Hot-rolled strip steel main rolling mill equipment production line
By optimizing the unit structure of the hot-rolled strip main rolling mill, the billet is passed through multiple rolling mills and roller tables in sequence, which simplifies the structure, reduces energy consumption, and improves production efficiency. This solves the problems of low production efficiency and high energy consumption caused by the complexity of the existing equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGZHONG TECH (JIANGSU) CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-17
AI Technical Summary
In the existing hot-rolled strip main rolling mill equipment, the unit structure is complex and redundant, resulting in low production efficiency and increased energy consumption.
By optimizing the unit structure, the billet to be processed is sequentially conveyed and rolled through the input roller table of the rolling mill, two roughing vertical rolling mills, several roughing horizontal rolling mills, transition roller table, finishing vertical rolling mill and several finishing horizontal rolling mills, forming a series of combined structures of rolling mills and roller tables, so as to achieve orderly rolling of the billet.
The simplified unit structure reduced production energy consumption, improved production efficiency, and ensured the accuracy and quality of finished product dimensions.
Smart Images
Figure CN224128216U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rolling mill equipment technology, and in particular to a production line for a hot-rolled strip main rolling mill. Background Technology
[0002] Hot-rolled strip steel production lines have also progressed rapidly with my country's economic development in recent years. With the continuous improvement of people's consumption levels and the booming development of industries such as civil construction and automobiles, new demands have been placed on the output and precision of hot-rolled strip steel. Enterprises are actively seeking product transformation and equipment upgrades in response to market demands.
[0003] Currently, the complex and redundant structure of existing hot-rolled strip main rolling mills leads to reduced production efficiency and increased energy consumption. No effective solution has yet been proposed to address these issues. Utility Model Content
[0004] Purpose of the utility model: To provide a hot-rolled strip main rolling mill production line to at least solve one of the problems existing in the prior art.
[0005] Technical solution: A production line for a hot-rolled strip main rolling mill, comprising:
[0006] Rolling mill input roller table;
[0007] Two roughing vertical roll mills are sequentially arranged at the output end of the mill input roller table along the feed direction;
[0008] Several roughing flat roll mills are sequentially arranged at the output end of the roughing vertical roll mill along the feed direction;
[0009] A transition roller table is located at the output end of the roughing flat roll mill along the feed direction;
[0010] A finishing vertical rolling mill is located at the output end of the transition roller table along the feed direction; and
[0011] Several finishing flat roll mills are sequentially arranged at the output end of the finishing vertical roll mill along the feed direction;
[0012] The billet to be processed is sequentially conveyed and rolled through the mill input roller table, two roughing vertical roll mills, several roughing horizontal roll mills, the transition roller table, the finishing vertical roll mill, and several finishing horizontal roll mills to obtain the required finished product size.
[0013] Preferably, the mill input roller table includes: a first support arranged horizontally, and a plurality of first conveying rollers are respectively arranged on the top of the support.
[0014] Preferably, the two roughing vertical roll mills are used to roll the billet to be processed in sequence to control the width of the billet;
[0015] One of the roughing vertical roll mills is located between the mill input roller table and the roughing horizontal roll mill, while the other roughing vertical roll mill is located between the roughing horizontal roll mill.
[0016] Preferably, the number of roughing flat roll mills is four, with two roughing flat roll mills arranged sequentially between the roughing vertical roll mills, and the other two roughing flat roll mills arranged sequentially at the output end of the roughing vertical roll mill on the side away from the mill input roller table.
[0017] Preferably, the four roughing flat roll mills sequentially roll the billet to control the billet thickness and roll the billet into the required intermediate billet size.
[0018] Preferably, the transition roller table includes: a horizontally arranged second support, the top of which is provided with a plurality of second conveying rollers for conveying the billet rolled by the roughing flat roll mill to the finishing vertical roll mill.
[0019] Preferably, the finishing vertical roll mill rolls the intermediate billet to control the width dimension of the intermediate billet.
[0020] Preferably, the number of the aforementioned finishing flat roll mills is nine.
[0021] Preferably, the nine precision rolling mills sequentially roll the intermediate billet to control the thickness of the intermediate billet and roll it into the required finished product size.
[0022] Preferably, the bottom of the two roughing vertical roll mills, the several roughing horizontal roll mills, the several finishing vertical roll mills, and the several finishing horizontal roll mills are respectively provided with height adjustment mechanisms.
[0023] To achieve the above objectives, according to another aspect of this application, a speed reducer is also provided.
[0024] The speed reducer according to this application includes the hot-rolled strip main rolling mill equipment production line as described above.
[0025] Beneficial Effects: In this embodiment, an optimized unit structure is adopted. By sequentially conveying and rolling the billets to be processed through the mill input roller table, two roughing vertical roll mills, several roughing horizontal roll mills, the transition roller table, the finishing vertical roll mill, and several finishing horizontal roll mills, the desired finished product size is obtained. This achieves the purpose of orderly rolling the billets to be processed, thereby simplifying the unit structure and reducing production energy consumption. Furthermore, it solves the technical problem that the existing hot-rolled strip main rolling mill equipment has a complex and redundant unit structure, which leads to reduced production efficiency and increased production energy consumption. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the production line structure of the hot-rolled strip steel main rolling mill equipment of this utility model.
[0027] The attached figures are labeled as follows:
[0028] 10. Mill input roller table; 101. First support; 102. First conveyor roller;
[0029] 20. Roughing vertical roll mill;
[0030] 30. Roughing and flat rolling mill;
[0031] 40. Transition roller conveyor; 401. Second support; 402. Second conveyor roller;
[0032] 50. Finishing vertical roll mill; 60. Finishing horizontal roll mill. Detailed Implementation
[0033] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.
[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0035] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.
[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0037] like Figure 1 As shown, this application relates to a hot-rolled strip main rolling mill production line. The hot-rolled strip main rolling mill production line includes: a mill input roller table 10; the mill input roller table 10 serves as the starting point of the rolling line and is responsible for smoothly and uniformly feeding the billet into the roughing area.
[0038] Preferably, a limit sensor is provided on the mill input roller table 10; this can achieve a good limit sensing effect.
[0039] Two roughing vertical rolling mills 20 are sequentially arranged at the output end of the mill input roller table 10 along the feed direction; by setting them after the mill input roller table 10, they are used to initially adjust the width of the billet.
[0040] The two roughing vertical rolling mills 20 have the following functions: the first roughing vertical rolling mill 20 performs initial width compression (side compression) on the billet, eliminates iron oxide scale, and controls the width of the slab.
[0041] The second roughing mill vertical roll mill has a 20mm fine-tuned width to provide a uniform width reference for subsequent flat roll rolling. Of course, the actual usage function can be adjusted as needed.
[0042] It is important to know that vertical rolls roll laterally, primarily controlling width rather than thickness; this can remove edge defects in the billet and increase rolling stability.
[0043] Several roughing flat roll mills 30 are arranged sequentially at the output end of the roughing vertical roll mill 20 along the feed direction; the billet is rolled into an intermediate billet of a preset size through multiple passes of thickness direction rolling.
[0044] Preferably, a pressure measuring head is installed on the roughing roll to provide real-time feedback on the rolling force and dynamically adjust the reduction amount to prevent the mill from being overloaded.
[0045] The transition roller table 40 is located at the output end of the roughing flat roll mill 30 along the feed direction; it connects the intermediate roller table area between the roughing and finishing mills and can smoothly transport the rough-rolled plate to the finishing section.
[0046] The finishing vertical roll mill 50 is located at the output end of the transition roll table 40 along the feed direction; the finishing vertical roll mill 50 is located after the transition roll table 40 and is used for width control with higher precision requirements.
[0047] Several precision flat roll mills 60 are arranged sequentially along the feed direction at the output end of the precision vertical roll mill 50; the intermediate billet is rolled to the final thickness, and the plate shape and surface quality are controlled.
[0048] The billet to be processed is sequentially conveyed and rolled through the mill input roller table 10, two roughing vertical rolling mills 20, several roughing horizontal rolling mills 30, the transition roller table 40, the finishing vertical rolling mill 50, and several finishing horizontal rolling mills 60 to obtain the required finished product dimensions. The billet undergoes preliminary width adjustment (roughing vertical rolling), thickness roughing (roughing horizontal rolling), transition temperature adjustment and surface treatment, then fine width control (finishing vertical rolling), and finally thickness shaping (finishing horizontal rolling). Through a series of combined mills and roller tables, the original metal billet is gradually rolled into metal plates or strips that meet the dimensional accuracy and performance requirements.
[0049] This application also has the following beneficial effects:
[0050] 1. The roughing mill provides intermediate strip billets with low temperature drop and qualified dimensions as required by the finishing mill. By pressing down the strips on multiple stands of the finishing mill and adjusting the strip shape on the last few stands, qualified thin strip steel that meets the requirements can be obtained. This structure focuses on producing thin products while also taking into account the production capacity of thick products, thus achieving a more balanced performance.
[0051] 2. Finishing mill F9 requires a finishing mill and gear mill stand, with a main drive motor power of 2800kw, which is less investment than the roughing mill.
[0052] 3. Energy consumption analysis: The finishing mill has a small motor power value, resulting in low energy consumption per ton of steel;
[0053] 4. Temperature analysis: The roughing mill can produce intermediate billets of 32-35mm. The intermediate billets are short in length, have a small temperature drop, and have a good temperature for entering the finishing mill, which is more conducive to rolling thin strip steel products below 1.5mm.
[0054] 5. Product quality analysis: The roughing mill adopts a large reduction to adjust the thickness of the intermediate billet. The mill capacity and production adjustment of the finishing mill determine the product thickness tolerance and strip shape. Therefore, for the production of thin strip steel, the finishing mill F9 adopts a small reduction rolling and adjusts the strip shape at the same time, which can produce products with better quality.
[0055] As can be seen from the above description, this application achieves the following technical effects:
[0056] In this embodiment, an optimized unit structure is adopted. The billets to be processed are sequentially conveyed and rolled in an orderly manner through the mill input roller table 10, two roughing vertical rolling mills 20, several roughing flat rolling mills 30, the transition roller table 40, the finishing vertical rolling mill 50, and several finishing flat rolling mills 60 to obtain the required finished product size. This achieves the purpose of orderly rolling of the billets to be processed, thereby simplifying the unit structure and reducing production energy consumption. It also solves the technical problem that the existing hot-rolled strip main rolling mill equipment has a complex and redundant unit structure, which leads to reduced production efficiency and increased production energy consumption.
[0057] Furthermore, the mill input roller table 10 includes: a horizontally arranged first support 101, with a plurality of first conveying rollers 102 respectively arranged on the top of the support. It can be understood that the first support 101 constitutes a support frame, and the first conveying rollers 102 are arranged on the top of the support to form a horizontal conveying path; thus, stable conveying and centering positioning of the billet to be processed can be achieved.
[0058] Furthermore, the two roughing vertical rolling mills 20 respectively roll the billet to be processed in sequence to control the width dimension of the billet;
[0059] One of the roughing vertical rolling mills 20 is located between the mill input roller table 10 and the roughing flat rolling mill 30, while the other roughing vertical rolling mill 20 is located between the roughing flat rolling mill 30. It can be understood that by setting two roughing vertical rolling mills 20 at different positions, the first roughing vertical rolling mill 20 is immediately adjacent to the input roller table, applying initial lateral pressure to the billet to remove iron oxide scale; the second roughing vertical rolling mill 20 is located between the roughing flat rolling mills 30, applying secondary lateral pressure to the billet to compensate for the width rebound caused by flat rolling.
[0060] Furthermore, the number of the roughing flat rolling mills 30 is four. Two of the roughing flat rolling mills 30 are arranged sequentially between the roughing vertical rolling mills 20, and the other two roughing flat rolling mills 30 are arranged sequentially at the output end of the roughing vertical rolling mill 20 on the side away from the mill input roller table 10. It can be understood that the first two roughing flat rolling mills 30 use large-diameter rolls to perform heavy reduction (single-pass reduction rate 30-40%), rolling the billet from 250mm to 80mm. The latter two roughing flat rolling mills 30 use smaller-diameter rolls for finishing rolling (reduction rate 15-20%), outputting intermediate billets.
[0061] Differential Speed Rolling (DSR): The last two roughing mills employ a speed difference between the upper and lower rolls (e.g., 1.05:1) to enhance shear deformation, refine grains, and improve material toughness. Thermomechanical Control (TMCP): By combining rolling speed and cooling rate, the austenite recrystallization process is controlled to optimize the steel's strength and formability.
[0062] Furthermore, the four roughing and flat rolling mills 30 sequentially roll the billet to control its thickness and roll it into the required intermediate billet size. This allows for precise control of the billet thickness, thus ensuring the quality of subsequent processing.
[0063] Furthermore, the transition roller conveyor 40 includes a horizontally arranged second support 401, with a plurality of second conveying rollers 402 respectively arranged on the top of the support, for conveying the billet rolled by the roughing flat rolling mill 30 to the finishing vertical rolling mill 50. It is understood that this achieves a good conveying effect, thereby improving production efficiency.
[0064] Furthermore, the finishing vertical rolling mill 50 rolls the intermediate billet to control its width. This allows for precise rolling of the billet width, ensuring good processing accuracy.
[0065] Furthermore, the number of the aforementioned finishing flat roll mills 60 is nine stands. It is understood that the finishing flat roll mills 60 (nine stands, F1-F9) will employ optimized division of labor for the stands, including but not limited to the following: F1-F3: high-reduction rolling (single-pass reduction rate 25-30%), using high-speed steel rolls, resistant to high temperature and high pressure;
[0066] F4-F6: Main section for plate shape control, equipped with work roll lateral movement (such as CVC, SmartCrown) and bending roll system (positive bending / negative bending);
[0067] F7-F9: Micro-tension rolling and surface quality control, chrome plating or laser texturing of roll surfaces to improve the surface finish of strip steel.
[0068] Furthermore, the nine precision flat-roll mills 60 sequentially roll the intermediate billets to control their thickness and shape them into the desired finished product dimensions. This allows for precise thickness shaping, thereby achieving the desired finished product dimensions.
[0069] Furthermore, the bottoms of the two roughing vertical rolling mills 20, the plurality of roughing horizontal rolling mills 30, the finishing vertical rolling mill 50, and the plurality of finishing horizontal rolling mills 60 are respectively equipped with height adjustment mechanisms. It is understood that this enables flexible height adjustment, thereby better meeting actual usage needs. Preferably, the height adjustment mechanism can be a hydraulic lifting mechanism or an electric worm gear lift; it can be adjusted according to actual usage needs, and is not limited in this application.
[0070] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.
Claims
1. Hot-rolled strip steel main rolling mill plant line, characterized in that, include: Rolling mill input roller table (10); Two roughing vertical roll mills (20) are arranged sequentially along the feed direction at the output end of the mill input roller table (10); Several roughing flat roll mills (30) are arranged sequentially along the feed direction at the output end of the roughing vertical roll mill (20); The transition roller table (40) is located at the output end of the roughing flat roll mill (30) along the feed direction; A finishing vertical rolling mill (50) is disposed at the output end of the transition roller table (40) along the feed direction; and Several finishing flat roll mills (60) are arranged sequentially along the feed direction at the output end of the finishing vertical roll mill (50); The billet to be processed is sequentially conveyed and rolled through the mill input roller table (10), two roughing vertical roll mills (20), several roughing flat roll mills (30), the transition roller table (40), the finishing vertical roll mill (50), and several finishing flat roll mills (60) to obtain the required finished product size.
2. The hot strip main mill plant line according to claim 1, characterized in that, The mill input roller table (10) includes: a first support (101) arranged horizontally, and a plurality of first conveyor rollers (102) are respectively arranged on the top of the support.
3. The hot strip mill main mill installation production line according to claim 1, characterized in that, The two roughing vertical roll mills (20) respectively roll the billet to be processed in turn to control the width dimension of the billet; One of the roughing vertical roll mills (20) is located between the mill input roller table (10) and the roughing flat roll mill (30), and the other roughing vertical roll mill (20) is located between the roughing flat roll mill (30).
4. The hot strip mill main mill installation production line of claim 1, wherein, The number of the roughing flat roll mills (30) is four, with two roughing flat roll mills (30) arranged sequentially between the roughing vertical roll mills (20), and the other two roughing flat roll mills (30) arranged sequentially at the output end of the roughing vertical roll mills (20) on the side away from the mill input roller table (10).
5. The hot strip main mill plant line of claim 4, wherein, The four roughing flat roll mills (30) respectively roll the billet in sequence to control the billet thickness and roll the billet into the required intermediate billet size.
6. The hot strip mill main mill installation production line of claim 1, wherein, The transition roller table (40) includes: a horizontally arranged second support (401), and a plurality of second conveying rollers (402) are respectively arranged on the top of the support for conveying the billet rolled by the roughing flat roll mill (30) to the finishing vertical roll mill (50).
7. The hot strip mill main mill installation production line of claim 1, wherein, The finishing vertical roll mill (50) rolls the intermediate billet to control the width dimension of the intermediate billet.
8. The hot strip mill main mill installation production line of claim 1, wherein, The number of the aforementioned finishing flat roll mills (60) is nine.
9. The hot strip main mill plant line according to claim 8, characterized in that, The nine precision flat roll mills (60) sequentially roll the intermediate billets to control the thickness of the intermediate billets and roll them into the required finished product size.
10. The hot strip mill main mill installation production line of claim 1, wherein, The bottom of the two roughing vertical roll mills (20), several roughing horizontal roll mills (30), the finishing vertical roll mill (50) and several finishing horizontal roll mills (60) are respectively provided with height adjustment mechanisms.