Method for using metal strap shape sensing roller

Abstract

To prevent abnormal detection caused by intrusion of foreign matters into a gap of a sensor, to reduce breakage of a strip, and to prolong the roll change frequency, with respect to a shape detection roll of a cold rolling mill to perform warm rolling.

Description

technical field [0001] The invention relates to the use of shape detection rolls in a processing line for metal strip. Background technique [0002] As disclosed in the conventional Japanese Patent Application Laid-Open No. 54-68283, in a metal strip processing line, a shape detection roll equipped with a load detection sensor in the width direction is brought into contact with the metal strip to measure the width of the metal strip. direction of tension distribution. In particular, the shape of the metal strip is calculated based on this in the cold rolling mill, and controlled to a desired shape. [0003] This shape detection roll is disclosed in, for example, Japanese Patent Application Laid-Open No. 62-167109 and Japanese Patent Application Laid-Open No. 1-132944. The roll is as shown in FIG. 1 and includes a sensor 4 as shown in FIG. 2 . In addition, a gap 5 of several tens of micrometers is provided between the roll main body 1 and the sensor cover 3 in order to bloc...

AI Technical Summary

Problems solved by technology

[0006] In particular, when the temperature of the metal strip is raised to a high temperature for stainless steel or electrical steel sheets, etc., and cold rolling is carried out, the temperature of the shape detection roll will inevitably rise to a certain extent. At this time, due to the deterioration (polymerization) Or moisture evaporates and sticks, clogging the gap of the sensor, it can be seen that the sensitivity of the sensor deteriorates very quickly

[0007] As a solution to this problem, a method of cooling the shape detection roll is considered, but since the shape detection roll has wiring from the sensor, etc., the method of passing the refrigerant inside the roll complicates the structure and cannot be adopted.

Therefore, as shown in the aforementioned Japanese Patent No. 2971177, the method of spraying water cooling has been considered, but due to the high speed of the processing line in recent years, the sprayed water splashes on the surrounding metering equipment, and if sprayed on Water that has been sufficiently cooled will reach the contact surface between the shape detection roll and the metal strip, and the shape detection roll will slip, making it impossible to detect accurate shapes.

As a result, the plate breaks

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