

Abstract

The relevance of the issue selected for the study is proved by the fact that, when producing optical parts, the treatment using loose abrasive is replaced with the processes based on the application of fixed abrasive. However, the increase in efficiency causes the issues of the surface layer quality assurance. It is caused by the fact that the intensification of the stock removal process is inextricably connected with the heat output increase in the contact area of a tool with a workpiece. The paper presents the methodology of the study and the obtained observation results of fracturing behavior of lubricating-cooling fluid in the contact area of a tool and a workpiece. The temperatures in the area of treatment of optical materials determine considerably the quality of treated surface. During these processes, the lubricating-cooling fluid plays one of the key roles. It is impossible to develop the exact thermophysical model of the process of treatment without the true recording of lubricating-cooling fluid and its behavior. For the direct vision of the lubricating-cooling fluid behavior in the contact area of a tool with the treated surface, the author developed the method based on the strobing freeze application. A pulsed lamp is installed in such a way that the total internal reflection from the prism working surface would take place. In case, some body contacts with this surface, the total internal reflection gets broken and the dark spot with the actual contact geometrics can be observed. Using the device, it is possible to observe the treatment area. Carried out study allows concluding that the lubricating-cooling fluid is constantly present in the treatment area. All areas of the direct contact of a tool and a workpiece are surrounded with it. When using water-based lubricating-cooling fluid, there are no areas free of it at the applied velocity of cutting out of certain contact areas.