Lub zog hloov tshuab ntawm Yas Ultrasonic Vuam
Lub ntsiab lus ntawm ultrasound:
Ultrasound hais txog lub suab tsis tshaj qhov ntau zaus uas tib neeg hnov tau txais tau. Tib neeg hnov lus muaj peev xwm nyob nruab nrab ntawm 20Hz thiab 20KHz; Yog li ntawd, feem ntau hais lus, txhua lub suab tsis muaj zaus siab dua 20KHz yog hu ua ultrasonic tsis. Txawm li cas los xij, hauv cov ntawv thov kev lag luam, txhawm rau ua kom tau raws li cov txheej txheem tshwj xeeb, lub suab nthwv dej zaus qis dua 10KHz (xws li lub tshuab ziab khaub ncaws ultrasonic), 15KHz (xws li yas ultrasonic vuam tshuab), cov no tseem hu ua ultrasonic nthwv dej hauv tus cwj pwm. Qhov kev txwv sab saud ntawm ultrasound zaus feem ntau yog nyob rau hauv 100KHz, tab sis hauv kev kuaj mob tsis muaj kev puas tsuaj, kuj tseem muaj txog 5000KHz. Txhua yam nyob rau hauv tag nrho, kev lag luam feem ntau yuav siv lub zog los tsim thiab siv ntau yam xov xwm los ua, thiab cov kev hloov pauv ntawm ntau lub zog thiab cov teebmeem raug tsim tawm nrog cov yam ntxwv sib txawv ntawm ntau yam xov xwm, uas yog sib sau ua ke hu ua ultrasonic nthwv dej.
Lub hauv paus ntsiab lus ntawm ultrasonic vuam:
Lub suab nthwv dej xa mus rau cov khoom siv yas los ntawm ultrasonic vuam taub hau (HORN), thiab kev co yog 15 ~ 30KHZ ib ob, thiab lub amplitude yog li ntawm 4 ~ 5um. High-frequency vibration ntawm txog 20-30um tshwm sim ntawm qhov sib koom ua ke ntawm cov khoom yas. Nyob rau hauv txoj kev no, qhov siab tshaj plaws ceev ceev ntawm qhov kawg ntawm lub vuam taub hau ntawm cov cuab yeej hlau tuaj yeem ncav cuag 4m / s. Qhov no high-frequency pounding ua rau saum npoo ntawm cov yas, thiab muaj zog kev sib txhuam thaum tshav kub kub tshwm sim nyob rau hauv qhov chaw uas muaj kev ntxhov siab heev, yog li ntawd cov yas molten ntawm lub interface yog bonded ua ke. , Yog li ua kom tiav vuam.
Lub mechanism ntawm ultrasonic vuam zog conversion:
Nyob rau hauv cov txheej txheem ultrasonic vuam, lub zog hloov dua siab tshiab ntawm qhov sib koom ua ke feem ntau yog hais txog kev hloov pauv ntawm lub zog ntawm lub tshuab ultrasonic rau hauv lub zog thermal kom fuse cov yas. Qhov kev hloov hluav taws xob no ncaj qha cuam tshuam rau qhov kub thiab txias ntawm qhov sib koom ua ke thiab cuam tshuam rau qhov zoo ntawm qhov sib koom ua ke. Vim yog qhov nyuaj ntawm cov txheej txheem vuam ultrasonic, kev tshawb fawb ntawm cov txheej txheem vuam tseem tsis txaus, thiab muaj ntau cov lus piav qhia rau nws cov txheej txheem vuam.
Tam sim no, feem ntau yog ob qho kev pom hauv qab no ntawm fusion mechanism ntawm yas ultrasonic vuam:
1) Kev sib txhuam vibration mechanism. Nws ntseeg tau tias thaum ultrasonic tsis ua rau ob qhov kev sib txuas, cov khoom yas yuav zoo siab los ntawm ultrasonic tsis ua rau muaj kev sib hloov tsis tu ncua compression thiab decompression, yog li qhov kev sib cuag ntawm lub vuam yuav tsim kev sib txhuam vim kev co. Lub vibration zaus yog qhov zaus ntawm ultrasonic tsis. Nyob rau lub sijhawm no, cov neeg kho tshuab ua haujlwm tau hloov mus rau hauv cov cua sov, uas ua rau qhov kub thiab txias ntawm qhov chaw vuam kom txog thaum nws melts, thiab thaum kawg muaj ib qho kev sib koom ua ke welded.
2) Stress-strain zog cia thiab hloov dua siab tshiab mechanism. Nws suav hais tias yas yog lub cev viscoelastic. Thaum ultrasonic nthwv dej propagate nyob rau hauv nws, kev nyuaj siab thiab strain ntawm cov yas hais yog txawv, uas ua rau lub zog poob, uas yog hloov dua siab tshiab rau hauv tshav kub kom yaj lub nto ntawm lub weldment los tsim ib tug sib koom ua ke.
