CN107971346A - Cooling method and special purpose device are controlled after a kind of steel tube sizing mill finish to gauge - Google Patents
Cooling method and special purpose device are controlled after a kind of steel tube sizing mill finish to gauge Download PDFInfo
- Publication number
- CN107971346A CN107971346A CN201610938053.7A CN201610938053A CN107971346A CN 107971346 A CN107971346 A CN 107971346A CN 201610938053 A CN201610938053 A CN 201610938053A CN 107971346 A CN107971346 A CN 107971346A
- Authority
- CN
- China
- Prior art keywords
- roller
- steel pipe
- line
- revoliving arm
- sizing mill
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 98
- 239000010959 steel Substances 0.000 title claims abstract description 98
- 238000001816 cooling Methods 0.000 title claims abstract description 35
- 238000004513 sizing Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000007921 spray Substances 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 7
- 238000005452 bending Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005098 hot rolling Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
- B21B37/76—Cooling control on the run-out table
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
- B21B19/10—Finishing, e.g. smoothing, sizing, reeling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B43/00—Cooling beds, whether stationary or moving; Means specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed
- B21B43/04—Cooling beds comprising rolls or worms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B2045/0227—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
- Metal Rolling (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention discloses cooling method and special purpose device are controlled after a kind of steel tube sizing mill finish to gauge, its main feature is that second roller bed conveying line parallel with the first roller bed conveying line is set after sizing mill, steel pipe is laterally moved on the second roller line by the first roller bed conveying line by the second revoliving arm, is cooled down by water ring；After steel pipe is by the second roller line, steel pipe is laterally moved on the first roller line by the 3rd revoliving arm, then is sent to steel pipe is traversing by the first revoliving arm on cold bed；By making steel pipe, on offline roller-way top advance side, rotation is cooled down, add the cooling uniformity of steel pipe, avoid steel pipe because inhomogeneous cooling is even and caused by steel pipe bending, become ellipse etc., realize the realization of the cold technique of steel pipe control, thus improve and roll state tissue, improve steel tube performance, subsequent heat treatment production capacity is discharged, obtains preferable economic benefit.
Description
Technical field
The present invention relates to the technical field of heat treatment of steel pipe's production, specifically a kind of steel tube sizing mill end cooling control after rolling
Method and special purpose device.
Background technology
Controlled rolling and controlled cooling is to develop high intensity, the key process technology of high-ductility steel iron product, using Controlled Rolling And Controlled Cooling
As the main technique technological means for improving hot rolling steel material properties of product, Controlled Cooling Technology for Medium Plate is from the 1980's
It has been promoted and commonly used.Since especially 1998, hot rolling field of iron and steel is succeeded in developing and thrown in succession both at home and abroad
Enter to apply Ultra Fast Cooling.
Using cooling control after rolling technology, it can improve and roll state tissue, improve steel tube performance, discharge subsequent heat treatment production capacity.From
In the long term, by the application of cooling control after rolling technology, steel material potential can be excavated, realize economizing type design of alloy and
The production method of minimizing, realizes the exploitation and mass production of high-performance steel tube material at lower cost, obtains high added value
Tube product.
But in hot rolling seamless steel pipe production process, Controlled Rolling And Controlled Cooling is applied without maturation.At present on hot rolling without
Seam steel pipe has no the report of the ripe application of heavy industrialization in the research of the cold aspect of line traffic control.
The steel pipe cooling device working mechanism designed at present, referring to Fig. 1：
1）After steel pipe goes out sizing mill 1, along the first roller bed conveying line, before being transported to cold bed 5, by the revoliving arm 4 of Hui Sidun levers
It is sent to steel pipe is traversing on cold bed 5；
2）Between the first roller line 2 of above-mentioned roller bed conveying line, some groups of water rings 3 are installed, each water ring 3 is according to setting
Fixed pressure and flow, spray water to steel pipe, cooling pipe；
3）After steel pipe goes out sizing mill, temperature is generally in the range of 850 DEG C -1000 DEG C, by the water-spraying control of above-mentioned water ring 3
It is minimum to can reach less than 150 DEG C about to less than 720 DEG C.
Above device there are the problem of：Since steel pipe cannot rotate in cooling procedure, so steel pipe cools down water ring
Water is quite sensitive, and the pressure and flow slightly difference of water ring circumferential direction cooling water, will cause the inhomogeneous cooling of steel pipe even, so that
Cause tube bending, become the deformation such as ellipse.
Further, since in actual production, there is a situation where that not every steel pipe will pass through water ring and cool down, to avoid
Baking of the hot steel pipe to water ring, water ring need water flowing to cool down, can the substantial amounts of energy of additional waste.The content of the invention
The purpose of the present invention is overcoming the shortcomings of above-mentioned prior art, and cooling method is controlled after a kind of steel tube sizing mill finish to gauge is provided.
The special purpose device of control cooling method after steel tube sizing mill finish to gauge is realized in another object of the present invention offer.
Steel pipe steel pipe is easily occurred because inhomogeneous cooling is even in cooling procedure present invention mainly solves the prior art and become ellipse, curved
The problems such as bent and waste of energy.
The technical scheme is that：Cooling method is controlled after a kind of steel tube sizing mill finish to gauge, is included the following steps：
A increases by second roller bed conveying line parallel with the first roller bed conveying line after sizing mill, the second roller bed conveying line by
Second revoliving arm, the second roller line and the 3rd revoliving arm composition, each roller-way axis of the second roller line are at an angle of with roller line,
The angle adjusts in the range of 5-15 degree；
Steel pipe is laterally moved on the second roller line by b by the first roller bed conveying line by the second revoliving arm, the structure of the second revoliving arm
Using Hui Sidun lever forms, realize that steel pipe is handled gently；
C steel pipes between the roller-way of the second roller line, install N group water rings, each circumferential steel pipe of water spray by the second roller line
Water spray, cooling pipe；After steel pipe goes out sizing mill, temperature arrives in the range of 850 DEG C -1000 DEG C by the water-spraying control of water ring
It is less than 720 DEG C, minimum to reach less than 150 DEG C；During roller-way after the water ring that steel pipe passes through the second roller line, its roller-way height according to
Secondary decline, steel pipe descending operation, contributes to steel duct residual water to flow out；
After d steel pipes are by the second roller line, steel pipe is laterally moved on the first roller line by the 3rd revoliving arm, the 3rd revoliving arm is adopted
With Hui Sidun lever forms, realize that steel pipe is handled gently；
Steel pipes of the e on the first roller line is sent to steel pipe is traversing on cold bed by the first revoliving arm, the structure of the first revoliving arm
Using Hui Sidun lever forms.
The special purpose device of cooling method, including sizing mill, the first roller bed conveying line are controlled after the steel tube sizing mill finish to gauge of the present invention
And cold bed, the first roller bed conveying line is set between sizing mill and cold bed；First roller bed conveying line is turned round by the first roller line and first
Arm forms；Second roller bed conveying line parallel with the first roller bed conveying line, the second roller bed conveying line are set after the sizing mill
It is made of the second revoliving arm, the second roller line and the 3rd revoliving arm；Each roller-way axis of second roller line and roller line angulation
Degree, the angle adjust in the range of 5-15 degree；Between the adjacent roller-way of the second roller line, N group water rings are installed, N is just whole
Number.
Further, first revoliving arm, the second revoliving arm and the 3rd revoliving arm are even using Hui Sidun lever forms.
Further, the roller-way height after the water ring of second roller line declines successively.
Compared with the prior art cooling method and special purpose device are controlled after a kind of steel tube sizing mill finish to gauge of the present invention to be had
Prominent substantive distinguishing features and marked improvement：1st, a roller bed conveying line parallel with former roller bed conveying line is newly increased, makes steel pipe
Cold offline progress is controlled, adds the flexibility of organization of production；2nd, the roller-way axis of newly-increased roller bed conveying line and steel pipe advance side
Have a certain degree to shape, steel pipe is rotated in advance, and steel pipe cooling is more uniform, avoids steel pipe and is made because inhomogeneous cooling is even
Bending into steel pipe, become ellipse etc.；3rd, roller-way after the steel pipe water ring of newly-increased roller bed conveying line, its roller-way height decline successively,
Steel pipe descending is run, and contributes to steel duct residual water to flow out；4th, the realization of the cold technique of steel pipe control is realized, is thus improved
Roll state tissue, improve steel tube performance；At the same time by the application of cooling control after rolling technology, steel material potential is excavated, realizes economizing type
Design of alloy and minimizing production method, realize that the exploitation of high-performance steel tube material is raw with high-volume at lower cost
Production, obtains preferable economic benefit.
Brief description of the drawings
Fig. 1 is the structure diagram of existing steel pipe cooling device；
Fig. 2 is the structure diagram of the steel pipe cooling special purpose device of the present invention.
Embodiment
For a better understanding and implementation, providing specific embodiment below in conjunction with the accompanying drawings, the present invention will be described in detail；Lift real
Apply example to be only used for explaining the present invention, be not intended to limit the scope of the present invention.
Embodiment 1, referring to Fig. 2, using existing sizing mill 1, the first roller bed conveying line and cold bed 5, the conveying of the first roller-way
Line is made of the first roller line 2 and the first revoliving arm 4；Second parallel with the first roller bed conveying line is installed after sizing mill 1
Roller bed conveying line, the second roller bed conveying line are made of the second revoliving arm 6, the second roller line 7 and the 3rd revoliving arm 8；Second roller-way
Each roller-way axis of line 7 is at an angle of with roller line, which adjusts in the range of 5-15 degree；It is adjacent in the second roller line 7
Between roller-way, installation N groups water ring 9, N is positive integer；Control cold-zone outlet roller-way height after the water ring 9 of second roller line 7
Decline successively；First revoliving arm 4, the second revoliving arm 6 and the 3rd revoliving arm 8 are even using Hui Sidun lever forms.
Using above-mentioned steel pipe cooling device, cooling method is controlled after steel tube sizing mill finish to gauge, is included the following steps：
A increases by second roller bed conveying line parallel with the first roller bed conveying line after sizing mill, the second roller bed conveying line by
Second revoliving arm, the second roller line and the 3rd revoliving arm composition, each roller-way axis of the second roller line are at an angle of with roller line,
The angle adjusts in the range of 5-15 degree；
Steel pipe is laterally moved on the second roller line by b by the first roller bed conveying line by the second revoliving arm, the structure of the second revoliving arm
Using Hui Sidun lever forms, realize that steel pipe is handled gently；
C steel pipes between the roller-way of the second roller line, install some groups of water rings, each water spray is circumferential by the second roller line
Steel pipe is sprayed water, cooling pipe；After steel pipe goes out sizing mill, temperature is cold by the water spray of water ring in the range of 850 DEG C -1000 DEG C
But it is minimum to reach less than 150 DEG C to less than 720 DEG C；Steel pipe is by the way that during roller-way, its roller-way is high after the second roller bed conveying line water ring
Degree declines successively, and the operation of steel pipe descending, contributes to steel duct residual water to flow out；
After d steel pipes are by the second roller line, steel pipe is laterally moved on the first roller line by the 3rd revoliving arm, the 3rd revoliving arm is adopted
With Hui Sidun lever forms, realize that steel pipe is handled gently；
Steel pipes of the e on the first roller line is sent to steel pipe is traversing on cold bed by the first revoliving arm, the structure of the first revoliving arm
Using Hui Sidun lever forms.
Claims (4)
1. control cooling method after a kind of steel tube sizing mill finish to gauge, it is characterised in that include the following steps：
A increases by second roller bed conveying line parallel with the first roller bed conveying line after sizing mill, the second roller bed conveying line by
Second revoliving arm, the second roller line and the 3rd revoliving arm composition, each roller-way axis of the second roller line are at an angle of with roller line,
The angle adjusts in the range of 5-15 degree；
Steel pipe is laterally moved on the second roller line by b by the first roller bed conveying line by the second revoliving arm, the structure of the second revoliving arm
Using Hui Sidun lever forms, realize that steel pipe is handled gently；
C steel pipes between the roller-way of the second roller line, install N group water rings, each circumferential steel pipe of water spray by the second roller line
Water spray, cooling pipe；After steel pipe goes out sizing mill, temperature arrives in the range of 850 DEG C -1000 DEG C by the water-spraying control of water ring
It is less than 720 DEG C, minimum to reach less than 150 DEG C；During roller-way after the water ring that steel pipe passes through the second roller line, its roller-way height according to
Secondary decline, steel pipe descending operation, contributes to steel duct residual water to flow out；
After d steel pipes are by the second roller line, steel pipe is laterally moved on the first roller line by the 3rd revoliving arm, the 3rd revoliving arm is adopted
With Hui Sidun lever forms, realize that steel pipe is handled gently；
Steel pipes of the e on the first roller line is sent to steel pipe is traversing on cold bed by the first revoliving arm, the structure of the first revoliving arm
Using Hui Sidun lever forms.
2. the special purpose device of cooling method is controlled after realizing the steel tube sizing mill finish to gauge of claim 1, including sizing mill（1）, the first roller
Road pipeline and cold bed（5）, sizing mill（1）And cold bed（5）Between set the first roller bed conveying line；First roller bed conveying line is by first
Roller line（2）With the first revoliving arm（4）Composition；It is characterized in that, the sizing mill（1）Set afterwards and the first roller bed conveying line
The second parallel roller bed conveying line, the second roller bed conveying line is by the second revoliving arm（6）, the second roller line（7）With the 3rd revoliving arm
（8）Composition；Second roller line（7）Each roller-way axis be at an angle of with roller line, the angle 5-15 degree in the range of adjust；
In the second roller line（7）Between adjacent roller-way, N group water rings are installed（9）, N is positive integer.
3. special purpose device according to claim 2, it is characterised in that first revoliving arm（4）, the second revoliving arm
（6）With the 3rd revoliving arm（8）Use Hui Sidun lever forms.
4. special purpose device according to claim 2, it is characterised in that second roller line（7）Water ring（9）Afterwards
Roller-way height decline successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610938053.7A CN107971346B (en) | 2016-10-25 | 2016-10-25 | Controlled cooling method and special device for steel pipe sizing mill after finish rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610938053.7A CN107971346B (en) | 2016-10-25 | 2016-10-25 | Controlled cooling method and special device for steel pipe sizing mill after finish rolling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107971346A true CN107971346A (en) | 2018-05-01 |
| CN107971346B CN107971346B (en) | 2020-03-27 |
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| CN201610938053.7A Active CN107971346B (en) | 2016-10-25 | 2016-10-25 | Controlled cooling method and special device for steel pipe sizing mill after finish rolling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508625A (en) * | 2019-10-17 | 2019-11-29 | 东北大学 | On-line Control cooling device and method for middle small-caliber hot rolling seamless steel |
| CN111589880A (en) * | 2020-04-29 | 2020-08-28 | 东北大学 | Control method for improving structure uniformity of on-line cooling process of medium-thickness wall seamless steel pipe |
| CN111589879A (en) * | 2020-04-29 | 2020-08-28 | 东北大学 | Control method for improving texture uniformity of thick-wall seamless steel tube online cooling process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5939407A (en) * | 1982-08-31 | 1984-03-03 | Kawasaki Steel Corp | Production of seamless steel pipe |
| CN86103933A (en) * | 1986-06-12 | 1987-09-23 | 冶金工业部钢铁研究总院 | Hot finished steel pipe Heat Treatment and refrigerating unit thereof |
| CN2719857Y (en) * | 2004-07-29 | 2005-08-24 | 宝山钢铁股份有限公司 | Tilting step drainage apparatus |
| CN2866519Y (en) * | 2005-11-29 | 2007-02-07 | 宝山钢铁股份有限公司 | Steel pipe water quenching heat treatment device |
| CN101157096A (en) * | 2007-11-16 | 2008-04-09 | 天津钢管集团股份有限公司 | Technique of controlling and cooling hot-rolled seamless tube online |
| CN101497936A (en) * | 2009-03-12 | 2009-08-05 | 上海交通大学 | On-line and off-line combined quenching refrigerating device after steel rolling |
| CN102755993A (en) * | 2012-07-24 | 2012-10-31 | 太原重工股份有限公司 | Device and method for circulating jacking rod of puncher |
-
2016
- 2016-10-25 CN CN201610938053.7A patent/CN107971346B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5939407A (en) * | 1982-08-31 | 1984-03-03 | Kawasaki Steel Corp | Production of seamless steel pipe |
| CN86103933A (en) * | 1986-06-12 | 1987-09-23 | 冶金工业部钢铁研究总院 | Hot finished steel pipe Heat Treatment and refrigerating unit thereof |
| CN2719857Y (en) * | 2004-07-29 | 2005-08-24 | 宝山钢铁股份有限公司 | Tilting step drainage apparatus |
| CN2866519Y (en) * | 2005-11-29 | 2007-02-07 | 宝山钢铁股份有限公司 | Steel pipe water quenching heat treatment device |
| CN101157096A (en) * | 2007-11-16 | 2008-04-09 | 天津钢管集团股份有限公司 | Technique of controlling and cooling hot-rolled seamless tube online |
| CN101497936A (en) * | 2009-03-12 | 2009-08-05 | 上海交通大学 | On-line and off-line combined quenching refrigerating device after steel rolling |
| CN102755993A (en) * | 2012-07-24 | 2012-10-31 | 太原重工股份有限公司 | Device and method for circulating jacking rod of puncher |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508625A (en) * | 2019-10-17 | 2019-11-29 | 东北大学 | On-line Control cooling device and method for middle small-caliber hot rolling seamless steel |
| CN111589880A (en) * | 2020-04-29 | 2020-08-28 | 东北大学 | Control method for improving structure uniformity of on-line cooling process of medium-thickness wall seamless steel pipe |
| CN111589879A (en) * | 2020-04-29 | 2020-08-28 | 东北大学 | Control method for improving texture uniformity of thick-wall seamless steel tube online cooling process |
| CN111589879B (en) * | 2020-04-29 | 2021-06-11 | 东北大学 | Control method for improving texture uniformity of thick-wall seamless steel tube online cooling process |
| CN111589880B (en) * | 2020-04-29 | 2021-09-28 | 东北大学 | Control method for improving structure uniformity of on-line cooling process of medium-thickness wall seamless steel pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107971346B (en) | 2020-03-27 |
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