SU1571715A1 - Contact pair and method of manufacturing same - Google Patents

Abstract

The invention relates to electrical engineering. The aim of the invention is to increase the reliability of the connection by reducing the transient resistance. The sleeve 8 is fixed on the housing 6 of the socket. A regular micro-relief of convex-concave shape is applied on the inner surface of the spring petals of the collet 11 and on its inlet part. The pin consists of a conical lead-in part, a contact surface, a cylindrical part with a collar and an installation part. The contact surface is made with a regular microrelief of a convex-concave shape. The regularity of processing, the size and shape of the microrelief of the contact surface 2 pins and the inner surface of the collet of the socket are identical. The identity of the pin and socket micro-relief provides a reduction in the transient resistance by increasing the effective contact area. 2 sec. f-ly, 8 ill.

Description

The invention relates to devices and methods for the manufacture of electrical connectors intended for operation in DC, pulsed, alternating current circuits and can be used in the electronic and radio industry.

The purpose of the invention is to increase the reliability of the connection by reducing the transient resistance.

FIG. 1 shows a pin; in fig. 2 - nest; in fig. 3 is a section A-A in FIG. one; in fig. 4 shows the implementation of cold plastic deformation (vibro-roll) for a pin; in fig. 5 - the same for the nest; in fig. 6 - profilogram of the contact surface treated with cold plastic deformation; in fig. 7 is a profilogram of a ground contact surface; FIG. 8 shows current lines leading to micro-sites of contact in a contact pair.

The contact pair consists of a pin (Fig. 1) and a socket (Fig. 2 3) The pin consists of a conical lead-in part 1, a contact cylindrical surface 2, a cylindrical part 3, with which the pin is centered in the hole of the fork insulator, shoulder 4, which pin is held in the insulator, mounting part 5, with which the pin is connected to the wire. The contact surface 2 above the conical lead-in part 1 is made with a regular microrelief of convex-concave shape. The nest (Fig. 2) consists of a body 6, a press-fit and a sleeve 8 sealed at four points 7. The shoulder 9 is intended to fasten the nest to the ground

XS

SP

l torus sockets. Using mounting hour

These 10 sockets are connected to the wire. The case of the socket 6 has a contact element, which is a collet 11 with spring lobes 12 and 13 (Fig. 3). The petals are separated by a notch 14 and, in parts of the length of the contact element, are pressed to the axis of the socket, R is the lead radius. The contact surface of the collet 15 is lower than the conic lead-in part; the lead-in radius R is made with a regular microrelief of convex-concave shape.

The method for making the contact pair is as follows.

As blanks for the pin and the socket use a material with good electrical and spring properties, such as bronze BROC 4-3, BrNHK 2,5-0,7-0,6. Mechanical processing of the pin and the socket is carried out by known methods. Get the exact dimensions of the contact surface turning - for the pin, drilling - for the socket. Sand these surfaces to a purity of 0.63. After that, the contact surfaces are affected by cold plastic deformation - vibro-roll. The blank Shgyr 16. (Fig. 4) is installed at 17 h 18 centers, which are informed by the rotational motion of pz 1. The vibro-head 19c oscillates at frequency Pdv.x1 of the deforming element (ball) cH with Si feed, with amplitude of oscillation of the ball ei, force Pi processes the contact surface 20 of the workpiece pin 16 vibro-roll. The blanks / shells of the socket 21 (FIG. 5) are installed in process mandrels 22 and 23 to provide rigidity at the vibro-roll site. This workpiece together with the mandrel rotate with a frequency pz2. The vibration head 24 with frequency Pdvh2 and the amplitude of oscillation of the deforming ball e., With a force P2, feed S2 processes the contact surface 25 and the entry radius R of the workpiece socket 21. Next, the groove 14 is cut through (Fig. 3), the spring petals 12 are crimped and 13 until the forces of dissection with the control pin gauge according to the specifications for the connector. Electroplating is prescribed and applied based on the operating conditions and requirements for the contact pair (gold plating, silver plating, nickel plating, etc.). Then the sleeve 8 (figure 2) is pressed onto the collar of the housing 6 nests-. yes and the core in four places 7. The contact socket assembly is subjected to thermostatic control. Control of the force of the articulation - dissection with the control pin is carried out with a caliber,

From the point of view of obtaining the maximum number of microcontact sites,

the total area of which is equal to the effective contact area Aeff, in the process of interaction of the pin with the socket along the contact surfaces, the following requirements are imposed on the conditions of cold plastic deformation (vibro-roll): CHE12; Pdv .. x2; . These conditions for the identity of the pin and socket machining make it possible to obtain a microrelief on contact surfaces with a constant step T and a height of asperities R2 (Fig 6) as compared with the chaotic and uneven microrelief peaks at the contacts (Fig. 7). In the contact pair on the contact surfaces, the microscopic irregularities have no peaks. The micro site of contacting FJ (Fig. 8) has a large area with contact pairs. By passing current

from the pin to the socket and vice versa, the curvature of the current lines 26 to the large microplate (Fj) is smaller, which means that the resistance of the tension in this case will be less.

The total contact resistance of the contact pair is reduced by increasing the effective contact area Aeff and decreasing the resistance to shrinkage.

thirty

Claims (2)

Invention Formula i.Contact pair containing a pin with a conical lead-in part and a socket consisting of a cylindrical body with a lead-in hole, in the cavity of which the contact element of a cylindrical shape is rigidly fixed, which is a collet with a conical lead-in part, the petals of which are part of the length pressed to the nest axis, characterized in that, in order to increase the reliability of the connection by reducing the transient resistance, the contact surface of the pin above the conical lead-in part and the contact surface of the collet below the conical lead-in part are made with a regular microrelief of a convex-concave shape. 2. A method of making a contact pair of pop. 1, consisting in mechanical machining of the pin and collet, their electroplating, crimping of the petals of the collet, thermostating and assembling of the jack, due to the fact that after machining the contact surfaces The pin and the sockets above and below the conical lead-in parts, respectively, are subjected to cold plastic deformation, while the regularity of processing, the size and shape of the deforming elements of the pin and the collet are chosen identical. 2.% one/ W ЈЗПф 91 / .1 / SI $ f SP f / t Fi & b Fig l