CN-121972952-A - Tool and method for disassembling and assembling screw-down bolt of cold rolling temper mill

CN121972952ACN 121972952 ACN121972952 ACN 121972952ACN-121972952-A

Abstract

The invention discloses a cold rolling leveling machine screw-down bolt dismounting tool which comprises a machine base, a motor, a rotating part, a first guide sleeve, a movable plate and driving rods, wherein a hanging hole is formed in the machine base, the motor is fixedly arranged on the machine base, the rotating part is rotatably arranged on the machine base, an output shaft of the motor is connected with the rotating part through an intermediate transmission part, the first guide sleeve is provided with a plurality of driving rods, each driving rod is vertically arranged, the upper end of each driving rod is fixedly arranged on the movable plate, the lower end of each driving rod extends into one first guide sleeve and is in clearance fit with the first guide sleeve, all driving rods are distributed around one datum center line, the movable plate is provided with a connecting hole, so that the movable plate and the screw-down bolt are fixed together after the connecting bolts penetrate through the connecting hole, and a space exists between the center line of the connecting hole and the datum center line. The invention can realize the automatic and accurate control of the disassembly and assembly process of the screw bolt, and the disassembly and assembly process is safe, quick and labor-saving, and the disassembly and assembly efficiency is high.

Inventors

ZHAO HUIBIN
TANG XIAOCHAO
ZHANG YUQIAN
WU JIANGANG
ZENG CHANGMIN

Assignees

中国一冶集团有限公司

Dates

Publication Date: 20260505
Application Date: 20260309

Claims (10)

1. The utility model provides a cold rolling levelling machine screw down bolt assembly and disassembly tools which characterized in that, including frame, motor, rotor, first guide sleeve, movable plate and actuating lever, wherein: the machine base is provided with a hanging hole; The motor is fixedly arranged on the base, the rotating piece is rotatably arranged on the base, and an output shaft of the motor is connected with the rotating piece through an intermediate transmission part so as to be used for driving the rotating piece to rotate; The plurality of first guide sleeves are arranged, the central line of each first guide sleeve is vertically arranged, and each first guide sleeve is fixedly arranged on the rotating piece respectively; The driving rods are vertically arranged, the upper ends of the driving rods are fixedly arranged on the movable plate, the lower ends of the driving rods extend into one first guide sleeve and are in clearance fit with the first guide sleeve, so that the driving rods move up and down along the axial direction of the first guide sleeve, and all the driving rods are distributed around a datum center line, wherein the datum center line is coaxial with the center line of a pressing bolt to be dismounted; The movable plate is provided with a connecting hole, so that the movable plate and the pressing bolt are fixed together after the connecting bolt passes through the connecting hole, and a space exists between the center line of the connecting hole and the reference center line.
2. The cold rolling mill screw down bolt assembly and disassembly tool according to claim 1, wherein the stand comprises a fixing frame, a containing cylinder and a plurality of lifting lugs, wherein the containing cylinder is fixedly installed on the fixing frame and used for containing the screw down bolt, and each lifting lug is provided with one lifting hole.
3. The cold rolling mill screw down bolt removing tool according to claim 1, wherein the stand comprises a fixed base and a second guide sleeve, the second guide sleeve is vertically arranged and the lower end of the second guide sleeve is fixedly arranged on the fixed base; The movable plate is provided with a central guide rod, the lower end of the central guide rod extends into the second guide sleeve, and the central guide rod is in clearance fit with the second guide sleeve; wherein, the central line of second direction sleeve is the benchmark central line.
4. The cold rolling mill screw down bolt assembly and disassembly tool of claim 3, wherein the center guide bar includes a main bar body and a piston mounted on the main bar body, the piston being in clearance fit with the second guide sleeve.
5. The cold rolling mill screw down bolt assembly and disassembly tool according to claim 3, wherein the second guide sleeve comprises an upper sleeve, a middle sleeve and a lower sleeve which are coaxially and sequentially arranged from top to bottom, a space exists between the upper sleeve and the middle sleeve, the upper sleeve is connected to the middle sleeve through a plurality of connecting rods, the upper end of the lower sleeve is fixedly arranged on the middle sleeve, and the middle sleeve is fixed with a support frame arranged on the fixing base.
6. The cold rolling mill screw down bolt dismounting tool according to claim 3, wherein an elastic limit cushion layer capable of generating elastic deformation is mounted on the fixed base, and the elastic limit cushion layer is positioned in the second guide sleeve so as to generate elastic deformation and receive the bottom of the center guide rod after the bottom of the center guide rod descends and presses the elastic limit cushion layer; The side wall of the lower sleeve is also provided with an observation window for observing the real-time position of the bottom of the central guide rod in the second guide sleeve.
7. The cold rolling temper mill screw down bolt dismounting tool according to claim 3, wherein a center spline hole is arranged on the movable plate, a center line of the center spline hole is the reference center line, a spline is arranged at the upper end of the center guide rod, the spline of the center guide rod is matched with the center spline hole on the movable plate, and the lower end of the center guide rod is supported by the stand; the connecting holes on the movable plate are divided into a plurality of groups of connecting hole groups, the plurality of connecting holes of each group of connecting hole groups are distributed on the same circle, and the connecting hole groups of different groups are distributed on different circles so as to adapt to the pressing bolts of various specifications.
8. A cold rolling mill screw down bolt removing tool according to claim 3, wherein a plurality of ultrasonic transducers are arranged on the top surface of the movable plate and are annularly arranged for vibrating the screw down bolt by activating the ultrasonic transducers at the initial stage of screw down bolt removing to loosen the screw down bolt.
9. The cold rolling mill screw down bolt removing tool of claim 1, wherein the rotating member includes a driven gear rotatably mounted on the stand, and the intermediate transmission member includes a driving gear; The output shaft of the motor is vertically arranged, and the driving gear is fixedly arranged on the output shaft of the motor; The driven gear is installed on the machine base through a bearing, the center line of the driven gear is vertically arranged, the driven gear is meshed with the driving gear, and all the first guide sleeves are installed on the driven gear.
10. The method for disassembling and assembling the reduction bolt by using the cold rolling temper mill reduction bolt disassembling tool according to any one of claims 1to 9, characterized by comprising the following steps: 1) The screw down bolt disassembly process is as follows: 1.1 The bottom surface of the pressing bolt to be dismantled is fixedly connected with the movable plate through the connecting bolt, wherein the movable plate is positioned above all the first guide sleeves and has a distance with each first guide sleeve respectively; 1.2 The motor is started, the motor drives the rotating piece to rotate, and the rotating piece drives the movable plate to rotate along a first direction through the first guide sleeve and the driving rod, so that the pressing bolt is gradually screwed out of the bolt hole of the cold rolling temper mill, and the pressing bolt and the movable plate gradually descend while the pressing bolt is screwed out; 1.3 When the screw-down bolt is completely unscrewed from the bolt hole of the cold rolling temper mill, the motor stops rotating, and the crown block moves the screw-down bolt dismounting tool of the cold rolling temper mill and the screw-down bolt out of the working area; (2) The screw down bolt installation process is as follows: 2.1 The rolling bolt to be installed is fixedly connected to the movable plate through a connecting bolt, all the first guide sleeves jointly bear the movable plate, the rolling bolt disassembling tool of the cold rolling temper mill and the rolling bolt to be installed are lifted to an installation position through a crown block, and the top of the rolling bolt is aligned to a bolt hole of the cold rolling temper mill; 2.2 The motor is driven to rotate, the rotating piece drives the movable plate to rotate along a second direction opposite to the first direction through the first guide sleeve and the driving rod, the pressing bolt is gradually screwed into the bolt hole of the cold rolling temper mill along with the rotation of the movable plate, and the pressing bolt and the movable plate gradually rise while the pressing bolt is screwed in; 2.3 After the isobaric lower bolt is screwed in place, the connecting bolt for connecting the movable plate with the bottom surface of the pressing bolt is removed, and the crown block integrally moves the cold rolling temper mill pressing bolt dismounting tool out of the working area.

Description

Tool and method for disassembling and assembling screw-down bolt of cold rolling temper mill Technical Field The invention belongs to the field of cold rolling planners, and particularly relates to a tool and a method for disassembling and assembling a screw-down bolt of a cold rolling planishing mill. Background The cold rolling leveling machine is core equipment of a strip steel finish machining production line, and has the main functions of improving the shape, flatness and surface performance of the strip steel through rolling pressure. The pressing device is used as a key bearing mechanism for controlling the roll gap and adjusting the rolling force at the top of a frame of the leveling machine, and the internal pressing bolt bears extremely large static load and dynamic impact. Because the screw bolt is in heavy load, vibration and high frequency adjustment for a long time, the abrasion and fatigue of the screw pair are unavoidable, so that the screw bolt is regularly detached and checked or replaced to be a necessary maintenance means for ensuring the normal operation of the leveling machine. In the existing engineering practice, as the frame of the leveling machine is relatively high (usually more than 5 meters), and the top is provided with a complex hydraulic pipeline, a sensor and a transmission shaft, the working space for pressing down the bolts is extremely narrow and high. The existing disassembly and assembly work mainly depends on an original combination mode of 'manual work, crown block and chain block'. The screw down bolt belongs to heavy parts with large weight and high precision, and the weight of a single body is often hundreds of kilograms or more. Traditional maintenance methods require that service personnel must work on a temporarily built scaffold or a narrow platform at the top of the frame, and that multiple people cooperate, one person operates the chain, and the other person or persons manually rotate the bolts. In the rotation process, due to continuous movement of the gravity center and uneven stress of the chain, the screw bolt which is pressed down and weighs hundreds of kilograms is extremely easy to shake violently or accidentally tip over due to the slipping of the sling, and the accident of squeezing injury, scratching and even serious falling injury is extremely easy to occur in a narrow space. In addition, manual turning of heavy bolts requires tremendous torque, and service personnel often need to use wrenches that lengthen the moment arm to perform the repeated operations. Under the adverse circumstances of high temperature, greasy dirt and high altitude, this kind of high strength's physical consumption leads to overhauling efficiency extremely low, and the dismouting of single bolt often takes several hours even more, has seriously restricted whole maintenance progress and the equipment utilization ratio of production line. In addition, during installation, service personnel need to manually centralize the bolts in mid-air by means of crown block fit hoisting in an attempt to align the first turn of threads on the top thereof with the nut holes in the frame of the screwdown. Because of lack of accurate mechanical guidance, the soft cable hoisting is easy to generate axial inclination, and once the screw is not aligned to forcibly screw in, the screw is easy to generate a phenomenon of 'seizure', so that expensive screw-down bolts and screw holes are damaged permanently. Disclosure of Invention Aiming at the defects or improvement demands of the prior art, the invention provides a tool and a method for disassembling and assembling a screw-down bolt of a cold rolling temper mill, which are safe, quick and labor-saving and have high disassembling and assembling efficiency. In order to achieve the above object, according to one aspect of the present invention, there is provided a cold rolling mill screw-down bolt attaching and detaching tool comprising a stand, a motor, a rotating member, a first guide sleeve, a moving plate, and a driving lever, wherein: the machine base is provided with a hanging hole; The motor is fixedly arranged on the base, the rotating piece is rotatably arranged on the base, and an output shaft of the motor is connected with the rotating piece through an intermediate transmission part so as to be used for driving the rotating piece to rotate; The plurality of first guide sleeves are arranged, the central line of each first guide sleeve is vertically arranged, and each first guide sleeve is fixedly arranged on the rotating piece respectively; The driving rods are vertically arranged, the upper ends of the driving rods are fixedly arranged on the movable plate, the lower ends of the driving rods extend into one first guide sleeve and are in clearance fit with the first guide sleeve, so that the driving rods move up and down along the axial direction of the first guide sleeve, and all the driving rods are distributed around a datum center line,