A detection method for the convex structure on the surface of the cylinder liner

Abstract

The invention discloses a method for detecting a protruding structure on a cylinder sleeve surface. The method comprises the steps that S100, a protruding three-dimensional morphology of the cylindersleeve surface is scanned by using a three-dimensional scanner; S200, a three-dimensional modeling software is adopted to compound a protruding three-dimensional model of the cylinder sleeve surface;S300, a three-dimensional analysis software is adopted to select a detection area on the three-dimensional model to obtain protruding numbers, the shortest separation distance between each two protrusions, protruding height and a cross-sectional area of each protrusion in a selected height in the detection area, and the sum of the cross-sectional areas of the protrusions in the selected height andthe proportion of the protrusions in the detection area are calculated. The method for detecting the protruding structure on the cylinder sleeve surface does not need to destroy parts, can not causedamage to the cylinder sleeve, avoids errors caused by protruding deformation, achieves non-destructive detection, and can precisely measure the density, height, space and cross-sectional area of theprotruding structure.

Description

technical field [0001] The invention relates to the technical field of cylinder liner detection, in particular to a detection method for a raised structure on the surface of a cylinder liner. Background technique [0002] The surface of the cylinder liner is usually provided with a raised structure to increase the bonding strength between the cylinder liner and the engine block. At present, there are certain difficulties in the shape detection of the convex structure on the surface of the cylinder liner. Most of the existing detection methods use the destructive detection section, that is, cutting the cylinder liner to obtain the section of the convex structure. However, these detection methods have certain disadvantages. Because the number of protrusions involved in the cutting surface is limited, and the cross-sectional size of the protrusions after cutting is different, the representativeness is poor. The temperature and extrusion generated during the cutting process will...

AI Technical Summary

Problems solved by technology

At present, there are certain difficulties in detecting the shape of the raised structure on the surface of the cylinder liner. Most of the existing detection methods use the destructive detection section, that is, cutting the cylinder liner to obtain the section of the raised structure. However, these detection methods have certain disadvantages

Because the number of protrusions involved in the cutting surface is limited, and the cross-sectional size of the protrusions after cutting is different, the representativeness is poor, and the temperature and extrusion generated during the cutting process will also cause errors in the protrusion size, which will lead to a decrease in the accuracy of the results

[0003] In addition, this method cannot calculate the cross-sectional area of ​​the protrusion at different heights. At present, the width of the protrusion at different heights is measured, and then the cross-sectional area is roughly calculated similar to a cylindrical shape, resulting in large errors

These detection methods also hinder the improvement and improvement of the quality of cylinder liner products to a certain extent.

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