Journal of Quality Engineering Society
Online ISSN : 2189-9320
Print ISSN : 2189-633X
ISSN-L : 2189-633X
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Volume 6, Issue 4
Displaying 1-8 of 8 articles from this issue
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  • Character Recognition Using Mahalanobis Distance
    Takashi Kamoshita, Ken-ichi Okumura, Kazuhito Takahashi, Masao Masumur ...
    1998 Volume 6 Issue 4 Pages 39-45
    Published: August 01, 1998
    Released on J-STAGE: June 10, 2016
    DOIhttps://doi.org/10.18890/qes.6.4_39
    JOURNAL FREE ACCESS
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    In　the　era　of　diversified　information,　the　demand　of　electronic　document　processing　is becoming　stronger　and　stronger.　Today,　it　is　indispensable　to　use　electronics　for　data　base processing.　The　methods　transforming　printed　documents　into　electronic　codes　have　been commercialized,　however,　technologies　to　recognize　hand　writing　have　not　been　well developed　yet. In　this　paper,　the　improvement　of　hand　writing　recognition,　which　is　to　recognize　the　pattern of　multi-dimensional　information,　was　studied　using　MTS　(Mahalanobis-Taguchi　System). It　has　been　confirmed　the　application　of　MTS　is　effective　for　multi-dimensional　information. This　study　aimed　to　apply　the　method　to　a　new　field　of　multi-dimensional　information processing.
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  • Optimization　of　Worm　Processing　Conditions
    Masatoshi Hoshino, Masatoshi Yamamoto, Hiromasa Hosono
    1998 Volume 6 Issue 4 Pages 46-52
    Published: August 01, 1998
    Released on J-STAGE: June 10, 2016
    DOIhttps://doi.org/10.18890/qes.6.4_46
    JOURNAL FREE ACCESS
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    Worm　processing　is　not　a　new　processing　method,　but　it　is　a　high　productivity　process because　there　is　little　material　waste　and　low　energy　consumption.　Worms　are　used　for　the speed　reduction　mechanisms　where　high　precision　is　required.　Since　worms　have　three dimensional　curved　surfaces,　it　is　difficult　to　evaluate　the　quality.　In　this　study,　the　process was　optimized　by　improving　its　generic　function.
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  • Development　of　a　Grease　for　Automobiles
    Ko Hatakeyama
    1998 Volume 6 Issue 4 Pages 53-58
    Published: August 01, 1998
    Released on J-STAGE: June 10, 2016
    DOIhttps://doi.org/10.18890/qes.6.4_53
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    Grease　consists　of　the　base　oil,　thickeners,　and　additives.　Recently,　it　has　been　recognized　that the　quality　of　greases　greatly　affects　the　function　of　component　parts.　The　grease　used　for　a constant　velocity　joint,　which　is　a　component　part　in　automotive　powertrain　systems　needs　to prevent　flaking　by　the　fatigue　of joint　component　parts. Generally,　such　evaluations　are　done　using　durability　tests　with　actual　products.　In　this　study,the　quality　engineering　approach　was　used　for　product　development.　For　the　ideal　function,　it was　considered　that　friction.　should　be　consistent　under　various　usage　conditions.　In　other words,　the　ideal function　follows　the　basic　law　of friction:friction　is　proportional　to　load.　The following　zero-point　proportional　equation　was　used　: y=βM where　y　is　load　and　M　is　fuction. Oscillation,　friction　and　wear　tester　was　used　to　measure　friction.　Frequency,　stroke　and temperature　were　compounded　to　be　the　noise　factor.　Control　factors　such　as　thickener,additive　types　and　the　amount　of　additives　were　assigned　to　an　L18　orthogonal　array. The　optimum　condition　was　determined　with　more　emphasis　on　improving　sensitivity.
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  • Parameter　Design　of　Cooling　system,　experimented　using　paper
    Hideaki Kusano, Katsuhiko Kondo, Takeshi Tamada, Hajime Ootsuki, Toshi ...
    1998 Volume 6 Issue 4 Pages 59-64
    Published: August 01, 1998
    Released on J-STAGE: June 10, 2016
    DOIhttps://doi.org/10.18890/qes.6.4_59
    JOURNAL FREE ACCESS
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    Parameter　Design　of　a　Cooling　System　Using　Paper-made　Components　Utilization　of　falls　for cooling　the　components　in　a　machine　is　the　most　popular　and　inexpensive　method.　In　the designing　of　a　fan,　the　shapes　are　detemined　from　the　results　of　measuring　the　actual　machine temperature. However,　the　method　based　on　the　evaluation　of　temperature　is　usually　costly　and　time consuming. This　fact　inspired　the　idea　of　measuring　"wind".　Right　after　the　idea　of　trying　to　measure wind,　another　new　idea　came　out　to　use　paper　to　make　the　components　for　the　test. By　combining　the　ideas　of　measuring　"wind"　and　using　"paper"　for　the　experiment,　the parameter　design　was　completed　in　a　short　period　of　time　with　little　cost.
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  • Optimization　of　a　Membrane　Welding　Process
    Atsushi Obara, Futoshi Ida, Hiroshi Yano
    1998 Volume 6 Issue 4 Pages 65-69
    Published: August 01, 1998
    Released on J-STAGE: June 10, 2016
    DOIhttps://doi.org/10.18890/qes.6.4_65
    JOURNAL FREE ACCESS
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    In　the　research　and　development　for　a　new　material,　it　is　important　to　evaluate　the　strength under　various　conditions.　A　measuring　device　called　strain　gauge　is　often　used　for　its simplicity. In　the　development　of　the　material　for　gas　turbine　engines,　high　temperature　and　high　pressure are　typical　extreme　environmental　conditions.　Under　such　extreme　conditions,　the conventional　gauge　peels　off,　disconnecting　the　gauge　and　the　lead　wire. In　this　study,　it　was　necessary　to　provide　a　very　thin　film　as　a　connecting　media　between　the strain　gauge　and　the　lead　wire.　For　this　purpose,　"sputtering"　and　"parallel-gap　welding" methods　were　used.　In　order　to　evaluate　the　results,　voltage-current　relationship　was　used　as the　generic　function　instead　of　measuring　strength　the　traditional　quality　characteristic.
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  • Tolerance Design on Movable Window System of Automobile Door
    Kaushlendra Singh, Richard Newton, Carl Zaas, John King
    1998 Volume 6 Issue 4 Pages 70-74
    Published: August 01, 1998
    Released on J-STAGE: June 10, 2016
    DOIhttps://doi.org/10.18890/qes.6.4_70
    JOURNAL FREE ACCESS
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    Since　the　door　window　system　is　repeatedly　used　by　the　vehicle　owner,　it　has　a　great influence　on　his　perception　of　quality.　The　performance　of　the　door　window　system　is dependent　on　manufacturing　and　assembly　variations　in　the　weather-strips,　door　sheet metal,　regulator,　regulator　motor,　glass　etc.　The　Taguchi　Tolerance　Design　of　Experiment was　performed　using　computer　simulation　to　evaluate　window　performance　in　terms　of glass　speed　and　stall　force.　As　a　result　of　this　study,　tolerances　of　component　design parameters　of　the　door　window　system　were　determined　using　percentage　contribution analysis　much　earlier　than　previous　design　practices　would　have　provided.　Also,　Quality Loss　Function　(QLF)　methodology　was　used　to　make　decisions　about　relaxing/tightening tolerances.
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