Temperature control device for machine tool

A temperature control device for a machine tool which performs temperature control by circulating cooling oil to a heat-generating part of the machine tool, the temperature control device comprising:

• a machine body temperature sensor which measures a machine body temperature at a portion of a machine body of the machine tool separated from the heat-generating part,
• a return oil temperature sensor which measures a temperature of the cooling oil which circulates in the machine tool and which is collected by the temperature control device,
• an oil controller, comprising at least two oil control modules each having a tank for accommodating the cooling oil, a pump for circulating the cooling oil, and a cooler for lowering the temperature of the cooling oil, the oil control modules configured to control the temperature of the cooling oil supplied to the machine tool such that the temperature of the cooling oil detected by the return temperature sensor is synchronized with a reference temperature set based on the machine body temperature, the oil control modules configured such that the respective tanks are in communication with each other and so as to be connected in parallel to the machine tool, and
• a piping connection manifold for uniformizing convergence of the cooling oil supplied from the oil controller to the machine tool and branching of the cooling oil collected from the machine tool to each of the oil control modules.