Kupanga mapaipi achitsulo kunayamba kumayambiriro kwa zaka za m'ma 1800. Poyamba, mapaipi ankapangidwa ndi manja - potenthetsa, kupinda, kulumikiza, ndi kulumikiza m'mbali. Njira yoyamba yopangira mapaipi yodziyimira yokha inayambitsidwa mu 1812 ku England. Njira zopangira zakhala zikusintha kuyambira nthawi imeneyo. Njira zina zodziwika bwino zopangira mapaipi zafotokozedwa pansipa.
Kuwotcherera Pakhosi
Kugwiritsa ntchito njira yolumikizira mapaipi pa lap welding kunayamba kugwiritsidwa ntchito kumayambiriro kwa zaka za m'ma 1920. Ngakhale kuti njira imeneyi siigwiritsidwanso ntchito, mapaipi ena omwe amapangidwa pogwiritsa ntchito njira yolumikizira mapaipi akadali kugwiritsidwa ntchito mpaka pano.
Pa ndondomeko yolumikiza mapewa, chitsulo chinkatenthedwa mu ng'anjo kenako n’kukulungidwa kukhala ngati silinda. M’mbali mwa mbale yachitsuloyo “zinkapakidwa mapewa”. Kuphimba mapewa kumaphatikizapo kuphimba m’mphepete mwa mkati mwa mbale yachitsuloyo, ndi m’mphepete mwa mbali inayo ya mbaleyo. Kenako msokowo unkalumikizidwa pogwiritsa ntchito mpira wolumikizira, ndipo chitoliro chotenthetsera chinkadutsa pakati pa ma rollers zomwe zinkakakamiza msokowo kuti ugwirizane.
Ma weld opangidwa ndi lap welding si odalirika monga omwe amapangidwa pogwiritsa ntchito njira zamakono. Bungwe la American Society of Mechanical Engineers (ASME) lapanga equation yowerengera kuthamanga kovomerezeka kwa chitoliro, kutengera mtundu wa njira yopangira. Equation iyi ikuphatikiza variable yotchedwa "joint factor", yomwe imachokera ku mtundu wa weld yomwe imagwiritsidwa ntchito popanga msoko wa chitoliro. Mapaipi opanda msoko ali ndi joint factor ya 1.0 Lap welded chitoliro chili ndi joint factor ya 0.6.
Chitoliro Choponderezedwa ndi Magetsi
Chitoliro cholimba chamagetsi (ERW) chimapangidwa pogwiritsa ntchito pepala lachitsulo lozizira kukhala mawonekedwe a cylindrical. Kenako magetsi amadutsa pakati pa m'mphepete ziwiri za chitsulo kuti atenthe chitsulocho mpaka pomwe m'mphepete mwake zimakakamizika pamodzi kuti apange mgwirizano popanda kugwiritsa ntchito zinthu zodzaza welding. Poyamba njira yopangirayi imagwiritsa ntchito mphamvu ya AC yotsika kwambiri kuti itenthe m'mphepete. Njira yotsika iyi idagwiritsidwa ntchito kuyambira m'ma 1920 mpaka 1970. Mu 1970, njira yotsika kwambiri idalowedwa m'malo ndi njira ya ERW yokwera kwambiri yomwe idapanga weld yapamwamba kwambiri.
Pakapita nthawi, ma weld a chitoliro cha ERW chotsika kwambiri adapezeka kuti amatha kuwononga msoko wosankhidwa, ming'alu ya zingwe, komanso kusagwirizana kosayenera kwa misoko, kotero ERW yotsika kwambiri sigwiritsidwanso ntchito popanga chitoliro. Njira yotsika kwambiri ikugwiritsidwabe ntchito popanga chitoliro chogwiritsidwa ntchito popanga mapaipi atsopano.
Chitoliro Chopangidwa ndi Magetsi Chophwanyika
Chitoliro cholumikizidwa ndi magetsi chinapangidwa kuyambira mu 1927. Kulumikiza kwa flash kunachitika popanga pepala lachitsulo kukhala mawonekedwe a cylindrical. M'mbali mwake munkatenthedwa mpaka theka-kusungunuka, kenako n’kukakamizidwa pamodzi mpaka chitsulo chosungunuka chitakankhidwira kunja kwa cholumikizira ndikupanga mkanda. Monga chitoliro cha ERW chotsika, mipata ya chitoliro cholumikizidwa ndi flash imayamba kuzizira komanso ming'alu ya zingwe, koma pang'ono kuposa chitoliro cha ERW. Mtundu uwu wa chitoliro umathanso kulephera chifukwa cha malo olimba mu chitsulo cha mbale. Chifukwa chitoliro chachikulu cholumikizidwa ndi flash chinapangidwa ndi wopanga mmodzi, akukhulupirira kuti malo olimba awa adachitika chifukwa cha kuzimitsidwa kwa chitsulo mwangozi panthawi yopanga yomwe imagwiritsidwa ntchito ndi wopangayo. Kulumikiza kwa flash sikugwiritsidwanso ntchito popanga chitoliro.
Chitoliro Choviikidwa Pawiri Choviikidwa Pamodzi ndi Arc Welded (DSAW)
Mofanana ndi njira zina zopangira mapaipi, kupanga Double Submerged Arc Welded Pipe kumaphatikizapo kupanga ma plate achitsulo kukhala mawonekedwe ozungulira. M'mphepete mwa mbale yokulungidwayo zimapangidwa kotero kuti mizere yooneka ngati V imapangidwira mkati ndi kunja kwa malo a msoko. Kenako msoko wa paipi umalumikizidwa ndi njira imodzi ya arc welder pamwamba ndi kunja (motero imadzazidwa kawiri). Msoko wolungidwa umamizidwa pansi pa madzi.
Ubwino wa njirayi ndikuti ma weld amalowa 100% ya khoma la chitoliro ndikupanga mgwirizano wolimba kwambiri wa chitolirocho.
Chitoliro Chosasokonekera
Chitoliro chopanda msoko chapangidwa kuyambira m'ma 1800. Ngakhale kuti njira imeneyi yakhala ikusintha, zinthu zina sizinasinthe. Chitoliro chopanda msoko chimapangidwa pobowola chitoliro chotentha chozungulira ndi mandrel. Chitsulo chobowoka chimakulungidwa ndikutambasulidwa kuti chifike kutalika ndi m'mimba mwake zomwe mukufuna. Ubwino waukulu wa chitoliro chopanda msoko ndi kuchotsa zolakwika zokhudzana ndi msoko; komabe, mtengo wopangira ndi waukulu.
Chitoliro choyambirira chopanda msoko chinkavutika ndi zolakwika zomwe zinkachitika chifukwa cha zinyalala zomwe zinali m'chitsulo. Pamene njira zopangira zitsulo zinkapita patsogolo, zolakwikazi zinachepa, koma sizinathetsedwe kwathunthu. Ngakhale zikuwoneka kuti chitoliro chopanda msoko chingakhale bwino kuposa chitoliro chopangidwa ndi msoko, kuthekera kokweza makhalidwe omwe amafunidwa m'chitoliro n'kochepa. Pachifukwa ichi, chitoliro chopanda msoko pakadali pano chikupezeka m'makoma otsika komanso okhuthala kuposa chitoliro cholumikizidwa.
Jindalai Steel Group ndi katswiri pakupanga mapaipi apamwamba a ERW (Electric Resistance Welded) ndi SSAW (Spiral Submerged Arc welded). Kampani yathu ili ndi makina apamwamba owongolera okhazikika a φ610 mm, komanso makina ozungulira a φ3048mm. Komanso, kupatula mafakitale a ERW ndi SSAW, tili ndi mafakitale ena atatu ogwirizana nawo opanga LSAW ndi SMLS ku China konse.
Ngati kugula mapaipi kukuyandikirani, pemphani mtengo. Tikukupatsani imodzi yomwe ingakupatseni zinthu zomwe mukufuna mwachangu. Tumizani funso lanu ndipo tidzakhala okondwa kukufunsani mwaukadaulo.
Ife Jindalai Steel Group ndife opanga, ogulitsa kunja, ogulitsa masheya komanso ogulitsa mitundu yosiyanasiyana ya Chitoliro cha Chitsulo. Tili ndi makasitomala ochokera ku Thane, Mexico, Turkey, Pakistan, Oman, Israel, Egypt, Arab, Vietnam, Myanmar. Tumizani funso lanu ndipo tidzakhala okondwa kukufunsani mwaukadaulo.
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Nthawi yotumizira: Disembala-19-2022
