SU627880A1

SU627880A1 - Method of manufacturing microwire

Info

Publication number: SU627880A1
Application number: SU762404217A
Authority: SU
Inventors: Владимир Михайлович Колешко; Анатолий Владимирович Гулай
Original assignee: Институт Электросварки Ан Белорусской Сср
Priority date: 1976-09-16
Filing date: 1976-09-16
Publication date: 1978-10-15

Description

Изобретение относитс к области . ультразвуковой обработки материалов волочением дл электронной техники и может найти применение при получении микропроволоки, например, дл монтажа интегральных схем.The invention relates to the field. ultrasonic processing of materials by drawing for electronic equipment and may find application in the production of microwires, for example, for mounting integrated circuits.

Известен способ волочени микропроволоки с наложением ультразвуковых колебаний 1. Однако при таком методе волочени поверхность проволоки получаетс волнистой.There is a known method of drawing microwires with superimposed ultrasonic vibrations 1. However, with this method of drawing, the surface of the wire is wavy.

Целью изобретени вл етс повышение качества и однородности микропроволоки .The aim of the invention is to improve the quality and homogeneity of the microwire.

Цель достигаетс тем, что на поверхности проволоки возбуждают поверхностные акустические волны, причем частота колебаний указанных волн выше произведени частоты основных ультразвуковых колебаний на отношение скорости распространени поверхностных акустических волн к скорости волочени .The goal is achieved by the fact that surface acoustic waves are excited on the surface of the wire, and the oscillation frequency of said waves is higher than the product of the frequency of the main ultrasonic oscillations and the ratio of the propagation velocity of the surface acoustic waves to the dragging rate.

На чертеже изображено устройство, реализующее предложенный способ в наложени поверхностных акустических волн за волокой.The drawing shows a device that implements the proposed method in applying surface acoustic waves behind a wire.

Получение качественной и однородной проволоки Осуществл ют следующим образом.Production of high-quality and uniform wire. Carried out as follows.

Проволоку 1 прот гивают через калиброванное отверстие волоки 2, к которой подвод т ультразвуковые колебани от электромеханического преобразовател 3 через концентратор 4 и волновод 5. Одновременно на поверхности проволоки, как до ввода ее в волоку, так и после выхода из волоки (как это показано на чертеже ) , возбуждают поверхностные акустические волна за счет взаимодействи магнитного пол соленоида б и вихревых токов, наводиг 1ых с помощью катушки индуктивности 7. Питание соленоида осуществл ют от источника 8, а катушки индуктивности - от высокочастотного генератора 9.The wire 1 is pulled through a calibrated hole of the die 2, to which ultrasonic vibrations are delivered from the electromechanical transducer 3 through a hub 4 and a waveguide 5. At the same time, on the surface of the wire, both before it enters the fiber and after it leaves the die (as shown in drawing), excite the surface acoustic waves due to the interaction of the magnetic field of the solenoid b and eddy currents, which are induced by the first one by the inductor 7. The solenoid is powered from the source 8 and the inductors from high-frequency generator 9.

Claims

Improving the quality and homogeneity of the wire occurs by redistributing the metal between the thickened and thinned sections of the wire, due to the elastic stresses arising from the excitation of surface acoustic waves. In addition to the excitation of surface acoustic waves prior to the introduction of the wire into the fiber, the wire surface is cleaned from foreign particles that accumulate in the fiber and lead to the formation of: apapins and shells. The excitation of surface acoustic waves after the release of wires from the die improves the structure of the surface sticking layer. The choice of the oscillation frequency of surface acoustic waves depends on the speed of drawing and the frequency of the main ultrasonic oscillations. The heterogeneity of the cross-section caused by ultrasonic vibrations of a die has a periodic character, and the magnitude of the period f is commensurate with the ratio of the speed of the drawing V to the frequency f uly of the ravonic oscillations of the drawing, T.e. In order for the surface acoustic waves to experience the possible attenuation, i.e. in order for their action to be more effective, the 1G ratio should be satisfied and where Lz is the length of the surface acoustic will. From this frequency of oscillation f | surface acoustic waves are chosen higher than the product of the frequency of the main ultrasonic vibrations by the ratio of the propagation velocity C of the surface acoustic waves to the drawing speed VjTje.f -. For example, when the microwire wire speed from aluminum is about 240 m / min and the ultrasonic oscillation frequency of the die 20 kHz, the oscillation frequency of the surface acoustic waves is chosen to be 18 mHz. Claim method for producing microwire by drawing with superimposed ultrasonic oscillations, characterized in that, in order to improve the quality and homogeneity of the wire, on its surface excite from surface acoustic waves, and the frequency of oscillations of the indicated waves to the speed of dragging. Sources of information taken into account in expert 1 st: 1. Rolling and rolling equipment, Express information VINITI, 48, 1971.