Study on effective delivery conditions of grinding fluid - Evaluation of fluid film in the gap of the contact area.

In this paper, the film thickness of grinding fluid actually existing in the micro-gap of the wheel-work contact area was investigated experimentally and effective delivery conditions of the grinding fluid were discussed. The results obtained here are summarized as follows : (1) The film thickness can be identified from measuring its electric resistance. (2) There exist two processes for carrying the fluid suppied from a nozzle into the wheel-work conatct area. They are (a) the fluid adheres on or permeates into the wheel and is carried into the contact area by the wheel rotation, (b) the fluid enters the contact area directly from the grinding nip. Though the latter process is generally far effective in comparison with the former one, the reverse is also possible depending on delivery conditions of the grinding fluid. (3) Most effective nozzle setting angles with various delivery conditions of the grinding fluid, such as nozzle setting position φ, flow rate Q, etc., were made clear.