Intelligent warm-up method of machine tool

A warm-up method of a machine tool, applicable to a machine tool, comprising the steps of:

• based on temperature change data and thermal displacement data of a spindle measured at different time points, establishing a thermal compensation model;
• while the machine tool performs a warm-up process, inputting temperature change values measured at least one component of the machine tool at intervals to the thermal compensation model to obtain corresponding thermal-displacement estimated values of the spindle at different time points and changes of thermal displacement values at individual time points;
• and
• based on the changes of the thermal displacement values at the individual time points, deriving a corresponding warm-up completion degree for each individual time point;
• wherein establishing the thermal compensation model includes:
• defining the temperature change values of the at least one component of the machine tool collected at the different time points to be input values;
• defining displacement values of a tip point of the spindle collected at the different time points to be output values includes mounting at least one displacement sensor to the machine tool for measuring the displacement value of the tip point of the spindle;
• and
• based on the input values and the output values, establishing the thermal compensation model;
• wherein obtaining the corresponding thermal-displacement estimated values of the spindle at the different time points and the changes of the thermal displacement values at the individual time points includes:
• inputting the temperature change values to the thermal compensation model to obtain the thermal-displacement estimated values of the tip point of the spindle at the different time points;
• and
• calculating the changes of the thermal displacement values at the individual time points.