CN113070350B - Fixed bending roll shifting assembly structure, roll shifting device and roll shifting method - Google Patents
Fixed bending roll shifting assembly structure, roll shifting device and roll shifting method Download PDFInfo
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- CN113070350B CN113070350B CN202110518632.7A CN202110518632A CN113070350B CN 113070350 B CN113070350 B CN 113070350B CN 202110518632 A CN202110518632 A CN 202110518632A CN 113070350 B CN113070350 B CN 113070350B
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- thrust bearing
- radial bearing
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- 238000005452 bending Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 27
- 230000005465 channeling Effects 0.000 claims abstract description 11
- 238000013000 roll bending Methods 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims 1
- 210000003739 neck Anatomy 0.000 description 16
- 230000009471 action Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/40—Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention belongs to the technical field of plate/strip mill, and provides a fixed type bending roll shifting assembly structure, a roll shifting device and a roll shifting method. The roller assembly structure comprises a roller, a locking device, a roller bending device and a roller channeling device, wherein radial bearings are respectively arranged at two ends of the roller; one end of the roller is also provided with a thrust bearing; the roll shifting device is arranged as one and acts on the thrust bearing seat and is arranged coaxially with the roll. The roll shifting method is that when the rolling mill shifts the roll, the roll shifting device drives the thrust bearing seat and the roll to axially shift together, and the roll axially slides relative to the two radial bearing seats. The invention can solve the problem of unbalanced load of the bearing and the roller cylinder after the roller is moved by the fixed roller.
Description
Technical Field
The invention belongs to the technical field of plate/strip mill, and particularly relates to a fixed bending and channeling roll assembly structure, a channeling device and a channeling method.
Background
In the field of plate/strip mill, roll bending and roll shifting are important means of controlling plate shape and equalizing roll wear. In the aspect of hot rolling of the existing plate/strip, along with the progress of the bending technology in recent years, the fixed bending (the bending cylinder is fixed and does not move along with the working roll) is gradually replaced by the movable bending (the bending cylinder moves along with the working roll), and the bending mode is to axially move the roll, the bearing and the bearing seat of the roll (the same as the movable bending), but the bending cylinder does not move, so that the offset of the roll bearing relative to the center of the bending cylinder after the bending is caused, and the problems of unbalanced load of the roll bearing or the bending cylinder are caused. For example, in the existing patents CN200680037764.1, CN200710203401.7, ZL 201510174767.0, the unbalanced load problem is solved by controlling the resultant force of the roller bending cylinder or adding a guide beam, but the structure or control loop of the roller bending device is relatively complex, and the difficulty of designing, manufacturing and controlling the structure of the device is increased. Therefore, how to simplify the equipment structure and solve the unbalanced load problems of roller bearings or roller cylinders and the like is a core problem of fixed type bending design.
Disclosure of Invention
In view of the above, the present invention aims to provide a fixed roll bending and shifting assembly structure, a roll shifting device and a roll shifting method, so as to keep the relative positions of the roll bearing and the roll bending cylinder center at any roll shifting position unchanged, and avoid unbalanced load of the roll bearing or the roll bending cylinder.
The invention is realized by the following technical scheme:
The invention provides a fixed type bending and channeling roller channeling device which comprises a channeling roller hydraulic cylinder composed of a cylinder body, a piston rod and a cylinder cover, wherein a sliding sleeve is sleeved on the cylinder body, one of the cylinder body and the piston rod is provided with a guide block which axially slides and radially limits with the sliding sleeve, and the other one of the cylinder body and the piston is fixedly connected with the sliding sleeve.
The invention also provides a fixed bending roll assembly structure, which comprises a roll, a locking device, a roll bending device and the roll bending device; radial bearings which axially slide relative to the roll neck and are provided with radial bearing seats respectively are respectively arranged at two ends of the roll; the outer end of the roll on the side of the fixed end of the rolling mill is provided with a thrust bearing which is axially limited opposite to the roll neck and is provided with a thrust bearing seat; the roller shifting device is arranged as one and acts on the thrust bearing seat and is coaxially arranged with the roller, and a sliding sleeve in the roller shifting device is fixed on the fixed end of the rolling mill; the two radial bearing seats are respectively provided with a roller bending device correspondingly; one of the two radial bearing seats is fixedly connected to the mill housing through a locking device, and a connecting rod is arranged between the two radial bearing seats.
Further, a guide block in the roller shifting device is arranged on the cylinder body, the cylinder body is fixedly connected with the thrust bearing seat, the cylinder body axially moves together with the roller, and a piston rod in the roller shifting device is fixedly connected with the sliding sleeve through a flange, a backing plate and a clamping plate between the far end, which is away from the thrust bearing seat.
Further, a bushing is arranged between the sliding sleeve and the cylinder body in the roller shifting device.
Further, the guide block in the roller shifting device is arranged on the piston rod through the base plate, the base plate arranged on the piston rod is fixedly connected with the thrust bearing seat, the piston rod axially moves together with the roller, the piston rod extends out of the sliding sleeve at the far end deviating from the thrust bearing seat, and the cylinder body in the roller shifting device is in positioning connection with the sliding sleeve through the cylinder cover.
Further, the base plate and the guide block are of an integral structure.
Further, the radial bearings are four-row conical roller bearings, and the thrust bearings are two-row conical roller bearings; at most two radial bearings are arranged in a single radial bearing seat side by side; the length of the roll neck of the roll, which is matched with the radial bearing to move, is at least one time longer than the width of the radial bearing.
Further, the structure that the sliding sleeve is fixed on the rolling mill fixed end is: the sliding sleeve is directly connected with a radial bearing seat arranged at the fixed end of the rolling mill or is connected with the radial bearing seat through a locking device.
The invention also provides another alternative scheme of the fixed bending roll assembly structure, namely: the two roller shifting devices are symmetrically arranged on two sides of the central axis of the roller to replace one roller shifting device coaxially arranged on the central axis of the roller, the cylinder bodies of the two roller shifting devices are respectively fixed on the fixed end of the rolling mill, the sliding sleeves of the two roller shifting devices act on the thrust bearing seat and axially shift together with the roller, and the sliding sleeves are axially matched with the cylinder bodies in a sliding manner through a piston rod fixedly connected with the sliding sleeves; an axial sliding and radial limiting guide rod is arranged between the thrust bearing seat and the radial bearing seat adjacent to the thrust bearing seat.
The invention also provides a roller shifting method of the fixed bending roller, which is based on the fixed bending roller assembling structure and comprises the following steps: when the rolling mill rolls, the roll shifting device drives the thrust bearing blocks and the thrust bearings on the thrust bearing blocks to axially shift together with the rolling mill, and the rolling mill axially slides relative to the two radial bearing blocks and the radial bearings on the two radial bearing blocks.
The invention has the advantages that: the roller assembly structure, the roller shifting device and the roller shifting method solve the problems of unbalanced load of the bearings and the roller bending cylinders after the roller shifting of the fixed bending shifting roller, and realize the aims of shifting only the roller, not shifting the radial bearing and the radial bearing seat thereof during roller shifting.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a diagram of the relationship between the assembly of rolls and the assembly of a roll shifting device in a mill housing;
FIG. 2 shows the roll assembly and roll shifting apparatus of the present invention in a roll shifting null position;
FIG. 3/4 shows a state in which the roll assembly and roll shifting device of the present invention is shifted toward both sides of the roll;
FIG. 5 is a cross-sectional view A-A of FIG. 2;
FIG. 6 is an example of an embodiment of the roll shifting apparatus of the present invention in a conventional roll shifting manner;
FIG. 7 is another embodiment of a roll shifting apparatus of the present invention;
fig. 8 shows another embodiment of the roll-mounting structure of the present invention.
Reference numerals: 1 is a radial bearing seat A;2 is a radial bearing A;3 is a roller; 4 is a radial bearing seat B;5 is a radial bearing B;6, thrust bearing; pushing the bearing seat until the bearing seat is pushed; 8 is an end cover A;9 is an end cover B;10 is an end cover C;11 is a connecting rod; 12 is a backing ring; 13 is a guide block; 14 is a cylinder body; 15 is a sliding sleeve; 16 is a bushing; 17 is a cylinder cover; 18 is a flange; 19 is a piston rod; 20 is a backing plate; 21 is a clamping plate; 22 is a locking device; 23 is a roller bending device; 24 is a mill housing; 25 is a guide rod; 26 is a roll shifting device; a base plate 27.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Example 1
As shown in fig. 1-5, the fixed roll bending and shifting roll assembly structure in this embodiment includes a roll 3, a locking device 22, a roll bending device 23, a roll shifting device 26 and a rolling mill housing 24, where the roll 3 may define a fixed end and a free end according to the roll shifting state, that is, two sides of the roll 3 along the axial direction are roll necks, and the middle is a roll body, where only one (or two) radial bearings are arranged on the roll neck on one side for bearing radial force and being the free end; the other side roll neck is simultaneously provided with a (or two) radial bearing and a bidirectional thrust bearing which are respectively used for bearing radial force and axial force and are fixed ends, wherein the radial bearing is close to the roll body, and the thrust bearing is close to the roll end. Thus, the roller 3 is provided with a radial bearing B5 which axially slides relative to the roller neck and is provided with a radial bearing seat B4 at the fixed end of the rolling mill, the roller 3 is provided with a radial bearing A2 which axially slides relative to the roller neck and is provided with a radial bearing seat A1 at the free end of the rolling mill, and the roller 3 is also provided with a thrust bearing 6 which is positioned outside the radial bearing B5 and axially limited relative to the roller neck and is provided with a thrust bearing seat 7 at the fixed end of the rolling mill; the roll shifting device 26 acts on the thrust bearing seat 7 and provides axial shifting force for the roll 3; the two sets of roller bending devices 23 respectively act on the radial bearing seat A1 and the radial bearing seat B4 and provide radial roller bending force for the roller 3; a connecting rod 11 is arranged between the radial bearing seat A1 and the radial bearing seat B4, and one of the radial bearing seat A1 and the radial bearing seat B4 is fixedly connected through a locking device 22; the locking device 22 also acts on the mill housing 24 and serves to limit the axial displacement of the radial bearing block B4 (or of the radial bearing block A1); the thrust bearing seat 7 and the adjacent radial bearing seat B4 are of a structure which is defined in a radial direction and axially slides relatively.
Specifically, each roller assembly structure consists of a roller, a pair (or two pairs) of radial bearings and bearing seats thereof, and a bidirectional thrust bearing and bearing seats thereof. The radial bearing and the thrust bearing are arranged in separate bearing seats respectively, namely, the outer ring of the radial bearing A2 (radial bearing B5) is fixed in the corresponding radial bearing seat A1 (radial bearing seat B4), the radial bearing seat is axially limited and can not axially move relative to the radial bearing, the inner ring of the radial bearing is in clearance fit with the roll neck of the roll, and the roll neck of the roll can axially move relative to the roll 3 without axial limitation. The inner ring of the thrust bearing 6 is fixed on the roll neck, the outer ring is fixed on the thrust bearing 7, and the inner ring and the outer ring are respectively axially limited on the roll neck and the thrust bearing 7, and the thrust bearing 7 and the thrust bearing 6 can not axially move on the roll 3. Meanwhile, the radial bearing seat B4 of the fixed end of the rolling mill and the radial bearing seat A1 of the free end of the rolling mill are connected together in a mechanical mode, namely, the connecting rod 11 is connected and guided by a window of a rolling mill housing 24 where the connecting rod is positioned, meanwhile, a mechanical locking device 22 is arranged on the rolling mill housing 24 to limit the axial displacement of the rolling mill housing, and under the action of the bending force of a bending roll device 23, the radial bearing and the radial bearing seat thereof can only lift in the window of the rolling mill housing and cannot axially float, so that the bending roll force and the center of the radial bearing are always overlapped, and unbalanced load is avoided. In addition, the thrust bearing seat 7 is provided with axial guiding and rotation prevention by the guiding component matched with the corresponding roller shifting device 26 or/and the adjacent radial bearing seat B4, and drives the rollers 3 to axially shift together under the action of the roller shifting device 26, and the radial bearing seat B4 does not shift. The roller bending device 23 and the roller shifting device 26 are driven by hydraulic cylinders. When the rolling mill runs, only the roller, the thrust bearing and the bearing seat thereof axially run, the roller radial bearing and the bearing seat thereof do not run, and the roller neck axially slides relative to the radial bearing.
The radial bearings A2 and B5 in the present embodiment each use four-row conical roller bearings, and the thrust bearing 6 uses two-row conical roller bearings. The end cover C10 and the radial bearing seat A1 or the radial bearing seat B4 are fixed together through bolts and used for limiting the axial direction of the outer ring of the radial bearing A2 or the radial bearing B5, and a step for resisting the radial bearing is arranged at the inner side end corresponding to the end cover C10 in the radial bearing seat. Similarly, the end cover A8 and the thrust bearing seat 7 are fixedly connected together through bolts and are used for limiting the axial direction of the outer ring of the thrust bearing 6. The two ends of the inner ring of the thrust bearing 6 are respectively pressed on the end part of the roll neck at one side of the roll 3 through a lining ring 12 and an end cover B9, and are used for limiting the axial direction of the inner ring of the thrust bearing 6. At most two radial bearings A2 or B5 are arranged on a single radial bearing block A1 or B4. The roll 3 is shifted by a roll shifting stroke (typically 150+150=300 mm) at least one time longer than the width of the radial bearing A2 (radial bearing B5) in the length of the roll neck of the mating radial bearing A2 (radial bearing B5).
The axial locking of the radial bearing housing in this embodiment is: one end of the radial bearing seat B4 is provided with a convex locking ear (not marked), and the other end is mechanically connected with the radial bearing seat A1 through a connecting rod 11. The locking lugs are embedded in the clamping grooves formed by the roller bending device 23 and the locking device 22, so that the axial limit of the radial bearing seat A1 and the radial bearing seat B4 is realized. The side surfaces of the radial bearing blocks are guided by the roller bending device 23, and the radial bearing blocks A1 and B4 and the radial bearings A2 and B5 thereof do not move axially during the roller 3 channeling process.
The roller shifting device 26 in the embodiment is arranged on the central axis of the roller 3, namely, the roller shifting device and the roller shifting device are in a coaxial arrangement structure, and are formed by a cylinder body 14, a piston rod 19, a cylinder cover 17, a sliding sleeve 15 and the like in a double-rod hydraulic cylinder mode; the piston rod 19 is coaxial with the roller 3, the sliding sleeve 15 is sleeved on the cylinder body 14 and is fixedly connected with the radial bearing seat B4 adjacent to the thrust bearing seat 7, one end of the piston rod 19 is in sliding connection with the roller 3, the other end of the piston rod 19 is fixedly connected with the sliding sleeve 15 at one end deviating from the radial bearing seat B4, the guide block 13 is fixedly arranged on the cylinder body 14 and is in sliding connection with the sliding sleeve 15, and the cylinder body 14 is fixedly connected with the thrust bearing seat 7 and is in sliding connection with the sliding sleeve 15. In this way, the thrust bearing 7 is directly fixed with the cylinder block 14 of the roll shifting device 26, and the thrust bearing 7 is prevented from rotating and guiding by the roll shifting device 26 to ensure that the thrust bearing does not rotate with the roll.
In this embodiment, a bushing 16 is disposed between the sliding sleeve 15 and the cylinder 14, and a piston rod 19 is fixedly connected with the sliding sleeve 15 through a flange 18, a backing plate 20 and a clamping plate 21. The bushing 16 is in interference connection with the sliding sleeve 15 and is in clearance fit with the cylinder 14, so that the axial guiding of the cylinder 14 and the thrust bearing seat 7 is realized.
Example two
As shown in fig. 6, this embodiment is different from the above embodiment in that: the fixed connection of the sliding sleeve 15 to the radial bearing block B4 is carried out by a locking device 22. I.e. by means of locking means 22, which cooperate with locking ears (not marked) provided on the sliding sleeve 15. Thus, when the roll is being shifted, the cylinder block 14 moves axially together with the thrust bearing 7, the roll 3, etc., and the piston rod 19 and the radial bearing block B4 cannot move axially while being restricted by the locking device 22. The roller shifting device is combined with conventional roller assembly to realize roller shifting (axial shifting of the bearing seat and the roller together) in a conventional manner, at the moment, the cylinder body and the bearing seat are mounted together, the locking lugs are arranged on the sliding sleeve, the locking lugs on the roller bearing seat are cancelled, the locking device on the mill housing 24 limits the axial displacement of the sliding sleeve, and the roller and the integral axial roller shifting of the bearing seat can be realized under the action of hydraulic oil.
Example two
As shown in fig. 7, this embodiment is different from the first and second embodiments described above in that: the cylinder body 14 is fixedly connected with the sliding sleeve 15 to replace the fixed connection of the cylinder body 14 and the thrust bearing 7, the piston rod 19 is fixedly connected with the thrust bearing 7 to replace the connection of the piston rod 19 and the roller 3, the guide block 13 is connected with the piston rod 19 through the base plate 27 to replace the fixed connection of the guide block 13 and the cylinder body 14, and the piston rod 19 extends out of the sliding sleeve 15 at the deviating end deviating from the roller 3 to replace the fixed connection of the piston rod 19 and the sliding sleeve 15. In this way, the thrust bearing 7 is fixed with the piston rod 19 of the roller shifting device 26, and the thrust bearing 7 can be prevented from rotating and guiding by the roller shifting device 26, so that the thrust bearing cannot rotate along with the roller.
Example IV
As shown in fig. 8, the present embodiment is different from the above-described embodiment in that: the two roller shifting devices 26 symmetrically arranged on two sides of the central axis of the roller 3 replace one roller shifting device 26 coaxially arranged on the central axis of the roller 3, the cylinder bodies 14 of the two roller shifting devices 26 are respectively fixed on the fixed end of the rolling mill, the sliding sleeves 15 of the two roller shifting devices 26 are both acted on the thrust bearing seat 7 and axially shift together with the roller 3, and the sliding sleeves 15 are axially matched with the cylinder bodies 14 in a sliding way through the piston rods 19 fixedly connected with the sliding sleeves; an axially sliding and radially limited guide rod 25 is arranged between the thrust bearing seat 7 and the radial bearing seat B4 adjacent to the thrust bearing seat 7. In this way, the guide rod 25 is arranged on the thrust bearing seat 7 and is in sliding connection with the radial bearing seat B4 adjacent to the thrust bearing seat 7, or the guide rod 25 is arranged on the radial bearing seat B4 adjacent to the thrust bearing seat 7 and is in sliding connection with the thrust bearing seat 7; the thrust bearing block 7 is prevented from rotating and guided directly by the cooperation of the guide bar 25 with the radial bearing block B4 to ensure that the thrust bearing block does not rotate with the roll. The locking lugs (not marked) arranged on the thrust bearing seat 7 are embedded in the locking grooves of the roller shifting devices 26 at the two sides of the mill housing 24 to realize the axial positioning of the roller 3 and the thrust bearing seat 7, and the axial locking device 22 of the radial bearing seat is arranged at the other end of the roller 3. In addition, in order to ensure that the sliding sleeve in the roller shifting device does not radially rotate with the cylinder body, a guide block can be arranged on the cylinder body to limit the radial rotation of the sliding sleeve.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The roller shifting device comprises a roller shifting hydraulic cylinder composed of a cylinder body (14), a piston rod (19) and a cylinder cover (17), and is characterized in that a sliding sleeve (15) is sleeved on the cylinder body (14), and a guide block (13) which axially slides and radially limits between one of the cylinder body (14) and the piston rod (19) and the sliding sleeve (15) is arranged on the cylinder body;
the roller shifting device and the roller (3) are coaxially arranged and adopt a double-rod hydraulic cylinder mode;
The piston rod (19) is coaxial with the roller (3), the sliding sleeve (15) is sleeved on the cylinder body (14) and is fixedly connected with the radial bearing seat B (4) adjacent to the thrust bearing seat (7), one end of the piston rod (19) is in sliding connection with the roller (3), the other end of the piston rod is fixedly connected with the sliding sleeve (15) at one end deviating from the radial bearing seat (B) 4, the guide block (13) is fixedly arranged on the cylinder body (14) and is in sliding connection with the sliding sleeve (15), and the cylinder body (14) is fixedly connected with the thrust bearing seat (7) and is in sliding connection with the sliding sleeve (15).
2. A fixed bending roll assembly structure comprising a roll (3), a locking device (22) and a roll bending device (23), characterized by further comprising a roll bending device (26) according to claim 1; radial bearings which axially slide relative to the roll neck and are respectively provided with radial bearing seats are respectively arranged at two ends of the roll (3); the outer end of the roller (3) at the side of the fixed end of the rolling mill is provided with a thrust bearing (6) which is axially limited opposite to the roller neck and is provided with a thrust bearing seat (7); the roller shifting device (26) is arranged as one and acts on the thrust bearing seat (7) and is coaxially arranged with the roller (3), and a sliding sleeve in the roller shifting device (26) is fixed on the fixed end of the rolling mill; the two radial bearing seats are respectively provided with a roller bending device (23); one of the two radial bearing seats is fixedly connected to a mill housing (24) through a locking device (22), and a connecting rod (11) is arranged between the two radial bearing seats;
The guide block (13) in the roller shifting device (26) is arranged on the cylinder body (14), the cylinder body (14) is fixedly connected with the thrust bearing seat (7), the cylinder body (14) axially shifts together with the roller (3), and the piston rod (19) in the roller shifting device (26) is fixedly connected between the far end deviating from the thrust bearing seat (7) and the sliding sleeve (15) through the flange (18), the base plate (20) and the clamping plate (21);
a bushing (16) is further arranged between the sliding sleeve (15) and the cylinder body (14) in the roller shifting device (26).
3. The fixed bending and channeling roll assembly structure according to claim 2, characterized in that the guide block (13) in the channeling roll device (26) is arranged on the piston rod (19) through the base disc (27), the base disc (27) arranged on the piston rod (19) is fixedly connected with the thrust bearing seat (7), the piston rod (19) axially moves together with the roll (3), the distal end of the piston rod (19) deviating from the thrust bearing seat (7) extends out of the sliding sleeve (15), and the cylinder body (14) in the channeling roll device (26) is in positioning connection with the sliding sleeve (15) through the cylinder cover (17).
4. A stationary roll-in-roll assembly structure according to claim 3, characterized in that the base plate (27) and the guide block (13) are of unitary construction.
5. The stationary roll-in-roll assembly structure according to claim 2, characterized in that the radial bearings are four rows of conical roller bearings and the thrust bearings (6) are two rows of conical roller bearings; at most two radial bearings are arranged in a single radial bearing seat side by side; the length of a roll neck of the roll (3) matched with the radial bearing to move is at least one time longer than the width of the radial bearing.
6. The stationary roll-in-roll assembly structure according to claim 2, wherein the sliding sleeve (15) is fixed to the stationary end of the rolling mill by: the sliding sleeve (15) is directly connected with a radial bearing seat arranged at the fixed end of the rolling mill or is connected with the radial bearing seat through a locking device (22).
7. The fixed bending roll assembly structure according to claim 2, wherein two roll shifting devices (26) symmetrically arranged on two sides of a roll central axis replace one roll shifting device coaxially arranged on the roll central axis, the cylinder bodies of the two roll shifting devices are respectively fixed on the fixed end of the rolling mill, sliding sleeves (15) of the two roll shifting devices both act on thrust bearing blocks (7) and axially shift together with the roll (3), and the sliding sleeves (15) are axially matched with the cylinder bodies (14) in a sliding manner through piston rods (19) fixedly connected with the sliding sleeves; a guide rod (25) which is axially sliding and radially limited is arranged between the thrust bearing seat (7) and the radial bearing seat adjacent to the thrust bearing seat.
8. A stationary roll shifting method based on the stationary roll shifting roller assembly structure according to any one of claims 2 to 7, the roll shifting method comprising: when the rolling mill rolls, the roll shifting device (26) drives the thrust bearing blocks (7) and the thrust bearings (6) on the thrust bearing blocks to axially shift together with the roller (3), and the roller (3) axially slides relative to the two radial bearing blocks and the radial bearings on the radial bearing blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110518632.7A CN113070350B (en) | 2021-05-12 | 2021-05-12 | Fixed bending roll shifting assembly structure, roll shifting device and roll shifting method |
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| CN202110518632.7A CN113070350B (en) | 2021-05-12 | 2021-05-12 | Fixed bending roll shifting assembly structure, roll shifting device and roll shifting method |
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| CN113070350B true CN113070350B (en) | 2024-05-17 |
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| CN113070350A (en) | 2021-07-06 |
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