Kev Txhais Lus
Kav precision (hu thiab hu ua kav txias, kav steel precision, lossis kav uas muaj qhov ntev ze ze heev) yog tsim los nrog qhov ntev qhov sib txawv uas nruj dua thiab qhov chaw du zoo dua li kav txheej txheem. Kav precision ua tiav qhov OD qhov sib txawv ntawm ±0.05-0.10 mm thiab qhov chaw ntxhib (surface roughness) Ra ≤ 0.8 μm, piv nrog kav txheej txheem qhov sib txawv ntawm ±0.5 mm thiab Ra 3.2-12.5 μm. Cov yam ntxwv zoo dua no ua rau kav precision tsim nyog rau cov ntawv thov uas lub kav ua haujlwm ntawm kev siv tshuab lossis kev tsim qauv es tsis yog tsuas yog tuav kua dej, xws li hydraulic cylinders, pneumatic actuators, thiab cov khoom tshuab precision.
Kav txheej txheem, ntawm qhov sib piv, yog tsim los kom ua tau raws li cov kev xav tau ntawm cov qauv xws li ASTM A106, A53, thiab API 5L, qhov uas lub luag haujlwm tseem ceeb yog thauj kua dej ntawm qhov siab. Qhov ntev qhov sib txawv ntawm kav txheej txheem yog txaus rau kev sib txuas ntawm kav fittings thiab kev vuag, tab sis tsis txaus rau cov ntawv thov uas xav tau qhov sib haum ntawm qhov sliding lossis qhov taub sab hauv txhaj. Kev xaiv ntawm kav precision thiab kav txheej txheem yog nyob ntawm cov kev xav tau tshwj xeeb ntawm daim ntawv thov thiab seb tus nqi ntxiv ntawm kav precision puas tsim nyog vim qhov tshem tawm cov haujlwm tshuab ntxiv.
Kev Sib Piv Txheej Txheem Tsim Kho
Kav precision yog tsim los ntawm cov txheej txheem kos txias uas muaj ntau yam. Cov khoom pib yog ib lub kav seamless uas tau dov kub (mother tube) uas tau tshuaj acid tshem tawm cov vossis saum npoo, ces kos txias los ntawm lub tshuab die thiab hla ib lub mandrel kom txo qhov txoj kab uas hla thiab phab ntsa tuab mus rau qhov ntev kawg. Cov txheej txheem kos txias ua rau cov steel tawv (work-hardens), nce zog tab sis txo qhov ductility. Tom qab kos, lub kav yog annealed (feem ntau yog bright annealing nyob rau hauv lub qhov cub uas tswj hluav taws xob) los rov qab ductility thiab tso tawm cov kev ntxhov siab hauv lub cev. Cov kauj ruam kawg suav nrog kev nthuav ncaj (hauv lub tshuab multi-roll straightener), txiav rau qhov ntev, thiab ua tiav qhov chaw.
Kav txheej txheem (seamless) yog tsim los ntawm kev dov kub ib lub billet uas tau tho, uas tsim ib lub kav nrog qhov chaw ntxhib dua thiab qhov ntev qhov sib txawv dav dua. Cov kub dov kub (siab tshaj 1000°C) ua rau cov oxidation saum npoo (mill scale) uas yuav tsum tau tshem tawm los ntawm kev pickling lossis shot blasting yog tias xav tau. Kav txheej txheem welded yog tsim los ntawm steel phaj lossis coil thiab welded raws ntev. Ob txoj kev no tsis ua tiav qhov precision ntawm qhov ntev raws li kev kos txias vim tias cov txheej txheem ua haujlwm kub tsis muab kev tswj tib yam rau qhov ntev kawg raws li kev kos txias txo cov passes.
Kev Sib Piv Qhov Ntev Qhov Sib Txawv
| Parameter | Kav Precision | Kav Txheej Txheem |
|---|---|---|
| OD Qhov Sib Txawv | ±0.05 mm | ±0.5 mm |
| Phab Ntsa Tuab Qhov Sib Txawv | ±5% | ±12.5% |
| Kev Ncaj Ncaj | 0.5 mm/m | 1.0 mm/m |
| Qhov Ntev Qhov Sib Txawv | ±1 mm | ±5 mm |
| Qhov Chaw Ntxhib Ra | ≤ 0.8 μm | 3.2-12.5 μm |
Qhov ntev qhov sib txawv nruj dua ntawm kav precision yog qhov tseem ceeb rau cov ntawv thov uas lub kav siv ua lub tog raj cylindrical (hydraulic cylinder) qhov uas lub nplhaib piston yuav tsum swb du hauv lub kav. Qhov ±0.05 mm OD qhov sib txawv ua kom muaj kev sib haum zoo hauv cov bearing housings thiab mounting brackets. Qhov phab ntsa tuab qhov sib txawv ntawm ±5% (piv rau ±12.5% rau kav txheej txheem) muab cov yam ntxwv ntawm qhov hnyav, zog, thiab kev hloov cua sov uas yooj yim dua los twv.
Kev Sib Piv Yam Ntxwv Tshuab (Mechanical Properties)
Kev kos txias nce qhov yield thiab tensile zog ntawm kav precision los ntawm kev work hardening. Ib lub kav precision kos txias rau hauv carbon steel (St52/DIN 2391 equivalent) muaj qhov yield zog ntawm 320-380 MPa piv nrog 240 MPa rau A106 Gr.B kav txheej txheem. Txawm li cas los xij, kev kos txias txo qhov ductility: elongation rau kav precision feem ntau yog 10-15% piv nrog 20-25% rau kav txheej txheem. Tom qab bright annealing, zog txo thiab ductility nce, muab qhov sib npaug zoo ib yam li kav txheej txheem normalized. Qhov hardness ntawm kav precision uas tseem nyob raws li kos yog siab dua (180-220 HB) ntau dua kav txheej txheem (140-160 HB), uas txhim kho qhov tiv thaiv kev hnav rau kev sib txuas sliding tab sis yuav txo qhov machinability.
Kev Sib Piv Qhov Chaw Ua Tiav
Qhov chaw ua tiav ntawm kav precision yog ib qho tseem ceeb tshaj plaws ntawm nws cov yam ntxwv tshwj xeeb. Cov txheej txheem kos txias, ua ke nrog qhov chaw du ntawm lub tshuab die, ua rau qhov chaw sab hauv thiab sab nraud ntxhib Ra ≤ 0.8 μm, thiab nrog kev ua tshwj xeeb (honing lossis skiving), Ra tuaj yeem ncav cuag 0.2 μm - ib qho chaw zoo li iav. Qhov chaw sab hauv du no yog qhov tseem ceeb rau daim ntawv thov hydraulic cylinder qhov uas lub nplhaib piston yuav tsum tuav lub ntsiab ruaj khov thaum swb hauv qhov siab. Qhov chaw du kuj txo qhov kev sib txhuam ntawm kua dej thiab txhim kho cov yam ntxwv ntws.
Kav txheej txheem muaj qhov chaw ua tiav kub rwb thiab ntxhib Ra 3.2-12.5 μm. Qhov chaw yuav muaj mill scale, pits, thiab lwm yam kev tsis zoo saum npoo uas tsim nyog rau cov kav dej siab tab sis yuav ua puas lub nplhaib lossis ua rau hnav ntau dhau hauv cov ntawv thov precision. Qee cov kav txheej txheem tuaj yeem muab rau pickled (acid cleaned) los tshem tawm mill scale, muab qhov chaw matte grey nrog Ra txog 3.2 μm - zoo dua li hot-rolled tab sis tseem tsis txog qhov zoo ntawm kav precision qhov chaw.
Kev Sib Piv Daim Ntawv Thov
Kav precision yog qhov tseem ceeb rau hydraulic thiab pneumatic cylinder barrels, qhov uas qhov chaw sab hauv ua lub phab ntsa cylinder. Qhov kev sib koom ua ke ntawm qhov ID txhaj, qhov chaw du, thiab phab ntsa tuab sib xws ua rau lub nplhaib piston ua haujlwm zoo tsis muaj kua dej tawm. Lwm cov ntawv thov suav nrog automotive shock absorber tubes, telescopic boom sections rau cov khoom siv txav mus los, precision shafts thiab rollers, bearing races, thiab mechanical tubing rau kev tshuab. Cov neeg tsim khoom uas tsis tuaj yeem hloov pauv kav txheej txheem rau kav precision suav nrog hydraulic cylinder manufacturers, automotive suspension manufacturers, thiab precision machine builders.
Kav txheej txheem yog siv rau kev thauj kua dej, kev txhawb nqa qauv, piling, thiab kev siv dav dav qhov uas kev tuav lub siab thiab lub zog qauv yog qhov tseem ceeb tshaj plaws. Hauv ntau rooj plaub, kav txheej txheem tuaj yeem muab tho thiab honed los tsim qhov chaw sab hauv precision, tab sis qhov no ntxiv cov nqi tseem ceeb - feem ntau ntau dua qhov sib txawv ntawm kav txheej txheem thiab kav precision.
Kev Txheeb Xyuas Tus Nqi
Kav precision feem ntau yog them tus nqi ntxiv 30-100% dhau kav txheej txheem ntawm tib qhov loj nominal thiab khoom. Tus nqi ntxiv qhia txog cov kauj ruam tsim kho ntxiv (pickling, ntau qhov kev kos txias, bright annealing, straightening) thiab cov kev xav tau ntawm kev tshuaj xyuas qhov ntev siab dua. Txawm li cas los xij, thaum suav tag nrho tus nqi ntawm kev ua tswm, kav precision tuaj yeem pheej yig dua hauv cov ntawv thov uas yuav xav tau kev tshuab kav txheej txheem. Piv txwv li, kev tho thiab honing kav txheej txheem rau hydraulic cylinder raug nqi ntau dua qhov nqi ntxiv rau kav precision uas muab qhov txoj kab sab hauv uas xav tau nyob rau hauv qhov sib txawv. Rau cov ntawv thov uas tuaj yeem siv kav txheej txheem li qub, tus nqi ntxiv rau kav precision tsis tsim nyog.
Cov Qauv Siv Tau
Kav precision yog tswj hwm los ntawm cov qauv tshwj xeeb rau cov kav txias: DIN 2391 (seamless precision steel tubes), EN 10305-1 (seamless cold-drawn precision tubes), thiab GB/T 3639 (Chinese precision steel tube standard). Cov qauv no txhais cov qhov ntev qhov sib txawv, cov yam ntxwv tshuab, thiab cov kev xav tau ntawm qhov chaw zoo. Kav txheej txheem ua raws li ASTM A106, A53, API 5L, thiab cov qauv zoo sib xws rau carbon steel, thiab ASTM A312, A269 rau stainless steel. Ib txoj kev xaiv nruab nrab yog ASTM A519 (mechanical tubing), uas muab qhov ntev ze dua li kav txheej txheem tab sis tsis nruj npaum li cov lus qhia kav precision. Rau kev sib piv tag nrho ntawm cov qauv thoob ntiaj teb, saib peb Kav Qauv Sib Piv.
Yuav Ua Li Cas Yuav Kav Precision
Thaum xaj kav precision, qhia meej: OD thiab qhov sib txawv, ID thiab qhov sib txawv (lossis phab ntsa tuab thiab qhov sib txawv), qhov chaw ntxhib qhov xav tau (Ra nqi), qhov ncaj nraim qhov xav tau, qib khoom thiab qauv, qhov xa tuaj (cold drawn, annealed, lossis normalized), thiab qhov ntev. ManufacturerPipe muab kav precision hauv carbon steel thiab low-alloy steel los ntawm 20 mm mus rau 200 mm OD, nrog phab ntsa tuab los ntawm 2 mm mus rau 20 mm. Peb tuaj yeem muab ob qho tag nrho raws li kos thiab bright-annealed kom ua tau raws li koj cov kev xav tau tshwj xeeb ntawm cov yam ntxwv tshuab.
Xav Tau Kav Precision Rau Koj Daim Ntawv Thov?
Tiv tauj peb pab neeg engineering rau kev xaiv kav precision thiab tus nqi sib tw rau cov kav txias thiab bright-annealed.
Tau Tus Nqi
Cov Khoom Siv Qeb
