Micro-milling force measurement method based on power of main drive system of micro-milling machine

Abstract

The invention belongs to the field of micro-milling force measurement and relates to a micro-milling force measuring method based on micro-milling machine main drive system power. The measuring method includes the steps that a power acquisition module and an NI data acquisition box with a PXI data acquisition module are adopted for measurement; a segmented cyclic sampling method is adopted in the acquisition software programming process, a cycle program is nested outside a LabVIEW data acquisition module, data information obtained after each cycle is temporally stored in a memorizer, data information obtained after next cycle is spliced, and finally complete data information is obtained. The method has the advantages of being high in sampling frequency and precision, simple in erection and use process and the like, the erection and use process is simple, and cost is low. The requirements for measurement of the micro-milling machine main drive system power can be met, the measuring precision of micro-milling force is guaranteed, and practical application value is achieved.

Description

technical field [0001] The invention belongs to the field of micro-milling force measurement and relates to a micro-milling force measurement method based on the power of a main transmission system of a micro-milling machine. Background technique [0002] At present, micro-milling force measurement mainly focuses on the use of load cells, but considering the small force level of micro-milling, general-precision force sensors cannot meet the measurement requirements, high-precision force sensors are expensive, and inconvenient to build and operate; and At present, the research on the power and energy consumption acquisition system of the main drive system of machine tools is relatively extensive. Considering the calculation relationship between cutting power and cutting force, it can provide a new idea for the measurement of micro-milling force. [0003] Liu Shuang et al.’s invention patent titled "On-line Monitoring Method of Energy Consumption Information in the Processing ...

AI Technical Summary

Problems solved by technology

[0002] At present, micro-milling force measurement mainly focuses on the use of load cells, but considering the small force level of micro-milling, general-precision force sensors cannot meet the measurement requirements, high-precision force sensors are expensive, and inconvenient to build and operate; and At present, the research on the power and energy consumption acquisition system of the main drive system of machine tools is relatively extensive. Considering the calculation relationship between cutting power and cutting force, it can provide new ideas for micro-milling force measurement

[0003] Liu Shuang et al.’s invention patent titled "On-line Monitoring Method of Energy Consumption Information in the Processing Process of the Main Transmission System of Machine Tools", ZL201110095627.6, discloses an online monitoring method of energy consumption information in the processing process of the main transmission system of machine tools. Input power, use the established mathematical model of the energy flow of the main drive system and the main energy consumption information in the machining process of the machine tool to obtain the real-time data of the energy consumption information of the main drive system of the machine tool, but the operation process of this method is cumbersome and the accuracy is not high

Tang Renzhong et al. have an invention patent titled "A Method for Acquiring Non-cutting Energy Consumption of the Main Drive System of a CNC Lathe", CN201210240326.2. The disclosed scheme is to obtain the no-load power of the main drive system inverter and the spindle motor through experiments, and the spindle is idling The coefficient values ​​in the model such as friction torque, moment of inertia of the main drive system, and spindle angular acceleration can be used to calculate the power and energy consumption values ​​of the spindle no-load and spindle acceleration, but this method has low accuracy and cannot meet the requirements of the main drive of the micro-milling machine System Power Measurement Requirements

[0004] To sum up, the existing power and energy consumption acquisition technology of the main drive system of machine tools has problems such as low precision, which cannot meet the requirements of the measurement of the power of the main drive system of the micro-milling machine and the further micro-milling force.

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