Device and method for checking defects on lower surface of steel plate on line

Abstract

The invention discloses a device and a method for checking defects on the lower surface of a steel plate on line. Before the steel plate is put into a storehouse, a gap which is about 1.5m long is reserved in an on-line roller way; 3-5 white searchlights are respectively arranged on two sides below the gap; the axis of each light upwards inclines at an angle of 15-25 degrees relative to a horizontal plane, so that light beams emitted by the searchlights are incident into the lower surface of the steel plate at incidence angles of 15-20 degrees; a glass mirror is arranged under the steel plate, so that a checker can observe the condition of the lower surface of the steel plate in a mirror surface. Compared with the prior art, the device and the method have the beneficial effects that no requirement on the on-site light rays exists; the device and the method are particularly suitable for indoor work; during production, the checked steel plate does not need to be turned off line, and production working procedures are reduced; tracking of the on-site production shows that the method can accurately and efficiently check out most obvious defects on the lower surface of the steel plate; the checking speed is high, and the efficiency is high.

Description

technical field [0001] The invention relates to the field of steel plate quality management, in particular to a device and method for online inspection of defects on the lower surface of a steel plate. Background technique [0002] In the process of steel plate production, various defects often appear on the upper and lower surfaces of the steel plate due to various reasons, and some small defects are difficult to be directly and quickly identified by the naked eye, resulting in quality defects of the finished steel plate, which are directly related to Applied to the safety and reliability of some major projects, how to accurately and quickly check out the small defects on the upper and lower surfaces of the steel plate has become an important part of the quality inspection of the steel plate surface. Contents of the invention [0003] The object of the present invention is to provide a device and method for online inspection of defects on the lower surface of the steel pl...

AI Technical Summary

Problems solved by technology

[0002] In the process of steel plate production, various defects often appear on the upper and lower surfaces of the steel plate due to various reasons, and some small defects are difficult to be directly and quickly identified by the naked eye, resulting in quality defects of the finished steel plate, directly related to Applied to the safety and reliability of some major projects, how to accurately and quickly check out the small defects on the upper and lower surfaces of the steel plate has become an important part of the quality inspection of the steel plate surface

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