Application Of Signal Analysis Technology Inperformance Test Of CW Lathe

The signal analysis technique,after half a century of continuous evolution,has become an indispensable auxiliary analysis technology in modern industry.In the current field of lathe performance tests,the signal analysis technique can collect data about targets’ signal characteristics as needed,and convert or transform the collected data about signal characteristics into required signal forms by relevant computation method or analysis method.Therefore,in the general premise of economic integration,it is in full compliance with the current objective demands of ultra-precision industrial production to use the signal analysis technique in lathe performance tests.In this paper,relevant evaluation indexes of lathe operation performance are obtained through acquisition and sorting out of acoustic signals,vibration signals and other relevant signal information generated by the CW series horizontal lathe produced by Shenyang Lathe Co.,Ltd.during the running as well as the later specific computation and analysis.This signal analysis technique can not only reflect the overall performance and status of the lathe objectively and accurately but also conduct time-domain target signal analysis on the running status of target components within the lathe,which proves that the signal analysis technique is the most intuitive way to get noise parameters and vibration parameters of different parts of a lathe and has very practical significance in detecting defects of new products,remedying design imperfections,and improving frame structures.This paper mainly studies: firstly,theories and methods of the signal analysis technique,including signal analysis theory,fast Fourier transform theory,signal source analysis theory,and time-region detection theory.As for the part applying theories to practices,the study is mainly focused on: the vibration signal identification,acquisition sensor and vibration signal parameter analysis and processing modules of performance test of the target lathe part(usually a part with bearings or a gear set at a joint);the acoustic signal identification,acquisition sensor,its acoustic signal parameter analysis and processing,and so on;secondly,as for signal analysis based design of lathe performance test and study of relevant principles,the discussions and analyses are conducted mainly from two aspects,namely the performance test design principles and relevant scheme design of the CW series lathe;at last,a test is performed on an instance of CW6163X1500 horizontal lathes in accordance with the contents of the performance test design,with data summarization,recording,and relevant analysis study being done mainly focused on actual measurement analyses of vibration signal frequencies and energy ratio signals of the CW series lathe.Since no performance related problems occur to the target lathe chosen in the test,a special reference is made to the performance problem having occurred to the transmission gear set of this lathe in 2014,so as to conduct a supplementary study on the specific application of the signal analysis technique in performance tests.