CN214078487U

CN214078487U - AGC pressing structure of plate and strip rolling mill

Info

Publication number: CN214078487U
Application number: CN202023277434.6U
Authority: CN
Inventors: 曹阳
Original assignee: China Erzhong Group Deyang Heavy Industries Co Ltd
Current assignee: Erzhong Deyang Heavy Equipment Co Ltd; China Erzhong Group Deyang Heavy Industries Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-08-31
Anticipated expiration: 2030-12-29

Abstract

The utility model discloses slab band rolling mill AGC pushes down the structure belongs to the rolling field of slab band, and the purpose is solved current complicated, the short problem of life of structure of pushing down. Two sets of screwdown are respectively arranged on two sides of an upper supporting roll bearing seat along the axial direction of a roller of the rolling mill, and each screwdown comprises a hydraulic cylinder and a long shaft; the hydraulic cylinder is arranged at the top of the rolling mill housing, and a press-down hole is formed in the rolling mill housing; the hydraulic cylinder is connected to the mill frame, the long shaft penetrates through a pressing hole of the mill housing, the top end of the long shaft is in butt joint with a piston rod of the hydraulic cylinder, and the bottom end of the long shaft is connected with an upper supporting roller bearing seat of the mill. The utility model discloses, arrange the pneumatic cylinder in the top of rolling mill memorial archway through the major axis, guaranteed that the pneumatic cylinder avoids horizontal impact effect, reduced the pneumatic cylinder and taken place the probability of leaking, appearing the unbalance loading, do benefit to the long service life who prolongs the pneumatic cylinder, reduce the maintenance and change the probability, reduce cost to simplify the reduction structure, reduced the plant maintenance point, the mounting and dismounting of reduction structure is more convenient, changes in the maintenance.

Description

AGC pressing structure of plate and strip rolling mill

Technical Field

The utility model belongs to the rolling field of slab band, it is specific slab band rolling mill AGC screwdown structure.

Background

The existing plate and strip rolling mill screwdown device mainly has two structures: one is an electric screw-down device, the position of which is controlled by an encoder, and the screw-down precision is low. The other type is an electric and short-stroke hydraulic pressing combined structure, the electric mechanism such as a pressing motor and a pressing speed reducer arranged at the top of a mill housing drives a pressing screw to move to realize long-stroke pressing operation, and the electric mechanism is arranged in a mill window to realize short-stroke pressing operation, so that the structure has the following defects:

firstly, the structure is complex, the processing and maintenance difficulty is high, the assembly and disassembly are inconvenient, and the cost is not saved;

secondly, because the hydraulic cylinder is arranged in the rolling mill window, under the influence of the horizontal impact force of the steel billet in a steel rolling state, the probability of leakage and unbalance loading of the hydraulic cylinder is increased, and the service life of the hydraulic cylinder is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that current screwdown structure is complicated, life is short, providing a strip mill AGC screwdown structure, its simple structure can effective increase of service life.

The utility model adopts the technical proposal that: the plate and strip rolling mill AGC screwdown structure is characterized in that two sets of screwdown devices are respectively arranged on two sides of an upper supporting roll bearing seat along the axial direction of a roller of a rolling mill, and each screwdown device comprises a hydraulic cylinder and a long shaft; the hydraulic cylinder is arranged at the top of the rolling mill housing, and a pressing hole which vertically penetrates through the rolling mill housing is arranged on the rolling mill housing; the hydraulic cylinder is connected to the mill frame, the long shaft penetrates through a pressing hole of the mill housing, the top end of the long shaft is in butt joint with a piston rod of the hydraulic cylinder, and the bottom end of the long shaft is connected with an upper supporting roller bearing seat of the mill.

Further, the device also comprises a sleeve and a pressing nut; the sleeve is T-shaped and comprises a flange disc part and a shaft part, the shaft part is in threaded connection with the screw-down nut, the screw-down nut is fixed in the screw-down hole, the rolling mill housing is matched with the flange disc part to form a vertical limiting position of the sleeve along the axial direction of the screw-down hole, and the long shaft is movably matched and connected with the sleeve along the axial direction of the sleeve.

Further, the sleeve is detachably connected with the rolling mill frame.

Further, the bottom of major axis is provided with pressure head structure, pressure head structure includes pressure head, sphere pad and briquetting, be provided with the recess of undercut on the briquetting, the sphere pad sets up in the recess, and the upper surface of sphere pad is the proud sphere that makes progress, the pressure head is fixed in the bottom of major axis, and its lower surface is the proud sphere that makes progress with the upper surface adaptation of sphere pad, just the briquetting is installed in the pressure head.

Further, an inner step surface is formed between the groove and the notch of the pressing block, the pressing head is of an inverted T shape with an outer step surface, the pressing head extends into the groove of the pressing block, and the outer step surface and the inner step surface are matched with each other to form axial limiting between the pressing block and the long shaft.

Furthermore, a pull rod is arranged between the pressing devices on two sides of the upper supporting roller bearing seat, one end of the pull rod is connected with a pressing block of one pressing device, and the other end of the pull rod is connected with a pressing block of the other pressing device.

The utility model has the advantages that: the utility model discloses, pass the screw-down hole on the rolling mill housing through the major axis and act on the backup roll bearing frame, arrange the pneumatic cylinder in the top of rolling mill housing, guaranteed that the pneumatic cylinder avoids the horizontal impact force effect of steel billet under the steel rolling state, reduced the pneumatic cylinder and taken place the probability of leaking, appearing the unbalance loading to do benefit to the long service life who prolongs the pneumatic cylinder, reduce the maintenance and change probability, reduce cost. And the hydraulic cylinder can complete the pressing stroke of the rolling mill, and the investment of electric mechanisms such as a motor and the like is avoided, so that the pressing structure is simplified, the equipment maintenance points are reduced, the pressing structure is more convenient to assemble and disassemble, and the maintenance is easier.

Drawings

FIG. 1 is a schematic view of a screw down device;

FIG. 2 is a schematic view of the screw down device installed in a rolling mill;

fig. 3 is a left side view of fig. 2.

In the figure, a rolling mill housing 1, a pressing hole 11, an upper support roller bearing seat 2, a hydraulic cylinder 3, a long shaft 4, a sleeve 5, a flange disc part 51, a shaft part 52, a pressing nut 6, a pressing head 7, an outer step surface 71, a spherical pad 8, a pressing block 9, an inner step surface 91 and a pull rod 10.

Detailed Description

The invention is further described below with reference to the following figures and examples:

as shown in fig. 1, 2 and 3, the AGC screwdown structure of a strip rolling mill is provided with a set of screwdown devices respectively arranged on two sides of an upper support roll chock 2 along the axial direction of a roll of the rolling mill, wherein each screwdown device comprises a hydraulic cylinder 3 and a long shaft 4; the hydraulic cylinder 3 is arranged at the top of the rolling mill housing 1, and a pressing hole 11 vertically penetrating through the rolling mill housing 1 is formed in the rolling mill housing 1; the hydraulic cylinder 3 is connected to a rolling mill frame, the long shaft 4 penetrates through a pressing hole 11 of the rolling mill housing 1, the top end of the long shaft is in butt joint with a piston rod of the hydraulic cylinder 3, and the bottom end of the long shaft is connected with an upper supporting roller bearing seat 2 of the rolling mill.

The utility model discloses a slab band rolling mill AGC screwdown structure, through connect major axis 4 on the piston rod at pneumatic cylinder 3, major axis 4 can pass the downthehole 11 of screwdown on the rolling mill housing 1 and act on supporting roller bearing frame 2, arrange pneumatic cylinder 3 at the top of rolling mill housing 1, compare in the rolling mill window with arranging pneumatic cylinder 3, can guarantee that pneumatic cylinder 3 avoids the horizontal impact effect of steel billet under the steel rolling state, pneumatic cylinder 3 has been reduced and has taken place to leak, the probability of unbalance loading appears, thereby do benefit to the long service life who prolongs the pneumatic cylinder, reduce the maintenance and change probability, and the cost is reduced. And the long shaft 4 penetrates through a pressing hole 11 of the mill housing 1 to be connected with the hydraulic cylinder 3 and the upper support roller bearing seat 2, so that the pressing stroke of the mill can be completed through the hydraulic cylinder 3, the investment of electric mechanisms such as a motor and the like is avoided, the pressing structure is simplified, equipment maintenance points are reduced, and the pressing structure is more convenient to assemble and disassemble and easier to maintain. In addition, the structure is simplified, so that the matching relation between parts is simplified, and the processing difficulty and the equipment cost are greatly reduced.

In order to improve the depressing accuracy, it is preferable to further include a sleeve 5 and a depressing nut 6; the sleeve 5 is T-shaped and comprises a flange disc part 51 and a shaft part 52, the shaft part 52 is in threaded connection with the screw-down nut 6, the screw-down nut 6 is fixed in the screw-down hole 11, the rolling mill housing 1 is matched with the flange disc part 51 to form vertical limiting of the sleeve 5 along the axial direction of the screw-down hole 11, and the long shaft 4 is movably matched and connected with the sleeve 5 along the axial direction of the sleeve 5.

The sleeve 5 is provided with a guide hole, the long shaft 4 is movably matched and connected with the sleeve 5 along the axial direction of the sleeve 5, the long shaft 4 is matched with the guide hole, and the long shaft 4 can move back and forth along the axial direction of the guide hole, so that the sleeve 5 can guide the long shaft 4. Sleeve 5 can with push down hole 11 transition fit, but the utility model discloses, through sleeve 5's axial region 52 and push down nut 6 threaded connection, push down nut 6 and install in push down hole 11 to make sleeve 5 dismantle the change more easily after wearing and tearing, can effectively reduce use cost.

In order to increase the secure reliability of the mounting of the sleeve 5, said sleeve 5 is detachably connected to the roll stand.

In order to improve the matching area between the long shaft 4 and the upper support roller bearing seat 2, preferably, a pressing head structure is arranged at the bottom end of the long shaft 4, the pressing head structure comprises a pressing head 7, a spherical pad 8 and a pressing block 9, a groove which is sunken downwards is formed in the pressing block 9, the spherical pad 8 is arranged in the groove, the upper surface of the spherical pad 8 is a spherical surface which protrudes upwards, the pressing head 7 is fixed at the bottom end of the long shaft 4, the lower surface of the pressing head is a spherical surface which is sunken upwards and matched with the upper surface of the spherical pad 8, and the pressing block 9 is arranged on the pressing head 7.

In order to facilitate local replacement of the pressure head structure, preferably, an inner step surface 91 is formed between the groove and the notch of the pressing block 9, the pressure head 7 is of an inverted T shape with an outer step surface 71, the pressure head 7 extends into the groove of the pressing block 9, and the outer step surface 71 and the inner step surface 91 are matched with each other to form axial limiting between the pressing block 9 and the long shaft 4. The structure only needs to replace the damaged part, does not need to be replaced integrally, and reduces the use cost.

Preferably, a pull rod 10 is arranged between the pressing devices on two sides of the upper supporting roller bearing seat 2, one end of the pull rod 10 is connected with a pressing block 9 of one pressing device, and the other end of the pull rod 10 is connected with a pressing block 9 of the other pressing device.

Claims

1. The AGC of the slab band rolling mill presses down the structure, its characteristic is: two sides of an upper supporting roll bearing seat (2) are respectively provided with a set of screw-down devices along the axial direction of a roller of the rolling mill, and each screw-down device comprises a hydraulic cylinder (3) and a long shaft (4);

the hydraulic cylinder (3) is arranged at the top of the rolling mill housing (1), and a pressing hole (11) which vertically penetrates through the rolling mill housing (1) is formed in the rolling mill housing (1); the hydraulic cylinder (3) is connected to a rolling mill frame, the long shaft (4) penetrates through a pressing hole (11) of the rolling mill housing (1), the top end of the long shaft is in butt joint with a piston rod of the hydraulic cylinder (3), and the bottom end of the long shaft is connected with an upper supporting roller bearing seat (2) of the rolling mill.

2. A strip mill AGC hold down as defined in claim 1 wherein: the device also comprises a sleeve (5) and a pressing nut (6); the sleeve (5) is T-shaped and comprises a flange disc portion (51) and a shaft portion (52), the shaft portion (52) is in threaded connection with the pressing nut (6), the pressing nut (6) is fixed in the pressing hole (11) and axially extends along the pressing hole (11), the rolling mill housing (1) and the flange disc portion (51) are matched to form a vertical limiting position of the sleeve (5), and the long shaft (4) and the sleeve (5) are movably matched and connected along the axial direction of the sleeve (5).

3. A strip mill AGC hold down as defined in claim 2 wherein: the sleeve (5) is detachably connected with the rolling mill frame.

4. A sheet mill AGC hold-down structure as defined in claim 1, 2 or 3 wherein: be provided with pressure head structure in the bottom of major axis (4), pressure head structure includes pressure head (7), sphere pad (8) and briquetting (9), be provided with the recess of undercut on briquetting (9), sphere pad (8) set up in the recess, and the upper surface of sphere pad (8) is the proruption sphere that makes progress, pressure head (7) are fixed in the bottom of major axis (4), and its lower surface is the proruption sphere with the upper surface adaptation of sphere pad (8), just briquetting (9) are installed in pressure head (7).

5. A strip mill AGC push down structure according to claim 4, characterized in that: step face (91) in forming between recess and the notch of briquetting (9), pressure head (7) are the type of falling T that has outer step face (71), in pressure head (7) stretched into the recess of briquetting (9), it was spacing to form the axial between briquetting (9) and major axis (4) mutually support through outer step face (71) and interior step face (91).

6. A strip mill AGC push down structure according to claim 5, characterized by: a pull rod (10) is arranged between the screwdown gears on two sides of the upper supporting roller bearing seat (2), one end of the pull rod (10) is connected with a pressing block (9) of one screwdown gear, and the other end of the pull rod is connected with a pressing block (9) of the other screwdown gear.