Research On Monitoring System Of Machining Process Based On LabVIEW

NC machining has become the mainstream that has made great contributions to the development of manufacturing industry. In order to ensure the normal operation of the quality of products and production equipment, no matter what kind of machining method, must monitor lively the cutting force, temperature, noise parameters in the cutting process. This thesis establishes the cutting state monitoring platform based on Lab VIEW, completes real-time monitoring the above parameters and the data processing.First of all, this thesis create the test system, discusses the measurement method of cutting force, cutting temperature and noise and gets the signal using the Kistler dynamometer, infrared thermography and acoustic emissionsensor; Building the system hardware be based on data acquisition system(NI c DAQ) of NI company;designing calibration of the dynamometer for force measuring instrument accuracy in measurement.Secondly, according to the characteristics of the test system, the thesis designs the monitoring system software part that mainly includes data acquisition, data processing,data storage and data playback module, using virtual instrument software Lab VIEW.Thirdly, Loading fixed load to calibrate Kistler dynamometer,and then according to the method of linear regression analysis,get calibration coefficient equation of the dynamometer.Finally, do the experiment of milling on the composition design of system hardware and software platform. verifying the practicability of the experiment platform through the milling experiments on 7075 aviation aluminum alloy thin-wall parts. Using orthogonal experiments, a total of 9 groups of milling experiments, to verify the reliability and accuracy of the system. In summary, the cutting process monitoring system is feasible, and has good practical value. Lays a foundation for further implementation of the adaptive control of machining process.