JP3085473B2 - Manufacturing method of rake type sliding contact - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a rake-shaped sliding contact.

[0002]

2. Description of the Related Art Conventionally, in order to make a rake-shaped sliding contact, a plurality of fine precious metal wires are bundled in parallel, resistance-welded to a spacer, and resistance-welded to a spring material via the spacer. A spring material with a contact of a through lay is made, cut into a certain length in the longitudinal direction, and at the same time, a slit is formed by pressing one side of the contact side. There are two methods.

In the above method, when a plurality of ultrafine wires of a noble metal are bundled in parallel, the wires often intersect and deform. Also, at the time of resistance welding, the electrode for welding has a short number of times (electrode life) at which a stable welding strength can be obtained, so that it takes time for electrode maintenance. Further, the welding speed cannot be increased. Therefore, productivity was poor and a rake-shaped sliding contact could not be efficiently produced.

In the other method, the bonding strength between the contact and the spring material is weak, and the accuracy of the contact portion is low. Furthermore, the contact point cannot be rounded at the tip of the contact in both methods, so that the contact property of the contact at the time of sliding is poor.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a high contact strength between a contact and a spring material, a reduction in the amount of noble metal at the contact,
An object of the present invention is to provide a method in which a rake-shaped sliding contact having good roundness at the time of sliding and having a rounded tip is easily formed.

[0006]

According to the present invention, there is provided a method for manufacturing a rake-shaped sliding contact according to the present invention, wherein one side end of a band-shaped spring member has an outer diameter larger than the thickness of the spring member. The circular contact wire is joined by beam welding on a flat surface obtained by cutting a part of the outer periphery in the longitudinal direction, and then the contact wire spring material is cut to a certain length. It is characterized in that one side of the contact wire side is press-cut into a rake shape.

[0007]

As described above, in the method for manufacturing a rake-shaped sliding contact of the present invention, a circular contact wire is attached to one end of a band-shaped spring material.
Since joining is performed by beam welding on the flat surface provided in the longitudinal direction of the outer periphery, the joining strength between the contact and the spring material is increased.
Also, since this spring material with contact wire is cut to a certain length and at the same time one side of the contact wire is pressed out in a rake shape,
The contact is only at the fingertip of the rake, and the amount of precious metal used is greatly reduced. Furthermore, since the tip of the contact is rounded, the contact pressure at the time of sliding increases, and accurate contact is achieved, and the contact property of the contact is improved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the method for manufacturing a rake-shaped sliding contact according to the present invention will be described. As shown in FIG. 1, the width is 15 mm and the thickness is 0.15 mm.
On one side end of a strip-shaped spring material 1 made of BeCu, a circular contact wire 2 made of Ag-CdO12% having an outer diameter of 1 mm larger than the thickness of the spring material 1 shown in FIG. A flat surface 3 having a width of mm obtained by cutting the portion in the longitudinal direction is joined by electron beam welding as shown in FIG. 3, and then the spring material 1 with the contact wire 2 is shown in FIG. At the same time, cut one side of the contact wire 2 into a rake shape at the same time as cutting it to a length of 3.4 mm, and insert a finger 4 with a length of 11.0 mm and a width of 1.0 mm into a 0.
A rake-shaped sliding contact 5 having three at 20 mm intervals was obtained.

The rake-shaped sliding contact 5 thus obtained has a high joining strength because the spring material and the contact are mutually joined by electron beam welding on flat surfaces. Also, since the contact point is only at the fingertip of the rake, the amount of precious metal used is greatly reduced. Further, since the tip of the contact is rounded, the contact pressure at the time of sliding increases and accurate contact is achieved, and the contact property of the contact is improved.

[0010]

As described above, according to the method of manufacturing a rake-shaped sliding contact of the present invention, the joining strength between the contact and the spring material is high, the amount of precious metal used in the contact is extremely small, and the tip of the contact has a rounded tip. As a result, it is possible to easily obtain a rake-shaped sliding contact having excellent contact properties during sliding.

[Brief description of the drawings]

FIG. 1 is a diagram showing steps of a method for manufacturing a rake-shaped sliding contact of the present invention.

FIG. 2 is a diagram showing steps of a method for manufacturing a rake-shaped sliding contact of the present invention.

FIG. 3 is a diagram showing steps of a method for manufacturing a rake-shaped sliding contact of the present invention.

FIG. 4 is a diagram showing steps of a method for manufacturing a rake-shaped sliding contact according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spring material 2 Contact wire 3 Flat surface 5 Rake-shaped sliding contact

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 11/06 H01R 43/12 H01H 1/26 H01H 1/00

Claims (1)

(57) [Claims] 1. A flat surface obtained by forming a circular contact wire having an outer diameter larger than the thickness of the spring material on one side end of a belt-shaped spring material by cutting a part of the outer periphery in the longitudinal direction. The rake-shaped sliding contact is characterized in that the spring material with the contact wire is cut into a certain length and at the same time, one side of the contact wire is pressed into a rake shape. Production method.