Sight seam simbi pombi inyere yesimbi ine welded seam inofambirana nelongitudinal direction yepombi yesimbi. Kazhinji yakakamurwa kuva metric yemagetsi welded simbi mapaipi, yemagetsi welded dzakaonda-rusvingo mapaipi, transformer kutonhora mafuta pombi, etc. Production muitiro Straight musono mukuru-frequency welded simbi pombi vane unhu hunenge nyore muitiro uye nokukurumidza kuramba kugadzirwa. Iwo anoshandiswa zvakanyanya mukuvaka kwevagari, petrochemical, mwenje indasitiri, uye mamwe madhipatimendi. Inonyanya kushandiswa kutakura yakaderera-pressure fluid kana kugadzirwa kuita akasiyana einjiniya zvikamu uye chiedza maindasitiri zvigadzirwa..

1. Production muitiro kuyerera yakatwasuka musono high frequency welded simbi pombi

Sight seam welded steel pombi inogadzirwa nekumoneredza tambo refu yesimbi yeimwe yakatarwa kuita denderedzwa chubhu chimiro kuburikidza nepamusoro-frequency welding unit uye nekumoneredza seam yakatwasuka kuita pombi yesimbi. Chimiro chepombi yesimbi inogona kutenderera, yakaenzana, kana yakasarudzika-yakaumbwa, zvinoenderana nekukura uye kukunguruka mushure mekucheka. Zvinhu zvikuru zve welded simbi pombi ishoma kabhoni simbi uye yakaderera alloy simbi kana zvimwe zvinhu simbi nazvoσs≤300N/mm2, uyeσs≤500N/mm2..

2. High-frequency welding

High-frequency welding yakavakirwa pamusimboti we electromagnetic induction uye ganda mhedzisiro, pedo nemhedzisiro, uye eddy yazvino yekupisa mhedzisiro yeAC charges muconductor kuitira kuti simbi iri kumucheto kweweld ichidziswe munharaunda kune yakanyungudutswa. Mushure mekudzingwa ne roller, iyo butt weld iri inter-crystalline. Yakasanganiswa kuti izadzise chinangwa chewelding. High-frequency welding imhando ye induction welding (kana pressure contact welding). Izvo hazvidi weld fillers, haina welding spatter, ine yakamanikana welding yekupisa-yakakanganiswa nzvimbo, yakanaka welding maumbirwo, uye yakanaka welding mechanical properties. Nokudaro, inofarirwa mukugadzirwa kwepombi dzesimbi. Wide range of applications..

Yakakwira-frequency welding yemapombi esimbi inoshandisa ganda mhedzisiro uye pedo nemhedzisiro yealternating ikozvino. Mushure mekunge simbi (strip) yakakungurutswa uye yakaumbwa, denderedzwa chubhu isina chinhu ine chikamu chakaputsika inoumbwa, iyo inotenderedzwa mukati mechubhu iri pedyo nepakati peiyo induction coil. Kana seti yezvidziviriro (magnetic rods). Iyo inopikisa uye kuvhurwa kwechubhu isina chinhu inogadzira iyo electromagnetic induction loop. Pasi pekuita kweganda rekuita uye pedo nemhedzisiro, mupendero wechubhu isina kuvhurika inoburitsa yakasimba uye yakadzika yekupisa mhedzisiro, ichiita mupendero we weld Mushure mekukurumidza kupisa kusvika kune tembiricha inodiwa welding uye extruded ne pressure roller, the simbi yakanyungudutswa inowana inter-granular bonding uye inoumba yakasimba butt weld mushure mekutonhora.

3. High-frequency welded pipe unit

Iyo yakakwirira-frequency welding process ye straight seam simbi mapaipi inopedzwa mune yakakwirira-frequency welded pombi zvikamu. Yepamusoro-frequency welded pombi mayuniti anowanzo kuve ekugadzira roll, yakakwira-frequency welding, extrusion, kutonhora, saizi, kubhururuka saw cut, uye zvimwe zvinhu. Iyo yekumberi kweiyo unit yakashongedzerwa nekuchengetedza loop, uye kumashure kweiyo unit yakashongedzerwa nesimbi pombi inotenderera furemu; Chikamu chemagetsi chinonyanya kuve neakakwira-frequency jenareta, DC excitation jenareta, uye chiridzwa otomatiki kudzora mudziyo.

4. High-frequency excitation circuit

Iyo yepamusoro-frequency excitation circuit (inozivikanwawo seyepamusoro-frequency oscillation circuit) inoumbwa nehombe ye electron tube uye oscillation tank yakaiswa mu-high-frequency generator. Inoshandisa amplification effect ye electron tube. Kana iyo electron chubhu yakabatana kune filament uye anode, anode inobuda chiratidzo inodzoserwa kugedhi, ichigadzira yega-yekunakidzwa oscillation loop. Kukura kweiyo frequency yekukurudzira kunoenderana nemagetsi paramita (voltage, ikozvino, capacitance, uye inductance) yetangi ye oscillation..

5. Yakatwasuka musono simbi pombi yakakwira-frequency welding process

5.1 Kudzora kweweld gap

Simbi yemutsetse inodyiswa mukati me welded pombi unit. Mushure mekukungurutswa nema roller akawanda, simbi yemutsetse inopetwa zvishoma nezvishoma kuti iite denderedzwa chubhu isina chinhu ine gap rakavhurika. Rongedza kuwanda kwekudzikisa kweiyo extrusion roller kudzora gap weld pakati pe1 ne3 mm. Uye ita kuti migumo yese yewelding port ipere. Kana gaka racho rakanyanya kukura, hukama hwepedyo huchaderedzwa, kupisa kwemazuva ano eddy kuchave kusina kukwana, uye inter-crystal bonding ye weld ichave yakashata, zvichikonzera kushayikwa kwekusanganiswa kana kuputika. Kana iyo gap iri diki zvakanyanya, iyo yepedyo mhedzisiro ichawedzera uye kupisa kwewelding kuchave kwakanyanya, zvichiita kuti weld inopisa; kana kuti weld ichaita gomba rakadzika mushure mekubudiswa uye kukungurutswa, zvichikanganisa kunaka kwepamusoro we weld..

5.2 Welding tembiricha kutonga

Iyo tembiricha yewelding inonyanya kukanganiswa neiyo yakakwirira-frequency eddy ikozvino yekupisa simba. Zvinoenderana neformula (2), zvinogona kuoneka kuti iyo yepamusoro-frequency eddy ikozvino inopisa simba inonyanya kukanganiswa neiyo frequency frequency. Iyo eddy yemazuva ano yekupisa simba inofananidzwa neskweya yezvino kuwedzeredza frequency, uye ikozvino excitation frequency inokanganiswa neiyo excitation frequency. Mhedzisiro yemagetsi, yazvino, capacitance, uye inductance. The excitation frequency formula is f=1/[2π(CL)1/2]…(1) Kupi: f-excitation frequency (Hz); C-capacitance (F) mumutsara wekunakidza, capacitance = simba / Voltage; L-inductance mumutsara wekunakidza, inductance = magnetic flux / ikozvino. Izvo zvinogona kuoneka kubva pane iri pamusoro fomula kuti iyo yekuwedzeredza frequency yakaenzana kune square midzi ye capacitance uye inductance mune excitation loop, kana zvakananga kuenzana kune square midzi yevoltage uye yazvino. Chero bedzi iyo capacitance uye inductance muchiuno ichishandurwa, iyo inductive voltage kana yazvino inogona kushandura mafambiro ekusimudzira, nekudaro ichizadzisa chinangwa chekudzora tembiricha yewelding. Kune yakaderera kabhoni simbi, tembiricha yewelding inodzorwa pa1250 ~ 1460℃, iyo inogona kusangana newelding yekupinda inodikanwa ye3 ~ 5mm pombi madziro ukobvu. Uye zvakare, tembiricha yewelding inogonawo kuwanikwa nekugadzirisa kumhanya kwewelding. Kana kupisa kwekuisa kusina kukwana, iyo inopisa weld edge haigoni kusvika pakupisa kwekushisa, uye chimiro chesimbi chinoramba chakasimba, zvichiita kuti kusanganiswa kusina kukwana kana kusakwana kusina kukwana; kana kupisa kwekuisa kusina kukwana, iyo inopisa weld edge inodarika tembiricha yewelding, zvichikonzera Kupisa-kupisa kana kunyungudutswa madonhwe kuchaita kuti weld iite gomba rakanyungudutswa..

5.3 Kudzora kwe extrusion simba

Mushure mekunge micheto miviri yechubhu isina chinhu yadziyirwa kusvika kune tembiricha yewelding, inosvinwa neinosvina roller kuti igadzire tsanga dzesimbi dzakajairwa dzinopinda nekupenya pamwe chete, dzinozopedzisira dzagadzira weld yakasimba. Kana iyo extrusion simba iri diki, nhamba yemakristasi akajairwa akaumbwa ichava diki, simba resimbi weld richaderera, uye kuputika kuchaitika mushure mekushushikana; kana iyo extrusion simba yakakura kwazvo, simbi yakanyungudutswa ichasvinwa kunze kwe weld, iyo isingazoderedze chete Simba re weld rakaderedzwa, uye nhamba huru yemukati nekunze burrs ichabudiswa, kunyange kukonzera kukanganisa kwakadai se. welding lap seams..

5.4 Kudzora kwepamusoro-frequency induction coil chinzvimbo

Iyo yakakwira-frequency induction coil inofanirwa kunge iri padyo sezvinobvira kune chinzvimbo chekusvina roller. Kana iyo induction coil iri kure neiyo extrusion roller, iyo inoshanda yekupisa nguva ichave yakareba, iyo inopisa-inobatwa zone ichave yakafara, uye simba re weld richaderera; pane zvinopesana, mupendero we weld hauzopiswi zvakakwana uye chimiro chichave chisina kunaka mushure me extrusion..

5.5 Chidziviriro chimwe kana boka remagineti tsvimbo dzemapombi akaiswa. Muchinjikwa-sectional nzvimbo yekupikisa kazhinji haifanirwe kunge iri pasi pe70% yenzvimbo yepakati-yemukati dhayamita yepombi yesimbi. Basa rayo nderekugadzira iyo electromagnetic induction loop ine induction coil, mupendero wepombi isina weld musono, uye magineti tsvimbo. , ichigadzira hukama hwepedyo, kupisa kwemazuva ano eddy kunonamirwa pedyo nemucheto wechubhu blank weld, zvichiita kuti mupendero wechubhu isina chinhu ichidziswe kusvika kune welding tembiricha. Iyo inopikisa inodhonzerwa mukati mechubhu isina chinhu newaya yesimbi, uye nzvimbo yayo yepakati inofanira kunge yakamisikidzwa padyo nepakati peiyo extrusion roller. Kana muchina wavhurwa, nekuda kwekukurumidza kufamba kwechubhu isina chinhu, chinopikisa chinotambura kurasikirwa kukuru kubva mukukwesha kwemadziro emukati mechubhu isina chinhu uye inoda kuchinjwa kazhinji..

5.6 Mushure mewelding uye extrusion, weld mavanga anogadzirwa uye anoda kubviswa. Nzira yekuchenesa ndeyekugadzirisa chigadziro pachigadziro uye kuvimba nekufambisa kwekukurumidza kwepombi yakashongedzwa kuti ipfavise vanga re weld. Mabhera mukati mepombi dzakasungwa kazhinji haabviswe..

6. Zvido zvehunyanzvi uye kuongororwa kwemhando yepamusoro-frequency welded pombi

Zvinoenderana neiyo GB3092 "Welded Steel Pipe yeLow-Pressure Fluid Transport" yakajairwa, iyo dhayamita yepombi yakashongedzwa ndeye 6 ~ 150mm, iyo yezita remadziro ukobvu i2.0 ~ 6.0mm, kureba kwepombi yakasungwa kazhinji 4 ~ 10 metres uye inogona kutsanangurwa muhurefu hwakatarwa kana akawanda marefu Factory. Hunhu hwepamusoro hwepombi dzesimbi hunofanirwa kuve hwakatsetseka, uye hurema hwakadai sekupeta, kutsemuka, delamination, uye lap welding hazvibvumidzwe. Pamusoro pepombi yesimbi inobvumirwa kuve nezvikanganiso zvidiki senge scratches, scratches, weld dislocations, kutsva, uye mavanga asingapfuure kutsauka kwakashata kwemadziro emadziro. Iko kukora kwemadziro emadziro pane weld uye kuvapo kwemukati weld bars kunobvumidzwa. Mapombi esimbi akasungwa anofanirwa kuita bvunzo dzekuita zvemakanika, bvunzo dzekubata kumeso, uye bvunzo dzekuwedzera, uye dzinofanirwa kusangana nezvinodiwa zvakatemwa muyero. Iyo pombi yesimbi inofanira kukwanisa kumira kumwe kumanikidzwa kwemukati. Kana zvichidikanwa, bvunzo yekumanikidza 2.5Mpa inofanirwa kuitwa kuchengetedza kusabuda kweminiti imwe. Inotenderwa kushandisa iyo eddy yazvino kukanganisa kukanganisa nzira panzvimbo yeiyo hydrostatic bvunzo. Eddy ikozvino kuona kukanganisa kunoitwa neyakajairwa GB7735 "Eddy Current Flaw Detection Inspection Method yeSimbi Pipes". Iyo eddy yezvino kukanganisa kukanganisa nzira ndeyekugadzirisa probe pafuremu, chengeta chinhambwe che 3 ~ 5mm pakati pekuona kukanganisa uye weld, uye kuvimba nekukurumidza kufamba kwepombi yesimbi kuti iite yakazara scan ye weld. Iyo chiratidzo chekukanganisa inogadziriswa otomatiki uye inorongwa otomatiki neiyo eddy yazvino flaw detector. Kuzadzisa chinangwa chekuona kukanganisa. Ipombi yesimbi inogadzirwa nemarata esimbi kana tambo dzesimbi dzinomonereka dzobva dzasonwa. Maitiro ekugadzira e welded simbi mapaipi ari nyore, kugadzirwa kwakanaka kwakakwira, kune akawanda marudzi uye zvakatemwa, uye mari yekushandisa idiki, asi simba rakawanda rakaderera pane iro resimbi isina musono pombi. Kubva kuma1930s, nekukura nekukurumidza kwekuenderera mberi kwekugadzira simbi yemhando yepamusoro uye kufambira mberi kwewelding uye yekuongorora tekinoroji, mhando yewelds yakaramba ichivandudzika, uye mhando uye zvirevo zvepombi dzesimbi dzakasungirirwa dzakawedzera zuva nezuva. , kutsiva mapaipi esimbi asina kupera mundima dzakawanda. Sewing simbi pombi. Welded simbi pombi dzakakamurwa dzakatwasuka musono welded pombi uye spiral welded pombi maererano nechimiro weld. Iyo nzira yekugadzira iyo yakatwasuka seam welded pombi iri nyore, kugadzirwa kwakanaka kwakakwira, mutengo wakaderera, uye budiriro inokurumidza. Kusimba kwepombi dzakaiswa welded dzinowanzokwirira kupfuura dzepombi dzakaiswa seam dzakarukwa. Welded pombi ane madhayamita akakura anogona kugadzirwa kubva madiki mabheti, uye welded pombi ane madhayamita akasiyana anogonawo kugadzirwa kubva bhillet ehupamhi zvakafanana. Zvisinei, kana zvichienzaniswa nemapaipi akatwasuka ehurefu hwakafanana, kureba kweweld kunowedzerwa ne30 ~ 100%, uye kukurumidza kwekugadzira kwakaderera. Mushure mekuona kukanganisa, pombi yakasungwa inochekwa kusvika paurefu hwakatarwa nesaha inobhururuka uye inokungurutswa kubva pamutsetse wekugadzira kuburikidza neflip furemu. Migumo miviri yepombi yesimbi inofanira kunge yakaita flat-chamfered uye yakanyorwa, uye pombi dzakapedzwa dzinofanira kurongedzerwa mumasumbu ane hexagonal dzisati dzabuda mufekitari.