Method for actively controlling temperature of servo motor of main shaft of numerical control machine tool

Abstract

The technical problem to be solved by the invention is to provide the method for actively controlling the temperature of the servo motor of the main shaft of the numerical control machine tool from the source of a heat source of the numerical control machine tool. Data of a real-time temperature sensor arranged on a key part of a machine tool is collected to an HS-P9-E-R temperature input module, an electronic signal is fed back to a built-in PLC of a Huazhong 9 type numerical control system, a PID instruction provided by a PLC standard module is sent to an HIO-1073 board, the frequency of a water cooling machine frequency converter is controlled by taking a D / A analog quantity as an output quantity. Therefore, the circulating speed and the flow of a cooling system of the water cooling device are controlled, a closed-loop control effect is achieved, heat of a heat source is taken away, and finally the influence of thermal errors is reduced. In order to research the influence of the water outlet flow rate of a water cooling machine on the temperature reduction of a spindle servo motor, a method for actively controlling the temperature of the spindle servo motor of a numerical control machine tool is created.

Description

technical field [0001] The invention relates to the field of numerical control machine tools, and more specifically, to a method for active temperature control and cooling adjustment of a spindle motor of a high-grade precision numerical control machine tool. Background technique [0002] Modern machinery manufacturing tends to be more and more refined and precise. As the main equipment for precision machining, the precision requirements of CNC machine tools are also getting higher and higher. The geometric error, thermal error and force error of the digital machine tool account for 65% of the total error, which is the main factor affecting the machining accuracy of the digital machine tool, but the proportion of each error source is different under different working conditions. In the precision machining and ultra-precision machining of CNC machine tools, the influence of thermal errors accounts for a very large proportion, which can account for up to 70% of the total error...

AI Technical Summary

Problems solved by technology

Traditional high-end precision CNC machine tools eliminate the influence of thermal errors. One is to use the error compensation model to embed into the CNC system, and passively accept the detection value sent by the sensor to perform error compensation. However, due to the nonlinear time-varying process of thermal deformation , the general model is difficult to accurately track real-time thermal deformation, and the robustness of the model is not good enough

The second is to establish a constant temperature room, and place the CNC machine tool in the constant temperature room to actively adjust the temperature with a large air conditioner, but the initial investment and later operation and maintenance costs are extremely high

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