JPS60100312A - Composite electric contact part - 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 a composite electrical contact component used in various breakers, switches, etc.

The manufacturing method of composite electrical contacts used for circuit breakers, high-load switches, etc. includes the soldering method and the screw-type contacts manufactured by Nora Jllia, etc.! [Run'N
1? ! One crimping method is known.

The former method is shown in Fig. 1A, where a low Fl!
Interpose a silver solder material 3 (such as BAg-1) and heat the solder to join the contact material 1 and the metal material 2 as shown in Figure 1. By doing, the compound 1* I
:, <Complete all FXliXl products and take this part 4 as the main metal] (This is to form a composite electrical contact.

In the latter cold crimping method, as shown in FIG.
Next, as shown in the opening of FIG. 2, the contact material 111a and the metal material 2b are cold-pressed to form a screw-shaped composite electrical contact component 4a as shown in FIG.

Since the Shobara r1 of the above J:Una composite electrical contact is AQ, the cost of the contact has increased abnormally due to the recent high price n2, and therefore it has become necessary to make the volume of the contact smaller. Further, welding resistance is particularly important for contacts used in breakers, switches, etc.

However, contacts manufactured by conventional brazing methods using burner or furnace heating have a low H1! It is necessary to use silver solder 4Δ, which is a point, and the heat resistance of the joint is not necessarily sufficient.

In addition, the brazing bonding layer is thick, and the thickness of the bonding layer tends to be non-uniform, resulting in gaps in the brazing material portion as shown in Figure 1 of Figure 1c.

Therefore, when used as a contact, the humidity of the contact increases due to the arc generated when the built-in device is opened/closed, and the brazed part of the contact material and the metal material become misaligned or fall off. In order to ensure sufficient bonding strength of such contact portions, it has been impossible to reduce the thickness of the contact points below a certain value using the conventional brazing method.

In addition, contacts manufactured using the cold pressing method have excellent heat resistance at the joint, but the material for the contacts, which is manufactured using the cold pressing method, is 5J・1W1.
It is necessary to make pressure contact with the second shrine.

Contact materials used for interrupting large currents, such as breakers, do not have sufficient adhesion resistance. They must contain a large amount of oxide as a component, and are made of hard and brittle materials. This results in poor machinability and contact point I.
It is difficult to process and cover the pressure contact surfaces of (and base metal) lA smoothly.

There were drawbacks such as the need to use extra AQ in order to maintain the contact thickness of the Yotsu-C standard S method and manufacture it.

This invention was made to eliminate the above-mentioned drawbacks, and its purpose is to create a composite electrical contact that uses less AQ and has sufficient welding resistance! It is about providing.

Hereinafter, one embodiment of the present invention will be described based on FIG. 3.

As shown in FIG. 3A, the contact point A material 11 which mainly covers AQ is rolled into a thin layer and subjected to internal oxidation treatment after punching with a press. This contact material is AQ-CdO-3n 02
,Ag-Sn02)q03 and ~-graphite are used, and AaCclO5T102 is Cc
Io 10-25%, 5n02 0.5-5%, and 8g 5T102-toz03 has Sn 02 of 0.5%.
~10%, Iy=,03 is 0. ! l+-15%, further A
Q -Graph Eye 1- has a graph eye l~ of 0.5 to 10
% range.

The metal material 12 is made of Cu or a Cu alloy, and the contact material 1
It is formed into a screw shape that is not much different in size from 1.

High-temperature steel brazing material used for the copper brazing material layer 13, P is 3 to % in 侃-P.
Containing and Cu-P- ~ 3-8% P, Ag
contains 2 to 20%, &'l (the melting point of the q bonding layer is 76
It is formed on either the contact material 11 or the metal material 12 to a thin and uniform layer thickness of 0.15 mm or less using a material having a temperature of 0° C. or higher.

The gold l114 No. 1112 has a shape in which a small diameter shaft portion 15 is coupled to a large diameter head portion 14 to which the contact material 11 is joined.

Next, the contact material 11 and other metal materials 12 are stacked so as to sandwich the copper solder layer 13, and electrical resistance heating or the like is applied while applying pressure from above and below to join the overlapping surfaces.

The contact material 111 and the metal material J'8+12 are attached to the molten copper alloy J.

The metal material 12 is fixed as shown in FIG. 3, and then the metal material 12 is caulked and fixed to the main metal 16 as shown in FIG. 3C to complete the contact 17.

As described above, according to the present invention, metal materials such as contact materials are bonded through one layer of 16-temperature copper solder with an rrfL of 0.15 mm or less, and the metal materials are fixed to the main metal by means such as caulking. [So, if the bonding layer between the contact material and the metal material is thin and uniform, and has excellent heat resistance, the accuracy of the method will improve, and the AQ m will be reduced by 30% or more compared to the conventional method. It has the excellent effect of providing sufficient welding resistance and enables loss down.

In addition, since it is fixed to the main metal by caulking means, it is easy to manufacture and has the effect of making it possible to efficiently manufacture contacts with high precision.

Example (1) Head is 6mmφX1mm, small diameter 11111 part is 3
Aa-17Cd O-2STl 02 of 6mmφX, 0.5mm When the contact materials were pressure-bonded using a special jig by electrical resistance heating, there were almost no pinholes in the bonding layer, and the bond was 0.05 mm.
It was possible to obtain a thin and uniform bonding layer of mm.

(2) Comparison of heat resistance strength of joints The shear strength of the joints heated for 5 minutes in a 900'CN2 atmosphere furnace and cooled in a N2 atmosphere was measured, and compared with conventional contacts, J as shown in Table 1: I got great results. As is clear from these results, it can be seen that the contact produced according to the present invention has sufficient superiority in heat resistance strength.

Table 1 Contact material size 61IImφX 0.5mm X 30
mm R (AC+-17CdO-2ST+ 02) Metal hand size 6mmφX 1,5] nmX 3
mmφX4. ! +mm (electrolytic copper) (3) Contact △ made in contact performance example (1), G nu for comparison
nφX O, 5mmX 3mmφX 4, 5mm electrical steel and 6mmφ×1 mmX 30mm R Ag
-17Cd O-2Sn 02 IK Jiij,”
10Ag-15,5Cu-16,5Zn-18
Ccl two burner contacts 13 and 6
mmφx 1mmX 3mmφX 4.5mm 6m
mφ×0.5mm×30, mmR Ag-17CdO
-Contact C with burner brazing at point 1a of 2Sn 02,
It was incorporated into a 30△F wiring j-disconnect switch, and the contact f1 ability was evaluated at i''1' under the test conditions shown in Table 2, and the results shown in Table 3 were obtained.

The results show that the contacts of the present invention exhibited superior performance compared to comparative materials without problems such as falling off or welding of the contacts.

Table 2 Performance evaluation conditions Table 3 Test results 5 N catfish

[Brief explanation of the drawing]

Figure 1 is a combination using the conventional method. FIG. 2 is a process diagram showing the production order of cold pressing method 1, and FIG. 3 is a process diagram showing the production order [j-] of the present invention. 11...Contact monthly interest rate 12...Metal 4-O diagonal 13...
Copper brazing material layer 14...Large diameter 0 [1 part 15...Small diameter shaft part 16...] One piece metal 17...Composite electric contact Qur i'r Applicant Sumitomo Electric Industry Co., Ltd. teenager
Attorney Patent Attorney Kazu l-1J1η (Figure 2 (A) Figure 3 (A) Goyoyoyojiy-N (r7) (/l 16

Claims (1)

[Claims] (Composite made by bonding a contact material containing 11A9 as a main component and a metal material such as carbon negative alloy through a copper brazing material layer with a melting point of 700°C or higher and a thickness of 0.15mm or less. and this composite is fixed to the main metal by means such as caulking. (2) Contact material is 0010-25%, 51020.5
The composite electrical contact component according to claim 1, which is Ag CdOST+02 consisting of ~5% and the balance AQ. (3) Contact 14 Fil is Sn 020.5-10%,
It-(hO, Ag consisting of 5-15%, balance A9
-Sn 03-I~03, the composite electrical contact component according to claim 1. (4) The composite electrical contact component according to claim 1, wherein the contact material is A9-graphite consisting of 1 to 0.5 to 10% of graphite and the remainder of -. (5) The composite electrical contact 8Ill'i according to the first aspect of the claim, wherein the copper solder contains 3 to 8% P, and the bolted joint layer has a melting point of 100° C. or higher. ,. (6) The copper alloy contains 3 to 8% P and 2 to 2094% A9, and the melting point of the solder bonding layer is 700°C or higher (σ) to -P
−Ag as described in claim 1 σ) Composite? U air contact parts.