Determining method and determining system for instantaneous temperature of front cutter face of integral type flat-end milling cutter

The invention discloses a determining method and determining system for instantaneous temperature of a front cutter face of an integral type flat-end milling cutter. The determining method comprises the following steps of establishing a model of an instantaneous contact angle between the milling cutter and a workpiece; establishing an undeformed chip thickness model under the conditions that the milling cutter and the workpiece do not deform or vibrate and a cutting edge cuts in from a position at a distance from a processed surface during milling of each time; calculating the undeformed chipthickness according to the undeformed chip thickness model; establishing a temperature field model of generating a temperature rise influence on the front cutter face of the milling cutter by a firstdeformed zone heat source; establishing a temperature field model of generating a temperature rise influence on the front cutter face of the milling cutter by a second deformed zone heat source; and calculating the instantaneous temperature of the front cutter face of the milling cutter according to a first temperature field model, a second temperature field model and a temperature field model ofthe front cutter face of the milling cutter. By establishing the temperature field models of the first deformed zone heat source and the second deformed zone heat source, the accuracy of monitoring the temperature of the milling cutter during milling is enhanced.