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Method and device for surface inspection of strips

A technology for surface inspection and belt molding, which is used in measuring devices, length measuring devices, image data processing, etc., can solve the problems of high cost and many metal belt scraps, and achieve the effect of shortening inspection time and good visual environment.

Active Publication Date: 2015-08-19
SMS DEMAG AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting scrap of rolled metal strip with defective surfaces is very high and costly

Method used

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  • Method and device for surface inspection of strips

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Effect test

Embodiment Construction

[0033] exist figure 1 shows the device 100 according to the invention coupled directly to a rolling train 200 . Metal strip 210 is fed from coil 240 in strip machine direction B to rolling stand 220 . The strip head of the metal strip 210 is guided through a rolling stand 220 and then adjusted to work rolls 230 , whereby the metal strip can be rolled. Strip heads that have not yet been rolled are separated and disposed of. By separating off the first strip, a new strip is produced for the metal strip 210 , which has been rolled by the work rolls. Immediately after the start of the rolling of the metal strip 210 , the separating device 110 separates the strip profile 120 / strip head from the metal strip 210 with a length that is less than twice the circumference of the work roll 230 . The length is freely chosen below this limit. If the strip 120 required for the surface inspection is separated, the metal strip is fed to a coiler and rolled by work rolls 230 to the desired ...

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Abstract

The invention relates to a method for the surface inspection of strip pieces (120). The invention further relates to a device for carrying out the method. The method according to the invention comprises the following steps: cutting off the strip pieces (120) from a metal strip (210), wherein the strip pieces (120) comprise a length less than twice the circumference of a work roll (230) by means of which the metal strip (210) has previously been rolled; automatically checking the upper and / or lower side of the cut-off strip pieces (120) with the aid of a camera system (150) and an analysis unit (300) in regard to any periodic types of faults that may be present and caused by the work roll; ending the surface inspection process if periodically occurring types of faults are detected, or; feeding the cut-off strip pieces (120) to a strip inspection unit (140) for checking by means of inspection personnel for non-periodic types of faults if no periodic types of faults had previously been detected.

Description

technical field [0001] The invention relates to a method for surface inspection of strips. Background technique [0002] In the prior art, immediately after the rolling process, the rolled product is checked for rolling defects at its upper side for quality control. This quality control takes place in downstream lines or devices. The strip profile is usually separated from the metal strip and transported to a strip inspection unit. The tape inspection in the tape inspection unit is carried out visually by the inspector. Indentations and indentations, which often occur periodically, are mainly detected during the inspection. Periodically occurring defects can indicate defects on the roll surface and indicate that a roll change of the work roll must be carried out. This roll change should take place as quickly as possible, so that work rolls with surface defects do not produce further scrap. In order to be able to detect the periodicity, the strip must be cut to a length ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/892
CPCB21B38/00G01N21/8922G06T7/0004G01N21/892
Inventor H-P·里希特D·阿亨巴赫
Owner SMS DEMAG AG
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