Research On Virtual Instrument Of Cutting Temperature Based On LabVIEW And MCU

Today,Hard Turning was taken more and more attention and interesting in the manufacturing domain in the world, but the mechanism and how to select the tools and parameters of the Hard Turning were worth researching. This paper was aimed at the need of research on mechanism of Hard Turning, and with the later technology of the testing, developed an Virtual Instrument which can be used to measure the cutting temperature in Hard Turning.The Virtual Instrument was composed of two parts—the hard ware and the soft ware. The hard ware included the type K thermocouple and Single-Chip computer P87LPC768. The thermocouple was sensor, which change temperature single to electric single, and the temperature sensor AD590 was used to cold junction compensation of the thermocouple. The electric single was acquired by the MCU after amplifier, the filter and A/D converter and then was sent to computer.The soft ware was based on LabVIEW, which was composed of three modules. The first was data acquisition, it invoked the VISA to read the data and then display in the Front Panel in time after calibration; in the data query and analysis module, a temperature database was found, and with the help of LabSQL the data of parameters and temperature were saved to the database, when input one query parameter,the data matched the condition were displayed in the result table, and two data can be compared by curve; the orthogonal experiment module was based on the orthogonal experiment method, when import the elements and their levels, the program can lead the experiment and give a dialog box before experiment which include the cutting parameters, when the whole experiment was completed, the result of orthogonal experiment was displayed in table, and if import one of the elements, a graph of the relationship between of the element and the temperature was given on the Front Panel, which can be used to analyze the influence to the cutting temperature by the element.The virtual instrument in this paper can be used to the research of the influence of cutting temperature and the optimum of cutting parameter when the cutting temperature was the criteria。...