Side electrode ignition end of spark plug and manufacturing method thereof

Abstract

The invention provides a side electrode ignition end of a sparking plug and a manufacturing method thereof. The side electrode ignition end of the sparking plug comprises a side electrode body (1), a side electrode ignition end base block (2) and a side electrode ignition contact (3), wherein one end of the side electrode body (1) is welded to a metal shell (4) of the sparking plug, the other end of the side electrode body (1) is bent to the axial end face of a center electrode (5) of the sparking plug, the side electrode ignition end base block (2) and the side electrode body (1) are both made of nickel base materials, the side electrode ignition contact (3) is made of precious metal materials, the side electrode ignition contact (3) is welded to the side electrode ignition end base block (2), the side electrode ignition end base block (2) is welded to the side electrode body (1), and the side electrode ignition contact (3) exactly corresponds to the axial end face of the center electrode (5).

Description

technical field [0001] The invention relates to the technical field of spark plugs, in particular to a side electrode ignition end of a spark plug and a manufacturing method thereof. Background technique [0002] The function of the spark plug is to introduce tens of thousands of volts of high-voltage electricity into the combustion chamber, and generate electric sparks to ignite the mixture, and cooperate with the ignition system and the fuel supply system to make the engine do work. The quality of the spark plug determines the performance of the engine to a large extent. performance. The center electrode and side electrodes of the spark plug are inserted into the combustion chamber of the internal combustion engine cylinder. Therefore, the most basic requirements for the center electrode and side electrodes of the spark plug are resistance to ablation, electrical corrosion and chemical corrosion, and good thermal conductivity. Generally made of nickel-based alloys. [00...

AI Technical Summary

Problems solved by technology

[0004] As mentioned above, the advantage of using noble metal as the electrode ignition end of the spark plug is obvious, but there are still a series of technical problems in its actual implementation, for example: 1. The side electrodes of the existing noble metal spark plugs are all directly welded with noble metals On the main body, and all are directly welded online, because the base of the side electrode is generally made of nickel alloy material, which is different from the material of the precious metal wire, so there is also the problem of incompatibility during welding, and it is difficult to weld firmly. Therefore, the phenomenon of desoldering is easy to occur, which is a common problem in the prior art; two, welding precious metal wires on the side electrode body will make the processing technology of the spark plug complicated, which is not conducive to industrial production, and welding failure may directly lead to real spark plugs. A spark plug is scrapped, which indirectly increases the manufacturing cost and reduces the production efficiency of the spark plug.

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