CN212419170U

CN212419170U - Novel roller type straightening machine

Info

Publication number: CN212419170U
Application number: CN202020614618.8U
Authority: CN
Inventors: 姚养库; 刘睿平
Original assignee: China National Heavy Machinery Research Institute Co Ltd
Current assignee: China National Heavy Machinery Research Institute Co Ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2021-01-29
Anticipated expiration: 2030-04-22

Abstract

The utility model discloses a novel roller straightener, a pinch roll screwdown oil cylinder, a pinch roll, an upper straightening roll screwdown oil cylinder, an upper straightening roll and a lower straightening roll are all arranged on a frame, a plurality of upper straightening rolls are arranged on the upper end of the lower straightening roll, wherein the upper straightening roll screwdown oil cylinders are a plurality, wherein the upper straightening roll screwdown oil cylinders are arranged on the upper ends of the corresponding upper straightening rolls and connected, the pinch roll comprises an upper pinch roll and a lower pinch roll, wherein the upper pinch roll is arranged on the upper end of the lower pinch roll, the top height of the pinch roll and the top height of the lower straightening roll are in the same horizontal plane, the pinch roll screwdown oil cylinder is arranged on the top of the upper pinch roll and connected, a straightening roll transmission component is respectively connected with a plurality of upper straightening rolls and lower straightening roll systems, wherein the pinch roll transmission component is respectively connected with the upper pinch roll and the lower pinch roll, wherein the pinch roll pressing oil cylinder and the upper straightening roll pressing oil cylinders are respectively connected with the control assembly.

Description

Novel roller type straightening machine

Technical Field

The utility model belongs to the technical field of the straightener, 5 rollers, 7 rollers or 9 rollers of the section of opening a book of pickling continuous rolling unit, galvanizing unit or other similar units of concretely relates to steel field cold rolling mill use, especially relate to a novel roll-type straightener.

Background

In the uncoiling section of a continuous rolling unit, a galvanizing unit or other similar units in a cold rolling mill in the field of steel, a roll straightening machine (in the form of 3 rolls, 5 rolls, 7 rolls or 9 rolls) is usually arranged for straightening the head of a raw strip steel or continuously straightening the strip steel, so that the shape of the raw strip is improved and the raw strip can conveniently enter the subsequent processes. Under the condition of the prior art, if the overlapping amount of the straightening machine is adjusted by the lifting of the upper straightening roll, the upper straightening roll can be lifted only by mutually guiding the upper straightening roll and the bearing seat when lifted. In addition, the frame of the straightening machine under the prior art is generally an open frame or a two-piece frame.

Under the prior art condition, the problems of the straightening machine are as follows: 1) the bearing seat is adopted for guiding, the stress is not good, and the bearing and the working roll are often damaged; 2) the upper working rolls cannot be independently replaced, and when one upper working roll is replaced, all the upper working rolls must be completely detached; 3) when the upper working roll is replaced, the assembly workload is large; 4) the rigidity of the open type frame or the two-piece type frame is poor, the deformation of the frame is large, and the straightening quality is influenced; 5) when the working speed is higher than 300 m/min, faults occur frequently; 6) and a motor is adopted to drive the worm gear speed reducer to press down, so that overload protection and high-frequency vibration impact cannot be realized, and the worm gear speed reducer is frequently damaged. The utility model discloses above-mentioned shortcoming can be solved to the technique, market demand is satisfied.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide a novel roll straightening machine and aligning method, overcome prior art in 1: the bearing seat is adopted for guiding, the stress is not good, and the bearing and the working roll are often damaged; 2: the upper working rolls cannot be independently replaced, and when one upper working roll is replaced, all the upper working rolls must be completely detached; 3: when the upper working roll is replaced, the assembly workload is large; 4: the rigidity of the open type frame or the two-piece type frame is poor, the deformation of the frame is large, and the straightening quality is influenced; 5: when the working speed is higher than 300 m/min, faults occur frequently; 6: and a motor is adopted to drive the worm gear speed reducer to press down, so that overload protection and high-frequency vibration impact cannot be realized, and the worm gear speed reducer is frequently damaged.

In order to solve the technical problem, the technical scheme of the utility model is that: a novel roller straightener comprises a pinch roll pressing oil cylinder, a rack, pinch rolls, an upper straightening roll pressing oil cylinder, upper straightening rolls, a lower straightening roll system, a straightening roll transmission assembly, a pinch roll transmission assembly and a control assembly, wherein the pinch roll pressing oil cylinder, the pinch rolls, the upper straightening roll pressing oil cylinder, the upper straightening rolls and the lower straightening roll system are all arranged on the rack, the number of the upper straightening rolls is multiple, the upper straightening rolls are arranged at the upper end of the lower straightening roll system, the number of the upper straightening roll pressing oil cylinders is multiple, the upper straightening roll pressing oil cylinders are arranged at the upper ends of the corresponding upper straightening rolls and connected, the axes of the pinch rolls are parallel to the axes of the lower straightening roll system, the pinch rolls comprise upper pinch rolls and lower pinch rolls, the upper pinch rolls are arranged at the upper ends of the pinch rolls, the top heights of lower pinch rolls and the top heights of the lower pinch rolls are in the same horizontal plane, the pinch roll pressing oil cylinder is arranged at the top of the pinch roll upper roll and connected with the top of the pinch roll upper roll, the straightening roll transmission assembly is respectively connected with a plurality of upper straightening rolls and a plurality of lower straightening roll systems, the pinch roll transmission assembly is respectively connected with the pinch roll upper roll and the pinch roll lower roll, and the pinch roll pressing oil cylinder and the upper straightening roll pressing oil cylinders are respectively connected with the control assembly.

Preferably, the machine frame comprises a connecting plate, an operation side housing, a base, a first cross beam, a second cross beam, a third cross beam, a fourth cross beam, a transmission side housing, a pinch roll guide window, a lower straightening roll system installation window, an upper straightening roll independent guide window, a pinch roll pressing oil cylinder installation hole and an upper straightening roll pressing oil cylinder installation hole, wherein the operation side housing and the transmission side housing are relatively fixed on the base through bolts, the base is installed on an equipment base, the first cross beam, the second cross beam, the third cross beam and the fourth cross beam respectively connect the side surfaces of the operation side housing and the transmission side housing from top to bottom through bolts and positioning pins, the connecting plate connects the top of the operation side housing and the top of the transmission side housing through bolts and positioning pins, the pinch roll guide window is arranged between the operation side housing and the transmission side housing and is used for installing an upper pinch roll and a lower pinch roll, the pinch roll system installation window is arranged between the operation side housing window and the transmission side housing window, the lower straightening roll system installation window is arranged in parallel with the pinch roll system installation window, the lower straightening roll system installation window is used for installing a lower straightening roll system, the upper straightening roll system independent guide window is arranged at the top of the lower straightening roll system installation window, the upper straightening roll independent guide window is used for installing an upper straightening roll, the pinch roll pressing oil cylinder installation hole is arranged at the top of the pinch roll system guide window, the pinch roll pressing oil cylinder installation hole is used for installing a pinch roll pressing oil cylinder, the upper straightening roll pressing oil cylinder installation hole is arranged at the top of the upper straightening roll independent guide window, the upper straightening roll pressing oil cylinder installation hole is used for installing an upper straightening roll pressing oil cylinder, and the pinch roll system installation window, the lower straightening roll system installation window and the pinch roll system installation window are in an 8-shaped structure, And the operating side and the transmission side of the independent guide window of the upper straightening roll are both provided with pressing plates for preventing the pinch roll or the straightening roll from axially moving in a serial manner.

Preferably, the thickness of the steel plate of the operation side housing window and the thickness of the steel plate of the transmission side housing window are 50-150 mm, the operation side housing window and the transmission side housing window can be formed by machining a whole steel plate or integrally casting, the third cross beam is arranged at the position of the independent guide window of the upper straightening roll and used for improving the rigidity and the strength of the independent guide window of the upper straightening roll, and the fourth cross beam is arranged at the bottom of the installation window of the lower straightening roll system and used for providing support for the installation window of the lower straightening roll system.

Preferably, the lower end of the pinch roll pressing oil cylinder is in a flange installation mode and is fixed in a mounting hole of the pinch roll pressing oil cylinder through a bolt, the lower end of the pinch roll pressing oil cylinder is connected with a pinch roll oil cylinder connector through threads, the bottom of the pinch roll oil cylinder connector is connected with the top of a transition connector through a pin shaft, the bottom of the transition connector is connected with bearing seats on two sides of the pinch roll upper roller through bolts, two sides of the bearing seat of the pinch roll upper roller and the upper part of a pinch roll guide window form a sliding pair in clearance fit, a lower pinch roll is installed on the lower part of the pinch roll guide window, two sides of the bearing seat of the pinch roll lower roll and the lower part of the pinch roll guide window form a sliding pair in clearance fit, pinch roll pressing plates are arranged on an operation side and a transmission side of the pinch roll guide window, and the pinch roll pressing plates are, as the pinch roll presses the stretching and retracting of the oil cylinder, the upper pinch roll will rise or fall.

Preferably, the lower end of the upper straightening roll screwdown cylinder is in a flange mounting mode and is fixed in an upper straightening roll screwdown cylinder mounting hole through a bolt, wherein the lower end of the upper straightening roll screwdown cylinder is connected with an upper straightening roll screwdown cylinder joint penetrating through a graphite sliding sleeve, the graphite sliding sleeve is fixed in a rack through a bolt, one end of the upper straightening roll screwdown cylinder joint penetrates through an inner hole of the graphite sliding sleeve and forms a sliding pair in clearance fit with the inner hole, the sliding pair is connected with the lower end of the upper straightening roll screwdown cylinder in the rack through a thread, the other end of the upper straightening roll screwdown cylinder joint is connected with a bearing seat of the upper straightening roll through a pressing block, the pressing block is fixed on the bearing seat of the upper straightening roll through a bolt, the graphite sliding sleeve, the upper straightening roll screwdown cylinder joint, the pressing block and the upper straightening roll are arranged in an upper straightening roll independent guide window, and the upper straightening roll consists of an upper straightening roll working roll and two, the two upper straightening roll bearing seats are respectively arranged on the operation side and the transmission side of the upper straightening roll working roll, wherein the two sides of the upper straightening roll bearing seats and the independent guide window of the upper straightening roll form clearance fit sliding pairs, the two sides of the independent guide window of the upper straightening roll are provided with upper straightening roll pressing plates, the upper straightening roll pressing plates are fixed on the rack through bolts and used for restraining the axial serial movement of the upper straightening roll, and the upper straightening roll pressing oil cylinder can drive the upper straightening roll to independently ascend or descend in the independent guide window of the upper straightening roll so as to adjust the overlapping amount required by straightening.

Preferably, the lower straightening roll system is integrally installed in an installation window of the lower straightening roll system, wherein the lower straightening roll system comprises a lower straightening roll system working roll and two groups of lower straightening roll system bearing seats, the two groups of lower straightening roll system bearing seats are respectively arranged on the operation side and the transmission side of the lower straightening roll system working roll, two sides of the lower straightening roll system bearing seats and the installation window of the lower straightening roll system form a sliding pair in clearance fit, two sides of the installation window of the lower straightening roll system are provided with lower straightening roll system pressing plates, the lower straightening roll system pressing plates are fixed on a rack through bolts and used for restraining axial movement of the lower straightening roll system, the lower straightening roll system is not lifted integrally, and the lower straightening roll system bearing seats are of an integral structure.

Preferably, the straightening roller transmission assembly comprises a variable frequency motor, a speed reducer, a gear distribution box and a universal coupling, wherein the variable frequency motor is connected with the speed reducer through the coupling, the speed reducer is connected with the gear distribution box through the coupling, and the gear distribution box is connected with the upper straightening rollers and the lower straightening rollers through the universal coupling respectively; the pinch roll transmission assembly comprises a pinch roll transmission variable frequency motor, a pinch roll speed reducer and a pinch roll universal coupler, wherein the pinch roll transmission variable frequency motor is connected with the pinch roll speed reducer through a coupler, and the pinch roll speed reducer is connected with the pinch roll upper roll and the pinch roll lower roll through the pinch roll universal coupler respectively.

Preferably, the control assembly comprises a servo valve, a pressure sensor, a displacement sensor and a controller, wherein an upper straightening roller pressing oil cylinder is arranged above the transmission side and the operation side of each upper straightening roller, the upper straightening roller pressing oil cylinders are connected with the servo valve through pipelines, the servo valve is connected with the controller through cables, the pressure sensors are arranged on oil inlet pipelines of rodless cavities of the upper straightening roller pressing oil cylinders and used for measuring the pressure of the rodless cavities, the displacement sensors are arranged in the pressure sensors and used for accurately measuring the extending amount of the oil cylinders, and the controller is a single chip microcomputer.

Compared with the prior art, the utility model has the advantages of:

(1) each upper straightening roller of the straightening machine of the utility model is provided with an independent guide window, namely, the independent guide window of the upper straightening roller, the upper straightening roller can drive the upper straightening roller to independently ascend or descend in the independent guide window of the upper straightening roller by pressing down the oil cylinder, so as to adjust the overlapping amount required by straightening, the ascending and descending do not need the bearing seat guide of the upper straightening roller, thereby realizing the real independent adjustment, ensuring that the ascending and descending of each upper straightening roller are not influenced by other upper straightening rollers, increasing the use flexibility of the straightening machine and reducing the maintenance workload; meanwhile, the straightening roller bearing seat is well stressed, and the upper straightening roller is fixed on the rack through the upper straightening roller pressing plate to restrain the axial serial movement of the upper straightening roller, so that the axial serial movement is less;

(2) when a certain upper straightening roller fails and cannot work, the upper straightening roller is operated by the control assembly to be in an open state, other upper straightening rollers work normally and are not influenced, when the certain upper straightening roller needs to be replaced, the upper straightening roller is lowered onto the lower straightening roller system by the control assembly, then the upper straightening roller and the lower straightening roller system are pulled out of the wire together, a new upper straightening roller is placed in the corresponding position of the lower straightening roller system and pushed into the frame of the straightening machine, other upper straightening rollers do not need to be disassembled in the process, the working efficiency is improved, and the workload is reduced;

(3) the utility model discloses straightening machine department adopts closed frame, and the side of operation side memorial archway and transmission side memorial archway is connected through the crossbeam, and the top is connected through the connecting plate, connects and constitutes complete frame, and the steel sheet thickness of operation side memorial archway and transmission side memorial archway is 50 ~ 150mm, can adopt monoblock steel sheet processing to form or whole casting processing to form, the utility model discloses the frame rigidity is good, and the precision is high, and the deflection is little, can obviously improve the straightening quality;

(4) the utility model discloses an operation side and the transmission side of each upper straightening roller all have the design and go up straightening roller and push down hydro-cylinder, servo valve, displacement sensor and pressure sensor for accurate independent control its decrement and straightening pressure closed-loop control, the utility model discloses it pushes down oil inlet pipe in hydro-cylinder rodless chamber and designs on the road and has pressure sensor can realize straightening pressure closed-loop control and overload protection to avoid causing equipment damage because of transshipping, adopt the control assembly to realize the adjustment of decrement simultaneously, can adapt to equipment high-speed operation on the one hand, on the other hand realizes overload protection;

(5) the utility model discloses simple structure, convenient to use, control effectual, the practicality is strong, the combined cost is low, operation process safe and reliable, and the highest operating speed can reach 500 meters/minute.

Drawings

FIG. 1 is a schematic view of a main structure of a novel roller leveler according to the present invention;

FIG. 2 is a schematic diagram of a right side top view structure of the novel roller leveler of the present invention;

FIG. 3 is a schematic diagram of the control of the upper straightening roll pressing cylinder of the novel roll straightening machine of the present invention;

FIG. 4 is a view of the present invention from the direction A of FIG. 1;

FIG. 5 is a schematic view of the frame structure of the novel roller leveler of the present invention;

FIG. 6 is a K-direction view of FIG. 5 of the present invention;

FIG. 7 is a schematic structural view of an upper straightening roll of the novel roll straightening machine of the present invention;

FIG. 8 is a schematic structural view of a lower straightening roll system of the novel roll straightening machine of the present invention;

FIG. 9 is a schematic diagram of the calibration of the upper straightening roll and the lower straightening roll of the novel roll straightening machine of the present invention.

Description of the reference numerals

1-a pinch roll press cylinder, 2-a rack, 3-a pinch roll cylinder joint, 4-a transition joint, 5-a pinch roll upper roll, 6-a pinch roll lower roll, 7-an upper straightening roll press cylinder, 8-a graphite sliding sleeve, 9-an upper straightening roll press cylinder joint, 10-a pressing block, 11-an upper straightening roll, 12-a lower straightening roll system, 13-a straightening roll transmission assembly, 14-a pinch roll transmission assembly, 15-a pinch roll pressing plate, 16-an upper straightening roll pressing plate, 17-a lower straightening roll system pressing plate, 18-a calibration plate, 19-a servo valve, 20-a pressure sensor, 21-a displacement sensor and 22-a controller;

2-1-connecting plate, 2-2-operating side housing, 2-3-base, 2-4-first beam, 2-5-second beam, 2-6-third beam, 2-7-fourth beam, 2-8-driving side housing, 2-9-pinch roll guide window, 2-10-lower straightening roll system installation window, 2-11-upper straightening roll independent guide window, 2-12-pinch roll pressing cylinder installation hole, and 2-13-upper straightening roll pressing cylinder installation hole;

11-1-upper straightening roll working roll, 11-2-upper straightening roll bearing seat;

12-1-lower straightening roll is a working roll, and 12-2-lower straightening roll is a bearing seat;

13-1-variable frequency motor, 13-2-speed reducer, 13-3-gear distribution box and 13-4-universal coupling;

14-1-pinch roll transmission variable frequency motor, 14-2-pinch roll speed reducer and 14-3-pinch roll universal coupling.

Detailed Description

The following description of the embodiments of the present invention is provided in connection with the following embodiments:

it should be noted that the structures, ratios, sizes, etc. illustrated in the present specification are only used to cooperate with the contents disclosed in the specification for the understanding and reading of the people skilled in the art, and are not used to limit the limit conditions that the present invention can be implemented, and any modifications of the structures, changes of the ratio relationships or adjustments of the sizes should still fall within the scope that the technical contents disclosed in the present invention can cover without affecting the functions and the achievable purposes of the present invention.

Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Example 1

As shown in fig. 1 and 2, the utility model discloses a novel roller straightener, which comprises a pinch roll press-down oil cylinder 1, a frame 2, pinch rolls, an upper straightening roll press-down oil cylinder 7, an upper straightening roll 11, a lower straightening roll system 12, a straightening roll transmission assembly 13, a pinch roll transmission assembly 14 and a control assembly, wherein the pinch roll press-down oil cylinder 1, the pinch rolls, the upper straightening roll press-down oil cylinder 7, the upper straightening roll 11 and the lower straightening roll system 12 are all arranged on the frame 2, the upper straightening rolls 11 are multiple, wherein the upper straightening rolls 11 are arranged at the upper ends of the lower straightening roll system 12, the upper straightening roll press-down oil cylinders 7 are multiple, the upper straightening roll press-down oil cylinders 7 are arranged at the upper ends of the corresponding upper straightening rolls 11 and connected, the axes of the pinch rolls are parallel to the axes of the lower straightening roll system 12, wherein the pinch rolls comprise upper pinch rolls 5 and lower pinch rolls 6, the upper pinch rolls 5 are arranged at the upper ends of the lower rolls 6, the top height of the lower pinch roll roller 6 and the top height of the lower straightening roll system 12 are located on the same horizontal plane, the pinch roll pressing oil cylinder 1 is arranged at the top of the upper pinch roll roller 5 and connected with the top of the upper pinch roll roller, the straightening roll transmission assembly 13 is respectively connected with the upper straightening rolls 11 and the lower straightening roll system 12, the pinch roll transmission assembly 14 is respectively connected with the upper pinch roll roller 5 and the lower pinch roll roller 6, and the pinch roll pressing oil cylinder 1 and the upper straightening roll pressing oil cylinders 7 are respectively connected with the control assembly.

Example 2

Preferably, as shown in fig. 5 and 6, the rack 2 comprises a connecting plate 2-1, an operation side housing 2-2, a base 2-3, a first beam 2-4, a second beam 2-5, a third beam 2-6, a fourth beam 2-7, a transmission side housing 2-8, a pinch roll guide window 2-9, a lower straightening roll system installation window 2-10, an upper straightening roll independent guide window 2-11, a pinch roll pressing oil cylinder installation hole 2-12 and an upper straightening roll pressing oil cylinder installation hole 2-13, wherein the operation side housing 2-2 and the transmission side housing 2-8 are relatively fixed on the base 2-3 through bolts, the base 2-3 is installed on an equipment base, and the first beam 2-4, the second beam 2-5, the second beam 2-3, the first beam 2-4, the second beam 2-3, the third beam 2-6 and the fourth beam 2-7 are respectively connected with the side surfaces of the operation side housing 2-2 and the transmission side housing 2-8 from top to bottom by bolts and positioning pins, wherein the connecting plate 2-1 is used for connecting the top of the operation side housing 2-2 and the transmission side housing 2-8 by bolts and positioning pins, the pinch roller guide window 2-9 is arranged between the operation side housing 2-2 and the transmission side housing 2-8 and is used for installing the upper pinch roller 5 and the lower pinch roller 6, the pinch roller guide window 2-9 is in an 8-shaped structure, the lower straightening roller system installation window 2-10 is arranged between the operation side housing 2-2 and the transmission side housing 2-8, and the lower straightening roller system installation window 2-10 is arranged in parallel to the pinch roller guide window 2-9, wherein the lower straightening roll system installation window 2-10 is used for installing a lower straightening roll system 12, the upper straightening roll independent guide window 2-11 is arranged at the top of the lower straightening roll system installation window 2-10, the upper straightening roll independent guide window 2-11 is used for installing an upper straightening roll 11, the pinch roll screwdown oil cylinder installation hole 2-12 is arranged at the top of the pinch roll guide window 2-9, the pinch roll screwdown oil cylinder installation hole 2-12 is used for installing a pinch roll screwdown oil cylinder 1, the upper straightening roll screwdown oil cylinder installation hole 2-13 is arranged at the top of the upper straightening roll independent guide window 2-11, the upper straightening roll screwdown oil cylinder installation hole 2-13 is used for installing an upper straightening roll screwdown oil cylinder 7, the pinch roll guide window 2-9 and the lower straightening roll system installation window 2-10, The operation side and the transmission side of the upper straightening roll independent guide windows 2-11 are both provided with pressing plates for preventing the pinch rolls or the straightening rolls from axially moving in a serial way.

Example 3

Preferably, as shown in fig. 5 and 6, the thickness of the steel plate of the operation side housing 2-2 and the transmission side housing 2-8 is 50-150 mm, and the operation side housing 2-2 and the transmission side housing 2-8 can be formed by processing a whole steel plate or by casting and processing the whole steel plate, the third cross beam 2-6 is arranged at the position of the upper straightening roll independent guide window 2-11 and used for improving the rigidity and the strength of the upper straightening roll independent guide window 2-11, and the fourth cross beam 2-7 is arranged at the bottom of the lower straightening roll system installation window 2-10 and used for providing support for the lower straightening roll system installation window 2-10.

Example 4

Preferably, as shown in fig. 1 and 5, the lower end of the pinch roll press-down oil cylinder 1 is in a flange installation form and is fixed in a pinch roll press-down oil cylinder installation hole 2-12 through a bolt, wherein the lower end of the pinch roll press-down oil cylinder 1 is connected with a pinch roll oil cylinder connector 3 through a thread, the bottom of the pinch roll oil cylinder connector 3 is connected with the top of a transition connector 4 through a pin shaft, the bottom of the transition connector 4 is connected with bearing seats on two sides of the pinch roll upper roll 5 through a bolt, wherein two sides of the bearing seats of the pinch roll upper roll 5 and the upper part of a pinch roll guide window 2-9 form a sliding pair in clearance fit, the pinch roll lower roll 6 is installed on the lower part of the pinch roll guide window 2-9, wherein two sides of the bearing seats of the pinch roll lower roll 6 and the lower part of the pinch roll guide window 2-9 form a sliding pair in, the pinch roll pressing plate 15 is fixed on the rack 2 through bolts and used for restraining axial movement of the pinch roll upper roll 5 and the pinch roll lower roll 6, and the pinch roll upper roll 5 rises or falls along with extension and retraction of the pinch roll pressing oil cylinder 1.

Example 5

Preferably, as shown in fig. 1, 5 and 7, the lower end of the upper straightening roll screw-down cylinder 7 is in a flange mounting mode and is fixed in an upper straightening roll screw-down cylinder mounting hole 2-13 through a bolt, wherein the lower end of the upper straightening roll screw-down cylinder 7 is connected with an upper straightening roll screw-down cylinder joint 9 penetrating through a graphite sliding sleeve 8, wherein the graphite sliding sleeve 8 is fixed in the frame 2 through a bolt, one end of the upper straightening roll screw-down cylinder joint 9 penetrates through an inner hole of the graphite sliding sleeve 8 and forms a sliding pair in clearance fit with the inner hole, and is connected with the lower end of the upper straightening roll screw-down cylinder 7 through a thread in the frame 2, wherein the other end of the upper straightening roll screw-down cylinder joint 9 is connected with a bearing seat of an upper straightening roll 11 through a pressing block 10, wherein the pressing block 10 is fixed on the bearing seat of the upper straightening roll 11 through a bolt, and the graphite sliding sleeve 8, The pressing block 10 and the upper straightening roll 11 are arranged inside an upper straightening roll independent guide window 2-11, the upper straightening roll 11 consists of an upper straightening roll working roll 11-1 and two upper straightening roll bearing seats 11-2, wherein the two upper straightening roll bearing seats 11-2 are respectively arranged on the operating side and the transmission side of the upper straightening roll working roll 11-1, the two sides of the upper straightening roll bearing seat 11-2 and the upper straightening roll independent guide window 2-11 form a clearance fit sliding pair, the two sides of the upper straightening roll independent guide window 2-11 are provided with upper straightening roll pressing plates 16, the upper straightening roll pressing plates 16 are fixed on the frame 2 through bolts and used for restraining the axial serial movement of the upper straightening roll 11, the upper straightening roll pressing oil cylinder 7 can drive the upper straightening roll 11 to independently ascend or descend in the upper straightening roll independent guide window 2-11, thereby adjusting the amount of overlap required for straightening.

Example 6

Preferably, as shown in FIGS. 1, 5 and 8, the lower straightening roll system 12 is integrally installed in the lower straightening roll system installation windows 2 to 10, wherein the lower straightening roll system 12 comprises a lower straightening roll system working roll 12-1 and two groups of lower straightening roll system bearing blocks 12-2, wherein, two groups of lower straightening roll system bearing blocks 12-2 are respectively arranged on the operation side and the transmission side of the lower straightening roll system working roll 12-1, wherein, the two sides of the bearing seat 12-2 of the lower straightening roll system and the mounting window 2-10 of the lower straightening roll system form a sliding pair in clearance fit, the two sides of the lower straightening roll system installation window 2-10 are provided with lower straightening roll system press plates 17, wherein the lower straightening roll system pressure plate 17 is fixed on the frame 2 through a bolt and is used for restricting the axial movement of the lower straightening roll system 12, the lower straightening roll system 12 does not lift integrally, wherein the lower straightening roll system bearing seat 12-2 is of an integral structure.

Example 7

Preferably, as shown in fig. 2 and 4, the straightening roll transmission assembly 13 comprises a variable frequency motor 13-1, a speed reducer 13-2, a gear distribution box 13-3 and a universal coupling 13-4, wherein the variable frequency motor 13-1 is connected with the speed reducer 13-2 through a coupling, the speed reducer 13-2 is connected with the gear distribution box 13-3 through a coupling, and the gear distribution box 13-3 is connected with the plurality of upper straightening rolls 11 and the lower straightening roll system 12 through the universal coupling 13-4 respectively; the pinch roll transmission assembly 14 comprises a pinch roll transmission variable frequency motor 14-1, a pinch roll speed reducer 14-2 and a pinch roll universal coupling 14-3, wherein the pinch roll transmission variable frequency motor 14-1 is connected with the pinch roll speed reducer 14-2 through a coupling, and the pinch roll speed reducer 14-2 is connected with the pinch roll upper roll 5 and the pinch roll lower roll 6 through the pinch roll universal coupling 14-3 respectively.

Preferably, as shown in fig. 3, the control assembly includes a servo valve 19, a pressure sensor 20, a displacement sensor 21 and a controller 22, wherein an upper straightening roller depressing cylinder 7 is disposed above the transmission side and the operation side of each upper straightening roller 11, the upper straightening roller depressing cylinder 7 is connected to the servo valve 19 through a pipeline, the servo valve 19 is connected to the controller 22 through a cable, the pressure sensor 20 is disposed on an oil inlet pipeline of a rodless cavity of the upper straightening roller depressing cylinder 7 for measuring the pressure of the rodless cavity, the displacement sensor 21 is disposed in the upper straightening roller depressing cylinder 7 for accurately measuring the extending amount of the cylinder, and the controller 22 is a single chip microcomputer.

Example 8

Preferably, the straightening method of the novel roller straightening machine comprises the following steps:

step 1) carrying out zero position state calibration on an upper straightening roll 11 and a lower straightening roll system 12, setting an open state value, an open roll gap state value and a closed roll gap state value, and simultaneously setting a protective pressure value;

step 2) pressing the upper roll 5 of the pinch roll to press the head of the strip steel, rotationally dragging the strip steel to be sent into the frame 2, enabling the upper straightening roll 11 and the lower straightening roll system 12 to enter a 'closed roll gap' state, then enabling the strip steel to be straightened to enter a straightening machine for straightening, continuously adjusting by a control assembly in the straightening process to enable the variation of the overlapping amount to be not more than 0.05mm, simultaneously measuring a pressure measurement value in a rodless cavity of a pressing oil cylinder 7 of the upper straightening roll by the control assembly in real time, and obtaining the straightening pressure of the upper straightening roll 11 by the sum of pressure measurement values of the transmission side and the operation side of the same upper straightening roll 11;

step 3) when the straightening pressure is greater than the set protection pressure value, rapidly entering a 'roll gap opening' state, and alarming to remind a worker to check whether the straightened strip steel exceeds the range;

step 4) when one upper straightening roller 11 fails and cannot work, the upper straightening roller is in an open state by controlling the operation of the assembly, and other upper straightening rollers 11 work normally and are not influenced;

and 5) when one upper straightening roller 11 needs to be replaced, the upper straightening roller 11 is lowered onto the lower straightening roller system 12 through the operation of the control assembly, then the upper straightening roller and the lower straightening roller system 12 are pulled out of the wire, and a new upper straightening roller 11 is placed at the corresponding position of the lower straightening roller system 12 and pushed into the straightening machine frame 2.

Preferably, as shown in fig. 9, the calibration method of the "zero position" state in step 1) is to place the calibration plate 18 between the upper straightening roll 11 and the lower straightening roll system 12, operate the upper straightening roll to press the piston rod of the oil cylinder 7 to extend through the control assembly, lower the upper straightening roll 11, make the upper straightening roll 11 contact with the upper surface of the calibration plate 18, confirm that the operating side and the transmission side of the upper straightening roll 11 both contact with the calibration plate 18 without a gap, read and record the measured value from the control assembly, the measured value plus the thickness value of the calibration plate 18 is the zero position state, make the control assembly record the position, and use the position as the reference for controlling the adjustment of the overlapping amount of the upper straightening roll 11 and the lower straightening roll system 12, the upper straightening roll presses the piston rod of the oil cylinder 7 to extend in the "zero position" state, but the overlapping amount of the upper straightening roll 11 and the lower straightening roll system 12 is zero;

setting an 'open' state value, namely, the upper straightening rollers 11 rise to the highest position, and at the moment, each upper straightening roller presses down the piston rod of the oil cylinder 7 to be completely retracted;

setting a 'roll gap opening' state value, namely setting a required 'roll gap opening' value in a control assembly, and enabling the control assembly to record the value, wherein the 'roll gap opening' state is 2mm to 3mm larger than the maximum thickness of the straightening strip steel of the straightening machine, and at the moment, a piston rod of a pressing oil cylinder 7 of an upper straightening roll also extends out;

setting a 'closed roll gap' state value, namely overlapping quantity is generated when the upper straightening roll 11 and the lower straightening roll system 12 are overlapped with each other, setting the overlapping quantity required by the process in the control assembly, enabling the control assembly to record the value, and adjusting the overlapping quantity in real time according to the requirement;

and setting a protection pressure value, and setting the protection pressure value in the control assembly, namely adjusting the straightening machine to enter a roll gap opening state when the straightening pressure is greater than the protection pressure value.

The working state of the straightening roll of the utility model has the following several types:

1 "open" condition, i.e. the upper straightening rollers 11 are raised to the uppermost position, at which time the piston rod of each upper straightening roller depressing cylinder 7 is fully retracted.

And 2, a zero position state, namely, confirming the zero position of each upper straightening roller and taking the zero position as a reference for adjustment, wherein in the zero position state, the piston rod of the upper straightening roller pressing oil cylinder 7 extends out for a certain length, but the overlapping amount of the upper straightening roller 11 and the lower straightening roller system 12 is zero.

3, opening a roll gap, namely the roll gap reaches a set roll gap value which is 2mm to 3mm larger than the maximum thickness of the steel plate straightened by the straightening machine; at the moment, the piston rod of the upper straightening roll pressing oil cylinder 7 also extends out for a certain length.

4 "closed roll gap", that is, the roll gap disappears, the upper straightening roll 11 and the lower straightening roll 12 overlap each other to produce a lap amount, and the lap amount is set from the controller 22.

The utility model discloses the straightening roller is first when working make following preparation work earlier:

1. the method for calibrating the zero state of the system comprises the following steps: the calibration plate 18 is placed between the upper straightening roll 11 and the lower straightening roll system 12 (see fig. 9), the upper straightening roll is operated to press down the piston rod of the oil cylinder 7 to extend out, the upper straightening roll 11 descends, the upper straightening roll working roll 11-1 in the upper straightening roll 11 is contacted with the upper surface of the calibration plate 18, the operation side and the transmission side of the upper straightening roll 11 are confirmed to be contacted with the calibration plate 18 without gaps, the measured value of the displacement sensor 21 is read and recorded from the controller 22, the measured value plus the thickness value of the calibration plate 18 is a zero position, and the controller 22 records the position and is used as a reference for controlling the adjustment of the overlapping amount.

2. The "open nip" state value is set, the desired "open nip" value is set in the controller, and the controller 22 is caused to record this value.

3. The overlap value of the 'closed roll gap' state is set, the overlap required by the process is set in the controller 22, and the controller 22 records the value, and the overlap can be adjusted in real time within a certain range according to the requirement.

4. A protective pressure value is set, and the protective pressure value is set in the controller 22, namely, when the measured value of the pressure sensor 20 is more than the protective pressure value, the straightening machine is in a roll gap opening state.

The working principle of the utility model is as follows:

as shown in figure 1, firstly, the upper pinch roll roller 5 presses down to press the head of the strip steel, and rotationally drags and sends the strip steel into a rack 2 of a straightening machine, the roll gap value of each upper straightening roll 11 is set in advance according to the process requirements, the strip steel enters a closed roll gap state, then the strip steel to be straightened enters the straightening machine to be straightened, in the straightening process, a controller 22 continuously adjusts the opening degree of a servo valve 19, the variation of the overlapping quantity does not exceed 0.05mm, meanwhile, a pressure sensor 20 measures the pressure measured value in a rodless cavity of an upper straightening roll pressing oil cylinder 7 in real time, and the sum of the measured values of the transmission side of the upper straightening roll 11 and an operation side pressure sensor 20 is the straightening pressure of the upper straightening roll 11.

When the straightening pressure is greater than the set protection pressure value, the straightening machine rapidly enters a 'roll gap opening' state, and an alarm is given to remind a worker to check whether the straightened steel plate exceeds the range, so that the equipment is further protected from being damaged.

When one upper straightening roller 11 fails and cannot work, the operation is in an open state, and other upper straightening rollers 11 work normally and are not influenced.

When a certain upper straightening roll 11 needs to be replaced, the upper straightening roll is operated to descend onto the lower straightening roll system 12, then the upper straightening roll and the lower straightening roll system 12 are pulled out of the wire together, a new upper straightening roll 11 is placed at the corresponding position of the lower straightening roll system 12 and pushed into a frame of the straightening machine, other upper straightening rolls do not need to be disassembled in the process, the working efficiency is improved, and the working amount is reduced.

Each upper straightening roller of the straightening machine of the utility model is provided with an independent guide window, namely, the independent guide window of the upper straightening roller, the upper straightening roller can drive the upper straightening roller to independently ascend or descend in the independent guide window of the upper straightening roller by pressing down the oil cylinder, so as to adjust the overlapping amount required by straightening, the ascending and descending do not need the bearing seat guide of the upper straightening roller, thereby realizing the real independent adjustment, ensuring that the ascending and descending of each upper straightening roller are not influenced by other upper straightening rollers, increasing the use flexibility of the straightening machine and reducing the maintenance workload; meanwhile, the straightening roller bearing seat is well stressed, and the upper straightening roller pressing plate is fixed on the rack to restrain the axial serial movement of the upper straightening roller, so that the axial serial movement is less.

The utility model discloses when certain upper straightening roller breaks down and can not the during operation, it is in "open" state through control assembly operation, other upper straightening rollers normally work, and not influenced, when needs change a certain upper straightening roller, through control assembly operation messenger upper straightening roller fall down straightening roller system, then with its with lower straightening roller system together pull out the line outside, put the new upper straightening roller in lower straightening roller system corresponding position pushes away into the straightening machine frame, other upper straightening rollers need not be disassembled to this process, and the work efficiency is improved, and the work load is reduced.

The utility model discloses straightening machine department adopts closed frame, and the side of operation side memorial archway and transmission side memorial archway passes through the crossbeam to be connected, and the top is passed through the connecting plate and is connected, connects to form complete frame, and the steel sheet thickness of operation side memorial archway and transmission side memorial archway is 50 ~ 150mm, can adopt monoblock steel sheet processing to form or whole casting processing forms, the utility model discloses the frame rigidity is good, and the precision is high, and the deflection is little, can obviously improve the aligning quality.

The utility model discloses an operation side and the transmission side of straightening roller all have to design in each and go up straightening roller and push down hydro-cylinder, servo valve, displacement sensor and pressure sensor for its decrement of accurate independent control and aligning pressure closed-loop control, the utility model discloses it has pressure sensor to realize aligning pressure closed-loop control and overload protection to go up straightening roller and push down the oil pipe design on the oil pipe way in hydro-cylinder rodless chamber to avoid causing equipment impaired owing to transship, adopt the control assembly to realize the adjustment of decrement simultaneously, can adapt to equipment high-speed operation on the one hand, on the other hand realizes overload protection.

The utility model discloses simple structure, convenient to use, control effectual, the practicality is strong, the combined cost is low, operation process safe and reliable, and the highest operating speed can reach 500 meters/minute.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, and that the scope of the invention is defined by the appended claims.

Claims

1. A novel roller straightening machine is characterized in that: comprises a pinch roll pressing oil cylinder (1), a rack (2), pinch rolls, an upper straightening roll pressing oil cylinder (7), upper straightening rolls (11), a lower straightening roll system (12), a straightening roll transmission assembly (13), pinch roll transmission assemblies (14) and a control assembly, wherein the pinch roll pressing oil cylinder (1), the pinch rolls, the upper straightening roll pressing oil cylinder (7), the upper straightening rolls (11) and the lower straightening roll system (12) are all arranged on the rack (2), the upper straightening rolls (11) are multiple, the upper straightening rolls (11) are arranged at the upper ends of the lower straightening roll system (12), the upper straightening roll pressing oil cylinders (7) are multiple, the upper straightening roll pressing oil cylinders (7) are arranged at the upper ends of the corresponding upper straightening rolls (11) and connected with each other, the axes of the pinch rolls are parallel to the axis of the lower straightening roll system (12), the pinch rolls comprise upper pinch rolls (5) and lower pinch rolls (6), the upper pinch roll roller (5) is arranged at the upper end of the lower pinch roll roller (6), the top height of the lower pinch roll roller (6) and the top height of the lower straightening roll system (12) are located on the same horizontal plane, the pinch roll pressing oil cylinder (1) is arranged at the top of the upper pinch roll roller (5) and connected with the upper pinch roll roller, the straightening roll transmission assembly (13) is connected with the upper straightening roll rollers (11) and the lower straightening roll system (12) respectively, the pinch roll transmission assembly (14) is connected with the upper pinch roll roller (5) and the lower pinch roll roller (6) respectively, and the pinch roll pressing oil cylinder (1) and the upper straightening roll pressing oil cylinders (7) are connected with the control assembly respectively.

2. The novel roll leveler as set forth in claim 1, wherein: the rack (2) comprises a connecting plate (2-1), an operation side housing (2-2), a base (2-3), a first beam (2-4), a second beam (2-5), a third beam (2-6), a fourth beam (2-7), a transmission side housing (2-8), a pinch roll guide window (2-9), a lower straightening roll system installation window (2-10), an upper straightening roll independent guide window (2-11), a pinch roll pressing oil cylinder installation hole (2-12) and an upper straightening roll pressing oil cylinder installation hole (2-13), wherein the operation side housing (2-2) and the transmission side housing (2-8) are relatively fixed on the base (2-3) through bolts, the base (2-3) is installed on an equipment base, the first beam (2-4), the second beam (2-5), the third beam (2-6) and the fourth beam (2-7) are used for respectively connecting the side surfaces of the operation side housing (2-2) and the transmission side housing (2-8) from top to bottom through bolts and positioning pins, wherein the connecting plate (2-1) is used for connecting the top of the operation side housing (2-2) and the top of the transmission side housing (2-8) through bolts and positioning pins, the pinch roll guide window (2-9) is arranged between the operation side housing (2-2) and the transmission side housing (2-8) and is used for installing an upper pinch roll (5) and a lower pinch roll (6), the pinch roll guide window (2-9) is of an 8-shaped structure, and the lower straightening roll system installation window (2-10) is arranged between the operation side housing (2-2) and the transmission side housing (2-8) A lower straightening roll system installation window (2-10) and a pinch roll guide window (2-9) are arranged in parallel, wherein the lower straightening roll system installation window (2-10) is used for installing a lower straightening roll system (12), an upper straightening roll independent guide window (2-11) is arranged at the top of the lower straightening roll system installation window (2-10), an upper straightening roll independent guide window (2-11) is used for installing an upper straightening roll (11), a pinch roll pressing oil cylinder installation hole (2-12) is arranged at the top of the pinch roll guide window (2-9), a pinch roll pressing oil cylinder installation hole (2-12) is used for installing a pinch roll pressing oil cylinder (1), an upper straightening roll pressing oil cylinder installation hole (2-13) is arranged at the top of the upper straightening roll independent guide window (2-11), wherein the upper straightening roll screwdown oil cylinder mounting hole (2-13) is used for mounting the upper straightening roll screwdown oil cylinder (7), and the operating side and the transmission side of the pinch roll guide window (2-9), the lower straightening roll system mounting window (2-10) and the upper straightening roll independent guide window (2-11) are respectively provided with a pressing plate for preventing the pinch roll or the straightening roll from axially moving in series.

3. The novel roll leveler as set forth in claim 2, wherein: the thickness of steel plates of the operation side memorial archways (2-2) and the transmission side memorial archways (2-8) is 50-150 mm, the operation side memorial archways and the transmission side memorial archways can be machined by adopting a whole steel plate or integrally cast, the third cross beams (2-6) are arranged at the upper straightening roll independent guide windows (2-11) and used for improving the rigidity and the strength of the upper straightening roll independent guide windows (2-11), and the fourth cross beams (2-7) are arranged at the bottoms of the lower straightening roll system installation windows (2-10) and used for supporting the lower straightening roll system installation windows (2-10).

4. The novel roll leveler as set forth in claim 2, wherein: the lower end of the pinch roll pressing oil cylinder (1) is in a flange installation form and is fixed in a pinch roll pressing oil cylinder installation hole (2-12) through a bolt, the lower end of the pinch roll pressing oil cylinder (1) is connected with a pinch roll oil cylinder connector (3) through a thread, the bottom of the pinch roll oil cylinder connector (3) is connected with the top of a transition connector (4) through a pin shaft, the bottom of the transition connector (4) is connected with bearing blocks on two sides of a pinch roll upper roll (5) through bolts, two sides of the bearing blocks of the pinch roll upper roll (5) and the upper part of a pinch roll guide window (2-9) form a sliding pair in clearance fit, a pinch roll lower roll (6) is installed on the lower part of the pinch roll guide window (2-9), and two sides of the bearing blocks of the pinch roll lower roll (6) and the lower part of the pinch roll guide, pinch roll press plates (15) are arranged on the operation side and the transmission side of the pinch roll guide window (2-9), wherein the pinch roll press plates (15) are fixed on the rack (2) through bolts and used for restraining axial movement of the pinch roll upper roll (5) and the pinch roll lower roll (6), and the pinch roll upper roll (5) can ascend or descend along with the stretching out and retracting of the pinch roll pressing oil cylinder (1).

5. The novel roll leveler as set forth in claim 2, wherein: the lower end of the upper straightening roll pressing oil cylinder (7) is in a flange mounting mode and is fixed in an upper straightening roll pressing oil cylinder mounting hole (2-13) through a bolt, the lower end of the upper straightening roll pressing oil cylinder (7) is connected with an upper straightening roll pressing oil cylinder joint (9) penetrating through a graphite sliding sleeve (8), the graphite sliding sleeve (8) is fixed in a rack (2) through a bolt, one end of the upper straightening roll pressing oil cylinder joint (9) penetrates through an inner hole of the graphite sliding sleeve (8) to form a sliding pair in clearance fit with the inner hole, and is connected with the lower end of the upper straightening roll pressing oil cylinder (7) through a thread in the rack (2), the other end of the upper straightening roll pressing oil cylinder joint (9) is connected with a bearing seat of an upper straightening roll (11) through a pressing block (10), the pressing block (10) is fixed on the bearing seat of the upper straightening roll (11) through a bolt, the graphite sliding sleeve (8), The upper straightening roll pressing oil cylinder connector (9), the pressing block (10) and the upper straightening roll (11) are arranged inside an upper straightening roll independent guide window (2-11), the upper straightening roll (11) consists of an upper straightening roll working roll (11-1) and two upper straightening roll bearing seats (11-2), wherein the two upper straightening roll bearing seats (11-2) are respectively arranged on the operation side and the transmission side of the upper straightening roll working roll (11-1), the two sides of the upper straightening roll bearing seats (11-2) and the upper straightening roll independent guide window (2-11) form a clearance fit sliding pair, the two sides of the upper straightening roll independent guide window (2-11) are provided with upper straightening roll pressing plates (16), and the upper straightening roll pressing plates (16) are fixed on the rack (2) through bolts and used for restraining axial movement of the upper straightening roll (11), the upper straightening roller pressing oil cylinder (7) can drive the upper straightening roller (11) to independently ascend or descend in the upper straightening roller independent guide window (2-11), and then the overlapping amount required by straightening is adjusted.

6. The novel roll leveler as set forth in claim 2, wherein: the lower straightening roll system (12) is integrally arranged in a lower straightening roll system installation window (2-10), wherein the lower straightening roll system (12) comprises a lower straightening roll system working roll (12-1) and two groups of lower straightening roll system bearing blocks (12-2), the two groups of lower straightening roll system bearing blocks (12-2) are respectively arranged on the operation side and the transmission side of the lower straightening roll system working roll (12-1), two sides of the lower straightening roll system bearing blocks (12-2) and the lower straightening roll system installation window (2-10) form a sliding pair in clearance fit, lower straightening roll system pressing plates (17) are arranged on two sides of the lower straightening roll system installation window (2-10), the lower straightening roll system pressing plates (17) are fixed on the rack (2) through bolts and used for restraining axial movement of the lower straightening roll system (12), and the lower straightening roll system (12) is not lifted integrally, wherein the lower straightening roll is a bearing seat (12-2) of an integral structure.

7. The novel roll leveler as set forth in claim 1, wherein: the straightening roller transmission assembly (13) comprises a variable frequency motor (13-1), a speed reducer (13-2), a gear distribution box (13-3) and a universal coupling (13-4), wherein the variable frequency motor (13-1) is connected with the speed reducer (13-2) through a coupling, the speed reducer (13-2) is connected with the gear distribution box (13-3) through a coupling, and the gear distribution box (13-3) is connected with a plurality of upper straightening rollers (11) and a plurality of lower straightening roller systems (12) through the universal coupling (13-4) respectively; the pinch roll transmission assembly (14) comprises a pinch roll transmission variable frequency motor (14-1), a pinch roll speed reducer (14-2) and a pinch roll universal coupling (14-3), wherein the pinch roll transmission variable frequency motor (14-1) is connected with the pinch roll speed reducer (14-2) through couplings, and the pinch roll speed reducer (14-2) is connected with the pinch roll upper roll (5) and the pinch roll lower roll (6) through the pinch roll universal coupling (14-3) respectively.

8. The novel roll leveler as set forth in claim 1, wherein: the control assembly comprises a servo valve (19), pressure sensors (20), displacement sensors (21) and a controller (22), wherein an upper straightening roller pressing oil cylinder (7) is arranged above the transmission side and the operation side of each upper straightening roller (11), the upper straightening roller pressing oil cylinders (7) are connected with the servo valve (19) through pipelines, the servo valve (19) is connected with the controller (22) through cables, the pressure sensors (20) are arranged on oil inlet pipelines of rodless cavities of the upper straightening roller pressing oil cylinders (7) and used for measuring the pressure of the rodless cavities, the displacement sensors (21) are arranged in the upper straightening roller pressing oil cylinders (7) and used for accurately measuring the extending amount of the oil cylinders, and the controller (22) is a single chip microcomputer.