JPH06111915A - Manufacture of slide brush material - Google Patents

Abstract

PURPOSE:To manufacture a slide bruch material having a wire bundle forward end part having no thermal effects at a favorable yield by forming a bundle of wire materials, welding it with a spacer, and then cutting the wire bundle at a necessary length. CONSTITUTION:For thin wires 1 of material SP-1 (Ag by 30%-Pd by 35%-Au by 10%-C6u by 14%-Zn by 1%), and of a wire diameter of 0.08mm, 14 of them are collected by a collecting jig 7 to be fed as a wire bundle 2. A forward end of the wire bundle 2 is then positioned by an applying jig 8. This is resistance-welded by an upper electrode 11 and a lower elecode 10 with a spacer 3 of materialof CuNi, and sizes of 1.0X0.2X10mm, having projections of 0.16mm wide, and 0.08mm high set and positioned at a recessed part 9 in an upper surface of the lower electrode 10. It is then cut in a length of 4.5mm by a cutter 12 to be a slide brush material 4'.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an encoder, a trimmer,
The present invention relates to a method of manufacturing a sliding brush material for manufacturing a sliding brush used for a potentiometer, various other sensors and the like.

[0002]

2. Description of the Related Art Conventionally, as one of the methods for producing a sliding brush, a spacer 3 is sequentially welded to a multi-filament bundle 2 in which a large number of precious metal fine wires 1 are bundled as shown in FIG. As shown in FIG. 4, a sliding brush material 4 (tip brush) with a spacer 3 was used. However, during welding of the spacer, the ultrafine wire is softened by heat and softened or the crystal becomes coarse, and that part becomes the contact part of the sliding brush, and the contact characteristics, especially the initial characteristics, are extremely unstable. There was a fear of becoming. For this reason, the cutting part of the multi-wire bundle after welding is cut at a part that is away from the spacer and is not affected by heat.For this reason, it is not possible to minimize the amount of expensive precious metal ultrafine wire used, and waste. And the yield was poor.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and provides a method for producing a sliding brush material having a contact portion which is not affected by heat.

[0004]

The invention is characterized in that after wire rods are bundled into a multi-wire bundle, this is welded to a spacer, and then the multi-wire bundle is cut into a required length.

[0005]

According to the method of manufacturing a sliding brush material of the present invention configured as described above, a multi-wire bundle is welded to the spacer,
Since it is then cut, a multi-wire bundle tip portion that is not affected by heat can be obtained with good yield. It should be noted that whether the tip of the multi-filament bundle of the sliding brush material is bent and then welded to the spring material, or whether the tip of the multi-filament bundle is bent and formed after welding the sliding brush material to the spring material is appropriately performed. Of course, or it can be used as a sliding brush without bending the tip of the multi-wire bundle.

[0006]

EXAMPLES Examples and conventional examples will be described below. First, as an example, as shown in FIG. 1, the material SP-1 (Ag30
% Pd35% Au10% Pt10% Cu14% Zn1%), wire diameter
The 0.08 mm precious metal ultrafine wires 1 are converged by 14 focusing jigs 7 and fed as a multifilament bundle 2, and the tip of the multifilament bundle 2 is positioned by the attaching jig 8 and the top surface of the lower electrode is concave. Material positioned and set in part 9 CuNi 30%, dimension 1.0 x
The spacer 3 having a projection of 0.2 × 10, width 0.16, and height 0.08 is resistance-welded with the lower electrode 10 and the upper electrode 11, and then cut with a cutter 12 to a length of 4.5 mm, as shown in FIG. A sliding brush material 4'was obtained. The same process was repeated to make 100 pieces.

[0007]

2. Description of the Related Art Next, as a conventional example, as shown in FIG. 3, a wire material having the same material, wire diameter and number as the embodiment is focused by a focusing jig 13 and fed as a multi-wire bundle 2, and then the upper electrode of the lower electrode is concave. The spacer 3 having the same material and dimensions as those of the embodiment set and positioned in the portion 14 is electrically resistance welded and fed by the lower electrode 15 and the upper electrode 16, and then the spacer 3 is placed in the concave portion 18 on the upper surface of the cutter 17. The set multi-wire bundle 2 was cut into a length of 4.5 mm by a cutter 17 to obtain a sliding brush material 4 as shown in FIG. The same process was repeated to make 100 pieces. However, as a result of conducting a quality inspection and checking the presence or absence of the heat influence on the tip portion, the heat influence was confirmed in the conventional example, whereas the heat influence was not found in the embodiment.

[0008]

As described above, according to the method for manufacturing the sliding brush material of the present invention, since the multi-wire bundle is welded by the spacer and then the multi-wire bundle is cut, the tip of the multi-wire bundle having no thermal influence is provided. It has an excellent effect that the sliding brush material can be produced with high yield.

[Brief description of drawings]

FIG. 1 is a diagram showing a manufacturing process according to a manufacturing method of a sliding brush material of the present invention.

FIG. 2 is a diagram showing a sliding brush material obtained by the method for manufacturing a sliding brush material of the present invention.

FIG. 3 is a diagram showing a manufacturing process according to a conventional method for manufacturing a sliding brush material.

FIG. 4 is a diagram showing a sliding brush material obtained by a conventional manufacturing method.

[Explanation of symbols]

 2 Multi-wire bundle 3 Spacer 7 Focusing jig 10 Lower electrode 11 Upper electrode 12 Cutter

Claims (1)

[Claims] 1. A method for producing a sliding brush material, which comprises bundling wire rods into a multi-wire bundle, welding this to a spacer, and then cutting the multi-wire bundle to a required length.