CN112024609A - Method for rapidly replacing transmission shaft of cold rolling mill - Google Patents
Method for rapidly replacing transmission shaft of cold rolling mill Download PDFInfo
- Publication number
- CN112024609A CN112024609A CN201910479815.5A CN201910479815A CN112024609A CN 112024609 A CN112024609 A CN 112024609A CN 201910479815 A CN201910479815 A CN 201910479815A CN 112024609 A CN112024609 A CN 112024609A
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- CN
- China
- Prior art keywords
- transmission shaft
- roll changing
- rolling mill
- trolley
- roll
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
- B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
- B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
- B21B31/103—Manipulators or carriages therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
Abstract
The invention relates to a method for rapidly replacing a transmission shaft of a cold rolling mill, which comprises the following steps: and (4) stopping the machine, drawing the roller, resetting the working roller, connecting the working roller with a transmission shaft to be replaced, installing a clamping device and a steel wire rope for supporting, moving out of the rack for replacement, installing and resetting and the like. The method for rapidly replacing the transmission shaft of the cold rolling mill can effectively solve the problems of long replacement time, low working efficiency, large potential safety hazard and the like of the transmission shaft of the UCM mill. According to the method, the existing method is improved on the premise of utilizing the existing roll changing cart, the working efficiency is improved while equipment is not increased and potential safety hazards are reduced, the time for replacing one transmission shaft is about 24 hours originally, the operation time for replacing the transmission shaft is shortened to 6 hours after the method is used, and the operation efficiency is improved by 4 times.
Description
Technical Field
The invention relates to a method for quickly replacing a transmission shaft of a cold rolling mill, belonging to the technical field of cold rolling.
Background
Five continuous rolling mills of six rollers of UCM have 5 frames, six rollers are installed to every rack-mount, 2 backing rolls, 2 middle rolls, 2 working rolls, every frame adopts a motor drive, the motor passes through the shaft coupling and is connected with the reducing gear box, the gear box is the one-level speed reduction, then two upper and lower output shafts are distributed, respectively through cross hair formula universal joint with power transmission to upper and lower working rolls, the transmission shaft is used for connecting transmission tooth case and working roll, the transmission rolling moment, 5 sets of transmission shafts are cross head universal joint, because the rolling mill is 24 hours continuity work and transmission moment is big, so the shaft coupling universal joint need utilize the regular repair to regularly roll off the production line to its inside bearing, the cross head, the jaw is maintained.
The conventional replacement method is: 1. drawing the working roll out of the frame; 2. Removing an air pipe above the universal spindle on the transmission side of the rolling mill; 3. The universal joint shaft is embraced by the traveling crane; 4. Removing a flat head sleeve between the universal joint shaft and the reduction gearbox; 5. Removing a flat head sleeve between the universal joint shaft and the working roll; 6. Hanging out the old universal spindle from the transmission side of the rolling mill; 7. Installing a new universal joint shaft; 8. And (5) reinstalling the air pipe.
Because the UCM rolling mill has compact structure and small space at the transmission side of the rolling mill, the air pipes, the oil pipes and the closed covers above the transmission shaft are blocked by related equipment such as a roller shifting cylinder and the like at the left side and the right side, the transmission shaft body has long length and is very difficult to lift, and the conventional method needs 24 hours for replacing one transmission shaft. In view of the current situation, a technician has made an investigation and hopefully changes the transmission shaft replacement method to shorten the replacement operation time and improve the work efficiency.
Disclosure of Invention
The invention aims to solve the technical problems that: the technical defects are overcome, and the quick replacement method for the transmission shaft of the cold rolling mill is provided.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a method for rapidly replacing a transmission shaft of a cold rolling mill; the method uses a roll changing vehicle; the roll changing trolley comprises a roll changing cart and a roll changing trolley borne by the roll changing cart; the roll changing trolley can move between a first position and a second position relative to the roll changing cart; the method comprises the following steps:
(1) stopping the roll changing vehicle at a roll changing position beside the rolling mill, shutting down the rolling mill, and drawing out working rolls and intermediate rolls in a rack of the rolling mill from the rack; the middle roller and the working roller without the need of replacing the transmission shaft are moved away, the working roller with the need of replacing the transmission shaft is placed on the roller replacing cart and is clamped by the roller replacing trolley, and the roller replacing trolley is positioned at a first position;
(2) moving the roll changing trolley to a second position, and installing the working roll of which the transmission shaft needs to be changed into a rack of the rolling mill;
(3) fixing the cross bags at two ends of the transmission shaft to be replaced by using a clamping device;
(4) connecting one end of the transmission shaft, which is far away from the roll changing trolley, with the upper part of the roll changing trolley by using a steel wire rope;
(5) removing the bolt at one end of the transmission shaft, which is far away from the roll changing trolley, so that the bolt is separated from the eccentric sleeve;
(6) moving the roll changing trolley to reset to a first position, then moving the roll changing trolley to drive away from a roll changing position, and pulling out the transmission shaft from the rack;
(7) the transmission shaft is held by a traveling crane and replaced; then the travelling crane moves the replaced conveying shaft away;
(8) moving the roll changing cart to a roll changing position;
(9) driving the roll changing trolley to move to a second position, and sending the working roll and the transmission shaft back to the interior of the rolling mill by using the roll changing trolley;
(10) connecting the flat head sleeve with the transmission shaft; and removing the clamping device and the steel wire rope, and moving the roll changing trolley to a first position to complete the replacement of the transmission shaft.
The scheme is further improved in that: in the step (3), the clamping device is composed of two half support rings, the two half support rings form a circle, one ends of the two half support rings are connected through a connecting pin, and the other ends of the two half support rings are locked through the connecting pin with a connecting nut; the two half support rings form a circle, two opposite clamping claws are arranged in the horizontal direction, and two opposite pressing plates are arranged in the vertical direction; the clamping claws and the pressing plate are mounted on the two half support rings through screws and nuts.
The method for rapidly replacing the transmission shaft of the cold rolling mill can effectively solve the problems of long replacement time, low working efficiency, large potential safety hazard and the like of the transmission shaft of the UCM mill. According to the method, the existing method is improved on the premise of utilizing the existing roll changing cart, the working efficiency is improved while equipment is not increased and potential safety hazards are reduced, the time for replacing one transmission shaft is about 24 hours originally, the operation time for replacing the transmission shaft is shortened to 6 hours after the method is used, and the operation efficiency is improved by 4 times.
Drawings
The invention will be further explained with reference to the drawings.
Fig. 1 is a schematic view of an application scenario of a preferred embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a fixed transmission shaft and a working roll.
Fig. 3 is a schematic view of the structure of the clamping device.
Detailed Description
Examples
The method for rapidly replacing the transmission shaft of the cold rolling mill in the embodiment; the method uses a roll changing vehicle; as shown in fig. 1, the roll changing cart comprises a roll changing cart 10 and a roll changing trolley 9 carried by the roll changing cart 10; the roll changing cart 10 is driven by a motor 11 to move by wheels 24, the end part of the roll changing cart 9 is provided with a clamping opening capable of clamping a working roll, the roll changing cart 9 is of a gear rack structure driven by the motor 8 and can drive the roll changing cart 9 to move between a first position and a second position relative to the roll changing cart 10, and thus, the roll changing cart 9 drives the working roll to move by means of the wheels 23 at the bottom of the roll changing cart along with the driving of the motor 9. A support roller 5-1, a middle roller 6-1, a working roller 7-2, a middle roller 6-2 and a support roller 5-2 are arranged in a rack of the rolling mill from top to bottom; wherein, the working roll 7-1 and the working roll 7-2 are respectively connected with the driving motor 1 through the transmission shaft 3-1 and the transmission shaft 3-2, the two ends of the transmission shaft 3-1 and the transmission shaft 3-2 are respectively connected with the deflection head sleeve through the cross-shaped bag 2-1, the cross-shaped bag 2-3, the cross-shaped bag 2-2 and the cross-shaped bag 2-4, and the air pipe 4 is arranged above the transmission shaft 3-1. The roll changing vehicle is stopped at the roll changing position at the operation side of the frame.
The method comprises the following steps:
(1) stopping the roll changing vehicle at a roll changing position beside the rolling mill, shutting down the rolling mill, and drawing out a working roll 7-1, a working roll 7-2, an intermediate roll 6-1 and an intermediate roll 6-2 in a rack of the rolling mill from the rack; the middle roller and the working roller without the need of replacing the transmission shaft are moved away, the working roller with the need of replacing the transmission shaft is placed on a roller replacing cart 10 and is clamped by a roller replacing trolley 9; at this time, the roll changing trolley 9 is located at a first position far away from the rolling mill;
(2) moving the roll changing trolley 9 to a second position close to the rolling mill, and installing the working roll of which the transmission shaft needs to be changed into a rack of the rolling mill;
(3) fixing the cross bags at two ends of the transmission shaft to be replaced by using the clamping devices 12-1 and 12-2;
(4) as shown in fig. 2, one end of the transmission shaft far away from the roll changing trolley is connected with the upper part of the roll changing trolley 9 by using a steel wire rope 25; so that the steel wire rope, the transmission shaft, the working roll and the roll changing trolley form a stable right-angled triangle;
(5) removing the bolt at one end of the transmission shaft far away from the roll changing trolley 9 to separate the bolt from the eccentric sleeve;
(6) the movable roll changing trolley 9 is reset to a first position, and the rear movable roll cart 10 is driven away from the roll changing position to pull out the transmission shaft from the frame;
(7) the transmission shaft is held by a traveling crane and replaced; then the travelling crane moves the replaced conveying shaft away;
(8) moving the roll changing cart 10 to a roll changing position;
(9) driving the roll changing trolley 9 to move to a second position, and returning the working roll and the transmission shaft to the interior of the rolling mill by using the roll changing trolley 9;
(10) connecting the transmission shaft with the flat head sleeve; and operating the clamping opening of the roll changing trolley 9 to release the working roll, dismantling the clamping device and the steel wire rope, and moving the roll changing trolley 9 back to the first position to complete the replacement of the transmission shaft.
As shown in fig. 3, the clamping device is composed of two half-rings, which form a circular ring 13, one end of which is connected by a connecting pin 22 and the other end of which is locked by a connecting pin 17 with a connecting nut 18, the connecting nut 18 being adjustable in tightness.
The circular support ring 13 is provided with two opposite clamping claws 21-1 and 21-2 in the horizontal direction, the clamping claws 21-1 and the clamping claws 21-2 are respectively connected with a screw rod, the screw rods penetrate through the circular support ring 13 and are respectively locked by using locking nuts 19-1 and 19-2 on the outer side of the circular support ring 13, so that the locking nuts 19-1 and 19-2 can be loosened when needed to adjust the size of the gap between the clamping claws 21-1 and the clamping claws 21-2. In order to facilitate holding, the tail part of the screw rod is respectively and fixedly connected with an adjusting nut 20-1 and an adjusting nut 20-2.
Two opposite pressing plates 16-1 and 16-2 are arranged on the circular supporting ring 13 in the vertical direction; the pressure plate 16-1 and the pressure plate 16-2 are respectively connected with a screw rod, the screw rod penetrates through the circular support ring 13, and the outer side of the circular support ring 13 is respectively locked by using a locking nut 15-1 and a locking nut 15-2, so that the locking nut 15-1 and the locking nut 15-2 can be loosened when needed, and the size of the gap between the pressure plate 16-1 and the pressure plate 16-2 can be adjusted. In order to facilitate holding, the tail part of the screw rod is respectively and fixedly connected with an adjusting nut 14-1 and an adjusting nut 14-2.
Since the circular support ring 13 can be freely adjusted in rotation, the horizontal and vertical directions proposed in this embodiment are relative reference directions, and the relative directions necessarily change with the adjustment of the circular support ring 13.
The clamp plate in this embodiment is the plain end face, according to the on-the-spot condition, can also select the arc terminal surface, decides the shape of terminal surface according to the cross package of different sizes, and the axle diameter is ¢ 300mm above preferably selects the plain end face, like: ¢ 323 mm. ¢ 300mm or less preferably an arcuate end face, e.g.; 267 mm; the purpose is to effectively adjust the deviation between the flat head sleeve and the cross universal joint shaft screw hole;
the clamping jaws are wedge-shaped and are characterized by an oblique angle of 15 to 30, preferably 15, with the purpose of being able to be effectively wedged into the gap between the cross-piece and the universal joint.
The present invention is not limited to the above-described embodiments. All technical solutions formed by equivalent substitutions fall within the protection scope of the claims of the present invention.
Claims (2)
1. A method for rapidly replacing a transmission shaft of a cold rolling mill; characterized in that the method uses a roll changing carriage; the roll changing trolley comprises a roll changing cart and a roll changing trolley borne by the roll changing cart; the roll changing trolley can move between a first position and a second position relative to the roll changing cart; the method comprises the following steps:
(1) stopping the roll changing vehicle at a roll changing position beside the rolling mill, shutting down the rolling mill, and drawing out working rolls and intermediate rolls in a rack of the rolling mill from the rack; the middle roller and the working roller without the need of replacing the transmission shaft are moved away, the working roller with the need of replacing the transmission shaft is placed on the roller replacing cart and is clamped by the roller replacing trolley, and the roller replacing trolley is positioned at a first position;
(2) moving the roll changing trolley to a second position, and installing the working roll of which the transmission shaft needs to be changed into a rack of the rolling mill;
(3) fixing the cross bags at two ends of the transmission shaft to be replaced by using a clamping device;
(4) connecting one end of the transmission shaft, which is far away from the roll changing trolley, with the upper part of the roll changing trolley by using a steel wire rope;
(5) removing the bolt at one end of the transmission shaft, which is far away from the roll changing trolley, so that the bolt is separated from the eccentric sleeve;
(6) moving the roll changing trolley to reset to a first position, then moving the roll changing trolley to drive away from a roll changing position, and pulling out the transmission shaft from the rack;
(7) the transmission shaft is held by a traveling crane and replaced; then the driving vehicle moves the replaced transmission shaft away;
(8) moving the roll changing cart to a roll changing position;
(9) driving the roll changing trolley to move to a second position, and sending the working roll and the transmission shaft back to the interior of the rolling mill by using the roll changing trolley;
(10) connecting the flat head sleeve with the transmission shaft; and removing the clamping device and the steel wire rope, and moving the roll changing trolley to a first position to complete the replacement of the transmission shaft.
2. The method for rapid exchange of a drive shaft of a cold rolling mill according to claim 1, characterized in that: in the step (3), the clamping device is composed of two half support rings, the two half support rings form a circle, one ends of the two half support rings are connected through a connecting pin, and the other ends of the two half support rings are locked through the connecting pin with a connecting nut; the two half support rings form a circle, two opposite clamping claws are arranged in the horizontal direction, and two opposite pressing plates are arranged in the vertical direction; the clamping claws and the pressing plate are mounted on the two half support rings through screws and nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479815.5A CN112024609A (en) | 2019-06-04 | 2019-06-04 | Method for rapidly replacing transmission shaft of cold rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479815.5A CN112024609A (en) | 2019-06-04 | 2019-06-04 | Method for rapidly replacing transmission shaft of cold rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112024609A true CN112024609A (en) | 2020-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910479815.5A Pending CN112024609A (en) | 2019-06-04 | 2019-06-04 | Method for rapidly replacing transmission shaft of cold rolling mill |
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| Country | Link |
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| CN (1) | CN112024609A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114700370A (en) * | 2022-03-29 | 2022-07-05 | 柳州钢铁股份有限公司 | Rapid installation method of universal coupling of heavy and medium plate mill |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002248510A (en) * | 2000-12-13 | 2002-09-03 | Mitsubishi Heavy Ind Ltd | Device for roll rearrangement of rolling machine and method for roll rearrangement |
| CN101462121A (en) * | 2007-12-19 | 2009-06-24 | 中冶赛迪工程技术股份有限公司 | Wire rod bar blooming mill |
| CN203649810U (en) * | 2013-12-26 | 2014-06-18 | 秦皇岛首秦金属材料有限公司 | Device for quickly and integrally replacing main transmission shaft of four-roll rolling mill |
| CN104858239A (en) * | 2015-05-20 | 2015-08-26 | 中国重型机械研究院股份公司 | Rapid roll changing device and method for multi-roll mill |
| CN107309276A (en) * | 2017-07-31 | 2017-11-03 | 莱芜钢铁集团有限公司 | A kind of method for being used to change the cross bag of milling train lower drive shaft |
-
2019
- 2019-06-04 CN CN201910479815.5A patent/CN112024609A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002248510A (en) * | 2000-12-13 | 2002-09-03 | Mitsubishi Heavy Ind Ltd | Device for roll rearrangement of rolling machine and method for roll rearrangement |
| CN101462121A (en) * | 2007-12-19 | 2009-06-24 | 中冶赛迪工程技术股份有限公司 | Wire rod bar blooming mill |
| CN203649810U (en) * | 2013-12-26 | 2014-06-18 | 秦皇岛首秦金属材料有限公司 | Device for quickly and integrally replacing main transmission shaft of four-roll rolling mill |
| CN104858239A (en) * | 2015-05-20 | 2015-08-26 | 中国重型机械研究院股份公司 | Rapid roll changing device and method for multi-roll mill |
| CN107309276A (en) * | 2017-07-31 | 2017-11-03 | 莱芜钢铁集团有限公司 | A kind of method for being used to change the cross bag of milling train lower drive shaft |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114700370A (en) * | 2022-03-29 | 2022-07-05 | 柳州钢铁股份有限公司 | Rapid installation method of universal coupling of heavy and medium plate mill |
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Application publication date: 20201204 |