Acoustic Emission Characteristics in Wood Sanding Amplitude distribution of acoustic emission in disc sanding process
Hiroshi Matsumoto, Yasuhide Murase · Journal of the Faculty of Agriculture Kyushu University · 1998
Th ~ p llrpose of this study is t.o obtain t.he hasic knowledge on acoustic emi ssiOll CAE) r:h arac1.e:ristics ill wood sanding processIn san ding parallel and perpendicular t.o the grain , the ,4£ event cuunt.rate decreased with increas ing s a!l(lin~ time and f.hi.<; tendency was similar to t.he varia1.ion of stock removal rate with fianding timC'.The ampli t ude distrih ut.ion of AJ:: signal shov,, -ecl a tendency that.t he AE event.count rat.es were greate r [o r lower threshold vo lta ge and lhe y decreased wit.h iw:re asing threshold voltage.Although the AF.event.enunt ra tes were greater in lower threshold \roltage fo r li ne r grit size, tIley decreased with incr~a:;i ug :;(tuding time at eac h threshold voltagc.Hot.h the AE event count rate ami th~ amplitude distribution 01" Ai::: signa l in saIuJing perpendicula r to Lhe gr..ti n we re greater and wide r than these values in sa nding paraUcJ to the graln , respect.ively.It was found that the AEs ..... i1.h low ampJit.uclc\' V-cre greate r fo r fi ner grit size and the AE s with high ampJjtude were greaLer for coarser grit size.It was suggested lhaL the f OTI II of 3mplit.udedistributio n or AF.signal with sanding tim e does /lOt.cha nge a lthough the AE event.count rate deereuse with inercasing sanding lime.