Digital determinator for depth of surface scratch defect of steel plate

Abstract

The present invention provides a digital measuring apparatus that is used for measuring the depth of the scuffing defect on the surface of a steel plate, and comprises a defect depth signal collecting part and a data processing output part that is connected with the defect depth signal collecting part, and the defect depth signal collecting part adopts a millimicron probe sensor; the millimicron probe sensor comprises a sensor shell; a linear differential coil is arranged inside the sensor shell, and the linear differential coil is connected with the data processing output part; a differential iron core can be arranged at the center of a linear differential coil skeleton in sliding way; the lower end of the differential iron core is connected with a guide rod of the differential iron core; the lower end of the guide rod is connected with a probing-rod holding sliding supporting seat; the millimicron probe is arranged at the lower end of a probe fixed probing rod; the probe fixed probing rod is fixed on the probing-rod holding sliding supporting seat through a probing-rod automatic position tightening device; the lower part of the probe fixed probing rod is arranged at a central hole at the lower end of the sensor shell, and can slide inside the central hole.

Description

technical field [0001] The invention relates to a digital measuring instrument for the depth of scratches and defects on the surface of steel plates, which belongs to the technical field of iron and steel metallurgy and rolled steel product detection. Background technique [0002] For the steel plate products produced by the rolling mill, the surface quality of the steel plate products must be inspected in time during the production process or before the end of the production, and the product defects should be classified and graded. Defects on the surface of strip steel products produced continuously are especially common. However, there are existing technical means that can only perform qualitative detection of scratch defects, that is, to judge the shape of scratches by visual inspection and hand touch, but it has not been possible to obtain accurate detection results for the depth of the defect. [0003] When this method is used to classify the quality of products with sc...

AI Technical Summary

Problems solved by technology

However, there are existing technical means that can only perform qualitative detection of scratch defects, that is, to judge the shape of scratches by visual inspection and hand touch, but it has not been possible to obtain accurate detection results for the depth of the defect.

[0003] When this method is used to classify the quality of products with scratches, it is often impossible to obtain accurate data on the depth of scratches, which leads to deviations in the judgment.

If the scratches are deep and the judgment is shallow, user quality complaints will occur; if the scratches are shallow and the judgment is deep, the originally qualified products will be downgraded or even scrapped, resulting in economic losses

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