Numerical control machine tool electric spindle temperature compensation method and device

Abstract

The invention provides a numerical control machine tool electric spindle temperature compensation method and device. The method comprises the following steps that the axis temperature of an electric spindle of a numerical control machine tool is acquired in real time, the change degree of the temperature is obtained based on the axis temperature of the electric spindle, whether the change degree of the temperature exceeds a corresponding preset threshold value or not is judged, moreover, when the change degree of the temperature exceeds the corresponding preset threshold value, the telescopicamount of the electric spindle is obtained based on the axis temperature of the electric spindle, and coordinates of the electric spindle are compensated based on the telescopic amount of the electricspindle. According to the method and the device, the expansion amount generated by the electric spindle and caused by the rise of the temperature due to the high-speed rotation in the working processof the electric spindle can be compensated or eliminated, so that the size error generated in the process of machining a workpiece by using a cutter at the end of the electric spindle due to the temperature change of the electric spindle is eliminated.

Description

technical field [0001] The invention relates to the technical field of numerical control machine tools, in particular to a temperature compensation method and device for an electric spindle of a numerical control machine tool. Background technique [0002] A CNC machine tool is an automated machine tool equipped with a program control system. The control system can logically process programs with control codes or other symbolic instructions, decode them, express them in coded numbers, and input them into the numerical control device through the information carrier. After calculation and processing, various control signals are sent by the numerical control device to control the movement of the machine tool, and the parts are automatically processed according to the shape and size required by the drawing. [0003] The electric spindle is a new technology that integrates the machine tool spindle and the spindle motor in the field of CNC machine tools. Among them, the machine ...

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Problems solved by technology

[0004] When the spindle of the CNC machine tool is rotated at high speed to drive the tool to process the workpiece, the temperature of the spindle is high due to the high-speed rotation of the spindle, and the spindle will be affected by thermal expansion and contraction, resulting in elongation (0.04mm-0.10 mm), which reduces the machining accuracy of the machine tool spindle, resulting in an error in the size of the processed workpiece

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