Multi-length production system for long fixed-length steel plate

Abstract

The utility model relates to the technical field of steel plate production, and provides a multi-length production system for a long fixed-length steel plate, which comprises a stepping furnace connected with a plate blank feeding roller way and used for heating a plate blank; the descaling machine is arranged at the outlet end of the stepping furnace and used for removing oxide skin on the surface of the plate blank; the vertical rolling machine is arranged at the downstream of the descaling machine and is used for rolling the side edge of the plate blank and controlling the width of a rolled piece; the main rolling mill is connected with the vertical rolling mill and used for carrying out flat-roll rolling on the rolled piece and controlling the thickness of the rolled piece; the ACC cooling equipment is used for cooling the rolled piece; the flame cutting machine is connected with the ACC cooling equipment and is used for performing flame cutting on the rolled piece; the hot straightening machine is arranged at an outlet of the flame cutting machine and is used for straightening the cut rolled piece; the cooling bed is connected with the hot straightening machine and is used for cooling the rolled piece; and the shearing assembly is connected with the cooling bed through a roller way and is used for shearing the rolled piece treated by the cooling bed into a required size. And the production efficiency and the multi-length yield of products are improved.

Description

Technical Field

[0001] This utility model relates to the field of steel plate production technology, and in particular to a multi-length production system for long steel plates. Background Technology

[0002] In the steel plate production process, plate assembly design is a complex issue constrained by various factors, among which the length of the cooling bed strictly limits the length of the large plates in the assembly design. As a conveying device used to cool the steel plate during rolling, the length of the cooling bed directly determines the maximum length of the rolled steel plate. Due to the limited length of the cooling bed, the billet size cannot be increased indefinitely; otherwise, the length of the rolled steel plate will exceed the length of the cooling bed, making cooling and subsequent processing impossible.

[0003] However, for current medium and heavy plate production, the diversity of orders, the complexity of production scheduling, and the comprehensive consideration of multiple environmental factors have all brought challenges to traditional processes. Traditional processes are unable to meet the requirements of high precision and high efficiency, especially when producing diversified orders. The traditional fixed billet size and rolling mode are difficult to flexibly adapt to the production needs of steel plates of different specifications. Utility Model Content

[0004] The purpose of this invention is to provide a multi-length production system for long fixed-length steel plates, and to propose a solution for multi-length production of long fixed-length steel plates, thereby improving the production efficiency and product yield of steel plates.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a multi-length production system for long steel plates, comprising:

[0007] A walking beam furnace, which is connected to a slab feeding roller conveyor, is used to heat the slab.

[0008] A descaling machine is installed at the outlet end of the walking beam furnace and is used to remove oxide scale from the surface of the slab.

[0009] A vertical rolling mill is located downstream of the descaling machine and is used to roll the side edges of the slab to control the width of the rolled piece.

[0010] The main rolling mill, which is connected to the vertical rolling mill, is used to perform flat roll rolling on the workpiece and control the thickness of the workpiece;

[0011] An ACC cooling device, used for cooling rolled parts;

[0012] A flame cutting machine, which is connected to the ACC cooling equipment, is used to flame cut rolled pieces;

[0013] A hot straightening machine is installed at the outlet of the flame cutter and is used to straighten the cut rolled pieces;

[0014] A cooling bed, which is connected to the hot straightening machine, is used to cool the rolled workpiece;

[0015] A shearing assembly, which is connected to the cooling bed via a roller conveyor, shears the rolled piece after it has been processed by the cooling bed into the required size.

[0016] Furthermore, an intermediate cooling device, a thickness gauge, and a preheating straightener are sequentially installed between the main rolling mill and the ACC cooling equipment.

[0017] Furthermore, a thermal spraying device is also provided between the thermal straightening machine and the cooling bed.

[0018] Furthermore, the shearing assembly includes a head cutter, a double-sided cutter, and a length cutter arranged sequentially along the forward direction of the rolled piece to be sheared.

[0019] Furthermore, the distance between the head cutter and the double-sided cutter is 60m.

[0020] Furthermore, the distance between the double-sided shear and the fixed-length shear is 80m.

[0021] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0022] This invention discloses a multi-length steel plate production system. By installing a flame cutter between the ACC cooling equipment and the hot straightener, it enables online cutting of multi-length steel plates, avoiding the drawback of existing technologies that require the rolling mill to be stopped for cutting. This improves steel plate production efficiency and reduces time and cost in intermediate steps. Furthermore, based on the length limitations of the cooling bed in the system, it can meet the production needs of steel plates of different specifications. Attached Figure Description

[0023] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0024] Figure 1 This is a schematic diagram of the production process for long steel plates in the prior art provided in this utility model.

[0025] Figure 2 This is a flowchart illustrating a multi-length production system for long steel plates provided in this utility model.

[0026] The reference numerals in the attached figures are explained as follows:

[0027] 1. Walking beam furnace; 2. Descaling machine; 3. Vertical rolling mill; 4. Main rolling mill; 5. ACC cooling equipment; 6. Flame cutting machine; 7. Hot straightener; 8. Cooling bed; 9. Shearing assembly; 901. Head cutter; 902. Double-sided shear; 903. Length cutter; 10. Intermediate cooling device; 11. Thickness gauge; 12. Preheating straightener; 13. Thermal inkjet printing device. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] See Figure 1 The existing production process for long steel plates specifically includes, in sequence, a walking beam furnace 1, a descaling machine 2, a vertical rolling mill 3, a main rolling mill 4, an intermediate cooling equipment 10, a thickness gauge 11, a preheating straightener 12, an ACC cooling equipment 5, a hot straightener 7, a thermal spraying device 13, a cooling bed 8, and a shearing assembly 9 on the production line.

[0030] Regarding the existing production process for long-length steel plates, the production of steel plates is limited by the length of the cooling bed 8. If the length of the intermediate steel plate billet exceeds the length of the cooling bed 8, the production line will stop, requiring the intermediate steel plate billet to be cut before production can continue. However, cutting means shutting down the entire production line for billet cutting, which undoubtedly increases the corresponding time and economic costs, reduces production efficiency, and significantly increases labor costs.

[0031] Therefore, in this embodiment of the invention, a multi-length production system for long steel plates is proposed, see reference. Figure 2 Specifically, it includes a walking beam furnace 1, a descaling machine 2, a vertical rolling mill 3, a main rolling mill 4, an ACC cooling system 5, a flame cutting machine 6, a hot straightening machine 7, a thermal spraying device 13, a cooling bed 8, and a shearing assembly 9.

[0032] Compared with the prior art, in this embodiment, a flame cutter 6 is set after the ACC cooling device 5. The purpose of the flame cutter 6 is to realize online cutting of the slab, so that the cut slab can adapt to the length limit of the cooling bed 8, improve production efficiency, and avoid production line shutdown.

[0033] In this embodiment, the walking beam furnace 1 is connected to the feeding roller conveyor of the slab and is used to heat the slab; the descaling machine 2 is set at the outlet end of the walking beam furnace 1 and removes the oxide scale on the surface of the slab by high pressure water. The specific descaling water pressure can be reasonably arranged according to the needs.

[0034] The vertical rolling mill 3 is located downstream of the descaling mill 2 and is used to roll the sides of the slab to control the width of the rolled piece. The main rolling mill 4 is located after the vertical rolling mill 3 and is used for flat rolling of the rolled piece to control its thickness.

[0035] The ACC cooling unit 5 is used to rapidly and uniformly cool the rolled workpiece to ensure that it maintains the required material properties and dimensional accuracy during production. The specific cooling rate can be adjusted as needed.

[0036] In addition, in this embodiment, an intermediate cooling device 10, a thickness gauge 11, and a preheating straightener 12 are sequentially arranged between the aforementioned main rolling mill 4 and ACC cooling equipment 5.

[0037] Intermediate cooling device 10 is used to initially cool the rolled piece after processing by the main rolling mill 4 to prevent deformation or surface defects caused by overheating. The intermediate cooling device 10 helps to control the temperature of subsequent processes and improve the forming performance of the rolled piece.

[0038] The thickness gauge 11 is used to monitor the thickness of the rolled piece to assist operators in judging the uniformity and stability during the rolling process. By monitoring the thickness, rolling parameters can be adjusted in a timely manner to avoid the rolled piece being too thick or too thin, which would affect the product yield.

[0039] The function of the preheating straightener 12 is to preheat the cooled rolled workpiece to further eliminate internal stress and perform preliminary shape correction. Appropriate heating of the rolled workpiece can improve its plasticity and reduce its brittleness, which is beneficial for subsequent forming and processing. At the same time, the straightening process can improve the flatness and dimensional accuracy of the finished product.

[0040] In this embodiment, the rolled piece cut by the flame cutting machine 6 is then fed into the hot straightening machine 7. During the flame cutting process, the rolled piece deforms due to thermal stress. The hot straightening machine 7 can restore the rolled piece to its near-original state through a combination of heating and mechanical force. The rolled piece treated with hot straightening has more accurate dimensions and shape, which helps with fitting and assembly during subsequent processing and reduces processing errors. Furthermore, it can effectively release internal stress, reducing the risk of cracking or other quality problems in subsequent processing.

[0041] After hot straightening, the rolled piece is first sent to the thermal spraying device 13 for marking, and then sent to the cooling bed 8 for cooling. Because the temperature of the rolled piece increases significantly after being processed by the hot straightener 7, the cooling bed 8 effectively reduces its temperature. The dimensions of the cooled rolled piece are more stable, preventing thermal expansion or contraction caused by temperature changes. Furthermore, cooling on the cooling bed helps to solidify the internal structure of the rolled piece, thereby reducing or eliminating residual stress after cooling. The specific cooling rate can be rationally arranged according to needs. The specific number of cooling beds can also be rationally arranged according to production requirements.

[0042] In this embodiment, a shearing assembly 9 is also provided behind the cooling bed 8. The shearing assembly 9 cuts and separates the cooled rolled workpiece to ensure that it reaches the required size or shape. Specifically, in this embodiment, the shearing assembly 9 includes a head cutter 901, a double-sided cutter 902, and a length cutter 903 arranged sequentially along the forward direction of the rolled workpiece.

[0043] The head-cutting shear 901 is used to remove the irregular head of the rolled piece and can be a dual-axis, double-eccentric rolling shear. The double-sided shear 902 is used to remove the irregular sides of the rolled piece and can be a tri-axis, triple-eccentric rolling shear. In this embodiment, the distance between the head-cutting shear 901 and the double-sided shear 902 is 60m. This distance ensures that the cut steel plate has sufficient space for initial positioning and stable transmission, avoiding alignment errors caused by shearing vibration. It also provides a buffer area for operators, facilitating quick handling of unexpected shutdowns or equipment maintenance. The length-cutting shear 903 is used to cut the rolled piece to length. In this embodiment, the distance between the double-sided shear 902 and the length-cutting shear 903 is 80m. This distance allows the steel plate to cool naturally via the roller conveyor after the double-sided shear 902 completes side trimming, eliminating residual stress and reducing the risk of deformation during shearing by the length-cutting shear 903. Furthermore, the automatic measurement system of the distance-matching fixed-length shear 903 ensures precise synchronization between length detection and shearing action, improving yield. The shearing assembly in this embodiment boasts high production efficiency, high yield, and close cooperation between its components.

[0044] The aforementioned distance configuration achieves efficient and continuous production operations, avoiding spatial redundancy or congestion between shearing processes and ensuring smooth production line operation. It also reduces the impact of vibration and temperature changes during steel plate transport on dimensional accuracy. Adaptable to the multi-length production needs of different steel plate specifications, the shearing parameters can be flexibly adjusted.

[0045] In summary, the multi-length steel plate production system disclosed in this utility model adds a flame cutting machine 6 after the ACC cooling equipment 5, achieving rapid cutting while reducing the transportation and waiting time of the rolled piece from cooling to cutting, thus improving production efficiency. Furthermore, it can achieve high-precision and high-efficiency multi-length steel plate production within the existing length limitations of the cooling bed 8, meeting the production needs of steel plates of different specifications.

[0046] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A system for producing multiple lengths of long steel plates, characterized in that, include: Walking beam furnace (1), which is connected to the slab feeding roller conveyor and is used to heat the slab; Descaling machine (2), the descaling machine (2) is set at the outlet end of the walking beam furnace (1) and is used to remove oxide scale from the surface of the slab; Vertical rolling mill (3), which is located downstream of the descaling machine (2), is used to roll the side of the slab and control the width of the rolled piece; The main rolling mill (4) is connected to the vertical rolling mill (3) and is used to perform flat rolling on the workpiece and control the thickness of the workpiece. ACC cooling device (5), the ACC cooling device (5) is used to cool the rolled piece; A flame cutting machine (6) is connected to the ACC cooling device (5) and is used to flame cut the rolled piece; A hot straightening machine (7) is installed at the outlet of the flame cutting machine (6) and is used to straighten the cut rolled pieces; A cooling bed (8) is connected to the hot straightening machine (7) and is used to cool the rolled workpiece. The shearing assembly (9) is connected to the cooling bed (8) via a roller conveyor to shear the rolled piece after it has been processed by the cooling bed (8) into the required size.

2. A multi-length production system for long steel plates according to claim 1, characterized in that, An intermediate cooling device (10), a thickness gauge (11), and a preheating straightener (12) are also sequentially arranged between the main rolling mill (4) and the ACC cooling equipment (5).

3. A multi-length production system for long steel plates according to claim 1, characterized in that, A thermal inkjet printing device (13) is also provided between the thermal straightening machine (7) and the cooling bed (8).

4. A multi-length production system for long steel plates according to claim 1, characterized in that, The shearing assembly (9) includes a head cutter (901), a double-sided cutter (902), and a length cutter (903) arranged sequentially along the forward direction of the rolled piece to be sheared.

5. A multi-length production system for long steel plates according to claim 4, characterized in that, The distance between the head cutter (901) and the double-sided cutter (902) is 60m.

6. A multi-length production system for long steel plates according to claim 4, characterized in that, The distance between the double-sided shear (902) and the fixed-length shear (903) is 80m.

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