Ultrasonic ua ke sib xyaw ua ke tau siv dav hauv kev sib txuas ntawm thermoplastics. Cov pob qij txha ua los ntawm nws tsis yog tsuas yog muaj zog thiab ruaj, tab sis kuj zoo nkauj nyob rau hauv tsos. Qhov no thev naus laus zis npog plaub ntau pawg loj, ntawm ultrasonic vuam yog qhov tseem ceeb ntawm kev tshawb fawb. Ultrasonic welding siv high-zog ultrasonic zog (15-50 KHz) los tsim cov qes (1-100μm) Neeg kho tshuab deeg. Qhov kev co no ua rau cov pob qij txha ntawm cov khoom sib koom ua ke, yaj cov khoom thermoplastic los ntawm kev sib txhuam kub ua ke, thiab tom qab ntawd tsim ib weld. Nws txoj kev vuam nrawm yog qhov ceev heev, feem ntau ntawm 0.1 vib nas this thiab 1.0 feeb.
Thaum lub sij hawm ultrasonic vuam txheej txheem, sinusoidal sawv vuag yog tsim nyob rau hauv thermoplastics. Vim muaj kev sib xyaw ua ke sib txhuam, ib feem ntawm lub zog hloov pauv mus rau hauv lub zog cua sov, uas nce qhov ntsuas kub. Lwm feem ntawm lub zog yog feeb thiab pauv mus rau kev sib koom ua ke, uas yog txuas ntxiv hauv zos los ntawm ciam teb kev sib txhuam. Yog li, cov kev xa hluav taws xob ntawm ultrasonic zog thiab melting cwj pwm ntawm cov khoom siv cuam tshuam los ntawm geometry ntawm ib feem thiab cov yam ntxwv ultrasonic resatics ntawm cov khoom.
Thaum cov kev co yog ze rau Weld sib koom tes, cov khoom muaj tsawg dua kev nqus lub zog poob. Yog tias qhov kev ncua deb ntawm qhov kev co los ntawm kev sib koom ua ke yog tsawg dua 6.4 hli, yog tsim nyog hu rau crystalline cov ntaub ntawv nrog lub zog nqus nqus thiab cov khoom ruaj khov. Yog tias qhov kev ncua deb yog ntau dua 6.4 hli, nws hu ua cov khoom siv nyob deb ntawm cov amorphoud nrog cov khoom nqus hluav taws xob qis thiab cov khoom muaj zog.
Vim yog cov "tsis sib xws" ntawm cov kev sib koom ua ke, nws yog qhov yooj yim los tsim kev sib txhuam siab thiab muaj kev sib txhuam siab, uas muaj peev xwm ua rau muaj kev sib txuam ntawm ultrasonic lub zog. Nyob rau hauv ntau cov ntawv thov vuam, ib daim duab peb hlis kev tawm tsam yog tsim nyob rau ntawm sab qaum, hu ua kev co lub zog kom mloog zoo ntawm kev sib koom ua ke.
Thaum lub sij hawm vuam ultrasonic, qhov kev co hluav taws xob ua rau qhov chaw sib koom ua ke, thiab cov lus qhia ntawm lub zog ntawm tus lej sib cuag welded ntu hauv siab. Vim kev sib txhuam tshav kub kub tiam, ntau npaum li cas ntawm cov cua sov yog tsim ntawm cov taub, ua rau lub zog qhia tav los pib yaj. Tag nrho vuam txheej txheem tuaj yeem faib ua plaub theem. Ua ntej, sab saum toj ntawm lub zog taw qhia tav pib kom yaj, thiab cov nqi melting maj mam nce. Raws li cov kis ntawm ob sab ntawm pob qij txha txo qis, Moltt Zog Tshaj Tawm thiab hu rau ntu hauv qab no, thiab tus nqi yaj yuav poob rau lub sijhawm no. Thib ob, sab saud thiab qis dua yog nyob rau hauv kev sib chwv nto, thiab lub cheeb tsam melting yog nthuav ntxiv. Tom qab ntawd, nws nkag mus rau theem-lub xeev melting theem, thaum lub sijhawm twg molten txheej ntawm ib qho tuab yog tsim, nrog cov chaw kub ruaj khov. Thaum lub sij hawm pretet vuam zog, lub sijhawm lossis lwm yam kev tswj hwm tau mus txog, kev co ultrasonic nres. Thaum kawg, lub siab yog tswj xyuas, cov yaj dhau lawm yuav raug muab tso tawm ntawm Weld, thiab cov ntu txuas nrog cov hlua khi thiab maj mam txias txias.
Qhov zoo thiab qhov tsis zoo ntawm Ultrasonic Vuam
Raws li cov yas koom nrog technology dav hauv kev lag luam, ultrasonic vuam sawv ntsug rau nws cov kev sib tw nrawm, kev koom ua ke, kev sib xyaw ua ke yooj yim rau huab hwm coj ntau lawm. Nws cov khoom ruaj khov yog qhov zoo tshaj plaws, lub zog kuj tseem siab, thiab lub sijhawm muaj vuam sib tw luv dua lwm cov txheej txheem. Ib qho ntxiv, cov thev naus laus zis tsis tas yuav tshem pa taws lossis lub zog txias kom tshem tawm cov cua sov ntau thiab ntau dua kev ua haujlwm thiab tus nqi qis dua. Cov pwm tsim yog qhov yooj yim thiab cov pwm hloov nrawm nrawm nrawm nrawm, yog li kev txhim kho tus nqi siv thiab versatility ntawm cov khoom siv. Nws yog tsim nyog teev uas txij thaum tsis muaj lwm cov ntaub ntawv vuam tau qhia rau hauv Weld, tsis muaj kev cuam tshuam rau kev lag luam kho mob, thiab yog qhov tsim nyog rau kev lag luam kho mob nrog cov yuav tsum tau ua kom huv.
Txawm li cas los xij, ultrasonic vuam kuj fim qee qhov kev txwv. Rau cov khoom lag luam uas muaj ntau dua 250mm300mm, tus qauv tsim ntawm lub taub hau vuam ua rau synchronous vuam lossis ib lub taub hau vuam rau ua kom tiav. Tsis tas li ntawd, cov txiaj ntsig ntawm ultrasonic vuam yog ze ze rau cov yam xws li Weld qauv tsim, txhaj tshuaj molding qhov ua yuam kev thiab deformation. Nyob rau tib lub sijhawm, ultrasonic deeg yuav ua rau muaj kev puas tsuaj hluav taws xob, txawm hais tias cov kev pheej hmoo hluav taws xob no tuaj yeem txo qis ntau zaus thiab txo cov amplitude.
Daim Ntawv Thov
Ultrasonic vuam yog dav siv nyob rau hauv ntau qhov kev lag luam. Piv txwv li, hauv kev lag luam hauv tsheb, nws yog siv los txuas cov khoom sib txuas xws li taws teeb, dashboard, khawm thiab khawm; Nyob rau hauv cov khoom siv hluav taws xob thiab kev lag luam hluav taws xob, cov thev naus laus zis no tseem siv los txuas cov khoom sib txuas xws li hloov pauv, sensors thiab ActuanSers; Tsis tas li ntawd, Ultrasonic vuam tseem muaj qhov tseem ceeb hauv kev tsim khoom ntawm cov khoom lag luam xws li cov ntxaij lim dej xws li cov ntxaij lim dej, cov kaus mom, tshuaj kho cov khaub ncaws thiab cov ntsej muag hauv chav kho mob. Tib lub sijhawm, cov khoom lag luam ntau lawm xws li lub hnab hlwv los, ntim khoom ntim thiab muaj cov khoom ntim khoom siv tau los ntawm kev ua haujlwm zoo thiab yooj yim ntawm ultrasonic vuam.
Lub khob kas fes yog ua los ntawm PS khoom, thiab nws weld tsim cleverly mingisity thiab lub zog-qhia kev sib txuas, tab sis kuj txhim kho kev ua haujlwm ntawm kev tsim khoom.
Lub tshuab hluav taws xob hloov yog ua los ntawm abs yas thiab ua kom zoo los ntawm ultrasonic riveting.
Lub reaforor yog ua los ntawm cov khoom sib xyaw thiab PC, thiab sib xyaw ua ke ntawm cov kauj ruam thiab lub zog-qhia cov saw hlau los tsim cov qauv txheej txheem tshwj xeeb.
Cov teeb hluav taws xob siv cov khoom siv hluav taws xob ntawm ABS thiab PMMA, sib xyaw nrog cov kab hlau ua haujlwm ntawm lub dav hlau thiab lub zog-qhia cov tav, nthuav qhia tus qauv tsim qauv.
Lub tshuab hluav taws xob txuas ua ke cov khoom siv cov khoom siv ntawm Abs thiab hlau, thiab ua kom muaj kev ruaj khov thiab ruaj khov los ntawm kev sib txuas ultrasonic riveting.
Lub raj tshuaj kho mob yog tsim los ntawm cov khoom siv pc thiab ntse siv cov laj kab fusion ntawm kev tsim dav hlau thiab lub zog-qhia tav.
Roj Roj Lim Lim yog ua los ntawm Nylon 6-6, thiab nws tus qauv tsim conterly sib xyaw ua ke ntawm shear seams thiab welds.
Cov sib dhos ntawm lub lim membrane thiab lub suab-nqus cov paj rwb siv nrog cov ntaub ntawv nylon nrog 30% fiber ntau, thiab yog sib dhos kom zoo los ntawm cov txheej txheem vuam.
Lub thawv hluav taws xob siv cov khoom siv sib xyaw ua ke ntawm PS thiab tooj liab ceev, thiab yog finely ua los ntawm ultrasonic inlay thev naus laus zis.
Lub rotor siv PS khoom siv thiab muab cov khoom siv ntse sib xyaw ntawm lub dav hlau thiab lub zog-ua cov tav khawm.
Polymer qauv
Cov qauv molecular ntawm amorphous plastics yog cov faib faib tau thiab tsis muaj kev npaj ruaj ruaj. Nws cov yam ntxwv yog tias nws maj mam muag nrog qhov ntsuas kub. Thaum cov khoom siv no mus txog lub khob hloov cua kub, nws maj mam softens thiab thaum kawg nkag mus rau hauv lub xeev kua molten. Cov txheej txheem ntawm cov khoom siv los ntawm kua rau solidification yog maj. Amorphous plastics tuaj yeem hloov cov kev qev ultrasonic, thiab vim tias lawv qhov muag ntub dej ntau, lawv tau yooj yim rau weld thiab ua tiav kev sib khi.
Ntawm qhov tod tes, cov qauv molecular ntawm Semi-Crystalline cov plastics yog kev txiav txim. Kev kub kub yog qhov tseem ceeb los ua kom tawg cov txheej txheem txheej txheem. Cov plastics muaj ntse melting cov ntsiab lus, thiab thaum lub ntsuas kub me me, lub xeev ua kua yuav solrifify solrify sai. Yog li ntawd, cov yaj tau ntws tawm ntawm lub qhov kub yaj kub npau taus yuav ua rau sai. Thaum twg cov khoom ua kom zoo nkauj ntawm cov ntaub ntawv molecular ntawm semi-crystalline cov ntaub ntawv yog zoo li lub caij nplooj ntoos hlav, nqus tau feem ntau ntawm cov ultrasonic chibrations es tsis txhob hloov lawv mus rau qhov chaw sib koom ua ke. Yog li ntawd, rau semi-crystalline plastics, lub siab-amplitude tso tawm vuam yog qhov yuav tsum tau los tsim kom muaj cua sov txaus.
TG Hloov qhov kub thiab tm melting kub
Thaum tham txog cov qauv polymer, peb tau hais txog ob lub ntsiab lus tseem ceeb: TG Nias qhov kub thiab txias thiab kub. TG yog qhov ntsuas kub ntawm cov khoom hloov los ntawm lub xeev iav rau lub xeev siab heev, thaum lub sijhawm twg cov khoom pib zuj zus. TM yog qhov kub xav tau rau cov khoom siv kom yaj ua kua. Cov ob kub cov cwj pwm yog qhov tseem ceeb heev kom nkag siab txog kev ua thiab kev ua tau zoo ntawm cov khoom siv polymer.
Sab laug ntawm daim duab saum toj no qhia tau amorphous yas, thaum sab xis pom pom cov yas semi-crystalline yas. Hauv thermoplays, fiber xws li iav fiber ntau, talc, thiab cov minerals tuaj yeem txhim kho lossis cuam tshuam cov nyhuv ultrasonic vuam. Qee cov ntaub ntawv, xws li calcium carbonate, Talc, Talc, silica, callica, callica, tshuaj ntsuab metasilate (wollastonite) thiab mica, tuaj yeem nce lub hardness ntawm lub resin. Cov kev tshawb fawb tau pom tias thaum cov ntawv ua tub lim rau 20%, nws tuaj yeem ua kom muaj txiaj ntsig zoo ntawm kev sib kis tau ntawm ultrasonic deeg nyob rau hauv cov khoom, tshwj xeeb tshaj yog rau semi-crystalline cov ntaub ntawv. Txawm li cas los xij, thaum cov ntsiab lus ua tub lim ntau dua 35%, kev ntseeg tau ntawm lub foob yuav cuam tshuam vim tsis muaj cov ntsiab lus ntawm Weld. Thaum cov ntsiab lus muab tub lim rau 40%, cov iav fibers yuav sib sau ua ke ntawm txoj haujlwm sib koom tes, uas ua rau cov ntsiab lus tsis txaus ntawm Weld, uas nyeg cuam tshuam rau kev siv Weld. Tsis tas li ntawd, thaum lub sijhawm txhaj tshuaj molding cov txheej txheem, ntev iav cov hniav zoo li ua rau muaj lub zog ntawm cov tav toj. Ib qho kev daws teeb meem zoo yog siv cov iav luv luv cov fibers hloov cov iav ntev fibers.
Ib qho ntxiv, thaum cov ntsiab lus ua tub lim ntau dua 10%, cov khoom ua kom muaj zog hauv cov khoom yuav ua rau hnav ntawm lub taub hau vuam. Yog li ntawd, nws raug nquahu kom siv carbide steel vuam taub hau lossis titanium alloy vuam lub taub hau nrog tungsten carbide txheej. Nyob rau tib lub sijhawm, nws yuav tsim nyog los xaiv lub zog ultrasonic siab dua los xyuas kom muaj qhov kub txaus yog tsim kom muaj cua sov.
Ntawm qhov tod tes, thaum additives tuaj yeem txhim kho cov kev ua tau zoo tag nrho lossis txhaj tshuaj molding ntawm cov khoom, lawv feem ntau muaj cov nyhuv inisence ntawm ultrasonic vuam. Cov tshuaj sib ntxiv suav nrog roj nplua nyeem, cov khoom siv, cov hluav taws xob hloov kho, xim retardants, counorants cov neeg sawv cev, thiab cov chaw ua npuas dej. Piv txwv, cov roj nplua xws li siv quav ciab, zinc stearate, thiab cov roj acid, thiab cov roj ntsha ua rau cov kev sib txhuam ntawm polymer lwg me me, yog li txo cov kauj vab kub. Txawm li cas los xij, cov nyhuv no feem ntau yog feem ntau me dua ntawm kev sib koom tes vim tias cov roj nplua nyeem yog cov qes thiab tusyees dispersed. Ntawm qhov tod tes, cov tshuab yas xws li cov roj ntsha hnyav lossis txo qis qis zuj zus los ntawm cov khoom siv roj av thiab cuam tshuam nrog kev sib kis lub zog. Tshwj xeeb, cov ntaub ntawv yas yas xws li Vinyl yog qhov tsis tsim nyog raws li kev xa cov ntaub ntawv rau ultrasonic deeg. Ib qho ntxiv, cov yas tshuab ua lwm tus ntxiv tuaj yeem tsiv mus rau saum npoo ntawm cov yas dhau lub sijhawm, txuas ntxiv cuam tshuam cov nyhuv ntawm ultrasonic vuam. Ib yam li ntawd, cuam tshuam hloov kho xws li roj hmab kuj txo cov khoom siv lub zog ultrasonic loj kom yaj cov yas.
Nplaim taws retardants, inorganic oxides lossis halogenated organic (xws li poron, poron, boronen lossis phospory cov khoom siv hluav taws lossis hloov nws cov yam ntxwv sib txuas. Txawm li cas los xij, cov khoom xyaw no feem ntau ua rau cov khoom tsis muaj hnub nyoog, tshwj xeeb tshaj yog thaum cov nplaim ci retardant account rau 50% lossis ntau dua, uas yuav txo cov khoom weldable. Rau cov ntaub ntawv zoo li no, High-power ultrasonic cov khoom siv thiab vuam hau nrog ntau lub zog loj yog qhov yuav tsum tau hloov kho, thiab cov qauv sib koom ua ke tau hloov kho kom nce cov khoom siv weldable.
Cov xim feem ntau, suav nrog cov pigments thiab dyes, tsis txhob tab kaum los ntawm ultrasonic deeg. Txawm li cas los xij, lawv tuaj yeem txo cov khoom muaj ntau yam hauv cov chaw sib koom ua ke. Tshwj xeeb, thaum cov ntsiab lus ntawm titanium dioxide ( Nyob rau tib lub sijhawm, carbon dub yuav cuam tshuam nrog kev tshaj tawm ntawm ultrasonic zog hauv cov khoom siv.
Foaming cov neeg sawv cev txo cov khoom siv muaj peev xwm hloov cov qauv ultrasonic tsawg dua vim tias lawv cov qauv loj tiv thaiv lub zog loj.
Thaum av nyob (rapind) yog sib xyaw rau hauv cov khoom siv, nws ntxiv thiab ntim yuav tsum tau ua tib zoo ntsuas thiab ua kom zoo rau kev ua kom zoo. Hauv qee kis, regind yuav siv tsis tau txhua thiab 100% cov khoom muag nkauj xwb.
Ib qho ntxiv, thaum cov neeg sawv cev sib npaug xws li zinc stearate, txhuas cov fluorocarbons thiab txo cov kev txhuam hniav ntawm cov khoom siv, yog li txo cov cua sov tiam thiab inhibiting ultrasonic vuam. Nyob rau tib lub sijhawm, pwm cov neeg sawv cev kuj yuav ua rau cov tshuaj tsis huv thiab cuam tshuam rau kev tsim kom raug cov tshuaj kom raug. Silicones, tshwj xeeb, muaj qhov cuam tshuam tseem ceeb tshaj plaws. Yog li ntawd, thaum siv cov neeg sawv cev tso tawm, nws yog qhov tsim nyog kom ua tib zoo xaiv cov qib tsim nyog thiab kev ntsuas kom tiv thaiv nws ntawm ntu.
Ib qho ntxiv, cov qhab nia sib txawv yuav muaj kev sib txawv melting kub thiab ntws ntsuas, uas tuaj yeem cuam tshuam cov nyhuv ntawm ultrasonic vuam. Piv txwv li, pov cov qib PMMA yuav nyuaj rau kev txhaj tshuaj / qib siab vim lawv lub cev hnyav dua thiab kub yaj. Yog li ntawd, txhawm rau txais cov ntaub ntawv vuam zoo tshaj plaws, sim xaiv cov ntaub ntawv ntawm tib cov ntaub ntawv ntawm ob cov ntaub ntawv yog zoo sib xws thiab qhov sib txawv melting yog tsis pub dhau 22 degree.
Cov dej noo cov ntsiab lus ntawm cov khoom muaj qhov cuam tshuam tseem ceeb ntawm nws Weld lub zog. Hydroscopic cov ntaub ntawv xws li PBT, PC, PSU thiab nylon yooj yim nqus dej noo los ntawm huab cua. Thaum lub sij hawm vuam ua haujlwm, kev nqus dej noo yuav rhaub ntawm cov roj av siab, yog li cuam tshuam rau cov roj av, yog li cuam tshuam thiab sib khi ntawm Weld. Txhawm rau zam qhov no, cov ntaub ntawv hydroscopic yuav tsum welded tam sim ntawd tom qab txhaj tshuaj molding. Yog tias tsis tuaj yeem ua rau vuam tam sim no, cov ntu qhuav yuav tsum muab cia rau hauv ib lub hnab qhuav lossis muab tso rau hauv qhov cub ntawm 80℃ua ntej vuam.
Ib qho ntxiv, thaum vuam sib txawv hom ntaub ntawv, tshwj xeeb saib yuav tsum tau them rau cov qauv kub yaj thiab cov qauv molecular ntawm ob cov khoom. Qhov zoo tshaj plaws vuam yog tias kev sib txawv melting sib txawv ntawm ob yam khoom tsis tshaj 22℃thiab cov qauv molecular zoo sib xws. Yog tias qhov sib txawv melting kub loj dhau, cov khoom siv nrog rau qhov qis dua thiab ua ntej thiab txaus tsis muaj cua sov txaus los ua kom sov siab. Piv txwv li, thaum vuam siab-melting-jelting-pot-melting-pot-melting pmma, yog tias lub zog tus txiv neej sib koom ua ke, uas nyob rau hauv lem cuam tshuam rau kev ua lub zog vuam.
Tsis tas li ntawd, cov khoom siv sib raug zoo kuj tseem yog qhov tseem ceeb rau kev ua tiav vuam. Tsuas yog siv cov ntaub ntawv tshaj tshuaj, uas yog, cov ntaub ntawv nrog cov qauv molecular zoo sib xws, tuaj yeem welded. Nws yog tsim nyog sau tseg tias cov ntaub ntawv sib xyaw feem ntau muaj nyob nruab nrab ntawm amorphous cov ntaub ntawv, xws li Abs thiab Pmma, Pc thiab PMMA, thiab PS thiab hloov kho PPO. Txawm li cas los xij, ib nrab crystalline plastics xws li PP thiab PE, txawm hais tias lawv muaj cov qauv zoo sib xws, muaj cov khoom siv hluav taws xob zoo sib xws thiab yog li tsis muaj cov khoom sib txawv thiab tsis tuaj yeem welded.
