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Professional Welding Equipment Manufacturer

HG-76 type straight seam welded pipe unit
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HG-76 type straight seam welded pipe unit
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HG-25 high frequency straight seam welded pipe unit
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HG-25 high frequency straight seam welded pipe unit
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HG-16 type straight seam welded pipe unit
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HG-16 type straight seam welded pipe unit
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HG-32 high frequency straight seam welded pipe unit
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HG-32 high frequency straight seam welded pipe unit
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HG-45 high frequency straight seam welded pipe unit
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HG-45 high frequency straight seam welded pipe unit
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HG50 76 Series tube mill line
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HG50 76 Series tube mill line
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HG-114 type straight seam welded pipe unit
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HG-114 type straight seam welded pipe unit
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HG-165 type straight seam welded pipe unit
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HG-165 type straight seam welded pipe unit
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Pioneering & Innovative, Dedicated Service

Solve the problems of equipment selection, professional production, and peace of mind after sales

Professional manufacturer

IMG

The company is a professional manufacturer of precision high-frequency welded pipe units, stainless steel precision welded pipe units, supporting pipe molds and slitting units.

Rich manufacturing experience

IMG

The company adheres to the principle of reliable quality and customer first, while drawing on the excellent manufacturing experience of foreign counterparts in the same industry, constantly innovating and forging ahead.

Wide application area

IMG

The company's products are widely used in welded pipe manufacturing industry, sporting goods, fitness equipment, medical equipment, children's products, furniture appliances, vehicles and other industries.

Focus on service

IMG

We have a passionate team to ensure that the company can effectively provide professional pre-sales and after-sales service to customers.

东仑工业

Professional / Innovation / Integrity / Aggressive

Donglun Industrial Professional Welded Pipe Equipment Manufacturer

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About us

Yangzhou Donglun Industrial Equipment Co.,Ltd.

Yangzhou Donglun Industrial Equipment Co., Ltd. is a professional manufacturer of precision high-frequency welded pipe units, stainless steel precision welded pipe units, supporting pipe molds and slitting units. The company adheres to the principles of reliable quality and customer first, while drawing on the excellent foreign counterparts in the same industry ...

The company's products are widely used in welded pipe manufacturing industry, sporting goods, fitness equipment, medical equipment, children's products, furniture appliances, vehicles, shipbuilding...

Case Show

Shanghai exhibition
Shanghai exhibition
Shanghai exhibition
Details 白箭头 黑箭头
Turkish customers
Turkish customers
Turkish customers
Details 白箭头 黑箭头
Vietnam equipment
Vietnam equipment
Vietnam equipment
Details 白箭头 黑箭头

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Matters

Matters needing attention in the production of welded pipe equipment

1.First,theelongationofthepipeislongerthanthatofmanualwelding.Generally,4-5mmisbetter.Ifitistoolong,itwillreducetheweldpenetrationandtheweldisnotbeautiful;ifitistooshort,itwillcauseundercutsanddamagetothenozzle.Andotherdefects. 2.Secondly,thecleanlinessofthepipeandtubesheetofthepipeweldingequipmentishigher.Thetubesheetisbestcleanedwithlyeororganicsolution. 3.Theappearanceoftheweldingworkpieceisnotclean,andairholeswillappearduringwelding,whichwillaffecttheweldingquality. 4.Thepipebevelshouldnotbetoolarge,thegeneralchamferis≤2mm,andthebestis1mm.Ifthebevelistoolarge,itiseasytoburnthepipe,andifitistoosmall,itwillcauseinsufficientpenetration.    YangzhouDonglunIndustrialEquipmentCo.,Ltd.isaprofessionalmanufacturerspecializingintheproductionofvariousspecificationsofhigh-frequencyweldedpipeequipment,slittingunits,Kaipingunits,andcoldrollingmetallurgyequipment.
2020-03-13
Butt

Butt welding method of pipe welding equipment

Thebuttweldingprocessofthepipeweldingunitincludesunwinding,pinching,straightening,shearing,guiding,buttwelding,looper,butt,etc.Theprocesscanbesaidtobecomplicatedandchangeable.Ourcompanywilltellyouaboutthepipeweldingequipmentfirst.Thefirstthreestepsofthebuttweldingprocess: 1.Afterthecoilisproperlypositioned,theleftandrightconeheadsoftheunwindercanbeinsertedintothesteelcoilandrotatedatthesametime,andthebeltheadissenttotheniproller.Insitu. 2.Inordertoallowthespringsteelbelttobeaccuratelycentered,theunwindercanmoveasawholeaxially+150mmbeforerunning.Aftertheunwinderisstarted,thestrippassesthepinchrollertothelevelerequippedwithadustremovaldevice. 3.Thestraightenedspringsteelstripusesaslidinghydraulicsheartocuttheheadandtailofthestrip.Inaspecialaggregateboxontheoutside).YangzhouDonglunIndustrialEquipmentCo.,Ltd.isaprofessionalmanufacturerspecializingintheproductionofvariousspecificationsofhigh-frequencyweldedpipeequipment,slittingunits,Kaipingunits,andcoldrollingmetallurgyequipment.
2020-03-13
The

The role of leveler in welded pipe unit

Thelevelingmachine'sroleinthepipeweldingunitistocorrect,shape,etc.Itwillnormallybeusedintheearlystageoftheproductionofthepipeweldingunit.Therearefiveorthreetypesofstriplevelersrecommendedforcold-formedsteel:roller,seven-roll,andnine-roll.Mostoftheopen-rolledcold-formedsteelisafive-rollertype,andtheclosed-endcold-formedsteelismostlyaseven-rollertype.Five-orseven-rollerlevelingmachinesarenormallyusedonsmallandmedium-sizedpipeweldingunits.Somepipeweldingunitsusingthinsteelstripscanbeprovidedwithoutlevelingmachines.Canalsoquicklytransportthesteelbelttothelooperforstorage.Ofcourse,theelasticandplasticstriplevelerthatisrepeatedlysubjectedtorollingisallrollertype.Thestripisleveledbybendingbetweenthetworowsofrollersoftherollerleveler.Themorethenumberofrepeatedbendingcycles,themorethelevelingprocesswillThesmootheritis,thehigherthelevelingquality.Thelevelingmachineisstillabitcomplicatedtooperate.Whenusingit,youmayencountersuchproblemsorproblems.Inthiscase,whatadjustmentoperationsdoweneedtodo:常见Whentherollersofcommonlevelingmachinesareworn,thatis,whenthepressureisstilltoohigh,therollersmustbechanged.Thisisoftenencountered!时Whentheunevennessiswavyatthesametime,weneedtoimmediatelyadjustthepressureonthearchwayandincreasethepressureontheentireupperroller.Ofcourse,whenadjusting,wemustpayattentiontosafety!Thebackendoftheflatteningmachinecomingoutofthesteelbeltisbentdownbecausethepositionofthelowerrollerattheexitendistoolow,whichcanbeproperlyraised;Theendoftheleveler'ssteelbeltisbentupwardbecausethepressureoftheupperrolleristoolarge,andthelowerrolleroftheoutletcanbeadjustedtoreducethepressure;Afterusingthelevelerforalongtime,thesteelbeltwillhavedefectssuchasfolding,twisting,curling,andlargesicklebends.Whenthelevelerisstuck,itwillbenecessarytooperatethehydrauliccylindertolifttheupperarchway.Itisrecommendedtocorrectthedefect.Afterpassing,theupperarchwayispressed,sothatitcanbecutoffunderthedefectivesteelstrip.Thelevelercannotpassthroughtwolayersofsteelstrip.YangzhouDonglunIndustrialEquipmentCo.,Ltd.isaprofessionalmanufacturerspecializingintheproductionofvariousspecificationsofhigh-frequencyweldedpipeequipment,slittingunits,Kaipingunits,andcoldrollingmetallurgyequipment.Usersarewelcometocometoconsult.
2020-03-13
Application

Application of pipe welding machine

Consumptionoilcasingcanbeweldedintwoways:hot-rolledseamlesssteelpipeandweldedpipeunit.Becausethereisaweldingseamintheoilcasingusedforwelding,itisthekeyofconsumptiontodealwiththematchingofthestrengthandtoughnessofthebasemetalandtheweldingseam,thegrayspotoftheweldingseam,andthecorrosionoftheweldingseam.  TheperformancecharacteristicsofthepipeweldingmachinearethatthemoldisprocessedbyaCNCsystem,whichiswear-resistantandhighlyaccurate.Thesquaretubehasaflatmoldingsurfaceandasharpangle.Thepolishedsurfacecanreachthemirrorsurface,andtheroundnessoftheshapeandpositiontoleranceiswithin5mm;thediagonalofthesquaretubedoesnotexceed±0.5mm.  Theconsumptionoilcasingoftheweldedpipeunitisaffectedbythetoughnessofthebasemetal,thechemicalcompositionofthebasemetalandtheweldingprocess.WhentheC,S,P,andCrelementsintherawstriparereduced,thetoughnessoftheweldcanbeimproved;whenthebrightlinewidth,streamlineangleandthecontentofnon-metallicinclusionsintheweldingprocessarecontrolled,Itcansignificantlyimprovethetoughnessoftheweld.Inaddition,thecontrolledcoolingoftheweldedpipeafterreducingthethermaltensioncanimprovethetoughnessoftheweldseamoftheweldingoilcasingandotherareasofthepipebody.  Weldedpipecanusethreekindsofhardnesstestmethods:cloth,LuoandWei,tomeasureHB,HRB(orHRC)andHVhardnessvalue,onlyoneofthethreehardnessvalues​​canbemeasured.Thecompany'snewlydevelopedportableappearanceRockwellhardnesstesterandpipeRockwellhardnesstestercanstopfastandaccuratehardnesstesting,makingitdifficulttosolveproblemsthatweredifficulttohandleinthepastinChina.
2020-03-13

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Add:The Industrial Park of Yangshou Town, Yangzhou City, Jiangsu Province

Mobile Phone:13405550777 18151068988

Fax:0514-82222285

E-mail:854186350@qq.com

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Copyright:Yangzhou Donglun Industrial Equipment Co.,Ltd.   苏ICP备20013601号-1   Power by:www.300.cn

Copyright:Yangzhou Donglun Industrial Equipment Co.,Ltd. 

苏ICP备20013601号-1    Power by:www.300.cn