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Sparking plug and press fitting method

A spark plug, press-fitting technology, applied in spark plugs, spark plug manufacturing, electrical components, etc., can solve the problems of limiting the EMC performance of spark plugs, reducing space, and complex process, and achieving the effect of improving EMC performance, increasing space height, and simplifying process

Active Publication Date: 2022-02-18
ZHUZHOU TORCH SPARK PLUG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are problems such as difficult processing of conductors, high cost, and complicated high-temperature press-fitting process
Moreover, the height of the metal connecting rod is relatively large, which needs to occupy a relatively high space in the shaft hole, thereby reducing the space that can be used to install resistive elements or inductive elements, thus limiting the improvement of the EMC performance of the spark plug
If the height of the metal connecting rod is reduced, the molten conductive glass can easily pass through the gap between the metal connecting rod and the shaft hole, spread to the metal connecting rod, and stick to the press-fitting parts during high-temperature press-fitting, resulting in parts difficult to withdraw

Method used

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  • Sparking plug and press fitting method

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Embodiment Construction

[0051] Below by specific embodiment and in conjunction with accompanying drawing, the present invention will be further described:

[0052] Existing spark plug high-temperature press-fitting process such as Figures 1 to 4 As shown: the spark plug is composed of: porcelain part 1, center electrode 3, glass body 4, terminal 7, shell and side electrodes, porcelain part 1 is provided with a stepped shaft hole 2; center electrode 3 is opened from the end of the shaft hole 2 Insert and expose from the other end of the shaft hole 2; then fill the shaft hole 2 with glass powder from the end of the shaft hole 2 with a large opening; On the powder; the glass powder is melted at high temperature and then solidified to form a glass body, and the shaft hole 2 is blocked to achieve sealing. Since the press-fit part 6 is directly pressed on the glass powder, the glass body 4 formed after the glass powder melts and solidifies will stick to the press-fit part 9, making it difficult for the p...

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Abstract

The invention relates to the technical field of sparking plug manufacturing, in particular to a sparking plug high-temperature press fitting method. The method comprises the steps that when a sparking plug is pressed, after a shaft hole is filled with glass powder, the shaft hole is filled with conductive powder with the melting point higher than that of the glass powder. During press fitting, a molten glass body permeates into the gap of the solid conductive powder, is bonded with conductive powder after being cooled, and is solidified to form the composite conductor, and the composite conductor is low in height, can increase the space height for mounting a resistance element or an inductance element, and can improve the EMC performance of the sparking plug. Meanwhile, a press-fitting part is separated from the molten glass body by using the conductive powder which is always kept in a solid state, so that the press-fitting part is prevented from being adhered by the glass body, and the press-fitting part can be conveniently and smoothly withdrawn from the shaft hole. The press-fitting process is simplified, the cost is reduced, and the work efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of spark plug production, in particular to a spark plug and a press-fitting method. Background technique [0002] The spark plug is used to ignite the mixture in the internal combustion engine, usually including: porcelain, center electrode, glass body, terminal, metal shell and side electrode. There is a stepped shaft hole in the ceramic part, and the center electrode, glass powder and connection terminals are assembled in the shaft hole in sequence, and the glass powder is melted and solidified to form a glass body through a high-temperature press-fitting process. The glass body is respectively solidified with the central electrode and the terminal to realize electrical connection; at the same time, the glass body seals the shaft hole to realize sealing. [0003] In order to improve the EMC performance of the spark plug, it is usually achieved by adding a resistance element or an inductance element betwee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T13/02H01T21/02
CPCH01T13/02H01T21/02
Inventor 杨辉睦唐刚强赵文科
Owner ZHUZHOU TORCH SPARK PLUG CO LTD
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