In the mechanical system ， where the phenomenon is happening all over the fhction and wear ， it i... more In the mechanical system ， where the phenomenon is happening all over the fhction and wear ， it is what is involved in the mainteriance and simplified mechanical system eMciency and by clarifying the Mction and wear phenomena ． Howeve ら diMcult in the Variety of factors that are involved ． It is unknown territory ． Brake materials that require highfhction ， wear resistance within it ． Use the 伍 ction and wear ， the phenomenon ， exert its effec し Because ． it dees qot knQ ． w ' the charaCteristics of tribology ， it is the state in the development fhmble brake materials ． Thereft ) re ， the 丘iction surfaee tried to clarif ン the mechanism of fセiction and wear that is observed in situ using a microscqpe mecllanism
ε田 皿a 丘 1sti加 te ofTechnolog ｝ -Gmduate Sdhooi ofEngineerj皿 9 1690Fusa 面 仕 ， FUka ン ash 西 Saitarn... more ε田 皿a 丘 1sti加 te ofTechnolog ｝ -Gmduate Sdhooi ofEngineerj皿 9 1690Fusa 面 仕 ， FUka ン ash 西 Saitarn4 369 -｛ ) 293， Japan C 類 皿 g 丗 ction and wear me ［ tianistn between parts in a lot of mechanical systerns has a btg m αai血 g use α gy lo路 and t齟 lc6s e 跏 1 脚 t issue frorn now en ． Ho 聞 1 1盻 臘 跏 d 山 e w m θd 血d 嘘 a1 α of plex ptenamena betWeen n 】 bbing surfaoes ， 血e 血e 〔 ry has n 〔寛厩 n e 曲 b舳 ed yet 皿 1 凱 h1 血 s 醜ud 乂 血 e w 【 esiStance of a pS ( 勲 ve plastic 皿m was evaluated by 一 situ〔iOservation with a c t 丘ic 直 on 田 sur 魚ce miq7 〔wwrPe ・ The pro ve plastic filrn used here is a 丘lm that has a selfH でoove ［ ing dharaCteriSic ， and the d〔 d is d曲 g 血 r鬮 t ) ears． Itお used
Transactions of the Japan Society of Mechanical Engineers. C, 2008
The relationship between acoustic emission (AE) signals and tribological phenomena in the element... more The relationship between acoustic emission (AE) signals and tribological phenomena in the elementary processes of friction and wear is examined. The elementary processes of friction and wear were observed by a frictional surface microscope which installed a friction system into the view of an optical microscope. In this paper, the elementary processes are focused on the plastic deformation of the friction surface and the formation of wear particles between friction surfaces. In-situ experiments with the frictional surface microscope were performed by a pin-on-block type sliding test for iron and zinc. The friction surface and its side face were also observed by an atomic force microscope. The results show that two kinds of AE signals, a continuous AE signal of low amplitude and a burst AE signal of high amplitude, are detected in the elementary processes of friction and wear. The continuous AE signal of low amplitude is detected by the generation of slip-lines and wear elements. The burst AE signal of high amplitude is detected by the formation of a transfer particle.
Adhesive and abrasive wear are the two main mechanisms of mechanical wear. Tribological propertie... more Adhesive and abrasive wear are the two main mechanisms of mechanical wear. Tribological properties between these wear mechanisms are very different. Since wear transition could be an obstacle to running machineries, it is important to identify the changes in wear state. In this study, to detect wear transition, changes in the frequency spectrum of acoustic emission (AE) signals were examined by the friction and wear experiments using metal pin and abrasive paper. It was found that wear transition could be identified from the occurrence of high frequency AE signals.
A study to investigate contact detection and recognition of the cutting state by means of the aco... more A study to investigate contact detection and recognition of the cutting state by means of the acoustic emission (AE) technique in ultra-precision turning is presented. Detection of accurate cutting-edge position was achieved through investigation of the contact limit between the cutting edge and workpiece through use of the AE technique. Moreover, to recognize the cutting state, changes in AE signals instigated by corresponding changes in the cutting condition were monitored. In the contact-detection experiment, contact between the cutting edge and workpiece was detected with a cut depth of 10 nm. Likewise, in the cutting state recognition experiment, AE signal waveforms were observed to demonstrate changes corresponding to changes in the cutting state. These results confirm the feasibility of using the AE technique in cutting state monitoring experiments.
A study to investigate contact detection and recognition of the cutting state by means of the aco... more A study to investigate contact detection and recognition of the cutting state by means of the acoustic emission (AE) technique in ultra-precision turning is presented. Detection of accurate cutting-edge position was achieved through investigation of the contact limit between the cutting edge and workpiece through use of the AE technique. Moreover, to recognize the cutting state, changes in AE signals instigated by corresponding changes in the cutting condition were monitored. In the contact-detection experiment, contact between the cutting edge and workpiece was detected with a cut depth of 10 nm. Likewise, in the cutting state recognition experiment, AE signal waveforms were observed to demonstrate changes corresponding to changes in the cutting state. These results confirm the feasibility of using the AE technique in cutting state monitoring experiments.
The Proceedings of the Symposium on Evaluation and Diagnosis, 2010
From the viewpoint ofmonitoring and maintenanoe ( especiaUy conditi nbased maintenance ) ofmacbin... more From the viewpoint ofmonitoring and maintenanoe ( especiaUy conditi nbased maintenance ) ofmacbinery ， it is extremely important to recognlze and guantify friction and wear phenomena， such as the progress orwear and the state of friction at interfaces ， An ac ustic ernission ( AE ) is量 ntimate 】 y related to the deformation and fracture ofmaterials and the AEbased method is use 佃 in obtaining 且 arge quantities of ｛ nformation relating to 行iction and wear pbenomena ． Accordingly ， the AE method ， unlike other estimation methods jn current use ， permits direct estimatlons and is very effective fbr the inprocess monitoring of 重 he state of rubbing surfaees ． For the recognition and quantification of friction and wear phenomena ， it is necessary to e ［ ucidate the relationship between AE signa ［ s and fricl ｛ on and wear phenomena ． However ， little is known regarding the relationship between AE and 丘iction and wear phenomena， because of the complexity of su じh phenomena ， To mitigate the compiexit ｝ -not only experiments by repeated rubbing ( a typicaI experimental method ) ， but also experiments wlth the sirnplified frictjon systems have been perfbrmed in this study ． As a resuk ， the features of the AE parameters and the AE frequencies were revealed fbr the quantitative evaluatjon of wear state ． Key Mords ：Acoustic Emission ， Wear ， Sllding Friction ， Frequency Analysis ， Conditlon Based Majntenance
In the mechanical system ， where the phenomenon is happening all over the fhction and wear ， it i... more In the mechanical system ， where the phenomenon is happening all over the fhction and wear ， it is what is involved in the mainteriance and simplified mechanical system eMciency and by clarifying the Mction and wear phenomena ． Howeve ら diMcult in the Variety of factors that are involved ． It is unknown territory ． Brake materials that require highfhction ， wear resistance within it ． Use the 伍 ction and wear ， the phenomenon ， exert its effec し Because ． it dees qot knQ ． w ' the charaCteristics of tribology ， it is the state in the development fhmble brake materials ． Thereft ) re ， the 丘iction surfaee tried to clarif ン the mechanism of fセiction and wear that is observed in situ using a microscqpe mecllanism
ε田 皿a 丘 1sti加 te ofTechnolog ｝ -Gmduate Sdhooi ofEngineerj皿 9 1690Fusa 面 仕 ， FUka ン ash 西 Saitarn... more ε田 皿a 丘 1sti加 te ofTechnolog ｝ -Gmduate Sdhooi ofEngineerj皿 9 1690Fusa 面 仕 ， FUka ン ash 西 Saitarn4 369 -｛ ) 293， Japan C 類 皿 g 丗 ction and wear me ［ tianistn between parts in a lot of mechanical systerns has a btg m αai血 g use α gy lo路 and t齟 lc6s e 跏 1 脚 t issue frorn now en ． Ho 聞 1 1盻 臘 跏 d 山 e w m θd 血d 嘘 a1 α of plex ptenamena betWeen n 】 bbing surfaoes ， 血e 血e 〔 ry has n 〔寛厩 n e 曲 b舳 ed yet 皿 1 凱 h1 血 s 醜ud 乂 血 e w 【 esiStance of a pS ( 勲 ve plastic 皿m was evaluated by 一 situ〔iOservation with a c t 丘ic 直 on 田 sur 魚ce miq7 〔wwrPe ・ The pro ve plastic filrn used here is a 丘lm that has a selfH でoove ［ ing dharaCteriSic ， and the d〔 d is d曲 g 血 r鬮 t ) ears． Itお used
Transactions of the Japan Society of Mechanical Engineers. C, 2008
The relationship between acoustic emission (AE) signals and tribological phenomena in the element... more The relationship between acoustic emission (AE) signals and tribological phenomena in the elementary processes of friction and wear is examined. The elementary processes of friction and wear were observed by a frictional surface microscope which installed a friction system into the view of an optical microscope. In this paper, the elementary processes are focused on the plastic deformation of the friction surface and the formation of wear particles between friction surfaces. In-situ experiments with the frictional surface microscope were performed by a pin-on-block type sliding test for iron and zinc. The friction surface and its side face were also observed by an atomic force microscope. The results show that two kinds of AE signals, a continuous AE signal of low amplitude and a burst AE signal of high amplitude, are detected in the elementary processes of friction and wear. The continuous AE signal of low amplitude is detected by the generation of slip-lines and wear elements. The burst AE signal of high amplitude is detected by the formation of a transfer particle.
Adhesive and abrasive wear are the two main mechanisms of mechanical wear. Tribological propertie... more Adhesive and abrasive wear are the two main mechanisms of mechanical wear. Tribological properties between these wear mechanisms are very different. Since wear transition could be an obstacle to running machineries, it is important to identify the changes in wear state. In this study, to detect wear transition, changes in the frequency spectrum of acoustic emission (AE) signals were examined by the friction and wear experiments using metal pin and abrasive paper. It was found that wear transition could be identified from the occurrence of high frequency AE signals.
A study to investigate contact detection and recognition of the cutting state by means of the aco... more A study to investigate contact detection and recognition of the cutting state by means of the acoustic emission (AE) technique in ultra-precision turning is presented. Detection of accurate cutting-edge position was achieved through investigation of the contact limit between the cutting edge and workpiece through use of the AE technique. Moreover, to recognize the cutting state, changes in AE signals instigated by corresponding changes in the cutting condition were monitored. In the contact-detection experiment, contact between the cutting edge and workpiece was detected with a cut depth of 10 nm. Likewise, in the cutting state recognition experiment, AE signal waveforms were observed to demonstrate changes corresponding to changes in the cutting state. These results confirm the feasibility of using the AE technique in cutting state monitoring experiments.
A study to investigate contact detection and recognition of the cutting state by means of the aco... more A study to investigate contact detection and recognition of the cutting state by means of the acoustic emission (AE) technique in ultra-precision turning is presented. Detection of accurate cutting-edge position was achieved through investigation of the contact limit between the cutting edge and workpiece through use of the AE technique. Moreover, to recognize the cutting state, changes in AE signals instigated by corresponding changes in the cutting condition were monitored. In the contact-detection experiment, contact between the cutting edge and workpiece was detected with a cut depth of 10 nm. Likewise, in the cutting state recognition experiment, AE signal waveforms were observed to demonstrate changes corresponding to changes in the cutting state. These results confirm the feasibility of using the AE technique in cutting state monitoring experiments.
The Proceedings of the Symposium on Evaluation and Diagnosis, 2010
From the viewpoint ofmonitoring and maintenanoe ( especiaUy conditi nbased maintenance ) ofmacbin... more From the viewpoint ofmonitoring and maintenanoe ( especiaUy conditi nbased maintenance ) ofmacbinery ， it is extremely important to recognlze and guantify friction and wear phenomena， such as the progress orwear and the state of friction at interfaces ， An ac ustic ernission ( AE ) is量 ntimate 】 y related to the deformation and fracture ofmaterials and the AEbased method is use 佃 in obtaining 且 arge quantities of ｛ nformation relating to 行iction and wear pbenomena ． Accordingly ， the AE method ， unlike other estimation methods jn current use ， permits direct estimatlons and is very effective fbr the inprocess monitoring of 重 he state of rubbing surfaees ． For the recognition and quantification of friction and wear phenomena ， it is necessary to e ［ ucidate the relationship between AE signa ［ s and fricl ｛ on and wear phenomena ． However ， little is known regarding the relationship between AE and 丘iction and wear phenomena， because of the complexity of su じh phenomena ， To mitigate the compiexit ｝ -not only experiments by repeated rubbing ( a typicaI experimental method ) ， but also experiments wlth the sirnplified frictjon systems have been perfbrmed in this study ． As a resuk ， the features of the AE parameters and the AE frequencies were revealed fbr the quantitative evaluatjon of wear state ． Key Mords ：Acoustic Emission ， Wear ， Sllding Friction ， Frequency Analysis ， Conditlon Based Majntenance
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