Yuav ua li cas teeb meem yuav tsum tau them sai sai rau nyob rau hauv lub vuam txheej txheem ntawm ultrasonic vuam tshuab?

【1】 Tom qab ultrasonic vuam, cov khoom ib txwm kub hnyiab ntawm ib sab

Ultrasonic vibration welding tsis yog ib qho yooj yim linear longitudinal kev co (flexural thiab transverse kev co tsis suav nrog hauv qhov kev sib tham), tab sis tus ntoo khaub lig hom longitudinal downward co. Lub zog ntawm ultrasonic tso zis kawg ntawm lub sab sauv hom kuj muaj ib tug tej yam lub zog tis taw tes. Txawm hais tias lub siab, qhov hluav taws xob thiab lub tshuab txiav txim siab qhov kev ruaj ntseg ntawm lub zog tso zis hluav taws xob, lub zog xa hluav taws xob tseem qhia tau tias qhov sib npaug nce lossis txo qis.

Yog tias nws pom tias cov khoom lag luam ib txwm scalded ntawm ib qho taw tes thaum lub sij hawm ultrasonic vuam, nws txhais tau hais tias cov zis zog ntawm qhov taw tes ntawm cov pwm sab saud sib raug rau cov kev ntxhov siab tsim ntawm qhov khoom no. Lub sijhawm no, yog tias qhov kev sib cuag ntawm qhov chaw ultrasonic vibration tau hloov, qhov scald tshwm sim los ntawm thermal zog pob tuaj yeem txhim kho.

Ultrasonic welding yog cov cuab yeej siv high-tech rau vuam cov khoom siv thermoplastic. Txhua yam ntawm cov thermoplastic nplaum qhov chaw tuaj yeem kho los ntawm ultrasonic vuam yam tsis ntxiv cov kuab tshuaj, nplaum lossis lwm yam khoom pabcuam. Nws qhov zoo yog ua kom cov khoom tsim tau, txo tus nqi thiab txhim kho cov khoom zoo.

Ultrasonic yas vuam txoj cai: 20kHz (los yog 15KHz) high-voltage thiab high-frequency signals yog generated los ntawm lub generator. Cov teeb liab raug hloov mus rau hauv high-frequency mechanical vibration los ntawm lub zog hloov dua siab tshiab, uas yog siv rau cov khoom yas thiab cov khoom ua haujlwm.

Kev sib txhuam ntawm qhov chaw ua hauj lwm thiab cov molecules sab hauv ua rau qhov kub thiab txias xa mus rau qhov sib txuas kom nce. Thaum qhov kub ncav cuag lub melting point ntawm lub workpiece nws tus kheej, lub vuam interface ntawm lub workpiece yuav yaj sai sai, thiab ces sau qhov sib txawv ntawm lub interfaces. Thaum lub vibration nres, lub workpiece

Nyob rau tib lub sij hawm, nws yog txias thiab zoo li tus nyob rau hauv tej lub siab kom ua tiav zoo meej vuam.

【2】 Yuav daws qhov teeb meem ntawm ultrasonic vuam thaum fais fab tuag li cas

Analysis vim li cas:

1. Lub ammeter txav tom qab pib

2. Lub ammeter tsis txav tom qab pib

daws:

1. Xyuas seb lub mainboard puas puas thiab kho lub mainboard

Nws tsis yog qhov teeb meem loj, nws yuav cuam tshuam

【3】 Kev cuam tshuam ntawm cov khoom siv yas ntawm ultrasonic vuam

1. Lub ultrasonic yoj propagates nyob rau hauv cov yas qhov chaw, thiab cov yas qhov chaw nqus thiab attenuate lub ultrasonic zog ntau los yog tsawg, yog li muaj ib tug tej yam kev cuam tshuam rau lub ultrasonic ua nyhuv. Cov yas feem ntau muab faib ua amorphous cov ntaub ntawv thiab cov kua nplaum nyuaj raws li qhov hardness

Kuj tseem muaj qhov sib txawv ntawm cov roj hmab mos thiab cov qauv. Feem ntau hais lus, kev ua haujlwm ultrasonic ntawm cov yas nrog lub siab hardness thiab qis melting point yog zoo dua li cov yas uas tsis tshua muaj hardness thiab siab melting point. Yog li ntawd, qhov no cuam tshuam qhov teeb meem ntawm qhov kev ncua deb ntawm ultrasonic machining,

2. Kev cuam tshuam ntawm kev ua haujlwm ntawm cov khoom yas ntawm ultrasonic vuam

Cov ntaub ntawv sib txawv ntawm cov khoom yas xws li txhaj tshuaj molding, extrusion lossis tshuab moulding thiab cov txheej txheem sib txawv yuav muaj qee yam cuam tshuam rau ultrasonic vuam.

A: Humidity defect: cov av noo tsis xwm yeem yog feem ntau tsim nyob rau hauv tus txheej txheem ntawm ua striped los yog xoob yas qhov chaw. Cov av noo tsis zoo attenuates lub zog muaj txiaj ntsig thaum lub sijhawm vuam, ua rau lub sealing txoj hauj lwm dej seepage, thiab lengthens lub sij hawm vuam. Yog li ntawd, cov khoom yas nrog cov av noo siab yuav tsum tau qhuav ua ntej vuam. Xws li polyoxymethylene.

B: Kev cuam tshuam ntawm kev txhaj tshuaj molding txheej txheem:

Kev hloov ntawm cov txheej txheem txhaj tshuaj yuav ua rau muaj qhov tsis xws luag hauv qab no:

① Dimensional hloov (shrinkage, dabtsi yog khoov deformation)

② Kev hloov pauv hnyav

③ Kev puas tsuaj saum npoo

④ Tsis zoo ib yam

C: Lub sijhawm khaws cia: tom qab cov khoom yas tau ua tiav los ntawm kev txhaj tshuaj molding, lawv feem ntau muab tso rau tsawg kawg 24 teev ua ntej vuam kom tshem tawm cov kev ntxhov siab thiab deformation ntawm cov yas. Cov khoom yas ua los ntawm cov yas amorphous los ntawm kev txhaj tshuaj molding yuav tsis ua raws li qhov yuav tsum tau ua.

D: Recycled yas

Recycled yas muaj zog tsis zoo thiab tsis zoo adaptability rau ultrasonic vuam. Yog li ntawd, yog tias siv cov yas rov ua dua tshiab, ntau qhov tsim qauv yuav tsum raug txiav txim siab raws li qhov tsim nyog.

E: Tso tus neeg sawv cev thiab impurities

Tso tawm tus neeg saib xyuas thiab impurities muaj qee yam cuam tshuam rau ultrasonic vuam. Txawm hais tias cov kuab tshuaj thiab impurities ntawm qhov chaw ua haujlwm tuaj yeem raug shaken tawm thaum lub sijhawm ua haujlwm ultrasonic, nws tsis tas yuav tsum tau muab khi lossis ua haujlwm nyob rau hauv siab ultrasonic yoj.

Lub suab nthwv dej uas nws zaus siab tshaj qhov txwv ntawm tib neeg hnov ​​​​lus (txog 20000 Hz) hu ua ultrasonic yoj, lossis ultrasonic yoj.

tshaj