CN113714299B - Rolling mill roller cooling method - Google Patents
Rolling mill roller cooling method Download PDFInfo
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- CN113714299B CN113714299B CN202111001892.3A CN202111001892A CN113714299B CN 113714299 B CN113714299 B CN 113714299B CN 202111001892 A CN202111001892 A CN 202111001892A CN 113714299 B CN113714299 B CN 113714299B
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- 238000005096 rolling process Methods 0.000 title claims abstract description 144
- 238000001816 cooling Methods 0.000 title claims abstract description 22
- 239000000498 cooling water Substances 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 25
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000001788 irregular Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 239000010936 titanium Substances 0.000 description 29
- 229910052719 titanium Inorganic materials 0.000 description 29
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 26
- 229910001069 Ti alloy Inorganic materials 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention relates to the field of rolling mill roll cooling, in particular to a rolling mill roll cooling method which ensures the temperature uniformity, roll convexity and roll shape stability of a working roll in the whole rolling process, thereby greatly improving the defect of irregular deviation of a strip blank in the rolling process, rolling is carried out through a 5-pass process of a single roughing mill, and the cooling water quantity of the working roll of a roughing mill frame is defined as Qm 3 And/h, defining the initial total length of the strip blank as L, wherein in the 5-pass rolling process of the rolling mill, the flow of the cooling water of the roller of the rolling gap of each pass is 20% qm 3 /h‑30％Qm 3 And (3) controlling constant flow rate, wherein the control process of the cooling water of the roughing mill roller is as follows: a. rolling a first pass; b. rolling for the second pass; c. rolling for the third pass; d. rolling for the fourth pass; e. and rolling for the fifth pass. The invention has good practical effect, can be popularized and applied in similar rolling products such as medium plates, steckel mills and the like, and has mature process technology, convenient and reliable implementation and application and good reproduction and reproducibility. The invention is especially suitable for the field of rolling mill roller cooling technology.
Description
Technical Field
The invention relates to the field of rolling mill roller cooling, in particular to a rolling mill roller cooling method.
Background
The key link of titanium and titanium metal coil production is hot rolling, and mature production experience at home and abroad is to use a hot continuous rolling or steckel mill to carry out high-efficiency and high-quality production of large-volume heavy titanium and titanium alloy coils in a steel-titanium collinear production mode. Wherein, the hot continuous rolling production mode is the most advanced, the product quality and the technical content are also the highest, but the production difficulty is also the greatest. At present, only a few countries in the world master the hot continuous rolling production technology of titanium and titanium alloy coils.
The general process flow for producing titanium and titanium alloy coils by steel-titanium collinearly comprises the following steps: titanium (titanium alloy) blank, heating by a walking beam type heating furnace, rough rolling, flying shearing of a head and a tail, finish rolling by a finishing mill group, cooling, coiling by a coiling machine, coiling titanium and titanium alloy, and warehousing. In general, a roughing train of a hot continuous rolling line is composed of one stand E1R1 or two stands (E1R 1, E2R 2). In the rolling process, a rough rolling unit rolls titanium and titanium alloy blanks with certain thickness (160-200 mm) through a plurality of passes, and intermediate strip blanks with 30-50mm, regular appearance and good size are rolled and sent to a subsequent finishing mill unit for further thinning rolling. The roughing mill is a key link of 'up-down' and the rolling stability and the quality of the rolled strip directly influence the rolling and quality control of the next working procedure. In the rough rolling process of a specific titanium and titanium alloy blank, due to the characteristics of materials and processes, a rough rolling machine E2R2 (a 2-frame rolling machine configuration mode) is generally adopted for carrying out 5-pass reversible rolling. The cold water of the rolling mill roller reduces the surface temperature of the roller, ensures the stable thermal convexity of the roller in the rolling process, improves the rolling stability and the like. However, because the rolling temperature of the titanium and titanium alloy strip blanks is low, the rolling rhythm is slow (compared with steel rolling), the blank is relatively small, the pure rolling time is short, theoretical and practical researches show that a constant large-flow cooling cold mode of original rolling of the rollers is adopted, so that the thermal convexity of the rollers is unstable in the rolling process of the titanium and titanium alloy, irregular deviation occurs in the strip blanks in the rolling process, different degrees of camber defects are generated, 79.59% of rolled titanium strip blanks have more serious deviation, the maximum deviation reaches more than 80mm, the intermediate strip blanks with bad shapes enter a finishing mill group, the defects are further amplified, and the rolling state and quality control of the finish rolling are seriously affected: the head and tail camber plate-shaped defects of the titanium belt are generated, and typical surface defects of titanium and titanium alloy belt coils, even the rolling rot and rolling waste are generated due to unstable rolling process and rolling mill guide scraping.
Disclosure of Invention
The invention aims to solve the technical problem of providing a rolling mill roller cooling method which ensures the temperature uniformity and the roller convexity and the roller shape stability of a working roller in the whole rolling process, thereby greatly improving the defect of irregular deviation of a strip blank in the rolling process.
The technical scheme adopted for solving the technical problems is as follows: the rolling mill roll cooling method is to roll through a 5-pass process of a single roughing mill, and define the cooling water quantity of the working rolls of a roughing mill frame as Qm 3 And/h, defining the initial total length of the strip blank as L, wherein in the 5-pass rolling process of the rolling mill, the flow of the cooling water of the roller of the rolling gap of each pass is 20% qm 3 /h-30％Qm 3 And (3) controlling constant flow rate, wherein the control process of the cooling water of the roughing mill roller is as follows: a. rolling for the first time: the cooling water of the roller is not started when the head part of the strip blank is rolled; in the process of rolling 1/4L1-3/4L1 section of the strip blank, the flow of the cooling water of the roller is increased to 40% qm from 0 equal proportion 3 /h; in the process of rolling the later 1/4L1 section of the strip blank, the flow rate is 40 percent qm 3 And (3) performing constant control, wherein L1 is the total length of the first pass of rolling; b. rolling the second pass: the flow rate of the cooling water of the roller is 20 percent Qm when the head part of the strip blank is rolled 3 Constant control of/h; during the process of rolling 1/4L2-3/4L2 section of the strip blank, the flow of the cooling water of the roller is 20 percent qm 3 The ratio of/h is increased to 50% Qm in equal proportion 3 /h; the flow rate of the last 1/4L2 section of the rolled strip is 50 percent qm 3 And (3) performing constant control, wherein L2 is the total length in the second pass of rolling; c. rolling for the third time: the flow rate of the cooling water of the roller is 30% qm when rolling the head part of the strip blank 3 Constant control of/h; during the 1/3L3-3/4L3 section of the rolled strip, the flow of the cooling water of the roller is 30 percent qm 3 The ratio of/h is increased to 60% qm 3 /h; the flow is constantly controlled according to 60 percent Q in the later 1/4L3 section of the rolled strip blank, wherein L3 is the total length in the third pass of rolling; d. rolling the fourth pass: the flow rate of the cooling water of the roller is 50 percent qm when the head part of the strip blank is rolled by 8-10m 3 Constant control of/h; the flow rate in the subsequent rolling process is 50% qm 3 The ratio of/h is increased to 60% qm 3 /h, and is constantly controlled to 60% qm 3 Flow rate of/h until the rolling of the pass is completed; e. rolling the fifth pass: the flow rate of the cooling water of the roller is 50 percent qm when the head part of the strip blank is rolled by 5-8m 3 Constant control of/h; the flow rate in the subsequent rolling process is 50% qm 3 The ratio of/h is increased to 60% qm 3 /h, and constantControlled to 60% qm 3 And/h flow rate until the rolling of the pass is completed.
Further, in step a, the length of the head portion of the rolled strip is 1/4 of the total length L1.
Further, in step b, the length of the head portion of the rolled strip is 1/4 of the total length L2.
Further, in step c, the length of the head portion of the rolled strip is 1/4 of the total length L3.
Further, the roughing mill has a rolling speed in the range of 3.5-4.5m/s.
Further, the cooling water system of the working rolls of the roughing mill comprises a flowmeter and a flow regulating valve control device.
The beneficial effects of the invention are as follows: the invention combines the technical characteristics of hot continuous rolling of rough rolling titanium and titanium alloy strip blanks under the condition of a steel-titanium collinear mode and the key common technical problems existing in the rolling process, and provides a unique rolling mill working roll cooling process in the titanium and titanium alloy rough rolling process, which ensures the uniformity of the temperature of the working roll and the stability of the roll convexity and the roll shape in the whole rolling process, thereby greatly improving the irregular deviation defect of the strip blank in the rolling process, effectively improving the deviation sickle bend defect of the titanium strip blank rolling and improving the product quality. The invention has the advantages of low investment cost, good practical effect, mature process technology, convenient and reliable implementation and application and good reproducibility, and can be popularized and applied to similar rolling products such as medium plates, steckel mills and the like. The invention is especially suitable for the field of rolling mill roller cooling technology.
Detailed Description
The rolling mill roll cooling method is to roll through a 5-pass process of a single roughing mill, and define the cooling water quantity of the working rolls of a roughing mill frame as Qm 3 And/h, defining the initial total length of the strip blank as L, wherein in the 5-pass rolling process of the rolling mill, the flow of the cooling water of the roller of the rolling gap of each pass is 20% qm 3 /h-30％Qm 3 And (3) controlling constant flow rate, wherein the control process of the cooling water of the roughing mill roller is as follows: a. rolling for the first time: the cooling water of the roller is not started when the head part of the strip blank is rolled; 1 of rolled stripIn the process of/4L 1-3/4L1 section, the flow of the cooling water of the roller is increased to 40% qm from 0 equal proportion 3 /h; in the process of rolling the later 1/4L1 section of the strip blank, the flow rate is 40 percent qm 3 And (3) performing constant control, wherein L1 is the total length of the first pass of rolling; b. rolling the second pass: the flow rate of the cooling water of the roller is 20 percent Qm when the head part of the strip blank is rolled 3 Constant control of/h; during the process of rolling 1/4L2-3/4L2 section of the strip blank, the flow of the cooling water of the roller is 20 percent qm 3 The ratio of/h is increased to 50% Qm in equal proportion 3 /h; the flow rate of the last 1/4L2 section of the rolled strip is 50 percent qm 3 And (3) performing constant control, wherein L2 is the total length in the second pass of rolling; c. rolling for the third time: the flow rate of the cooling water of the roller is 30% qm when rolling the head part of the strip blank 3 Constant control of/h; during the 1/3L3-3/4L3 section of the rolled strip, the flow of the cooling water of the roller is 30 percent qm 3 The ratio of/h is increased to 60% qm 3 /h; the flow is constantly controlled according to 60 percent Q in the later 1/4L3 section of the rolled strip blank, wherein L3 is the total length in the third pass of rolling; d. rolling the fourth pass: the flow rate of the cooling water of the roller is 50 percent qm when the head part of the strip blank is rolled by 8-10m 3 Constant control of/h; the flow rate in the subsequent rolling process is 50% qm 3 The ratio of/h is increased to 60% qm 3 /h, and is constantly controlled to 60% qm 3 Flow rate of/h until the rolling of the pass is completed; e. rolling the fifth pass: the flow rate of the cooling water of the roller is 50 percent qm when the head part of the strip blank is rolled by 5-8m 3 Constant control of/h; the flow rate in the subsequent rolling process is 50% qm 3 The ratio of/h is increased to 60% qm 3 /h, and is constantly controlled to 60% qm 3 And/h flow rate until the rolling of the pass is completed.
The invention can realize a process system through electromechanical integration in the industrial production process, and has strong creativity and practicability. The method can be realized in the following way: in a basic automation level L1 for controlling the cooling water of the rough rolling roller, programming and establishing a titanium and titanium metal roller cooling water process control model, wherein the model comprises the calculation of the length of a strip blank, the control of the flow of cooling water of the roller, the control of time sequence and the like; in the rolling process, the cooling water control L1 level of the rough rolling roller automatically identifies titanium and titanium alloy materials, and after identification, the cooling water control model of the titanium and titanium alloy rolling roller is automatically started; in the production technology of titanium and titanium alloy products, a system automatically identifies materials and recovers the control mode and flow of roller cooling water during rolling of steel products; the whole control and switching are displayed on the operation interface HMI in real time, and the control authority and functions of the control process which are manually prioritized are reserved. The invention relates to a rolling mill working roll cooling process in a titanium and titanium alloy rough rolling process, which is based on production practice inspection through digital simulation research on change rules of heat transfer between a strip and a roller in the titanium and titanium alloy rough rolling process, roller temperature change, thermal convexity and the like. The implementation and application of the cooling process ensure the uniformity of the temperature of the working rolls and the stability of the roll convexity and the roll shape in the whole rolling process, thereby greatly improving the irregular deviation defect of the strip blank in the rolling process, effectively improving the deviation sickle bend defect of the titanium strip blank in the rolling process, and improving the rolling stability and the surface quality of the finish rolling titanium strip, wherein the qualification rate of the central line deviation of the strip blank of +/-30 mm reaches 95.30%. In general, it is preferred in step a that the length of the head portion of the rolled strip is 1/4 of the total length L1. Likewise, in step b, the length of the head portion of the rolled strip is 1/4 of the total length L2, and in step c, the length of the head portion of the rolled strip is 1/4 of the total length L3. In order to ensure the rolling quality, the roughing mill preferably has a rolling speed in the range of 3.5 to 4.5m/s. The cooling water system of the working roller of the roughing mill comprises a flowmeter and a flow regulating valve control device, so that the control and regulation of water quantity are realized.
Claims (6)
1. The rolling mill roller cooling method is characterized in that: rolling by a 5-pass process of a single roughing mill, wherein the cooling water quantity of a working roll of a roughing stand is defined as Qm 3 And/h, defining the initial total length of the strip blank as L, wherein in the 5-pass rolling process of the rolling mill, the flow of the cooling water of the roller of the rolling gap of each pass is 20% qm 3 /h-30％Qm 3 And (3) controlling constant flow rate, wherein the control process of the cooling water of the roughing mill roller is as follows:
a. rolling for the first time: the cooling water of the roller is not started when the head part of the strip blank is rolled; 1/4L1-3 of rolled stripIn the process of the section/4L 1, the flow of the cooling water of the roller is increased to 40% qm from 0 equal proportion 3 /h; in the process of rolling the later 1/4L1 section of the strip blank, the flow rate is 40 percent qm 3 And (3) performing constant control, wherein L1 is the total length of the first pass of rolling;
b. rolling the second pass: the flow rate of the cooling water of the roller is 20 percent qm when the head part of the strip blank is rolled 3 Constant control of/h; during the process of rolling 1/4L2-3/4L2 section of the strip blank, the flow of the cooling water of the roller is 20 percent qm 3 The ratio of/h is increased to 50% qm 3 /h; the flow rate of the last 1/4L2 section of the rolled strip is 50 percent qm 3 And (3) performing constant control, wherein L2 is the total length in the second pass of rolling;
c. rolling for the third time: the flow rate of the cooling water of the roller is 30% qm when rolling the head part of the strip blank 3 Constant control of/h; during the 1/3L3-3/4L3 section of the rolled strip, the flow of the cooling water of the roller is 30 percent qm 3 The ratio of/h is increased to 60% qm 3 /h; the flow is constantly controlled according to 60 percent Q in the later 1/4L3 section of the rolled strip blank, wherein L3 is the total length in the third pass of rolling;
d. rolling the fourth pass: the flow rate of the cooling water of the roller is 50 percent qm when the head part of the strip blank is rolled by 8-10m 3 Constant control of/h; the flow rate in the subsequent rolling process is 50% qm 3 The ratio of/h is increased to 60% qm 3 /h, and is constantly controlled to 60% qm 3 Flow rate of/h until the rolling of the pass is completed;
e. rolling the fifth pass: the flow rate of the cooling water of the roller is 50 percent qm when the head part of the strip blank is rolled by 5-8m 3 Constant control of/h; the flow rate in the subsequent rolling process is 50% qm 3 The ratio of/h is increased to 60% qm 3 /h, and is constantly controlled to 60% qm 3 And/h flow rate until the rolling of the pass is completed.
2. The rolling mill roll cooling method of claim 1, wherein: in step a, the length of the head portion of the rolled strip is 1/4 of the total length L1.
3. The rolling mill roll cooling method of claim 1, wherein: in step b, the length of the head portion of the rolled strip is 1/4 of the total length L2.
4. The rolling mill roll cooling method of claim 1, wherein: in step c, the length of the head portion of the rolled strip is 1/4 of the total length L3.
5. The rolling mill roll cooling method of claim 1, 2, 3 or 4, wherein: the rolling speed of the roughing mill ranges from 3.5 to 4.5m/s.
6. The rolling mill roll cooling method of claim 1, 2, 3 or 4, wherein: the cooling water system of the working roller of the roughing mill comprises a flowmeter and a flow regulating valve control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111001892.3A CN113714299B (en) | 2021-08-30 | 2021-08-30 | Rolling mill roller cooling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111001892.3A CN113714299B (en) | 2021-08-30 | 2021-08-30 | Rolling mill roller cooling method |
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| CN113714299A CN113714299A (en) | 2021-11-30 |
| CN113714299B true CN113714299B (en) | 2023-10-24 |
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| CN115283444B (en) * | 2022-10-09 | 2022-12-20 | 江苏常宝钢管股份有限公司 | Method for cooling roller of continuous rolling mill |
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|---|---|---|---|---|
| AU1800588A (en) * | 1987-05-28 | 1988-12-21 | William John Edwards | Coolant flow control |
| JPH0732006A (en) * | 1993-07-22 | 1995-02-03 | Kawasaki Steel Corp | Cold rolling method of directional silicon steel sheet and roll cooling device of cold rolling mill |
| CN1640575A (en) * | 2004-01-12 | 2005-07-20 | 鞍钢集团新钢铁有限责任公司 | Band-steel laminar-flow cooling device and its cooling control method |
| CN2860648Y (en) * | 2006-01-11 | 2007-01-24 | 昆明钢铁股份有限公司 | Cooling unit for roller of mill |
| CN101306438A (en) * | 2008-06-23 | 2008-11-19 | 秦皇岛首秦金属材料有限公司 | Accelerated stream cooling device cooling technique integration method |
| JP2009226438A (en) * | 2008-03-21 | 2009-10-08 | Hitachi Ltd | Interstand cooling controlling system and method for hot rolling mill |
| JP2009233724A (en) * | 2008-03-28 | 2009-10-15 | Jfe Steel Corp | Cooling control method for hot-rolled metal strip in hot rolling, and manufacturing method for hot-rolled metal strip |
| CN101804422A (en) * | 2010-02-10 | 2010-08-18 | 东北大学 | Ultrafast cooling device for large rolled H-shaped steel |
-
2021
- 2021-08-30 CN CN202111001892.3A patent/CN113714299B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU1800588A (en) * | 1987-05-28 | 1988-12-21 | William John Edwards | Coolant flow control |
| JPH0732006A (en) * | 1993-07-22 | 1995-02-03 | Kawasaki Steel Corp | Cold rolling method of directional silicon steel sheet and roll cooling device of cold rolling mill |
| CN1640575A (en) * | 2004-01-12 | 2005-07-20 | 鞍钢集团新钢铁有限责任公司 | Band-steel laminar-flow cooling device and its cooling control method |
| CN2860648Y (en) * | 2006-01-11 | 2007-01-24 | 昆明钢铁股份有限公司 | Cooling unit for roller of mill |
| JP2009226438A (en) * | 2008-03-21 | 2009-10-08 | Hitachi Ltd | Interstand cooling controlling system and method for hot rolling mill |
| JP2009233724A (en) * | 2008-03-28 | 2009-10-15 | Jfe Steel Corp | Cooling control method for hot-rolled metal strip in hot rolling, and manufacturing method for hot-rolled metal strip |
| CN101306438A (en) * | 2008-06-23 | 2008-11-19 | 秦皇岛首秦金属材料有限公司 | Accelerated stream cooling device cooling technique integration method |
| CN101804422A (en) * | 2010-02-10 | 2010-08-18 | 东北大学 | Ultrafast cooling device for large rolled H-shaped steel |
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Effective date of registration: 20231215 Address after: 617000 Xiangyang Village, East District, Sichuan, Panzhihua Patentee after: PANGANG GROUP PANZHIHUA STEEL & VANADIUM Co.,Ltd. Patentee after: PANGANG GROUP ENGINEERING TECHNOLOGY Co.,Ltd. Address before: 617000 Panzhihua Steel Vanadium Co., Ltd., Panzhihua Steel Group, Xiangyang Yicun, East District, Panzhihua City, Sichuan Province Patentee before: PANGANG GROUP PANZHIHUA STEEL & VANADIUM Co.,Ltd. |
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