Spark plug thread detection device and method

Abstract

A spark plug thread detection device and method belong to the technical field of spark plug detection. The spark plug thread detection device includes a workbench which is used for fixing a spark plugand exposing the installation thread of the spark plug, a first detection part which includes first clamping parts having threaded parts matching the installation thread, and a detection component which is used for detecting the displacement of the first clamping parts from a preset position to a detection position and judging whether the effective diameter of the spark plug is qualified or not.The method includes the following steps: a spark plug is fixed on the workbench, and the installation thread of the spark plug is exposed; the first clamping parts having threaded parts matching the installation thread are moved from a preset position to a detection position to engage with the installation thread; and the detection component detects the displacement of the first clamping parts andjudges whether the effective diameter of the spark plug is qualified or not. The steps of thread detection are simple, and the efficiency of detection is high. The threaded parts are rotationally arranged and can be used to correct the tiny scratch of the teeth of the installation thread, which is beneficial to ensuring the safe and high-quality production of spark plugs.

Description

technical field [0001] The invention relates to the technical field of spark plug detection, in particular to a spark plug thread detection device and method. Background technique [0002] The engine is the heart of the locomotive, and the pacing part of the entire heart is the spark plug of the locomotive, which is the premise and basis for ensuring the efficiency and quality of the engine. One of the important structures of the spark plug is its installation thread, which is installed on the top of the combustion chamber of the internal combustion engine to seal the cylinder spark plug hole to maintain the pressure in the cylinder. However, the working pressure in the cylinder combustion chamber is about 45 times the atmospheric pressure, and the spark plug needs to Often in the high-temperature combustion chamber, at the same time it must maintain extremely high airtightness, so the installation thread of the spark plug is particularly important. [0003] The matching ac...

AI Technical Summary

Problems solved by technology

[0004] At present, the more advanced thread measurement method in the world is the thread indicator measurement method. Although this method is very accurate for the detection of various thread parameters, the steps are cumbersome and the efficiency is low, which cannot meet the requirements of mass production testing in factories.

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