Acquisition and energy-saving control method of power consumption of CNC machine tool spindle rotation acceleration

Abstract

The invention discloses an acquisition and energy-saving control method of spindle rotation acceleration power and energy consumption of a numerically controlled machine tool, comprising the following steps: Step 1, controlling the rotation of the spindle and obtaining the spindle rotation power equation P SR (n), wherein n is the spindle speed; step 2, obtain the design parameters, obtain the calculation formula of the spindle rotation acceleration power according to the spindle rotation power equation and the design parameters, and further obtain the calculation formula of energy consumption; step 3, change the spindle frequency converter The acceleration time of the spindle is calculated to obtain the peak value of the spindle rotation acceleration power and energy consumption; step 4, select the appropriate acceleration time of the spindle inverter to control the spindle, so that the peak value of the spindle rotation acceleration power is less than the preset upper limit and the energy consumption is the smallest. The present invention only needs to conduct a simple spindle rotation experiment, and then combines theoretical analysis and design and manufacturing parameters of the machine tool to obtain the power and energy consumption during the acceleration process of the spindle rotation of the CNC machine tool, and then perform energy-saving control on the machine tool.

Description

technical field [0001] The invention relates to the field of machine tool control, in particular to a method for acquiring and energy-saving control of the power consumption of the rotational acceleration of the spindle of a numerically controlled machine tool. Background technique [0002] Spindle rotation acceleration is the motion process in which the spindle starts from a standstill or accelerates from a lower speed to a higher speed. At present, the main drive system of CNC machine tools usually adopts the drive mode of "inverter + asynchronous motor + mechanical transmission", and realizes stepless speed regulation of the spindle by changing the output frequency of the inverter. Spindle rotation acceleration process has a lot of power and consumes a lot of energy in a short time. This part of the energy is not directly used to cut the workpiece material, which is an invalid energy waste. Therefore, it is urgent to study the method of obtaining the power and energy co...

AI Technical Summary

Problems solved by technology

The disadvantage of this invention is that all coefficients in the model are obtained through experiments, and the experiments and data analysis are complex, time-consuming and laborious; and the given model does not reflect the relationship between the design parameters of the machine tool and the energy consumption, and cannot be used to guide the energy-saving control of the machine tool

[0004] To sum up, the current patents mainly focus on the power acquisition and monitoring of the main drive system of the machine tool running at a constant speed, and there are few researches on the power of the main drive system when the speed changes

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