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A roller table positioning method to prevent the roller table from slipping

A positioning method and roller table technology, applied in the control system, electrical components, AC motor control and other directions, can solve the problems of uneven roll plane, steel plate sliding, affecting the quality of steel plate, etc.

Active Publication Date: 2021-05-11
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The observation and analysis is that after the steel plate arrives at the designated position and stops, due to its own inertia, coupled with the long-term wear of the roller table, the roller plane is uneven, and the steel plate slides and shakes on the roller table, resulting in the wrong marking position and affecting the quality of the steel plate
The best way to solve this problem is to replace worn rollers or add motor brakes, but since there are as many as 54 rollers in this area, adding brakes and replacing rollers cannot be implemented in a short period of time, which requires the PLC upper Machine control and roller table frequency converter are improved in control accuracy and control mode

Method used

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  • A roller table positioning method to prevent the roller table from slipping
  • A roller table positioning method to prevent the roller table from slipping

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Embodiment Construction

[0012] A roller table positioning method to prevent the roller table from slipping provided in this embodiment involves the IR compensation function of the ABB ACS800 multi-transmission frequency converter, such as figure 1 shown, including

[0013] Inverter IR compensation is 0-speed compensation: when the motor is at 0-speed, the magnetic flux of the motor is adjusted by supplying an output voltage of 5%-10% relative to the rated voltage of the motor, so as to meet the application occasions of 0-speed and high starting torque; After the steel plate reaches the specified position, it stops at 0 speed. In the case of continuous power supply, the frequency converter provides a compensation voltage of 5%-10% relative to the rated voltage for the motor to increase the magnetic flux and excitation current of the motor to ensure 0-speed torque; tracking model optimization: deceleration time is the time it takes for the motor to decelerate from the highest speed to 0 speed. In theor...

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Abstract

The invention discloses a roller table positioning method for preventing the roller table from slipping, and relates to the technical field of steel plate conveying roller table equipment, including frequency converter IR compensation, that is, 0-speed compensation, tracking model optimization, testing and implementation, by increasing the frequency converter 0 speed IR compensation, combined with the adjustment of the acceleration and deceleration time between the upper computer and the inverter, optimizes the tracking model, accurately locates the roller table, prevents the roller table from slipping, solves the problem of misalignment of the steel plate mark, prevents the steel plate from being scratched, and improves the quality of the steel plate. Reduce downtime, improve production efficiency, and thus increase benefits.

Description

technical field [0001] The invention relates to the technical field of steel plate conveying roller table equipment, in particular to a roller table positioning method for preventing the roller table from slipping. Background technique [0002] At present, most steel mill material transfer rollers are controlled by frequency converter. In the field of medium and thick plates, due to objective reasons such as heavy and large plates, it is difficult to control the roller table during the process of conveying steel plates. In the marking process after the cutting is completed, the wide and heavy plate factory often has the wrong marking position. The observation and analysis is that after the steel plate arrives at the designated position and stops, due to its own inertia, coupled with the long-term wear of the roller table, the roller plane is uneven, and the steel plate slides and shakes on the roller table, resulting in the wrong marking position and affecting the quality o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/04
CPCH02P27/04
Inventor 潘翔
Owner NANJING IRON & STEEL CO LTD
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