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龍口金正機械

The company has a total investment of 350 million yuan, a fixed assets of 150 million yuan, covering an area of 100,000 square meters, and a construction   area of 80,000 square meters. Jinzheng Machinery is a professional manufacturer of automobile brake discs, brake hubs, water pumps, oil pumps, air pumps and other components, which integrates development, casting, processing and marketing. It has invested 10 million yuan in the design and development of ABS brake discs, brake hubs and other products in accordance with the market demand. The company has more than 2000 product models, mainly exported. America, Europe, Korea, Japan, Canada, South Africa, Western Europe, Taiwan and other countries and regions.

龍口金正機械

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       公(gōng)司擁有(yǒu)專業技(jì )術隊伍，配備先進的計算機輔助設計、輔助制造設施和軟件，擁有(yǒu)先進生産(chǎn)、檢測設備410餘台,其中(zhōng)高精(jīng)度自動化生産(chǎn)設備350餘台。

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Events

Establishment, Development, Rapid Development and Strategic Reorganization

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Plant and equipment

The company has a total investment of 350 million yuan, a fixed assets of 150 million yuan, 1500 employees, covering an area of 100,000 square meters, and a construction area of 80,000 square meters.

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Product

According to the market demand, we have invested 10 million yuan to design and develop ABS brake disc, brake hub and other products. Our products have reached more than 2000 types.

Welcome to Longkou Jinzheng Machinery Co., Ltd.
Welcome to Longkou Jinzheng Machinery Co., Ltd.
Welcome to Longkou Jinzheng Machinery Co., Ltd.
Time of issue : 2019-08-20 18:11:00
LongkouJinzhengMachineryCo.,Ltd.wasestablishedinthebeautifulcoastalcityofEasternChina,Longkou,formerlyknownasLongkouZhengzhuangFoundryFactory.ItwasfoundedinSeptember1993.InJuly2002,itjointlyestablishedLongkouJinzhengMachineryCo.,Ltd.withSouthKorea.Itis10kilometersfromLongkouPort,80kilometersfromYantaiPort,andislocatedinQingdao,NorthandDaThecompanyisfacingeachotheracrossthesea,withconvenienttransportationanduniquegeographicalconditions,whichprovideabroadprospectfordevelopment.
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LongkouJinzhengMachineryCo.,Ltd.wasestablishedinthebeautifulcoastalcityofEasternChina,Longkou,formerlyknownasLongkouZhengzhuangFoundryFactory.ItwasfoundedinSeptember1993.InJuly2002,itjointlyestablishedLongkouJinzhengMachineryCo.,Ltd.withSouthKorea.Itis10kilometersfromLongkouPort,80kilometersfromYantaiPort,andislocatedinQingdao,NorthandDaThecompanyisfacingeachotheracrossthesea,withconvenienttransportationanduniquegeographicalconditions,whichprovideabroadprospectfordevelopment.
Kim Jong-un warmly invites friends from home and abroad to come to our company for negotiation and guidance.
Kim Jong-un warmly invites friends from home and abroad to come to our company for negotiation and guidance.
Time of issue : 2019-08-21 08:39:00
Unity,pragmatism,innovation,development,pursuitofnever-stop,customersareaboveeverything,withscienceandtechnologyandhumanresourcesasthecoredrivingforceandinternaldrivingforce,withthedevelopmentofnewproductsandmarketingasthedrivingforce,andstrivetocreatewell-knowndomesticenterprises.Wearewillingtoestablishequalandmutuallybeneficialcooperativerelationshipwithdomesticandforeigncustomerswithhighqualityproductsandfrankmind,jointlyexploretheroadofdevelopmentofautomotivepartsmanufacturingindustryinthenewcentury,andpursueexcellenceandendlessness.KimJong-unwarmlyinvitesfriendsfromhomeandabroadtonegotiateandguidethecompany.
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Unity,pragmatism,innovation,development,pursuitofnever-stop,customersareaboveeverything,withscienceandtechnologyandhumanresourcesasthecoredrivingforceandinternaldrivingforce,withthedevelopmentofnewproductsandmarketingasthedrivingforce,andstrivetocreatewell-knowndomesticenterprises.Wearewillingtoestablishequalandmutuallybeneficialcooperativerelationshipwithdomesticandforeigncustomerswithhighqualityproductsandfrankmind,jointlyexploretheroadofdevelopmentofautomotivepartsmanufacturingindustryinthenewcentury,andpursueexcellenceandendlessness.KimJong-unwarmlyinvitesfriendsfromhomeandabroadtonegotiateandguidethecompany.
How to Maintain Brake Disc
How to Maintain Brake Disc
Time of issue : 2019-08-21 08:37:00
Ownerswhousuallyliketomaintaintheircarsmayneglectthemaintenanceofbrakediscs.Manyfriendsmaycallthemselvesolddrivers,buttheyprobablydon'tknowmuchaboutbrakediscs.Todaywearegoingtotalkabouthowtomaintainthebrakedisc:thebrakepadsneedtobereplacedwhentheyarebetween30,000and40,000miles,thebrakediscsneedtobereplacedwhentheyareleftto70,000miles,andthebrakepadsneedtobereplacedwhentheyareusedforarelativelyshorttime.Ingeneral,thebrakediscsarereplacedaftertworeplacements,andtherearbrakesneedtobereplacedbetween80,000and100,000miles.Toreplacethebrakeoil,thebrakeoilhaswaterabsorption.Ifthebrakeoilischangedfromtimetotime,themoisturecontentofairwillbeabsorbedinthebrakeoilandthemoisturecontentwillbeincreased.Whenthemoisturecontentreachesacertainconcentration,thehightemperatureproducedbybrakingwillmakebrakeoilboilandproducebubbles.
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Ownerswhousuallyliketomaintaintheircarsmayneglectthemaintenanceofbrakediscs.Manyfriendsmaycallthemselvesolddrivers,buttheyprobablydon'tknowmuchaboutbrakediscs.Todaywearegoingtotalkabouthowtomaintainthebrakedisc:thebrakepadsneedtobereplacedwhentheyarebetween30,000and40,000miles,thebrakediscsneedtobereplacedwhentheyareleftto70,000miles,andthebrakepadsneedtobereplacedwhentheyareusedforarelativelyshorttime.Ingeneral,thebrakediscsarereplacedaftertworeplacements,andtherearbrakesneedtobereplacedbetween80,000and100,000miles.Toreplacethebrakeoil,thebrakeoilhaswaterabsorption.Ifthebrakeoilischangedfromtimetotime,themoisturecontentofairwillbeabsorbedinthebrakeoilandthemoisturecontentwillbeincreased.Whenthemoisturecontentreachesacertainconcentration,thehightemperatureproducedbybrakingwillmakebrakeoilboilandproducebubbles.
Basic knowledge of brake discs
Basic knowledge of brake discs
Basic knowledge of brake discs
Time of issue : 2019-08-21 08:42:00
Brakesarenowdiscbrakesanddrumbrakes,andmanyoftheoldercarsarefrontandreardrums.Nowadays,manycarsarediscbrakedbothfrontandrear.Becausethediscbrakehasbetterheatdissipationthanthedrumbrake,itisnoteasytoproducethermalrecessionundertheconditionofhigh-speedbraking,soitshigh-speedbrakingeffectisgood.Theprincipleofthebrakediscisthatthemainsourceofthebrakeisfriction.Byusingthefrictionbetweenthebrakepadandthebrakedisc(drum)andthetireandtheground,thekineticenergyofthevehiclemovingisconvertedintotheheatenergyafterfriction,andthecarstops.Agoodbrakingsystemcanprovidestable,sufficientandcontrollablebrakingforce,andhasgoodhydraulictransmissionandheatdissipationabilitytoensurethattheforceappliedbythedriverfromthebrakepedalcanbefullyandeffectivelytransmittedtothemainandsub-pumps,andtoavoidhydraulicfailureandbrakingdeteriorationcausedbyhighheat.Materialdeterminesthelevelofbrakingandwearrate,likethebrand-newsharpmajorityofcarownersreflecttheabnormalbrakingnoiseisbecauseofthematerialoftherearbrakepad,afterreplacingtheimportedbrakepad,theproblemissolved.Incaseofexcessivewearandthinningofthebrakepads,itisnecessarytoreplacethemintimesoasnottocausedirectcontactbetweenthesteelplateandthebrakedisc,resultinginlossofbrakingeffectanddamageofthebrakedisc.Thebrakedisc,whichisactedbythebrakepadandrotateswiththetire,iscalledthebrakedisc.Usually,theownercanjudgethebrakediscbythesoundofdailybrake,especiallywhenthevehiclehasbeenusedforalongtime,itcanalsobeusedtojudge,forexample,whenthebrakepadrubsagainstthebrakediscfilamentorloudsound,ifthissituationisfound,youcantrytwicemoretopreventitfromoccurring.Whenthebrakepadsarerunninginandoutatthebeginningofinstallation,theheatrecessionofthebrakediscislow,therecoveryperformanceisgood,andthebrakingperformanceofmountainroadsandhigh-temperatureandhigh-speedconditionsisnotreduced.Toacertainextent,itimprovesthesafetyofvehicles.Itisverysuitableformountainroadarea,highwayandotherroadconditions!
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Brakesarenowdiscbrakesanddrumbrakes,andmanyoftheoldercarsarefrontandreardrums.Nowadays,manycarsarediscbrakedbothfrontandrear.Becausethediscbrakehasbetterheatdissipationthanthedrumbrake,itisnoteasytoproducethermalrecessionundertheconditionofhigh-speedbraking,soitshigh-speedbrakingeffectisgood.Theprincipleofthebrakediscisthatthemainsourceofthebrakeisfriction.Byusingthefrictionbetweenthebrakepadandthebrakedisc(drum)andthetireandtheground,thekineticenergyofthevehiclemovingisconvertedintotheheatenergyafterfriction,andthecarstops.Agoodbrakingsystemcanprovidestable,sufficientandcontrollablebrakingforce,andhasgoodhydraulictransmissionandheatdissipationabilitytoensurethattheforceappliedbythedriverfromthebrakepedalcanbefullyandeffectivelytransmittedtothemainandsub-pumps,andtoavoidhydraulicfailureandbrakingdeteriorationcausedbyhighheat.Materialdeterminesthelevelofbrakingandwearrate,likethebrand-newsharpmajorityofcarownersreflecttheabnormalbrakingnoiseisbecauseofthematerialoftherearbrakepad,afterreplacingtheimportedbrakepad,theproblemissolved.Incaseofexcessivewearandthinningofthebrakepads,itisnecessarytoreplacethemintimesoasnottocausedirectcontactbetweenthesteelplateandthebrakedisc,resultinginlossofbrakingeffectanddamageofthebrakedisc.Thebrakedisc,whichisactedbythebrakepadandrotateswiththetire,iscalledthebrakedisc.Usually,theownercanjudgethebrakediscbythesoundofdailybrake,especiallywhenthevehiclehasbeenusedforalongtime,itcanalsobeusedtojudge,forexample,whenthebrakepadrubsagainstthebrakediscfilamentorloudsound,ifthissituationisfound,youcantrytwicemoretopreventitfromoccurring.Whenthebrakepadsarerunninginandoutatthebeginningofinstallation,theheatrecessionofthebrakediscislow,therecoveryperformanceisgood,andthebrakingperformanceofmountainroadsandhigh-temperatureandhigh-speedconditionsisnotreduced.Toacertainextent,itimprovesthesafetyofvehicles.Itisverysuitableformountainroadarea,highwayandotherroadconditions!
Causes of Brake Drum Cracking
Causes of Brake Drum Cracking
Causes of Brake Drum Cracking
Time of issue : 2019-08-21 08:40:00
Brakedrumisalsocalledbrakepot.Brakedrumisakeypartinthebrakesystemofautomobiles.Thequalityofbrakedrumdirectlydeterminestheeffectofself-braking,andevenrelatestothesafetyofdriving.Therefore,itisveryimportanttoselectaqualifiedbrakedrumforautomobiles.Belowisasmallbraidtoletyouknowwhatcausesthebrakedrumcracking?Duringthebrakingprocess,becauseofdryfrictionandhighfrictionforce,thebrakedrumoftenbecomesoverheatedandreddened.Atthistime,workersoftenpourtapwateronthebrakedrumtoreduceitstemperature.Thebrakedrumrubscontinuouslyandintenselytoproduceheat,whichmakesitssurfacetemperaturerise.Usingtapwatertoreducethetemperatureofbrakedrumhasplayedaroleinquenching,whichincreasesthelocalhardnessofthesurface,internalstressandcoldbrittleness.Atthesametime,duetotherepeatedactionoftangentialforce,localcrackinitiationoccursatthesurfacelayerofmassivecarbidesandinclusions.Withtheeffectofirregularalternatingimpactforce,thecrackpropagationisaccelerated.
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Brakedrumisalsocalledbrakepot.Brakedrumisakeypartinthebrakesystemofautomobiles.Thequalityofbrakedrumdirectlydeterminestheeffectofself-braking,andevenrelatestothesafetyofdriving.Therefore,itisveryimportanttoselectaqualifiedbrakedrumforautomobiles.Belowisasmallbraidtoletyouknowwhatcausesthebrakedrumcracking?Duringthebrakingprocess,becauseofdryfrictionandhighfrictionforce,thebrakedrumoftenbecomesoverheatedandreddened.Atthistime,workersoftenpourtapwateronthebrakedrumtoreduceitstemperature.Thebrakedrumrubscontinuouslyandintenselytoproduceheat,whichmakesitssurfacetemperaturerise.Usingtapwatertoreducethetemperatureofbrakedrumhasplayedaroleinquenching,whichincreasesthelocalhardnessofthesurface,internalstressandcoldbrittleness.Atthesametime,duetotherepeatedactionoftangentialforce,localcrackinitiationoccursatthesurfacelayerofmassivecarbidesandinclusions.Withtheeffectofirregularalternatingimpactforce,thecrackpropagationisaccelerated.
Why does the brake drum fail in operation?
Why does the brake drum fail in operation?
Why does the brake drum fail in operation?
Time of issue : 2019-08-21 08:41:00
Intheuseofautomobilebrakedrum,ifthefailureofbrakedrumoccurs,itwillbringusdanger.Whatcausesthefailureofbrakedruminoperation?Nowlet'sgettoknowitwithXiaobian.Samplingandanalysisoffailurebrakedrum(includinglongitudinalcracking,creepcrackingandhardspotbrakedrum),theworkingenvironmentofbrakedrumisrelativelybad,undertheimpactthermalstresscausedbyfrequentbraking(sentencebrakingisequivalenttoimpactthermalstress),inonecase,therateofheatingorcoolingisgreaterthan93ortherateofheatingandcoolingisfastandHeatingissmallanduniform,andheatshockoccurswhentemperaturecrossesover102incastings.Becausethebrakedrumheatdissipationconditionsaresmall,leadingtotemperaturerise.Whenthetemperaturereachesabout730C,ifthestabilityofpearliteissmall,itwilldecompose,volumewillexpandandcausephasechangestress.Ifthepeakvalueofthesuperpositionofthediurnalstressandthermalstressexceedsthethermalfatiguestress,thermalfatiguecrackingwilloccur.Similarly,ifthethermalfatiguestressexceedsthethermalfatiguestress,thermalfatiguecrackingwilloccur.Atthistime,theenvironmentalhistoryisbadorthethermalconditionispoor,andthetemperaturerisesabovetheeutectoidtransformationtemperaturetoformaustenite.Understrongcoldconditions,suchaswatercoolingorstrongwindcooling,hardeningphasessuchasmartensite,bainiteorsorbitewillbeformed.Thisiswhythefailurebrakedrumcracksandformshardspotsonthesurfaceatthesametime.Because.
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Intheuseofautomobilebrakedrum,ifthefailureofbrakedrumoccurs,itwillbringusdanger.Whatcausesthefailureofbrakedruminoperation?Nowlet'sgettoknowitwithXiaobian.Samplingandanalysisoffailurebrakedrum(includinglongitudinalcracking,creepcrackingandhardspotbrakedrum),theworkingenvironmentofbrakedrumisrelativelybad,undertheimpactthermalstresscausedbyfrequentbraking(sentencebrakingisequivalenttoimpactthermalstress),inonecase,therateofheatingorcoolingisgreaterthan93ortherateofheatingandcoolingisfastandHeatingissmallanduniform,andheatshockoccurswhentemperaturecrossesover102incastings.Becausethebrakedrumheatdissipationconditionsaresmall,leadingtotemperaturerise.Whenthetemperaturereachesabout730C,ifthestabilityofpearliteissmall,itwilldecompose,volumewillexpandandcausephasechangestress.Ifthepeakvalueofthesuperpositionofthediurnalstressandthermalstressexceedsthethermalfatiguestress,thermalfatiguecrackingwilloccur.Similarly,ifthethermalfatiguestressexceedsthethermalfatiguestress,thermalfatiguecrackingwilloccur.Atthistime,theenvironmentalhistoryisbadorthethermalconditionispoor,andthetemperaturerisesabovetheeutectoidtransformationtemperaturetoformaustenite.Understrongcoldconditions,suchaswatercoolingorstrongwindcooling,hardeningphasessuchasmartensite,bainiteorsorbitewillbeformed.Thisiswhythefailurebrakedrumcracksandformshardspotsonthesurfaceatthesametime.Because.

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