Heat balance method and system for frictional heating of machine tool guide rail for precision type horizontal machining center

The invention provides a heat balance method and system for frictional heating of a machine tool guide rail for a precision type horizontal machining center. A heating board (9) is additionally arranged at the bottom of a machine tool body (1). Two temperature detection sensors (10) are additionally arranged in a cast cavity of the machine tool body. A heating board (11) is additionally arranged at the rear portion of a stand column (2). Two temperature detection sensors are additionally arranged in a cast cavity of the stand column. A heating board (12) is additionally arranged at the rear portion of a sliding base (4). Two temperature detection sensors are additionally arranged in a cast cavity of the sliding base. The temperature sensors and the heating boards are connected with a numerical control module (15). The numerical control module calculates the temperature difference values of the sensors in the cavities of all the structural components. When the temperature difference values are larger than the set value, the heating boards are controlled to conduct heating; and when the temperature difference values are smaller than the set value, the heating boards are controlled to stop heating. By means of the heat balance method and system, changes, caused by heating of the guide rail, of the machine tool space accuracy of the structural layout are inhibited effectively, and the stability of a machine tool is improved.