Vuam ntawm ultrasonic plastics, yas, hlau, cov ntaub ntawv polymeric, aluminium profiles. Ultrasonic vuam: tshuab, teeb meem yam

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28

Ultrasonic vuam ntawm cov hlau yog txheej txheem thaum lub sij hawm sib koom ua ke mus tas li nyob rau hauv cov theem khoom. Kev tsim ntawm cov menyuam yaus hauv cheeb tsam (nyob rau hauv uas daim ntawv cog lus tau tsim) thiab kev sib cuag ntawm lawv tshwm sim nyob rau hauv lub zog ntawm cov cuab yeej tshwj xeeb. Nws muab kev sib koom tes ntawm cov txheeb ze kos npe- alternating tangential hloov chaw ntawm me me amplitude thiab compressive ib txwm quab yuam ntawm lub blanks. Cia wb mus saib seb lub tshuab ultrasonic vuam yog dab tsi.

Kev sib txuas mechanism

Tsawg-amplitude hloov chaw tshwm sim ntawm qhov chaw nrog ultrasonic zaus. Vim lawv, microroughnesses ntawm qhov chaw ntawm qhov chaw yog raug rau cov yas deformation. Nyob rau tib lub sijhawm, cov khoom paug raug tshem tawm ntawm thaj chaw sib txuas. Ultrasonic mechanical vibrations raug xa mus rau qhov chaw vuam los ntawm cov cuab yeej sab nraud ntawm lub workpiece. Tag nrho cov txheej txheem yog tsim nyob rau hauv xws li ib txoj kev xws li kom tsis txhob slippage ntawm lub fixture thiab kev txhawb nqa nrognthuav dav qhov chaw. Thaum lub sij hawm kev vibrations los ntawm lub workpiece, lub zog yog dissipated. Qhov no yog muab los ntawm kev sib txhuam sab nraud ntawm qhov chaw ntawm qhov chaw pib ntawm vuam thiab kev sib txhuam sab hauv hauv cov khoom siv nyob nruab nrab ntawm kev txhawb nqa thiab cov cuab yeej tom qab tsim qhov chaw. Qhov no nce qhov kub ntawm qhov sib koom ua ke, ua kom yooj yim rau deform.

Kev coj cwj pwm tshwj xeeb

Tangential displacements ntawm cov khoom thiab cov kev ntxhov siab uas lawv ua thiab ua ua ke nrog compression los ntawm vuam quab yuam muab localization ntawm hnyav yas deformation nyob rau hauv me me ntim nyob rau hauv lub ze-ntog txheej. Tag nrho cov txheej txheem yog nrog los ntawm kev sib tsoo thiab cov neeg kho tshuab khiav tawm ntawm oxide zaj duab xis thiab lwm yam khoom paug. Ultrasonic vuam txo lub zog tawm los, yog li yooj yim rau cov yas deformation.

txheej txheem nta

Ultrasonic welding pab txhawb kev tsim cov xwm txheej tsim nyog rau kev sib txuas. Qhov no yog guaranteed los ntawm mechanical vibrations ntawm lub transducer. Vibration zog tsim complex shear, compression, thiab strain stresses. Yas deformation tshwm sim thaum lub elastic txwv ntawm cov ntaub ntawv yog tshaj. Tau txais kev sib txuas ruaj khov yog ua kom ntseeg tau los ntawm kev nce thaj tsam ntawm kev sib cuag ncaj qha tom qab kev khiav tawm ntawm qhov chaw oxides, organic thiab adsorbed films.

Siv KM

Ultrasound yog siv dav hauv kev tshawb fawb. Nrog nws cov kev pab, cov kws tshawb fawb tshawb xyuas ntau lub zog ntawm lub cevtshuaj thiab phenomena. Hauv kev lag luam, ultrasound yog siv rau degreasing thiab ntxuav cov khoom, ua haujlwm nrog cov khoom siv tshuab nyuaj. Tsis tas li ntawd, kev hloov pauv tau zoo cuam tshuam rau crystallizing melts. Ultrasound muab lawv nrog degassing thiab grain refinement, txhim kho cov khoom siv ntawm cov khoom cam khwb cia. Kev vibrations pab txhawb kom tshem tawm cov kev ntxhov siab seem. Lawv kuj tau dav siv los ua kom tus nqi ntawm cov tshuaj tiv thaiv qeeb. Ultrasonic vuam siv tau rau ntau lub hom phiaj. Kev vibrations tuaj yeem dhau los ua lub zog rau kev tsim cov seam thiab taw tes cov pob qij txha. Thaum lub pas dej weld raug rau ultrasound thaum lub sij hawm crystallization, cov khoom siv kho tshuab ntawm kev sib koom ua ke tau txhim kho vim qhov kev ua kom zoo ntawm cov qauv weld thiab kev tshem tawm cov roj ntau ntau. Vim lub fact tias kev vibrations nquag tshem tawm cov av, cov khoom siv dag zog thiab cov yeeb yaj kiab ntuj, nws tuaj yeem txuas qhov chaw nrog oxidized, varnished, thiab lwm yam. Ultrasound pab txhawb kev txo lossis tshem tawm ntawm tus kheej-kev ntxhov siab uas tshwm sim thaum vuam. Vim muaj kev vibrations, nws muaj peev xwm ua kom ruaj khov ntawm cov qauv ntawm cov compound. Qhov no, nyob rau hauv lem, ua rau nws muaj peev xwm tiv thaiv tau spontaneous deformation ntawm cov qauv tom qab. Ultrasonic welding tsis ntev los no tau siv ntau thiab ntau dua. Qhov no yog vim undoubted zoo ntawm no kev twb kev txuas txoj kev nyob rau hauv kev sib piv nrog rau txoj kev txias thiab kev sib cuag. Tshwj xeeb tshaj yog feem ntau ultrasonic vibrations yog siv nyob rau hauv microelectronics.

cog lus kev taw qhiasuav tias yog ultrasonic vuam ntawm cov ntaub ntawv polymeric. Ib txhia ntawm lawv tsis tuaj yeem txuas nrog lwm txoj hauv kev. Ntawm cov tuam txhab lag luam, ultrasonic vuam ntawm nyias-walled aluminium profiles, ntawv ci, hlau yog tam sim no nqa tawm. Txoj kev no yog tshwj xeeb tshaj yog zoo rau kev koom nrog cov khoom los ntawm cov khoom sib txawv. Ultrasonic vuam ntawm aluminium yog siv los tsim cov khoom siv hauv tsev. Txoj kev no yog siv tau thaum sib txuas cov ntaub ntawv raw (nickel, tooj liab, alloys). Ultrasonic vuam ntawm plastics tau pom daim ntawv thov nyob rau hauv zus tau tej cov optics thiab zoo mechanics li. Tam sim no, cov cav tov tau tsim thiab nkag mus rau hauv kev tsim khoom rau kev sib txuas ntau yam ntawm microcircuits. Cov cuab yeej tau nruab nrog cov khoom siv tsis siv neeg, vim qhov khoom tsim tau nce ntxiv.

US power

Ultrasonic vuam ntawm cov yas muab kev sib txuas mus tas li vim yog kev sib xyaw ua ke ntawm cov tshuab hluav taws xob ntau zaus thiab lub zog me me. Txoj kev no muaj ntau yam nrog rau txoj kev txias. Lub zog ultrasonic uas tuaj yeem kis tau los ntawm qhov nruab nrab yuav nyob ntawm seb lub cev muaj zog ntawm qhov kawg. Yog hais tias lub zog txwv nyob rau hauv cov cheeb tsam compression yog tshaj, cov khoom siv yuav vau. Nyob rau hauv cov xwm txheej zoo sib xws, cavitation tshwm sim hauv cov kua, nrog rau cov tsos ntawm cov npuas me me thiab lawv tom qab tawg. Ua ke nrog cov txheej txheem tom qab, kev ntxhov siab hauv zos tshwm sim. Qhov tshwm sim no yog siv los ntxuav thiab ua cov khoom.

Device nodes

Ultrasonic vuam ntawm cov yas yog nqa tawm sivcov tshuab tshwj xeeb. Lawv muaj cov hauv qab no:

1. khoom siv.
2. Vibrational mechanical system.
3. Control khoom.
4. siab tsav.

Lub oscillatory system yog siv los hloov hluav taws xob rau hauv lub tshuab hluav taws xob rau nws qhov kev xa mus tom ntej mus rau ntu kev sib txuas, tsom mus rau nws thiab tau txais tus nqi xav tau ntawm cov emitter ceev. Cov node muaj:

1. Electromechanical transducer nrog windings. Nws tau muab ntim rau hauv rooj plaub hlau thiab txias los ntawm dej.
2. YElastic oscillation transformer.
3. Vuam tip.
4. Txhawb nrog lub tshuab siab.

Lub kaw lus yog kho siv lub diaphragm. Ultrasonic hluav taws xob tshwm sim tsuas yog thaum lub sijhawm vuam. Cov txheej txheem tshwm sim nyob rau hauv kev cuam tshuam ntawm kev vibrations, siab thov ntawm txoj cai kaum rau saum npoo, thiab cov nyhuv thermal.

Txoj kev muaj peev xwm

Ultrasonic vuam yog qhov zoo tshaj plaws rau cov khoom siv yas. Cov khoom ua los ntawm tooj liab, npib tsib xee, kub, nyiaj, thiab lwm yam tuaj yeem ua ke nrog ib leeg thiab nrog rau lwm yam khoom siv yas qis. Raws li lub hardness nce, lub ultrasonic weldability deteriorates. Cov khoom siv refractory ua los ntawm tungsten, niobium, zirconium, tantalum, molybdenum tau zoo txuas nrog kev pab ntawm ultrasound. Ultrasonic vuam ntawm polymers yog suav hais tias yog ib txoj kev tshiab. Cov khoom zoo li no tuaj yeem txuas ob qho tib si rau ib leeg thiab rau lwm qhov chaw. Raws li cov hlau, nws tuaj yeem ua ke nrogiav, semiconductors, ceramics. Koj tuaj yeem khi blanks los ntawm interlayer. Piv txwv li, cov khoom steel yog welded rau ib leeg los ntawm txhuas yas. Vim lub sijhawm luv luv nyob rau hauv qhov kub siab, qhov kev sib txuas zoo ntawm cov khoom sib txawv tau txais. Cov khoom ntawm raw cov ntaub ntawv yuav raug hloov me ntsis. Qhov tsis muaj txawv teb chaws impurities yog ib qho zoo uas ultrasonic vuam muaj. Tej yam uas tsim kev puas tsuaj rau tib neeg kuj tsis muaj. Thaum txuas nrog, cov kev nyiam huv huv yog tsim. Daim ntawv cog lus ntawm cov khoom yog tshuaj homogeneous.

Kev Sib Txuas Nta

Hlau vuam yog ua tiav, raws li txoj cai, nyob rau hauv txoj kev sib tshooj. Nyob rau tib lub sijhawm, ntau yam qauv tsim tau ntxiv. Vuam tuaj yeem ua tau los ntawm cov ntsiab lus (ib lossis ntau dua), ib qho txuas txuas ntxiv lossis hauv lub voj voog kaw. Qee qhov xwm txheej, thaum lub sijhawm tsim ua ntej ntawm qhov kawg ntawm cov xaim dawb paug, tee kev twb kev txuas yog ua nrog lub dav hlau. Nws yog ua tau los nqa tawm ultrasonic vuam ntawm ob peb cov ntaub ntawv nyob rau tib lub sij hawm (pob).

Pib thickness

Nws raug txwv los ntawm kev txwv sab saud. Nrog rau kev nce hauv thickness ntawm cov hlau workpiece, nws yog ib qhov tsim nyog yuav tau siv oscillations nrog ib tug loj amplitude. Qhov no yuav them rau qhov poob ntawm lub zog. Ib qho kev nce hauv amplitude, nyob rau hauv lem, muaj peev xwm mus txog rau ib tug tej yam kev txwv. Kev txwv tsis pub muaj feem cuam tshuam nrog qhov tshwm sim ntawm kev qaug zog tawg, loj dents los ntawm lub cuab yeej. Hauv cov xwm txheej zoo li no, ib tus yuav tsum ntsuas seb yuav ua li casultrasonic vuam yuav tsim nyog. Hauv kev xyaum, txoj kev yog siv rau cov khoom thicknesses ntawm 3…4 µm rau 05…1 hli. Vuam kuj tseem siv tau rau qhov chaw nrog lub cheeb ntawm 0.01 … 05 mm. Lub thickness ntawm cov khoom thib ob yuav muaj ntau dua li thawj.

Teeb meem tshwm sim

Thaum siv txoj kev vuam ultrasonic, nws yog ib qho tsim nyog yuav tsum coj mus rau hauv tus account qhov tshwm sim ntawm kev qaug zog tsis ua haujlwm ntawm cov pob qij txha uas twb muaj lawm hauv cov khoom. Thaum lub sij hawm tus txheej txheem, lub workpieces yuav tig txheeb ze rau ib leeg. Raws li tau hais los saum no, cov dents tseem nyob ntawm qhov chaw ntawm cov khoom siv los ntawm lub cuab yeej. Cov cuab yeej nws tus kheej muaj lub neej ua haujlwm tsawg, vim kev yaig ntawm nws lub dav hlau ua haujlwm. Ntawm qee cov ntsiab lus, cov khoom ntawm cov khoom yog welded rau lub cuab yeej. Qhov no ua rau hnav ntawm lub cuab yeej. Kev kho cov cuab yeej siv nrog ntau yam kev nyuaj. Lawv muaj feem xyuam rau qhov tseeb tias cov cuab yeej nws tus kheej ua raws li lub hauv paus ntawm ib qho kev sib cais ntawm ib chav tsev tsim, kev teeb tsa thiab qhov ntev uas yog tsim raws nraim rau kev khiav hauj lwm zaus.

khoom npaj thiab hom tsis

Ua ntej ua ultrasonic vuam, nws tsis yog yuav tsum tau ua txhua yam kev ntsuas nrog rau saum npoo ntawm qhov chaw. Yog tias xav tau, koj tuaj yeem ua kom muaj kev ruaj ntseg ntawm qhov zoo ntawm kev sib txuas. Ua li no, nws yog advisable tsuas yog degrease cov khoom nrog ib tug hnyav. Rau kev koom nrog cov hlau ductile, lub voj voog nrog lub mem tes ncua kev txheeb ze rau qhov pib ntawm ultrasound yog pom zoo. Nrog rau qhov nyuaj ntawm cov khoom, nws raug nquahu kom tos kom sov me ntsis ua ntej qhib lub ultrasound.

Vuam qauv

Muaj ob peb yam. Cov txheej txheem thev naus laus zis ntawm ultrasonic vuam sib txawv ntawm cov cuab yeej oscillations. Lawv tuaj yeem yog torsional, khoov, longitudinal. Tsis tas li ntawd, cov tswv yim txawv nyob ntawm qhov chaw nyob ntawm cov cuab yeej txheeb ze ntawm qhov chaw welded, nrog rau cov txheej txheem ntawm kev hloov compressive quab yuam rau cov khoom thiab cov qauv tsim ntawm cov khoom txhawb nqa. Rau contour, seam thiab taw tes sib txuas, variants nrog khoov thiab longitudinal vibrations yog siv. Ultrasonic kev txiav txim tuaj yeem ua ke nrog cov cua kub hauv zos ntawm qhov chaw los ntawm qhov chaw sib cais. Nyob rau hauv cov ntaub ntawv no, ib tug xov tooj ntawm zoo yuav ua tau tiav. Ua ntej tshaj plaws, koj tuaj yeem txo qhov amplitude ntawm oscillations, nrog rau lub zog thiab lub sijhawm ntawm lawv cov kis. Lub zog lub zog ntawm lub thermal mem tes thiab lub sij hawm ntawm nws superposition ntawm ultrasound ua raws li qhov tsis ntxiv ntawm cov txheej txheem.

Thermal effect

Ultrasonic vuam yog nrog los ntawm qhov kub thiab txias ntawm qhov sib koom ua ke. Cov tsos ntawm cov cua sov yog tshwm sim los ntawm cov tsos ntawm kev sib txhuam ntawm qhov chaw ntawm cov khoom sib cuag, nrog rau cov yas deformations. Lawv, qhov tseeb, nrog rau kev tsim ntawm ib qho kev sib koom ua ke. Qhov kub ntawm qhov chaw sib cuag yuav nyob ntawm qhov tsis muaj zog. Qhov tseem ceeb yog qhov hardness ntawm cov khoom. Tsis tas li ntawd, nws cov khoom siv thermophysical tseem ceeb heev: thermal conductivity thiab kub muaj peev xwm. Cov kev xaiv vuam hom kuj cuam tshuam rau qhov kub thiab txias. Raws li kev xyaum qhia, cov nyhuv thermal tshwm sim tsis ua raws li kev txiav txim siab. nwsyog vim lub fact tias lub siab tshaj plaws lub zog ntawm cov pob qij txha nyob rau hauv cov khoom yog tiav ua ntej lub kub nce mus rau lub limiting theem. Nws muaj peev xwm txo tau lub sijhawm ntawm kev sib kis ntawm ultrasonic vibrations los ntawm preheating qhov chaw. Qhov no kuj yuav ua rau kom muaj zog ntawm kev sib txuas.

Zaj lus

Ultrasonic vuam tam sim no yog ib qho tseem ceeb ntawm kev koom nrog hauv qee qhov kev lag luam. Txoj kev no tshwj xeeb tshaj yog dav hauv microelectronics. Ultrasound tso cai rau koj los txuas ntau yam ntawm cov yas thiab cov ntaub ntawv nyuaj. Niaj hnub no, kev tshawb fawb tau ua haujlwm zoo los txhim kho cov cuab yeej vuam thiab thev naus laus zis.