CN105945071A - On-line roller change device and method for finish rolling unit in endless strip production - Google Patents

Abstract

Translated fromChinese

本发明公开一种ESP无头轧制中精轧机组在线换辊设备及方法，涉及冶金连铸连轧领域，其将传统精轧机组五机架布置改为六机架布置，五架轧机投入使用，一架轧机处于换辊待命状态，当某架轧机需要更换轧辊时，待命轧机投入和换辊轧机退出轧制并完成换辊，两个动态过程同步进行，通过轧机控制系统的动态变规程策略来实现两个规程的稳态切换，确保轧制过程的稳定性以及出口带材厚度保持不变，换辊轧机在换辊完成后成为新的待命轧机。通过配置可移动式工作辊上轨道并采用C形架，实现工作辊及支承辊的在线换辊。本发明能够在不停机和不影响生产的前提下完成精轧机组的在线换辊，解决了薄带ESP无头轧制生产中由于频繁换辊导致的频繁停机，提高了生产效率。

The invention discloses an online roll changing device and method for a finishing mill in ESP endless rolling, and relates to the field of metallurgical continuous casting and rolling. In use, a rolling mill is in the standby state for roll change. When a rolling mill needs to change rolls, the standby rolling mill is put into operation and the roll changing mill exits rolling and the roll change is completed. The two dynamic processes are carried out synchronously. The strategy is used to realize the steady-state switching of the two procedures, to ensure the stability of the rolling process and the thickness of the exit strip remains unchanged, and the roll-changing mill becomes a new stand-by mill after the roll-changing is completed. By configuring the movable upper track of the work roll and adopting the C-shaped frame, the online roll change of the work roll and the back-up roll is realized. The invention can complete the on-line roll change of the finish rolling unit without stopping the machine or affecting the production, solves the frequent stoppage caused by frequent roll changing in the thin strip ESP endless rolling production, and improves the production efficiency.

Description

Translated fromChinese

一种ESP无头轧制中精轧机组在线换辊设备及方法A kind of equipment and method for online roll changing of finishing mill in ESP endless rolling

技术领域technical field

本发明涉及冶金连铸连轧领域，尤其涉及一种无头轧制(ESP)中精轧机组在线换辊设备及方法。The invention relates to the field of metallurgical continuous casting and rolling, in particular to an on-line roll changing device and method for a finish rolling unit in an endless rolling (ESP).

背景技术Background technique

热轧薄带钢可用作成品或冷轧的原料，其需求在世界范围内持续增长，但是传统带钢热轧工艺环境污染严重、能源消耗巨大，不利于节能环保型社会建设。目前国内外的研究热点是开发薄板坯连铸连轧工艺，“以热代冷”生产薄规格板带产品，从而减小能源消耗和环境污染。热轧板带无头轧制技术(EndlessStrip Production，ESP)是目前国内外短流程热轧带钢领域的前沿技术，能够充分利用钢水热能，在高效、紧凑的生产线上生产出能够替代冷轧产品的优质薄规格热轧带钢。但是由于ESP生产线产品主要以薄规格板带材产品为主，轧制过程中精轧机组的轧辊磨损非常严重，换辊周期一般是常规轧制换辊周期的两倍，换辊频繁。由于ESP生产线是连铸连轧，下游的精轧机组换辊期间，上游的连铸便无法继续进行，生产线只能被迫停止，严重影响薄板坯连铸连轧的生产效率。Hot-rolled thin strip steel can be used as finished products or raw materials for cold rolling, and its demand continues to grow worldwide. However, the traditional hot-rolled strip steel process has serious environmental pollution and huge energy consumption, which is not conducive to the construction of an energy-saving and environmentally friendly society. At present, the research hotspot at home and abroad is to develop thin slab continuous casting and rolling process, "replacing heat with cold" to produce thin-gauge slab products, so as to reduce energy consumption and environmental pollution. Endless Strip Production (ESP) is a cutting-edge technology in the field of short-process hot-rolled strip at home and abroad. It can make full use of the heat energy of molten steel and produce products that can replace cold-rolled products on an efficient and compact production line. High-quality thin-gauge hot-rolled strip. However, since the products of the ESP production line are mainly thin-gauge plate and strip products, the roll wear of the finishing unit is very serious during the rolling process, and the roll change cycle is generally twice that of the conventional rolling roll change cycle, and the roll change is frequent. Since the ESP production line is continuous casting and rolling, during the roll change of the downstream finishing mill, the upstream continuous casting cannot continue, and the production line has to be stopped, which seriously affects the production efficiency of thin slab continuous casting and rolling.

发明内容Contents of the invention

针对上述存在问题，本发明的目的在于提供一种无头轧制(ESP)中精轧机组在线换辊设备及方法，能够保证在不停机和不影响正常生产的前提下完成精轧机组的在线换辊。In view of the above existing problems, the object of the present invention is to provide an online roll changing equipment and method for the finishing mill in endless rolling (ESP), which can ensure that the online finishing mill can be completed without stopping the machine and without affecting normal production. Change the roll.

本发明解决其技术问题所采用的技术方案是：The technical solution adopted by the present invention to solve its technical problems is:

一种ESP无头轧制中精轧机组在线换辊设备，包括五架轧机，其特征在于，增设一架轧机，将传统的五机架精轧机组布置改为六机架布置，轧机配备工作辊换辊装置和支撑辊换辊装置；正常轧制生产时，五架轧机投入使用，一架轧机处于换辊待命状态；当某一架轧机需要换辊时，待命轧机投入使用，需换辊轧机退出轧制后在线进行换辊并在换辊过程完成后成为新的待命轧机。An on-line roll changing equipment for finishing rolling mills in ESP endless rolling, including five rolling mills, characterized in that a rolling mill is added, and the traditional five-stand finishing rolling mill arrangement is changed to six-stand arrangement, and the rolling mills are equipped with working Roll changing device and backup roll changing device; during normal rolling production, five rolling mills are put into use, and one rolling mill is in standby state for roll changing; After the rolling mill exits rolling, the roll change is performed online and becomes a new stand-by mill after the roll change process is completed.

进一步地，所述工作辊换辊装置主要包括设置在轧机机架上的工作辊上轨道、下轨道和轨道液压缸，上轨道为可移动式，通过轨道液压缸使上轨道在机架上作上、下移动；轧制生产时，轨道液压缸使上轨道降到最低位置，弯辊液压缸与上工作辊轴承座接触；更换工作辊时，轨道液压缸使上轨道提升至最高位置，弯辊液压缸降到最低位置，上工作辊可沿上轨道抽出。Further, the work roll changing device mainly includes the upper track, the lower track and the track hydraulic cylinder of the work roll arranged on the rolling mill frame. The upper track is movable, and the upper track is moved up and down on the frame through the track hydraulic cylinder. Move; during rolling production, the rail hydraulic cylinder lowers the upper rail to the lowest position, and the bending roll hydraulic cylinder contacts the bearing seat of the upper work roll; when replacing the work roll, the rail hydraulic cylinder raises the upper rail to the highest position, and the bending roll hydraulic cylinder lowers to In the lowest position, the upper work roll can be drawn out along the upper track.

进一步地，所述支承辊换辊装置为一个C形架，所述C形架可使上、下支承辊同时从机架中抽出，并可使上、下支承辊一起装入机架。Further, the support roll changing device is a C-shaped frame, which can simultaneously pull out the upper and lower support rolls from the frame, and allow the upper and lower support rolls to be loaded into the frame together.

一种ESP无头轧制中精轧机组在线换辊方法，其利用ESP无头轧制中精轧机组在线换辊设备对工作辊及支撑辊进行在线不停机更换，具体步骤如下：A method for on-line roll changing of a finishing mill in ESP endless rolling, which utilizes the online roll changing equipment of a finishing mill in ESP endless rolling to perform on-line non-stop replacement of work rolls and back-up rolls, and the specific steps are as follows:

(1)正常轧制生产时，五架轧机投入使用，一架轧机处于换辊待命状态，投入使用的五架轧机通过轨道液压缸使上轨道降到最低位置，弯辊液压缸与上工作辊轴承座接触，进行弯辊调节，投入轧制生产；当某架轧机需要更换轧辊时，通过轧机控制系统的动态变规程策略来实现两个轧制规程的稳态切换使待命轧机投入使用和需换辊轧机退出轧制同步进行，以保持轧制过程的稳定性以及出口带材厚度不变；(1) During normal rolling production, five rolling mills are put into use, and one rolling mill is on standby for roll change. The five rolling mills put into use lower the upper track to the lowest position through the track hydraulic cylinder, and the bending roll hydraulic cylinder and the upper work roll bearing When a certain rolling mill needs to replace the rolls, the steady-state switching of the two rolling schedules is realized through the dynamic schedule change strategy of the rolling mill control system, so that the standby rolling mill is put into use and needs to be replaced. The rolling mill exits and rolls synchronously to maintain the stability of the rolling process and the thickness of the exit strip;

(2)当工作辊换辊时，通过轨道液压缸推动上轨道提升至最高位置，弯辊液压缸降到最低位置，将上、下工作辊沿上、下轨道抽出后，装入新的工作辊，此过程不影响带钢通过，实现在线更换工作辊，更换完工作辊的轧机，通过轨道液压缸将上轨道降到最低位置，弯辊液压缸与上工作辊轴承座接触，成为新的待命轧机；(2) When the work roll is changed, the upper track is lifted to the highest position by the track hydraulic cylinder, and the roll bending hydraulic cylinder is lowered to the lowest position. After the upper and lower work rolls are pulled out along the upper and lower tracks, new work rolls are loaded , this process does not affect the passage of the strip, and realizes the online replacement of work rolls. After replacing the work rolls, the upper track is lowered to the lowest position through the track hydraulic cylinder, and the bending roll hydraulic cylinder is in contact with the upper work roll chock, becoming a new stand-by mill ;

(3)当支承辊换辊时，先将工作辊在线抽出后将下支承辊抽出，然后在下支撑辊上放置C形架后推入需换辊轧机，最后将上支承辊落在C形架上，上、下支承辊同时抽出，类似地，可将新支承辊装入需换辊轧机，完成支承辊的在线换辊，更换完支撑辊的轧机成为新的待命轧机。(3) When the back-up roll is changed, first pull out the working roll online and then pull out the lower back-up roll, then place a C-shaped frame on the lower back-up roll and push it into the rolling mill to be replaced, and finally put the upper back-up roll on the C-shaped frame Upper, upper and lower back-up rolls are drawn out simultaneously, similarly, new back-up rolls can be loaded into the roll-changing mill to complete the on-line roll change of back-up rolls, and the mill that has replaced the back-up rolls becomes a new stand-by mill.

本发明的有益效果是：The beneficial effects of the present invention are:

1、本发明将传统的五机架布置改为六机架布置，五个轧机投入使用，一个轧机处于换辊待命状态，通过轧机控制系统的动态变规程策略实现待命轧机投入使用和需换辊轧机退出轧制同步进行，确保轧制过程的稳定性以及出口带材厚度保持不变，改善ESP薄带轧制的连续性，提高生产效率。1. In the present invention, the traditional five-stand arrangement is changed to six-stand arrangement, five rolling mills are put into use, and one rolling mill is in a standby state for roll change, and the standby rolling mill is put into use and roll change is required through the dynamic program change strategy of the rolling mill control system The rolling mill exits and rolls synchronously to ensure the stability of the rolling process and the thickness of the exit strip remains unchanged, improving the continuity of ESP thin strip rolling and increasing production efficiency.

2、本发明的可移动式工作辊轨道，可实现工作辊的在线换辊。2. The movable work roll track of the present invention can realize online roll change of work rolls.

3、本发明采用C形架，可实现支承辊的在线换辊。3. The present invention adopts the C-shaped frame, which can realize the online roll changing of the backup roll.

附图说明Description of drawings

图1为本发明的六架轧机布置示意图。Fig. 1 is a schematic layout diagram of the six-stand rolling mill of the present invention.

图2为本发明的可移动式工作辊上轨道示意图。Fig. 2 is a schematic diagram of the track on the movable work roll of the present invention.

图3为本发明的支承辊在线换辊用C形架示意图。Fig. 3 is a schematic diagram of a C-frame for on-line roll changing of backup rolls according to the present invention.

图中：1-机架；2-下轨道；3-液压缸组件；4-工作辊上轨道；5-轨道液压缸；6-弯辊液压缸；7-上支承辊；8-C形架；9-带钢；10-下支承辊；F1～F6-六架轧机。In the figure: 1-frame; 2-lower track; 3-hydraulic cylinder assembly; 4-upper track of work roll; 5-track hydraulic cylinder; 6-bending roll hydraulic cylinder; 7-upper backup roll; 9-strip steel; 10-bottom backup roll; F1～F6-six-stand rolling mill.

具体实施方法Specific implementation method

下面结合附图及实施例对本发明做进一步说明：Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

如图1所示，本发明实施例的一种ESP无头轧制中精轧机组在线换辊设备，是将原来的五机架布置改为六机架布置，五个轧机投入使用，一个轧机处于换辊待命状态，需要换辊时，待命轧机投入使用和需换辊轧机退出轧制同步进行，通过轧机自动控制系统完成动态规程变换后，完成换辊的轧机成为新的待命轧机。As shown in Figure 1, a kind of online roll changing equipment of the finishing rolling group in the ESP endless rolling of the embodiment of the present invention is to change the original five-stand arrangement into a six-stand arrangement, five rolling mills are put into use, and one rolling mill In the standby state for roll change, when a roll change is required, the standby rolling mill is put into use and the roll-changing mill is withdrawn from rolling simultaneously. After the dynamic regulation transformation is completed through the rolling mill automatic control system, the rolling mill that has completed the roll change becomes a new standby rolling mill.

如图2所示，各架轧机的机架1上均设有可移动式工作辊上轨道4，上轨道4通过轨道液压缸5使其运动，可实现在线更换工作辊。As shown in Fig. 2, the frame 1 of each rolling mill is equipped with a movable work roll upper track 4, and the upper track 4 is moved by a track hydraulic cylinder 5, which can realize online replacement of work rolls.

如图3所示，为了在线更换支承辊，各架轧机均采用C形架8更换支承辊。As shown in Figure 3, in order to replace the back-up rolls on-line, each stand rolling mill adopts a C-shaped stand 8 to replace the back-up rolls.

本发明实施例的一种ESP无头轧制中精轧机组在线换辊方法，在具体换辊操作时可按如下步骤进行：In the embodiment of the present invention, a method for online roll change of the finishing mill in the ESP endless rolling can be carried out in the following steps during the specific roll change operation:

(1)正常轧制生产时，五架轧机(如F₁～F₅)投入使用，一架轧机(如F₆)处于换辊待命状态，投入使用的五架轧机通过轨道液压缸5使工作辊上轨道4降到最低位置，弯辊液压缸6与上工作辊轴承座接触，进行弯辊调节后，投入轧制生产；当达到换辊周期，某轧机(如F₅)工作辊需要更换时，轧机F₆投入使用和轧机F₅退出轧制过程同步进行，通过轧机控制系统的动态变规程策略来实现，确保轧制过程的稳定性以及出口带材厚度保持不变。等待轧机F₅开口度增大到满足换辊要求后，进行换辊操作。待轧辊更换完毕，轧机F₅处于待命状态，成为新的待命机架。更换其余轧机轧辊，类似上述过程，只是相应的动态变规程策略有所不同。(1) During normal rolling production, five rolling mills (such as F₁ ~ F₅ ) are put into use, and one rolling mill (such as F₆ ) is in a roll-changing standby state. The roll upper rail 4 is lowered to the lowest position, and the roll bending hydraulic cylinder₆ is in contact with the upper work roll chock. After the roll bending is adjusted, it is put into rolling production; , the rolling mill_F6 is put into use and the rolling mill_F5 exits the rolling process simultaneously, which is realized through the dynamic program change strategy of the rolling mill control system to ensure the stability of the rolling process and the exit strip thickness remains unchanged. Wait for the opening of the rolling mill_F5 to increase to meet the requirements of the roll change, and then perform the roll change operation. After the rolls are replaced, the rolling mill F₅ is on standby and becomes a new stand on standby. Replacing the rest of the rolling mill rolls is similar to the above-mentioned process, except that the corresponding dynamic regulation strategy is different.

(2)当工作辊换辊时，通过轨道液压缸5推动工作辊上轨道4提升至最高位置，弯辊液压缸5降到最低位置，通过换辊小车和换辊架将上、下工作辊沿上、下轨道抽出后，装入新的工作辊，此过程不影响带钢9通过，实现在线更换工作辊；更换完工作辊的轧机F₅，通过轨道液压缸5将工作辊上轨道4降到最低位置，弯辊液压缸5与上工作辊轴承座接触，成为新的待命轧机。(2) When the work roll is changed, the upper track 4 of the work roll is lifted to the highest position through the track hydraulic cylinder 5, and the roll bending hydraulic cylinder 5 is lowered to the lowest position, and the upper and lower work rolls are moved along the After the upper and lower rails are pulled out, new work rolls are installed. This process does not affect the passage of the strip steel 9, and the online replacement of work rolls is realized; the rolling mill F₅ that has replaced the work rolls lowers the upper rail 4 of the work rolls to At the lowest position, the roll bending hydraulic cylinder 5 is in contact with the upper work roll chock and becomes a new stand-by rolling mill.

(3)当支承辊换辊时，先将工作辊在线抽出后将下支承辊10抽出，然后在下支撑辊10上放置C形架8后推入需换辊轧机，最后通过支撑辊平衡装置将上支承辊7落在C形架上，上、下支承辊同时抽出，类似地，可将新支承辊装入需换辊轧机，完成支承辊的在线换辊。更换完支撑辊的轧机处于待命状态，成为新的待命轧机。(3) When the back-up roll is changed, first pull out the work roll online and then pull out the lower back-up roll 10, then place the C-shaped frame 8 on the lower back-up roll 10 and push it into the rolling mill to be replaced, and finally use the back-up roll balancing device to Upper back-up roll 7 falls on the C-shaped frame, and upper and lower back-up rolls are extracted out simultaneously, similarly, new back-up roll can be packed into needing the roll-changing mill, completes the on-line roll change of back-up roll. The rolling mill that has replaced the back-up roll is in a standby state and becomes a new standby rolling mill.

Claims (4)

1. the online roll-changing equipment of mm finishing mill unit in ESP endless rolling, including five rolling mills, its feature existsIn, to set up a rolling mill, five traditional frame mm finishing mill unit are arranged, and changing six frames into arranges, milling train is equipped withWorkroll change and support roller changing rig；During normal Rolling Production, five rolling mills come into operation, and oneRolling mill is in roll change armed state；When a certain rolling mill needs roll change, milling train of awaiting orders comes into operation, and needsRoll change milling train carries out roll change online and becomes new milling train of awaiting orders after roll change process completes after exiting rolling.

The online roll-changing equipment of mm finishing mill unit in a kind of ESP endless rolling the most according to claim 1, itsBe characterised by, described workroll change mainly include the working roll being arranged in rolling-mill housing get on the right track,Lower railway and track hydraulic cylinder, get on the right track as packaged type, make to get on the right track in frame by track hydraulic cylinderMove up and down；During Rolling Production, track hydraulic cylinder makes to get on the right track and is preferably minimized position, bowed roller hydraulic cylinderContact with top working roll bearing block；When changing working roll, track hydraulic cylinder makes to get on the right track and is promoted to extreme higher position,Bowed roller hydraulic cylinder is preferably minimized position, and top working roll can be along extraction of getting on the right track.

The online roll-changing equipment of mm finishing mill unit in a kind of ESP endless rolling the most according to claim 1, itsBeing characterised by, described back-up roll extractor is a C-shaped frame, and C-shaped frame can make upper and lower backing roll simultaneouslyExtract out from the frame of milling train, and upper and lower backing roll can be made to load frame together.

4. the online roll-changing method of mm finishing mill unit in an ESP endless rolling, it is characterised in that utilize ESPIn endless rolling, working roll and support roller are carried out not shutting down replacing online by the online roll-changing equipment of mm finishing mill unit, toolBody step is as follows:

(1), during normal Rolling Production, five rolling mills come into operation, and a rolling mill is in roll change armed state,Five rolling mills come into operation make to get on the right track by track hydraulic cylinder and are preferably minimized position, and bowed roller hydraulic cylinder is with upperWorking roll bearing block contacts, and carries out roller regulation, puts into Rolling Production；When certain rolling mill needs to change rollTime, the stable state switching being realized two rolling procedures by the dynamically change code strategy of mill control system makes to treatLife milling train comes into operation and needs roll change milling train to exit rolling synchronization and carries out, with keep the stability of the operation of rolling withAnd outlet thickness of strip is constant；

(2) when work roll changing, got on the right track by track Hydraulic Cylinder and be promoted to extreme higher position, rollerHydraulic cylinder is preferably minimized position, is taken out along upper and lower track by upper and lower working roll by roll change buggy and roll change frameAfter going out, loading new working roll, this process does not affect strip steel and passes through, it is achieved change working roll online, changesThe milling train of complete working roll, will be got on the right track by track hydraulic cylinder and be preferably minimized position, bowed roller hydraulic cylinder and upper workMake roll bearing seat contact, become new milling train of awaiting orders；

(3) when backup roll change, after first working roll being extracted out online by lower support roll extract out, then underSupport to push after placing C-shaped frame on roller and need roll change milling train, finally top backing up roll is fallen in C-shaped frame, upper,Lower support roll is extracted out simultaneously, similarly, can by new backing roll load need roll change milling train, complete backing rollLine roll change, has changed the milling train of awaiting orders that the milling train of support roller becomes new.