CN101419460B

CN101419460B - Hot continuous rolling band steel coil unloading carriage fault extreme simulation control method

Info

Publication number: CN101419460B
Application number: CN2008100797973A
Authority: CN
Inventors: 康炜; 张世厚; 尹晓雷
Original assignee: Shanxi Taigang Stainless Steel Co Ltd
Current assignee: Shanxi Taigang Stainless Steel Co Ltd
Priority date: 2008-11-12
Filing date: 2008-11-12
Publication date: 2010-10-06
Anticipated expiration: 2028-11-12
Also published as: CN101419460A

Abstract

A method for simulating and controlling the fault limitation of a hot continuous rolling band steel coil stripping compact car aims at replacing the limitation having fault with a replacement signal to complete the motion control of the compact car in the situation of the single limitation breakdown and not replacing the limitation of the fault. When a limitation n of the coil stripping compact car goes wrong, a compute generates a pulse n 1 to replace a pulse n 0 generated by the limitation n in normal to complete the control of the compact car; when the compact car passes through the limitation (the limitation n-1) which the fault limitation n is adjacent to, time delay is counted, the pulse n 1 is a pulse width signal generated after time delay for a certain time T<i>; T<i> is time difference between the pulse (n-1) of the limitation n-l and the pulse n o of the limitation when all limitations of the compact car are in normal; n is more than or equal to one and less than or equal to six; the replacing signals of all limitation signals can be worked out by a computer.

Description

The hot continuous rolling band steel coil unloading carriage fault extreme simulation control method

Technical field

The present invention relates to a kind of hot-continuous-rolling strip steel and batch the automatic control technology of unloading volume.

Background technology

Coil stripping car draws off coil of strip from reel, stops when the baler midway, waits for after bundling finishes coil of strip is delivered to tilting gear, and coil stripping car returns under the reel wait and unloads the volume circulation next time then.The control that dolly is advanced positions with the limit.Because limit situation about being broken in process of production happens occasionally, the replacing of the limit in the production run, the time spent is longer, and site work environment is poor when changing, and equipment acts frequently, and has brought bigger potential safety hazard to the operating personnel.Because the probability that the single threshold probability of damage damages simultaneously than adjacent two limit is a lot of greatly.In order to improve the equipment operation rate and to reduce the stop time of causing because of limit fault, some factory of the same type is on the two-orbit that similarly coil stripping car is advanced, and the limit are overlapped in parallel installation two, and are standby each other.

Summary of the invention

The object of the invention is exactly the deficiency that overcomes above-mentioned prior art, providing a kind of damages and does not change under the situation of fault extreme at single threshold, the limit that replaces breaking down with the analogous pole limited signal is finished the mobile control of dolly, realizes that dolly unloads the analog control method of the hot continuous rolling band steel coil unloading carriage fault limit of volume normal function automatically.

When certain limit n of dolly process, can produce a pulse width signal, suppose that this pulse width signal is pulsen0, computing machine receives and is used to control dolly behind this pulse width signal pulse n0 and finishes corresponding control, the different set-points of the proportioning valve that main corresponding control dolly moves here.When limit n of coil stripping car breaks down, during dolly process limit n, can not normally produce pulse width signal pulse n0, this can have influence on the normal control of dolly.In this case for make dolly can with all limit all under the normal condition the same finishing unload the volume function automatically, need make dolly the time through the residing on-the-spot physical location of fault extreme n, calculate function and produce a pulse width signal pulse n1, the pulse width signal pulse n0 that replaces limit n just often can produce finishes the control of dolly.

The basic skills that pulse n1 produces is: dolly begins to calculate time-delay, the time-delay certain time interval T during through the adjacent limit (limit n-1) of fault extreme n _iThe back produces a pulse width signal as pulse 1.

T _iDefinite method be: all limit of dolly just often, the mistiming between the pulse width signal pulse (n-1) of limit n-1 and the pulse width signal pulse n0 of limit n.When the dolly direct of travel not simultaneously, T _iShould be the mistiming between the pulse width signal pulse n0 of the pulse width signal pulse (n+1) of limit n+1 and limit n.

Because during limit n fault, calculate the pulse width signal pulse n1 that function produces, the pulse width signal pulse n0 that can replace limit n just often can produce finishes the normal control of dolly, and because the scope of n is 1≤n≤6, so we can make the substitution signal of all limit signals by computing machine.We finish the signal that produces in the program of dolly control to these alternative fault extreme signals and are called the analogous pole limited signal.When certain limit fault, the volume that unloads automatically of selecting its corresponding simulating limit signal to replace this fault extreme to finish dolly is controlled.

The inventive method can have only a cover limit, and single threshold reaches the standby each other effect of the two cover limit to a certain extent by the simulation limit that comes into operation when damaging, and has brought into play good effect in actual production.Coil stripping car control is batched by using this technology by Taiyuan Iron and Steel Co. hot continuous rolling factory; effect is as follows: reduce to present 30 minutes because of batching downtime of causing after the coil stripping car limit is damaged by 3 hours every month of past; automatically unload volume function devoting rate and improve, created favorable economic benefit.

Description of drawings

Fig. 1 is the coil stripping car zoning plan.

The sequential chart that the simulation limit 1 signal produced when Fig. 2 advanced for dolly.

The sequential chart that the simulation limit 1 signal produced when Fig. 3 retreated for dolly.

The sequential chart that simulation limit n signal produced when Fig. 4 advanced for dolly.

The sequential chart that simulation limit n signal produced when Fig. 5 retreated for dolly.

The sequential chart that the simulation limit 6 signals produced when Fig. 6 advanced for dolly.

The sequential chart that the simulation limit 6 signals produced when Fig. 7 retreated for dolly.

Embodiment

Among Fig. 1, coil stripping car has 6 limit on moving direction, be respectively: the limit 1, dolly are to the reel position limit; The limit 2, the reel deceleration limit; The limit 3, the bundling deceleration limit; The limit 4, the bundling position limit; The limit 5, dolly are to the tilting gear deceleration limit; The limit 6, dolly are to the tilting gear limit.

According to 6 limit the dolly moving area is divided into five zones.Dolly provides different set-points by region and moving direction, corresponding different translational speeds.Thereby can realize the bundling location well and unload automatically smoothly licking journey.Listed the relation of the given percentage of current of the proportioning valve that dolly direct of travel, dolly zone of living in and control dolly move in the table 1.

Suppose that limit n is a fault extreme.The scope of n is: 1≤n≤6.The alternative simulation of fault extreme can divide three kinds of situations to carry out according to limit present position.

During n=1, when dolly is fault extreme to the reel position limit, the signal imitation of fault extreme 1: when dolly advances (advance command is 1), and dolly (zone 1 is masked as 1) in zone 1, when the dolly advance command becomes 1 by 0, will simulate the limit 1 signal and put 0.When dolly retreats (backward command 1), the limit 2 examine back time-delay T0 second, the simulation limit 1 signal is put 1.T0 is by under the normal condition relatively, when dolly retreats, the limit 2 to the limit 1 examine mistiming obtain.

2≤n≤5 o'clock, fault extreme is that dynode is prescribed a time limit, the signal imitation of fault extreme n: when dolly advances (advance command is 1), the limit (n-1) examine the pulse width signal of T1 trigger mode lopar limit n after second, T1 is by comparing under the normal condition, when dolly advances, the limit (n-1) to limit n examine mistiming obtain.When dolly retreats (backward command is 1), when the limit (n+1) examine the pulse width signal of T2 trigger mode lopar limit n after second, T2 is by under the normal condition relatively, when dolly retreats, the limit (n+1) to limit n examine mistiming obtain.

During n=6, when dolly is fault extreme to the tilting gear limit, the signal imitation of fault extreme 6: when dolly advances (advance command is 1), the limit 5 examine back time-delay T3 second, the simulation limit 6 signals are put 1.T3 is by under the normal condition relatively, when dolly advances, the limit 5 to the limit 6 examine mistiming obtain.When (backward command backward command is 1) and zone 5 are masked as 1 when dolly retreats, when the dolly backward command becomes 1 by 0, will simulate the limit 6 signals and put 0.

The relation table in given and direct of travel of table 1. dolly proportioning valve and zone of living in

The present invention batches to unload at Taiyuan Iron and Steel Co. hot continuous rolling 1549 production lines increases the simulation control that the volume limit signal is unloaded in simulation in the volume program; During the practical limit fault, need the maintainer to judge, confirm fault extreme, in program, select then to replace the fault extreme signal with the analogous pole limited signal.

Claims

1. hot continuous rolling band steel coil unloading carriage fault extreme simulation control method, when certain limit n of dolly process, can produce a pulse width signal, suppose that this pulse width signal is pulse n0, computing machine receives and is used to control dolly behind this pulse width signal pulse n0 and finishes corresponding control; It is characterized in that when limit n of coil stripping car breaks down, during dolly process limit n, can not normally produce pulse width signal pulse n0, need computing machine to produce a pulse width signal pulse n1, the pulse width signal pulse n0 that replaces limit n just often can produce finishes the control of dolly; Pulse n1 during through the adjacent limit limit n-1 of fault extreme n, begins to calculate time-delay, the time-delay certain time interval T by dolly _iThe pulse width signal that the back produces; T _iBe all limit of dolly just often, the mistiming between the pulse width signal pulse (n-1) of limit n-1 and the pulse width signal pulse n0 of limit n; The scope of n is 1≤n≤6, makes the substitution signal of all limit signals by computing machine, and when certain limit fault, that selects that its corresponding substitution signal replaces that this fault extreme finishes dolly unloads volume control automatically.

2. a kind of hot continuous rolling band steel coil unloading carriage fault extreme simulation control method as claimed in claim 1 is characterized in that working as the dolly direct of travel not simultaneously, T _iShould be the mistiming between the pulse width signal pulse n0 of the pulse width signal pulse (n+1) of limit n+1 and limit n.