SU1700659A1 - Method of contact joint - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to increase the reliability of the connection of a multiwire copper conductor with a conductor of more rigid metal. The method consists of parts 2, 1, in the execution of the contact element 2 formed by two parallel cuts 3 and 4 on a flat plastic base 1. Between the contact element 2 and the base 1 in sections 3 and 4 have stranded copper conductor 5 and conductor 6 of a more rigid metal. At the same time, the conductor 6 is bent by the U-shaped loop 7 around the conductor 5 so that its branches are located on both sides of the conductor 5. When mounted, a pulling force is applied to the conductor 6, jamming the loop 7 in the gap, and then squeezing the contact element 2 s base 1. The method eliminates the cutting of the conductor 5, providing high-quality marking. The resulting cold welded joint forms four consecutive contact areas, providing mechanically strong contact. 3 il. with s

Description

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The invention relates to electrical engineering, in particular to electrical connecting devices, and can be applied in the junctions connecting conductors with heating elements.

The aim of the invention is to improve the reliability of the connection of stranded copper conductor with a harder metal conductor.

FIG. 1 shows a connection with inserted conductors; in fig. 2 - the same, after deformation of the contact element; in fig. 3 - the same, side view.

The contact joint includes a base 1, made in the form of a flat plastic plate with a contact element 2, formed by two parallel cuts 3 and 4 in the base 1. Between the contact element 2 and the base 1, into which it is pressed to align the planes of the outer surfaces, in the cuts 3 and 4 are stranded copper conductor 5 and conductor 6 of a more rigid metal. The conductor 5, introduced into the cut 3, bends around the contact element 2 and its end is drawn through the cut 4. The conductor 6 is inserted through the cut 4, bending around on the same side as the conductor 5, the contact element 2, on the one side of the conductor 5, passed through the cut 3, is curved by a U-shaped loop 7 around conductor 5, passed through a cut 3, bending a contact element 2 on the other side of the conductor 5 and its end is drawn through a cut 4.

The method of making the contact joint includes the formation of the contact element 2, in which the conductors 5 and 6 are brought, bending the end of the conductor 6 by the loop 7, which is tightened as tightly as possible, by applying a pulling force to the conductor 6, thereby ensuring that the loop 7 is wedged in the gap and tight its coverage along the surface of the conductor 5. Pressing the base 1 with the co-induced element 2 along the plane introduces the contact element into sections 3 and 4, aligning the planes of the contact element 2 with the planes of the base 1.

When squeezing the base 1 with the contact element 2, the rigid conductor 6 limits the approach of the edges of the edges of the contact element 2 in sections 3 and 4 with the edges of the base 1 in these sections, excluding the biting of the conductor 5, and located on both sides of this conductor fluffing along the cut, providing high-quality crimping. On the other hand, conductor 6 causes plastic deformation of the base material 1 and the contact element 2 at the ends of the cuts 3 and 4 and, due to the simultaneous shear deformation, provides cold welding of the material of its coating with the base material 1 and the contact element 2. At the expense of four points of contact areas ( as you approach the end of the conductor 5 with the successive cuts) and increased

the electrical resistance of the conductor 6 is obtained; four series-connected backup contact connections. At the beginning of operation, the main current load falls on the most

remote contact As it grows older and the current resistance increases, the load transfers to the contact, from which the conductor leaves loop 7, then to contact behind loop 7, and finally to the contact located at the end of the conductor 6. Thus, the resource due to fourfold consecutive contact reserve increases by 4 times.

When exposed to tensile loads exceeding the maximum permissible for contact, conductor 6 increases the strength of the connection by tightening the loops 7 of the conductor 7, bringing it almost to the strength of whole conductors.

Thus, the method provides a reliable electrically and mechanically strong contact operating in the most severe conditions of heating devices that are not maintained during operation.

Claims (1)

Claim method The method for making a contact joint is that a contact element is cut down in a flat plastic base, bent away from the base plane, a conductor is inserted under the contact element, and a contact reconstruction element is pressed in so that the conductor is clamped in the cutout between the contact element and a base, characterized in that, in order to increase the reliability of the connection of the stranded copper conductor with the conductor of a more rigid metal, the contact element is cut down in the form of a jumper bounded by two parallel cuts, a conductor made of more rigid metal is inserted into the cut-outs with a U-shaped loop, which envelopes the copper conductor, so that the branches of the loop are located on both sides of the copper conductor, and before pressing the contact element in, they tighten the loop from a harder metal pulling force. NJ 4t