CN103252352B

CN103252352B - Rolling mill fault sky establishes milling method

Info

Publication number: CN103252352B
Application number: CN201310187496.3A
Authority: CN
Inventors: 张世厚; 闫丰梅; 闫峥嵘
Original assignee: Shanxi Taigang Stainless Steel Co Ltd
Current assignee: Shanxi Taigang Stainless Steel Co Ltd
Priority date: 2013-05-21
Filing date: 2013-05-21
Publication date: 2015-09-23
Anticipated expiration: 2033-05-21
Also published as: CN103252352A

Abstract

The invention belongs to the control field of hot-continuous-rolling strip steel rolling line, specifically a kind of rolling mill fault sky establishes milling method.Rolling mill fault sky establishes milling method, in multi rack mill milling process, wherein one or milling train breaks down time, to be broken down normally carrying out of milling train by computer simulation, thus make the milling train do not broken down can normally rolling work.Present invention ensures that in the operation of rolling once occur that the position sensor of certain frame press down system, hydraulic fault and driving unit fault can control by Rapid Implementation automatically, solving finishing mill and stopping for a long time, ensure that hot rolling is produced normal.

Description

Rolling mill fault sky establishes milling method

Technical field

The invention belongs to the control field of hot-continuous-rolling strip steel rolling line, specifically a kind of rolling mill fault sky establishes milling method.

Background technology

In hot rolling enterprise, lead in hot finishing process and have multiple stage hot-rolling mill synchronously to carry out hot rolling, the all hot-rolling mill equipment of finishing mill system must normally come into operation under normal circumstances is the primary condition of rolling, comprise press down system, main transmission etc., but in the operation of rolling, sometimes there is the position sensor of certain frame press down system and hydraulic fault and driving unit fault, cause long-time stopping production, bring huge economic loss to hot continuous rolling factory.

Summary of the invention

Technical problem to be solved by this invention is: how fast processing abnormal conditions can realize the automatically-controlled continuous of hot-rolling finishing mill frame in the operation of rolling; mutual confirmation problem when how to solve certain frame fault between program and field apparatus; how to solve the stability between hot-rolling finishing mill frame, greatly reduce the downtime.

The technical solution adopted in the present invention is: rolling mill fault sky establishes milling method, in multi rack mill milling process, wherein one or milling train breaks down time, to be broken down normally carrying out of milling train by computer simulation, thus make the milling train do not broken down can normally rolling work.

As a kind of preferred embodiment: the different parts broken down according to trouble rolling mill, selected the normal operation of these parts of simulation by computer.

As a kind of preferred embodiment: position sensor, hydraulic fault or main transmission fault appear in trouble rolling mill, selected the normal operation of these parts of simulation by computer.

As a kind of preferred embodiment: computer simulation has two kinds of analog forms, be that the own rolling mill fault of drive failures or fault machine selects analog form according to trouble rolling mill.

Milling train sky is established and is divided into INACTIVE mode and OUT OF SERVICE mode two kinds, be exactly for the position sensor of certain frame press down system, hydraulic fault or main transmission fault, by the normal running conditions selecting sky to establish mode simulated failure equipment, to meet the primary condition required for belt steel rolling, guarantee, when this fault, also can realize normal production.If certain rolling mill screwdown device system goes wrong, just have influence on actual intermesh determination and detection, not affecting i.e. milling train to motor and other equipment can normally change trains or buses, and only needs to lift pressure, select INACTIVE mode sky to establish, can not have an impact to strip surface quality; If certain milling train can not be changed trains or buses because of electrical fault or bearing shell problem, OUT OF SERVICE mode sky can only be selected to establish, which can make simulation milling train in program change trains or buses condition, meets rolling requirements.

The invention has the beneficial effects as follows: present invention ensures that in the operation of rolling once occur that the position sensor of certain frame press down system, hydraulic fault and driving unit fault can control by Rapid Implementation automatically, solve finishing mill to stop for a long time, ensure that hot rolling is produced normal.

Detailed description of the invention

Operative employee, according to chassis equipment fault, selects INACTIVE or OUT OF SERVICE function button by man-machine dialog interface.After selecting sky to establish frame, computer controls this frame hydraulic pressing relief valve and obtains electric, delivery valve dead electricity, and servo valve does not have given, and pressure cylinder lifts, relief valve, delivery valve model: 4WE6D6X/EG24N9K4, servo valve model: 4WSE3EE32-4X/1000B8; For electric fault, local/remote gauge tap being put to this locality, is Long-distance Control time normal, selects local, so that sky is established during frame process do not affect normal rolling during fault.Various valve controls to be realized by point-to-point form; Electrical drive control system is realized by PROFIBUS and GDM communication.

Computer completes corresponding judgement process according to selection marker.If select INACTIVE mode, control program is then set to normal condition (being namely set to FFH by hexadecimal 00H), to meet normal rolling condition the basic interlock condition of this frame press down system; If select OUT OF SERVICE mode, control program then the condition of changing trains or buses of this frame main transmission is carried out simulating namely the simulation of fault frame is provided normal Velocity Reference (namely Velocity Reference 0m/s being modeled as normal baseline mill speed), actual speed feeds back (namely actual speed is fed back 0m/s and be modeled as Normal Feedback mill speed) and transmission duty word (namely hexadecimal CDH being become FFH) etc.By aforesaid operations, then trouble rolling mill is regarded as the normal milling train activated that do not come into operation, can meet normal production conditions completely.

Hydraulic pressure personnel also need to contact confirmation back and forth, just can stop oil processing fault.

Technical staff does not need to confirm in a program to force, and decreases down time, solves on controlling because contact confirms the error caused not in place.

Computer establishes selection marker according to frame sky, under send fault frame not activation marker, and complete the setup algorithm of each frame, meet normal production.

If F2 frame press down system position sensor fault, then F2 frame does not possess steel rolling condition, mm finishing mill unit can not steel rolling, in order to can steel rolling be continued under the condition of F2 frame fault, first operative employee selects F2inactive push button function from picture, afterwards, computer completes corresponding judgement process according to selection marker, put pressure fault condition (as H#FFDC) for normally to depress condition (H#FFFF), this frame hydraulic pressing relief valve is obtained electric, delivery valve dead electricity, servo valve is not given, pressure cylinder lifts, meet rolling requirements, simultaneously second computer completes down the setting value sending trouble rolling mill F2 not activation marker and other frames according to selection marker, so far, F2 frame sky mode of establishing can be adopted to carry out producing for mm finishing mill unit until F2 frame is recovered, F2 frame exits sky and establishes mode.

The original parking checking of Shanxi Taigang Stainless Steel Co., Ltd, control program needs to force primary condition, confirm correlated condition, afterwards, whether operative employee needs mould to roll the function of confirmation equipment normal, general needs more than 40 minutes, after selecting this maneuver, only need 5 minutes, decrease steel scrap simultaneously.The creation of value 1448.4 ten thousand yuan after implementing.

After using the technical program, effect is as follows:

Achieve the automatic control of finishing mill, avoiding to greatest extent because confirming less than the scram caused, greatly reducing rolling line steel scrap, decreasing the cancel closedown time.

Ensure that the setting of finishing mill system, action normally, solve when rolling because of the long-time parking that the problems such as certain frame fault cause, and avoid the impact that subsequent production is normally controlled.

Save fault time, decreased rolling line steel scrap, annual about 1,448 ten thousand yuan of the direct economic benefit obtained.

Claims

1. rolling mill fault sky establishes milling method, it is characterized in that: in multi rack mill milling process, wherein there is position sensor in a milling train, when hydraulic fault or main transmission fault, the normal operation of these parts of simulation is selected by computer, computer simulation has two kinds of analog forms, that the own rolling mill fault of drive failures or fault machine selects analog form according to trouble rolling mill, if certain rolling mill screwdown device system goes wrong, just have influence on actual intermesh determination and detection, do not affect i.e. milling train to motor and other equipment can normally change trains or buses, only need to lift pressure cylinder, INACTIVE mode sky is selected to establish, can not have an impact to strip surface quality, if certain milling train can not be changed trains or buses because of electrical fault or bearing shell problem, OUT OF SERVICE mode sky can only be selected to establish, which can make simulation milling train in program change trains or buses condition, meets rolling requirements.