Air cooling device for controlling thermal deformation of spindle box of vertical machine tool

Abstract

The invention discloses an air cooling device for controlling thermal deformation of a spindle box of a vertical machine tool, which comprises a spindle motor, the spindle box and an upright post, wherein a cover is arranged outside the spindle box; the cover and the spindle box form a closed space and the cover covers the spindle motor; the upper end of the cover is provided with a cooling fan and a ventilating hole; a cushion block is arranged between the spindle motor and the spindle box to ensure that a ventilating hole is formed between the spindle motor and the spindle box; the spindle box and the upright post are provided with ventilating holes; and the ventilating holes form a loop. The air cooling device performs forcible air cooling on a motor of a driving spindle and spindle box components of the machine tool through the fan to reduce the temperature of a spindle box system, and is provided with more heat insulating blocks to reduce the heat transferred from the motor to the spindle box to finally ensure that the temperature of the spindle box is distributed uniformly and the aim of improving the thermal stability of the machine tool is fulfilled.

Description

technical field [0001] The invention relates to an air cooling device for controlling thermal deformation of a spindle box of a vertical processing machine tool (including a vertical processing center, a vertical lathe, a drilling machine, a milling machine, etc.), and belongs to the technical field of machine tool thermal design. Background technique [0002] In order to improve the production efficiency of machine tools, the spindle is developing towards high speed and high power. The spindle bearings and drive motors generate a lot of heat, which leads to uneven temperature field of machine tool components and thermal deformation. The thermal effect seriously affects the machining accuracy. The heat generated by the bearing can be taken away by the compressed air lubricated by oil and air. This method can effectively reduce the heat transferred to the machine tool headstock; and the heat generated by the motor is blown away by its own cooling fan, and most of the rest is p...

AI Technical Summary

Problems solved by technology

[0002] In order to improve the production efficiency of machine tools, the spindle is developing towards high speed and high power. The spindle bearing and drive motor generate a lot of heat, which leads to the uneven temperature field of the machine tool components and thermal deformation. The thermal effect seriously affects the machining accuracy.

The heat generated by the bearing can be taken away by the compressed air lubricated by oil and air. This method can effectively reduce the heat transferred to the machine tool headstock; and the heat generated by the motor is blown away by its own cooling fan, and most of the rest is passed through the motor. The end face is transferred to the spindle box, which causes the spindle box to generate an uneven temperature field, and the structure undergoes thermal deformation, resulting in the drift of the spindle end face

[0003] In order to eliminate the influence of thermal effects on the machining accuracy of machine tools, the most effective way is to establish a thermal error model of a specific machine tool, predict thermal errors and realize real-time compensation in the numerical control system, but many temperature sensors and corresponding data acquisition systems are required, and The established thermal error model is not universal, the implementation cost is high, and it has not been widely used

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