Nyob rau hauv cov xov xwm kawg, ib txoj kev tsim ntawm loj-loj sawb ultrasonic yas welding slotted sib koom tau thov thiab txheeb xyuas los ntawm kev sim.Ua ntej, lub sawb vuam horn yog tsim nyog muab faib ua ob peb chav nyob kom qhov tsim ntawm slotted vuam horn nrog complex qauv yog hloov mus rau hauv tus tsim ntawm yooj yim vuam horn chav tsev.Tom qab ntawd cov khoom sib koom yog muab piv nrog ib nrab nthwv dej oscillator nrog seem sib npaug xav txog kev co coupling.Qhov sib npaug zaus ntawm qhov sib koom ua ke yog tau los ntawm kev siv lub tswv yim ntawm qhov sib npaug ntawm cov neeg kho tshuab impedance.
Thaum kawg, qhov cuam tshuam ntawm tus lej, qhov dav thiab qhov ntev ntawm qhov kev co ntawm cov pob qij txha tau kawm los ntawm kev siv qhov sib npaug.Raws li txoj kev no, ob peb pawg loj loj sawb grooves tau tsim thiab machined.Cov txiaj ntsig kev sim qhia tau hais tias qhov ntsuas thiab theoretical qhov tseem ceeb ntawm qhov resonance zaus ntawm cov pob qij txha welded yog pom zoo.
Raws li pom hauv daim duab hauv qab no.Qhov ntev, dav thiab thickness ntawm lub vuam horn yog L, B thiab T raws.Piv txwv li z axis raws li cov kev taw qhia excitation ntawm lub transducer.Ntawm qhov ua haujlwm zaus, lub voj voos vuam sib txuas yuav tsim thawj qhov kev txiav txim siab ntev ntawm Z kev taw qhia.Rau sawb vuam cov pob qij txha, L≥2T, B thiab L tuaj yeem sib piv, yog li qhov kev vibration ntawm cov vuam pob qij txha hauv X kev taw qhia tuaj yeem tsis quav ntsej.
Vim hais tias lub transverse vibration nyob rau hauv y kev taw qhia muaj kev cuam tshuam zoo rau lub longitudinal kev co, nws yog feem ntau simulated los ntawm slotting.Lub vuam horn yog muab faib ua (n + 1) units los ntawm uniformly qhib n qhov nyob rau hauv Y kev taw qhia.Qhov dav thiab qhov ntev ntawm txhua qhov yog W thiab L2 raws li qhov sib txawv, thiab cov khoom sib cais los ntawm cov tswv yim thiab cov zis kawg ntawm lub vuam horn l1 thiab L3 feem.Txhawm rau kom ntseeg tau tias txhua chav nyob sib npaug tag nrho, grooves ntawm qhov dav W / 2 yuav tsum tau qhib rau ntawm ob qho kawg ntawm txoj hlua txuas txuas.Yog li, txhua qhov vuam pwm chav tsev yog qhov sib xyaw trapezoidal horn nrog cov duab plaub.Piv txwv tias qhov dav ntawm ob qho kawg thiab hauv nruab nrab ntawm txhua chav yog D1 thiab D2, nws tuaj yeem pom los ntawm cov saum toj no: L = L1 + L2 + L3
Vim yog cov qauv zoo ib yam ntawm cov ntsiab lus, qhov tso zis amplitude ntawm lub vuam yuav kuj vibrate tus qauv, thiab thaum ua ke, lub ultrasonic horn kuj yuav muaj cov qauv no, thiaj li hais tias tus tsim ntawm ultrasonic pwm yuav yooj yim rau kev tsim ntawm tej keeb.Tsis tas li ntawd, nws yog qhov sib xws.Txhawm rau kom muaj txiaj ntsig zoo ntawm kev cuam tshuam kev vibration thiab xyuas kom meej tias lub vuam horn muaj qhov ruaj khov, qhov dav ntawm vuam horn chav faib los ntawm qhov zawj yog feem ntau nyob rau hauv!/ 8 ~!/ 4 (! Yog lub wavelength ntawm thawj-txiav longitudinal vibration hom ntawm vuam horn), thiab qhov zoo tagnrho dav ntawm lub qhov yog hais txog!/ 25 ~ ib!/20[7], tus naj npawb grooving ntawm vuam pob qij txha tuaj yeem txiav txim siab raws li cov txheej txheem saum toj no.Vim tias qhov dav ntawm lub vuam horn feem ntau tsis tshaj!PI / 4, yog li nws tuaj yeem kwv yees kwv yees los ntawm ib qho kev tshawb xav.Txhua qhov vuam chav nyob hauv chav tsev 1 tuaj yeem suav tau tias muaj peb lub voj voos equisectional.
Aluminium alloy 7075 (Young's modulus E = 7.17 * 1010N / M2 ceev ρ = 2820kg / m3, Poisson tus piv V = 0.34) raug xaiv rau vuam horn.Qhov sib npaug (1) ~ (3) thiab (6) tau siv los xam tus lej n, ntev L2 thiab dav W ntawm qhov sib txawv.Thaum lub resonant ntev L ntawm lub sawb vuam horn hloov nrog lub dav B, lub resonant ntev L ntawm lub sawb vuam horn hloov nrog lub dav B. Qhov xam resonant zaus f = 20kHz, L1 = L3 rau simplicity.Thaum lub qhov ntev thiab qhov dav yog qhov tas li, qhov ntev resonant hloov nrog lub vuam horn dav thaum tus lej qhov sib txawv.L2 = 60 mm, W = 10 mm.Raws li tau pom los ntawm FIG.2, rau qhov slotted vuam horn qhia hauv FIG.1, qhov kev txiav txim thawj zaug resonance ntev yog me dua li ntawm qhov tsis muaj qhov vuam horn xam raws li qhov kev xav ntawm ib sab (126mm), thiab qhov ntev ntawm lub vuam horn nce nrog qhov nce ntawm qhov dav ntawm vuam horn, tab sis nce zuj zus zuj zus.Tsis tas li ntawd, thaum lub resonant zaus thiab weld dav yog tas mus li, lub resonant ntev ntawm weld txo qis nrog qhov nce ntawm tus lej.
Tsis tas li ntawd, peb welded pob qij txha ntawm txawv tuab tau machined nrog aluminium alloy 7075 (tib yam khoom raws li saum toj no).Lub thickness T ntawm peb welded pob qij txha thiab ntsuas kev sib haum xeeb vibration zaus FM tau muab.Thaum lub vuam horn thickness tsawg tshaj li ib feem peb ntawm lub wavelength (ntawm no yog 63 hli), qhov sib txawv ntawm qhov ntsuas zaus thiab tus qauv tsim yog tsawg dua 2%, uas tuaj yeem ua tau raws li cov kev cai ntawm kev siv engineering.
Qhov ntev strip ultrasonic yas vuam sib koom ua ke tau tsim nyog muab faib ua ntau yam sib npaug thiab qhov sib npaug zaus ntawm cov khoom sib koom tau txiav tawm los ntawm kev hloov matrix.Yog tias qhov dav thiab qhov ntau thiab qhov loj ntawm lub qhov yog paub, qhov sib npaug tuaj yeem siv los tsim cov sawb sib koom ua ke yooj yim, yog li muab lub hauv paus theoretical rau kev tsim cov sawb sib koom ua ke.Daim ntawv no tseem tshuaj xyuas qhov cuam tshuam ntawm tus lej, qhov dav thiab qhov ntev ntawm qhov sib koom ua ke loj los ntawm cov piv txwv.Nws tuaj yeem pom tau tias txoj kev no kuj muaj qee yam cuam tshuam rau kev tsim kho kom zoo ntawm kev sib koom ua ke
Split groove tom qab sawb vuam horn vibration tsom xam, lub vuam horn yuav muab faib mus rau hauv lub kawg chav tsev lub cev thiab nruab nrab chav tsev cell, siv cov txheej txheem ntawm pom meej elasticity txoj kev thiab cov nyhuv ntawm kis kab mob, qhov ntev ntawm plaub txawv units yog muab raws li thiab cov kev taw qhia ntawm qhov siab ntawm qhov sib npaug ntawm qhov sib npaug, qhov sib npaug zaus tuaj yeem siv los tsim qhov ntev bar vuam horn, tab sis cov txheej txheem tsim yog qhov nyuaj, Kev xaiv ntawm qee qhov tsis zoo nyob ntawm kev paub dhau los thiab tsis yooj yim rau kev siv engineering.Nyob rau hauv cov ntaub ntawv no, lub sawb vuam sib txuas yog muab faib ua ob peb qhov sib npaug ntawm qhov tsim nyog slotting, thiab qhov sib npaug zaus ntawm cov vuam sib txuas yog tau los ntawm txoj kev hloov matrix, uas muab lub hauv paus theoretical rau kev tsim cov sawb vuam sib txuas.Tus qauv tsim muaj qhov yooj yim theoretical xam thiab pom tseeb lub cev lub ntsiab lus, uas muab ib qho yooj yim thiab yooj yim txoj kev rau engineering tsim ntawm sawb
vuam kev sib koom tes.
Post lub sij hawm: Mar-17-2022