>> P.31
Ⅱ-23Mounting❺Preloadadjustment・Preloadadjustmentisperformedwithfixingscrewsofthetable-sidewaytightenedtemporarily.・Preloadadjustmentisstartedfromthepreloadadjustingscrewatthecenterofwaylengthandthenbothendsinturn.・Whilemeasuringtheclearanceonthetablesides,tightenthepreloadadjustingscrewssubsequentlyuntildeflectionofthedialgaugestops.Measurethetighteningtorqueforpreloadadjustingscrewsatthispoint.・Whenadjustingpreloadadjustingscrewneareitherend,strokethetablesoftlyandcheckthatthecylindricalrollerisonthepreloadadjustingscrewsection.・Aftertheaboveprocedure,theclearancebecomeszeroorinslightpreloadstate,butpreloadisstillnotadjustedevenly.Withthesameprocedureagain,re-adjustallthepreloadadjustingscrewsevenlytothetorquepreviouslymeasured.Fig.24Exampleofpreloadadjustmentmethod❻Fulltighteningofpreload-adjustment-sideway・Fixingscrewsarelightlytightenedtoeventorque.Aswithpreloadadjustingscrews,temporarilyfixthemtotorquesimilartothespecifiedtorqueinturnfromthewaycentertobothends.・Whentighteningfixingscrewsneareitherend,strokethetablesoftlyandcheckthatthecylindricalrollerisonfixingscrewsection.・Finallywiththesameprocedure,fullytightenallthefixingscrewsevenlytothespecifiedtorque.❼Checkafterassembly・Fullystrokethetablesoftlyandcheckthatrunningissmoothwithoutabnormalnoise.・Measurethetableupperandsidesurfaceswithdialgaugeorthelikeandchecktherunningaccuracy.Fig.25AccuracycheckafterassemblyHigh-accuracymountingofstandardtypeCRWseriesTypicalmountingstructureisshowninFig.26.Formountingatthispoint,generallyfollowtheprocedurebelow.Fig.26MountingexampleofstandardtypeCRWseries❶Preparationformounting・Productsarepackedbyset(4waysand2pairsofrollercages).Becarefulnottomixwithothersets.・Cleaneachpartwithcleanwashfluidandthenapplyrustpreventionandlubricationoil.Tocleanfurther,removetheendscrewfirst.❷Cleanupofmountingsurface・Removeburrsandblemishesonthemachinemountingsurfacewithanoil-stone,etc.Becarefulaboutcornergrooveonthemountingsurface,too.・Wipeoffdustanddirtwithcleanclothandapplyrustpreventionandlubricationoillightly.Fig.27MountingsurfaceFixing-sidewayBed-sidewayBed-sidewayPreloadadjustingscrewPreload-adjustment-sidewayCornergrooveCornergrooveMountingsurfaceCMountingsurfaceAMountingsurfaceAMountingsurfaceAMountingsurfaceAMountingsurfaceBMountingsurfaceBCornergroove
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