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The Design of Virtual Instrument for Lathe Noise Source Identification Based on LabVIEW

Author: LiangJunPeng
Tutor: JinJianXin
School: Huazhong University of Science and Technology
Course: Mechanical and Electronic Engineering
Keywords: Lathe Noise Source Identification Virtual Instrument LabVIEW
CLC: TG51
Type: Master's thesis
Year: 2007
Downloads: 243
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Abstract

To the common lathes, their main drive parts are gears, the headstock gear-joggling noise is the main reason which results the sound pressure goes beyond the standard. Not only the traditional noise measurement instruments are very expensive but also they are too professional and difficult to use for some workers. Formerly, some lathe factories distinguish the gear which brings the greatest noise depend on the worker’s ears. The practice bears out that not only its efficiency is very low, but also it is always wrong. So, it is very exigent to find an economical, fast, scientific, exact method to identify noise source in the lathe. Recently computer technology develops very quickly and it makes Virtual Instrument (shortly: VI) technology has a universal application. Around how to design a VI to identify noise source in the lathe, this thesis have done the following works:Firstly, on the basis of looking up the concerned technical literature and data both domestic and abroad, this thesis studies how to identify noise source in the lathe in theory. It also analyzes what the buildup of the lathe noise is and how the noise works, and it also carries out the research about the methods and essential principle of identifying the gear noise source.Secondly this thesis introduces the VI technology to perform the testing work. The thesis discusses how to choose the hardware and software of this VI. About the hardware, the thesis advises using ordinary microphone as sound sensor, takes the sound card of the personal computer as the simple DAQ (Data Acquisition) card. About the software, this thesis suggests using LabVIEW which issued widely in computer aided test field by the American National Instruments Corporation as the basic software program. It performs a group of program to carry out collecting and storing the noise signature, showing and taking the power spectrum analysis about it and designs a front panel for this VI.At last, we carry out some noise tests and analysis on the CL6240 saddle lathe using this VI. The test process proves that this VI is fit for testing and identifying noise source in the lathe.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > Turning and lathe ( lathe )
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