Yuav luag txhua txoj kev sib dhos ua ke tuaj yeem ua tiav tau ntau txoj hauv kev. Qhov kev xaiv uas tus neeg tsim khoom lossis tus neeg sib koom ua ke xaiv rau qhov txiaj ntsig zoo tshaj plaws feem ntau yog qhov uas phim cov thev naus laus zis uas tau lees paub rau ib daim ntawv thov tshwj xeeb.
Kev sib txhuam yog ib qho txheej txheem zoo li no. Kev sib txhuam yog ib qho txheej txheem sib txuas hlau uas ob lossis ntau qhov hlau raug sib txuas los ntawm kev yaj cov hlau sau thiab ntws nws mus rau hauv qhov sib koom ua ke. Cov hlau sau muaj qhov melting qis dua li cov hlau sib ze.
Cov cua sov rau brazing tuaj yeem muab los ntawm cov teeb, cov cub tawg lossis cov kauj induction. Thaum lub sijhawm induction brazing, lub kauj induction tsim lub zog sib nqus uas ua kom sov lub substrate kom yaj cov hlau filler. Induction brazing tau ua pov thawj tias yog qhov kev xaiv zoo tshaj plaws rau ntau qhov kev sib dhos.
"Kev siv induction brazing muaj kev nyab xeeb dua li kev siv lub teeb ci, sai dua li kev siv lub cub tawg, thiab rov ua dua ntau dua li ob qho tib si," said Steve Anderson, tus thawj coj ntawm kev tshawb fawb hauv thaj teb thiab kev sim ntawm Fusion Inc., tus neeg koom ua ke hnub nyoog 88 xyoo hauv Willoughby, Ohio Said, tshwj xeeb hauv ntau txoj kev sib dhos, suav nrog kev siv brazing. "Ntxiv mus, kev siv induction brazing yooj yim dua. Piv rau lwm ob txoj kev, txhua yam koj xav tau yog hluav taws xob txheem."
Ob peb xyoos dhau los, Fusion tau tsim lub tshuab ua haujlwm rau rau qhov chaw uas ua haujlwm tau zoo thiab siv tau rau txhua qhov chaw. Cov burrs no yog ua los ntawm kev txuas cov cylindrical thiab conical tungsten carbide blanks rau ntawm lub shank hlau. Tus nqi tsim khoom yog 250 qhov hauv ib teev, thiab lub tais sib cais tuaj yeem tuav tau 144 qhov blanks thiab cov cuab yeej tuav.
"Ib tug neeg hlau SCARA plaub-axis coj ib lub tes tuav los ntawm lub tais, nthuav tawm rau lub tshuab muab tshuaj nplaum, thiab thauj nws mus rau hauv lub zes gripper," piav qhia Anderson. "Tus neeg hlau ces coj ib daim dawb los ntawm lub tais thiab muab tso rau ntawm qhov kawg ntawm lub shank uas nws tau nplaum. Induction brazing yog ua tiav siv lub kauj hluav taws xob uas qhwv ntsug ncig ob qhov thiab coj cov hlau nyiaj filler mus rau qhov kub ntawm liquidus ntawm 1,305 F. Tom qab lub burr Cheebtsam tau sib dhos thiab txias, nws raug tso tawm los ntawm lub chute tso tawm thiab sau rau kev ua tiav ntxiv."
Kev siv induction brazing rau kev sib dhos yog nce ntxiv, feem ntau vim nws tsim kev sib txuas zoo ntawm ob qhov hlau thiab vim nws muaj txiaj ntsig zoo hauv kev koom ua ke cov ntaub ntawv sib txawv. Kev txhawj xeeb txog ib puag ncig, kev siv tshuab zoo dua, thiab cov ntawv thov tsis yog ib txwm muaj kuj yuam cov kws tsim khoom kom saib ze dua ntawm induction brazing.
Kev siv induction brazing tau muaj txij li xyoo 1950, txawm hais tias lub tswv yim ntawm kev siv induction cua sov (siv electromagnetism) tau tshawb pom ntau tshaj ib puas xyoo dhau los los ntawm tus kws tshawb fawb Askiv Michael Faraday. Cov teeb tes yog thawj qhov chaw cua sov rau brazing, ua raws li cov cub tawg hauv xyoo 1920. Thaum Tsov Rog Thoob Ntiaj Teb Zaum Ob, cov txheej txheem siv rau hauv cub tawg feem ntau siv los tsim cov khoom hlau ntau nrog kev ua haujlwm thiab kev siv nyiaj tsawg.
Cov neeg siv khoom xav tau cua txias hauv xyoo 1960 thiab 1970 tau tsim cov ntawv thov tshiab rau kev siv induction brazing. Qhov tseeb, kev siv cov txhuas ua ke ntau heev thaum xyoo 1970 lig ua rau muaj ntau yam khoom siv pom hauv cov tshuab cua txias hauv tsheb niaj hnub no.
"Tsis zoo li lub teeb brazing, induction brazing yog tsis sib cuag thiab txo qhov kev pheej hmoo ntawm overheating," sau tseg Rick Bausch, tus thawj tswj kev muag khoom rau Ambrell Corp., inTEST.temperature.
Raws li Greg Holland, tus thawj tswj kev muag khoom thiab kev ua haujlwm ntawm eldec LLC, lub kaw lus induction brazing txheem muaj peb yam khoom. Cov no yog lub zog muab hluav taws xob, lub taub hau ua haujlwm nrog lub kauj induction thiab lub tshuab txias lossis lub kaw lus txias.
Lub hwj chim muab hluav taws xob txuas nrog lub taub hau ua haujlwm thiab cov kauj vuam tau tsim tshwj xeeb kom haum rau ib puag ncig qhov sib koom ua ke. Cov inductors tuaj yeem ua los ntawm cov pas nrig khov kho, cov xov hlau yooj ywm, cov billets machined, lossis 3D luam tawm los ntawm cov hmoov tooj liab alloys. Feem ntau, txawm li cas los xij, nws yog ua los ntawm cov raj tooj liab hollow, uas dej ntws los ntawm ntau yam laj thawj. Ib qho yog kom lub kauj vuam txias los ntawm kev tawm tsam cov cua sov cuam tshuam los ntawm cov khoom thaum lub sijhawm brazing. Cov dej ntws kuj tiv thaiv cov cua sov tsim hauv cov kauj vuam vim muaj ntau zaus ntawm alternating tam sim no thiab ua rau cov cua sov tsis zoo.
"Qee zaum lub tshuab flux concentrator raug muab tso rau ntawm lub kauj kom txhawb lub zog ntawm lub zog magnetic ntawm ib lossis ntau qhov chaw hauv qhov sib koom ua ke," Holland piav qhia. "Cov concentrators no tuaj yeem yog hom laminate, muaj cov hlau hluav taws xob nyias nyias sib dhos ua ke, lossis cov raj ferromagnetic uas muaj cov khoom siv ferromagnetic hmoov thiab cov dielectric bonds compressed nyob rau hauv siab siab. Siv ib qho twg Qhov txiaj ntsig ntawm lub concentrator yog tias nws txo lub sijhawm voj voog los ntawm kev coj ntau lub zog mus rau hauv cov cheeb tsam tshwj xeeb ntawm qhov sib koom ua ke sai dua, thaum ua kom lwm qhov chaw txias dua."
Ua ntej muab cov khoom hlau tso rau hauv qhov chaw rau kev siv induction brazing, tus neeg teb xov tooj yuav tsum teeb tsa qhov zaus thiab qib zog ntawm lub kaw lus kom raug. Qhov zaus tuaj yeem yog txij li 5 txog 500 kHz, qhov zaus siab dua, qhov ceev dua qhov chaw kub.
Cov khoom siv fais fab feem ntau muaj peev xwm tsim tau ntau pua kilowatts ntawm hluav taws xob. Txawm li cas los xij, kev sib tsoo ib qho me me ntawm xib teg hauv 10 txog 15 vib nas this tsuas yog xav tau 1 txog 5 kilowatts xwb. Piv txwv li, cov khoom loj tuaj yeem xav tau 50 txog 100 kilowatts ntawm lub zog thiab siv sijhawm txog 5 feeb los sib tsoo.
"Raws li txoj cai dav dav, cov khoom me me siv zog tsawg dua, tab sis xav tau cov zaus siab dua, xws li 100 txog 300 kilohertz," Bausch hais. "Qhov sib piv, cov khoom loj dua xav tau lub zog ntau dua thiab cov zaus qis dua, feem ntau qis dua 100 kilohertz."
Txawm lawv loj npaum li cas los xij, cov khoom hlau yuav tsum tau muab tso rau qhov chaw kom raug ua ntej raug khi. Yuav tsum tau ceev faj kom muaj qhov sib txawv ntawm cov hlau tseem ceeb kom cov hlau ntws tau zoo. Cov pob qij txha ntawm lub pob tw, lub duav thiab lub pob tw yog txoj hauv kev zoo tshaj plaws los xyuas kom meej qhov kev sib nrug no.
Cov khoom siv ib txwm muaj los yog cov khoom siv uas kho tau nws tus kheej yeej siv tau. Cov khoom siv ib txwm muaj yuav tsum ua los ntawm cov khoom siv uas tsis muaj hluav taws xob ntau xws li hlau tsis xeb los yog ceramic, thiab kov cov khoom me me li sai tau.
Los ntawm kev tsim cov khoom nrog cov seams interlocking, swaging, depressions lossis knurls, kev kho tus kheej tuaj yeem ua tiav yam tsis tas yuav tsum tau kev txhawb nqa tshuab.
Tom qab ntawd, cov pob qij txha yuav raug ntxuav nrog daim ntaub emery lossis cov tshuaj yaj kom tshem tawm cov khoom tsis huv xws li roj, roj, xeb, nplai thiab av qias neeg. Cov kauj ruam no ua rau cov hlau molten rub nws tus kheej los ntawm cov nplaim sib ze ntawm qhov sib koom ua ke.
Tom qab cov khoom raug teeb tsa thiab ntxuav kom huv si lawm, tus neeg teb xov tooj muab cov tshuaj sib txuas (feem ntau yog cov nplaum) rau ntawm qhov sib txuas. Cov tshuaj no yog cov hlau sib xyaw, cov kua nplaum (kom tiv thaiv kev oxidation) thiab cov khoom sib txuas uas tuav cov hlau thiab cov kua nplaum ua ke ua ntej yaj.
Cov hlau filler thiab cov fluxes siv rau hauv brazing yog tsim los tiv taus qhov kub siab dua li cov uas siv rau hauv soldering. Cov hlau filler siv rau brazing yaj ntawm qhov kub tsawg kawg 842 F thiab muaj zog dua thaum txias. Lawv suav nrog txhuas-silicon, tooj liab, tooj liab-nyiaj, tooj dag, tooj dag, kub-nyiaj, nyiaj, thiab nickel alloys.
Tus neeg teb xov tooj mam li tso lub kauj induction, uas muaj ntau yam qauv tsim. Cov kauj helical yog puag ncig lossis oval hauv cov duab thiab puag ncig tag nrho qhov, thaum cov kauj fork (lossis pincer) nyob rau ntawm txhua sab ntawm qhov sib koom ua ke thiab cov kauj channel txuas rau ntawm qhov. Lwm cov kauj suav nrog Sab Hauv Txoj Kab uas hla (ID), ID / Sab Nraud Txoj Kab uas hla (OD), Pancake, Qhib, thiab Ntau Txoj Haujlwm.
Qhov kub sib xws yog qhov tseem ceeb rau kev sib txuas brazed zoo. Txhawm rau ua qhov no, tus neeg teb xov tooj yuav tsum xyuas kom meej tias qhov nrug ntsug ntawm txhua lub voj voog induction yog me me thiab qhov deb ntawm kev sib txuas (qhov dav ntawm lub kauj OD mus rau ID) tseem zoo ib yam.
Tom ntej no, tus neeg teb xov tooj yuav qhib lub hwj chim kom pib ua kom lub pob qij sov. Qhov no suav nrog kev hloov pauv sai sai ntawm cov hluav taws xob mus rau lub inductor los tsim ib lub zog sib nqus hloov pauv nyob ib puag ncig nws.
Lub zog sib nqus ua rau muaj hluav taws xob nyob rau saum npoo ntawm qhov sib koom ua ke, uas tsim kom muaj cua sov los yaj cov hlau filler, cia nws ntws thiab ntub cov hlau nto, tsim kom muaj kev sib txuas zoo. Siv ntau txoj haujlwm coils, cov txheej txheem no tuaj yeem ua tiav rau ntau qhov tib lub sijhawm.
Kev ntxuav thiab tshuaj xyuas zaum kawg ntawm txhua qhov khoom siv brazed yog qhov pom zoo. Ntxuav cov khoom nrog dej kub tsawg kawg 120 F yuav tshem tawm cov seem flux thiab txhua qhov nplai tsim thaum lub sijhawm brazing. Cov khoom yuav tsum tau muab tso rau hauv dej tom qab cov hlau filler tau khov tab sis lub rooj sib dhos tseem kub.
Nyob ntawm qhov khoom, kev tshuaj xyuas tsawg kawg nkaus tuaj yeem ua raws li kev sim tsis puas tsuaj thiab kev puas tsuaj. Cov txheej txheem NDT suav nrog kev tshuaj xyuas pom thiab radiographic, nrog rau kev sim xau thiab pov thawj. Cov txheej txheem sim kev puas tsuaj feem ntau yog metallographic, peel, tensile, shear, fatigue, transfer, thiab torsion testing.
"Kev siv induction brazing yuav tsum tau siv nyiaj ntau dua li txoj kev siv lub teeb, tab sis nws tsim nyog vim tias koj tau txais kev ua haujlwm zoo dua thiab kev tswj hwm," Holland hais. "Nrog induction, thaum koj xav tau cua sov, koj tsuas yog nias. Thaum koj tsis xav tau, koj nias."
Eldec tsim ntau yam khoom siv fais fab rau kev siv induction brazing, xws li ECO LINE MF intermediate frequency line, uas muaj ntau yam kev teeb tsa kom haum rau txhua daim ntawv thov. Cov khoom siv fais fab no muaj nyob rau hauv kev ntsuas fais fab txij li 5 txog 150 kW thiab zaus txij li 8 txog 40 Hz. Txhua tus qauv tuaj yeem nruab nrog lub zog txhawb nqa uas tso cai rau tus neeg teb xov tooj kom nce 100% kev ua haujlwm tas mus li los ntawm ntxiv 50% hauv 3 feeb. Lwm yam ntxwv tseem ceeb suav nrog pyrometer kub tswj, ntsuas kub thiab insulated gate bipolar transistor fais fab hloov. Cov khoom siv no xav tau kev saib xyuas me ntsis, ua haujlwm ntsiag to, muaj qhov chaw me me, thiab yooj yim koom ua ke nrog cov tswj hwm workcell.
Cov chaw tsim khoom hauv ntau lub lag luam tab tom siv induction brazing los sib sau ua ke cov khoom. Bausch taw qhia rau cov chaw tsim khoom tsheb, aerospace, khoom siv kho mob thiab cov khoom siv mining ua cov neeg siv loj tshaj plaws ntawm Ambrell induction brazing khoom siv.
"Tus naj npawb ntawm cov khoom siv induction brazed aluminium hauv kev lag luam tsheb txuas ntxiv nce ntxiv vim yog kev txo qhov hnyav," Bausch taw qhia. "Hauv kev lag luam aerospace, nickel thiab lwm hom hnav pads feem ntau yog brazed rau jet blades. Ob qho kev lag luam kuj induction brazed ntau yam steel yeeb nkab fittings."
Tag nrho rau lub tshuab Ambrell's EasyHeat muaj ntau zaus ntawm 150 txog 400 kHz thiab zoo tagnrho rau kev siv induction brazing ntawm cov khoom me me ntawm ntau yam geometries. Cov compacts (0112 thiab 0224) muab kev tswj hwm lub zog hauv 25 watts kev daws teeb meem; cov qauv hauv LI series (3542, 5060, 7590, 8310) muab kev tswj hwm hauv 50 watts kev daws teeb meem.
Ob qho tib si muaj lub taub hau ua haujlwm uas tshem tau txog li 10 feet ntawm lub zog fais fab. Lub kaw lus lub vaj huam sib luag pem hauv ntej tuaj yeem teeb tsa tau, tso cai rau tus neeg siv kawg los txhais txog plaub qhov sib txawv ntawm cov qauv cua sov, txhua tus muaj txog li tsib lub sijhawm thiab cov kauj ruam fais fab. Kev tswj hwm fais fab deb muaj rau kev sib cuag lossis analog input, lossis xaiv tau serial data port.
"Peb cov neeg siv khoom tseem ceeb rau kev siv induction brazing yog cov chaw tsim khoom ntawm cov khoom uas muaj qee cov pa roj carbon, lossis cov khoom loj uas muaj feem pua ​​​​​​ntawm cov hlau," piav qhia Rich Cukelj, Fusion Business Development Manager. "Qee lub tuam txhab no pabcuam rau kev lag luam tsheb thiab aerospace, thaum lwm tus ua phom, txiav cov cuab yeej sib dhos, cov kais dej thiab cov kav dej, lossis cov khoom faib hluav taws xob thiab fuses."
Fusion muag cov tshuab rotary uas tuaj yeem ua kom induction braze 100 txog 1,000 qhov hauv ib teev. Raws li Cukelj, cov txiaj ntsig siab dua tuaj yeem ua tau rau ib hom ntawm ib feem lossis rau ib qho tshwj xeeb ntawm cov khoom. Cov khoom no muaj qhov loj me ntawm 2 txog 14 square inches.
"Txhua lub tshuab muaj ib lub indexer los ntawm Stelron Components Inc. nrog 8, 10 lossis 12 lub chaw ua haujlwm," Cukelj piav qhia. "Qee lub chaw ua haujlwm siv rau kev sib txhuam, thaum lwm tus siv rau kev tshuaj xyuas, siv cov koob yees duab pom kev lossis cov cuab yeej ntsuas laser, lossis ua qhov kev sim rub kom ntseeg tau tias cov pob qij txha zoo."
Cov chaw tsim khoom siv eldec tus qauv ECO LINE fais fab mov rau ntau yam kev siv induction brazing, xws li shrink-fitting rotors thiab shafts, lossis koom nrog lub cev muaj zog, Holland tau hais. Tsis ntev los no, tus qauv 100 kW ntawm lub tshuab hluav taws xob no tau siv rau hauv daim ntawv thov loj uas cuam tshuam nrog brazing tooj liab circuit rings rau tooj liab kais txuas rau cov tshuab hluav taws xob hydroelectric.
Eldec kuj tsim cov khoom siv fais fab MiniMICO uas yooj yim nqa tau uas tuaj yeem txav mus los tau yooj yim hauv lub Hoobkas nrog ntau zaus ntawm 10 txog 25 kHz. Ob xyoos dhau los, ib lub tuam txhab tsim cov raj xa cua sov hauv tsheb tau siv MiniMICO los ua kom cov luj tshib rov qab mus rau txhua lub raj. Ib tus neeg ua txhua qhov kev sib txhuam, thiab nws siv sijhawm tsawg dua 30 vib nas this los sib sau ua ke txhua lub raj.
Jim yog ib tug kws kho xov xwm laus ntawm ASSEMBLY nrog ntau tshaj 30 xyoo ntawm kev paub txog kev kho xov xwm. Ua ntej koom nrog ASSEMBLY, Camillo yog PM Engineer, editor ntawm Association for Equipment Engineering Journal thiab Milling Journal. Jim muaj daim ntawv kawm tiav qib siab hauv lus Askiv los ntawm DePaul University.
Xa Daim Ntawv Thov Kev Pom Zoo (RFP) rau tus neeg muag khoom uas koj xaiv thiab nyem lub pob uas qhia txog koj cov kev xav tau
Xauj peb phau ntawv qhia rau cov neeg yuav khoom kom nrhiav tau cov neeg muab khoom ntawm txhua hom kev sib dhos, cov tshuab thiab cov txheej txheem, cov neeg muab kev pabcuam thiab cov koom haum lag luam.
Lean Six Sigma tau tsav tsheb kev txhim kho tas mus li tau ntau xyoo lawm, tab sis nws qhov tsis zoo tau pom tseeb. Kev sau cov ntaub ntawv yog siv zog ntau thiab tsuas yog tuaj yeem ntes cov qauv me me xwb. Tam sim no cov ntaub ntawv tuaj yeem ntes tau ntev thiab nyob rau ntau qhov chaw ntawm tus nqi qis dua li cov txheej txheem qub.
Cov neeg hlau pheej yig dua thiab yooj yim siv dua li yav tas los. Cov thev naus laus zis no yooj yim siv txawm tias rau cov chaw tsim khoom me thiab nruab nrab. Mloog cov lus sib tham tshwj xeeb no uas muaj cov thawj coj los ntawm plaub lub tuam txhab muag khoom siv neeg hlau zoo tshaj plaws hauv Asmeskas: ATI Industrial Automation, Epson Robots, FANUC America, thiab Universal Robots.