Kushanda kwemandrels akamanikidzwa

Iyo mandrel chishandiso chakakosha mukugadzira mapaipi asina musono. Inopinzwa mukati memuviri wepombi, ichishanda pamwe chete nema rollers kuti iite annular pass, nokudaro ichibatsira mukuumba pombi. Mandrels anoshandiswa zvakanyanya mumatanho akadai seanoenderera mberi achitenderedza mill, cross-roll elongation, periodic pombi inotenderedza zvigayo, kuboora, uye kutonhora kukunguruka uye kudhirowa kwepombi.

Chaizvoizvo, iyo mandrel irefu cylindrical bar, yakafanana nepuragi inobaya, inotora chikamu mukukanganisa kwepombi mukati meiyo deformation zone. Maitiro ayo ekufambisa anosiyana nenzira dzakasiyana dzekukunguruka: panguva yekuchinjika, iyo mandrel inotenderera uye inofamba axially mukati mepombi; mukufamba kwenguva refu (sekutenderera kunoramba kuchiita, kukunguruka nguva nenguva, nekuboora), mandrel haitenderere asi inofamba neaxial pamwe nepombi.

Muchigayo chinoenderera mberi, mandrels anowanzo shanda mumapoka, neboka rega rega rine mandrels matanhatu. Iyo modhi dzekushanda dzinogona kuiswa mumhando nhatu: inoyangarara, inomanikidzwa, uye semi-inoyangarara (inozivikanwawo semi-yakamanikidzwa). Ichi chinyorwa chinotarisa nezvekushanda kweakamanikidzwa mandrels.

Pane nzira mbiri dzekushanda dze contrained mandrels:

1. Traditional Method: Pakupera kwekukunguruka, mandrel anomira kufamba. Mushure mekunge goko rabviswa kubva ku mandrel, iyo mandrel inokurumidza kudzoka, inobuda mumutsara wekukunguruka, uye inotonhodzwa nekuzorwa isati yashandiswa zvakare. Iyi nzira inogara ichishandiswa muMannesmann Piercing Mills (MPM).
2. Yakavandudzwa Nzira: Saizvozvowo, pakupera kwekukunguruka, mandrel inomira kufamba. Zvisinei, mushure mokunge goko rabviswa kubva ku mandrel ne stripper, pane kudzoka, mandrel inoenda mberi nekukurumidza, ichitevera goko kuburikidza ne stripper. Chete mushure mekupfuura nemu stripper iyo mandrel inobuda pamutsetse wekutonhodza, kuzora, uye kushandiswa zvakare. Iyi nzira inoderedza mandrel's idle time pamutsara, inonyatso kupfupisa kutenderera kutenderera uye kuwedzera kumhanyisa kumhanya, kuwana kumhanya kweanosvika 2.5 pombi paminiti.

Musiyano mukuru pakati peidzi nzira mbiri uri munzira yekufamba kwe mandrel mushure mekunge goko rabviswa: munzira yekutanga, mandrel inofamba ichienda kune rumwe rutivi rwegoko, ichidzora kubva paguyo inokunguruka isati yabuda mutsetse wekukunguruka. Munzira yechipiri, mandrel inofamba nenzira imwechete segoko, ichibuda muguyo, ichipfuura nemu stripper, uye ichibuda mumutsara wekukunguruka.

Izvo zvakakosha kuti uzive kuti nenzira yechipiri, sezvo mandrel ichida kupfuura nemu stripper, stripper rolls inofanirwa kunge iine kukurumidza kuvhurika-yakavharika basa pakukungurutsa mapaipi esimbi akatetepa (apo chiyero chekudzikisa cheiyo stripper chinenge chiripo. zvakapetwa kaviri kukora kwemadziro egoko) kudzivirira mandrel kubva pakukuvadza stripper rolls.