Kink detection device and method for coiled plate

Abstract

The present invention relates to a kink detection device and method for detecting defective coil shape, that is, kink, after coiling a coil in a coiler of a hot rolling production line and before transferring the coil to the next process. The kink detection device of one embodiment of the rolled plate includes: a laser generator, which irradiates a straight line laser light passing through the center point of the rolled plate from one surface of the rolled plate including the inner ring portion of the rolled plate; a camera, along the laser The laser movement of the generator is used to obtain an image of the inner circle of the coil from one surface of the coil to the opposite surface of the coil, that is, the other surface, based on the center point of the coil; and the detector is based on the camera The acquired image is used to calculate the distance from the center point of the coil to the coil end of one side of the coil and the distance from the center point of the coil to the coil end of the other side of the coil, thereby detecting The kink amount of the coil.

Description

technical field [0001] The invention relates to a kink detecting device and a method for coiled plates. Background technique [0002] Generally, in the coiling process of the hot rolling line, the front end of the strip passes through a pair of pinch rolls and then bends downward. The curved strip front end is then wound and rotated around the mandrel between the mandrel and helper rolls surrounding the mandrel. Then, after a predetermined time has elapsed, the mandrel expands to the outside of the circumference, tension is generated between the pinch roller and the mandrel, and winding is performed simultaneously. [0003] In the above-mentioned coiler, if the material is extremely thick, due to the shape and improper bending of the front end when the strip enters, a bending phenomenon occurs when the strip enters the mandrel at the beginning, and this phenomenon is defined as kink (Kink). When such kinks occur during the coiling of extremely thick materials, due to the ...

AI Technical Summary

Problems solved by technology

When such kinks occur during the coiling of extremely thick materials, due to the deformation in the inner ring of the coiling portion, there will be a problem that a round shape cannot be produced during the pipe forming operation, and there is a need for manual operations such as welding guns. severe problem with cutting

In addition, if it is not discovered in time, there is also the problem of customers demanding compensation

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