Beryllium tooj liab muaj qis resistivity, siab dua thermal conductivity thiab coefficient ntawm expansion dua hlau.Zuag qhia tag nrho, beryllium tooj liab muaj tib yam lossis siab zog dua li cov hlau.Thaum siv qhov chaw vuam (RSW) beryllium tooj liab nws tus kheej los yog beryllium tooj liab thiab lwm yam alloys, siv cov vuam tam sim no ntau dua, (15%), qis voltage (75%) thiab luv vuam lub sij hawm (50%).Beryllium tooj liab tiv taus cov vuam siab dua li lwm cov tooj liab alloys, tab sis cov teeb meem kuj tuaj yeem tshwm sim los ntawm kev kub siab uas qis dhau.
Yuav kom tau txais cov txiaj ntsig zoo sib xws hauv cov khoom siv tooj liab, cov khoom siv vuam yuav tsum muaj peev xwm tswj tau lub sijhawm thiab tam sim no, thiab AC vuam cov cuab yeej yog qhov nyiam vim nws qhov kub thiab txias ntawm electrode.Vuam lub sij hawm ntawm 4-8 cycles ua tau zoo dua.Thaum welding hlau nrog zoo sib xws expansion coefficients, qaij vuam thiab overcurrent welding tuaj yeem tswj qhov nthuav dav ntawm cov hlau kom txwv tsis pub muaj kev phom sij ntawm vuam tawg.Beryllium tooj liab thiab lwm yam tooj liab alloys yog welded tsis tilting thiab overcurrent vuam.Yog hais tias inclined welding thiab overcurrent welding yog siv, tus naj npawb ntawm lub sij hawm nyob ntawm seb lub thickness ntawm lub workpiece.
Nyob rau hauv qhov chaw tsis kam vuam beryllium tooj liab thiab hlau, los yog lwm yam hlau tsis kam, zoo thermal tshuav nyiaj li cas tuaj yeem tau los ntawm kev siv electrodes nrog me me ntawm qhov chaw ntawm beryllium tooj liab sab.Cov khoom siv electrode nyob rau hauv kev sib cuag nrog beryllium tooj liab yuav tsum muaj ib tug siab conductivity tshaj lub workpiece, ib tug RWMA2 pab pawg neeg qib electrode yog haum.Refractory hlau electrodes (tungsten thiab molybdenum) muaj cov ntsiab lus melting siab heev.Tsis muaj qhov xav tau los lo rau beryllium tooj liab.13 thiab 14 ncej electrodes kuj muaj.Qhov zoo ntawm cov hlau refractory yog lawv lub neej ua haujlwm ntev.Txawm li cas los xij, vim qhov hardness ntawm xws li alloys, qhov chaw puas tuaj yeem ua tau.Dej-txias electrodes yuav pab tswj qhov kub thiab txias lub neej ntawm electrode.Txawm li cas los xij, thaum vuam ntu nyias ntawm beryllium tooj liab, kev siv cov dej txias electrodes tuaj yeem ua rau quenching ntawm cov hlau.
Yog hais tias lub thickness sib txawv ntawm beryllium tooj liab thiab siab resistivity alloy yog ntau tshaj 5, projection welding yuav tsum tau siv vim qhov nyuaj ntawm practicable thermal tshuav nyiaj li cas.
Resistance projection vuam
Ntau qhov teeb meem ntawm beryllium tooj liab nyob rau hauv qhov chaw welding tuaj yeem daws tau nrog kev ua haujlwm vuam (RPW).Vim nws qhov chaw me me thaum tshav kub kub cuam tshuam, ntau yam haujlwm tuaj yeem ua tau.Cov hlau sib txawv ntawm cov thicknesses sib txawv yog yooj yim rau vuam.Dav hla ntu electrodes thiab ntau cov duab electrode yog siv los tiv thaiv qhov projection vuam kom txo tau deformation thiab ua raws.Electrode conductivity yog qhov teeb meem tsawg dua nyob rau hauv qhov chaw welding.Feem ntau siv yog 2, 3, thiab 4 ncej electrodes;qhov nyuaj ntawm electrode, lub neej ntev.
Softer tooj liab alloys tsis dhau kev tiv thaiv qhov projection vuam, beryllium tooj liab muaj zog txaus los tiv thaiv lub pob tawg ntxov ntxov thiab muab qhov ua tiav zoo heev.Beryllium tooj liab kuj tuaj yeem ua qhov projection welded ntawm thicknesses hauv qab 0.25mm.Raws li nrog rau qhov chaw vuam, cov khoom siv AC feem ntau yog siv.
Thaum cov hlau tsis sib xws, cov pob yog nyob rau hauv cov khoom siv hluav taws xob ntau dua.Beryllium tooj liab yog malleable txaus rau xuas nrig ntaus los yog extrude yuav luag txhua tus duab convex.Xws li cov duab ntse heev.Lub beryllium tooj liab workpiece yuav tsum tau tsim ua ntej kev kho cua sov kom tsis txhob tawg.
Zoo li qhov chaw vuam tsis kam, beryllium tooj liab kuj projection vuam txheej txheem ib txwm xav tau ntau dua amperage.Lub hwj chim yuav tsum tau siv tam sim ntawd thiab siab txaus kom ua rau lub protrusion yaj ua ntej nws tawg.Vuam siab thiab lub sij hawm raug kho los tswj lub pob tawg.Vuam siab thiab lub sij hawm kuj nyob ntawm pob geometry.Lub siab tawg yuav txo qhov tsis xws ntawm vuam ua ntej thiab tom qab vuam.