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Rewinding steel band broken belt protection control method

A technology of protection control and steel belt, which is applied in the direction of electrical program control, program control in sequence/logic controller, etc.

Inactive Publication Date: 2009-11-18
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to use the indirect tension control system to judge whether there is a broken belt and make corresponding failures has not been reported yet.

Method used

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  • Rewinding steel band broken belt protection control method
  • Rewinding steel band broken belt protection control method
  • Rewinding steel band broken belt protection control method

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Experimental program
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Effect test

Embodiment Construction

[0055] The present invention will be further described below in conjunction with accompanying drawing.

[0056] Such as figure 1 As shown, the maximum working speed of a unit involved in this specific embodiment is 400m / min, and the limit of the actual maximum working speed of the unit can be set by the senior administrator according to the needs of balanced production. Speed ​​up and down time of the unit: 20s (from V=0m / min to V=400m / min); rapid shutdown time of the unit: 10s; accident shutdown time of the unit: <6s; in order to ensure stable acceleration and deceleration of the unit, acceleration / The deceleration curve is an S-shaped curve. Process requirements of the unit: When the unit is linked, the output of the uncoiler should be kept between 8KN and 12KN, and the output of the coiler should be kept between 8KN and 16KN. The hardware equipment includes PLC module S7-400, and the frequency converter selects Siemens 6SE70 frequency converter.

[0057] Such as figur...

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PUM

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Abstract

The invention relates to a control method which can make true judgment and adopt protective measures timely, when broken belt occurs in a cold-rolled steel strip rewinding production line of unstressing inspection equipment, the theoretical tension of an uncoiler is extrapolated by measuring and calculating each physical quantity relative to the uncoiler tension, then comparing the theoretical tension of the uncoiler with the actual setting tension , if the theoretical tension is less than the actual setting tension threshold value, the steel band is considered to break; then automatic protection measures and malfunction alarm are adopted in time. When machine sets are in high-speed operation, fast stop protection can be realized by the broken belt protection control; when machine sets are in low-speed operation, normal stop protection can be realized by the broken belt protection control. The invention has the advantages of accurate control, easy realization, and simple and reliable system; broken belt condition can be found timely and accurately and moreover automatic stop protection can be realized, thus effectively reducing the band steel loss and the equipment damage to a minimum.

Description

technical field [0001] The invention relates to a control method for correctly judging and taking protective measures in time when strip breakage occurs in a cold-rolled strip steel recoiling production line applied to tension-free detection equipment. Background technique [0002] The cold-rolled strip recoil production line is an important production line in the cold-rolled strip production. It mainly performs continuous operations of recoiling, splitting and trimming of the cold-rolled strip. The production line is mainly composed of uncoiler, disc shear, coiler, pinch roller, edge alignment device, coil loading and unloading trolley and other equipment. The normal coiling production of the recoiling production line adopts linkage operation, and the motor of the uncoiler and the motor of the coiler work together to generate the tension of the steel strip. Excessive steel strip tension will cause tensile deformation of the strip, and too small tension will cause uneven wi...

Claims

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Application Information

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IPC IPC(8): B21C47/26G05B19/04
Inventor 黄波熊盛涛陈志鹏
Owner WUHAN IRON & STEEL (GROUP) CORP