Development of the optimum control technique regarding the forced cooling using mist of strong alkaline water (Development of the nozzle with the optimum specification and its evaluation on the cutting)

Abstract

In the 21^st century, as it is important to produce products with care for protecting the earth, a producer must be careful to conserve energy, save resources and reduce waste which pollutes environment. On the other hand, in case of a machine tool, much quantity of lubricating oil was used for smooth drive, electrical energy of forced cooling was used for high accuracy and much cutting oil was also used for lubrication and cooling. This is large problem for protecting the earth. Therefore the nozzle with the optimum specification was developed and evaluated for an environmentally-friendly. The calculation model for heat transfer coefficient regarding the mist of the strong alkaline water was firstly estimated. Then the nozzle with the optimum specification was developed by using the calculation model. The cooling properties of the forced cooling using the nozzle with the optimum specification was finally investigated and evaluated in several experiments. It is concluded from the results that; (1) Mist of strong alkaline water was very effective for forced cooling, (2) The optimum condition regarding the mist of strong alkaline water for forced cooling was cleared, (3) The nozzle with the optimum specification has very high heat transfer coefficient and is effective for long tool life.