JPH0360880A - Manufacture of clad contact material - Google Patents

Abstract

PURPOSE:To obtain clad contact material having satisfactory jointability by applying ink composed of an Au-base and Ag-base organometallic compound, a solvent and resin to the inside of a groove provided in the longitudinal direction of the upper surface of beltlike base material, drying and burning it and then, inserting the same base contact material as the ink into the groove to perform rolling and joining. CONSTITUTION:Since the ink 5 composed of the Au-base and Ag-base organometallic compound, the solvent and the resin is applied to the inside of the groove 2 of the base material 1, and dried and burnt, an Au-base and Ag-base metal film is formed in the groove 2 and the joining face with contact belt material 3 is protected and at the time of inserting the Au-base an Ag-base contact belt material 3 in the groove to perform rolling and joining, the joining face with the contact belt material 3 of the base material 1 is prevented from being oxidized. The metal film in the groove 2 is diffused mutually on the contact belt material 3 and the base material 1 and is of the same kind as the contact belt material 3, hence fitting is satisfactory and joining strength is made high and stable.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of manufacturing a clad contact material used for connectors and the like.

(Prior Art) Conventionally, clad contact materials used in connectors and the like include clad contacts in which a contact strip 3 is inserted and bonded into a groove 2 provided in the longitudinal direction of the upper surface of a strip-shaped base material I, as shown in FIG. There is material 4.

(Problem to be Solved by the Invention) By the way, in the clad contact material 4, the base material l is Be.
-Cu and SUS have excellent spring properties, but since the contact strip material 3 was joined by hot rolling, oxides of the base material 1 were generated on the joint surface, impairing the joining performance. , the bonding strength of the contact strip material 3 was low and unstable.

In addition, in the production of especially wide and thick clad contact materials with a width of 50 mm or more and a thickness of 3 mm or more, the equipment becomes large and the airtightness of the atmosphere during bonding by hot rolling is poor, resulting in It was difficult to completely hermetically seal the container, and large-scale equipment was required.

Therefore, the present invention aims to provide a method that can produce a stable clad contact material with high bonding strength of the contact strip material, and can also produce a wide and thick clad contact material without requiring large-scale equipment. It is something to do.

(Means for Solving the Problems) In order to solve the above problems, a method for manufacturing a clad contact material of the present invention provides a groove in the longitudinal direction of the upper surface of a strip-shaped base material, and in this groove, Au-based or Ag-based It is characterized by applying an ink consisting of an organometallic compound, a solvent, and a resin, then drying and baking it, and then inserting an Au-based or Ag-based contact band material into the groove and rolling it to join it. It is.

(Function) As described above, in the method for manufacturing a clad contact material of the present invention,
An ink made of an Au-based or Ag-based organometallic compound, a solvent, and a resin is applied to the grooves of the base material, dried, and baked, so that an Au-based or Ag-based metal film is formed within the grooves. Since the joint surface with the contact strip material is protected, Au-based, Ag
When the contact strip material of the system is inserted and rolled and joined, oxidation of the bonding surface between the base material and the contact strip material is prevented. The metal film in the groove is mutually diffused into the contact strip material and the base material, and since the contact strip material and the base material are of the same type, they are compatible with each other. Therefore, the bonding strength is high and stable. Further, even if it diffuses inside the contact strip material and reaches the contact surface, the contact performance will not be deteriorated.

(Example) An example of the method for manufacturing a clad contact material of the present invention will be described with reference to the drawings. As shown in Figure 1a, the width is 30 mm and the thickness is 1. A rectangular groove 2 with a width of 2 mm and a depth of 0.3 mm is provided in the longitudinal direction of the upper surface of a strip-shaped base material 1 made of Be2wt%-Cu of 0 mm. An ink 5 consisting of an Ag-based organometallic compound (water metal), a solvent (terpene alcohol), and a resin (alkyd resin) was applied by spraying, dried, and heated at 400°C for 1 hour.
Baking was performed for 0 minutes to form a 2 μm thick Ag film, and a 2 mm wide and 0 μm thick Ag film was formed in the back wall 2 as shown in FIG. 1C.
．． A contact strip material 3 made of 3 mm of A g -P d 30 wt% is inserted, hot rolled and bonded, and the first
As shown in FIG. d, a clad contact material 4' having a width of 30 mm, a thickness of 00lIllI11, a contact width of 2 mm, and a contact thickness of 0.03 mm was obtained.

On the other hand, as a conventional example, as shown in FIG.
The same contact strip material 3 as in the example was inserted and hot rolled and joined to obtain a clad contact material 4 having the same dimensions as in the example.

The bonding strength of the clad contact materials of the example and conventional example thus obtained was measured by a beer test, and the results shown in the table below were obtained.

(Number of test samples n = 50) As is clear from the table above, the conventional clad contact material was weak and unstable in the beer test with X-5 kg and R = 3 kg, whereas the clad contact material of the example The bonding strength of the contact material was strong and stable enough to cause the contact material to break.

In addition, in the above example, Be2wt%-C was added to the strip base material l.
Although U is used, it is not limited to this, and SUS or other spring materials may also be used.

Furthermore, in the above example, when the ink 5 applied to the bottom of the groove 2 of the base material 1 is dried and fired, since both sides of the groove 2 are exposed, it is slightly oxidized, but this can be removed by acid treatment. good. This slight oxidation and acid treatment does not impair the spring characteristics of the base material 1. In order to prevent oxidation on both sides of the groove 2 of the base l, ink 5 is also applied here, dried, and fired, and both end faces of the contact strip material 3 are also joined to the base material l with sufficient strength. Therefore, a stable clad contact material with high bonding strength of the -layer liquid point material can be obtained.

Further, in the above embodiment, the ink 5 applied to the groove 2 of the base l is
Although Ag-based material was used as the material, Au-Ag20wt%
In the case of the contact strip material, an Au-based material is suitable.

(Effects of the Invention) As can be seen from the above explanation, according to the method for manufacturing a clad contact material of the present invention, it is possible to bond the base material to the contact material without generating oxides on the bonding surface with the contact material, so that the contact material A stable clad contact material with high bonding strength can be obtained.
Another advantage is that even wide and thick clad contact materials can be made without the need for large-scale equipment to prevent oxidation.

[Brief explanation of drawings]

1A to 1D are diagrams showing the steps of an embodiment of the method for manufacturing a cladding contact material of the present invention, and FIG. 2 is a perspective view showing a conventional cladding contact material.

Claims (1)

[Claims] 1. A groove is provided in the longitudinal direction of the upper surface of the band-shaped base material, and ink made of an Au-based or Ag-based organometallic compound, a solvent, and a resin is applied into the groove, and then dried and baked. A method for producing a clad contact material, which comprises inserting an Au-based or Ag-based contact strip material therein and rolling and joining the material.