JPS58111217A - Method of producing button type composite contact - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a manufacturing method of an L1 button type composite contact.

Conventionally, in order to make a button-type composite contact, a pace wire 1 and a contact wire 2 are joined as shown in Fig. 1aK, and then the base wire 1 and the contact wire 2 are bonded together as shown in Fig. 1bK. A cylindrical composite contact material 3 is produced by cutting to length, and then heat-treated, and then press-formed as shown in Figure CK to form a projection 4 on the lower surface of the base material 1a. A button-type composite contact 5 was made.

However, in this method of manufacturing the button-type composite contact 5,
Since the composite contact material 3 is heat treated to improve formability (heat treatment may be performed in the state of the paste, wire 1, and follower material 2), the surface layer of the base material 1a is too soft. Furthermore, in order to make the thickness of the contact material 2a uniform over the entire surface, the outer diameter of the ring projection 4 is made the same as the diameter of the base wire material 1.

Therefore, when press molding, the shape of the ring projection 4.

There was a drawback that the height was not displayed accurately in %.

The present invention has been made to eliminate such drawbacks, and
It is an object of the present invention to provide a method for manufacturing a button-type composite contact in which the nine dimensions of the ring projection shape are accurately displayed.

The method for manufacturing a button-type composite contact of the present invention involves drawing the base wire 1 as shown in FIG. 2a, and then joining the drawn pace wire 1' and the contact wire 2 as shown in FIG. Next, the joined base edge material 1' and contact wire material 2 are cut to a required length as shown in Figure cK to produce a cylindrical composite contact material 3I, and then this composite contact material 3' is made. As shown in FIG. d, the bottom surface of the base material 11m (a button holy night joint 5 having a ring projection 4) is formed by press molding.

In the method for manufacturing the button W composite contact of the present invention,
The reason for drawing the base wire 1 before joining it to the contact wire 2 is that the surface layer of the pace wire 10 is work-hardened to some extent and the diameter of the pace wire 1 is slightly smaller than the outer diameter of the ring projection 4. Then, the composite contact material 3' obtained by cutting the base wire material 1 and the contact wire material 2 at the joint O is press-molded, and an accurate ring profile with 9 dimensions is formed on the lower surface of the base material 1'. This is because a button-type composite contact 5 having a comb 1 and 4 can be obtained.

Next, in order to clarify the effects of the method for manufacturing a button-type composite contact of the present invention, different embodiments and conventional examples will be described.

〔Example〕

As shown in FIG. The base wire 1' and the 4 wire rod 2 having a diameter of 1.45 y and made of Ag-Cu2!f Chi Cd 2% by weight-Ni 0.5 weight t9b are joined, and then the joined base wire 1' and 1.15s each for contact wire 2
+a, cut to a length of 1.2u to make a cylindrical composite contact material 3' with a total length of λ35, and connect the composite contact material 31 with the corresponding edge.
Press-form the base material 1/a as shown in Figure d.
It has a ring projection 4 with an outer diameter of 1.50 and a chevron-shaped cross section with a width of 0.2 m and a height of 0.2 y on the lower surface of the ring.The thickness is 0.5 am, the diameter is 3.0 W, and the thickness of the M1 point material 2a. A button-shaped composite contact 5 with a radius of curvature of 0.3 wg and a top surface of 30 m was obtained.

[Conventional example]

As shown in FIG.
Diameter 1.45 M consisting of d2wt%-Niα5wt%
Next, the joined base wire l and contact wire 2 are cut into lengths of 1.15 mm and 12 m, respectively, to produce a cylindrical composite contact material 3 with a total length of 235 mm. Then, this composite contact material 3 was heated in a non-oxidizing atmosphere for 30 minutes.
Heat-treated at 0°C for 120 minutes, and then press-formed as shown in Figure cK to form the bottom surface of the base material 1a at @0.2 stage and height 0.
．． It has a ring profile with a chevron-shaped cross section and an outer diameter of 15 m, and has a thickness of α5w1. A button-shaped composite contact 5 having a diameter of 3.0 m, a contact material of 2 m, a thickness of 0.3 cm, and a radius of curvature of the upper surface of 30 m was obtained.

However, when quality was inspected for 6,100 button-type composite contacts of the example and conventional example obtained in this way, it was found that the ring projections were defective, with irregular shapes, insufficient height, and irregularities. In the conventional button-type composite contact, there were 32, but in the button-type composite contact of the embodiment, there were none. This is because the base wire 1', which is the material of the button-type composite contact of the embodiment, is drawn before being joined to the contact wire 2, so the base wire is the material of the button-shaped composite contact O material of the conventional example, which is not drawn. Compared to lK, the hardness is high as shown in the graph of Fig. 3, and this is because the hardness of the surface layer is especially high, and the diameter of the base wire 1' is slightly smaller than the diameter of the ring projection 4. .

According to the method of manufacturing a button-type composite contact according to the present invention as described in detail above, there is an excellent effect that a button-type composite contact having an accurate ring projection shape and nine dimensions can be easily obtained.

[Brief explanation of the drawing]

1A to 1C are diagrams showing the steps of a conventional method for manufacturing a button-type single-joint contact; FIGS. 2A-D are diagrams showing the steps of a method of manufacturing a button-type composite contact according to the present invention; It is a graph which shows the hardness measurement result of the cross section of the base wire used in the manufacturing method of the Example of this invention and a conventional example. l...Base wire material, 1'...--Drawn base wire material 1/a...Base material, 2
...Contact wire, 2m...Contact material, 3/
...;・Composite contact material, 4...Ring projection, 5...Button type compound contact. Applicant Tanaka Kikinzoku Kogyo Co., Ltd.

Claims (1)

[Claims] The pace edge material is drawn out, and then this pace wire and I
A cylindrical composite contact material is made by cutting the joined pace wire material and contact wire material to a required length, and then press-forming this composite contact material to form a base material. A method for manufacturing a button-type composite contact, comprising making a button-type composite contact having a ring projection on the lower surface.