The Research On Drilling Temperature In Deep Hole Processing And Design Of Virtual Temperature Measuring Instrument

With the fast development of modern manufacturing industry, deep hole processingtechnology is applied more widely. Because of the characteristics of deep hole processing, alarge number of cutting heat is difficult to diverge, resulting in higher drilling temperature inthe cutting zone. Higher drilling temperature will not only exacerbate the wear rate of the tool,then limit productivity, but also affect the performance of the tool workpiece, machinedsurface’quality and reduce machining accuracy. Therefore, the study of drilling temperature indeep hole processing is important for the analysis of the cutting mechanism and the actualproduction. With drilling temperature in deep hole processing as the object of the research,theoretical analysis, simulation, establishing measurement system and other means are takenas the study ways.The article describes the source of cutting heat and cutting temperature in the aspect oftheory. It analyzes the factors which affect cutting temperature in the drilling process, and theanti-impact that cutting temperature has on the relevant factors in the processing. Itsummarizes testing technology of cutting temperature in the machining work.DEFORM-3Dfinite element software is used to simulate the drilling process of three kinds of deep hole drill,including the multi-tooth BTA drill, the gun drill, and the deep hole twist drill. Simulation hasset different parameters to drill. Observing the temperature field distribution of the differentdeep hole drill when simulation is finished, the rule can be summarized between the speed,feed rate and other drilling conditions, and temperature. Through analyzing and comparingthe tool wear chart, the association between drilling temperature and tool wear will be foundout. A virtual instrument is established based on LabVIEW software platform, which is usedto test the drilling temperature in deep hole processing. Combining with data acquisition card, thermocouple and signal amplifier, the virtual instrument can achieve dynamic measurementfor drilling temperatures. The virtual instrument for data acquisition and processing has sixmodules, including information input, data acquisition, empirical formula of drillingtemperature, orthogonal experiments, data query and analysis, and thermocouple calibration.Its functions including displaying digital and graphic, data storage, data processing and others.The paper can provide some reference value for the study of drilling temperature andmeasurement in deep hole processing.