使用灰關聯分析線切割加工多功能之最佳化分析

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1、修平㈻報　第㈩㆔期　民國㈨㈩㈤年㈨㈪HSIUPINGJOURNAL.VOL.13,pp.181-198(September2006)181使用灰關聯分析線切割加工多㊠功能之最佳化分析張福平、江可達摘要本文以灰關聯分析處理放電線切割之工件加工，製程中有關多重品質特性之調整影響因素，以求得最佳化參數。多重品質特性包含切削移除率(cuttingremovalrate)，表面粗糙度(surfaceroughness)與成型尺寸精確度(thedimensionalaccuracyofform)。運用兩種不同圓弧半徑之圓弧加工，使用放電時間(ON)，休止時間(OFF)，短路放電(AN)，短路休止時間(

2、AFF)，伺服參考電壓(SV)，線進給(WF)，水流大小WL等七種之加工參數。由表可知，對每一種不同水平值，使用灰關聯度分析，選擇不同之最佳化值，由實驗結果可得較佳之加工參數。由變異變數分析(ANOVA)驗證，減少分析試驗模型時程與材料浪費，並提升製成品質與降低生產成本。關鍵詞︰放電線切割加工；灰關聯分析；性能特性。張福平：修平技術學院機械工程系講師江可達：修平技術學院機械工程系副教授投稿日期：950331　接受刊登日期：950425182修平㈻報　第㈩㆔期　民國㈨㈩㈤年㈨㈪Useofgreyrelationalanalysistooptimizethewireelectricaldisc

3、hargemachiningprocesswithmultipleperformancecharacteristicsKo-TaChiang,Fu-PingChangAbstractThispaperpresentsaninvestigationontheselectmodelofoptimalcontrolparametersforthewireelectricdischargemachining(WDEM)processwithmultipleperformancecharacteristicsbasedonthegreyrelationalanalysis.Themultiplepe

4、rformancecharacteristicsinWDEMprocessincludethecuttingremovalrate,theprocessingsurfaceroughnessandthedimensionalaccuracyofform.Therearetwotypeofarchmachiningpathfordeterminingthedimensionalaccuracyofthefinishedpart.Inthisstudythevariousmachiningparameter,suchastheontimeofdischarging(ON),theofftime

5、ofdischarging(OFF),thearcontimeofdischarging(AN),thearcofftimeofdischarging(AFF),theservovoltage(SV),thewirefeed(WF)andthewaterflow(WL)wereconsidered.Theresponsetableandtheresponsegraphforeachlevelofthemachiningparametersareobtainedfromthegreyrelationalgrade,andselecttheoptimallevelsofmachiningpar

6、ameters.ExperimentalresultshaveobviouslyshownthattheaboveperformancecharacteristicsintheWEDMprocesscanbegreatlyimprovedtogether.Usingtheanalysisofvariance(ANOVA),thenoticeableandunnoticeablevariablefactorsareeffectivelyrecognizedtodecreasingtry-errortimeandconsumingcostinthestateofincreasingqualit

7、yandreduceproductioncosts.Keywords:wireelectricdischargemachining;greyrelationalanalysis;performancecharacteristic.Fu-PingChang,AssociateProfessor,DepartmentofMechanicalEngineeringHIT.Ko-TaChiang,Instructor,Depar