CN103433294B - Method for preventing slab from slipping at inlet of fixed width machine - Google Patents
Method for preventing slab from slipping at inlet of fixed width machine Download PDFInfo
- Publication number
- CN103433294B CN103433294B CN201310354406.5A CN201310354406A CN103433294B CN 103433294 B CN103433294 B CN 103433294B CN 201310354406 A CN201310354406 A CN 201310354406A CN 103433294 B CN103433294 B CN 103433294B
- Authority
- CN
- China
- Prior art keywords
- pinch roll
- slab
- constant width
- width machine
- absolute altitude
- Prior art date
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005098 hot rolling Methods 0.000 abstract description 7
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003079 width control Methods 0.000 description 1
Landscapes
- Metal Rolling (AREA)
Abstract
The invention provides a method for preventing a slab from slipping at an inlet of a fixed width machine, and relates to the technical field of hot rolling. The method comprises the following steps: measuring the elevation values of an inlet roller way and an inlet lower pinch roller of the width determining machine under the condition of the same base point to obtain an elevation difference; when the elevation value of the inlet lower pinch roll is smaller than the elevation value of the inlet roller way of the width fixing machine, selecting a gasket with preset thickness according to the elevation difference, installing the gasket below a bearing seat of the inlet lower pinch roll, and measuring the elevation value again; and when the difference value between the elevation values is smaller than the target elevation preset value, reselecting the gaskets with different preset thicknesses. According to the invention, by improving the elevation value of the inlet lower pinch roll, after the tapped slab enters the inlet lower pinch roll of the width fixing machine, even if the tapped part is lapped on the inlet lower guide roll of the width fixing machine and then the slab is arched, the inlet lower pinch roll of the width fixing machine and the slab can be kept in contact, so that the tapped slab can be effectively prevented from slipping at the inlet lower pinch roll of the width fixing machine.
Description
Technical field
The present invention relates to hot rolling technique field, particularly a kind of method preventing slab from skidding at constant width machine entrance.
Background technology
Constant width machine is the main wide equipment of tune of hot rolling line.Slab caster changes width of plate slab more complicated, and the large pressure ability of constant width machine can meet the needs of hot-strip different in width specification.Coming into operation of constant width machine can not only improve continuous casting production efficiency greatly, and edger roll can be avoided to depress protruding " dog bone " defect, makes constant width machine more and more extensive in the application of hot rolling line.
At present, by continuous casting process, the impact of that slab storehouse is stacked is improper, the heating furnace upper and lower surface temperature difference is large etc. many factors, the slab entering constant width machine is caused to there is the problem of kowtowing.Constant width machine entrance pinch roll is live-roller, and guide roller is free roll.Because slab is kowtowed, therefore slab is after entering constant width machine entrance bottom pinch roll, and the place of kowtowing rides on entrance lower steering roll, and slab arches upward, and causes entrance bottom pinch roll to contact with slab unreal, thus causes slab to skid at pinch roll place under the inlet.This phenomenon is comparatively general in the application of constant width machine equipment, and slab skids and easily makes the tracking of basic automatization to slab inaccurate, and constant width machine short stroke executing location is inaccurate, finally causes band steel finished product to occur width problem.Width is very important parameter in band steel appearance and size, and strip width control accuracy reflects the product quality of an iron and steel enterprise.Therefore, it is key technology in hot rolling line production process that the slab that prevents from kowtowing skids at constant width machine entrance, needs a kind of method that slab that effectively prevents from kowtowing skids at constant width machine entrance.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of method that slab that prevents from kowtowing skids at constant width machine entrance, do not need to be equipped with special equipment and instrument, transformation is carried out to existing equipment and just effectively can solve slab of kowtowing at constant width machine entrance slippage problems.
The invention provides a kind of method preventing slab from skidding at constant width machine entrance, comprising:
Measure the absolute altitude value of constant width machine inlet roller way and entrance bottom pinch roll in same basic point situation, each roller absolute altitude value measured is made difference and calculates, obtain elevation difference; When the absolute altitude value of entrance bottom pinch roll is less than the absolute altitude value of constant width machine inlet roller way, the pad of preset thickness is chosen according to described elevation difference, and below the bearing block pad of described preset thickness being installed to entrance bottom pinch roll, again measure the absolute altitude value of constant width machine inlet roller way and entrance bottom pinch roll; When difference between the absolute altitude value and the absolute altitude value of constant width machine inlet roller way of entrance bottom pinch roll is less than target absolute altitude preset value, again choose the pad of different preset thickness.
The reason that the present invention is skidded at constant width machine entrance by analyzing slab of kowtowing, measure constant width machine inlet roller way, entrance bottom pinch roll absolute altitude, improve entrance bottom pinch roll absolute altitude, make after slab of kowtowing enters the entrance bottom pinch roll of constant width machine, even if the place of kowtowing rides over slab after on constant width machine entrance lower steering roll and arches upward, the entrance bottom pinch roll of constant width machine and slab also can keep in touch, there will not be the unreal problem of contact, thus the slab that can effectively prevent from kowtowing skids at the entrance bottom pinch roll place of constant width machine.
Accompanying drawing explanation
The method flow diagram preventing slab from skidding at constant width machine entrance that Fig. 1 provides for the embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
The reason that the embodiment of the present invention is skidded at constant width machine entrance by analyzing slab of kowtowing, measure constant width machine inlet roller way, entrance bottom pinch roll absolute altitude, improve entrance bottom pinch roll absolute altitude, make after slab of kowtowing enters the entrance bottom pinch roll of constant width machine, even if the place of kowtowing rides over slab after on constant width machine entrance lower steering roll and arches upward, the entrance bottom pinch roll of constant width machine and slab also can keep in touch, there will not be the unreal problem of contact, thus the slab that can effectively prevent from kowtowing skids at the entrance bottom pinch roll place of constant width machine.
The method flow diagram preventing slab from skidding at constant width machine entrance that Fig. 1 provides for the embodiment of the present invention, comprises the following steps:
Step 101, utilize N3 spirit level (certainty of measurement is 0.01mm) to measure the absolute altitude value of constant width machine inlet roller way and entrance bottom pinch roll in same basic point situation, make difference according to each roller absolute altitude value measured and calculate elevation difference, judge absolute altitude extent.Such as, calculated by measurement data and learn, entrance bottom pinch roll absolute altitude value 0.5mm less of constant width machine inlet roller way absolute altitude value.Wherein, elevation difference is because the wearing and tearing difference of slab to constant width machine inlet roller way, entrance bottom pinch roll causes.
Step 102, unclamp the bearing block foundation bolt of entrance bottom pinch roll, to sling roller with jack, choose the pad that 2mm is thick, and pad thick for 2mm is installed to below bearing block, fastener shaft bearing foundation bolt.The spacer thickness chosen should be more than or equal to elevation difference (0.5mm) and target absolute altitude preset value (the present embodiment is defined as 1.5mm according to practical condition) sum, and wherein elevation difference is used for the absolute altitude value of compensate for wear.
Step 103, again N3 spirit level is utilized to measure the absolute altitude value of constant width machine inlet roller way and entrance bottom pinch roll, entrance bottom pinch roll absolute altitude value 1.5mm larger than constant width machine inlet roller way absolute altitude value.
In addition, for compensating the uneven wear of slab pair roller, the absolute altitude of periodic measurement constant width machine inlet roller way and entrance bottom pinch roll is needed, compensate for wear elevation difference.
This enforcement is after raising entrance bottom pinch roll absolute altitude value, when slab of kowtowing enters the entrance bottom pinch roll of constant width machine, even if the place of kowtowing rides over slab after on constant width machine entrance lower steering roll and arches upward, the entrance bottom pinch roll of constant width machine and slab also can keep in touch, there will not be the unreal problem of contact, thus the slab that effectively prevents from kowtowing skids at the entrance bottom pinch roll place of constant width machine.
Below by a typical application example, set forth the technical scheme of the present embodiment further: be in the X80 production of 1600mm at certain 2250 hot rolling line width, in order to prevent from kowtowing, slab skids at constant width machine entrance, constant width machine bottom pinch roll absolute altitude value is brought up to 2mm, make after slab of kowtowing enters constant width machine entrance pinch roll, even if the place of kowtowing rides over slab after on constant width machine entrance lower steering roll and arches upward, constant width machine entrance bottom pinch roll and slab still can keep in touch, thus effectively prevent slab of kowtowing and skid at constant width machine entrance pinch roll place.Table 1 is slab skidding number of times record in 10 batch productions of this application example:
Table 1
As can be seen from Table 1, adopt the method for the embodiment of the present invention to efficiently avoid slab of kowtowing at constant width machine entrance slippage problems, the stable high-quality for hot rolling line is produced and is provided reliable guarantee.
In a word, the foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (3)
1. the method preventing slab from skidding at constant width machine entrance, is characterized in that, comprise
Measure the absolute altitude value of constant width machine inlet roller way and entrance bottom pinch roll in same basic point situation, each roller absolute altitude value measured is made difference and calculates, obtain elevation difference; When the absolute altitude value of entrance bottom pinch roll is less than the absolute altitude value of constant width machine inlet roller way, the pad of preset thickness is chosen according to described elevation difference, and below the bearing block pad of described preset thickness being installed to entrance bottom pinch roll, again measure the absolute altitude value of constant width machine inlet roller way and entrance bottom pinch roll; When difference between the absolute altitude value and the absolute altitude value of constant width machine inlet roller way of entrance bottom pinch roll is less than target absolute altitude preset value, again choose the pad of different preset thickness.
2. the method preventing slab from skidding at constant width machine entrance according to claim 1, is characterized in that, the step below the bearing block that the described pad by preset thickness is installed to entrance bottom pinch roll specifically comprises:
Unclamp the bearing block foundation bolt of entrance bottom pinch roll, to sling roller with jack, the pad of preset thickness is installed to below described bearing block, fastener shaft bearing foundation bolt.
3. the method preventing slab from skidding at constant width machine entrance according to claim 2, is characterized in that, described target absolute altitude preset value is 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310354406.5A CN103433294B (en) | 2013-08-14 | 2013-08-14 | Method for preventing slab from slipping at inlet of fixed width machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310354406.5A CN103433294B (en) | 2013-08-14 | 2013-08-14 | Method for preventing slab from slipping at inlet of fixed width machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103433294A CN103433294A (en) | 2013-12-11 |
| CN103433294B true CN103433294B (en) | 2015-07-08 |
Family
ID=49687059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310354406.5A Active CN103433294B (en) | 2013-08-14 | 2013-08-14 | Method for preventing slab from slipping at inlet of fixed width machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103433294B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159717B (en) * | 2017-06-09 | 2019-04-12 | 首钢京唐钢铁联合有限责任公司 | Control method of width fixing machine |
| CN108817098B (en) * | 2018-04-26 | 2020-02-21 | 首钢京唐钢铁联合有限责任公司 | Hot rolling process control method and device |
| CN113798928B (en) * | 2020-06-16 | 2023-01-20 | 上海梅山钢铁股份有限公司 | Working roller grinding method for preventing four-roller roughing mill from slipping |
| CN113877968B (en) * | 2020-07-01 | 2023-12-12 | 宝山钢铁股份有限公司 | Method for preventing slipping of width-fixing machine |
| CN112676359B (en) * | 2020-11-20 | 2022-12-13 | 首钢京唐钢铁联合有限责任公司 | Method and device for preventing discharged plate blank from slipping |
| CN112742867B (en) * | 2021-01-30 | 2023-06-13 | 宝钢湛江钢铁有限公司 | Method for enabling SSP pinch roll to roll normally after slipping |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5636301A (en) * | 1979-08-31 | 1981-04-09 | Kawasaki Steel Corp | Rolling method for reducing thickness deviation of sheet |
| JPH07124619A (en) * | 1993-11-01 | 1995-05-16 | Kobe Steel Ltd | Method for controlling fixed length of variable thickness part for differential thickness steel plate |
| CN101745547A (en) * | 2008-12-18 | 2010-06-23 | 宝山钢铁股份有限公司 | Automatic slippage control method suitable for rolling process of rough rolling |
| CN102189102A (en) * | 2010-03-09 | 2011-09-21 | 中冶东方工程技术有限公司上海分公司 | Method for rolling liquid core under heavy reduction rate by virtue of online thickness regulating roll by utilizing continuous casting machine |
-
2013
- 2013-08-14 CN CN201310354406.5A patent/CN103433294B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5636301A (en) * | 1979-08-31 | 1981-04-09 | Kawasaki Steel Corp | Rolling method for reducing thickness deviation of sheet |
| JPH07124619A (en) * | 1993-11-01 | 1995-05-16 | Kobe Steel Ltd | Method for controlling fixed length of variable thickness part for differential thickness steel plate |
| CN101745547A (en) * | 2008-12-18 | 2010-06-23 | 宝山钢铁股份有限公司 | Automatic slippage control method suitable for rolling process of rough rolling |
| CN102189102A (en) * | 2010-03-09 | 2011-09-21 | 中冶东方工程技术有限公司上海分公司 | Method for rolling liquid core under heavy reduction rate by virtue of online thickness regulating roll by utilizing continuous casting machine |
Non-Patent Citations (1)
| Title |
|---|
| 滚切式双边剪钢板跑偏原因及对策;梁立辉;《酒钢科技》;20120915(第3期);第249页-第252页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103433294A (en) | 2013-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103433294B (en) | Method for preventing slab from slipping at inlet of fixed width machine | |
| CN101811140B (en) | Method for width measurement and centering of rough rolling slab in hot rolling mill | |
| CN103464471B (en) | Automatic gauge control (AGC) self-adaptive control method for hot rolling mill | |
| CN104484560A (en) | Strip steel deviation predicting method suitable for continuous annealing unit | |
| CN102371279A (en) | Adaptive control method for increasing thickness precision of finish-rolled band steel by utilizing roll gap | |
| CN101417292B (en) | Method for controlling middle, low grade electric steel rolling using conventional rolling model | |
| CN103586288B (en) | The case library method for building up of Flatness of Hot Rolled Strip | |
| CN104028559B (en) | Method for controlling width fluctuation of strip steel | |
| CN102564644A (en) | Temperature online measuring method for plate blank in production process of heating furnace | |
| CN105251778A (en) | Feedback control method for edge thinning of single-taper working roll shifting rolling mill | |
| CN106914494B (en) | The plat control system and method for hot-strip | |
| CN103611730B (en) | For improving the method for hot continuous rolling new varieties first coil size Control precision | |
| KR101298763B1 (en) | System for measuring slab size | |
| KR101767810B1 (en) | Plate thickness controller for rolling machine | |
| CN105184652A (en) | Road engineering carbon emission analysis system | |
| Tang et al. | Non‐uniform thermal behavior and shell growth within mould for wide and thick slab continuous casting | |
| US20140068957A1 (en) | Apparatus for measuring the shape of a material | |
| CN105290116A (en) | Method for controlling transverse rolling width and longitudinal rolling width of moderately-thick plate | |
| CN104028561A (en) | Method for guaranteeing final-cooling temperature precision for steel plates | |
| CN114453434A (en) | Control method and device for pinch roll | |
| CN105195523A (en) | Method for improving calculation precision of temperature of intermediate billet in hot rolling | |
| CN113600614A (en) | Method, device, medium and equipment for adjusting precision of pinch roll rocker arm | |
| CN102896183A (en) | Method for judging whether hot-rolled steel coil is in place by coil touch of coil unloading trolley | |
| CN103191927B (en) | A kind of computational methods predicting temperature field of cold-roll strip steel | |
| CN104819673A (en) | Coiled steel strip weight measuring and calculating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |