Ultrasonic welding yog cov txheej txheem kev lag luam uas los ntawm high-zaus ultrasonic acoustic kev tsaws nyob hauv zos thov rau cov workpieces raug tuav ua ke nyob rau hauv siab kom tsim tau lub xeev-weld zoo. Nws yog feem ntau siv rau plastics thiab hlau, thiab tshwj xeeb tshaj yog rau koom nrog cov khoom sib txawv.In ultrasonic welding , tsis muaj cov hlua txuas, cov ntsia hlau, cov ntaub ntawv soldering, lossis cov nplaum tsim nyog los khi cov ntaub ntawv ua ke.Thaum ua ntawv thov rau cov hlau, ib qho tseem ceeb ntawm cov qauv no yog tias qhov ntsuas kub nyob qis dua qhov chaw melting ntawm cov ntaub ntawv koom nrog yog li tiv thaiv txhua yam tsis xav tau cov khoom uas yuav tshwm sim los ntawm kev kub kub ntawm cov khoom siv.
Cov ntaub ntawv thov ntawm ultrasonic vuam rau plastics uas tau ua tiav hauv xyoo 1960. Txog rau tam sim no tsuas yog cov yas tawv yuav tau welded. Lub tswv yim rau cov qauv ultrasonic rau vuam vias cov khoom siv phom tau raug muab rau Robert Soloff thiab Seymour Linsley xyoo 1965. Soloff, tus tsim ntawm Sonics & Material Inc., yog ib tus neeg saib xyuas (lab) ntawm Branson Instruments qhov twg yas zaj duab xis tau welded rau hauv hnab thiab tub ntxhais. siv ultrasonic xeem. Nws tsis txhob txwm txav mus rau qhov kev sojntsuam ze rau ntawm cov ntaub nplaum yas thiab lub hau dej ntawm lub tshuab xa khoom ua ke. Nws pom tau hais tias kev sojntsuam tsis tas yuav hloov mus los ntawm thaj chaw ib feem tabsis tabsis lub zog ultrasonic tuaj yeem mus ncig thiab ncig ib puag ncig uas cov plooj thiab weld txhua qhov sib koom ua ke. Nws tau mus tsim kho thawj cov xovxwm ultrasonic. Thawj thawj daim ntawv thov ntawm cov thev naus laus zis tshiab hauv kev lag luam cov khoom ua si.
Thawj lub tsheb ua tau tag nrho tawm ntawm cov yas tau sib sau ua ke siv ultrasonic vuam hauv xyoo 1969. Txawm hais tias cov tsheb yas tsis ntes, ultrasonic vuam puas tau ua. Kev lag luam tsheb tau siv nws tsis tu ncua txij xyoo 1980s. Tam sim no siv rau kev thov ntau yam.
Rau koom nrog txoj kev txhaj tshuaj txhaj tshuaj tiv thaiv txhaj pwm, thermoplastic khoom, tuaj yeem kho tau yooj yim kom haum qhov tseeb ntawm cov ntu ua welded. Cov seem yog qhaub cij ntawm lub zes puab ruaj ruaj ( thaiv ) thiab sonotrode (tshuab raj) txuas nrog lub twj hloov pauv, thiab ~ ~ 20 kHz tsawg-amplitude acoustic kev co yog emitted. (Nco tseg: Feem ntau siv nyob rau hauv ultrasonic vuam ntawm lub thermoplastics yog 15 kHz, 20 kHz, 30 kHz, 35 kHz, 40 kHz thiab 70 kHz). Thaum cov vuam txuas cov kav hlau, qhov cuam tshuam ntawm ob ntu yog qhov tshwj xeeb kom ua rau cov txheej txheem melting. Ib qho ntawm cov ntaub ntawv feem ntau muaj tus thawj coj nog lossis lub zog hloov uas hu rau lub qhov yas thib ob. Lub zog ultrasonic melts qhov sib kis ntawm qhov chaw, tsim ib qho kev sib koom ua ke. Tus txheej txheem no yog qhov zoo dua lwm txoj kev xaiv rau kua nplaum , ntsia hlau los yog tsim cov tsim snap-haum . Nws feem ntau siv nrog qhov me me (piv txwv li cov xov tooj ntawm tes, cov khoom siv hluav taws xob, cov cuab yeej kho mob pov tseg, khoom ua si, thiab lwm yam) tab sis nws tuaj yeem siv rau ntawm qhov loj xws li lub tsheb me me qhov ntsuas ntawm pawg. Ultrasonics kuj tseem siv tau los ua cov hlau tsis sib haum, tab sis feem ntau txwv rau qhov txuas me me ntawm cov hlau tsis tshua zoo, hlau tsis zoo, xws li txhuas, tooj liab, npib tsib xee. Ultrasonics yuav tsis siv rau hauv kev txuas vias lub tsheb ntawm lub tsheb lossis vuam sib tsoo ntawm cov tsheb kauj vab ua ke, vim lub zog yuav tsum tau siv.
Ultrasonic vuam ntawm cov thermoplastics ua rau lub zos melting ntawm cov yas vim kev nqus ntawm lub zog kev co thaum lub sib koom ua ke tau txais. Hauv cov hlau, vuam tshwm sim vim yog qhov kev sib tw ua kom siab ntawm cov nplaim oxides thiab kev txav chaw hauv zos ntawm cov khoom siv. Txawm hais tias muaj cua sov, nws tsis txaus kom yaj cov khoom siv hauv paus.
Ultrasonic vuam tuaj yeem siv rau ob qho tib si tawv thiab mos mos, xws li plastics semicrystalline , thiab cov hlau. Qhov kev nkag siab ntawm ultrasonic welding tau nce nrog kev tshawb nrhiav thiab kev sim. Kev tsim cov cuab yeej ua kom zoo dua qub thiab cov khoom pheej yig thiab qhov kev xav tau ntau dua rau cov khoom siv yas thiab khoom siv hluav taws xob tau ua rau muaj kev paub ntau ntxiv ntawm cov txheej txheem ib txwm. Txawm li cas los xij, ntau yam ntawm ultrasonic vuam tseem tseem xav tau kev kawm ntau ntxiv, xws li hais txog weld zoo rau cov txheej txheem tsis. Ultrasonic vuam txuas ntxiv mus ua ib thaj chaw tsim kho sai heev.
Cov kws tshawb fawb los ntawm lub koom haum ntawm Science Science thiab Engineering (WKK) ntawm University of Kaiserslautern, nrog kev txhawb nqa los ntawm German Kev Tshawb Fawb Lub Cev ( Deutsche Forschungsgemeinschaft ), tau ua tiav qhov ua pov thawj tias siv cov txheej txheem ultrasonic vuam tuaj yeem ua rau muaj kev sib raug zoo ntawm cov hlau thiab lub teeb -fiber-reinforced polymer (CFRP) nplooj ntawv.
Cov txiaj ntsig ntawm ultrasonic vuam yog tias nws tau nrawm dua li cov pa nplaum los yog cov kuab tshuaj. Lub sijhawm ziab kom nrawm heev, thiab cov khoom siv tsis tas yuav nyob hauv ib qho khoom siv rau lub sijhawm ntev tos lub sijhawm sib koom tes kom qhuav lossis kho. Lub vuam tuaj yeem muab kho tau yooj yim, ua kom muaj cov ntawv huv thiab meej; Lub vev xaib ntawm lub weld yog huv heev thiab tsis tshua muaj qhov xav tau kov haujlwm. Cov cuam tshuam tsawg thermal ntawm cov ntaub ntawv txuam nrog cov khoom siv ntau dua yuav tsum tau welded ua ke.
