Single-stand multi-roll mill asynchronous self-adaptive cold continuous rolling unit for oriented silicon steel thin strip

Abstract

The utility model relates to the field of metal alloy material processing, in particular to a single-stand multi-roll mill asynchronous self-adaptive cold continuous rolling unit for oriented silicon steel thin strips and a rolling method of the single-stand multi-roll mill asynchronous self-adaptive cold continuous rolling unit, which comprises an inlet pinch roll, an outlet pinch roll, a stand, a screw-down device, a working roll, a loop tension roll, a main transmission system and a sectional process lubricating system, the two ends of the working roller are fixed on the rack through bearing seats; loop tension rollers are distributed on the two sides of the working roller and installed on the outer side of the machine frame. The inlet pinch roll and the outlet pinch roll are respectively arranged on the outer side of the loop tension roll; the working rollers comprise an upper driving roller, a lower driving roller and a plurality of middle driven rollers; the two driving rollers are driven by a main transmission system, loop tension rollers are arranged on one sides of the driven rollers, and loop tension on the two sides of every two adjacent driven rollers is arranged in a crossed mode. Multi-pass continuous rolling, such as five-pass continuous rolling, can be achieved in a single rack, larger rolling reduction can be achieved in one rolling process, the total rolling reduction rate can reach more than 80%, and the rolling production efficiency of ultra-thin strips is improved.

Description

Technical Field

[0001] This utility model relates to the field of metal alloy material processing, and is particularly applicable to the production of thin strip materials. In particular, it relates to an asynchronous adaptive cold continuous rolling mill unit for single-stand multi-roll rolling mills of oriented silicon steel thin strip. Background Technology

[0002] With the rise of new manufacturing industries such as micro-manufacturing and microelectromechanical systems, the market demand for ultra-thin silicon steel strip is very urgent.

[0003] Currently, most ultra-thin strips made of metals, alloys, and metal matrix composites are produced through rolling, using multi-roll mills for reversible rolling and continuous rolling processes. Traditional multi-roll mills, such as the Sendzimir 20-roll mill, employ multiple passes for repeated rolling, resulting in low production efficiency and high costs for ultra-thin strips. Continuous rolling mills, typically five-stand mills, require large investments, occupy a large area, have complex structures, and incur high production, operation, and maintenance costs. Furthermore, the lack of asynchronous rolling capabilities results in low thinning capacity, which is detrimental to the formation of surface texture in silicon steel.

[0004] Patent CN106944479A discloses a single-stand continuous rolling mill for thin strip and its implementation method. It has multiple work rolls of equal or unequal diameters, including active rolls and passive rolls. Multi-pass asynchronous rolling or asynchronous-synchronous rolling is implemented by controlling the linear speed of the active rolls. As the number of rolling passes increases, the linear speed of each roll increases sequentially along the rolling direction. The last pass can use asynchronous rolling or synchronous rolling. In synchronous rolling, the last two rolls have equal diameters and equal linear speeds. Alternatively, multiple unequal work rolls, including active rolls and passive rolls, are used. Larger diameter rolls are active rolls, and smaller diameter rolls are passive rolls. Multi-pass asynchronous rolling or asynchronous-synchronous rolling is implemented by controlling the linear speed of the active rolls. As the number of rolling passes increases, the linear speed of each roll increases sequentially along the rolling direction. The last pass can use asynchronous rolling or synchronous rolling. In synchronous rolling, the last two rolls have equal diameters and equal roll drive speeds. For conventional four-stand and five-stand continuous rolling mills, the total reduction rate is greater than 70%, and the strip elongation is three to four times, meaning the exit speed of the mill is three to four times the entry speed. However, this patent uses a horizontal arrangement, requiring the two tension rolls to extend underground, which is very inconvenient to operate. The three electric motors need to be arranged on both sides, making it difficult to distinguish between the drive side and the operating side, which not only hinders operation but also increases safety hazards. ③ The space for the looper tension rolls is limited, so the reduction rate cannot be large each time, often requiring reversible rolling, resulting in low operating speed and low production efficiency. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the existing technology and provide an asynchronous adaptive cold continuous rolling mill unit for oriented silicon steel strip with a single stand multi-roll mill that can achieve multi-pass continuous rolling and has a stronger thinning capacity, as well as its rolling method.

[0006] The technical solution to achieve the purpose of this utility model is: an asynchronous adaptive cold continuous rolling mill unit for single-stand multi-roll mills of oriented silicon steel strip, including an inlet pinch roll, an outlet pinch roll, a stand, a pressing device, a work roll, a looper tension roll, a main drive system, and a segmented process lubrication system. The two ends of the work roll are fixed to the stand by bearing seats; the looper tension rolls are distributed on both sides of the work roll and installed on the outside of the stand; the inlet pinch roll and the outlet pinch roll are respectively installed on the outside of the looper tension roll; the work roll includes two upper and lower active rolls and multiple passive rolls in the middle; the two active rolls are driven by the main drive system, and a looper tension roll is arranged on one side of the passive roll, with the looper tension rolls on both sides of adjacent passive rolls arranged crosswise.

[0007] In the above technical solution, there are six working rollers, with their centers aligned in a straight line. From top to bottom, they are the first working roller, the second working roller, the third working roller, the fourth working roller, the fifth working roller, and the sixth working roller. The first and sixth working rollers are active rollers, while the second, third, fourth, and fifth working rollers are passive rollers. The diameter of the two active rollers is larger than the diameter of the four passive rollers.

[0008] In the above technical solution, the pressing device is a hydraulic cylinder, which is located above the first working roll bearing seat; a high-strength bending roller device is also provided on the outside of the first working roll bearing seat, including a high-strength bending roller seat and a high-strength bending roller cylinder, and the high-strength bending roller cylinder is fixed in the frame through the high-strength bending roller seat.

[0009] In the above technical solution, a roll gap adjustment device is provided below the sixth working roll bearing seat; and a hydraulic balancing device is provided on the passive roll bearing seat.

[0010] In the above technical solution, the looper tension roller is mounted on a bracket, which is fixed to the outside of the machine frame; there are four looper tension rollers, which are arranged crosswise on the outside of the second working roller, the third working roller, the fourth working roller, and the fifth working roller, and the looper tension roller is driven to move horizontally by a hydraulic cylinder with a servo system.

[0011] In the above technical solution, the first work roll and the sixth work roll are driven by a centralized main drive system or two independent main drive systems, and the main drive system is located on the drive side of the rolling mill.

[0012] In the above technical solution, the main drive system includes an upper main drive system and a lower main drive system. The upper main drive system drives the first working roller, the second working roller, and the third working roller, while the lower main drive system drives the third working roller, the fourth working roller, and the fifth working roller.

[0013] In the above technical solution, a segmented process lubrication system is provided between the two working roll gaps, and the segmented process lubrication system is located below the strip at the roll gap inlet.

[0014] After adopting the above technical solution, this utility model has the following positive effects:

[0015] 1. This utility model can realize multi-pass continuous rolling in a single stand, such as five-pass rolling. A larger reduction can be achieved in one rolling pass, and the total reduction rate can reach more than 80%, which improves the production efficiency of ultra-thin strip rolling. One stand can replace multiple stands, reducing equipment weight, investment and floor space, while production, operation and maintenance costs are also reduced accordingly.

[0016] 2. The inlet and outlet speeds of this utility model are set, and the speeds of other rolls and strip are adaptively asynchronously continuously rolled according to the total rolling force, the reduction rate between each roll, and the tension of each set of loop tension roll devices.

[0017] 3. This utility model has a powerful bending roller device and multiple sets of segmented process lubrication systems, which makes the strip shape control capability better; and it adopts alternating asynchronous rolling of the upper and lower surfaces of the strip, which greatly reduces the rolling force, reduces the equipment load, reduces the equipment weight, and has significant energy-saving, emission-reduction and material-saving effects. Attached Figure Description

[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0019] Figure 1 This is a schematic diagram of the relationship between the roll system, the workpiece, and the rolling passes in Example 1.

[0020] Figure 2 This is a schematic diagram of the relationship between the roll system, the workpiece, and the rolling passes in Example 2.

[0021] Figure 3 This is a schematic diagram of the archway and roller system structure in Example 1;

[0022] Figure 4 This is a schematic diagram of the archway and roller system structure in Example 2;

[0023] Figure 5 This is a side view of the rolling mill;

[0024] Figure 6 This is a schematic diagram of the hydraulic balance of the rolling mill;

[0025] In the diagram: 1. Inlet pinch roll; 2. Outlet pinch roll; 3. Frame; 4. Pressing device; 5. Work roll; 5-1. First work roll; 5-2. Second work roll; 5-3. Third work roll; 5-4. Fourth work roll; 5-5. Fifth work roll; 5-6. Sixth work roll; 6. Loose tension roll; 6-1. First loose tension roll; 6-2. Second loose tension roll; 6-3. Third loose tension roll; 6-4. Fourth loose tension roll; 7. Main drive system; 8. Segmented process lubrication system; 9. Bearing housing; 9-1. First work roll bearing housing; 9-2. Passive roll bearing housing; 10. High-strength bending roll device; 10-1. High-strength bending roll seat; 10-2. High-strength bending roll cylinder; 11. Steel strip. Detailed Implementation

[0026] (Example 1)

[0027] See Figures 1-6 This utility model relates to an asynchronous adaptive cold continuous rolling mill unit for single-stand multi-roll mills of oriented silicon steel strip, including an inlet pinch roll 1, an outlet pinch roll 2, a stand 3, a pressing device 4, a work roll 5, a loop tension roll 6, a main drive system 7, and a segmented process lubrication system 8. The two ends of the work roll are fixed to the stand 3 by bearing seats 9. The loop tension roll 6 is distributed on both sides of the work roll 5 and installed on the outside of the stand 3. The inlet pinch roll 1 and the outlet pinch roll 2 are respectively installed on the outside of the loop tension roll 6. The work roll 5 includes two upper and lower active rolls and multiple passive rolls in the middle. The two active rolls are driven by the main drive system 7. The loop tension roll 6 is arranged on one side of the passive roll, and the loop tension rolls 6 on both sides of adjacent passive rolls are arranged crosswise.

[0028] In this embodiment, there are six working rollers 5, with their centers aligned in a straight line. From top to bottom, they are the first working roller 5-1, the second working roller 5-2, the third working roller 5-3, the fourth working roller 5-4, the fifth working roller 5-5, and the sixth working roller 5-6. Among them, the first working roller 5-1 and the sixth working roller 5-6 are active rollers, while the second working roller 5-2, the third working roller 5-3, the fourth working roller 5-4, and the fifth working roller 5-5 are passive rollers. The diameter of the two active rollers is larger than the diameter of the four passive rollers.

[0029] The pressing device 4 of this utility model is a hydraulic cylinder, which is set above the first work roll bearing seat 9-1. A high-pressure bending roll device 10 is also provided outside the first work roll bearing seat 9-1, including a high-pressure bending roll seat 10-1 and a high-pressure bending roll cylinder 10-2. The high-pressure bending roll cylinder 10-2 is fixed inside the frame 3 through the high-pressure bending roll seat 10-1. A roll gap adjustment device is provided below the bearing seat of the sixth work roll 5-6. Hydraulic balancing devices are provided on the passive roll bearing seats 9-2. The looper tension roll 6 is mounted on a bracket, which is fixed outside the frame 3. There are four looper tension rolls 6, arranged crosswise outside the second work roll 5-2, the third work roll 5-3, the fourth work roll 5-4, and the fifth work roll 5-5. The looper tension roll 6 is driven horizontally by a hydraulic cylinder with a servo system. The first work roll 5-1 and the sixth work roll 5-6 are driven by a centralized main drive system 7 or two independent main drive systems 7, which are located on the mill drive side. In this embodiment of the utility model, the main drive system 7 has two sets, including an upper main drive system 7-1 and a lower main drive system 7-2. The upper main drive system 7-1 drives the first working roller 5-1, the second working roller 5-2, and the third working roller 5-3, while the lower main drive system 7-2 drives the third working roller 5-3, the fourth working roller 5-4, and the fifth working roller 5-5.

[0030] A segmented process lubrication system 8 is provided between the roll gaps of the two working rolls 5, and the segmented process lubrication system 8 is located below the strip at the roll gap inlet.

[0031] The rolling method using this single-stand multi-roll asynchronous adaptive cold continuous rolling mill for grain-oriented silicon steel strip includes the following steps:

[0032] Step 1: The hydraulic cylinder is raised, and the first working roll 5-1 to the sixth working roll 5-6 are successively positioned at their maximum roll gap under the action of hydraulic balance, while each looper tension roll 6 retracts to its minimum position; first, the strip head 11 to be rolled passes through the inlet pinch roll 1, which conveys the strip head forward to the upper or lower end of the first working roll 5-1; if it reaches the upper end of the first working roll 5-1, see... Figure 1 (Example 1) The belt head is then passed around the first working roll 5-1 and through the roll gap at the bottom of the first working roll 5-1, around the first loose tension roll 6-1, through the roll gap formed by the second working roll 5-2 and the third working roll 5-3, around the second loose tension roll 6-2, through the roll gap formed by the third working roll 5-3 and the fourth working roll 5-4, around the third loose tension roll 6-3, through the roll gap formed by the fourth working roll 5-4 and the fifth working roll 5-5, around the fourth loose tension roll 6-5, through the roll gap formed by the fifth working roll 5-5 and the sixth working roll 5-6, and out from the bottom of the sixth working roll 6-6. It passes through the exit pinch roll 2 and enters the winding machine, where the belt head is clamped and wound around the drum 2-3 times, completing the belt threading process.

[0033] For example, the inlet pinch roller 1 conveys the belt head forward to the lower end of the first working roller 5-1, see Figure 2 (Example 2) The tape passes through the gap between the first working roll 5-1 and the second working roll 5-2, around the first loose tension roll 6-1, then through the gap between the second working roll 5-2 and the third working roll 5-3, around the second loose tension roll 6-2, through the gap between the third working roll 5-3 and the fourth working roll 5-4, around the third loose tension roll 6-3, through the gap between the fourth working roll 5-4 and the fifth working roll 5-5, around the fourth loose tension roll 6-4, through the gap between the fifth working roll 5-5 and the sixth working roll 5-6, and through the exit pinch roll 2 into the winding machine. The tape head is clamped and wound around the drum 2-3 times, completing the tape threading process.

[0034] Step 2: Start the uncoiler and coiler to establish tension for the entire unit;

[0035] Step 3: Start the hydraulic cylinder and segmented process lubrication system 8, and simultaneously start the main drive system (7), the strip exit speed V 出 ≥3 to 5 times V 入 The first loop tension roller 6-1 is pushed outward to set a certain tension for the strip, thus completing the start-up and low-speed operation of the unit;

[0036] Step 4: Continuous acceleration. Based on the difference between the strip exit thickness and the target thickness, adjust the hydraulic cylinder to press down, so that the strip exit thickness matches the target thickness.

[0037] Step 5: Adjust the bending force of the high-strength bending roller device 10 and the corresponding cooling section flow rate of the segmented process lubrication system 8 according to the exit strip shape, so that the exit strip shape is consistent with the target strip shape.

[0038] The inlet speed of the strip at point 5-1 of the first working roll is set to V. 12 The exit speed of the strip on the sixth working roll (5-6) is set to V. 61 The speeds of the upper and lower surfaces of the second working rolls 5-2 to the fifth working rolls 5-5 are respectively set to V. 21 V 22 V 31 V 32 V 41 V 42 V 51 V 52 The adaptive speed of the work roll satisfies: V 61 ≥V 52 =V 51 ≥V 42 =V 41 ≥V 32 =V31 ≥V 22 =V 21 ≥V 12 The adaptive speed of the strip surface satisfies: V 61m ≥V 52m ≥V 51m ≥V 42m ≥V 41m ≥V 32m ≥V 31m ≥V 22m ≥V 21m ≥V 12m This enables alternating asynchronous rolling of the upper and lower surfaces of the strip.

[0039] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An asynchronous adaptive cold continuous rolling mill unit for single-stand multi-roll rolling mill of oriented silicon steel strip, comprising an inlet pinch roll (1), an outlet pinch roll (2), a stand (3), a pressing device (4), a work roll (5), a looper tension roll (6), a main drive system (7), and a segmented process lubrication system (8), wherein the two ends of the work roll are fixed to the stand (3) by bearing seats (9); the looper tension roll (6) is distributed on both sides of the work roll (5) and installed on the outside of the stand (3); the inlet pinch roll (1) and the outlet pinch roll (2) are respectively installed on the outside of the looper tension roll (6); characterized in that: The working roller (5) includes two active rollers at the top and bottom and multiple passive rollers in the middle; the two active rollers are driven by the main drive system (7), and a loose tension roller (6) is arranged on one side of the passive roller, and the loose tension rollers (6) on both sides of the two adjacent passive rollers are arranged crosswise.

2. The asynchronous adaptive cold continuous rolling mill unit for single-stand multi-roll mills of grain-oriented silicon steel strip as described in claim 1, characterized in that: There are six working rollers (5), and the centers of the six working rollers (5) are on a straight line. From top to bottom, they are the first working roller (5-1), the second working roller (5-2), the third working roller (5-3), the fourth working roller (5-4), the fifth working roller (5-5), and the sixth working roller (5-6). Among them, the first working roller (5-1) and the sixth working roller (5-6) are active rollers, and the second working roller (5-2), the third working roller (5-3), the fourth working roller (5-4), and the fifth working roller (5-5) are passive rollers. The diameter of the two active rollers is larger than the diameter of the four passive rollers.

3. The asynchronous adaptive cold continuous rolling mill unit for single-stand multi-roll mills of grain-oriented silicon steel strip as described in claim 2, characterized in that: The pressing device (4) is a hydraulic cylinder, which is located above the first working roller bearing seat (9-1); a high-strength bending roller device (10) is also provided on the outside of the first working roller bearing seat (9-1), including a high-strength bending roller seat (10-1) and a high-strength bending roller cylinder (10-2), and the high-strength bending roller cylinder (10-2) is fixed in the frame (3) through the high-strength bending roller seat (10-1).

4. The asynchronous adaptive cold continuous rolling mill unit for single-stand multi-roll mills of grain-oriented silicon steel strip as described in claim 2, characterized in that: The sixth working roll (5-6) bearing seat is equipped with a roll gap adjustment device below it; the passive roll bearing seat (9-2) is equipped with a hydraulic balancing device.

5. The asynchronous adaptive cold continuous rolling mill unit for single-stand multi-roll mills of grain-oriented silicon steel strip as described in claim 2, characterized in that: The loose tension roller (6) is mounted on a bracket, which is fixed to the outside of the frame (3). There are four loose tension rollers (6), which are arranged crosswise on the outside of the second working roller (5-2), the third working roller (5-3), the fourth working roller (5-4), and the fifth working roller (5-5), and are driven to move horizontally by a hydraulic cylinder with a servo system.

6. The asynchronous adaptive cold continuous rolling mill unit for single-stand multi-roll mills of grain-oriented silicon steel strip as described in claim 2, characterized in that: The first work roll (5-1) and the sixth work roll (5-6) are driven by a centralized main drive system (7) or two independent main drive systems (7), which are located on the drive side of the rolling mill.

7. The asynchronous adaptive cold continuous rolling mill unit for single-stand multi-roll mills of grain-oriented silicon steel strip as described in claim 6, characterized in that: The main drive system (7) includes an upper main drive system (7-1) and a lower main drive system (7-2). The upper main drive system (7-1) drives the first working roller (5-1), the second working roller (5-2), and the third working roller (5-3). The lower main drive system (7-2) drives the third working roller (5-3), the fourth working roller (5-4), and the fifth working roller (5-5).

8. The single-stand multi-roll asynchronous adaptive cold continuous rolling mill for grain-oriented silicon steel strip as described in any one of claims 1 to 7, characterized in that: A segmented process lubrication system (8) is provided between the roll gaps of the two working rolls (5), and the segmented process lubrication system (8) is located below the strip at the roll gap inlet.

Images