النتائج (
العربية) 1:
[نسخ]نسخ!
Corresponding author. Tel.: +40 256 200 222; fax: +40 256 492 797.E-mail addresses: mariana.ilie@mec.upt.ro, milie@isim.roKeywords: Laser welding; Semitransparent Polymers; Numerical simulation; Experimental designIntroductionIn through-transmission laser welding of polimeric materials a focused laser beam is directed attwo overlapping thermoplastic parts: first designed to be transparent to the laser wavelength and asecond one, absorbent in IR spectrum. Between the laser beam and the components to be assembledthere is a relative motion which allows a continuously operating laser beam to irradiate a line of aspecific width. The heat generated by absorption is transmitted to the transparent component byconduction. The bonding between the two components occurs by the interpenetration of the molecularchains in this area. Since this phenomenon is very active in a "fluid" state of matter, the temperature atinterface has to be between the temperature of solid-liquid transition and the initial temperature ofdegradation of the thermoplastic materials [1]. Comparing to the traditional welding techniques, thelaser welding efficiency is strongly dependent on the materials properties. In consequence, obtaining ahigh-quality weld joint is conditioned by a good understanding of the material behavior under laserirradiation, based on a clear identification and modeling of the optical and thermal phenomenainvolved.Concerning the optical phenomena, particularly the laser beam attenuation in polymers, thereare some experimental approaches for quantifying the influence of fillers, pigments, reinforcement
يجري ترجمتها، يرجى الانتظار ..
