The thermal characteristic of integrated transfer machine is one of the important factors affecting the machining accuracy. Because the spindle speed and feed speed of the integrated transfer machine are much higher than those of ordinary machine tools, the hot cutting caused by large cutting parameters has a much more serious impact on the heat conduction of the workpiece and machine parts than that of ordinary machine tools, and the influence of thermal deformation on the machining accuracy is often difficult to be corrected by the operator. Therefore, special attention should be paid to the measures to reduce the influence of thermal deformation on CNC lathes.

The commonly used measures are as follows: 1, improve the layout and structural design of CNC lathes: such as the heat source for the more symmetrical use of thermal symmetry structure; CNC lathes adopt inclined bed, flat bed and inclined slide structure; Some heavy CNC machine tools use thermal balance measures due to structural limitations.

2, control temperature rise: the heating part of CNC lathe (such as spindle box, hydrostatic guide hydraulic oil, etc.) to take heat dissipation, air cooling and liquid cooling control temperature rise method to absorb the heat emitted by the heat source, is a more used in all kinds of CNC machine tools to reduce the influence of thermal deformation countermeasures.

3, take strong cold measures for the cutting parts: in the large cutting amount cutting, the amount of hot chips falling on the table, bed and other parts is an important heat source. Modern CNC machine tools, especially machining centers and CNC lathes, generally use multiple nozzles and large flow coolants to cool and remove these hot chips, and use large capacity circulation cooling of the coolants or cooling devices to control temperature rise.

4, thermal displacement compensation: predict the law of thermal deformation, establish a mathematical model stored in the computer for real-time compensation.

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