CN110814057A - Strip steel tail pressing device of rolling mill and strip steel cold rolling system - Google Patents

Abstract

The invention provides a strip steel tail pressing device of a rolling mill and a strip steel cold rolling system, wherein the strip steel tail pressing device of the rolling mill comprises a roller frame body, an upper roller side-by-side mechanism, a lower roller side-by-side mechanism and a pressing driving mechanism, wherein the upper roller side-by-side mechanism, the lower roller side-by-side mechanism and the pressing driving mechanism are arranged on the roller frame body; the upper roller side-by-side mechanism comprises a first upper roller and a second upper roller, and an upper roller gap is formed between the first upper roller and the second upper roller; the lower roller side-by-side mechanism comprises a first lower roller and a second lower roller, and a lower roller gap is formed between the first lower roller and the second lower roller; the first upper roller, the first lower roller, the second upper roller and the second lower roller are distributed in sequence along the material flow direction; the pressing driving mechanism is used for driving the upper roller side-by-side mechanism and the lower roller side-by-side mechanism to be relatively close to or far away from each other. The invention solves the technical problem that the rolling equipment has poor stability of the post tension provided by the strip steel after the strip steel is flapped in the rolling process.

Description

Strip steel tail pressing device of rolling mill and strip steel cold rolling system

Technical Field

The invention relates to the technical field of cold rolling production lines, in particular to a strip steel tail pressing device of a rolling mill and a strip steel cold rolling system.

Background

At present, reversible rolling refers to a rolling process in which a strip steel is repeatedly subjected to multi-pass rolling deformation on a rolling mill to finally obtain the thickness of a finished product. And the steel coil is conveyed to an uncoiler by steel coil conveying equipment, the uncoiler uncoils the steel coil in the first pass, and the strip head of the strip steel passes through a rolling mill and enters a rear coiler to be coiled. The front and rear tension of the strip steel in the rolling process is provided by an uncoiler, a rolling mill and a rear coiler. And at the end of the first pass rolling, after uncoiling, the strip steel with the tail flicked is separated from the coiling machine and moves to a front coiling machine at the inlet side of the rolling mill, and after the strip tail is clamped by a coiling block jaw of the front coiling machine, the strip steel is repeatedly rolled for multiple times between the front coiling machine, the rear coiling machine and the rolling mill.

In the first pass of rolling process, the strip steel is uncoiled and flapped and the strip tail reaches a section before a front coiling machine, and the strip tail is in a free tension-free state. For the subsequent rolling, a back tension is applied to the strip tail of the strip.

The steel strip pressing plate device is generally adopted to provide back tension for the steel plate after the uncoiling and the tail flicking of the uncoiler, and comprises an upper pressing plate and a lower pressing plate, the upper pressing plate is pressed down by a hydraulic cylinder during working, certain friction force is generated between the steel plate and a hardwood, so that the back tension is generated between the steel plate after the uncoiling and the tail flicking and a rolling mill, and the rolling of the first pass of a single stand is stabilized.

In order to provide larger back tension and reduce the damage to the surface of the strip steel, the upper and lower press plates in the strip steel press plate device are made of hard wood. However, compared with steel, the hardwood has softer texture, and friction causes rapid wear of the hardwood, so that the friction surface condition is deteriorated, the friction coefficient between the hardwood and the hard surface is unstable, and the stability of the back tension is reduced; hardwood also suffers from chip shedding during operation. Therefore, the strip steel pressing plate device made of hardwood materials has poor stability of the back tension applied to strip steel, easily influences the quality of a rolling section, reduces the yield and needs to frequently replace hardwood plates.

Disclosure of Invention

The invention aims to provide a strip steel tail pressing device of a rolling mill and a strip steel cold rolling system, which are used for relieving the technical problem that the stability of the rolling equipment on the post tension provided by strip steel is poor after the strip steel swings in the rolling process.

The above object of the present invention can be achieved by the following technical solutions:

the invention provides a strip steel tail pressing device of a rolling mill, which comprises: the roller frame body, an upper roller side-by-side mechanism, a lower roller side-by-side mechanism and a pressing driving mechanism are arranged on the roller frame body; the upper roller side-by-side mechanism comprises a first upper roller and a second upper roller, and an upper roller gap is formed between the first upper roller and the second upper roller; the lower roller side-by-side mechanism comprises a first lower roller and a second lower roller, and a lower roller gap is formed between the first lower roller and the second lower roller; and the first upper roller, the first lower roller, the second upper roller and the second lower roller are distributed in sequence along the material flow direction; the pressing driving mechanism is used for driving the upper roller side-by-side mechanism and the lower roller side-by-side mechanism to be relatively close to or far away from each other.

In a preferred embodiment, the axis of the first upper roller, the axis of the second upper roller, the axis of the first lower roller, and the axis of the second lower roller are all perpendicular to the flow direction.

In a preferred embodiment, a limiting jackscrew used for being abutted against the lower roller side-by-side mechanism is connected to the lower side of the upper roller side-by-side mechanism, and/or a limiting jackscrew used for being abutted against the upper roller side-by-side mechanism is connected to the upper side of the lower roller side-by-side mechanism.

In a preferred embodiment, the upper roller side-by-side mechanism includes an upper bearing housing for mounting the first upper roller and the second upper roller, and the lower roller side-by-side mechanism includes a lower bearing housing for mounting the first lower roller and the second lower roller, both the upper bearing housing and the lower bearing housing being mounted to the roller frame body.

In a preferred embodiment, the lower bearing housing is fixedly mounted to the roller frame body; the pressing driving mechanism comprises a tail pressing hydraulic cylinder arranged on the roller frame body, and the tail pressing hydraulic cylinder is connected with the upper bearing seat to drive the upper roller side-by-side mechanism to move up and down.

In a preferred embodiment, a locking plate is detachably attached to the roller frame body, and the locking plate abuts against the upper bearing housing and the lower bearing housing, respectively, to define an axial position of the upper bearing housing and an axial position of the lower bearing housing.

In a preferred embodiment, the lower roller side-by-side mechanism is provided with a roller changing roller; the belted steel of rolling mill is pressed the tail device including locating roll change gyro wheel below roll change crossbeam frame and with the jacking pneumatic cylinder that roll change crossbeam frame is connected, be equipped with on the roll change crossbeam frame and follow the glide plane of the axis direction extension of first bottom roll, and, the jacking pneumatic cylinder can drive roll change crossbeam frame rebound extremely the glide plane with roll change gyro wheel butt.

In a preferred embodiment, an end of the roll changing cross beam is provided with an ejection jackscrew for pushing the lower roll side-by-side mechanism to move along the sliding surface.

In a preferred embodiment, a raised structure is arranged on the top of the lower bearing seat; the strip steel tail pressing device of the rolling mill comprises a roll changing lock frame, and the roll changing lock frame can be matched with the protruding structure in a locking mode so as to be connected with the lower bearing seat.

In a preferred embodiment, the strip tailing press of the rolling mill comprises a traverse device connected to the roller frame body for driving the roller frame body to move in the axial direction of the first lower roller.

In a preferred embodiment, the traverse device comprises a base, a traverse slide rail mounted on the base, and a traverse hydraulic cylinder, the roller frame body is mounted on the traverse slide rail, and the traverse hydraulic cylinder is in transmission connection with the roller frame body.

In a preferred embodiment, the strip tailing press of the rolling mill comprises a roll changing stand, the traverse device can drive the roll frame body to move to be connected with the roll changing stand, and the upper roll side-by-side mechanism and the lower roll side-by-side mechanism can move to the roll changing stand.

In a preferred embodiment, the strip steel tail pressing device of the rolling mill comprises a drag chain, a drag chain frame and a cross beam, wherein the drag chain frame is fixedly arranged; a first end of the cross beam is fixed to the roller frame body, and a second end of the cross beam extends to the outer side of the roller frame body near the roll changing table; the first end of the drag chain is connected to the drag chain frame, and the second end of the drag chain is connected to the cross beam.

The invention provides a strip steel cold rolling system, which comprises: the strip steel tail pressing device of the rolling mill is arranged on the feeding side of the reversible rolling mill.

The invention has the characteristics and advantages that:

after the strip steel is uncoiled and flapped, the strip tail of the strip steel moves to a position between an upper roller side-by-side mechanism and a lower roller side-by-side mechanism in a strip steel tail pressing device of the rolling mill, a pressing driving mechanism drives an upper roller side-by-side mechanism and a lower roller side-by-side mechanism to be relatively close to each other, the first upper roller and the second upper roller are abutted to the upper surface of the strip steel, and the first lower roller and the second lower roller are abutted to the lower surface of the strip steel.

Because an upper roll gap is arranged between the first upper roll and the second upper roll, a lower roll gap is arranged between the first lower roll and the second lower roll, and the first upper roll, the first lower roll, the second upper roll and the second lower roll are distributed in sequence along the material flow direction, the strip steel can be elastically deformed under the action of pressing force, and the first upper roll, the first lower roll, the second upper roll and the second lower roll apply relatively stable back tension to the strip steel.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is an axonometric view of a strip steel tailing device of a rolling mill provided by the invention at a rolling tailing position;

FIG. 2 is an axonometric view of a strip steel tail pressing device of a rolling mill provided by the invention at a maintenance position;

FIG. 3 is a front view of a strip tailing press of the rolling mill shown in FIG. 2;

FIG. 4 is a side view of a strip tailing press of the rolling mill shown in FIG. 2;

FIG. 5 is a schematic view of the rollers in the strip tailing press of the rolling mill provided by the present invention;

FIG. 6 is a side view of the upper roller side-by-side mechanism in the tail rolling apparatus of the rolling mill according to the present invention;

FIG. 7 is a front elevational view of the upper roller side by side mechanism shown in FIG. 6;

FIG. 8 is a side view of the lower roll side-by-side mechanism in the strip tail rolling apparatus of the rolling mill provided by the present invention;

FIG. 9 is a front view of the lower roller side by side mechanism shown in FIG. 8;

FIG. 10 is a schematic structural diagram of a roll-changing beam frame in a strip steel tail pressing device of a rolling mill provided by the invention;

FIG. 11 is an isometric view from a first perspective of a roll change cage in a strip tail rolling apparatus of a rolling mill provided in accordance with the present invention;

FIG. 12 is an isometric view from a second perspective of a roll change cage in a strip tail rolling apparatus of a rolling mill provided in accordance with the present invention;

FIG. 13 is a schematic diagram of a cold strip rolling system of a rolling mill provided by the present invention.

The reference numbers illustrate:

10. a roller frame body; 11. a frame body; 12. a sliding seat; 13. a supporting seat; 14. a locking plate; 100. a direction of flow;

110. an upper roller side-by-side mechanism; 111. a first upper roller; 112. a second upper roller; 113. an upper bearing seat; 114. a coupling shaft; 115. a pin shaft; 116. feeding a roll gap;

120. a lower roller side-by-side mechanism; 121. a first lower roller; 122. a second lower roller; 123. a lower bearing seat; 124. limiting jackscrews; 125. roller changing rollers; 126. a lower roll gap; 127. a groove structure;

130. a pressing drive mechanism; 131. a tail pressing hydraulic cylinder;

140. a roll changing cross beam frame; 141. a sliding surface; 142. ejecting a jackscrew;

150. a jacking hydraulic cylinder;

160. roll changing and frame locking; 161. a protrusion; 162. a protruding edge part; 163. a boss;

20. a traversing device; 21. a base; 22. a hydraulic cylinder is transversely moved; 23. transversely moving the sliding rail;

30. a roll changing rack;

401. a cross beam; 402. a drag chain; 403. a drag chain frame;

1. an uncoiler; 2. a front coiler; 3. a strip steel tail pressing device; 4. a reversible mill; 5. and a rear coiling machine.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

The present invention provides a strip tailing press of a rolling mill, as shown in fig. 1, 2 and 5, comprising: a roller frame body 10, an upper roller arranging mechanism 110, a lower roller arranging mechanism 120 and a pressing drive mechanism 130 which are mounted on the roller frame body 10; the upper roller side-by-side mechanism 110 comprises a first upper roller 111 and a second upper roller 112, and an upper roller gap 116 is arranged between the first upper roller 111 and the second upper roller 112; the lower roller side-by-side mechanism 120 comprises a first lower roller 121 and a second lower roller 122, and a lower roller gap 126 is arranged between the first lower roller 121 and the second lower roller 122; and as shown in fig. 5, the first upper roller 111, the first lower roller 121, the second upper roller 112 and the second lower roller 122 are distributed in this order along the flow direction 100; the pressing driving mechanism 130 serves to drive the upper roller side-by-side mechanism 110 and the lower roller side-by-side mechanism 120 relatively close to or away from each other.

After the strip steel is uncoiled and flapped, the strip tail of the strip steel moves between the upper roller side-by-side mechanism 110 and the lower roller side-by-side mechanism 120, the pressing driving mechanism 130 drives the upper roller side-by-side mechanism 110 and the lower roller side-by-side mechanism 120 to be relatively close to each other until the first upper roller 111 and the second upper roller 112 abut against the upper surface of the strip steel, and the first lower roller 121 and the second lower roller 122 abut against the lower surface of the strip steel.

Because the upper roll gap 116 is arranged between the first upper roll 111 and the second upper roll 112, the lower roll gap 126 is arranged between the first lower roll 121 and the second lower roll 122, and the first upper roll 111, the first lower roll 121, the second upper roll 112 and the second lower roll 122 are distributed in sequence along the material flow direction 100, the strip steel can be elastically deformed under the pressing force, and the first upper roll 111, the first lower roll 121, the second upper roll 112 and the second lower roll 122 exert relatively stable back tension on the strip steel.

Compared with the band steel pressing plate device made of hardwood materials, the band steel tail pressing device of the rolling mill has larger difference. In the band steel pressing plate device made of hardwood materials, an upper pressing plate and a lower pressing plate are in plane contact with band steel respectively, during actual production, the incoming state of the band steel is different, wave shape or water and oil can appear on the band steel, and foreign matters on the shape and the surface of the band steel have great influence on the contact state of the upper pressing plate, the lower pressing plate and a steel plate, so that the friction condition is changed, and the post tension is more unstable; in addition, the upper and lower pressing plates and the strip steel provide back tension in a friction mode, so that the heating phenomenon can occur, and the stability of the back tension is adversely affected.

The material of each roller in the strip tail pressing device can be 9Cr2 Mo. The material and thickness of the plate are increased according to the production specification, and the distance between the rollers is increased so as to ensure a certain wrap angle; the outer diameter of each roller can be unchanged within a certain plate variation range, and mainly needs to meet the requirements of structure and space.

In the strip steel tail pressing device of the rolling mill, a first upper roller 111 and a second upper roller 112 are positioned above a first lower roller 121 and a second lower roller 122, a material flow roller gap is formed between the upper roller side-by-side mechanism 110 and the lower roller side-by-side mechanism 120, and the first upper roller 111 and the second upper roller 112 in the upper roller side-by-side mechanism 110 and the first lower roller 121 and the second lower roller 122 in the lower roller side-by-side mechanism 120 form a mutually staggered structure, so that the post tension is more stable; the first upper roller 111, the second upper roller 112, the first lower roller 121 and the second lower roller 122 are in rolling contact with the strip steel, so that abrasion and heat generated by the rollers are reduced relative to sliding contact, the contact condition is kept stable, the stability of back tension is improved, and the service life of each roller is prolonged.

After the strip steel is flapped, the direction of the strip tail of the strip steel pointing to the strip head is the material flow direction. As shown in fig. 5, the axis of the first upper roller 111, the axis of the second upper roller 112, the axis of the first lower roller 121, and the axis of the second lower roller 122 are all perpendicular to the flow direction 100. Preferably, the axis of the first upper roller 111, the axis of the second upper roller 112, the axis of the first lower roller 121, and the axis of the second lower roller 122 are all parallel to a horizontal plane. A material guide plate is arranged on the feeding side of the strip steel tail pressing device of the rolling mill, so that strip steel can be conveniently guided into a material flow roll gap.

In an embodiment of the present invention, the upper roller aligning mechanism 110 includes upper bearing housings 113 provided at both ends thereof, and both ends of the first upper roller 111 and both ends of the second upper roller 112 are respectively mounted to the upper bearing housings 113 through bearings; the lower roller side-by-side mechanism 120 includes lower bearing seats 123 provided at both ends thereof, and both ends of the first lower roller 121 and both ends of the second lower roller 122 are respectively mounted to the lower bearing seats 123 through bearings; the upper bearing housing 113 and the lower bearing housing 123 are mounted to the roller frame body 10.

As shown in fig. 3, the roller frame body 10 is provided with a frame hole, and the upper bearing housing 113 and the lower bearing housing 123 are provided in the frame hole and contact with a sidewall of the frame hole to define radial positions of the upper roller side-by-side mechanism 110 and the lower roller side-by-side mechanism 120. The roller frame body 10 is connected with a lock plate 14, and the lock plate 14 abuts against the upper bearing housing 113 and the lower bearing housing 123, respectively, to define the axial position of the upper bearing housing 113 and the axial position of the lower bearing housing 123.

At least one of the upper roller side-by-side mechanism 110 and the lower roller side-by-side mechanism 120 can slide up and down in the roller frame body 10 to effect the pressing of the strip and the release of the strip. As shown in fig. 3, the roller frame body 10 is provided with a supporting seat 13, and a lower bearing seat 123 is connected to the supporting seat 13 through a bolt, so that the position of the lower roller side-by-side mechanism 120 is relatively fixed; the pressing drive mechanism 130 includes a tail-pressing hydraulic cylinder 131 mounted to the roller frame body 10, and the tail-pressing hydraulic cylinder 131 is connected to the upper bearing housing 113 to drive the upper roller side-by-side mechanism 110 to move up and down. Referring to fig. 6 and 7, the upper bearing housing is provided with a coupling shaft 114 and a pin 115, the pin 115 is connected to the upper bearing housing 113 along the axial direction of the first upper roller 111 and penetrates through the coupling shaft 114 to connect the lower end of the coupling shaft 114 to the upper bearing housing 113, and the upper end of the coupling shaft 114 is connected to the piston rod of the tail-pressing hydraulic cylinder 131. Preferably, the pressing driving mechanism 130 includes two tail pressing hydraulic cylinders 131, and the tail pressing hydraulic cylinders 131 are respectively connected to the upper bearing blocks 113 at both ends.

Further, as shown in fig. 6 and 7, a limit top wire 124 for abutting against the lower roller side-by-side mechanism 120 is connected to a lower side of the upper roller side-by-side mechanism 110, and/or, as shown in fig. 8 and 9, a limit top wire 124 for abutting against the upper roller side-by-side mechanism 110 is connected to an upper side of the lower roller side-by-side mechanism 120, so as to limit a limit position at which the upper roller side-by-side mechanism 110 moves downward, and control the magnitude of the pressing force applied to the strip steel.

The structure of each production equipment in a rolling line is generally compact, and the distance between the equipment is small, so the inventor further improves the strip tail pressing device of the rolling mill: the strip tailing device of the rolling mill includes a traverse device 20, and the traverse device 20 is connected to the roller frame body 10 for driving the roller frame body 10 to move in the axial direction of the first lower roller 121 to switch the roller frame body 10 between a tailing rolling position and a maintenance position. When the roller frame body 10 moves to the rolling tail pressing position, the roller frame body 10 and each roller therein cooperate with a rolling mill in a rolling line to provide back tension; when the roller frame body 10 moves to the maintenance position, the roller frame body 10 leaves the rolling line, so that a space is reserved for front and rear equipment of the strip steel tail pressing device of the rolling mill, and the strip steel tail pressing device of the rolling mill and the front and rear equipment thereof can be conveniently maintained.

Further, the traverse device 20 includes a base 21, a traverse slide rail 23 mounted on the base 21, and a traverse hydraulic cylinder 22, the roller frame 10 is mounted on the traverse slide rail 23, and the traverse hydraulic cylinder 22 is in driving connection with the roller frame 10. As shown in fig. 1, the piston rod of the traverse cylinder 22 is extended to push the roller frame body 10 to the rolling tail-pressing position. The forces and tilting moments exerted on the roller frame body 10 in the material flow direction 100 are taken over by the cross runners 23. The end of the base 21 is provided with a fixed stop to restrain the lateral position of the roller frame body 10. The roller frame body 10 includes a slide base 12 and a frame body 11 fixed above the slide base 12, and the slide base 12 is fixed to a slider on a traverse slide rail 23.

After removing the locking plate 14, the bolts connecting the lower bearing housing 123 with the bearing housing 13, and the coupling shaft 114 and the pin shaft 115 connecting the upper bearing housing 113 and the tail pressing hydraulic cylinder 131, the upper roller side-by-side mechanism 110 and the lower roller side-by-side mechanism 120 can be removed from the frame holes to facilitate the replacement of the respective rollers.

As shown in fig. 2 and 3, the strip tailing press of the rolling mill includes a roll changing stand 30, and the traverse device 20 can drive the roll frame body 10 to move to be connected with the roll changing stand 30 so as to pull the upper roll juxtaposing mechanism 110 and the lower roll juxtaposing mechanism 120 onto the roll changing stand 30 along the axial direction of the first lower roll 121, thereby reducing the difficulty of operation.

In one embodiment of the present invention, the lower roller side-by-side mechanism 120 is provided with a roller changing roller 125; the strip steel tail pressing device of the rolling mill comprises a roll changing cross beam frame 140 arranged below a roll changing roller 125 and a jacking hydraulic cylinder 150 connected with the roll changing cross beam frame 140, wherein a sliding surface 141 extending along the axial direction of a first lower roller 121 is arranged on the roll changing cross beam frame 140, and the jacking hydraulic cylinder 150 can drive the roll changing cross beam frame 140 to move upwards until the sliding surface 141 abuts against the roll changing roller 125.

When disassembling, firstly, the bolt connecting the lower bearing block 123 and the supporting seat 13 is disassembled; then the jacking hydraulic cylinder 150 drives the roll changing cross beam frame 140 to ascend, the sliding surface 141 is contacted with the roll changing roller 125, and the roll changing cross beam frame 140 bears the lower roller side-by-side mechanism 120; after the lock plate 14 is removed, the lower roller side-by-side mechanism 120 can be pushed or pulled to move on the sliding surface 141 in the axial direction of the first lower roller 121.

Specifically, when the jacking hydraulic cylinder 150 contracts, a gap is formed between the sliding surface 141 and the roll changing roller 125. The top of the roll changing table 30 is provided with a track surface for bearing the roll changing roller 125; when the jacking hydraulic cylinder 150 extends out, the sliding surface 141 and the rail surface are positioned on the same plane, so that the lower roller side-by-side mechanism 120 is pulled to the roller changing rack 30 from the sliding surface 141; preferably, when the jacking cylinder 150 is extended, the roll changing cross beam frame 140 lifts the lower roll side-by-side mechanism 120 a distance upward to disengage the lower bearing block 123 from the supporting seat 13, so as to pull the lower roll side-by-side mechanism 120 to move.

The roll change cross-beam 140 comprises two sections of steel cross-beams coupled in parallel. Further, as shown in fig. 3 and 10, an end portion of the roll changing cross beam frame 140 far away from the roll changing rack 30 is provided with an ejection jack screw 142, and when the ejection jack screw 142 is rotated, the ejection jack screw 142 moves along the axial direction of the first lower roll 121 to push the lower roll side-by-side mechanism 120 to move along the sliding surface 141, so that difficulty in pulling the lower roll side-by-side mechanism 120 out of the frame hole is reduced.

In one embodiment of the present invention, the lower bearing housing 123 and the upper bearing housing 113 are provided with a groove structure 127; the strip steel tail pressing device of the rolling mill further comprises a roll changing locking frame 160, as shown in fig. 11 and 12, a protrusion 161 is arranged on the roll changing locking frame 160, and the groove structure 127 and the protrusion 161 are matched to form a mortise and tenon joint structure; the roll changing lock frame 160 is provided with a protruding edge part 162 for buckling the long edges of the upper and lower bearing seats and a boss 163 for propping the outer sides of the upper and lower bearing seats, and because the bearing seats are internally provided with self-aligning roller bearings, the roll changing lock frame 160 integrates the upper roll side-by-side mechanism 110 and the lower roll side-by-side mechanism 120 of the upper and lower duplex rolls into a whole, so that the bearing seats can be prevented from falling along the roll shaft direction when being pulled out, and the lower roll side-by-side mechanism 120 can be driven to move outwards of the roll frame body 10 together by pulling the roll changing lock frame 160. Preferably, a pull ring is provided on the roll-changing lock frame 160.

Further, at the time of disassembly, the roll change lock bracket 160 is mounted on top of the lower bearing housing 123; then the tail pressing hydraulic cylinder 131 drives the upper roller parallel mechanism 110 to move downwards, and the upper bearing pedestal 113 is contacted with the roller changing lock frame 160; and then the connecting shaft 114 and the pin shaft 115 which connect the upper bearing seat 113 and the tail pressing hydraulic cylinder 131 are removed, so that the upper bearing seat 113 falls onto the roll changing lock frame 160, at this time, the upper bearing seat 113 and the lower bearing seat 123 are connected together through the roll changing lock frame 160, and the upper roll arranging mechanism 110 and the lower roll arranging mechanism 120 are pulled together onto the roll changing rack 30 by pulling the roll changing lock frame 160.

The tail-pressing hydraulic cylinder 131 and the jacking hydraulic cylinder 150 are connected with pipelines which can move along with the movement of moving parts of the device. Because the front and rear devices are compact and the space between the devices is limited, the pipeline needs to be planned in a centralized way, and the pipe clamp is adopted for restraining so as to avoid interference. As shown in fig. 1-4, the strip tail pressing device of the rolling mill comprises a drag chain 402, a drag chain frame 403 and a cross beam 401, wherein a pipeline is arranged on the cross beam 401 so as to enter the drag chain 402, and the drag chain frame 403 is fixedly arranged on the ground or at the end of the traverse device 20 close to the roll changing table frame 30; a first end of the cross beam 401 is fixed to the roller frame body 10, and a second end of the cross beam 401 extends to the outside of the roller frame body 10 near the roll changing stand 30; a first end of the drag chain 402 is connected to the drag chain frame 403 and a second end of the drag chain 402 is connected to the cross beam 401. The cross beam 401 guides the pipeline out of the range of motion of the roller frame body 10 and then into the drag chain 402, so that the pipeline can be prevented from interfering with the roller frame body 10 and peripheral equipment.

Example two

The invention provides a strip steel cold rolling system, which comprises: the strip steel tail pressing device 3 of the rolling mill is arranged on the feeding side of the reversible rolling mill 4, and provides back tension for the strip tail of the strip steel after tail flicking.

Specifically, the strip steel cold rolling system further includes an uncoiler 1, a front coiler 2 and a rear coiler 5, and referring to fig. 13, the uncoiler 1, the front coiler 2, the strip steel tail pressing device 3, the reversing mill 4 and the rear coiler 5 are sequentially distributed along the material flow direction 100. In the first pass rolling, tensioning is firstly carried out by the uncoiler 1 and the rear coiling machine 5 at the outlet side of the reversible rolling mill 4; after uncoiling is finished, the strip tail is separated from the uncoiler 1, the strip tail of the strip steel is between the uncoiler 1 and the reversible rolling mill 4, a longer distance is in a tension-free state, and at the moment, the strip steel tail pressing device 3 acts; after the strip tail runs between the strip steel tail pressing device 3 and the front coiling machine 2, the strip tail returns to the front coiling machine 2 and is clamped by a winding drum jaw of the front coiling machine 2, at the moment, the tail pressing device does not work any more, and a tension closed loop is formed by the front coiling machine 2, the reversible rolling mill 4 and the rear coiling machine 5. The reversible rolling mill 4 may be a single stand reversible rolling mill or a double stand reversible rolling mill.

The above description is only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.

Claims (14)

1. A strip steel tail pressing device of a rolling mill is characterized by comprising: the roller frame body, an upper roller side-by-side mechanism, a lower roller side-by-side mechanism and a pressing driving mechanism are arranged on the roller frame body; the upper roller side-by-side mechanism comprises a first upper roller and a second upper roller, and an upper roller gap is formed between the first upper roller and the second upper roller; the lower roller side-by-side mechanism comprises a first lower roller and a second lower roller, and a lower roller gap is formed between the first lower roller and the second lower roller; and the first upper roller, the first lower roller, the second upper roller and the second lower roller are distributed in sequence along the material flow direction;

the pressing driving mechanism is used for driving the upper roller side-by-side mechanism and the lower roller side-by-side mechanism to be relatively close to or far away from each other.

2. The strip tailing press of a rolling mill of claim 1, wherein the axis of the first upper roll, the axis of the second upper roll, the axis of the first lower roll, and the axis of the second lower roll are all perpendicular to the flow direction.

3. The strip steel tailing pressing device of the rolling mill as claimed in claim 2, wherein a limiting jackscrew for abutting against the lower roller side-by-side mechanism is connected to the lower side of the upper roller side-by-side mechanism, and/or a limiting jackscrew for abutting against the upper roller side-by-side mechanism is connected to the upper side of the lower roller side-by-side mechanism.

4. The strip tailing press of a rolling mill of claim 1, wherein the upper roller side-by-side mechanism includes an upper bearing housing for mounting the first upper roller and the second upper roller, and the lower roller side-by-side mechanism includes a lower bearing housing for mounting the first lower roller and the second lower roller, the upper bearing housing and the lower bearing housing being mounted to the roller frame body.

5. The strip steel tailing device of a rolling mill according to claim 4, wherein the lower bearing seat is fixedly provided to the roller frame body;

the pressing driving mechanism comprises a tail pressing hydraulic cylinder arranged on the roller frame body, and the tail pressing hydraulic cylinder is connected with the upper bearing seat to drive the upper roller side-by-side mechanism to move up and down.

6. The strip tailing press of a rolling mill of claim 4, wherein a locking plate is detachably attached to the roller frame body, the locking plate abutting against the upper bearing housing and the lower bearing housing, respectively, to define an axial position of the upper bearing housing and an axial position of the lower bearing housing.

7. The strip steel tailing device of a rolling mill according to claim 6, wherein the lower roll side-by-side mechanism is provided with roll changing rollers;

the belted steel of rolling mill is pressed the tail device including locating roll change gyro wheel below roll change crossbeam frame and with the jacking pneumatic cylinder that roll change crossbeam frame is connected, be equipped with on the roll change crossbeam frame and follow the glide plane of the axis direction extension of first bottom roll, and, the jacking pneumatic cylinder can drive roll change crossbeam frame rebound extremely the glide plane with roll change gyro wheel butt.

8. The strip tailing press of a rolling mill as claimed in claim 7, wherein an end portion of said roll changing cross beam is provided with an ejector pin for pushing said lower rolls side by side mechanism to move along said sliding surface.

9. The strip steel tailing pressing device of the rolling mill as claimed in claim 7, wherein a convex structure is arranged at the top of the lower bearing seat; the strip steel tail pressing device of the rolling mill comprises a roll changing lock frame, and the roll changing lock frame can be matched with the protruding structure in a locking mode so as to be connected with the lower bearing seat.

10. The strip tailing press for a rolling mill of claim 1, comprising a traverse device connected to the roller frame body for driving the roller frame body to move in an axial direction of the first lower roller.

11. The strip tailing press for a rolling mill of claim 10, wherein the traverse device comprises a base, a traverse slide mounted to the base, and a traverse hydraulic cylinder, the roller frame body being mounted to the traverse slide, the traverse hydraulic cylinder being drivingly connected to the roller frame body.

12. The strip tailing press of a rolling mill of claim 11, comprising a roll changing stand, wherein the traverse device can drive the roller frame body to move to be connected with the roll changing stand, and wherein the upper roller side-by-side mechanism and the lower roller side-by-side mechanism can move to the roll changing stand.

13. The strip steel tailing pressing device of the rolling mill according to claim 12, wherein the strip steel tailing pressing device of the rolling mill comprises a drag chain, a drag chain frame and a cross beam, and the drag chain frame is fixedly arranged; a first end of the cross beam is fixed to the roller frame body, and a second end of the cross beam extends to the outer side of the roller frame body near the roll changing table; the first end of the drag chain is connected to the drag chain frame, and the second end of the drag chain is connected to the cross beam.

14. A cold strip rolling system, comprising: a reversible rolling mill and a strip tailing device of a rolling mill according to any one of claims 1 to 13, which is arranged on the feed side of the reversible rolling mill.

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