Method and device for surface inspection of strips

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 ...

Images