Internal spraying type cooling main shaft precision self-healing method

The invention discloses an internal spraying type cooling main shaft precision self-healing method, and belongs to the technical field of numerical control machine tool main shaft thermal deformation.A relation model among the thermoelectric refrigerator current, machine tool state parameters and the machine tool key point temperature is established, and an internal spraying type main shaft temperature field active control strategy function and an active control system are formulated according to the relation model; and when a main shaft is self-healing, the input current of a thermoelectricrefrigerator is changed in real time according to the temperature value of a key point and the operation state of a machine tool, so that the temperature field of the machine tool is controlled, and self-healing of the thermal tilt error is realized. According to the method, the thermoelectric refrigerator is adopted as an active thermal controller, the temperature of a thermal inclination error control sensitive point of