Thaum cov neeg yuav khoom feem ntau hnov 'tshwj xeeb alloy bushing', lawv tam sim ntawd dhia mus rau qib khoom - Inconel 718, Stellite 6, Hastelloy C-276 - thiab xav tias txoj haujlwm tiav. Qhov ntawd yog thawj, thiab kim tshaj plaws, yuam kev. Lub alloy tsuas yog qhov pib; dab ntxwg nyoog tiag tiag yog nyob rau hauv cov txheej txheem fabrication thiab cov kev pab cuam tiag tiag ib puag ncig, uas cov luam feem ntau tau yuam kev. Kuv tau pom ntau txoj haujlwm uas zoo nkauj zoo nkauj tshuab cobalt-raws li bushing ua tsis tiav hauv lub lis piam vim tias txhua tus tau tsom mus rau 'tshwj xeeb' thiab tsis nco qab txog 'bushing' ib feem ntawm nws txoj haujlwm.
Qhov tshwj xeeb hauv Alloy tsis yog Magic Bullet
Cia peb tham txog cobalt-based alloys, zoo li Stellite. Yog, zoo heev hnav thiab corrosion kuj, zoo heev rau cov ntawv thov kub xws li turbine txuas lossis cov twj slurry hnyav. Tab sis kev qhia nws yog qhov yooj yim. Cov txheej txheem casting rau cov ntaub ntawv no yog cov tsiaj nyaum sib txawv. Lawv tsis zoo li nchuav grey hlau. Cov cwj pwm yaj, lub plhaub pwm cov tshuaj tiv thaiv, qhov ua kom khov kho - yog tias koj qhov chaw tsim khoom tsis muaj kev paub tob, koj yuav tau txais micro-cracking, suav nrog, los yog tsis sib haum xeeb ntawm lub rooj vag. Nws zoo nkaus li zoo kawg nkaus kom txog thaum nws mus rau hauv lub tshuab tsom iav lossis hauv kev pabcuam.
Kuv nco qab lub chaw tsim khoom valve nrhiav ib pawg ntawm tshwj xeeb alloy bushings rau corrosive chemical ua kab. Cov ntaub ntawv pov thawj zoo tag nrho, rau ASTM A494. Tab sis nyob rau hauv kev ua hauj lwm, lawv pom ntxov ntxov galling. Kev ntsuas tsis ua haujlwm taw qhia rau kev faib cov carbide. Lub casting txias sai heev, tsim kom muaj nkig, tsis sib xws carbide network ntawm cov ciam teb. Cov spec tau ntsib, tab sis metallurgy tsis ncaj ncees lawm rau daim ntawv thov. Qhov kho tsis yog cov khoom tshiab; nws yog ib qho kev hloov kho kev xyaum nrog kev tswj kom txias. Qhov no yog qhov uas tus khub nyiam Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) sawv tawm. Nrog peb lub xyoo caum hauv lub plhaub thiab peev casting, lawv yuav pom thiab daws qhov teeb meem ntawm qhov cua txias no thoob plaws cov tsev neeg sib txawv. Nws yog cov txheej txheem kev paub, tsis yog lub qhov cub xwb, qhov tseem ceeb.
Lwm qhov kev saib xyuas ntau tshaj yog machinability. Nickel-based alloys muaj npe nrov rau kev ua haujlwm hardening. Koj tsim qhov nruj-tolerance bushing nrog nyias ntu. Yog hais tias lub CNC machining sequence yog tawm - tsis ncaj ncees lawm qib, noj tsis raug / ceev, tsis zoo coolant daim ntawv thov - koj induce residual stresses los yog ib tug hardened daim tawv nqaij txheej. Ib feem dhau qhov kev soj ntsuam zaum kawg tab sis deforms los yog tawg nyob rau hauv thawj zaug load. Lub bushing tsis poob; cov txheej txheem tom qab casting tau ua.
Tsim los tsim, Tsis yog rau kev ua haujlwm xwb
Engineers nyiam tsim lub zoo tagnrho bushing: complex lubrication raws, undercuts rau seal tuav, nyias phab ntsa rau yuag. Tom qab ntawd lawv muab pov rau ntawm phab ntsa rau kev tsim khoom. Nrog tshwj xeeb alloys, qhov no yog ib daim ntawv qhia rau kev puas tsuaj thiab astronomical nqi. Txhua tus tsim nuance multiplies qhov nyuaj.
Piv txwv li, cov qhov sib tsoo ntawm cov roj qhov sib txawv. Nyob rau hauv ib tug steel bushing, koj xyaum lawv tom qab casting. Nrog ntau npib tsib xee los yog cobalt alloys, tom qab-casting drilling yog tawv. Feem ntau nws yog qhov zoo dua los nrum lawv hauv kev siv cov cores ceramic. Tab sis qhov ntawd yuav tsum muaj tus kws tshaj lij pwm tsim kom ntseeg tau tias cov tub ntxhais tau txais kev txhawb nqa zoo thiab tsis hloov pauv thaum lub sij hawm nchuav, thiab cov khoom tseem ceeb tuaj yeem raug tshem tawm tag nrho tom qab casting yam tsis muaj qhov seem seem. QSY kev txawj ntse hauv plhaub molding thiab peev casting ua qhov tseem ceeb ntawm no. Lawv tuaj yeem qhia txog qhov ua tau zoo geometry txij thaum pib. Lub channel yuav tsum yog puag ncig lossis oval? Lub kaum sab xis me ntsis tuaj yeem ua rau cov tub ntxhais tshem tawm 100% txhim khu kev qha yam tsis muaj kev cuam tshuam rau kev ua haujlwm. Qhov rov qab-thiab-tawm-tawm no yog dab tsi cais cov qauv uas ua haujlwm los ntawm cov khoom npaj txhij.
Phab ntsa thickness uniformity yog lwm yam uas ntsiag to killer. Lub bushing yuav muaj ib tug tuab flange thiab lub tes tsho nyias. Kev sib txawv txias hauv pwm tsim kev ntxhov siab. Nyob rau hauv ib qho nkig tshwj xeeb alloy, qhov no tuaj yeem ua rau lub kua muag kub - cov kab nrib pleb me me uas tshwm sim thaum lub zog khov. Tej zaum koj yuav tsis pom lawv yam tsis muaj dye penetrant tshuaj xyuas. Zaj lus qhia: qee zaum koj yuav tsum tau ntxiv cov khoom me me hauv ib ntu kom ua kom txias txias, tom qab ntawd tshuab rov qab. Nws zoo li khib nyiab, tab sis nws pheej yig dua li 30% seem seem.
Qhov tsis nco qab qhov tseem ceeb: Lub Mating nto
Nov yog zaj lus qhia nyuaj-yeej: bushing yeej tsis ua haujlwm ib leeg. Nws qhov kev ua tau zoo yog cov cuab yeej system. Koj tuaj yeem muab lub zoo meej Stellite bushing rau hauv cov vaj tsev me me, thiab nyob rau hauv kev thauj khoom, lub tsev softer deforms, misaligning lub bushing thiab ua rau ntug-loading thiab ceev tsis ua hauj lwm. Cov khoom sib txuas yog txhua yam.
Peb muaj ib rooj plaub ntawm qhov hnyav-duty excavator pivot. Cov tshwj xeeb alloy bushing (cobalt-based) tau teev tseg rau kev puas tsuaj. Tus pin yog hardened steel. Hom tsis ua hauj lwm yog hnyav hnyav hnav. Qhov teeb meem? Qhov sib txawv hardness yog dhau heev lawm. Ob qhov chaw micro-welded nyob rau hauv kev sib cuag siab. Qhov kev daws teeb meem yog kom txo qis cov bushing hardness me ntsis thiab xyuas kom meej qhov chaw tiav ntawm tus pin. Nws yog counter-intuitive - peb degraded lub bushing khoom vaj tse kom lub system ua hauj lwm. Qhov no yog hom kev txiav txim siab zoo uas los ntawm pom qhov tsis ua haujlwm hauv thaj chaw, tsis yog los ntawm cov ntaub ntawv.
Corrosion compatibility yog lwm minefield. Ib qho super corrosion-resistant nickel alloy bushing tuaj yeem tsim lub cell galvanic nrog lub tsev tsis muaj steel hlau nyob hauv ib puag ncig ntub dej, noj cov tsev nyob. Qee zaum, koj yuav tsum qhia kom meej lub tes tsho cais lossis cov txheej txheem tsis yog rau lub bushing, tab sis tiv thaiv nws cov neeg nyob ze. Qhov system saib yog tsis-negotiable.
Thaum CNC Machining Ua los yog tawg lub Bushing
Casting tau txais koj cov duab ntxhib, tab sis qhov kawg CNC machining txhais qhov kev ua tau zoo. Kev kam rau siab tsuas yog ib kab ntawm daim duab. Rau lub bushing, qhov kev ncaj ncees ntawm qhov chaw yog qhov tseem ceeb. Cov txheej txheem machining yuav tsum tsis txhob degrade cov khoom siv tsim thaum lub sij hawm casting thiab kev kho cua sov.
Siv cov nag lossis daus-tawv tawv nickel alloy zoo li Inconel 718. Nws tau txais nws lub zog los ntawm kev kho cua sov tshwj xeeb. Aggressive machining tuaj yeem tsim kom muaj cua sov hauv zos kom txaus rau cov khoom siv hauv cheeb tsam ntawd, tsim kom muaj qhov muag muag. Lub bushing tej zaum yuav muaj qhov ntev zoo meej tab sis ua tsis tiav hauv kev thauj khoom vim qhov tsis muaj zog hauv cheeb tsam no. Ib tus kws tshaj lij tshuab, lossis lub khw nrog kev sib xyaw ua ke thiab kev ua haujlwm zoo li QSY, paub siv cov cuab yeej ntse, cov cuab yeej tshwj xeeb, cov cua txias siab, thiab lub teeb ua tiav kom khaws cov substrate.
Tom qab ntawd muaj qhov bore tiav. Daim iav tiav tsis yog ib txwm zoo tshaj. Rau lub bushing txhais tau tias khaws cov roj, yuav tsum muaj ib qho qauv ntoo khaub lig-hatch. Rau ib qho kev khiav hauj lwm qhuav lossis nrog cov khoom siv roj nplaum, qhov sib txawv roughness nruab nrab (Ra) yog qhov zoo. Kev sib txuas lus qhov yuav tsum tau ua haujlwm rau pab pawg machining yog qhov tseem ceeb. Tsuas yog tso Ra 0.4 rau ntawm daim duab yuav tsis raug.
Tus nqi vs. Lub neej: Kev suav tiag
Qhov loj tshaj pushback rau tshwj xeeb alloy bushings yog ib txwm nqi. Ib qho cobalt-alloy bushing tuaj yeem raug nqi 50x nws cov hlau sib npaug. Framing no raws li ib feem nqi yog li cas koj poob qhov kev sib cav. Kev suav yog tag nrho cov nqi ntawm cov tswv cuab: tus nqi ib feem + kev teeb tsa ua haujlwm + lub sijhawm ua haujlwm rau kev hloov pauv + cov khoom poob thaum lub sijhawm poob.
Kuv ua hauj lwm ntawm ib tug nruam caster yob nyob rau hauv ib tug steel zeb. Thawj bushings tau siv sijhawm li 6 lub lis piam nyob rau hauv qhov kub-kub, scale-laden ib puag ncig. Lub sijhawm poob los hloov lawv yog 12 teev, raug nqi rau rau tus lej hauv kev tsim khoom ploj. Peb hloov mus rau centrifugally cam khwb cia nickel-chromium-boron alloy bushing. Tus nqi tsev tau staggering. Tab sis lawv kav ntev dua 18 lub hlis. ROI tau suav hauv lub lis piam, tsis yog xyoo. Tus yuam sij tau ua pov thawj lub neej, uas yuav tsum tau ua ib qho kev sim me me thiab kev saib xyuas hauv qhov chaw nruj. Tsis muaj leej twg yuav cov no ntawm daim ntawv cog lus.
Qhov no yog qhov kev koom tes nrog cov chaw tsim khoom sib koom ua ke them nyiaj. Ib lub tuam txhab uas tuav cov casting, kho cua sov, thiab machining hauv tsev, zoo li cov haujlwm tau piav qhia ntawm QSY's facility, tuaj yeem muab kev kwv yees txhim khu kev qha ntau dua ntawm kev ua tau zoo thiab lub neej ntev vim tias lawv tswj tag nrho cov saw hlau sib txawv. Lawv kuj tau pom tias muaj dab tsi tshwm sim thaum lawv cov khoom raug thawb mus rau qhov txwv hauv thaj chaw, uas qhia txog cov txheej txheem tswj tau zoo dua rov qab rau hauv lub khw.
Xaus Tsis Muaj Kev Txiav Txim Siab
Tsis muaj qhov kawg ntawm no. Kev qhia tshwj xeeb thiab tsim kev txhim khu kev qha tshwj xeeb alloy bushing yog ib qho kev tawm dag zog hauv kev tswj hwm kev lag luam tawm thiab qhov txawv txav. Nws yog hais txog kev xaiv cov tsev neeg hlau zoo, tom qab ntawd kho cov txheej txheem casting thiab machining rau qhov tshwj xeeb alloy qhov quirks rau daim ntawv thov tshwj xeeb. Nws yog hais txog kev tsim lub system nyob ib ncig ntawm lub bushing, tsis yog lub bushing nyob rau hauv kev sib cais. Thiab nws yog hais txog kev nrhiav tus neeg tsim khoom uas nkag siab txog cov khoom siv tus cwj pwm los ntawm cov yaj mus rau qhov kawg txiav, leej twg tuaj yeem yog tus neeg sab laj, tsis yog tus neeg txiav txim xwb. Cov ntaub ntawv pov thawj yog qhov pib ntawm kev sib tham, tsis yog qhov kawg ntawm nws. Qhov tseeb spec yog sau nyob rau hauv qhov kev ua tau zoo ntawm lub Hoobkas pem teb, ntev tom qab qhov kev txiav txim yuav raug kaw.
