Controllable cooling and lubricating device for copper plate strip hot rolling mill

Abstract

A controllable cooling and lubricating device of copper strip hot rolling mill is provided with an upper spraying beam between the upper balance hangers corresponding to the two sides of the upper roller, the upper spraying beam is fixedly connected with the upper balance hangers at both ends, and a plurality of upper nozzles are arranged in an array at the bottom of the upper spraying beam; a water squeezing roller is rotatably arranged at the upper part of both sides of the upper roller, and the outer circle of the water squeezing roller is in contact with the outer circle of the upper roller; when the controllable cooling and lubricating device of the copper strip hot rolling mill works, the nozzles of the upper spraying beam spray a large amount of emulsion to cool the upper roller, a large amount of emulsion is acted on by the water squeezing roller in contact with the upper roller, the redundant emulsion is discharged from both ends of the upper roller, and only a uniform and extremely thin emulsion film is left on the surface of the upper roller for lubrication between the roller and the copper strip, thereby solving the problem that a large amount of emulsion directly flows on the copper strip, causing the temperature of the copper strip to rapidly drop, and simultaneously relieving the surface oxidation of the copper strip under high temperature, improving the surface quality and yield of the copper strip product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot rolling of various metal strip blanks, and particularly relates to a controllable cooling and lubricating device for a copper strip hot rolling mill. BACKGROUND

[0002] Under hot rolling conditions, copper ingots are usually heated to 820-900 DEG C, and a large amount of heat is rapidly transferred to the rolls in the rolling process, which can aggravate the wear of the rolls and even cause the surface of the rolls to crack and peel off. Meanwhile, in the reciprocating rolling process, the surface of the copper strip is easily oxidized at high temperature, which affects the surface quality and yield of the finished product. With the expansion of copper strip product varieties and the improvement of user requirements for product quality, hot rolling lubrication technology has attracted widespread attention and is widely used.

[0003] The existing method using hot rolling lubrication technology is that a large amount of emulsion is sprayed on the rolls to cool the rolls during hot rolling, and the emulsion enters between the rolls and the copper strip to fully lubricate. However, this brings a serious problem. After a large amount of emulsion flows onto the strip, a large amount of heat is taken away from the strip, causing the temperature of the rolled piece to rapidly decrease, so that the subsequent rolling force greatly increases, and the reduction in the amount of pressure causes the rolling pass to increase, greatly affecting the rolling production efficiency of the copper strip. Even the final rolling temperature cannot be guaranteed due to the rapid decrease in the temperature of the copper strip, resulting in the scrap of the rolled piece. Therefore, it is required that the emulsion flowing onto the rolled piece is as little as possible to reduce the temperature drop of the rolled piece, which is contradictory to the requirement of large-flow emulsion cooling of the rolls. If the rolls cannot be cooled well, cracks and even peeling of the surface of the rolls will occur, which seriously affects the service life of the hot rolls. In addition, due to the large lifting range of the rolls on the hot rolling mill (the thickness of the copper ingot is greatly different from the thickness of the copper strip), and the consideration of the emulsion pipe line for replacing the rolls and the maintenance space, the traditional hot rolling lubrication and cooling device has been difficult to meet the production and process requirements. SUMMARY

[0004] In order to overcome the deficiencies in the background art, the application discloses a controllable cooling lubricating device of a copper plate strip hot rolling mill, which is characterized in that a plurality of upper spray beams are arranged between the upper balance hangers corresponding to the two sides of the upper roller, the two ends of the upper spray beams are fixedly connected with the upper balance hangers, and a plurality of upper nozzles are arranged in an array at the bottom of the upper spray beams; and a plurality of water squeezing rollers are rotatably arranged at the two sides of the upper part of the upper roller, and the outer circumferences of the water squeezing rollers are in contact with the outer circumference of the upper roller.

[0005] In order to achieve the object of the present application, the present application adopts the following technical solution: a controllable cooling lubricating device for a copper plate strip hot rolling mill, the copper plate strip hot rolling mill comprising a rolling mill housing, an upper roller bearing seat, an upper balance suspension rod, and an upper roller; two upper roller bearing seats are symmetrically arranged, and are movably arranged on the inner side surfaces of the two side columns of the rolling mill housing; two upper balance suspension rods are arranged at each upper roller bearing seat, and are symmetrically arranged on the two sides of the upper roller bearing seat and fixedly connected with the upper roller bearing seat; the upper roller is rotatably arranged between the upper roller bearing seats; a lower roller is movably arranged at the lower part of the upper roller; an upper spraying beam is arranged between the corresponding upper balance suspension rods on the two sides of the upper roller, the upper spraying beam is fixedly connected with the upper balance suspension rods at the two ends thereof, and a plurality of upper nozzles are arranged in an array at the bottom of the upper spraying beam; a water squeezing roller is rotatably arranged at the upper part of the upper roller on the two sides thereof, and the outer circumference of the water squeezing roller is in contact with the outer circumference of the upper roller; during the copper plate strip hot rolling process, a large amount of emulsion is sprayed from the nozzles of the upper spraying beam to cool the upper roller, so as to prevent the upper roller from being abraded and cracked due to excessive temperature rise, and to prolong the service life of the upper roller; after a large amount of emulsion is acted on by the water squeezing roller in contact with the upper roller, the excess emulsion is discharged from the two ends of the upper roller, and only a uniform and extremely thin emulsion film is left on the surface of the upper roller for lubrication between the roller and the copper plate strip, so as to reduce the abrasion of the upper roller and the rolling force, thereby solving the problem that a large amount of emulsion directly flows on the copper plate strip, causing the temperature of the copper plate strip to rapidly decrease, and also alleviating the surface oxidation of the copper plate strip at high temperature, and improving the surface quality and yield of the copper plate strip product; in addition, the upper spraying beam fixedly arranged on the upper balance suspension rod rises and falls synchronously with the upper roller, thereby solving the problems of plugging and unplugging of the emulsion pipeline and insufficient maintenance space during the lifting adjustment and replacement of the upper roller; moreover, since the upper spraying beam rises and falls synchronously with the upper roller, the positional relationship between the upper spraying beam and the upper roller is always maintained, and the problem of unstable cooling effect caused by the change of the position between the upper spraying beam and the upper roller during the lifting of the upper roller is solved.

[0006] The upper balance suspender corresponding to the two sides of the upper roller is further provided with an air cooling spray beam, the two ends of the air cooling spray beam are fixedly connected with the upper balance suspender, and the side surface of the air cooling spray beam facing the upper roller is provided with a plurality of air cooling nozzles; the air cooling spray beam is arranged to further improve the cooling effect of the upper roller; since the surface temperature of the upper roller is too high, when the emulsion is sprayed on the surface of the upper roller, the emulsion is rapidly vaporized to form a vaporization film on the surface of the upper roller, the vaporization film separates the emulsion from the surface of the upper roller, and the cooling effect of the emulsion on the upper roller is poor; especially after the structure of the extrusion roller is increased, the contact time of the surface of the upper roller with a large amount of emulsion is shortened, and the problem is more serious; the extremely thin emulsion film formed after the extrusion roller evaporates further at a high temperature, and finally the amount of emulsion between the upper roller and the copper plate strip is reduced; after the high-speed airflow sprayed by the air cooling spray beam pre-cools the upper roller, the serious vaporization phenomenon of the emulsion sprayed on the surface of the upper roller is avoided; the upper roller works in a reciprocating manner of clockwise rotation and counterclockwise rotation, and the air cooling spray beams on the two sides of the upper roller work alternately according to the different rotation directions of the upper roller; when the upper roller rotates clockwise, the air cooling spray beam on the left side of the upper roller works; when the upper roller rotates counterclockwise, the air cooling spray beam on the right side of the upper roller works, so as to avoid that the high-speed airflow sprayed by the air cooling spray beam destroys the extremely thin emulsion film formed on the upper roller.

[0007] Further, the water squeezing roller support arms at the two ends of the water squeezing roller are fixedly provided with a water blocking plate between the two water squeezing roller support arms, and the water blocking plate is in contact with the outer circumference of the water squeezing roller; the water blocking plate is arranged to prevent the emulsion sprayed on the surface of the upper roller from splashing onto the surface of the copper plate strip.

[0008] Further, the water squeezing roller support arms at the two ends of the water squeezing roller are fixedly provided with a water blocking plate between the two water squeezing roller support arms, and the water blocking plate is in contact with the outer circumference of the water squeezing roller; the water blocking plate is arranged to prevent the emulsion sprayed on the surface of the upper roller from splashing onto the surface of the copper plate strip.

[0009] Further, the upper roller guide plates are adjustably arranged on the two sides of the lower part of the upper roller, and the upper roller guide plates are provided with a gap with the outer circumference of the upper roller; the upper roller guide plates ensure normal bite in the hot rolling of the copper plate strip, and further prevent the emulsion from splashing onto the surface of the copper plate strip.

[0010] Further, the lower roller is fixedly provided with a lower spray beam on both sides, the two ends of the lower spray beam are fixedly connected with the two side columns of the rolling mill housing, and the side of the lower spray beam facing the lower roller is provided with a plurality of lower nozzles in an array; the nozzles of the lower spray beam spray a large amount of emulsion to cool the lower roller, so as to prevent the lower roller from being abraded and cracked due to high temperature rise, and prolong the service life of the lower roller; since the large amount of emulsion sprayed by the nozzles of the lower spray beam automatically flows downward, a large amount of emulsion will not flow onto the copper strip, so that the squeeze roller does not need to be arranged at the lower roller.

[0011] Further, the lower roller is fixedly provided with a lower spray beam on both sides, the two ends of the lower spray beam are fixedly connected with the two side columns of the rolling mill housing, and the side of the lower spray beam facing the lower roller is provided with a plurality of lower nozzles in an array; the nozzles of the lower spray beam spray a large amount of emulsion to cool the lower roller, so as to prevent the lower roller from being abraded and cracked due to high temperature rise, and prolong the service life of the lower roller; since the large amount of emulsion sprayed by the nozzles of the lower spray beam automatically flows downward, a large amount of emulsion will not flow onto the copper strip, so that the squeeze roller does not need to be arranged at the lower roller.

[0012] Due to the adoption of the technical scheme as described above, the application has the following beneficial effects: the controllable cooling and lubricating device for the copper strip hot rolling mill disclosed in the application is provided with an upper spray beam between the upper balance hangers corresponding to both sides of the upper roller, the two ends of the upper spray beam are fixedly connected with the upper balance hangers, and the bottom of the upper spray beam is provided with a plurality of upper nozzles in an array; the upper roller is rotatably provided with a squeeze roller on both sides of the upper roller, and the outer periphery of the squeeze roller is in contact with the outer periphery of the upper roller; in the controllable cooling and lubricating device for the copper strip hot rolling mill, the nozzles of the upper spray beam spray a large amount of emulsion to cool the upper roller, so as to prevent the upper roller from being abraded and cracked due to high temperature rise, and prolong the service life of the upper roller; a large amount of emulsion is acted on by the squeeze roller in contact with the upper roller, and the excess emulsion is discharged from both ends of the upper roller, so that only a uniform and extremely thin emulsion film is left on the surface of the upper roller for lubrication between the roller and the copper strip, thereby reducing the abrasion of the upper roller and greatly reducing the rolling force, so as to solve the problem that a large amount of emulsion directly flows onto the copper strip, causing the temperature of the copper strip to rapidly decrease, and also alleviate the surface oxidation of the copper strip at high temperature, improve the surface quality and yield of the copper strip product; in addition, the upper spray beam fixedly arranged on the upper balance hanger will synchronously rise and fall with the upper roller, so as to solve the problems of plugging and unplugging of the emulsion pipeline and insufficient maintenance space when the upper roller is replaced; further, since the upper spray beam will synchronously rise and fall with the upper roller, the positional relationship between the upper spray beam and the upper roller is always maintained, so as to solve the problem of unstable cooling effect caused by the change of the positional relationship between the upper spray beam and the upper roller when the upper roller rises and falls. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 Axial view of the controllable cooling and lubricating device for the copper strip hot rolling mill;

[0014] Figure 2 Radial view of the controllable cooling and lubricating device for the copper strip hot rolling mill.

[0015] In the figure: 1, rolling mill housing; 2, upper roll bearing seat; 3, upper balance suspension rod; 4, upper jet beam; 4.1, upper nozzle; 5, water squeeze roller support arm; 6, support arm pin shaft; 7, water squeeze roller; 8, water baffle; 9, upper roll; 10, upper roll guide plate; 11, lower roll; 12, lower jet beam; 13, lower roll guide plate; 14, air cooling jet beam. DETAILED DESCRIPTION

[0016] The present application can be explained in detail by the following examples, the purpose of disclosing the present application is to protect all technical improvements within the scope of the present application.

[0017] A controllable cooling lubricating device of a copper strip hot rolling mill, the copper strip hot rolling mill comprises a rolling mill housing 1, an upper roll bearing seat 2, an upper balance suspension rod 3 and an upper roll 9; the upper roll bearing seat 2 is symmetrically provided with two upper roll bearing seats 2, which are movably arranged on the inner side surfaces of the two side columns of the rolling mill housing 1; two upper balance suspension rods 3 are arranged at each upper roll bearing seat 2, and the two upper balance suspension rods 3 are symmetrically arranged on the two sides of the upper roll bearing seat 2 and are fixedly connected with the upper roll bearing seat 2; the upper roll 9 is rotatably arranged between the upper roll bearing seats 2; the lower part of the upper roll 9 is movably provided with a lower roll 11; the upper jet beam 4 is arranged between the corresponding upper balance suspension rods 3 on the two sides of the upper roll 9, the two ends of the upper jet beam 4 are fixedly connected with the upper balance suspension rods 3, and the bottom of the upper jet beam 4 is arrayed with a plurality of upper nozzles 4.1; the water squeeze roller 7 is rotatably arranged on the upper part of the two sides of the upper roll 9, and the outer circumference of the water squeeze roller 7 is in contact with the outer circumference of the upper roll 9; the air cooling jet beam 14 is further arranged between the corresponding upper balance suspension rods 3 on the two sides of the upper roll 9, the two ends of the air cooling jet beam 14 are fixedly connected with the upper balance suspension rods 3, and the side of the air cooling jet beam 14 facing the upper roll 9 is arrayed with a plurality of air cooling nozzles; the water squeeze roller support arms 5 are connected with the water squeeze roller 7 through bearings at the two ends of the water squeeze roller 7, and the water squeeze roller support arms 5 are hingedly connected with the upper roll bearing seat 2 through the support arm pin shafts 6; the water baffle 8 is fixedly arranged between the water squeeze roller support arms 5 at the two ends of the water squeeze roller 7, and the water baffle 8 is in contact with the outer circumference of the water squeeze roller 7; the upper roll guide plates 10 are adjustably arranged on the lower part of the two sides of the upper roll 9, and the upper roll guide plates 10 are provided with gaps with the outer circumference of the upper roll 9;

[0018] The lower jet beam 12 is fixedly arranged on the two sides of the lower roll 11, the two ends of the lower jet beam 12 are fixedly connected with the two side columns of the rolling mill housing 1; the lower jet beam 12 is arrayed with a plurality of lower nozzles on the side facing the lower roll 11; the lower roll guide plates 13 are adjustably arranged on the upper part of the two sides of the lower roll 11, and the lower roll guide plates 13 are provided with gaps with the outer circumference of the lower roll 11.

[0019] The part not described in the present application is the prior art.

Claims

1. A controllable cooling and lubrication device for a copper strip hot rolling mill, the copper strip hot rolling mill comprising a mill stand (1), an upper roll bearing seat (2), an upper balance rod (3), and an upper roll (9); two upper roll bearing seats (2) are symmetrically arranged and are movably arranged on the inner side of the columns on both sides of the mill stand (1); two upper balance rods (3) are arranged at each upper roll bearing seat (2), the two upper balance rods (3) are symmetrically arranged on both sides of the upper roll bearing seat (2) and fixedly connected to the upper roll bearing seat (2); the upper roll (9) is rotatably arranged between the upper roll bearing seats (2); a lower roll (11) is movably arranged at the lower part of the upper roll (9); characterized in that: An upper spray beam (4) is provided between the upper balance rods (3) on both sides of the upper roll (9). The two ends of the upper spray beam (4) are fixedly connected to the upper balance rods (3). Several upper nozzles (4.1) are arranged in an array at the bottom of the upper spray beam (4). Water squeezing rollers (7) are rotatably provided on both sides of the upper part of the upper roll (9). The outer circumference of the water squeezing roller (7) is in contact with the outer circumference of the upper roll (9). Water squeezing roller support arms (5) are connected to both ends of the water squeezing roller (7) through bearings. The water squeezing roller support arms (5) are hinged to the upper roll bearing seat (2) through the support arm pin (6). A baffle plate (8) is fixedly provided between the water squeezing roller support arms (5) at both ends of the water squeezing roller (7) to block water. The plate (8) contacts the outer circumference of the squeezing roller (7); an air-cooled spray beam (14) is also provided between the corresponding upper balance rods (3) on both sides of the upper roller (9). The two ends of the air-cooled spray beam (14) are fixedly connected to the upper balance rods (3). Several air-cooled nozzles are arranged on the side of the air-cooled spray beam (14) facing the upper roller (9). Depending on the rotation direction of the upper roller (9), the air-cooled spray beams (14) on both sides of the upper roller (9) work in turn: when the upper roller (9) rotates clockwise, the air-cooled spray beam (14) on the left side of the upper roller (9) works; when the upper roller (9) rotates counterclockwise, the air-cooled spray beam (14) on the right side of the upper roller (9) works.

2. The controllable cooling and lubrication device for a copper strip hot rolling mill according to claim 1, characterized in that: Upper roller guide plates (10) are adjustable on both sides of the lower part of the upper roller (9), and there is a gap between the upper roller guide plates (10) and the outer circumference of the upper roller (9).

3. The controllable cooling and lubrication device for a copper strip hot rolling mill according to claim 1, characterized in that: Lower spray beams (12) are fixedly installed on both sides of the lower roll (11), and the two ends of the lower spray beams (12) are fixedly connected to the two side columns of the mill stand (1); several lower nozzles are arranged on the side of the lower spray beams (12) facing the lower roll (11).

4. The controllable cooling and lubrication device for copper strip hot rolling mill according to claim 3, characterized in that: The lower roll (11) has adjustable lower roll guide plates (13) on both sides of its upper part, and there is a gap between the lower roll guide plates (13) and the outer circumference of the lower roll (11).

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