
The measuring tools in the mechanical factory are all senior engineers!
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- Time of issue:2020-02-13 10:09
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(Summary description)I.Classificationofmeasuringinstruments Ameasuringdeviceisadevicethathasafixedshapetoreproduceorprovideoneormoreknownquantities.Accordingtodifferentpurposes,themeasuringtoolscanbedividedintothefollowingcategories: 1.Singlevaluemeasuringtool Agagethatcanonlyreflectasinglevalue.Itcanbeusedtocalibrateandadjustothermeasuringinstrumentsordirectlycomparewiththemeasuredobjectasastandardquantity,suchasgaugeblocks,anglegaugeblocks,etc. 2.Multi-valuemeasuringtools Asetofmeasuringtoolsthatcanreflectasetofsimilarmeasurements.Itisalsopossibletocalibrateandadjustothermeasuringinstrumentsordirectlycomparewiththemeasuredasastandardquantity,suchaslineruler. 3.Specialmeasuringtools Agagedesignedtotestaspecificparameter.Thecommononesare:threadgaugesforcheckingthesmoothlimitofsmoothcylindricalholesorshafts,threadgaugesforjudgingthequalificationofinternalorexternalthreads,testtemplatesforjudgingtheconformityofsurfacecontourswithcomplexshapes,andthefunctionofverifyingassemblyaccuracybysimulatingassemblypassabilityGaugesandmore. 4,universalmeasuringtools Inourcountry,themeasuringinstrumentwithrelativelysimplestructureiscalledauniversalmeasuringtool.Suchasverniercalipers,outsidemicrometers,dialindicatorsandsoon. Second,thetechnicalperformanceindicatorsofmeasuringinstruments Nominalvalueofmeasuringtool Thevaluemarkedonthegagetoindicateitscharacteristicsorguideitsuse.Suchasthesizemarkedonthegaugeblock,thesizemarkedontheruler,theanglemarkedontheanglegaugeblock,andsoon. Divisionvalue Onthescaleofthemeasuringinstrument,thedifferencebetweenthemagnitudesrepresentedbytwoadjacentgraticules(thesmallestunitmagnitude).Ifthedifferencebetweenthetworepresentativelinesonamicrometertubewithanouterdiametermicrometeris0.01mm,thegraduationvalueofthemeasuringinstrumentis0.01mm.Thedivisionvalueisthesmallestunitquantitythatcanbereaddirectlybyameasuringinstrument.Itreflectstheaccuracyofthereading,andalsoexplainsthemeasuringaccuracyofthemeasuringinstrument. Measuringrange Withintheallowableuncertainty,therangefromthelowerlimitvaluetotheupperlimitvalueofthemeasuredvaluethatcanbemeasuredbythemeasuringinstrument.Forexample,themeasurementrangeoftheoutsidemicrometeris0-25mm,25-50mm,etc.,andthemeasurementrangeofthemechanicalcomparatoris0-180mm. Measuringforce Duringcontactmeasurement,thecontactpressurebetweenthemeasuringinstrument'sprobeandthesurfacetobemeasured.Toomuchmeasuringforcewillcauseelasticdeformation,andtoolittlemeasuringforcewillaffectcontactstability. 5.Indicationerror Thedifferencebetweentheindicationofthemeasuringinstrumentandthetruevaluebeingmeasured.Theindicationerrorisacomprehensivereflectionofvariouserrorsofthemeasuringinstrumentitself.Therefore,theerroroftheindicatedvalueisdifferentatdifferentoperatingpointswithintheindicatedrangeoftheinstrument.Generally,agaugeblockorothermeasuringstandardwithappropriateaccuracycanbeusedtoverifytheindicationerrorofthemeasuringinstrument. Selectionofmeasurementtools Beforeeachmeasurement,youneedtoselectameasurementtoolaccordingtothespecialcharacteristicsofthepartbeingmeasured.Forexample,calipers,heightgauges,micrometers,anddepthgaugescanbeselectedforlength,width,height,depth,outerdiameter,andstepdifference;micrometerscanbeusedforshaftdiameterCalipers;pluggauges,blockgauges,andfeelergaugescanbeusedforholesandgrooves;usesquaregaugesformeasuringtherightangleofparts;useRgaugesformeasuringRvalues;smallmeasurementtolerances,highaccuracyrequirements,orcalculationofformandpositiontolerancesareavailableThree-dimensionalandtwo-dimensionalelementsareused;ahardnesstesterisusedtomeasurethehardnessofsteel. Caliperapplication Caliperscanmeasuretheinnerdiameter,outerdiameter,length,width,thickness,step,height,anddepthofobjects;calipersarethemostcommonlyusedandmostconvenientmeasuringtools,andthemostfrequentlyusedmeasuringtoolsareusedattheprocessingsite. Digitalcaliper:0.01mmresolution,usedfordimensionalmeasurementwithsmalltolerances(highaccuracy). Tablecard:resolution0.02mm,forregularsizemeasurement. Verniercaliper:Resolution0.02mm,forroughingmeasurement. Beforeusingthecaliper,useacleanwhitepapertoremovethedustanddirt(thewhitepaperisstuckwiththemeasuringsurfaceoutsidethecaliperandthenpulledoutnaturally,repeat2-3times) Whenusingacaliperformeasurement,themeasurementsurfaceofthecalipershouldbeasparallelorperpendiculartothemeasurementsurfaceofthemeasuredobjectaspossible; Whenusingdepthmeasurement,ifthemeasuredobjecthasanRangle,avoidtheRanglebutbeclosetotheRangle,andkeepthedepthruleandthemeasuredheightasverticalaspossible; Whenthecalipermeasuresacylinder,itneedstoberotatedandthemaximumvalueismeasuredinsections; Duetothehighfrequencyofcalipers,maintenanceneedstobedonebest.Afterdailyuse,wipethemcleanandputtheminthebox.Beforeusing,youneedtouseablocktochecktheaccuracyofthecalipers. 2.Applicationofmicrometer Beforeusingthemicrometer,useacleanwhitepapertoremovethedustanddirt.(Usethemicrometertomeasurethecontactsurfaceandthescrewsurfacetojamthewhitepaperandpullitoutnaturally.Repeatfor2-3times.)Thenturntheknobtomeasurethecontact.Whenthesur
The measuring tools in the mechanical factory are all senior engineers!
(Summary description)I.Classificationofmeasuringinstruments Ameasuringdeviceisadevicethathasafixedshapetoreproduceorprovideoneormoreknownquantities.Accordingtodifferentpurposes,themeasuringtoolscanbedividedintothefollowingcategories: 1.Singlevaluemeasuringtool Agagethatcanonlyreflectasinglevalue.Itcanbeusedtocalibrateandadjustothermeasuringinstrumentsordirectlycomparewiththemeasuredobjectasastandardquantity,suchasgaugeblocks,anglegaugeblocks,etc. 2.Multi-valuemeasuringtools Asetofmeasuringtoolsthatcanreflectasetofsimilarmeasurements.Itisalsopossibletocalibrateandadjustothermeasuringinstrumentsordirectlycomparewiththemeasuredasastandardquantity,suchaslineruler. 3.Specialmeasuringtools Agagedesignedtotestaspecificparameter.Thecommononesare:threadgaugesforcheckingthesmoothlimitofsmoothcylindricalholesorshafts,threadgaugesforjudgingthequalificationofinternalorexternalthreads,testtemplatesforjudgingtheconformityofsurfacecontourswithcomplexshapes,andthefunctionofverifyingassemblyaccuracybysimulatingassemblypassabilityGaugesandmore. 4,universalmeasuringtools Inourcountry,themeasuringinstrumentwithrelativelysimplestructureiscalledauniversalmeasuringtool.Suchasverniercalipers,outsidemicrometers,dialindicatorsandsoon. Second,thetechnicalperformanceindicatorsofmeasuringinstruments Nominalvalueofmeasuringtool Thevaluemarkedonthegagetoindicateitscharacteristicsorguideitsuse.Suchasthesizemarkedonthegaugeblock,thesizemarkedontheruler,theanglemarkedontheanglegaugeblock,andsoon. Divisionvalue Onthescaleofthemeasuringinstrument,thedifferencebetweenthemagnitudesrepresentedbytwoadjacentgraticules(thesmallestunitmagnitude).Ifthedifferencebetweenthetworepresentativelinesonamicrometertubewithanouterdiametermicrometeris0.01mm,thegraduationvalueofthemeasuringinstrumentis0.01mm.Thedivisionvalueisthesmallestunitquantitythatcanbereaddirectlybyameasuringinstrument.Itreflectstheaccuracyofthereading,andalsoexplainsthemeasuringaccuracyofthemeasuringinstrument. Measuringrange Withintheallowableuncertainty,therangefromthelowerlimitvaluetotheupperlimitvalueofthemeasuredvaluethatcanbemeasuredbythemeasuringinstrument.Forexample,themeasurementrangeoftheoutsidemicrometeris0-25mm,25-50mm,etc.,andthemeasurementrangeofthemechanicalcomparatoris0-180mm. Measuringforce Duringcontactmeasurement,thecontactpressurebetweenthemeasuringinstrument'sprobeandthesurfacetobemeasured.Toomuchmeasuringforcewillcauseelasticdeformation,andtoolittlemeasuringforcewillaffectcontactstability. 5.Indicationerror Thedifferencebetweentheindicationofthemeasuringinstrumentandthetruevaluebeingmeasured.Theindicationerrorisacomprehensivereflectionofvariouserrorsofthemeasuringinstrumentitself.Therefore,theerroroftheindicatedvalueisdifferentatdifferentoperatingpointswithintheindicatedrangeoftheinstrument.Generally,agaugeblockorothermeasuringstandardwithappropriateaccuracycanbeusedtoverifytheindicationerrorofthemeasuringinstrument. Selectionofmeasurementtools Beforeeachmeasurement,youneedtoselectameasurementtoolaccordingtothespecialcharacteristicsofthepartbeingmeasured.Forexample,calipers,heightgauges,micrometers,anddepthgaugescanbeselectedforlength,width,height,depth,outerdiameter,andstepdifference;micrometerscanbeusedforshaftdiameterCalipers;pluggauges,blockgauges,andfeelergaugescanbeusedforholesandgrooves;usesquaregaugesformeasuringtherightangleofparts;useRgaugesformeasuringRvalues;smallmeasurementtolerances,highaccuracyrequirements,orcalculationofformandpositiontolerancesareavailableThree-dimensionalandtwo-dimensionalelementsareused;ahardnesstesterisusedtomeasurethehardnessofsteel. Caliperapplication Caliperscanmeasuretheinnerdiameter,outerdiameter,length,width,thickness,step,height,anddepthofobjects;calipersarethemostcommonlyusedandmostconvenientmeasuringtools,andthemostfrequentlyusedmeasuringtoolsareusedattheprocessingsite. Digitalcaliper:0.01mmresolution,usedfordimensionalmeasurementwithsmalltolerances(highaccuracy). Tablecard:resolution0.02mm,forregularsizemeasurement. Verniercaliper:Resolution0.02mm,forroughingmeasurement. Beforeusingthecaliper,useacleanwhitepapertoremovethedustanddirt(thewhitepaperisstuckwiththemeasuringsurfaceoutsidethecaliperandthenpulledoutnaturally,repeat2-3times) Whenusingacaliperformeasurement,themeasurementsurfaceofthecalipershouldbeasparallelorperpendiculartothemeasurementsurfaceofthemeasuredobjectaspossible; Whenusingdepthmeasurement,ifthemeasuredobjecthasanRangle,avoidtheRanglebutbeclosetotheRangle,andkeepthedepthruleandthemeasuredheightasverticalaspossible; Whenthecalipermeasuresacylinder,itneedstoberotatedandthemaximumvalueismeasuredinsections; Duetothehighfrequencyofcalipers,maintenanceneedstobedonebest.Afterdailyuse,wipethemcleanandputtheminthebox.Beforeusing,youneedtouseablocktochecktheaccuracyofthecalipers. 2.Applicationofmicrometer Beforeusingthemicrometer,useacleanwhitepapertoremovethedustanddirt.(Usethemicrometertomeasurethecontactsurfaceandthescrewsurfacetojamthewhitepaperandpullitoutnaturally.Repeatfor2-3times.)Thenturntheknobtomeasurethecontact.Whenthesur
- Categories:Industry news
- Author:
- Origin:
- Time of issue:2020-02-13 10:09
- Views:
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