TWI763572B - Method and system for rolling a steel slab having a wedge shape - Google Patents
Method and system for rolling a steel slab having a wedge shape Download PDFInfo
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Abstract
Description
本發明是有關於一種楔形鋼胚之軋延方法與軋延系統。 The present invention relates to a rolling method and rolling system for wedge-shaped steel billets.
熱軋係以扁鋼胚為原料,先以高溫加熱軟化,再藉由粗軋機以及精軋機軋延成鋼帶。然後,再經過噴水冷卻後,以盤捲形式產出。然扁鋼胚形貌雖為對稱長方體,但若因為煉鋼連鑄過程中受冷卻或設備影響,而產生形狀變異(楔形),則可能使得後續軋延中心偏移,導致撞擊和/或毀損熱軋設備的風險。 The hot rolling system uses flat steel billets as raw materials, which are first heated and softened at high temperature, and then rolled into steel strips by rough rolling mills and finishing mills. Then, after cooling by spraying water, it is produced in the form of coils. Although the shape of the flat steel billet is a symmetrical cuboid, if the shape variation (wedge) occurs due to cooling or equipment during the steelmaking and continuous casting process, the subsequent rolling center may be offset, resulting in impact and/or damage. Risk of hot rolling equipment.
為了解決上述問題,本發明之實施例提出一種楔形鋼胚之軋延方法與軋延系統,其可減少因軋延中心偏移而導致撞擊和/或毀損熱軋設備的風險。 In order to solve the above problems, embodiments of the present invention provide a rolling method and rolling system for wedge-shaped billets, which can reduce the risk of impacting and/or damaging hot rolling equipment due to the offset of rolling center.
根據本發明之一實施例,上述楔形鋼胚之軋延方法包含:獲得一鋼胚外形資料,其中此鋼胚外形資料包含鋼 胚寬度值;根據鋼胚外形資料來判斷鋼胚是否屬於楔形不良;當鋼胚是屬於楔形不良時,判斷鋼胚之一滾軋後目標寬度值與鋼胚寬度值之差值是否大於大於一裁減量閥值;當鋼胚之滾軋後目標寬度值與鋼胚寬度值之差值未大於裁減量閥值時,修改滾軋後目標寬度值,其中修改後之滾軋後目標寬度值小於鋼胚寬度值,且修改後之滾軋後目標寬度值與鋼胚寬度值之差值大於裁減量閥值;以及根據修改後之滾軋後目標寬度值來對鋼胚進行一裁邊製程,其中此裁邊製程採用槽形裁邊輥。 According to an embodiment of the present invention, the method for rolling a wedge-shaped steel billet includes: obtaining a shape data of a steel billet, wherein the shape data of the steel billet includes steel The width value of the steel billet; according to the shape data of the steel billet, it is judged whether the steel billet belongs to the bad wedge shape; when the billet belongs to the bad wedge shape, it is judged whether the difference between the target width value after rolling and the steel billet width value is greater than one Threshold value of cutting amount; when the difference between the target width value after rolling of the billet and the width value of the billet is not greater than the cutting amount threshold, modify the target width value after rolling, and the target width after rolling after modification is less than The width value of the steel billet, and the difference between the modified target width value after rolling and the steel billet width value is greater than the cutting amount threshold; and according to the modified target width value after rolling, a trimming process is performed on the steel billet, Among them, this trimming process adopts grooved trimming rollers.
在一些實施例中,上述之楔形鋼胚之軋延方法更包含利用一邊導器來對裁邊後之鋼胚進行一側邊矯正製程,其中此側邊矯正製程係對裁邊後之鋼胚施加夾持壓力。 In some embodiments, the above-mentioned rolling method of wedge-shaped steel billet further includes using a side guide to perform a side edge correction process on the edge-cut steel billet, wherein the side edge correction process is on the edge-cut steel billet. Apply clamping pressure.
在一些實施例中,夾持壓力大於4.5噸。 In some embodiments, the clamping pressure is greater than 4.5 tons.
在一些實施例中,上述之楔形鋼胚之軋延方法更包含:對該鋼胚進行一水平軋延製程。 In some embodiments, the rolling method for the wedge-shaped steel billet further comprises: performing a horizontal rolling process on the steel billet.
在一些實施例中,前述之水平軋延製程包含:根據水平軋輥之一軋輥長度以及前述之鋼胚外形資料來計算一軋輥水平傾斜量;以及根據該軋輥水平傾斜量來調整一水平軋輥之傾斜量,以利用該水平軋輥來對該鋼胚進行軋延。 In some embodiments, the aforementioned horizontal rolling process includes: calculating a horizontal inclination amount of a roll according to a roll length of a horizontal roll and the aforementioned steel billet profile data; and adjusting the inclination of a horizontal roll according to the horizontal inclination amount of the roll amount to roll the billet with the horizontal rolls.
根據本發明之一實施例,上述楔形鋼胚之軋延系統包含:垂直軋機、鋼胚寬度量測裝置以及軋延控制系統。垂直軋機包含槽形裁邊輥。軋延控制系統用以:鋼胚外形資料,其中此鋼胚外形資料包含鋼胚寬度值;根據鋼胚外 形資料來判斷鋼胚是否屬於楔形不良;當鋼胚是屬於楔形不良時,判斷鋼胚之一滾軋後目標寬度值與鋼胚寬度值之差值是否一裁減量閥值;當鋼胚之滾軋後目標寬度值與鋼胚寬度值之差值未大於裁減量閥值時,修改滾軋後目標寬度值,其中修改後之滾軋後目標寬度值小於鋼胚寬度值,且修改後之滾軋後目標寬度值與鋼胚寬度值之差值大於裁減量閥值;以及根據修改後之滾軋後目標寬度值來對鋼胚進行一裁邊製程,並利用鋼胚寬度量測裝置來量測鋼胚之寬度,其中此裁邊製程採用槽形裁邊輥。 According to an embodiment of the present invention, the rolling system for the wedge-shaped billet includes: a vertical rolling mill, a billet width measuring device, and a rolling control system. Vertical mills contain grooved trimming rolls. The rolling control system is used for: the shape data of the steel billet, wherein the shape data of the steel billet includes the width value of the steel billet; The shape data is used to judge whether the steel billet is wedge-shaped bad; when the steel billet is wedge-shaped bad, it is judged whether the difference between the target width value after rolling and the steel billet width value is a reduction threshold; When the difference between the target width value after rolling and the width value of the billet is not greater than the cutting amount threshold, modify the target width value after rolling, wherein the target width value after rolling is less than the billet width value, and the modified The difference between the target width value after rolling and the width value of the steel billet is greater than the cutting amount threshold; and according to the modified target width value after rolling rolling, a trimming process is performed on the billet, and a billet width measuring device is used to measure the width of the billet. Measure the width of the steel billet, in which this trimming process uses a grooved trimming roller.
在一些實施例中,前述之楔形鋼胚之軋延系統更包含一邊導器,用以對裁邊後之該鋼胚進行一側邊矯正製程,其中該側邊矯正製程係對裁邊後之該鋼胚施加一夾持壓力。 In some embodiments, the aforementioned wedge-shaped steel billet rolling system further includes a side guide for performing a side edge correction process on the steel billet after edge trimming, wherein the side edge correction process is a side edge correction process for the edge trimming process. The billet applies a clamping pressure.
在一些實施例中,夾持壓力大於4.5噸。 In some embodiments, the clamping pressure is greater than 4.5 tons.
在一些實施例中,前述之楔形鋼胚之軋延系統更包含一水平軋機,其中前述之軋延控制系統更用以:控制水平軋機來對鋼胚進行一水平軋延製程。 In some embodiments, the aforementioned wedge-shaped steel billet rolling system further includes a horizontal rolling mill, wherein the aforementioned rolling control system is further configured to: control the horizontal rolling mill to perform a horizontal rolling process on the steel billet.
在一些實施例中,水平軋延製程包含:根據水平軋輥之一軋輥長度以及鋼胚外形資料來計算一軋輥水平傾斜量;以及根據軋輥水平傾斜量來調整水平軋機之一水平軋輥之傾斜量,以利用水平軋輥來對鋼胚進行軋延。 In some embodiments, the horizontal rolling process includes: calculating a horizontal inclination amount of a roll according to the roll length of one of the horizontal rolls and the profile data of the steel billet; and adjusting the inclination amount of a horizontal roll of the horizontal rolling mill according to the horizontal inclination amount of the roll, The steel billet is rolled with horizontal rolls.
為讓本發明的上述特徵和優點能更明顯易懂,下文特舉實施例,並配合所附圖式作詳細說明如下。 In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.
100:楔形鋼胚之軋延系統 100: Rolling system for wedge-shaped billets
110:軋延產線 110: Rolling line
112:第一軋機站 112: The first rolling mill station
112a:垂直軋機 112a: Vertical Mill
112b:水平軋機 112b: Horizontal Mill
112c:鋼胚寬度量測裝置 112c: Steel billet width measuring device
114:第二軋機站 114: Second Mill Station
114a:垂直軋機 114a: Vertical Mill
114b:水平軋機 114b: Horizontal Mill
114c:鋼胚寬度量測裝置 114c: Steel billet width measuring device
116:輸送裝置 116: Conveyor
118:鋼胚寬度量測裝置 118: Steel billet width measuring device
120:軋延控制系統 120: Rolling control system
210:槽形裁邊輥 210: Grooved edge trimming roller
212:溝槽部 212: groove part
220:鋼胚 220: Steel Billet
222:側彎鋼胚部分 222: Side bending billet part
300:楔形鋼胚之軋延方法 300: Rolling method of wedge-shaped billets
310~350:步驟 310~350: Steps
410:水平軋輥 410: Horizontal roll
510:邊導器 510: Edge guide
dS1:傾斜量 dS1: Slope amount
H1、H2:高度 H1, H2: height
W:鋼胚寬度 W: steel billet width
△t:高度差 △t: height difference
圖1係繪示根據本發明實施例之楔形鋼胚之軋延系統。 FIG. 1 illustrates a rolling system for a wedge-shaped billet according to an embodiment of the present invention.
圖2係繪示根據本發明實施例之槽形裁邊輥對鋼胚滾軋的示意圖。 FIG. 2 is a schematic diagram illustrating the rolling of a billet by a groove-shaped trimming roller according to an embodiment of the present invention.
圖3係繪示根據本發明實施例之楔形鋼胚之軋延方法的流程示意圖。 FIG. 3 is a schematic flowchart illustrating a rolling method of a wedge-shaped steel billet according to an embodiment of the present invention.
圖4係繪示根據本發明實施例之水平軋輥與鋼胚示意圖。 4 is a schematic diagram illustrating a horizontal roll and a steel billet according to an embodiment of the present invention.
圖5係繪示根據本發明實施例之邊導器的示意圖。 5 is a schematic diagram illustrating an edge guide according to an embodiment of the present invention.
下文是以實施方式配合附圖作詳細說明,但所提供的實施方式並非用以限制本發明所涵蓋的範圍,而結構運作的描述非用以限制其執行的順序,任何由元件重新組合的結構,所產生具有均等功效的裝置,皆為本發明所涵蓋的範圍。此外,圖式僅以說明為目的,並未依照原尺寸作圖。 The following is a detailed description of the embodiments in conjunction with the accompanying drawings, but the provided embodiments are not intended to limit the scope of the present invention, and the description of the structure operation is not intended to limit the order of its execution. Any structure that is recombined by elements , the resulting devices with equal efficacy are all within the scope of the present invention. In addition, the drawings are for illustrative purposes only and are not drawn in full scale.
關於本文中所使用之『第一』、『第二』、...等,並非特別指次序或順位的意思,其僅為了區別以相同技術用語描述的元件或操作。 The terms "first", "second", .
請參照圖1,其係繪示根據本發明實施例之楔形鋼胚之軋延系統100,其包含軋延產線110以及軋延控制系統120。軋延產線110係用以接收鋼胚,並將其軋延成鋼帶。軋延控制系統120係電性連接至軋延產線110,以控
制軋延產線110的生產過程。例如,在本實施例中,軋延產線110包含第一軋機站112、第二軋機站114、輸送裝置116以及鋼胚寬度量測裝置118,而軋延控制系統120係用以控制第一軋機站112、第二軋機站114、輸送裝置116的操作來對輸送裝置116上的鋼胚(未繪示)進行軋延。在一實施例中,楔形鋼胚之軋延系統100可接收煉鋼廠所提供的鋼胚外形資料。煉鋼廠可使用,例如中華民國專利號第1251661號之技術來獲得鋼胚的外形資料。
Please refer to FIG. 1 , which illustrates a
第一軋機站112包含垂直軋機112a、水平軋機112b以及鋼胚寬度量測裝置112c。垂直軋機112a包含直立式的槽形裁邊輥,用以對鋼胚進行裁邊製程。裁邊製程係透過直立式的槽形裁邊輥來對鋼胚的側邊進行滾軋,以調整鋼胚的寬度,如圖2所示。在圖2中,槽形裁邊輥210的溝槽部212係對準鋼胚220的側邊,並對鋼胚的側邊進行滾軋,以達到鋼胚寬度裁減的目的。水平軋機112b係用以對鋼胚進行水平軋延製程,以將鋼胚軋延成帶狀,並控制鋼胚的厚度。鋼胚寬度量測裝置112c係用以量測經過垂直軋機112a與水平軋機112b滾軋後的鋼胚寬度/偏移值,並將其傳送至軋延控制系統120。其中,鋼胚偏移值代表鋼胚在軋延後鋼胚中心偏移的程度。
The first
在進行滾軋時,第一軋機站112可對鋼胚進行多次滾軋,而鋼胚寬度量測裝置112c可相應地量測滾軋後鋼胚的寬度/偏移值。例如,鋼胚可往復多次通過第一軋機站112來進行多次滾軋。在本實施例中,鋼胚會往復通過
第一軋機站112五次,但本發明之實施例並不受限於此。
During rolling, the first
第二軋機站114包含垂直軋機114a、水平軋機114b以及鋼胚寬度量測裝置114c。垂直軋機114a包含直立式的槽形裁邊輥,用以對鋼胚進行裁邊製程。裁邊製程係透過直立式的槽形裁邊輥來對鋼胚的側邊進行滾軋,以調整鋼胚的寬度。水平軋機114b係用以對鋼胚進行水平軋延製程,以控制鋼胚的厚度。鋼胚寬度量測裝置114c係類似於鋼胚寬度量測裝置112c,用以量測經過垂直軋機114a與水平軋機114b滾軋後的鋼胚寬度/偏移值,以得到對應的鋼胚外形資料,並將其傳送至軋延控制系統120。
The second
在進行滾軋時,第二軋機站114可對鋼胚進行多次滾軋,而鋼胚寬度量測裝置114c可相應地量測滾軋後鋼胚的寬度/偏移值。例如,鋼胚可往復多次通過第二軋機站112來進行多次滾軋。在本實施例中,鋼胚會往復通過第二軋機站114三次,但本發明之實施例並不受限於此。
During rolling, the second
在一些實施例中,第一軋機站112可適用於粗軋製程,第二軋機站114也適用於粗軋製程,但本發明之實施例並不受限於此。
In some embodiments, the first
另外,在第一軋機站112之前,可再設置鋼胚寬度量測裝置118,以於鋼胚進入第一軋機站112之前先量測鋼胚之鋼胚寬度/偏移值。鋼胚寬度量測裝置118之功能係類似於鋼胚寬度量測裝置112c,故不在此贅述。
In addition, before the first
請參照圖3,其係繪示根據本發明實施例之楔形鋼
胚之軋延方法300的流程示意圖,其中軋延方法300係適用於上述軋延系統100之軋延控制系統120。在軋延方法300中,首先進行步驟310,以獲得煉鋼廠所提供之一鋼胚外形資料。如之前所述,煉鋼廠可使用例如中華民國專利號第I251661號之技術來獲得鋼胚的外形資料。
Please refer to FIG. 3 , which illustrates a wedge-shaped steel according to an embodiment of the present invention
A schematic flowchart of the rolling
然後,進行步驟320,以根據鋼胚外形資料來判斷鋼胚是否屬於楔形不良。在本實施例中,當鋼胚寬度方向兩側厚度不等高時,便會判斷鋼胚屬於楔形不良的狀況。當判斷出鋼胚屬於楔形不良時,進行步驟330,以判斷預設之滾軋後目標寬度值與前述之鋼胚寬度值之差值是否大於一裁減量閥值,例如30公厘(mm)。當預設之滾軋後目標寬度值與前述之鋼胚寬度值之差值未大於30公厘時,進行步驟340,以修改滾軋後目標寬度值。此修改後之滾軋後目標寬度值小於前述之鋼胚寬度值,且差值大於30公厘。接著,進行步驟350,以根據修改後之滾軋後目標寬度值來對鋼胚進行裁邊製程。在本發明之實施例中,可透過有限元素模型分析來對鋼胚進行分析,以根據實際需求來獲得合適的裁減量閥值。
Then, go to step 320 to determine whether the steel blank is wedge-shaped defect according to the shape data of the steel blank. In this embodiment, when the thicknesses of the two sides in the width direction of the steel blank are unequal, it is determined that the steel blank is in a bad wedge shape. When it is determined that the billet is wedge-shaped,
具體而言,若第一軋機站112原本的滾軋後目標寬度值為1280公厘,目前的鋼胚寬度值為1300公厘,則步驟340會去修改滾軋後目標寬度值為,例如1250公厘,使得修改後的滾軋後目標寬度值與目前的鋼胚寬度值之差值(即50公厘)大於30公厘。接著,步驟350會控制第一軋機站112之垂直軋機112a來以1250公厘為滾軋
後目標寬度值進行裁邊製程。具體而言,本實施例將原本對應至訂單需求為1280公厘的產品轉換成對應至訂單需求為1250公厘的產品,以符合產品的尺寸需求。
Specifically, if the original target width after rolling of the
由上述說明可知,在本發明之實施例中,當檢測到鋼胚具有楔形不良的狀況時,改變滾軋後目標寬度值,加大預設的裁減量,使裁減量大於裁減量閥值(例如30公厘),如此即可利用垂直軋機之槽形裁邊輥來消除楔形鋼胚的厚度差異。 It can be seen from the above description that in the embodiment of the present invention, when it is detected that the steel billet has a bad wedge shape, the target width value after rolling is changed, and the preset cutting amount is increased, so that the cutting amount is greater than the cutting amount threshold ( For example, 30 mm), so that the thickness difference of the wedge-shaped billet can be eliminated by using the groove-shaped trimming roll of the vertical rolling mill.
在本發明之一些實施例中,上述之楔形鋼胚之軋延方法300可再調整水平軋機112b之水平軋輥的角度,使其具有一傾斜量(傾斜趨勢與鋼胚相同),再利用水平軋機112b之水平軋輥來對鋼胚進行滾軋,以減少鋼胚側彎,避免鋼胚無法進入下一個製程。
In some embodiments of the present invention, the above-mentioned wedge-shaped
請參照圖4,其係繪示根據本發明實施例之水平軋輥410與鋼胚220示意圖。如圖4所示,水平軋機112b之水平軋輥410具有傾斜量dS1,鋼胚220的兩側高度分別為H1和H2,高度差為△t。傾斜量ds1則可根據下式(1)計算而得:
其中b=0.3;a=0.6;Lc為水平軋輥之長度;W為鋼胚寬度;EqWedge為等效楔形量,其可根據下式(2)計算而得:EqWedge=(dH*dW)/W (2) where b=0.3; a=0.6; Lc is the length of the horizontal roll; W is the width of the steel billet; EqWedge is the equivalent wedge, which can be calculated according to the following formula (2): EqWedge=(dH*dW)/W (2)
其中dH為一顯著下斜區段之厚度減少量;dW為
顯著下斜區段之寬度。值得說明的是,雖然本案圖4所繪示之鋼胚220的上表面具有固定之斜率,但本案圖4僅用以方便說明。實際上鋼胚220之上表面會具有斜率不同的區段,而其中斜率較大的區段為顯著下斜區段。
where dH is the thickness reduction of a significant downslope section; dW is
The width of the significant downslope segment. It should be noted that although the upper surface of the
在本發明之一些實施例中,軋延產線110可更包含邊導器510,如圖5所示。邊導器510係設置於第一軋機站112與第二軋機站114之間,以對經過第一軋機站112滾軋後的鋼胚220進行側邊矯正製程,其係藉由施以側向作用力,使側彎鋼胚部分222的截面產生扭矩,造成截面應力分布差異,使水平軋延後之側彎程度改善。在本實施例中,邊導器之夾持壓力係大於4.5噸,但本發明之實施例並不受限於此。
In some embodiments of the present invention, the rolling
雖然本發明已以實施例揭露如上,然其並非用以限定本發明,任何所屬技術領域中具有通常知識者,在不脫離本發明的精神和範圍內,當可作些許的更動與潤飾,故本發明的保護範圍當視後附的申請專利範圍所界定者為準。 Although the present invention has been disclosed above by the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the scope of the appended patent application.
300:楔形鋼胚之軋延方法 300: Rolling method of wedge-shaped billets
310~350:步驟 310~350: Steps
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TW266168B (en) * | 1994-03-11 | 1995-12-21 | Kawasaki Seitestu Kk | |
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JP2008238249A (en) * | 2007-03-28 | 2008-10-09 | Hitachi Ltd | Method and system for controlling rolled shape |
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