CN115544423A - Method for calculating width of rolled piece in angle rolling process of wide and thick plate rolling mill - Google Patents
Method for calculating width of rolled piece in angle rolling process of wide and thick plate rolling mill Download PDFInfo
- Publication number
- CN115544423A CN115544423A CN202210838247.5A CN202210838247A CN115544423A CN 115544423 A CN115544423 A CN 115544423A CN 202210838247 A CN202210838247 A CN 202210838247A CN 115544423 A CN115544423 A CN 115544423A
- Authority
- CN
- China
- Prior art keywords
- rolling
- width
- rolled piece
- calculated
- region
- 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.)
- Pending
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000009749 continuous casting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 238000003079 width control Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/04—Manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Business, Economics & Management (AREA)
- Data Mining & Analysis (AREA)
- Mechanical Engineering (AREA)
- Human Resources & Organizations (AREA)
- Computational Mathematics (AREA)
- Tourism & Hospitality (AREA)
- Primary Health Care (AREA)
- General Business, Economics & Management (AREA)
- Marketing (AREA)
- General Health & Medical Sciences (AREA)
- Economics (AREA)
- Algebra (AREA)
- Strategic Management (AREA)
- Health & Medical Sciences (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Manufacturing & Machinery (AREA)
- Pure & Applied Mathematics (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a method for calculating the width of a rolled piece in the angle rolling process of a wide and thick plate rolling mill, relates to the technical field of steel production, and aims at the calculation requirement of the width of the rolled piece in the angle rolling process of the wide and thick plate rolling mill.
Description
Technical Field
The invention relates to the technical field of steel production, in particular to a method for calculating the width of a rolled piece in the angle rolling process of a wide and thick plate rolling mill.
Background
The blank adopted by the wide and thick plate rolling mill is generally a continuous casting blank, the width and the thickness of the blank are relatively fixed under the condition of continuous casting machine equipment, the length of the blank can be determined according to the unit weight of a finished product, but the unit weight exceeding a certain limit can cause the length of the blank to exceed the condition limit of rolling mill equipment, steel cannot be rotated, and widening and rolling cannot be carried out. If the target width of the finished product exceeds the width of the blank, production cannot be performed.
For the condition, angular rolling can be adopted for production, as shown in fig. 1, the 1 st-pass rolled piece rotates by a certain angle, and the rolled piece is bitten by an oblique angle. And after the 1 st pass rolling is finished, the shape of the rolled piece is changed into a parallelogram. In the subsequent 2 nd pass, the rolled piece rotates in the opposite direction, and is obliquely engaged again, and the rolled piece becomes rectangular again after the rolling is finished. And the width of the rolled piece reaches the target width through two times of angle rolling.
In the angle rolling process, due to the existence of a corner, the rolling width of a rolled piece is gradually changed in the rolling process, the rolled piece starts to bite into a point, the part in contact with the roller is gradually changed into a surface and is continuously changed in a certain range, and the contact with the roller gradually changes from the surface to the point when the tail part is polished. Width control is the most important process objective in the angular rolling process, and therefore, it is very important to accurately calculate the width of a rolled piece in the angular rolling process.
Disclosure of Invention
The invention aims at the technical problems, overcomes the defects of the prior art, and provides a method for calculating the width of a rolled piece in the angle rolling process of a wide and thick plate rolling mill, which comprises the following steps:
(1) Rolled piece zone division during angle rolling
Setting the initial plane shape of the rolled piece to be A 0 B 0 C 0 D 0 Width of b 0 Length of l 0 The angle rolling rotation angle is alpha, and rolled pieces in the angle rolling process are divided into triangular areas at the head end and the tail end and a parallelogram area in the middle;
(2) Roll linear velocity calculation in angular rolling process
The roll line speed was calculated as follows:
in the formula: v is the roller linear velocity, m/s; r is the radius of the working roll, mm; n is the roller rotating speed r/min;
(3) Head triangle region width calculation
When the triangular area at the head part is rolled, the steel biting starts to be a point, the width also starts to gradually increase along with the increase of the part of the rolled piece entering the rolling mill until the position of the maximum width,
let the rolling time width of the region be b 11 The rolling length of the triangular region at the head is l 11 The rolling time of the triangular region at the head is t 11 According to the trigonometric function, the following formula is calculated:
l 11 ＝b 0 sinα ②
when t is less than or equal to t 11 The rolled piece width is calculated as follows:
(4) Middle parallelogram region
The width of the roller is constant when the roller is contacted with the rolled piece in the area during rolling, the position projected on the roller is changed, and the width of the roller during rolling in the area at a certain time is set as b 12 The rolling length of the middle parallelogram is l 12 The rolling time of the middle parallelogram is t 12 According to the trigonometric function, the following formula is calculated:
l 12 ＝l 0 cosα-b 0 sinα ⑤
when t is 11 ＜t＜t 11+ t 12 In time, the rolled piece width is calculated as follows:
(5) Tail triangular area
Similar to the triangular area at the head, the difference is that the width of the area is gradually reduced from the maximum width value to 0 when the steel is cast, the rolling process of the pass is finished,
let the rolling width at a certain time in the region be b 13 The rolling length of the tail triangular region is l 13 Rolling time of the tail triangular region is t 13 According to the trigonometric function, the following formula is calculated:
l 13 ＝l 11 ＝b 0 sinα ⑧
total rolling time of all three zones is t 1 Is calculated as follows:
t 1 ＝t 11 +t 12 +t 13 ⑩
when t is 11 +t 12 ≤t≤t 1 The rolled piece width is calculated as follows:
the invention has the beneficial effects that: aiming at the calculation requirement of the width of the rolled piece in the angle rolling process of the wide and thick plate rolling mill, the width calculation in the angle rolling process is realized by carrying out region division on the rolled piece and carrying out partition calculation. The angle rolling production mode can be adopted to widen the rolling, the annual production is increased by 3.6 ten thousand tons, and the annual benefit is 1512 ten thousand yuan.
Drawings
FIG. 1 is a schematic view of a wide and thick plate rolling mill angle rolling process;
FIG. 2 is a schematic diagram of rolled piece zone division during angular rolling;
FIG. 3 is a schematic view of a triangular area at the head of the angle rolling process;
FIG. 4 is a schematic view of the middle parallelogram region of the corner rolling process;
FIG. 5 is a schematic diagram of the triangular area at the end of the corner rolling process.
FIG. 6 is a graph showing the width change of a corner rolling process.
Detailed Description
The method for calculating the width of the rolled piece in the angle rolling process of the wide and thick plate rolling mill provided by the embodiment comprises the following steps:
(1) Rolled piece area division in a corner rolling process
Width b of rolled material 0 2770mm, length l 0 The rolling angle is 5000mm, and the angle rolling rotation angle is 30 degrees. The rolled piece in the angle rolling process is divided into a triangular area at the head end and a triangular area at the tail end and a parallelogram area in the middle.
(2) Roll linear velocity calculation in angular rolling process
The radius R =580mm of the working roll of the rolling mill, the rotating speed n =30R/min of the rolling roll, and the linear speed of the rolling roll is calculated according to the formula (1):
(3) Head triangle region width calculation
Calculating the rolling length of the triangular region of the head according to the formula (2):
l 11 ＝b 0 sinα＝2770×sin30°＝1385mm；
according to the formula (3), the rolling time of the head triangular region is calculated:
when t is less than or equal to 0.7605s, calculating the width of the rolled piece according to the formula (4) and calculating as follows:
when t =0.7605s, it is calculated.
(4) Middle parallelogram region
Calculating the middle parallelogram rolling length according to formula (5):
l 12 ＝l 0 cosα-b 0 sinα＝5000×cos30°-2770×sin30°＝2945mm；
calculating the middle parallelogram rolling time according to the formula (6):
when t is more than 0.7605s and less than 2.3775s, calculating the width of the rolled piece according to the formula (7):
(5) Tail triangular area
Calculating the rolling length of the tail triangular region according to the formula (8):
l 13 ＝l 11 ＝b 0 sinα＝1385mm；
calculating the rolling time of the tail triangular region according to the formula (9):
the total rolling time for all three zones is calculated according to equation (10):
t 1 ＝t 11 +t 12 +t 13 ＝0.7605+1.617+0.7605＝3.138s；
when t is more than or equal to 2.3775s and less than or equal to 3.138s, calculating the width of the rolled piece according to a formula (11):
when t =2.3775, b 13 ＝3198.6mm；
When t =3.137, b 13 ＝0mm。
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the present invention.
Claims (1)
1. A method for calculating the width of a rolled piece in the angle rolling process of a wide and thick plate rolling mill is characterized by comprising the following steps: the method comprises the following steps:
(1) Rolled piece zone division during angle rolling
Setting the initial plane shape of the rolled piece to be A 0 B 0 C 0 D 0 Width of b 0 Length of l 0 The angle rolling rotation angle is alpha, and rolled pieces in the angle rolling process are divided into triangular areas at the head end and the tail end and a parallelogram area in the middle;
(2) Roll linear velocity calculation in angular rolling process
The roll line speed was calculated as follows:
in the formula: v is the roller linear velocity, m/s; r is the radius of the working roll, mm; n is the roller rotating speed r/min;
(3) Head triangle region width calculation
When the head triangular area is rolled, the steel biting begins to be a point, the width begins to gradually increase along with the increase of the part of a rolled piece entering a rolling mill until the position of the maximum width,
let the rolling time width of the region be b 11 The rolling length of the triangular region at the head is l 11 The rolling time of the triangular region at the head is t 11 According to the trigonometric function, the following formula is calculated:
l 11 ＝b 0 sinα ②
when t is less than or equal to t 11 The rolled piece width is calculated as follows:
(4) Middle parallelogram area
The width of the roll is constant when the roll is in contact with the rolling stock in this region during rolling, the position of the projection on the roll varies,
let the rolling width at a certain time in the region be b 12 The rolling length of the middle parallelogram is l 12 The rolling time of the middle parallelogram is t 12 According to the trigonometric function, the following formula is calculated:
l 12 ＝l 0 cosα-b 0 sinα ⑤
when t is 11 ＜t＜t 11+ t 12 The rolled piece width is calculated as follows:
(5) Tail triangular area
Similar to the triangular area at the head, the difference is that the width of the area is gradually reduced from the maximum width value to 0 when the steel is cast, the rolling process of the pass is finished,
let the rolling time width of the region be b 13 The rolling length of the tail triangular region is l 13 Rolling time of the tail triangular region is t 13 According to the trigonometric function, the following formula is calculated:
l 13 ＝l 11 ＝b 0 sinα ⑧
total rolling time of all three zones is t 1 Is calculated asThe following:
t 1 ＝t 11 +t 12 +t 13 ⑩
when t is 11 +t 12 ≤t≤t 1 The rolled piece width is calculated as follows:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210838247.5A CN115544423A (en) | 2022-07-14 | 2022-07-14 | Method for calculating width of rolled piece in angle rolling process of wide and thick plate rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210838247.5A CN115544423A (en) | 2022-07-14 | 2022-07-14 | Method for calculating width of rolled piece in angle rolling process of wide and thick plate rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115544423A true CN115544423A (en) | 2022-12-30 |
Family
ID=84723261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210838247.5A Pending CN115544423A (en) | 2022-07-14 | 2022-07-14 | Method for calculating width of rolled piece in angle rolling process of wide and thick plate rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115544423A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116651933A (en) * | 2023-08-02 | 2023-08-29 | 东北大学 | Corner rolling method and device for plate and storage medium |
-
2022
- 2022-07-14 CN CN202210838247.5A patent/CN115544423A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116651933A (en) * | 2023-08-02 | 2023-08-29 | 东北大学 | Corner rolling method and device for plate and storage medium |
| CN116651933B (en) * | 2023-08-02 | 2023-09-29 | 东北大学 | Corner rolling method and device for plate and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115544423A (en) | Method for calculating width of rolled piece in angle rolling process of wide and thick plate rolling mill | |
| CN111889512B (en) | Method for producing thin steel plate by single-stand rolling mill | |
| CN112958633A (en) | Incoming material camber-based fine rolling strip steel head pre-swing leveling control method | |
| EP2692453B1 (en) | Method for manufacturing roll for reducing, and roll for reducing | |
| JPH0455761B2 (en) | ||
| JP4930384B2 (en) | H-section steel rolling method and rolling apparatus | |
| JP2009195925A (en) | Hot rolling method, hot-rolled metal band and electric resistance welded tube | |
| CN115283438A (en) | Method for controlling rolled piece corner in wide and thick plate rolling mill angle rolling process | |
| CN113953478B (en) | Method for improving edge profile of thin strip steel | |
| JPS61165209A (en) | Edging mill of sheet stock | |
| JP3521122B2 (en) | Method of manufacturing H-section steel | |
| JPS6076203A (en) | Edger rolling method of sheet material | |
| JP3848462B2 (en) | Rolling method for H-section steel | |
| JP2695029B2 (en) | Shaped steel edger rolling machine | |
| JP3570336B2 (en) | How to change the crossing angle between runs | |
| JP3391280B2 (en) | How to prevent bending in tube rolling | |
| JPH01321007A (en) | Rolling method including edge drop control means for sheet stock | |
| SU586955A1 (en) | Ball-making method | |
| JPS5926367B2 (en) | Plate camber control method | |
| SU1026852A1 (en) | Metal rolling method | |
| JPS59163005A (en) | Rolling mill | |
| JPH1157801A (en) | Method and mill for roughly rolling of gauge h steel | |
| JPH05123703A (en) | Method for rolling h-shape steel with asymmetric upper and lower parts | |
| RU2371266C1 (en) | Method for preparation of working rollers in pinch-pass mill | |
| RU2360760C1 (en) | Manufacturing method of envelopes by means of rotary extrusion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |