JPS58100986A - Electrode chip - Google Patents

Abstract

PURPOSE:To provide an electrode chip which is improved of workability, conductivity, high temp. strength and seizure resistance by applying copper plating on powdery or fibrous carbon and sintering the composite material thereof. CONSTITUTION:A composite material produced by plating copper 2 on carbon 1 of powdery, fibrous or other suitable forms is sintered to a shape of a desired chip size, whereby an electrode chip is formed. The plated copper 2 is diffused over the entire part of the chip by the high temp. heating in this sintering stage, whereby the copper and chip are made into one body. Then, the conductivity of the chip is assured and the seizure of the chip to objects to be welded is prevented by the carbon 1 diffused and contained over the entire part of the chip. If copper particles 3 ar further mixed with the composite material and are molded by sintering, conductivity is improved. Further, if powder of metals such as nickel, iron, aluminum, zinc and tin and alloys for electrode materials are contained in the composite material, the strength and high temp. strength are further improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrode tip, and particularly to an electrode tip for resistance welding and a tip for a soldering iron.

As is well known, for example, the electrode tip of a spot welding machine is used to apply electricity while pressing the object to be welded, and weld by the resistance heat. Therefore, the characteristics required of the electrode tip are conductivity. The main characteristics required are high strength, high high temperature strength, and no seizure of the workpiece.

However, in conventional electrode tips, copper alloys, especially Gr-CB alloys, are often used, making it difficult to process them into the desired chip shape and requiring hardening and hardening.
Heat treatment such as tempering is required, while during welding,
This tends to cause damage to the objects to be welded, and also leads to deterioration of properties (particularly, deterioration of strength) due to temperature rise during use.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a novel electrode tip with excellent electrical conductivity, high-temperature strength, and seizure resistance.

The purpose of the present invention is to form an electrode tip by sintering at least powdered or fibrous carbon plated with steel, and embodiments of the present invention will be explained below.

As shown in FIG. 1, the electrode chip according to the embodiment of the present invention is made by sintering a composite material in which carbon 1 in powdered, fibrous, or other suitable form is plated with copper 2 into a desired chip size shape. molded. As shown in Figure 2, the compositional structure of the chip after sintering is such that plated copper 2 is diffused throughout the chip and becomes integrally heated due to the high temperature heating during sintering, thereby making the chip conductive. On the other hand, the carbon 1 dispersed and included throughout the tip prevents the tip from sticking to the workpiece to be welded.

Here, carbon 1 and feeder 2 are worth $5 and 5, respectively.
3+1.

Although it is possible to mix them together in a body and form them by sintering, for example, it is possible that carbon and carbon dioxide will be concentrated in the special parts of the chip, which will deteriorate the anti-glare properties and conductivity. The steel should be plated on the carbon beforehand so that they are evenly wetted with each other.

A chip according to another embodiment of the present invention, as shown in FIG. On the other hand, in order to meet the demand for a more highly conductive chip, a composite material mixed with copper particles is sintered to form a chip with the desired size. Together with the carbon-plated copper 2, it is diffused throughout the chip by high-temperature heating at the time of seeding and is ignited.
Chip.

The conductivity is improved by increasing the copper content.

In a chip according to still another embodiment of the present invention, as shown in FIG. ,iron,
A powder material 4 of pure metal such as aluminum, zinc, anchor, etc. or an alloy such as Or-Cu alloy, which is currently used as an electrode material, is further included, and the chip is sintered and formed in the same manner as described above. In particular, it can further improve the strength and high temperature strength of the chip.

Here, for example, 1 of the pure gold balance is used as the powder material 4.
When nickel particles are added to a composite material and sintered, as shown in Fig.
(and the copper particles 3), an alloy 5 such as a Ni--Cu alloy (cupronickel) is generated around the nickel particles, thereby further improving the chip strength.

To roughly summarize the problems, carbon is dispersed and arranged. 4. It functions as a release material for the contact surface with the welded object, and the copper diffuses and becomes integrated, resulting in conductivity. Furthermore, by having a powder material and/or an alloy by interdiffusion of pure metal and copper, it functions to ensure strength, especially high temperature strength.

Therefore, by appropriately changing these mixing ratios and sintering conditions, it is possible to create an electrode tip with characteristics that suit the application. If an electrode tip that can be seen through with a high flow density is required, the content of copper is increased, and conversely, if high strength is required, the content of nickel particles is increased, for example. Various demands can be met by, for example, increasing the production content of the -Cu alloy.

As described above, according to the present invention, in order to form a "T" jil by sintering a composite material containing a powder material of carbon and copper, or a pure metal or an electrode alloy, It is easy to manufacture, conductive,
It is capable of possessing high-dimensional properties necessary for electrode chips, such as strength (especially high temperature strength) and controllability.
Furthermore, by appropriately selecting the mixing ratio of each component in the composite material, it is possible to form electric chips with crystalline properties depending on the application. It is.

4 [Brief explanation of surface 1] ψ, 1 Figure 1 shows the structure of the sintered A-I composite material used in the embodiment of the present invention. Figure 2 shows the composition shown in Figure 11-1, showing the composition after the sintering process, and a diagram showing the groove end.
A diagram similar to FIG. 1. FIGS. 4 and 5 are the same views as FIGS. 1 and 2, respectively, in still another embodiment of the present invention.

1...Carbon 2...Copper (plated) 6...Copper particles 4...Kkel particles in powder material) 5... Alloy (Ni-Cu alloy) Representative Patent Attorney Fujikan Sato S + 12] 72 Figure 7″4 drawing T5 drawing

Claims (3)

[Claims] (1) An electrode tip characterized in that it is formed by sintering a composite material made of carbon in the form of powder, fiber, or other suitable form, which is plated with at least copper. (2) The electrode chip according to claim (1), wherein the composite material includes copper powder. (3) The composite material further includes a powder material of a pure metal such as nickel, iron, aluminum, zinc, or tin or a well-known alloy for electrode materials.
) or (2).