Thecross-rolling kuboora maitirondiyo inonyanya kushandiswa mukugadzirwa kwepombi dzesimbi dzisina musono, uye yakatangwa nehama dzeGermany Mannesmann muna 1883. Muchina wokuboora unomonereka unosanganisira maviri-roll-cross-rolling piercing machine uye matatu-roll-cross-rolling piercing machine. Iyo capillary quality defects inogadzirwa nekuchinjika-kutenderedzwa uye kuboora chubhu isina chinhu kunyanya inosanganisira mukati kupetwa, kunze kupeta, kukora kwemadziro asina kuenzana uye kukwenya kwepamusoro kwecapillary.

Capillary infolding: Capillary ndiyo hurema hunogona kuitika mukuboora-kuchinjika, uye ine hukama zvakanyanya nekuboora kwechubhu isina chinhu, kugadziridzwa kwemaitiro ekuboora maparamita emuchina wekuboora, uye kunaka kwekubaya. plug. Zvinhu zvinokanganisa capillary infolding: imwe ndiyo kudzikiswa (chiyero) uye nguva yekumanikidza pamberi peplug; imwe igomba chimiro; chechitatu imhando yepamusoro yeplug.
Kubhenda kwekunze kwecapillary chubhu: Kuzhinji kwekupetera kwekunze kwecapillary chubhu kunokonzerwa nehurema hwepamusoro hwechubhu isina chinhu, chinova chimwe chikanganiso chepamusoro chinokonzereswa zviri nyore kana chubhu isina chinhu ichitenderedzwa nekuboorwa. Zvinhu zvinokanganisa capillary outward bending: A. chubhu blank plasticity uye perforation deformation; B. chubhu isina chinhu pamusoro pezvikanganiso; C. perforation mudziyo unhu uye kupfuura chimiro.

Husina kuenzana capillary madziro ukobvu: Kune asina kuenzana transverse madziro ukobvu uye asina kuenzana longitudinal madziro ukobvu. Kana kuchinjika nekuboora, kusaenzana kuchinjika kwemadziro ukobvu kunowanzoitika. Zvinhu zvikuru zvinokanganisa kusaenzana kuchinjika kwemadziro ukobvu hwecapillary chubhu ndeiyi: tembiricha yekudziya yechubhu isina chinhu, iyo yepakati peiyo chubhu kupera, kugadzirisa kwegomba patani yemuchina wekuboora uye chimiro chechishandiso, nezvimwe.

Capillary surface scratches: Kunyangwe izvo zvinodikanwa zvemhando yepasi peforated capillary pombi hazvina kuomarara sezviya zvepombi inotenderedza mill uye saizi mill yesimbi pombi yemhando yepamusoro, kukwaradzika kwepamusoro kwepombi capillary kuchakanganisawo kunaka kwepaipi yesimbi. Zvinhu zvinokanganisa kubvongodzwa kwepamusoro kwecapillary chubhu: kunyanya nekuti pamusoro pechigadzirwa cheperforating kana tafura yekubuda yemuchina wekuboora yakasakara, rough kana roller tafura haina kutenderera. Kuti udzivise iyo capillary surface kuti irege kucheneswa nekuremara kwepamusoro kwechigadzirwa che perforating, kuongorora uye kugaya kwechigadzirwa cheperforating (guide cylinder uye trough) inofanira kusimbiswa.