CN111451734A - Method for quickly and safely replacing main transmission connecting rod of rolling mill - Google Patents
Method for quickly and safely replacing main transmission connecting rod of rolling mill Download PDFInfo
- Publication number
- CN111451734A CN111451734A CN202010269430.9A CN202010269430A CN111451734A CN 111451734 A CN111451734 A CN 111451734A CN 202010269430 A CN202010269430 A CN 202010269430A CN 111451734 A CN111451734 A CN 111451734A
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- China
- Prior art keywords
- connecting rod
- upper connecting
- rolling mill
- main transmission
- locking device
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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
-
- 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
- B23P19/04—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 for assembling or disassembling parts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to a method for quickly and safely replacing a main transmission connecting rod of a rolling mill in the technical field of metallurgical cold rolling, which comprises the steps of optimizing the stroke of a hydraulic cylinder of a locking device, and independently detaching a spindle head of a connecting shaft when the locking device is opened, thereby dividing the connecting rod into two parts, effectively shortening the lifting length of the connecting rod, reducing the interference in the lifting process, solving the problem of difficulty in detecting, maintaining and detaching the main transmission connecting rod of the rolling mill, reducing the potential safety hazard, shortening the operation time, reducing the fault shutdown and improving the production operation rate and the yield of steel coils.
Description
Technical Field
The invention relates to the technical field of metallurgical cold rolling, in particular to a method for quickly and safely replacing a main transmission connecting rod of a rolling mill.
Background
At present, a rolling mill of a combined unit of a cold rolling two-stage mill of a certain steel enterprise is a 5-frame rolling mill, wherein 1 and 5 frames are six-roller rolling mills, and 2 to 4 frames are four-roller rolling mills. Each frame is driven by a main transmission motor, the motor is connected with a speed reducer, and the speed reducer is connected with an upper working roll and a lower working roll through an upper universal connecting rod and a lower universal connecting rod to finish the rolling process. The rolling tension of the rolling mill is large during working, the connecting rod works in the environment of high-temperature steam and emulsion for a long time, and the working condition environment is severe, so that a fault hidden trouble point is formed, and the connecting rod is frequently required to be inspected, maintained and replaced. Because the space at this place is narrow and small, multiple pipeline and wind channel are crisscross each other, mutual interference when the rolling mill final drive connecting rod of overlength hoists, and the ground is wet and smooth, consequently, these all cause very big inconvenience for examining the maintenance, lead to examining the maintenance and change the connecting rod operating time long, the operation potential safety hazard is big, the accident down time is long, influences normal production.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention solves the technical problem of providing a method for quickly and safely replacing a main transmission connecting rod of a rolling mill.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for quickly and safely replacing a main transmission connecting rod of a rolling mill is characterized by comprising the following operation steps:
1) optimizing the stroke of a hydraulic cylinder of the locking device, opening the locking device, hoisting and fixing the upper connecting rod by using a guide chain, and removing a flange bolt of a spindle head of the connecting shaft of the upper connecting rod;
2) fixing the upper connecting rod connecting shaft head on a bearing box of the working roll by a thin steel rope, and transporting the upper working roll and the upper connecting rod connecting shaft head out by a roll changing vehicle;
3) dismounting an upper connecting rod flange bolt on the side of the speed reducer, and loosening an upper connecting rod and the speed reducer;
4) hoisting and disassembling the upper connecting rod by a crane;
5) repeating the steps 1) -4) and detaching the connecting rod;
6) otherwise, the upper and lower connecting rods and the upper connecting rod can be installed again.
Compared with the prior art, the invention has the beneficial effects that:
1) by optimizing the stroke of a hydraulic cylinder of the locking device, when the locking device is opened, the spindle head of the connecting spindle is detached independently, so that the connecting rod is divided into two parts, the lifting length of the connecting rod is effectively shortened, the interference in the lifting process is reduced, and the problem that the main transmission connecting rod of the rolling mill is difficult to repair and detach can be solved;
2) the potential safety hazard is reduced, the operation time is shortened, the fault shutdown is reduced, and the production operation rate and the yield of the steel coil are improved.
Drawings
FIG. 1 is a schematic diagram of the position structure of the upper and lower connecting rods of the main transmission of the present invention.
In the figure: 1-upper connecting rod 11-upper connecting rod spindle nose 2-lower connecting rod 22-lower connecting rod spindle nose 3-working roll 4-speed reducer
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in figure 1, the method for quickly and safely replacing the main transmission connecting rod of the rolling mill, which is related by the invention, comprises the following operation steps of optimizing the stroke of a hydraulic cylinder of a locking device, and independently detaching a spindle head of a connecting shaft when the locking device is opened, thereby dividing the connecting rod into two parts, effectively shortening the hoisting length of the connecting rod and reducing the interference in the hoisting process:
1) optimizing the stroke of a hydraulic cylinder of the locking device, opening the locking device, hoisting and fixing the upper connecting rod 1 by using a guide chain, and removing a flange bolt of an upper connecting rod connecting shaft head 11;
2) fixing the upper connecting rod connecting shaft head 11 on a bearing box of the working roll 3 by a thin steel rope, and transporting the upper working roll and the upper connecting rod connecting shaft head 11 out by a roll changing vehicle;
3) loosening a connecting flange bolt at the side of the upper connecting rod and the speed reducer 3, and loosening the connection between the upper connecting rod 1 and the speed reducer 3;
4) hoisting and disassembling the upper connecting rod 1 by a crane;
5) repeating the steps 1) -4) and detaching the connecting rod 2;
6) conversely, the upper and lower connecting rods 1 and 2 can be installed again.
[ examples ] A method for producing a compound
The length of an upper connecting rod of one of the rolling mills of the cold rolling two-division factory combined units of a certain steel enterprise is 3070mm, the length of a lower connecting rod is 3590mm, and during disassembly operation:
1) optimizing the stroke of a hydraulic cylinder of the locking device, opening the locking device, hoisting and fixing the upper connecting rod 1 by using a guide chain, and removing a flange bolt of an upper connecting rod connecting shaft head 11;
2) fixing the upper connecting rod connecting shaft head 11 on a bearing box of the working roll 3 by a thin steel rope, and transporting the upper working roll and the upper connecting rod connecting shaft head 11 out by a roll changing vehicle;
after the upper connecting rod connecting shaft head 11 is disassembled, the length of the upper connecting rod 1 is shortened to 2600mm (similarly, after the lower connecting rod connecting shaft head 22 is disassembled, the length page of the lower connecting rod 2 is shortened to 2600mm), the hoisting length of the upper connecting rod 1 is greatly shortened, the interference of the upper connecting rod with various surrounding pipelines and air channels in the hoisting process is reduced, and the hoisting is facilitated;
3) loosening a connecting flange bolt at the side of the upper connecting rod and the speed reducer 3, and loosening the connection between the upper connecting rod 1 and the speed reducer 3;
4) hoisting and disassembling the upper connecting rod 1 by a crane;
5) repeating the steps 1) -4) and detaching the connecting rod 2;
6) conversely, the upper and lower connecting rods 1 and 2 can be installed again.
Claims (1)
1. A method for quickly and safely replacing a main transmission connecting rod of a rolling mill is characterized by comprising the following operation steps:
1) optimizing the stroke of a hydraulic cylinder of the locking device, opening the locking device, hoisting and fixing the upper connecting rod by using a guide chain, and removing a flange bolt of a spindle head of the connecting shaft of the upper connecting rod;
2) fixing the upper connecting rod connecting shaft head on a bearing box of the working roll by a thin steel rope, and transporting the upper working roll and the upper connecting rod connecting shaft head out by a roll changing vehicle;
3) dismounting an upper connecting rod flange bolt on the side of the speed reducer, and loosening an upper connecting rod and the speed reducer;
4) hoisting and disassembling the upper connecting rod by a crane;
5) repeating the steps 1) -4) and detaching the connecting rod;
6) otherwise, the upper and lower connecting rods and the upper connecting rod can be installed again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010269430.9A CN111451734A (en) | 2020-04-08 | 2020-04-08 | Method for quickly and safely replacing main transmission connecting rod of rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010269430.9A CN111451734A (en) | 2020-04-08 | 2020-04-08 | Method for quickly and safely replacing main transmission connecting rod of rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111451734A true CN111451734A (en) | 2020-07-28 |
Family
ID=71674111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010269430.9A Pending CN111451734A (en) | 2020-04-08 | 2020-04-08 | Method for quickly and safely replacing main transmission connecting rod of rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111451734A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115418427A (en) * | 2022-08-31 | 2022-12-02 | 山东钢铁集团日照有限公司 | Integral replacement method for sealing valve transmission mechanism on top of blast furnace |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4547082A (en) * | 1981-07-07 | 1985-10-15 | Mannesmann Demag Wean | Bearing construction of a crankshaft of a cold Pilger rolling mill, or the like |
| CN102285581A (en) * | 2010-06-17 | 2011-12-21 | 五冶集团上海有限公司 | Special suspender to replace vertical mill universal connecting shafts and use method thereof |
| CN203526204U (en) * | 2013-09-26 | 2014-04-09 | 河北钢铁股份有限公司承德分公司 | Device for replacing rolling mill pressing head frame and pressing head |
| CN104891323A (en) * | 2015-05-13 | 2015-09-09 | 莱芜钢铁集团有限公司 | Device and method for rapid replacement of lower connecting shaft of horizontal rolling 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 |
-
2020
- 2020-04-08 CN CN202010269430.9A patent/CN111451734A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4547082A (en) * | 1981-07-07 | 1985-10-15 | Mannesmann Demag Wean | Bearing construction of a crankshaft of a cold Pilger rolling mill, or the like |
| CN102285581A (en) * | 2010-06-17 | 2011-12-21 | 五冶集团上海有限公司 | Special suspender to replace vertical mill universal connecting shafts and use method thereof |
| CN203526204U (en) * | 2013-09-26 | 2014-04-09 | 河北钢铁股份有限公司承德分公司 | Device for replacing rolling mill pressing head frame and pressing head |
| CN104891323A (en) * | 2015-05-13 | 2015-09-09 | 莱芜钢铁集团有限公司 | Device and method for rapid replacement of lower connecting shaft of horizontal rolling 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115418427A (en) * | 2022-08-31 | 2022-12-02 | 山东钢铁集团日照有限公司 | Integral replacement method for sealing valve transmission mechanism on top of blast furnace |
| CN115418427B (en) * | 2022-08-31 | 2023-07-04 | 山东钢铁集团日照有限公司 | Integral replacement method of sealing valve transmission mechanism on blast furnace top |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200728 |