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Information × Registration Number 0212U001048, 0111U002900 , R & D reports Title Development of technology and automated laser welding pipe compensating elements for aerospace and nuclear industries. popup.stage_title Head Shelyagin Vladimir Dmitrievich, Кандидат технічних наук Registration Date 11-01-2012 Organization E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine popup.description2 Created automated equipment and technology of laser welding of pipe joints elements for aerospace and nuclear industry, which allowed to obtain tight connection folds of bellows expansion joints on the strength level of 95 ... 97% on the strength of base metal (steel type H18N10T), which corresponds to the world's best performance . Found that for the manufacture of bellows expansion joints must be used impulse modulation radiation. This allows you to get in cast metal and ZTV fine-grained structure with increased mechanical properties. Made using the pulsed laser welding of bellows expansion joints have better performance properties and long term use. A method of two-ray laser welding fold bellows expansion joints, which is performed using two focused beams with different or the same wavelength and can increase the depth of penetration. To perform welding focal plane of a second beam goes deep respect for the value that is close or equal to the second hollow laser beam under free surface welded joint. For welding of bellows compensators folds proposed to conduct the process of two-ray laser welding of the two focused beams with hollow focal plane of one beam relative to the second by an amount not to exceed half the length of his neck caustic. A method of pulsed laser welding of bellows compensators folds under which locally plavlyat metal in the welding area pulses of complex shape focused laser radiation. These pulses have steep forward front and gradually falling back front. The latter contains two sloping areas, the upper of which provides melting metal, weld, without the intense evaporation, and the bottom ensures the formation of fine-grained structure of the weld by creating conditions for emergence of the maximum number of crystallization centers and minimize the linear velocity of crystal growth for metal weld. It is proposed to carry out laser welding fold bellows compensators such pulses, the lower rear area of ??the front are modulated ultrasonic frequency range with an amplitude that provides variations that destruktuyut crystallites that grow. while fragments destruktovanyh crystallites stanovlyatsya new centers of crystallization in the zonal phase transitions "liquidus - solidus." Based on the selection process manipulator kinematic scheme developed design documentation and made shostykoordynatnyy complex for one-and two-ray laser welding pipe compensating elements for aerospace and nuclear industries. Product Description popup.authors Бернацький Артемій Володимирович Бондарєва Валентина Іванівна Курило Володимир Андрійович Лукашенко Андрій Германович Мащак Володимир Васильович Палагеша Андрій Миколайович Сіора Олександр Васильович Федосєєва Ольга Вікторівна Хаскін Владислав Юрійович popup.nrat_date 2020-04-02 Close