JPH05266962A - Manufacture of brush contact - Google Patents

Abstract

PURPOSE:To increase welding strength by providing a linear streak projection on a heavey block base, so that the base end part of a brush can be stably welded in an upper surface required position on the heavey block base. CONSTITUTION:A linear streak projection 13 of circular arc section is formed by cutting work in one end part of an upper surface of a heavy block base composed of phosphor bronze having a stepped part. A spacer 16 is mounted on the base end part of a wire bundle 15 in which ten wire rods 14 are parallelly lined up to be focused on this projection 13. After a circular arc- shaped contact part 17 is formed in the point end of this wire bundle 15, the intermediate in a lengthwise direction is bent to mold a brush 18. This brush 18 is placed orthogonal to the projection 13, and the base end part of the brush is resistance-welded to obtain a brush contact 19' for a slip ring. By this method, heat, when electrification welded, is concentrated to the projection 13 to melt it, and the base end part of the brush 18 is stably welded to provide high welding strength and further stabilized with small unevenness.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to a method of making brush contacts, such as brush contacts for slip rings.

[0002]

2. Description of the Related Art Conventionally, in order to make a brush contact, for example, a brush contact for a slip ring, a thick base material as shown in FIG.
As shown in FIG. 6, a spacer 16 is attached to a base end portion of a wire bundle 15 in which a large number of wire rods 14 are aligned and focused in parallel, and a contact portion 17 is formed at a tip end of the wire bundle at a required position on the upper surface of the upper end in a longitudinal bending direction. The base end of the brush 18 was resistance-welded as shown in FIG. 7 to form the brush contact 19 for the slip ring. By the way, if the base end portion of the brush 18 is directly resistance-welded to the required position on the upper surface of the thick base material 11 as described above, heat is absorbed by the thick base material 11, the welding becomes unstable, and the welding strength becomes low. There was a risk of peeling during use.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention is intended to provide a method of manufacturing a brush contact which can stably weld the base end portion of the brush to a required position on the upper surface of the thick base material and can increase the welding strength. It is a thing.

[0004]

A method for manufacturing a brush contact according to the present invention for solving the above-mentioned problems comprises forming a projection of a filament by pressing or cutting at a required position on the upper surface of a thick base material. In the projection, a large number of wire rods are arranged in parallel and bundled. A spacer is attached to the base end of the wire bundle and a contact portion is formed at the tip. It is characterized by making contact points.

[0005]

As described above, according to the method of manufacturing the brush contact of the present invention, the projection of the linear strip is formed at a required position on the upper surface of the thick base material, and the base end portion of the brush is resistance-welded to this projection. Heat concentrates on the projection, the projection melts, the base end of the brush can be welded stably, and the welding strength increases. In addition, since the heat during energization is concentrated on the projection, stable welding can be performed with a small current. Therefore, a brush contact that does not peel off during use is obtained.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a brush contact of the present invention and a conventional example will be described. First, the embodiment will be explained. As shown in FIG. 1, one side is 10 mm in length, 5 mm in width, and 7 mm in thickness.
10 mm in length of a thick base material 11 made of phosphor bronze having a step portion 10 of
As shown in FIG. 2, a projection 13 having a width of 0.3 mm and a height of 0.13 mm and an arc-shaped cross section is formed on one end of the other side upper surface 12 having a width of 3 mm and a thickness of 2 mm by cutting. As shown in Fig. 3, the wire diameter is 0.3mm and the length is 7mm.
The spacer 16 of 0.2 mm in thickness, 5 mm in length and 2 mm in width is attached by welding to the base end of the wire bundle 15 in which 10 wire rods 14 made of AgPd alloy are aligned and bundled in parallel. As shown in FIG. 4, a brush 18 formed by bending the middle of the upper longitudinal direction in which 17 is formed is orthogonally crossed, and its base end portion is resistance-welded to obtain a slip ring brush contact 19 '.

A conventional example will now be described. As shown in FIG. 5, a thick base material 11 made of phosphor bronze having a step portion 10 having a length of 10 mm, a width of 5 mm, and a thickness of 7 mm on one side, has a length of 10 mm and a width of 3 mm. , At the end of the upper surface 12 on the other side with a thickness of 7 mm, as shown in FIG.
0.2mm thick and 5mm long at the base end of wire bundle 15 in which 10 wire rods 14 made of AgPd alloy 0.3mm in length and 7mm in length are aligned in parallel.
mm, 2 mm wide spacer 16 is attached by welding to the tip 1.5
As shown in FIG. 7, a brush 18 formed by bending and forming an intermediate portion in the upper longitudinal direction in which an arc-shaped contact portion 17 of mmR was formed was resistance-welded to obtain a slip ring brush contact 19.

Welding strength of the brush 18 with respect to the upper surface 12 of the thick base material 11 of 100 brush contacts for slip rings of the embodiment and the conventional example thus obtained was measured, and the conventional example had an average of 2 kgf and a variation of 4 kgf. While it was
In the example, the average was 8 kgf and the variation was 3 kg / mm, and the welding strength was remarkably high and stable compared to the conventional example.

[0009]

As described above, according to the method of manufacturing the brush contact of the present invention, the projection is provided on the upper surface of the thick base material, and the base end of the brush is resistance-welded to the projection. The projection is melted and the base end of the brush is welded stably, so that the welding strength is high and the dispersion is small and stable. In addition, since the heat when energized is concentrated on the projection, stable welding with high strength can be performed with a small current. Therefore, it is possible to obtain a brush contact that is not likely to peel during use.

[Brief description of drawings]

FIG. 1 is a diagram showing a process of an embodiment of a method for manufacturing a brush contact of the present invention.

FIG. 2 is a diagram showing steps of an embodiment of a method for manufacturing a brush contact of the present invention.

FIG. 3 is a diagram showing steps of an embodiment of a method for manufacturing brush contacts of the present invention.

FIG. 4 is a diagram showing steps of an embodiment of a method for manufacturing brush contacts of the present invention.

FIG. 5 is a diagram showing steps of an example of a conventional method for manufacturing a brush contact.

FIG. 6 is a diagram showing steps of an example of a conventional method for manufacturing a brush contact.

FIG. 7 is a diagram showing steps of an example of a conventional method for manufacturing a brush contact.

[Explanation of symbols]

 11 Base material 12 Top surface 13 Projection 14 Wire rod 16 Spacer 17 Contact part 18 Brush 19 'Slip ring brush contact

Claims (1)

[Claims] 1. A projection of a wire is formed by pressing or cutting at a required position on the upper surface of a thick base material, and a spacer is attached to the base end of a wire bundle in which a large number of wire materials are aligned and focused in parallel to this projection. A method for manufacturing a brush contact, comprising forming a contact portion at a tip end, and making a brush contact point by orthogonally bending a brush whose longitudinal direction is formed by bending to make a base end portion thereof by resistance welding.