Method of measuring dimension of vent valve hole

Abstract

The invention relates to a method of measuring the dimension of a vent valve hole. The method includes the steps: S1, imaging a vent valve hole; S2, carrying out grey value analysis on the imaged image, and obtaining the contour of the vent valve hole; and S3, calculating the dimension of the vent valve hole according to pixel point coordinates corresponding to points on the contour of the vent valve hole. The method is capable of measuring the dimension of various holes including irregular holes, is especially suitable for measuring the dimension of an irregular hole such as a vent valve hole, provides the measurement precision that can reach 0.02mm, effectively solves the technical difficulty in the vent valve field that valve holes are difficult to detect, and plays a remarkably important role in improving the overall quality of vent valve products as well as the competitiveness of enterprises. Moreover, the method is convenient to operate, and is high in automation, high in measuring efficiency and high in measurement precision.

Description

technical field [0001] The invention relates to the technical field of gas reversing devices, in particular to a method for measuring the hole size of a gas exchange valve. Background technique [0002] Gas exchange valves, i.e. intake valves and / or exhaust valves for opening or closing the gas passages of internal combustion engines, are under high mechanical and thermal loads and place high demands on the structural design accuracy of the gas exchange valves, especially The size of the ventilation valve hole, however, the ventilation valve hole is usually a special-shaped hole, and conventional detection devices and detection methods are difficult to detect accurately, with poor measurement accuracy and low measurement efficiency. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a convenient and high-precision measuring method for the hole size of the ventilation valve. [0004] In order to solve the problems o...

AI Technical Summary

Problems solved by technology

[0002] Gas exchange valves, i.e. intake valves and / or exhaust valves for opening or closing the gas passages of internal combustion engines, are under high mechanical and thermal loads and place high demands on the structural design accuracy of the gas exchange valves, especially The size of the ventilation valve hole. However, the ventilation valve hole is usually a special-shaped hole. It is difficult to detect accurately with conventional detection devices and detection methods. The measurement accuracy is poor and the measurement efficiency is low.