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Chongqing LiBoMechanical Manufacturing Co.,Ltd

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Chongqing Libo Machinery Manufacturing Co., Ltd. was established in 2000. It mainly produces and manages motorcycle electric starting gear, overrunning clutch, timing sprocket, automobile gear and farming machine gear series products. 

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Tel: 023-62840111 400-023-8292 Fax: 023 62840111 Contacts:Mr. Shen Email:libo_jixie @163.com
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Key technologies for bearing manufacturing
Modernsimulationtechnologyhasdevelopedrapidlywiththewidespreaduseofcomputers.Thespecificmethodofthetechnologyistoinputtheloaddirection,size,lubricationmode,rotationspeedandenvironmentalparametersofthebearingundercertainapplicationconditions,andthemainparametersofthebearingintothecomputeratthesametime,throughcalculation,tounderstandthepossiblelifeofthebearing,andthusevaluatethebearing.Whetherthedesignisuseful.Thistestmethodcangreatlyshortenthetesttime,reducethemanpowerandtestfunds,andcanknowtheapplicationeffectbeforethebearingisnotmanufactured.Itisaquickandworry-freetestmethod.TheresearchofbearingsimulationtesttechnologybySKFandNTNofforeignadvancedbearingindustrycompanieshasreachedadvancedlevel.DomesticandinternationaldevelopmenttrendsAtpresent,therearefourmainbearingtestmethodsathomeandabroad:1.frictionandweartest,second,testbenchtest,third,testroom(testfield)simulationtest,andfourth,actualworkingconditionoperationtest.Foreigncountrieshaveusedtheaboveseveraltestmethods,buttheapplicationpurposeisdifferent.Forexample,todevelopabrandnewproduct,firstly,africtionandweartestmustbeperformed.However,ifthereisnotmuchchangeintheformoffrictionandwear,onlytheproductsizeandloadconditionschange,onlythebench,simulationoractualrunningtestisneeded.Foreigncountrieshaveverystrictassessmentsofnewproducts(suchascarwheelbearings,etc.)inkeyparts,andmustbetestedinactualoperationbeforetheycanbeapprovedforuse.SwedenSKF,JapanNTNrecentlyresearchedbearingsimulationtesttechnology,canonlyreplacebench,simulationorexperiment,toshortenthetimeofproductdesign,speeduptheprogressofproductdevelopment,butthereisstillagapfromtheactualoperation.Atpresent,China'sbearingindustryhascarriedoutfrictionandweartests,onlyoneofLuoyangBearingResearchInstitute;hascarriedoutbearingbenchtest,includingLuoyangBearingResearchInstitute,ShanghaiAxisResearchInstitute,HangzhouBearingTestCenterandWafangdian,Harbin,etc.Yujiaguohasbearingenterprises;LuoyangBearingResearchInstitute,HangzhouBearingTestCenter,Luozhou,Xenxiandotherenterprisescanbelaunchedforsimulationtest.Inordertocarryouttheactualtest,thebearingmanufacturerwillonlycarryouttherequirementswhenthesupportingmainframeenterpriseputsforwardthisaspect,suchasthewheelbearingoftherailwaypassengerwheeltothebearingandthecar.Inshort,thedomesticimplementationofsimulationandactualoperationtestisnotextensive,andshouldfurtherexpandthescopeofthehostortheactualworkingconditions,andpreparesufficientsoftwareandhardwareforthesimulationtesttomentionthescheduleassoonaspossible.MainresearchcontentandobjectivesInordertocarryoutthesimulationtest,itisnecessarytocarryoutbenchorsimulationtestsonsometypicaltypesoftypicalproductstofindthefunctionalrelationshipbetweenlifeandloadandworkingconditions,andthenusethisrelationshiptocarryoutbearingdesignandtestworkthroughcomputer.Thisisusuallyonlyatestforproductsthatareextremelyimportant.AccordingtoChina'sexistingcapabilities,themaingoalforthenexttenyearsistosimulateandtesttherailwayvehiclebearings,automobilewheelbearingsandhigh-speedgrindingspindlebearings,andgraduallyhavecertainsimulationtestconditions.Theresearchcontentsareasfollows:LubricationtechnologyTechnicalsummaryRollingbearingsfailduetotheconstantwearofthebearingsduringthemovement.Thegrease(oil)andthelubricationmethodaredifferent,whichhasdifferenteffectsonreducingthefrictionandwearofthebearings.Therefore,lubricationtechnologyhasbecomeanimportantpartofbearingtechnologyresearch.Somepeoplerefertogrease(oil)asthe"fifthpartofthebearing"(othersareinnerring,outerring,rollingelement,cage).Theresistancetotherotationoftherollingbearingconsistsofrollingfriction,slidingfrictionandlubricantfriction.Rollingfrictionoccurswhentherollingbodiesrollontheraceway;theslidingfrictionoccursontheguidefacesoftherollingbodiesinthecage,ontheribguidefacesofthecageandontherollerendfacesandtheferruleribsintherollerbearings.Thefrictionofthelubricantconsistsoftheinternalfrictionofthelubricantatthecontactandtheagitationandextrusionofthelubricant.Thetotalfrictionofasetofbearings,iethesumofrollingfriction,slidingfrictionandlubricantfriction,istheresistanceoftheimpedancebearingmovement.Thetaskofstudyinglubricationtechnologyistodevelopdifferentgreases(oils)andtheirlubricationmethodstominimizebearingresistanceandlongestlife.DomesticandinternationaldevelopmenttrendsForeignadvancedindustrialcountrieshavecompletelypassedthebearinggrease(oil),technologyandproductionundercommonworkingconditions,andhaveformedaseriesofvarietiesandbatchproductioncapacity.Thecurrentmaintrendistostudytheperformanceofgreaseinsomespecialcases.Forexample,itisbeingstudiedtoimprovethevacuumstability,creepabilityandviscosity-temperatureperformanceofperfluoroethergreaseforaerospace;andsuchaslow-temperaturegrease,althoughithasgoodeffectsinapplication,itslubricationmechanismhasnotbeenwelltheoretical.setforth.Anotherexampleisthestudyoftheuseofgaseouslubricantsathightemperatures(200-4000C).ThecurrentresearchtaskofbearinglubricationinChinaisextremelyimportant.Ifthefundspermit,thefollowingproblemsshouldbesolved:Fir
2019-04-08
Pump bearings and seals are not wear resistant and temperature resistant solutions
(1) Problems occur: the shaft deviation causes high vibration, shortens the life of the mechanical seal, and generates noise.Solution: Use the impeller mouth ring of polyimide carbon fiber composite material to
2019-04-08
Common repair techniques for agricultural machinery parts
(1)Adjustingthetranspositionmethod:thewornpartsareexchangedforoneorientation,andthepartsarenotwornorwornlightly.(2)Repairsizemethod:Thedamagedpartsarerefurbished,thegeometricaldimensionsarechanged,andthecorrespondinglychangedaccessoriesarematchedtoachievethespecifiedmatchingtechnicalparameters.Forexample,ifthecylinderofDongfanghong-75(54)tractorwears,thediameterofthehoningcanbeincreasedby0.25,0.5,0.75,1.0or1.25mmaccordingtotherepairsize,andthecorrespondinglyenlargedpistonandpistonringcanbeused.(3)Additionalpartsmethod:Aspecialpartisassembledtothewornpartoftheparttocompensateforthewearofthepartandrestoreitsoriginalfitrelationship.(4)Replacementpartsandpartialreplacementmethod:Whenthepartsaredamagedandcannotberepairedortherepaircostistoohigh,thenewpartsarereplaced;ifthepartsofthepartsarepartiallydamaged,thedamagedpartscanberemovedandanewonecanberecreated.Inpart,thenewpartisjoinedtothebasepartoftheoriginalpartbyweldingorothermeanstorestoretheworkingabilityofthepart.(5)Recoverysizemethod:restorethedamagedpartstothephysicaldimensionsspecifiedbythetechnicalrequirementsbywelding(electricwelding,gaswelding,brazing),electroplating,spraying,gluing,forging,pressing,car,pliers,heattreatment,etc.Andperformance.Theeconomicbenefitshouldbeconsideredwhenadoptingthismethod.Thecostofrepairingpartsisabout5-50%oftheoriginalprice.Note:Theshapeandpositionaccuracyofthepartcannotbedestroyed;thehardnessandwearresistanceofthepartsurfacecannotbereduced;themetalstructureofthepartbasecannotbechangedandharmfulresidualforceisgenerated,andtheprocessingafterthepartisrepairedcannotbeaffected.
2019-04-08
High and low temperature bearing grease
CaidonGP200-A high and low temperature bearing grease is made of complex soap thickened synthetic base oil, and added a variety of functional additives, with excellent high and low temperature performance, good wear resistance, lubricity and
2019-04-08
Automobile various parts processing technology and tools used
Machining of hole parts
Most of the hole machining of the parts adopts a multi-blade composite type (blade machine clamp, insert welding combination) structure, and the grinding is replaced by reaming and squeezing. In the one-time pass process, the hole is finished, the
2019-04-08
Use and maintenance method for extending the service life of hydraulic piston pump
Theefficiencyofthehydraulicsystemdependsmainlyonthevolumetricefficiencyofthehydraulicpump.Whenthevolumetricefficiencydropsto72%,routinemaintenance,replacementofbearingsandagingsealsarerequired,andfrictionpairsthatexceedthefitclearancearereplacedorrepaired.Getrestored.1.Hydraulicpump:Straight-axisswashplatetypepistonpumpisdividedintotwotypes:self-primingoiltypewithpressuresupplytype.Pressure-supplyhydraulicpumpsmostlyuseagastankwithairpressure,andthehydraulicpumpitselfhasachargepumptosupplypressureoiltothehydraulicpumpinlet.Theself-priminghydraulicpumphasastrongself-primingcapabilityandrequiresnoexternalforcetosupplyoil.Thehydraulicfueltankforpneumaticoilsupplymustoperatethemachineafterthehydraulicpick-uptankhasreachedtheairpressureaftereachstartofthemachine.Ifthepressureofthehydraulicoiltankisinsufficient,itwillcausethemachinetopullofftheslipperywhipinthehydraulicpump,whichwillcauseabnormalwearofthereturningplateandthepressureplateinthepumpbody.Afterusingtheplungerpumpforoilsupplybytheoilpump,after3000hours,theoperatorneedstochecktheplungerpump1-2timesadaytocheckwhetherthesoundofthehydraulicpumpisnormal.Ifthespeedofthehydrauliccylinderisfoundtobedegradedorboring,thechargepumpshouldbedisassembledtocheckwhetherthereisanyscratchontheedgeoftheimpeller,andwhethertheclearanceoftheinternalgearpumpistoolarge.2.Fortheself-primingoiltypeplungerpump,theoilinthehydraulicoiltankshouldnotbelowerthanthelowerlimitoftheoilmark,andasufficientamountofhydraulicoilshouldbemaintained.Thehigherthecleanlinessofthehydraulicfluid,thelongertheservicelifeofthehydraulicpump.3.Themostimportantcomponentofthebearingpistonpumpforhydraulicpumpisthebearing.Ifthereisplayinthebearing,thenormalclearanceofthethreepairsoffrictionpairsinsidethehydraulicpumpcannotbeguaranteed,andthethicknessofthehydrostaticbearingoilfilmofeachfrictionpairisalsodestroyed.Reducethelifeofthepistonpumpbearings.Accordingtotheinformationprovidedbythehydraulicpumpmanufacturer,theaverageservicelifeofthebearingis10000h.Ifthisvalueisexceeded,anewportneedstobereplaced.Thedisassembledbearingcan'tdetecttheclearanceofthebearingwithoutprofessionaltestingequipment.Itcanonlybevisuallytested.Ifitisfoundthattherollersurfacehasscratchesordiscoloration,itmustbereplaced.Whenreplacingthebearing,payattentiontotheoriginalletterandtypeoftheoriginalbearing.Mostofthepistonpumpbearingsuselargeloadcapacitybearings.Itisbesttobuytheoriginalmanufacturerandtheoriginalspecification.Ifyouchangeanotherbrand,youshouldconsultthebearing.Thepersonnelcheckthetabletochange,thepurposeistomaintainthebearing'saccuracylevelandloadcapacity.4.Threepairsoffrictionsub-inspectionandrepair:Accordingtothereplacementstandardoftheplungerpumpparts,theplungerrodandthecylinderholecanberepairedasfollowswhenthevariousgapsofthepartsareoutoftolerance:(1)Ifthecylinderisfittedwithacoppersleeve,itcanberepairedbyreplacingthecoppersleeve.First,thediameterofasetofplungerrodsistrimmedtoauniformsize,andthentheouterdiameterispolishedwithasandpaperof1000#ormore.Threemethodsforinstallingthecoppersleeveinthecylinder:(a)cylinderheatingorcoppersleevelowtemperaturefreezingextrusion,interferenceassembly;(b)miningwithLoctiteadhesiveassembly,thismethodrequirescopperjacketTherearegroovesonthesurfaceofthediameter;(c)tappingofthecylinderbore,theouterdiameterofthecoppersleeveismachined,andafterthecoatingisapplied,theassemblyisscrewedintotheassembly.(2)Thecylinderblockandthecoppersleeveofthefusion-firedcombinationmethodareasfollows:(a)grindingorrepairingthecylinderborebyagrindingrodbyhandormechanicalmeans;(b)re-clampingthecylinderborebyusingacoordinateboringmachine;)Reamingthecylinderborewithareamer.(3)Adopt“surfaceengineeringtechnology”asfollows:(a)electroplatingtechnology:platingalayerofhardchromeonthesurfaceoftheplunger;(b)brushplatingtechnology:brushingthesurfaceoftheplungerwithwear-resistantmaterial;(c)Thermalsprayingorarcsprayingorelectrospraying:sprayinghighcarbonmartensitewearresistantmaterial;(d)laserwelding:weldinghighhardnesswearresistantalloypowderonthesurfaceoftheplunger.
2019-04-08
Study on Causes of Exfoliation of Cylindrical Roller Bearing Outer Ring Raceway
In some conditions of use, rolling bearings often suffer from early damage due to internal or external factors that do not reach their calculated life. Analysis of the early damage of the rolling bearing, in which the bearing outer ring raceway spalling is one of the important factors. Based on the previous experimental results, this
2019-04-08
Bearing installation
Whether the bearing is installed or not will affect the accuracy, life and performance of the bearing. Therefore, please fully study the installation of the bearing, that is, install the bearing in accordance with the operating standards including the following items.
2019-04-08