CN201188367Y

CN201188367Y - Composite contact structure

Info

Publication number: CN201188367Y
Application number: CNU2007201870712U
Authority: CN
Inventors: 王益敏; 王申浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-26
Filing date: 2007-12-26
Publication date: 2009-01-28
Anticipated expiration: 2017-12-26

Abstract

The utility model relates to a composite contact structure which comprises a copper basal body, wherein, the upper surface of the plate base of the copper basal body is connected with at least one upper alloy layer by the compounding way, the lower surface of the rod base of the copper basal body is connected with at least lower alloy layer by the compounding way. The composite contact structure has the fabrication technology that: firstly, the upper alloy layer and the plate base of the copper matrix are pressed to a composite contact semi-finished product through a cold holder, secondly, the composite contact semi-finished product and the lower alloy layer are placed in a graphite plate and are put in a high-temperature furnace together, the vacuum diffusion welding procedure principle in the high-temperature furnace is in a vacuum firing furnace or shielding gas atmosphere, under the set temperature and the set time, atoms between the copper matrix and the rod base are mingled and diffused mutually so as to achieve inter combination among metals and form a firm combined amalgamation. Through adopting the copper basal body and argentine or argentine alloy to make by the compounding way, the consumption of rare materials of argentine or argentine alloy, and the like is greatly reduced, the manufacture cost is low; the high temperature atom diffusion welding manner is adopted, the process is perfect, and the bond strength of welding positions is high, the contact resistance is small and stable, and the property and various technical standards reach national and industrial technology standards.

Description

A kind of compound contact structure

Technical field

The utility model relates to the technical field of contact in the electric elements, particularly a kind of rivet type composite electric contact structure, and this product is applicable to the use of appliance switches such as various relays, contactor.

Background technology

The technology of present domestic production rivet type electric contact, the traditional cold headers cold pressing forming process of many employings, its shortcoming is, can only produce monomer or two-layer compound contact, three compound special-purpose rivet drivers have been developed in the recent period abroad, its principle is to lean on the method for cold headers cold moudling and cutting to make the contact moulding, but its equipment price is very expensive, and complicated operation, stock utilization is low, so can't extensively promote, begin from the second half year in 2005, appreciating fast appears in the goods and materials of resource, the silver material that is widely used in the industry manufacturing as rare precious metals again stands in the breach, to the end of the year 2007, the silver price reaches 3600 yuan/kilogram, price during with decontrol of the market in 2003 is compared for 1200 yuan/kilogram, three times have totally been gone up, cause respectively using silver contact entreprise cost pressure huge, under this severe situation, how with the fine silver or the silver alloy contact of former monomer, the transformation of the way is adopted silver or silver alloy for two, the technical barrier that solution is badly in need of in contact manufacturer is not only in middle contact of adopting the NEW TYPE OF COMPOSITE structure of pure copper material, also is simultaneously that the urgent market demand of merchant is used in each contact.

Summary of the invention

Technical problem to be solved in the utility model is the present situation at prior art, and a kind of low cost of manufacture, anti-wear-resistant, and high a kind of compound contact structure and the high efficiency manufacturing process of welding position bond strength are provided.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of compound contact structure, comprise the copper matrix, the compound binding of dish base upper surface of this copper matrix has at least alloy-layer on one deck, and the compound binding of bar base lower surface of above-mentioned copper matrix has at least alloy-layer under one deck;

Its manufacturing process is that the dish base that at first will go up alloy-layer and copper matrix is pressed into the composite contact semi-finished product through cold headers; again composite contact semi-finished product and following alloy-layer are put into graphite plate; and put into high temperature furnace together; vacuum diffusion welding process principle in the high temperature furnace is in vacuum furnace or protective atmosphere; under the melting temperature of 0.6～0.9 mother metal of setting, kept 5 minutes to 30 minutes; make down the diffusion of blending mutually of atom between alloy-layer and the bar base; reach intermetallic and mutually combine, and form the fused layer of firm engagement.

The measure of taking also comprises: above-mentioned last alloy-layer links through the cold-heading pressing with the dish base; Above-mentioned following alloy-layer and the seam crossing atom between the bar base diffuse to form the fused layer of firm engagement mutually through high temperature action.

Above-mentioned last alloy layer thickness size value scope is 0.3 millimeter to 0.7 millimeter.

Above-mentioned last alloy-layer is 5 degree～9 degree with the upsetting pressure demoulding angle value θ of dish base, last alloy-layer is 2.5 millimeters to 8 millimeters with the basic formed T shape dish diameter dimension value φ D of the portion scope of dish, and the gauge value T scope of this T shape dish portion is 0.6 millimeter to 2 millimeters.

Above-mentioned T shape dish portion end face shape can be made as the sphere of projection, also can be made as the plane.The spherical radius size value SR scope of sphere is 4 millimeters to 25 millimeters;

Above-mentioned following alloy-layer and the formed root diameter (RD) size value of bar base φ d scope are 1.2 millimeters to 4 millimeters, and the length dimension value L scope of this root is 1 millimeter to 3 millimeters.

Above-mentioned last alloy-layer is one deck, and correspondingly, described alloy-layer down also is one deck.

Be processed with a large amount of location holes in the above-mentioned graphite plate, according to the contact size size, every stove once can weld 200 simultaneously with upper contact, and production efficiency significantly improves; Above-mentioned following alloy-layer blank adopts wire rod and uses the automatic blanking machine blanking, production efficiency height, no spillage of material; Above-mentioned following alloy-layer has adopted silver-colored bismuth tin lanthanum material, and this material solderability is good, and has good anti-galvano-cautery performance.

Compared with prior art, the compound binding of dish base upper surface of the utility model copper matrix has at least alloy-layer on one deck, and the compound binding of bar base lower surface of copper matrix has at least alloy-layer under one deck.Advantage of the present utility model is to save energy and reduce the cost, environmental protection: adopt copper base and silver or silver alloy produced with combination, not only reduced the exotic material consumption of silver or silver alloy in a large number, low cost of manufacture, the average silver-colored depletion of every contact is few more than 40%, and its technical maturity, welding position bond strength height; The product electrical property is good, and contact resistance is little and stable, belongs to national innovation funds and gives special assistance to project.

Description of drawings

Fig. 1 is vertical schematic appearance of the utility model embodiment;

Fig. 2 is vertical complete section schematic diagram of Fig. 1;

Fig. 3 is the local enlarged diagram at A place among Fig. 2.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Embodiment as shown in Figure 1 to Figure 3, the figure grade explanation: copper matrix 1, coil basic 1a, bar base 1b, sphere 1c, last alloy-layer 2, following alloy-layer 3, fused layer 4.The utility model embodiment, a kind of compound contact structure comprises copper matrix 1, and the compound binding of dish base 1a upper surface of copper matrix 1 has at least alloy-layer 2 on one deck, and the compound binding of bar base 1b lower surface of copper matrix 1 has at least alloy-layer 3 under one deck.

Present embodiment is achieved in that copper matrix 1 T-shaped shape, and the material of last alloy-layer 2 is one deck fine silver, or is the silver alloy of one deck, also can will go up alloy-layer 2 materials and become one deck proof gold according to user's request, or become the golden alloy of one deck; The notion of silver alloy is the alloy that contains ag material, and the notion of golden alloy-layer is the alloy that contains gold copper-base alloy; During the silver alloy-layer of general last alloy-layer 2 employings, this silver alloy can be materials such as silver-colored bismuth tin lanthanum, silver-colored nickel, siller tin oxide, Ag-ZnO, Agcdo in the material selection scope; General manufacture craft, last alloy-layer 2 adopts cold-heading to be pressed into T shape dish base with the basic 1a of dish, and the outer surface of this T shape dish base is shaped on the sphere 1c of projection simultaneously, and the spherical radius size value SR scope of this sphere 1c is 4 millimeters to 25 millimeters; The outer surface of this T shape dish base also can be made the plane according to customer demand, and the diameter dimension value φ D of this T shape dish portion scope is 2.5 millimeters to 8 millimeters, and gauge value T scope is 0.6 millimeter to 2 millimeters.

Following alloy-layer 3 is one deck fine silver, or is the silver alloy of one deck; Also can will descend alloy-layer 3 materials to become one deck proof gold, or become the golden alloy of one deck according to user's request; When general following alloy-layer 3 adopted silver alloy-layer, this silver alloy can be materials such as silver-colored bismuth tin lanthanum, siller tin oxide in the material selection scope; The material of silver bismuth tin lanthanum is a kind of novel contact material, and this material solderability is good, electrical property is good, and has higher mechanical strength.General manufacture craft, seam crossing atom between following alloy-layer 3 and the bar base 1b is through high temperature action counterdiffusion and form the fused layer 4 of firm engagement mutually, be the s layer shown in the figure, compare with traditional cold heading technique, the bond strength of the multiple layer faying face after the Diffusion Welding is better.

Be generally the easy demoulding that makes when cold-heading, generally getting upsetting pressure demoulding angle value θ is 5 degree～9 degree, following alloy-layer 3 is 1.2 millimeters to 4 millimeters with the formed root diameter (RD) size value of bar base 1b φ d scope, and the length dimension value L scope of this root is 1 millimeter to 3 millimeters.

The technology of making a kind of compound contact structure is as follows: the dish base 1a that at first will go up alloy-layer 2 and copper matrix 1 is pressed into the composite contact semi-finished product through cold headers; again composite contact semi-finished product and following alloy-layer 3 are put into graphite plate; and put into high temperature furnace together; vacuum diffusion welding process principle in the high temperature furnace is in vacuum furnace or protective atmosphere; under the melting temperature of 0.6～0.9 mother metal of setting, kept 5 minutes to 30 minutes; make down the diffusion of blending mutually of atom between alloy-layer 3 and the bar base 1b; mutually combine thereby reach intermetallic, and form the fused layer 4 of firm engagement.

Advantage of the present utility model is: adopt copper base and silver or silver alloy produced with combination, reduced the consumption of exotic materials such as silver or silver alloy in a large number, low cost of manufacture; Product is very suitable for having the electrical equipment occasion of conversion contact; Adopt high temperature atom diffusion welding manner, technical maturity, welding position bond strength height; Contact resistance is little and stable, and its performance and every technical indicator reach country and industry technology standard.

Most preferred embodiment of the present utility model is illustrated, and various variations or the remodeling made by those of ordinary skills can not break away from scope of the present utility model.

Claims

1, a kind of compound contact structure, comprise copper matrix (1), it is characterized in that: the compound binding of dish base (1a) upper surface of described copper matrix (1) has at least alloy-layer (2) on one deck, and the compound binding of bar base (1b) lower surface of described copper matrix (1) has at least alloy-layer (3) under one deck.

2, the described a kind of compound contact structure of root a tree name claim 1 is characterized in that: the described alloy-layer (2) of going up links through the cold-heading pressing with dish base (1a); Seam crossing atom between described alloy-layer (3) down and the bar base (1b) diffuses to form the fused layer (4) of firm engagement mutually through high temperature action.

3, the described a kind of compound contact structure of root a tree name claim 2 is characterized in that: described upward alloy-layer (2) is 0.3 millimeter to 0.7 millimeter.

4, the described a kind of compound contact structure of root a tree name claim 3 is characterized in that: the described alloy-layer (2) of going up is 5 degree～9 degree with the upsetting pressure demoulding angle value θ that coils base (1a).

5, the described a kind of compound contact structure of root a tree name claim 4, it is characterized in that: the described alloy-layer (2) of going up is 2.5 millimeters to 8 millimeters with dish base (1a) formed T shape dish diameter dimension value φ D of portion scope, and the gauge value T scope of this T shape dish portion is 0.6 millimeter to 2 millimeters.

6, the described a kind of compound contact structure of root a tree name claim 5 is characterized in that: described T shape dish portion end face is shaped on sphere (1c) shape or the flat shape of projection.

7, the described a kind of compound contact structure of root a tree name claim 6 is characterized in that: the spherical radius size value SR scope of described sphere (1c) is 4 millimeters to 25 millimeters; The circumferential edge of the described T shape dish portion R that also is rounded down.

8, the described a kind of compound contact structure of root a tree name claim 3, it is characterized in that: described alloy-layer (3) down is 1.2 millimeters to 4 millimeters with the formed root diameter (RD) size value of bar base (1b) φ d scope, and the length dimension value L scope of this root is 1 millimeter to 3 millimeters; Described upward alloy-layer (2) is one deck, and correspondingly, described alloy-layer (3) down also is one deck.