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Defect detection device and production system

A defect inspection and defect technology, which is applied in the direction of measuring devices, spraying devices, liquid spraying devices, etc., can solve problems such as surface peeling off of sprayed coatings, surface defects of sprayed coatings, deterioration of engine oil consumption, etc.

Active Publication Date: 2017-03-01
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when performing post-processing such as honing after spraying, there is a problem that the surface layer of the sprayed layer falls off and microscopic surface defects occur.
In addition, in the case where there are casting holes in the inner surface of the cylinder bore, surface defects also occur and the sprayed layer is not formed normally.
These surface defects function as oil reservoirs, which are beneficial to improve the lubricity with the piston, but on the other hand, if the volume is too large, the oil consumption will deteriorate

Method used

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  • Defect detection device and production system
  • Defect detection device and production system
  • Defect detection device and production system

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Embodiment Construction

[0022] Embodiments are described with reference to the drawings. In the description of the drawings, the same reference numerals are attached to the same parts, and descriptions thereof are omitted.

[0023] [Production system and defect inspection device]

[0024] like figure 1 As shown, the production system according to the embodiment of the present invention includes a defect inspection device 1 and a processing device 4 . The defect inspection device 1 includes a control device 2 and an imaging device 3 .

[0025] A cylinder block of an engine of an automobile or the like will be described as an example of an inspection object of the defect inspection device 1 according to the embodiment of the present invention. like figure 2 As shown, the cylinder block 101 has a plurality of cylinder holes 102 which are cylindrical holes for accommodating pistons.

[0026] As the processing device 4, for example, a plasma spraying device can be used. like image 3 As shown, the...

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Abstract

Provided is a defect detection device (1) by which it is possible to measure the volume of surface defects with high accuracy. The defect detection device (1) is provided with the following: an image pickup device (3) for picking up an image of an object to be detected; a binarization processing unit (11) for calculating first and second sizes of the same defect in the image by performing first and second binarization processing on the image using first and second binarization threshold values that differ from each other; a ratio calculation unit (12) for calculating a first ratio of the second size to the first size; and a depth determination unit (13) for determining the depth of the defect according to the first ratio.

Description

technical field [0001] The invention relates to a defect inspection device and a production system. Background technique [0002] A spraying technique (spray hole) is known in which a metal or ceramic is sprayed on the inner surface of a cylinder bore of a cylinder block installed in an automobile to form a coating (sprayed layer), and a smooth sliding surface is formed by subsequent honing. [0003] The sprayed layer is formed by laminating droplets in multiple layers, so it usually has a porous structure containing many pores and fine defects such as iron oxide. Therefore, when performing post-processing such as honing after spraying, the surface layer of the sprayed layer falls off and there is a problem that minute surface defects are generated. In addition, when casting holes exist on the inner surface of the cylinder bore, surface defects occur and the sprayed layer is not normally formed. These surface defects function as oil reservoirs and contribute to improving t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/30B23Q17/24B24B33/02G01B11/22G01N21/88
CPCG06T7/0004B05B9/01B05B13/06B23Q17/24B24B33/02G01B11/22G01B11/30G01N21/88G01N21/954G01N2021/9548G01N2201/10G01N2201/12G06T7/507G06T7/62G06T2207/30108G06T2207/30148
Inventor 柴山博久盐谷英尔樱井谕杉山精一清水明寺田大辅熨斗良次内海贵人
Owner NISSAN MOTOR CO LTD