WO2019105112A1 - 一种换辊装置及基于其的快速更换工作辊方法 - Google Patents

一种换辊装置及基于其的快速更换工作辊方法 Download PDF

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Publication number
WO2019105112A1
WO2019105112A1 PCT/CN2018/106382 CN2018106382W WO2019105112A1 WO 2019105112 A1 WO2019105112 A1 WO 2019105112A1 CN 2018106382 W CN2018106382 W CN 2018106382W WO 2019105112 A1 WO2019105112 A1 WO 2019105112A1
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Prior art keywords
roll
work
work roll
roller
changing device
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PCT/CN2018/106382
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English (en)
French (fr)
Inventor
杨威
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中冶南方工程技术有限公司
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Priority to US16/767,595 priority Critical patent/US11364525B2/en
Publication of WO2019105112A1 publication Critical patent/WO2019105112A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
    • B21B31/103—Manipulators or carriages therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/147—Cluster mills, e.g. Sendzimir mills, Rohn mills, i.e. each work roll being supported by two rolls only arranged symmetrically with respect to the plane passing through the working rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing

Definitions

  • the invention belongs to the technical field of multi-roll rolling mills, and in particular relates to a quick roll changing structure and method for a multi-roll cold-rolled strip mill.
  • the rolling mills in which the number of rolls in a single apparatus exceeds 6 to 8 rolls are generally referred to as a multi-roll mill.
  • a multi-roll mill for example, a 36-roll mill, a 20-roll mill, an 18-roll mill, a 12-roll mill, a 10-roll mill, and the like.
  • the multi-roll mill is widely used for special requirements such as thin thickness and high strength, and has the advantages of good thickness precision and excellent shape, and is widely used in the industry.
  • the general work roll has a small design size and no bearing housing, which is supported by other roller bodies in the frame.
  • the work roll is replaced, at least one end of the work roll body is generally clamped by a clamping mechanism provided on the roll changing device, the old roll is taken out from the frame, and a new roll is loaded.
  • the roll changing device clamping mechanism does not have a roller and enters the rolling mill frame
  • the roll changing device clamping mechanism clamps the new work roll and enters the rolling mill frame
  • This roll changing process is similar to the general four-roller and six-roller roll changing method.
  • the basic schematic diagram of the structure and process of the roll changing device is generally shown in Figure 1-4. State diagram, change the status of the work roll (replacement roller outside the rack), change the status map of the work roll (replace the roll in the rack). Both are the “no-load entry-extracting old roller-push-in new roller-no-load exit” process, and the roll changer needs to be in and out of the mill stand twice, which takes a long time.
  • the technical problem to be solved by the invention is to solve the defect that the roll change efficiency of the existing multi-roll mill is not high, and to provide a roll changing device, which has a simple structure and convenient operation, and can conveniently hold the work roll by using the device; and simultaneously provides a multi-roller
  • the rapid change of the work roll method of the rolling mill can replace the work roll in one time by entering and exiting the rolling mill frame by the above-mentioned roll changing device, and the roll changing efficiency is remarkably improved.
  • a roll changing device suitable for a multi-roll mill characterized in that:
  • the work roll of the multi-roll mill does not have a bearing seat, or the work roll has a bearing seat, but in the state of the roll change, the assembly of the work roll and the bearing seat has no less than the work roll assembly in the lateral movement direction of the rolled material in the frame. a laterally movable space of its own width, which allows another set of work rolls to coexist in the frame before the work roll is withdrawn from the frame;
  • the roll changing device has at least two rows of clamping heads, one row corresponding to the inlet side of the rolled material is called an inlet clamping head, and one row is adjacent to the outlet side of the rolled material is called an outlet clamping head, and each row of the clamping heads is
  • the utility model comprises a pair of upper and lower clamping heads, and the clamping heads are suspended parallel to each other.
  • clamping heads each include a bracket at the bottom, and the upper portion of the bracket is spaced apart from a clamping device capable of applying a force to the bracket to press the work roller.
  • clamping heads of the roller changing device are all connected to the clamping drive end.
  • a quick change work roll method using the above-mentioned roll changing device is characterized in that, by the roll changing device and the work roll carrier support, the roll changing device replaces the work roll once in and out of the rolling stand, specifically including the following steps:
  • the rolling mill is switched to the roll changing position, the roll gap is opened, the inlet side work roll carrier holds up a pair of old work rolls that need to be replaced, and the pair of old work rolls are traversed toward the inlet side of the rolling mill;
  • the roll changing device enters the rolling mill frame along the axial direction of the work roll, and the outlet clamping head is axially placed with the new work roll in the process;
  • the roll changing device exits the rolling mill frame: the inlet clamping head carries a pair of old work rolls, and the outlet clamping head is in an idle state;
  • each row of the clamping head can hold only a single work roll, that is, it can allow replacement of a single work roll.
  • the roll changing device is provided with a new work roll that is ready to be replaced before entering the frame to change the roll.
  • the work roll replacement process of the present invention is "with a new roll push-in with the old roll extraction", and the roll change device requires only one in 1 out of the roll stand to complete the main process of roll change.
  • the roll changing device has at least two sets of fixing devices (ie, the aforementioned clamping heads) for establishing a force relationship relationship with the work rolls, each group can hold at least one work roll, and the two sets of fixing devices can be independently clamped. Switch between the work roll and the release work roll to separate the fixed work relationship between the new work roll and the old work roll, and release the new work roll after the new roll is in place and fix the old work roll at the same time.
  • the goal of completing the roll change process is in and out of the rack.
  • the work roll method mentioned in the present invention utilizes the typical feature of such a multi-roll mill work roll without a bearing seat and a certain lateral movable space in the frame, and proposes a "with a new roller push-in- With the old roller extraction "two work processes: using the lateral movement space of the work roll in the frame, the old work roll moves laterally (along the direction of the inlet or outlet of the rolled material) a distance when the rolling mill is switched to the roll changing state, thereby giving The new work rolls first enter the rack to allow adequate space, and the new work rolls can be placed side by side with the old work rolls in the mill stand.
  • the present invention takes an 18-roll mill as an example to describe a typical quick change work roll implementation. Others such as a 20-roll mill, a 36-roll mill, etc. can also be used to achieve a quick roll change using a similar roll change method.
  • the work roll method of the present invention pushes the new work roll into the frame before the old work roll in the roll stand is withdrawn. Therefore, the process of changing the roll of the "no-load entry-extraction of the old roll-push-in new roll-no-load exit" of the conventional cold rolling mill to replace the work roll is simplified as "with a new roll push-in with the old roll" Workflow can effectively improve the efficiency of changing work rolls.
  • the method of changing the work roll of the invention reduces the number of times of the roll changing device, and can shorten the roll changing time by 30 to 60%, especially for the wide belt steel rolling mill, when the movement of the roll changing device into and out of the frame is large
  • the application of the present invention contributes to a significant shortening of the roll changing time and an increase in the operating rate of the rolling mill.
  • Fig. 1 is a view showing a rolling state of a multi-roll mill in the prior art.
  • Fig. 2 is a view showing a state in which the work rolls of Fig. 1 are prepared.
  • Figure 3 is a state diagram of the changing work roll of Figure 1 (the roll change car is outside the frame).
  • Figure 4 is a state diagram of the work roll of Figure 1 (with the roll changer in the frame).
  • FIG. 5 is a roll changing apparatus in accordance with an embodiment of the present invention.
  • Fig. 6 is another perspective view of Fig. 5.
  • Fig. 7 is a view showing the state in which the rolling mill is switched from the rolling state to the standby roller in accordance with the method for rapidly changing the work rolls according to the present invention.
  • Fig. 8 is a view showing the state of the work roll of the rolling mill according to the method for quickly changing the work roll according to the present invention (when the roll changer is outside the frame, when the new roll is pushed in).
  • Figure 9 is a diagram showing the state of the mill changing work rolls (the roll change cart is in the frame) implemented by the method of quickly changing the work rolls according to the present invention.
  • Figure 10 is a partial schematic view of the rolling mill changing work roll state (replacement roller in the frame) according to the method of quick change of the work roll according to the present invention (the intermediate roll is omitted).
  • Fig. 11 is a view showing the state of the work roll of the rolling mill which is carried out according to the method for rapidly changing the work roll according to the present invention (when the old roll is taken out, the intermediate roll is omitted).
  • the roll changing device is applicable to a multi-roll mill as shown in Figs. 5-6, characterized in that the multi-roll mill does not have a bearing housing, or the work roll has a bearing seat, but in the state of changing the roll
  • the work roll and the housing assembly have a lateral movement space in the frame transverse to the direction of the rolling material that is not less than the width of the work roll assembly. This space allows another set of work rolls before the work roll is pulled out of the frame.
  • the roll changing device 1 as shown in Fig. 5-6 has double row clamping heads (inlet clamping head 3 and outlet clamping head 2) corresponding to the inlet and outlet of the rolling material, respectively.
  • Both the inlet chuck 3 and the outlet chuck 2 include a pair of upper and lower chucks, and the four chucks are disposed in parallel with each other.
  • the inlet clamping head 3 and the outlet clamping head 2 each include a bottom bracket, and the upper portion of the bracket is provided with a clamping device capable of applying a force to the bracket to press the work roller.
  • the bracket is not limited to the shape in which the inner arc of the bush is matched with the work roll in the figure, as long as the shape of the work roll can be clamped, such as the v type.
  • both the inlet clamping head 3 and the outlet clamping head 2 are connected to the clamping drive end of the head end.
  • a quick change work roll method in accordance with the present invention is illustrated in Figures 7-11, with an 18 roll mill as an example of a typical quick change work roll implementation. Others such as a 20-roll mill, a 36-roll mill, etc. can also be used to achieve a quick roll change using a similar roll change method.
  • the invention utilizes the typical feature that the multi-roll mill work roll does not have a bearing seat and has a certain lateral movable space in the frame, and proposes two workflows of “pushing in a new roll-extracting the old roll”: Using the lateral movable space of the work roll moving along the rolling material in the frame, the old work roll moves laterally (along the direction of the inlet or outlet of the rolled material) for a certain distance when the rolling mill is switched to the roll changing state, so that the new work roll enters the machine first.
  • the rack flows out of the appropriate space and the new work rolls can be placed side by side with the old work rolls in the mill stand, as follows:
  • the rolling mill is switched to the roll changing position (as shown in Fig. 7), the roll gap is opened, and the pair of old work rolls 8 that need to be replaced are lifted by the inlet side work roll bracket (may also be single, here is an example) At the same time, it traverses toward the inlet side of the mill.
  • the roll changing device 1 enters the rolling mill frame, the outlet chucking head 2 carries a pair of new work rolls 8, and the inlet chucking head 3 is in an idle state;
  • the roll changing device 1 extends into the rolling mill frame, during which the outlet chucking head 2 is axially placed with the new work roll 8;
  • the roll changing device 1 exits the rolling mill frame: its inlet chuck 3 carries a pair of old work rolls 8, and the outlet chuck 2 is in an idle state;
  • the method for quickly changing the work roll of the invention reduces the number of movements of the roll changing device compared with the conventional roll changing method, and can shorten the roll changing time by 30 to 60%, especially when the movement stroke of the wide strip steel rolling mill and the roll changing device enters and exits the frame is large.
  • the application of the present invention contributes to a significant shortening of the roll changing time and an increase in the operating rate of the rolling mill.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Abstract

一种用于多辊轧机的换辊装置（1），在换辊状态下，工作辊与轴承座的装配件在机架内沿轧材横向运动方向具有不小于工作辊装配自身宽度的横向活动空间，这一活动空间允许另一组工作辊在该工作辊抽出机架之前与之并存于机架内。换辊装置具有至少两排夹持头，一排对应于轧材进口侧称为入口夹持头（3），一排靠近轧材出口侧称为出口夹持头（2），每一排夹持头均包括一对上下夹持头，各夹持头相互平行悬置。还涉及基于该换辊装置的快速更换工作辊的方法，通过换辊装置和工作辊托架托配合，换辊装置一次进出轧机机架完成工作辊更换，显著地提高了换辊效率。

Description

一种换辊装置及基于其的快速更换工作辊方法 技术领域
本发明属于多辊轧机技术领域，具体涉及一种多辊冷轧带材轧机的快速换辊结构和方法。
背景技术
在冷轧金属带材领域中，除2辊、4辊、6辊等辊数较少的机型外，一般将单台设备中轧辊数量超过6～8辊的轧机统称之为多辊轧机，如36辊轧机、20辊轧机、18辊轧机、12辊轧机、10辊轧机等。多辊轧机多用于轧制厚度较薄、强度较高等特殊要求产品，具有厚度精度好、板形优良等优势，被业界广泛的应用。
这类轧机的典型特征之一是：一般工作辊辊径设计尺寸较小，也不带轴承座，其在机架内依赖其它辊体共同夹持固定。在更换工作辊时，一般使用换辊装装置上带有的夹持机构夹住工作辊辊体的至少一端，从机架内抽出旧辊以及装入新辊。
现有的广泛使用多辊轧机换工作辊方法，其过程详细为：
(1)轧机切换到换辊位置，辊缝打开，工作辊托架托起工作辊；
(2)换辊装置夹持机构不带辊，进入轧机机架内；
(3)换辊装置轴向到位后，夹持机构夹持住旧工作辊；
(4)工作辊托架退回待机位，换辊装置将旧工作辊抽出轧机机架；
(5)换辊装置夹持机构夹住新工作辊，进入轧机机架内；
(6)换辊装置带新工作辊轴向到位后，工作辊托架托起工作辊，夹持机构松开工作辊；
(7)换辊装置退出轧机机架；
(8)换辊结束，轧机切换到轧制位置。
这一换辊过程，与一般的4辊、6辊轧机换辊方法较为类似，这一换辊装置结构及过程的基本示意图一般如图1-4所示的轧制状态图、换工作辊预备状态图、换工作辊状态图(换辊车在机架外)、换工作辊状态图(换辊车在机架内)。均为“空载进入-抽出旧辊-推入新辊-空载退出”流程，换辊装置需要在进出轧机机架2次，耗费时间较长。
发明内容
本发明要解决的技术问题是解决现有多辊轧机换辊效率不高的缺陷，提供一种换辊装置，结构简单操作方便，利用该装置可以方便夹持工作辊；同时提供一种多辊轧机的快速更换工作辊方法，通过前述的换辊装置可以一次进出轧机机架就将工作辊更换完毕，显著提高换辊效率。
为解决上述技术问题，本发明采用如下技术方案：
一种换辊装置，适用于多辊轧机，其特征在于：
所述多辊轧机工作辊不带轴承座，或工作辊带有轴承座、但在换辊状态下工作辊与轴承座的装配件在机架内沿轧材横向运动方向具有不小于工作辊装配自身宽度的横向活动空间，这一活动空间允许另一组工作辊在该工作辊抽出机架之前与之并存于机架内；
所述的换辊装置具有至少两排夹持头，一排对应于轧材进口侧称为入口夹持头，一排靠近轧材出口侧称为出口夹持头，每一排夹持头均包括一对上下夹持头，各夹持头相互平行悬置。
进一步的，所述夹持头均包括底部的托槽，托槽上部间隔设置能够向所述 托槽方向施加作用力将工作辊压紧的夹扣装置。
进一步的，所述换辊装置的夹持头均与夹持驱动端连接。
一种采用上述换辊装置的快速更换工作辊方法，其特征在于通过换辊装置和工作辊托架托配合，换辊装置一次进出轧机机架就将工作辊更换完毕，具体包括如下步骤：
(1)轧机切换到换辊位置，辊缝打开，入口侧工作辊托架托起需要更换的1对旧工作辊，同时横移该一对旧工作辊靠向轧机入口侧；
(2)换辊装置进入轧机机架，其出口夹持头带着1对新工作辊，入口夹持头空载状态；
(3)换辊装置沿工作辊轴向进入轧机机架中，此过程中出口夹持头带着新工作辊轴向到位；
(4)出口侧工作辊托架将新工作辊托住；
(5)换辊装置的入口夹持头将已经靠向入口侧的1对旧工作辊夹持住；
(6)入口侧工作辊托架缩回到轧制位，此时入口侧1对旧工作辊仅靠换辊装置的入口夹持头固定；同时，出口侧工作辊托架托起出口侧刚推入的1对新工作辊保持不动；
(7)换辊装置的出口夹持头松开位于出口侧的1对新工作辊，此时新工作辊仅靠出口侧工作辊托架托住；
(8)换辊装置退出轧机机架：其入口夹持头带着1对旧工作辊，出口夹持头空载状态；
(9)轧机切换到轧制位，辊缝闭合，出口侧工作辊托架缩回到轧制位，换辊结束。
上述技术方案中，上述步骤(1)-(9)更换工作辊时，出口侧与入口侧顺序反过来进行，即旧辊向出口侧靠，新辊从入口侧进来，旧辊和新辊两者错开即可。
上述技术方案中，每排夹持头能够仅夹持单根工作辊，即能够容许更换单根工作辊。
上述技术方案中，新工作辊在进入机架到位及旧工作辊被抽出机架之前，新工作辊与旧工作辊并存于轧机机架中，新工作辊与旧工作辊不应发生接触。
上述技术方案中，换辊装置在进入机架换辊之前，先带有预备换入的新工作辊。
由此，本发明工作辊更换流程为“带新辊推入-带旧辊抽出”，换辊装置只需要1进1出轧机机架，就能完成换辊的主要过程。
换辊装置拥有至少2组固定装置(即前述的夹持头)用于与工作辊之间建立力作用关系，每组可以夹持住至少1支工作辊，2组固定装置可以独立的在夹紧工作辊、松开工作辊状态之间切换，以便独立的切换与新工作辊、旧工作辊的固定关系，实现新辊到位后松开新工作辊并同时固定住旧工作辊、最终在一次进出机架行程中完成换辊流程的目标。
本发明提及的换工作辊方法，利用这类多辊轧机工作辊不带有轴承座、在机架内具有一定的横向活动空间这一典型特征，提出了一种“带新辊推入-带旧辊抽出”两个工作流程：利用工作辊在机架内的横向活动空间，旧工作辊在轧机切换到换辊状态时横向(沿着轧材入口或出口方向)移动一段距离，从而给新工作辊先进入机架留出适当空间，新工作辊可与旧工作辊并排放置在轧机机架内。本发明以18辊轧机为例，对一种典型快速换工作辊实现方式的描述。 其它如20辊轧机、36辊轧机等也可以使用类似的换辊方式实现快速换辊。
本发明换工作辊方法在轧机机架内的旧工作辊抽出之前，新工作辊已经推入机架。由此，将常规冷轧机轧机更换工作辊的“空载进入-抽出旧辊-推入新辊-空载退出”换辊过程简化为“带新辊推入-带旧辊抽出”两个工作流程，可以有效地提高换工作辊的效率。
本发明换工作辊方法相对传统的换辊方法减少了换辊装置的动作次数，可缩短换辊时间30～60％，特别是对于宽带钢轧机，换辊装置进出机架的运动行程较大时，应用本发明有助于显著缩短换辊时间，提高轧机的作业率。
附图说明
图1为现有技术中多辊轧机的轧制状态图。
图2为图1的换工作辊预备状态图。
图3为图1的换工作辊状态图(换辊车在机架外)。
图4为图1的换工作辊状态图(换辊车在机架内)。
图5为根据本发明实施的换辊装置。
图6为图5的又一立体图。
图7为依据本发明快速更换工作辊方法实施的轧机从轧制状态切换为换工作辊预备状态图。
图8为依据本发明快速更换工作辊方法实施的轧机换工作辊状态图(换辊车在机架外，新辊推入时)。
图9为依据本发明快速更换工作辊方法实施的轧机换工作辊状态图(换辊车在机架内)。
图10为依据本发明快速更换工作辊方法实施的轧机换工作辊状态图(换辊车在机架内)部分简图(省略掉中间辊)。
图11为依据本发明快速更换工作辊方法实施的轧机换工作辊状态图(旧辊抽出时，省略掉中间辊)。
具体实施方式
根据本发明实施的换辊装置如图5-6所示，适用于多辊轧机，其特征在于：所述多辊轧机不带轴承座，或工作辊带有轴承座、但在换辊状态下工作辊与轴承座的装配件在机架内沿轧材横向运动方向具有不小于工作辊装配自身宽度的横向活动空间，这一活动空间允许另一组工作辊在该工作辊抽出机架之前与之并存于机架内；如图5-6.所述的换辊装置1具有分别对应于轧材进口和出口所在的双排夹持头(入口夹持头3和出口夹持头2)，入口夹持头3和出口夹持头2均包括一对上下夹持头，四个夹持头相互平行设置。
进一步的，入口夹持头3和出口夹持头2均包括底部托槽，托槽上部设置能够向所述托槽方向施加作用力将工作辊压紧的夹扣装置。托槽不限于图中轴瓦状内部弧度与工作辊匹配的形状，只要能将工作辊夹住的形状，如v型均可。
进一步的，入口夹持头3和出口夹持头2均与头端的夹持驱动端连接。
根据本发明实施快速更换工作辊方法如图7-11所示，以18辊轧机为例，对一种典型快速换工作辊实现方式的描述。其它如20辊轧机、36辊轧机等也可以使用类似的换辊方式实现快速换辊。
本发明利用这类多辊轧机工作辊不带有轴承座、在机架内具有一定的横向活动空间这一典型特征，提出了一种“推入新辊-抽出旧辊”两个工作流程：利 用工作辊在机架内沿轧材运动的横向活动空间，旧工作辊在轧机切换到换辊状态时横向(沿着轧材入口或出口方向)移动一段距离，从而给新工作辊先进入机架流出适当空间，新工作辊可与旧工作辊并排放置在轧机机架内，详细如下：
(1)轧机切换到换辊位置(如图7)，辊缝打开，入口侧工作辊托架托起需要更换的1对旧工作辊8(也可以是单只，此处以1对为例)，同时横移靠向轧机入口侧。
(2)如图8所示，换辊装置1进入轧机机架，其出口夹持头2带着1对新工作辊8，入口夹持头3空载状态；
(3)换辊装置1伸入轧机机架中，此过程中出口夹持头2带着新工作辊8轴向到位；
(4)出口侧工作辊托架5将新工作辊8托住，如图9和10所示；
(5)换辊装置1的入口夹持头3将已经靠向入口侧的1对旧工作辊8夹持住，如图9和10；
(6)入口侧工作辊托架4缩回到轧制位(此时入口侧1对旧工作辊8仅靠换辊装置1的入口夹持头3固定)，同时，出口侧工作辊托架5托起出口侧刚推入的1对新工作辊8保持不动；
(7)出口夹持头2松开位于出口侧的1对新工作辊8(此时新工作辊8仅靠出口侧工作辊托架5托住)；
(8)如图11所示，换辊装置1退出轧机机架：其入口夹持头3带着1对旧工作辊8，出口夹持头2空载状态；
(9)轧机切换到轧制位(参照图1的通用轧机轧制状态)，辊缝闭合、出口侧工作辊托架5缩回到轧制位，换辊结束。
本发明快速更换工作辊方法相对传统的换辊方法减少了换辊装置的动作次数，可缩短换辊时间30～60％，特别是宽带钢轧机、换辊装置进出机架的运动行程较大时，应用本发明有助于显著缩短换辊时间，提高轧机的作业率。

Claims (8)

  1. 一种换辊装置，适用于多辊轧机，其特征在于：
    所述多辊轧机工作辊不带轴承座，或工作辊带有轴承座、但在换辊状态下工作辊与轴承座的装配件在机架内沿轧材横向运动方向具有不小于工作辊装配自身宽度的横向活动空间，这一活动空间允许另一组工作辊在该工作辊抽出机架之前与之并存于机架内；
    所述的换辊装置具有至少两排夹持头，一排对应于轧材进口侧称为入口夹持头，一排靠近轧材出口侧称为出口夹持头，每一排夹持头均包括一对上下夹持头，各夹持头相互平行悬置。
  2. 根据权利要求1所述的换辊装置，其特征在于：所述夹持头均包括底部的托槽，托槽上部间隔设置能够向所述托槽方向施加作用力将工作辊压紧的夹扣装置。
  3. 根据权利要求1所述的换辊装置，其特征在于：所述换辊装置的夹持头均与夹持驱动端连接。
  4. 一种采用上述权利要求1-3之一所述换辊装置的快速更换工作辊方法，其特征在于通过换辊装置和工作辊托架托配合，换辊装置一次进出轧机机架就将工作辊更换完毕，具体包括如下步骤：
    (1)轧机切换到换辊位置，辊缝打开，入口侧工作辊托架托起需要更换的1对旧工作辊，同时横移该一对旧工作辊靠向轧机入口侧；
    (2)换辊装置进入轧机机架，其出口夹持头带着1对新工作辊，入口夹持头空载状态；
    (3)换辊装置沿工作辊轴向进入轧机机架中，此过程中出口夹持头带着新工作辊轴向到位；
    (4)出口侧工作辊托架将新工作辊托住；
    (5)换辊装置的入口夹持头将已经靠向入口侧的1对旧工作辊夹持住；
    (6)入口侧工作辊托架缩回到轧制位，此时入口侧1对旧工作辊仅靠换辊装置的入口夹持头固定；同时，出口侧工作辊托架托起出口侧刚推入的1对新工作辊保持不动；
    (7)换辊装置的出口夹持头松开位于出口侧的1对新工作辊，此时新工作辊仅靠出口侧工作辊托架托住；
    (8)换辊装置退出轧机机架：其入口夹持头带着1对旧工作辊，出口夹持头空载状态；
    (9)轧机切换到轧制位，辊缝闭合，出口侧工作辊托架缩回到轧制位，换辊结束。
  5. 根据权利要求4所述的快速更换工作辊方法，其特征在于上述步骤(1)-(9)更换工作辊时，出口侧与入口侧顺序反过来进行，即旧辊向出口侧靠，新辊从入口侧进来，旧辊和新辊两者错开即可。
  6. 根据权利要求4所述的快速更换工作辊方法，其特征在于每排夹持头能够仅夹持单根工作辊。
  7. 根据权利要求4所述的快速更换工作辊方法，其特征在于新工作辊在进入机架到位及旧工作辊被抽出机架之前，新工作辊与旧工作辊并存于轧机机架中，新工作辊与旧工作辊不应发生接触。
  8. 根据权利要求4所述的快速更换工作辊方法，其特征在于换辊装置在进入机架换辊之前，先带有预备换入的新工作辊。
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