METHOD OF CONTROLLING TEMPERATURE OF MACHINE TOOL AND APPARATUS FOR PRACTICING SAME.

摘要

This invention relates to an apparatus for controlling the cooling of a heated unit in a machine tool, and a method of controlling the temperature of a machine tool by bringing a heating medium liquid into contact with a constituent element (41) constituting the machine tool and generating heat, so as to indirectly control the temperature of the constituent element (41) to a predetermined level. A heating medium liquid is brought into contact with the constituent element (41) to carry out heat exchanging, and the heating medium liquid is then cooled with a cooling medium in a heat exchanger (10), and the level of an increase of the sensible heat temperature of the cooled heating medium liquid is measured with a sensor (S2). The cooling temperature for the heating medium liquid is controlled by a PID temperature controller (3) in accordance with the level of an increase of this sensible heat.