Hom vuam ultrasonic hla teeb meem thiab kev daws teeb meem
Lub hauv paus ntsiab lus ntawm ultrasonic vuam yog los hloov cov hluav taws xob high-frequency hluav taws xob rau hauv high-frequency vibration mechanical lub zog. Qhov kev co hluav taws xob no yog kis mus rau lub thermoplastic lossis hlau, thiab kev sib txhuam thiab kub yog tsim los ntawm kev sib cuam tshuam ntawm cov yas thiab yas, yas thiab hlau, lossis hlau thiab hlau.
Hauv ultrasonic vuam, kev sib txhuam ua kom muaj cua sov ua rau fuse ob qhov chaw ua ke. Hauv ultrasonic riveting, lub taub hau vuam tswj kev khiav ntawm molten yas, tsim thiab nias qhov chaw. Hauv ultrasonic txiv ntoo mounting, lub taub hau vuam tsav cov hlau txiv ntseej rau hauv cov yas.
Lub kaw lus ultrasonic muaj ntau txoj kev xaiv tsim, suav nrog ntau zaus (15Khz-50Khz), txawv zog (600W-4800W), thiab ntau hom ntawv, xws li pneumatic ultrasonic vuam tshuab, servo ultrasonic vuam tshuab, lub tshuab ua viav vias, tsis yog- txheem vuam tshuab, Hlau ultrasonic vuam tshuab thiab li ntawm.
Muaj ntau ntau yam uas cuam tshuam rau kev ua tiav ntawm ultrasonic vuam: pwm (nrog rau lub vuam sab saud thiab qis qis pwm), ntau zaus, cov khoom siv, tsim qauv weld, vuam tsis, thiab txhaj tshuaj molding ntawm qhov chaw. Hauv tsab xov xwm no, peb qhia 5 lub ntsiab.
1. Vuam qhov system zaus
Qhov ntau zaus ntawm kev ntsuas vuam ultrasonic yog 15Khz, 20Khz, 30Khz, 35Khz thiab 40Khz. Nws yog ib qho tsim nyog los xaiv qhov tsim nyog vuam viav raws li qhov yuav tsum tau ua ntawm cov khoom loj, sab hauv cov hom, qhov muaj zog thiab tsos. Feem ntau, koj tuaj yeem xa mus rau cov ntsiab cai hauv qab no:
Rau cov khoom me me thiab meej hauv cov khoom siv hluav taws xob (suav nrog PCB pawg thiab cov tshuab hluav taws xob me me) lub plhaub vuam, siv lub siab siv 40Khz vuam tshuab. 40Khz vuam tshuab muaj qhov me dua thiab tsawg dua vuam kev ua haujlwm, uas tuaj yeem zam kev puas tsuaj rau cov khoom siv hluav taws xob sab hauv ntawm cov khoom.
Rau cov khoom me me uas yuav tsum muaj cov tsos ntawm Class A nto. Nws yog welded los ntawm lub tshuab vuam 40Khz, uas tuaj yeem txhim kho qhov zoo vim yog qhov me me thiab qhov siab.
Rau lub tshuab vuam ntawm nruab nrab thiab loj qhov loj me, siv qhov tsawg zaus 15Khz lossis 20Khz vuam tshuab.
Rau cov khoom siv softer xws li PP, thiab cov phab ntsa-cov khoom lag luam uas tsis tshua muaj qhov tsis zoo, 15Khz vuam tshuab nrog tsawg zaus thiab qhov loj dav yog siv rau vuam.
Txog rau daim teb vuam, uas yog, lub taub hau vuam yog nyob deb ntawm vuam vuam, piv txwv li, thaum nws loj dua 12 hli, lub tshuab vuam 15Khz nrog tsawg zaus thiab qhov loj siv tau rau vuam.
Lub cav 20Khz vuam yog tsim rau vuam feem ntau cov khoom ntawm me me mus rau nruab nrab qhov loj me, thiab tseem yog qhov feem ntau siv ultrasonic zaus.
2. Cov Khoom Siv
Txog rau ultrasonic vuam ntawm cov yas, nws tsuas yog haum rau vuam thermoplastics. Vim tias lawv tuaj yeem yaj nyob rau hauv ntau hom kub. Thermosetting plasma degrade thaum kho kom sov thiab tsis tuaj yeem siv los ntawm ultrasonic.
Lub weldability ntawm thermoplastics yog nyob ntawm cov khoom siv txhav lossis elastic modulus, ntom ntom, coefficient ntawm kev sib txhuam, thermal conductivity, meej muaj peev xwm kub, iav hloov kub Tg lossis melting kub Tm.
Feem ntau hais lus, txoj hlua khi ua kom pom zoo tshaj qhov qub txuas vuam kev ua tau zoo vim tias lawv tau yooj yim dua rau xa lub zog kev co. Txawm li cas los xij, cov mos mos uas muaj cov ntaub ntawv qis elastic yog qhov nyuaj rau weld vim lawv attenuate ultrasonic kev co. Qhov fab ntxeev yog qhov tseeb rau ultrasonic riveting lossis chaw welding. Lub softer yas, qhov yooj yim dua nws yog rau riveting lossis chaw welding.
Feem ntau, plastics tuaj yeem muab faib ua ob hom: cov tsis muaj crystalline (amorphous) thiab crystalline. Ultrasonic zog yog yooj yim kis hauv cov ntaub ntawv amorphous, yog li amorphous plastics yooj yim rau ultrasonic welding. Lub zog ultrasonic tsis yooj yim kis hauv cov ntaub ntawv crystalline, yog li ntau dua qhov ntau thiab lub zog xav tau thaum vuam crystalline plastics, thiab lub weld yuav tsum ua tib zoo tsim.
Lub hauv paus ntsiab lus uas tuaj yeem cuam tshuam txog kev muag khoom suav nrog noo noo cov ntsiab lus, cov khoom tso tawm pwm, roj nplua nyeem, hnab yas, txau ua kom zoo dua, pigments, nplaim taws rov qab thiab lwm yam ntxiv, nrog rau cov qib cob qhia. Ntxiv rau, nws yuav tsum raug sau tseg tias qib ntawm kev sib raug zoo ntawm cov ntaub ntawv sib txawv. Qee cov ntaub ntawv muaj qee qib kev sib txawv ntawm qib tshwj xeeb, thaum lwm tus tsis sib xws.
Thaum kawg, xav seb daim hlau puas nyob ze-teb vuam lossis nyob deb teb vuam. Thaum qhov kev ncua deb ntawm vuam taub hau mus rau vuam vuam tsawg dua 6 hli, nws yog hu ua ze rau vuam teb. Loj tshaj 6mm' yog hu ua kev xa xov deb. Qhov ntau dua qhov kev ncua deb, ntau dua qhov kev co ntawm kev co thiab muaj qhov nyuaj ntxiv rau lub vuam.
3. Welded sib koom tes tsim
Qhov tseem ceeb tshaj plaws thiab qhov tseem ceeb cuam tshuam rau kev vuam ultrasonic yog kev sib koom ua ke. Thaum cov seem nyob hauv tus qauv tsim, cov kws ua choj yuav tsum ua tib zoo xav thiab ntsuas. Muaj ntau yam tsim ntawm pob qij txha txuas nrog lawv tus kheej cov yam ntxwv thiab qhov zoo. Cov kev xaiv ntawm tus tsim yog nyob ntawm hom yas, ib feem geometry, vuam xav tau, kev txhaj tshuaj molding muaj peev xwm, thiab yam ntxwv yuav tsum tau ua.
Tus qauv koom ua ke:
Daim duab peb sab zog qhia kev ua lub zog tsim. Qhov no yog cov qauv siv feem ntau hauv ultrasonic vuam thiab qhov tsim qauv yooj yim tshaj plaws rau kev txhaj tshuaj molding. Nws yog tsiag ntawv los ntawm cov duab peb ceg me me ntawm lub dav hlau, sab saum toj ntawm daim duab peb sab yog 90 lossis 60 degrees. Vim tias nws cov ntsiab lus ntse tsim tau yooj yim los qhia thiab mloog zoo lub zog kev vibration, nws yog hu ua lub zog taw qhia kev sib tw.
Kauj ruam seam tsim, yooj yim txhaj tshuaj molding, kev coj tus kheej qhov chaw sab saud thiab qis, qhov siab vuam zoo, molten khoom ntws mus rau hauv txoj kab sib ntsug.
Grooved seam tsim, sab sauv thiab hauv qab tuaj yeem ua haujlwm rau tus kheej, nrog lub zog siab, cov yam ntxwv ntawm kev sib khi zoo, thiab tsis muaj qhov muag pom sab hauv thiab sab nraud. Qhov tsis zoo yog tias yuav tsum muaj qee qhov ua lub phab ntsa tuab.
Shearing seam tsim feem ntau siv rau vuam cov khoom me me uas yuav tsum muaj lub zog sib khi, thiab yog qhov tshwj xeeb tshaj yog siv rau kev siv vuam crystalline plastics.
Txoj phuam qhwv caj dab, uas feem ntau yog siv rau ntawm qhov chaw nrog cov duab puab lossis elliptical, muab lub zog muaj zog thiab siab khi, thiab tshwj xeeb tshaj yog tsim rau vuam crystalline plastics.
(Cov ncauj lus kom ntxaws saum toj no ntawm weld tsim yuav muab qhia hauv cov ntawv sau rov qab).
Txhawm rau txiav txim siab tias qhov tsim weld tsim nyog rau koj cov khoom, thov sab laj rau tus engineer lossis tus neeg muag khoom ntawm cov chaw tsim khoom ultrasonic.
4. Cuab tam thiab vuam lub taub hau
Feem ntau hais lus, cov qhua tuaj noj mov yuav xaiv cov twj siv thiab vuam taub hau ntawm tib lub hom vuam tshuab. Qhov tseeb, koj tuaj yeem xaiv xaiv cov khoom siv thiab vuam taub hau muab los ntawm lwm hom, ntev npaum li qhov zaus ntawm vuam taub hau yog tib yam li cov cuab yeej siv.
Cov khoom siv taub hau vuam tuaj yeem xaiv cov aluminium alloy, titanium alloy thiab tawv alloy steel. Cov cuab yeej siv rau kev xaiv tuaj yeem xaiv aluminium alloy, stainless hlau thiab cob pwm. Yuav ua li cas xaiv cov khoom siv, feem ntau xav txog hom yas, cov iav fiber ntau cov ntsiab lus ntawm cov khoom siv, cov qauv thiab qhov loj ntawm qhov sib koom tes, lub zog vuam thiab kev pab lub neej. Piv txwv li, txhawm rau txuas lub neej, carbide steel vuam taub hau yog qhov kev xaiv zoo tshaj plaws.
Ultrasonic vuam taub hau tuaj yeem tsim thiab ua kom zoo nrog FEA (Finite Element Analysis), tso cai rau cov kws ua haujlwm los ntsuas qhov kev co thiab kev nyuaj siab ntawm lub vuam taub hau ua ntej kev tsim khoom. Lub taub hau vuam zoo tsim yog qhov muaj cov tso zis ntuag thiab qhov kev ntxhov siab yam tsawg kawg nkaus. Hauv daim duab saum toj no, daim duab ntawm sab laug yog qhov ua kom pom tau zoo pem hauv ntej vuam taub hau tsim, thiab qhov tso zis ntus tsis sib luag. Ntawm sab xis, tom qab ua kom zoo dua, qhov tso zis ua haujlwm yog ib qho zoo sib xws.
Hauv kev txhim kho lub taub hau vuam tsim thiab tsim khoom, cov kab sib chaws yuav tsum ua kom zoo nyob rau hauv lub siab-vuam taub hau zoo ib yam yog qhov tseem ceeb heev. Ib qho asymmetric welding taub hau ua rau tsis-axial kev co. Kev co lub zog dhau los yuav ua rau muaj kev ntxhov siab ntxiv thiab ua rau lub taub hau vuam poob.
Cov cuab yeej siv zoo tsim kuj tseem ceeb heev. Cov cuab yeej muaj ob txoj haujlwm tseem ceeb: (1) ua ntu ntawm cov ntu hauv qab vuam taub hau; (2) nruj me ntsis txhawb nqa vuam thaj chaw. Cov khoom siv sib zog pab cuam tshuam rau ultrasonic lub zog rau qhov chaw weld, uas yog vim li cas lub cuab tam feem ntau ua los ntawm cov hlau ua khoom.
Txhawm rau txhim kho qhov hnav tsis kam ntawm lub vuam taub hau thiab ua kom lub neej kev pab ntau dua, saum npoo ntawm lub taub hau vuam tuaj yeem kho nrog tungsten carbide lossis chromium plating. Lub cuab tam tuaj yeem tsim hauv ntu kom zoo dua cov khoom ua tau zoo.
5. Vuam tsis ua
Thaum lub sij hawm vuam txheej txheem, vuam tsis muaj kev cuam tshuam yuav cuam tshuam rau vuam cov txiaj ntsig. Cov kev txwv no suav nrog kev ua kom loj, vuam vias, ntsuas qhov siab, vuam deb thiab vuam zog.
Ntau hom plastics xav tau ntau qhov sib txawv. Lub amplitude tuaj yeem muab kho kom zoo los ntawm qhov feem pua teeb tsa hauv software, lossis tuaj yeem kho nyob rau hauv qhov dav los ntawm kev hloov pauv ntawm cov kab ke dav nrog qhov sib txawv. Vuam siab tuaj yeem hloov kho los ntawm pob qhov rooj lossis chaw teeb tsa software. Kev txhais siab txhais tau tias thaum lub taub hau vuam nias qhov khoom thiab lub siab mus txog qee yam tsim nqi, lub cuab yeej pib emit ultrasound. Tus nqi no tuaj yeem hloov kho los ntawm lub pob qhov rooj lossis qhov chaw software.
Muaj ntau txoj kev tswj hwm rau cov txheej txheem ultrasonic vuam:
Lub sij hawm vuam hom, uas yog, teeb lub sijhawm ntawm ultrasonic vuam.
Kev ncua deb vuam hom (txoj haujlwm vuam hom), uas yog, teeb tsa vuam qhov chaw lossis qhov chaw.
Lub zog vuam hom, uas teeb tsa lub zog vuam.
Ntau hom vuam siv rau cov khoom sib txawv. Piv txwv li, daim ntawv vuam adopts vuam siv zog, cov khoom lag luam nrog ntau qhov ntev zam kev siv vuam sib txawv, thiab cov khoom lag luam nrog siab siab yuav tsum ua txoj hauj lwm vuam hom.
Yas ultrasonic welding yog cov txheej txheem tshwj xeeb. Thaum nyuam qhuav pib ntawm kev txhim kho khoom, nws yog qhov yuav tsum tau koom tes nrog cov chaw tsim khoom siv ultrasonic thiab siv cov cuab yeej ua haujlwm dhau los hauv qhov chaw no txhawm rau ntsuas cov khoom qauv thiab kev tsim qauv weld, thiab ua vuam kuaj ntawm kev kuaj. Txhawm rau txhawm rau txhim kho cov txiaj ntsig ntawm cov huab hwm coj tom ntej.
