Time-position mapping method for monitoring data and cutting position

In numerical control machining, the production scene data is an important basis for studying processing technology and optimizing processing parameters, which can be collected, processed and analyzed in real time. However, processing data measured by extra equipment on the machine tool are all in time dimension, while cutting position parameters of the machine tool are in spatial dimension. Thus, there is no one-to-one correspondence between the monitoring data and cutting position, which is inconvenient to research various coupling relationships of the workpiece in machining process. This paper presents a time-position mapping method for the monitoring data and the cutting position, where data are collected by the acquisition device and the data acquisition software in the same frequency. Time zeroing at the marked position synchronizes the data acquisition processes in time dimension, which realizes the time-position mapping between the monitoring data and the cutting position. Based on Siemens 840D numerical system, linear and curvilinear motion milling experiments with different feed rates verify the accuracy of the collected data from the acquisition software. Boss with different heights cutting experiments show the correctness of the time-position mapping between the monitoring data and the cutting position.