Method for controlling rotating speed of cold rolling flying shear motor

A technology of motor speed and control method, applied in the direction of self-adaptive control, automatic control device, general control system, etc., can solve the problems of heavy workload, damage to the motor and flying shear body equipment, etc., to achieve high speed, good versatility, The effect of high calculation accuracy

Active Publication Date: 2013-07-10
WISDRI ENG & RES INC LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Therefore, if there is no research on the input speed of the motor and the horizontal speed of the shear blade, the matching relationship between the speed of the shear blade and the speed required by the strip steel process will be continuously searched through repeated on-site debugging. cause more damage

Method used

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  • Method for controlling rotating speed of cold rolling flying shear motor
  • Method for controlling rotating speed of cold rolling flying shear motor
  • Method for controlling rotating speed of cold rolling flying shear motor

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Experimental program
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Embodiment Construction

[0026] Technical scheme of the present invention specifically comprises the following steps:

[0027] (1) Solution of blade speed of cold-rolled flying shears

[0028] Schematic diagram of flying shear movement mechanism figure 1 shown. The trajectory of the shear blade can be solved through vector equations and geometric relations. details as follows:

[0029] In the coordinate system mon, apply the relevant knowledge of the vector equation to the quadrilateral OABC:

[0030] (1)

[0031] The equation group (1) is the nonlinear angular displacement equation group of the flying shear mechanism, given the calculation error , using the Newton-Simpson numerical iterative method to solve, we can get and .

[0032] For the U point of the upper scissors:

[0033] (2)

[0034] Through coordinate conversion, the following can be obtained:

[0035] (3)

[0036] Among the above formulas:

[0037] OA ...

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Abstract

The invention relates to a method for controlling rotating speed of a cold rolling flying shear motor. The method for controlling the rotating speed of the cold rolling flying shear motor is characterized in that in the process of flying shear designing, flying shear blade speed is determined through the matching of the flying shear blade speed and speed of shearing of strip steel so as to control the rotating speed of the flying shear motor. A pair of cold rolling flying shears is enabled to reach the matching of motor input rotating speed and the flying shear blade speed at the beginning of designing, damages to the motor and a flying shear device caused by repeatedly debugging in the field are avoided, installing and debugging workload of the pair of flying shears is reduced, and the shearing effect of the pair of flying shears is enabled to meet the requirements of the surface and the fraction surface of the strip steel of cold rolling technology. The method is especially suitable for a pair of start and stop working form crank connecting rod type flying shears in the metallurgy cold rolling technology.

Description

technical field [0001] The invention relates to a method for controlling the rotational speed of a cold-rolling flying shear motor, in particular to a crank-connecting-rod flying shear that is suitable for starting and stopping work in the metallurgical cold rolling process and is based on the speed of the cutting blade and the strip steel in the design process of the flying shear. Matching motor speed control method. technical background [0002] Cold-rolling flying shear is one of the important equipments in the cold-rolling production line. It is arranged behind the pinch rolls to cut off the head and tail of the strip and has the function of segmentation. Its working performance directly affects the rolling line. High production efficiency and product cut quality. With the development of continuous rolling mills, flying shears have been used more and more widely. [0003] In the flying shear system, the upper knife seat rotates around the center point of the crank thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/00B23Q15/08
Inventor 严国平董义君张文凤
Owner WISDRI ENG & RES INC LTD
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