Covcross-rolling piercing txheej txheemyog qhov siv dav tshaj plaws hauv kev tsim cov kav dej seamless steel, thiab tau tsim los ntawm German Mannesmann cov kwv tij hauv xyoo 1883. Lub tshuab hla-dov dov muaj xws li ob-rolling cross-rolling piercing machine thiab peb-roll cross-rolling piercing machine. Lub capillary zoo tsis xws luag tsim los ntawm kev sib tw dov thiab tho lub raj tsis muaj feem ntau suav nrog sab hauv quav, sab nrauv quav, tsis sib luag phab ntsa thickness thiab nto khawb ntawm capillary.

Capillary infolding: Capillary yog qhov tsis xws luag feem ntau tshwm sim nyob rau hauv kev sib tw dov, thiab nws muaj feem cuam tshuam nrog kev ua haujlwm ntawm kev tho lub raj dawb paug, kev hloov kho ntawm cov txheej txheem tho qhov tsis zoo ntawm lub tshuab tho qhov, thiab qhov zoo ntawm qhov tho. ntsaws. Cov yam ntxwv cuam tshuam rau capillary infolding: ib qho yog txo qis (tus nqi) thiab compression lub sij hawm ua ntej lub ntsaws; lwm qhov yog lub qhov zoo; qhov thib peb yog qhov zoo ntawm qhov ntsaws.
Kev khoov sab nraud ntawm lub raj capillary: Feem ntau ntawm kev khoov sab nraud ntawm lub raj capillary yog tshwm sim los ntawm qhov tsis xws luag ntawm lub raj khoob, uas yog lwm qhov tsis zoo ntawm qhov chaw uas yooj yim tshwm sim thaum lub raj khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob Yam tseem ceeb cuam tshuam rau kev khoov sab nraud ntawm capillary: A. tube blank plasticity thiab perforation deformation; B. raj dawb paug defects; C. perforation cuab yeej zoo thiab dhau cov duab.

Cov phab ntsa tsis sib xws: Muaj cov phab ntsa tsis sib luag thiab cov phab ntsa tsis sib luag longitudinal thickness. Thaum hla dov thiab tho, qhov tsis sib xws ntawm phab ntsa transverse feem ntau yuav tshwm sim. Cov yam tseem ceeb uas cuam tshuam rau qhov tsis sib xws ntawm phab ntsa ntawm lub raj capillary yog: qhov kub thiab txias ntawm lub raj tsis muaj, qhov nruab nrab ntawm lub raj kawg, kev hloov ntawm lub qhov qauv ntawm lub tshuab tho thiab cov duab ntawm lub cuab yeej, thiab lwm yam.

Capillary nto khawb: Txawm hais tias qhov yuav tsum tau ua rau qhov zoo ntawm cov kav dej perforated capillary tsis yog nruj raws li cov yeeb nkab dov mills thiab sizing mills rau steel yeeb nkab nto zoo, qhov loj ntawm qhov khawb ntawm cov kav dej capillary tseem yuav cuam tshuam rau qhov zoo ntawm cov kav hlau. Cov yam ntxwv cuam tshuam rau kev puas tsuaj ntawm lub raj capillary: feem ntau yog vim qhov chaw ntawm cov cuab yeej perforating los yog cov lus tawm ntawm lub tshuab tho yog hnyav hnyav, ntxhib lossis lub rooj rau cov menyuam tsis tig. Txhawm rau tiv thaiv lub capillary nto los ntawm khawb los ntawm qhov tsis xws luag ntawm cov cuab yeej perforating, kev tshuaj xyuas thiab kev sib tsoo ntawm cov cuab yeej perforating (cov lus qhia lub tog raj kheej thiab trough) yuav tsum tau ntxiv dag zog.