An ultra-thin gauge high-grade electrical steel cold continuous rolling mill outlet tension control system
By introducing a combination design of inlet pinch roll group, four-roll vertical tension roll device and coiler into the cold continuous rolling mill, the problem of unstable tension control at the exit of the last stand was solved, and high-speed and stable rolling of ultra-thin high-grade electrical steel and high yield were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN QIAN YE ENG TECH CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-06-05
AI Technical Summary
When rolling ultra-thin high-grade electrical steel, the existing cold rolling mill has unstable tension control at the exit of the last stand, resulting in large deviations in strip thickness, low yield, and inability to achieve high-speed and stable rolling.
An exit tension control system for a cold continuous rolling mill for ultra-thin high-grade electrical steel was designed, including an inlet pinch roll group, a four-roll vertical tension roll device, a strip shear and a coiler. The tension adjustment device enables two-stage control of the exit tension and coiling tension of the last stand. Combined with a hydraulic cylinder and a rotary drive mechanism, it ensures that the steel strip maintains stable tension during the slitting process.
It has achieved high-speed and stable rolling of ultra-thin high-grade electrical steel with zero thickness difference in finished products, which has significantly improved the yield.
Smart Images
Figure CN224322073U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cold continuous rolling technology for electrical steel, and in particular to an outlet tension control system for a cold continuous rolling mill for ultra-thin high-grade electrical steel. Background Technology
[0002] Currently, high-grade electrical steel is a core soft magnetic material for new energy vehicles and power transmission and transformation equipment. Non-oriented electrical steel is the core material for manufacturing drive motors in new energy vehicles, while oriented electrical steel is the core material for manufacturing transformer cores, a key piece of equipment for power grids. Against the backdrop of high-quality development in the new energy vehicle and power transmission and transformation equipment industries, the market for high-grade electrical steel is experiencing explosive growth, especially for thin-gauge high-grade electrical steel with a thickness of ≤0.2mm. The industry has now achieved technological breakthroughs in the cold rolling of thin-gauge high-grade non-oriented and oriented silicon steel using cold rolling mills, which can continuously meet the industry's demand for this type of electrical steel.
[0003] Currently, the mainstream process layout of cold rolling mills adopts the classic layout of carbon steel cold rolling, namely, the pinch rolls before the flying shear, the flying shear, and the Carrousel coiler. The exit tension of the last stand is mainly provided by the coiler, which has a relatively small coiling tension, making it difficult to control the flatness of ultra-thin high-grade electrical steel. Secondly, the exit tension of the last stand provided by the pinch rolls before the flying shear is relatively small during the flying shear shearing process, and the exit tension of the strip will fluctuate greatly for a period of time. This will cause a large deviation in strip thickness and seriously reduce the yield. At the same time, due to the problem of tension loss at the exit of the last stand during the shearing, it is impossible to achieve high-speed stable rolling of 1500m / min for ultra-thin electrical steel with a thickness ≤0.2mm.
[0004] Therefore, it is necessary to develop an outlet tension control system for ultra-thin high-grade electrical steel cold rolling mills to solve the above-mentioned technical problems. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide an outlet tension control system for a cold continuous rolling mill for ultra-thin high-grade electrical steel, which effectively overcomes the defects of the prior art.
[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:
[0007] An exit tension control system for an ultra-thin, high-grade electrical steel cold rolling mill includes an inlet pinch roll group, a tension regulating device, a strip shearing machine, and a coiler, which are arranged sequentially from front to back on the exit side of the last stand of the cold rolling mill. The tension regulating device is used to regulate the tension of the steel strip passing through it and to convey it backward. The strip shearing machine is used to shear the steel strip passing through it, and the coiler is used to wind the steel strip into coils.
[0008] Based on the above technical solution, the present invention can be further improved as follows.
[0009] Furthermore, the aforementioned inlet pinch roller assembly includes a first frame, an upper inlet pinch roller, a lower inlet pinch roller, and a first lifting device. The upper inlet pinch roller and the lower inlet pinch roller extend in the left-right direction and are distributed vertically at intervals. The two ends of the upper inlet pinch roller are mounted in the first frame via a first upper bearing seat rotatably assembled thereto. The two ends of the lower inlet pinch roller are slidably mounted in the first frame via a first lower bearing seat rotatably assembled thereto. The first lifting device is connected to the two lower bearing seats and is used to drive the two lower bearing seats to move the lower inlet pinch roller up and down to be close to or away from the upper inlet pinch roller. The steel strip passes between the upper inlet pinch roller and the lower inlet pinch roller.
[0010] Furthermore, the aforementioned tension adjustment device is a four-roll vertical tension roller device, which includes a second frame and tension rollers rotatably mounted in the second frame. The four tension rollers are tension roller I, tension roller II, tension roller III, and tension roller IV. Tension roller I is located below tension roller II, tension roller III is located above tension roller IV, and tension rollers III and IV are located behind tension rollers I and II. On either the left or right side of the second frame, there are a first rotary drive mechanism, a second rotary drive mechanism, a third rotary drive mechanism, and a fourth rotary drive mechanism that correspond one-to-one with and are connected to the ends of tension rollers I, II, III, and IV, respectively. A steel strip tension adjustment assembly is located below tension roller IV.
[0011] Furthermore, a first pressure roller extending laterally is provided below and / or behind the tension roller I. Both ends of the first pressure roller are slidably mounted in the second frame via first pressure roller bearing seats rotatably assembled therewith. The second frame is provided with a first telescopic drive mechanism connected to the first pressure roller bearing seats at both ends. The first telescopic drive mechanism is used to drive the first pressure roller bearing seats to move the first pressure roller closer to or further away from the tension roller I. A second pressure roller extending laterally is provided above the tension roller II. Both ends of the second pressure roller are slidably mounted in the second frame via second pressure roller bearing seats rotatably assembled therewith. The frame is provided with a second telescopic drive mechanism connected to the bearing seats of the second pressure rollers at both ends. The second telescopic drive mechanism is used to drive the bearing seats of the second pressure rollers to move the second pressure rollers closer to or further away from the tension rollers II. Above the tension rollers III, there is a third pressure roller extending to the left and right. The two ends of the third pressure roller are slidably mounted in the second frame through the bearing seats of the third pressure rollers rotatably assembled therewith. The second frame is provided with a third telescopic drive mechanism connected to the bearing seats of the third pressure rollers at both ends. The third telescopic drive mechanism is used to drive the bearing seats of the third pressure rollers to move the third pressure rollers closer to or further away from the tension rollers III.
[0012] Furthermore, the aforementioned steel strip tension adjustment assembly includes an outlet lower pinch roller and a second lifting device. The outlet lower pinch roller extends in the left-right direction, and both ends of the outlet lower pinch roller are slidably mounted in the second frame via third bearing seats rotatably assembled therewith. The second lifting device is connected to the third bearing seats at both ends and is used to drive the third bearing seats to move the outlet lower pinch roller up and down to approach or move away from the tension roller IV. A fifth rotary drive mechanism is connected to any end of the outlet lower pinch roller.
[0013] Furthermore, the second frame is provided with a rolling mill roll group for threading steel strip in the area between tension roll I and tension roll IV.
[0014] Furthermore, the aforementioned rolling mill roll assembly includes upper and lower rolling mill rolls spaced vertically and staggered front and back. Both the upper and lower rolling mill rolls extend in the left-right direction. The two ends of the upper rolling mill rolls are rotatably assembled with the second frame. The two ends of the lower rolling mill rolls are slidably mounted in the second frame via a fourth bearing seat rotatably assembled with them. The frame is provided with a third lifting device connected to the fourth bearing seat. The third lifting device is used to drive the fourth bearing seat to move the lower rolling mill rolls up and down.
[0015] Furthermore, centering side guide devices are respectively provided between the aforementioned inlet pinch roll group and the tension adjustment device, and between the aforementioned tension adjustment device and the rolling shear, and the aforementioned centering side guide devices are used to center and guide the steel strip passing through them.
[0016] Furthermore, the aforementioned winding machine is a Carrousel winding machine, which has at least two sets of drums.
[0017] Furthermore, guide traction roller sets are respectively provided between the exit side of the last stand of the aforementioned cold rolling mill and the entrance pinch roll set, as well as between the aforementioned shearing machine and coiler.
[0018] The beneficial effects of this utility model are: the structure is reasonably designed, and the tension adjustment device realizes two-stage control of the exit tension of the last stand and the winding tension, which ensures high-speed and stable rolling of ultra-thin high-grade electrical steel, achieves the goal of zero unqualified length of finished product thickness difference, and significantly improves the yield. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the outlet tension control system of the ultra-thin high-grade electrical steel cold rolling mill of this utility model;
[0020] Figure 2 This is a top view of the structure of the tension roller and its respective rotation drive mechanism in the outlet tension control system of the ultra-thin high-grade electrical steel cold rolling mill of this utility model.
[0021] The attached diagram lists the components represented by each number as follows:
[0022] 1. Cold continuous rolling mill end stand; 2. Inlet pinch roll assembly; 3. Tension adjustment device; 5. Roll shear; 6. Coiler; 7. Strip tension adjustment assembly; 8. Rolling line roll assembly; 9. Centering side guide device; 21. Inlet upper pinch roll; 22. Inlet lower pinch roll; 23. First lifting device; 31. Tension roll I; 32. Tension roll II; 33. Tension roll III; 34. Tension roll IV; 35. First rotary drive mechanism; 36. Second rotary drive mechanism; 37. Third rotary drive mechanism; 38. Fourth rotary drive mechanism; 71. Outlet lower pinch roll; 72. Second lifting device; 73. Fifth rotary drive mechanism; 81. Upper rolling mill roll; 82. Lower rolling mill roll; 83. Third lifting device; 311. First pressure roller; 312. First telescopic drive mechanism; 321. Second pressure roller; 322. Second telescopic drive mechanism; 331. Third pressure roller; 332. Third telescopic drive mechanism; 351. First motor; 352. First reducer; 361. Second motor; 362. Second reducer; 371. Third motor; 372. Third reducer; 381. Fourth motor; 382. Fourth reducer; 731. Fifth motor; 732. Fifth reducer. Detailed Implementation
[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0024] Example
[0025] like Figure 1 and 2 As shown, the outlet tension control system of the ultra-thin high-grade electrical steel cold rolling mill in this embodiment includes an inlet pinch roll group 2, a four-roll vertical tension roll device, a strip shearing machine 5, and a coiler 6 arranged sequentially from front to back on the outlet side of the last stand 1 of the cold rolling mill. The four-roll vertical tension roll device has four tension rolls that extend horizontally and are distributed vertically and horizontally. A strip tension adjustment component 7 is provided below the tension roll corresponding to the lower rear side of the four-roll vertical tension roll device. The inlet pinch roll group 2 is used to clamp the strip passing through it. The four-roll vertical tension roll device is used to adjust the tension of the strip passing around the four tension rolls and transport it to the rear. The strip shearing machine 5 is used to shear the strip passing through it. The coiler 6 is used to wind the strip into a coil.
[0026] During normal operation, the steel strip exits from the exit side of the last stand 1 of the cold continuous rolling mill, passes through the inlet pinch roll group 2, enters the tension adjustment device 3, then passes through the rolling shear 5, and then enters the coiler 6.
[0027] During normal rolling and slitting: When the strip steel that has been continuously rolled needs to be slitting and shearing, the tension of the steel strip led out from the rear is adjusted by the tension adjustment device 3 to amplify the initial tension setting and keep the tension at the exit of the last stand constant during slitting and shearing; after being sheared by the strip shearing machine 5, the strip head is coiled and tensioned on the coiler 6, and then the tension adjustment device 3 cancels the tension adjustment operation, the steel strip is conveyed normally, and normal rolling begins, that is, the exit side of the last stand 1 of the cold continuous rolling mill has a large tension and the coiler 6 has a small tension mode.
[0028] When re-threading the strip after it breaks during rolling:
[0029] After the steel strip head enters the inlet pinch roll group 2, the inlet pinch roll group 2 clamps the steel strip and conveys it backward. When the strip head tension adjustment device 3 is led out from the rear, the strip head passes through the rolling mill shearing machine 5 and is wound up on the coiler 6. The tension adjustment device 3 normally pulls the steel strip for conveying, and then normal rolling begins.
[0030] In the entire system, the tension of the exit steel strip is effectively adjusted by the tension adjustment device 3 before slitting, so as to ensure that the steel strip maintains a stable tension during the slitting process, and will not cause tension fluctuations during slitting, thus avoiding large deviations in strip thickness and serious reduction in yield.
[0031] In a preferred embodiment, the aforementioned inlet pinch roller assembly 2 includes a first frame, an upper inlet pinch roller 21, a lower inlet pinch roller 22, and a first lifting device 23. The upper inlet pinch roller 21 and the lower inlet pinch roller 22 extend in the left-right direction and are distributed vertically at intervals. The two ends of the upper inlet pinch roller 21 are mounted in the first frame via first upper bearing seats that are rotatably assembled thereto. The two ends of the lower inlet pinch roller 22 are slidably mounted in the first frame via first lower bearing seats that are rotatably assembled thereto. The first lifting device 23 is connected to the two lower bearing seats and is used to drive the two lower bearing seats to move the lower inlet pinch roller 22 up and down to be close to or away from the upper inlet pinch roller 21. The steel strip passes between the upper inlet pinch roller 21 and the lower inlet pinch roller 22.
[0032] In the above implementation scheme, the first lifting device 23 can drive the lower inlet pinch roll 22 to move upward and approach the upper inlet pinch roll 21, which plays a better clamping and conveying role when threading the strip after the strip breaks during rolling, ensuring good backward conveying of the steel strip.
[0033] In this embodiment, a combination of a motor and a reducer is provided at one end of the inlet clamping roller 21 to drive its rotation.
[0034] In this embodiment, the first lifting device 23 adopts a hydraulic cylinder of the appropriate model, and a first bracket is connected between the first lower bearing seats at both ends of the inlet lower clamping roller 22. The first lifting device 23 is connected to the first bracket.
[0035] In this embodiment, the tension adjusting device 3 is a four-roll vertical tension roller device. The four-roll vertical tension roller device includes a second frame and tension rollers rotatably assembled in the second frame. The four tension rollers are tension roller I 31, tension roller II 32, tension roller III 33 and tension roller IV 34. Tension roller I 31 is located below tension roller II 32, tension roller III 33 is located above tension roller IV 34, and tension roller III 33 and tension roller IV 34 are located behind tension roller I 31 and tension roller II 32. The second frame is provided with a first rotary drive mechanism 35, a second rotary drive mechanism 36, a third rotary drive mechanism 37 and a fourth rotary drive mechanism 38 on either the left or right side, which correspond one-to-one with and are connected to the ends of tension roller I 31, tension roller II 32, tension roller III 33 and tension roller IV 34 respectively. After passing through the inlet pinch roll group 2, the steel strip enters the second stand, sequentially passing over tension rolls I 31, II 32, III 33, and IV 34, and exits from behind tension roll IV 34. The first rotary drive mechanism 35, the second rotary drive mechanism 36, the third rotary drive mechanism 37, and the fourth rotary drive mechanism 38 respectively drive tension rolls I 31, II 32, III 33, and IV 34 to rotate, effectively conveying the steel strip backward. A steel strip tension adjustment assembly 7 is located below tension roll IV 34. During normal operation, the steel strip sequentially passes over tension rolls I 31, II 32, III 33, and IV 34, and then exits from behind tension roll IV 34. During rolling and slitting: when the continuously rolled strip needs to be slitting and sheared, the tension of the steel strip leading out from tension roll IV 34 is adjusted by the steel strip tension adjustment assembly 7, amplifying the initial tension setting and maintaining a constant tension at the exit of the last stand during slitting and shearing.
[0036] In a preferred embodiment, a first pressure roller 311 extending laterally is provided below and / or behind the tension roller I 31. Both ends of the first pressure roller 311 are slidably mounted in the second frame via first pressure roller bearing seats rotatably fitted thereto. The second frame is provided with a first telescopic drive mechanism 312 connected to the first pressure roller bearing seats at both ends. The first telescopic drive mechanism 312 is used to drive the first pressure roller bearing seats to move the first pressure roller 311 closer to or further away from the tension roller I 31. A second pressure roller 321 extending laterally is provided above the tension roller II 32. Both ends of the second pressure roller 321 are slidably mounted in the second frame via second pressure roller bearing seats rotatably fitted thereto. The second frame is provided with a second telescopic drive mechanism 322 connected to the second pressure roller bearing seats at both ends. The second telescopic drive mechanism 322 is used to drive the second pressure roller bearing seats to move the second pressure roller 321 closer to or away from the tension roller II 32. Above the tension roller III 33, there is a third pressure roller 331 extending to the left and right. The two ends of the third pressure roller 331 are slidably mounted in the second frame through the third pressure roller bearing seats rotatably assembled with it. The second frame is provided with a third telescopic drive mechanism 332 connected to the third pressure roller bearing seats at both ends. The third telescopic drive mechanism 332 is used to drive the third pressure roller bearing seats to move the third pressure roller 331 closer to or away from the tension roller III 33.
[0037] In the above implementation scheme, a first arc-shaped steel strip guide plate (represented by a in the figure) is provided on the rear side of tension roller I 31, a second arc-shaped steel strip guide plate (represented by b in the figure) is provided on the front side of tension roller II 32, a third steel strip guide plate (represented by c in the figure) is provided between tension roller II 32 and tension roller III 33, a fourth arc-shaped steel strip guide plate (represented by d in the figure) is provided on the rear side of tension roller III 33, and a fifth arc-shaped steel strip guide plate (represented by e in the figure) is provided on the front side of tension roller IV 34. After the strip breaks during rolling, the steel strip is fed into the second stand via the inlet pinch roll group 2. It first passes under tension roll I 31, then is guided along the first strip guide plate (traveling between the first strip guide plate and tension roll I 31) to the lower front side of tension roll II 32. Next, it is guided along the second strip guide plate (traveling between the second strip guide plate and tension roll II 32) to the upper part of tension roll II 32, and then conveyed along the upper surface of the third strip guide plate to the upper part of tension roll III 33. The strip then enters the space between the fourth steel strip guide plate and tension roller III 33, and travels along the fourth steel strip guide plate. It then enters the space between the fifth steel strip guide plate and tension roller IV 34, and travels along the fifth steel strip guide plate. Finally, it exits behind tension roller IV 34. Throughout this process, the first telescopic drive mechanism 312 drives the first pressure roller 311 closer to tension roller I 31, allowing the steel strip head to smoothly enter the space between the first steel strip guide plate and tension roller I 31. The second telescopic drive mechanism 322 drives the second pressure roller... 321 moves downwards closer to tension roller II 32, pressing down the steel strip head passing below the second pressure roller 321 and guiding the steel strip head to be conveyed backwards. The third telescopic drive mechanism 332 drives the third pressure roller 331 downwards, pressing down the steel strip head passing below the third pressure roller 331 and guiding the steel strip head into the space between the fourth steel strip guide plate and tension roller III 33. The whole process ensures that the steel strip head passes smoothly through the four-roll vertical tension roller device and is conveyed to the rolling mill shear 5 in the rear.
[0038] In this embodiment, the first telescopic drive mechanism 312, the second telescopic drive mechanism 322, and the third telescopic drive mechanism 332 all use hydraulic cylinders of the appropriate model. The telescopic ends of the hydraulic cylinders are connected to the bearing seats at both ends of the corresponding pressure rollers through brackets.
[0039] In a preferred embodiment, the steel strip tension adjusting assembly 7 includes an outlet lower clamping roller 71 and a second lifting device 72. The outlet lower clamping roller 71 extends in the left-right direction. Both ends of the outlet lower clamping roller 71 are slidably mounted in the second frame via third bearing seats rotatably assembled therewith. The second lifting device 72 is connected to the third bearing seats at both ends and is used to drive the third bearing seats to move the outlet lower clamping roller 71 up and down to be close to or away from the tension roller IV 34. A fifth rotary drive mechanism 73 is connected to any end of the outlet lower clamping roller 71.
[0040] In the above implementation scheme, the second lifting device 72 drives the third bearing seats at both ends of the lower outlet pinch roller 71 to move the lower outlet pinch roller 71 upward and close to the tension roller IV 34 above, so as to clamp the steel strip passing between the tension roller IV 34 and the lower outlet pinch roller 71, thereby providing tension when the steel strip is drawn out, ensuring effective and high-quality shearing in the future.
[0041] In this embodiment, the second lifting device 72 uses a hydraulic cylinder of a suitable model, and a fixed frame is connected between the third bearing seats at both ends of the lower clamping roller 71 at the outlet. The second lifting device 72 is connected to the fixed frame.
[0042] In this embodiment, the first rotary drive mechanism 35 includes a first motor 351 and a first reducer 352. The first motor 351 is connected to the input shaft of the first reducer 352 via a shaft, and the output shaft of the first reducer 352 is connected to the corresponding end of the tension roller I 31. The second rotary drive mechanism 36 includes a second motor 361 and a second reducer 362. The second motor 361 is connected to the input shaft of the second reducer 362 via a shaft, and the output shaft of the second reducer 362 is connected to the corresponding end of the tension roller II 32. The third rotary drive mechanism 37 includes a third motor 371 and a third reducer 372. The third motor 371 is connected to the input shaft of the tension roller II 32 via a shaft. The input shaft of the third reducer 372 is connected, and the output shaft of the third reducer 372 is connected to the corresponding end of the tension roller III 33; the fourth rotary drive mechanism 38 includes a fourth motor 381 and a fourth reducer 382, wherein the fourth motor 381 is connected to the input shaft of the fourth reducer 382 via a shaft, and the output shaft of the fourth reducer 382 is connected to the corresponding end of the tension roller IV 34; the fifth rotary drive mechanism 73 includes a fifth motor 731 and a fifth reducer 732, wherein the shaft of the fifth motor 731 is connected to the input shaft of the fifth reducer 732, and the output shaft of the fifth reducer 732 is connected to the corresponding end of the outlet lower pinch roller 71 via a universal joint.
[0043] In a preferred embodiment, the second frame is provided with a rolling mill roll group 8 for threading steel strip in the area between the tension roller I 31 and the tension roller IV 34.
[0044] In the above implementation scheme, the setting of the rolling mill group 8 can realize the normal rolling of low-grade electrical steel in conventional grades without the tension control method of the four-roll vertical tension roll. Specifically, the steel strip entering the second support passes directly through the rolling mill group 8, and then is led out through the rolling shear 5 and coiled at the coiler 6.
[0045] In this embodiment, the rolling shear 5 adopts a conventional flying shear model that is compatible with the industry. Generally, a front pinch roller (M in the figure) is provided at the front entrance of the flying shear. The steel strip passes between the two pinch rollers distributed above and below the front pinch roller before entering the flying shear.
[0046] In a preferred embodiment, the rolling mill roll group 8 includes upper rolling mill rolls 81 and lower rolling mill rolls 82 that are spaced apart vertically and staggered front to back. Both the upper rolling mill rolls 81 and the lower rolling mill rolls 82 extend in the left-right direction. The two ends of the upper rolling mill rolls 81 are rotatably assembled with the second frame. The two ends of the lower rolling mill rolls 82 are slidably mounted in the second frame through fourth bearing seats that are rotatably assembled with them. The frame is provided with a third lifting device 83 connected to the fourth bearing seats. The third lifting device 83 is used to drive the fourth bearing seats to move the lower rolling mill rolls 82 up and down.
[0047] In the above implementation scheme, the upper rolling roll 81 and the lower rolling roll 82 are arranged alternately in front and behind and in the top and bottom. The vertical distance between the upper rolling roll 81 and the lower rolling roll 82 can be adjusted by the third lifting device 83, so that the steel strip can pass smoothly between the two and be drawn out.
[0048] In this embodiment, the third lifting device 83 uses a hydraulic cylinder of a suitable model, and a frame is connected between the fourth bearing seats. The third lifting device 83 is connected to the frame.
[0049] In this embodiment, centering side guide devices 9 are respectively provided between the aforementioned inlet pinch roller group 2 and the tension adjusting device 3, and between the aforementioned tension adjusting device 3 and the rolling mill shearing machine 5. The centering side guide devices 9 are used to center and guide the steel strip passing through them. The centering correction during the entry and exit of the steel strip can be achieved by the two centering side guide devices 9 arranged in front and behind. The centering side guide devices 9 are conventional equipment in the existing steel strip processing process in the industry, and will not be described in detail here.
[0050] In this embodiment, the winding machine 6 is a Caroselling winding machine of a suitable model (which is a prior art device and will not be described in detail here). The Caroselling winding machine has at least two sets of drums. Each set of drums can wind the slit steel strip.
[0051] In this embodiment, guide traction roller groups are respectively provided between the exit side of the last stand 1 of the cold continuous rolling mill and the entrance pinch roll group 2, and between the shearing machine 5 and the coiler 6. The guide traction roller groups ensure that the steel strip is smoothly guided into the entrance pinch roll group 2 and the coiler 6. The guide traction roller groups can be multiple traction rollers distributed alternately in front and behind and up and down, or a single traction roller, which the steel strip can pass around.
[0052] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0055] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A tension control system for the outlet of a cold rolling mill for ultra-thin high-grade electrical steel, characterized in that: The equipment includes an inlet pinch roll group (2), a tension adjustment device (3), a strip shearing machine (5), and a coiler (6) arranged sequentially from front to back on the exit side of the last stand (1) of the cold rolling mill. The tension adjustment device (3) is used to adjust the tension of the steel strip passing through it and to convey it backward. The strip shearing machine (5) is used to shear the steel strip passing through it. The coiler (6) is used to wind the steel strip into a coil. The tension adjusting device (3) is a four-roll vertical tension roller device, which includes a second frame and tension rollers rotatably mounted in the second frame. The four tension rollers are tension roller I (31), tension roller II (32), tension roller III (33), and tension roller IV (34). Tension roller I (31) is located below tension roller II (32), tension roller III (33) is located above tension roller IV (34), and tension roller III (33) and tension roller IV (34) are... Located behind the tension rollers I (31) and II (32), the second frame is provided with a first rotary drive mechanism (35), a second rotary drive mechanism (36), a third rotary drive mechanism (37) and a fourth rotary drive mechanism (38) respectively corresponding to and connected to the ends of the tension rollers I (31), II (32), III (33) and IV (34). A steel strip tension adjustment assembly (7) is provided below the tension roller IV (34).
2. The outlet tension control system for an ultra-thin high-grade electrical steel cold rolling mill according to claim 1, characterized in that: The inlet pinch roller assembly (2) includes a first frame, an upper inlet pinch roller (21), a lower inlet pinch roller (22), and a first lifting device (23). The upper inlet pinch roller (21) and the lower inlet pinch roller (22) extend in the left and right directions respectively and are distributed vertically at intervals. The two ends of the upper inlet pinch roller (21) are mounted in the first frame through a first upper bearing seat that is rotatably assembled with it. The two ends of the lower inlet pinch roller (22) are slidably mounted in the first frame through a first lower bearing seat that is rotatably assembled with it. The first lifting device (23) is connected to two first lower bearing seats and is used to drive the two first lower bearing seats to move the lower inlet pinch roller (22) up and down to be close to or away from the upper inlet pinch roller (21). The steel strip passes between the upper inlet pinch roller (21) and the lower inlet pinch roller (22).
3. The outlet tension control system for an ultra-thin high-grade electrical steel cold rolling mill according to claim 1, characterized in that: Below and / or behind the tension roller I (31), there is a first pressure roller (311) extending left and right. The two ends of the first pressure roller (311) are slidably mounted in the second frame through first pressure roller bearing seats rotatably assembled with it. The second frame is provided with a first telescopic drive mechanism (312) connected to the first pressure roller bearing seats at both ends. The first telescopic drive mechanism (312) is used to drive the first pressure roller bearing seats to move the first pressure roller (311) closer to or away from the tension roller I (31). Above the tension roller II (32), there is a second pressure roller (321) extending left and right. The two ends of the second pressure roller (321) are slidably mounted in the second frame through second pressure roller bearing seats rotatably assembled with it. The second frame is provided with a first telescopic drive mechanism (312) connected to the first pressure roller bearing seats at both ends. The second telescopic drive mechanism (322) is connected to the second pressure roller bearing seats at both ends. The second telescopic drive mechanism (322) is used to drive the second pressure roller bearing seats to move the second pressure roller (321) closer to or away from the tension roller II (32). A third pressure roller (331) extending left and right is provided above the tension roller III (33). The two ends of the third pressure roller (331) are slidably mounted in the second frame through the third pressure roller bearing seats rotatably assembled with it. The second frame is provided with a third telescopic drive mechanism (332) connected to the third pressure roller bearing seats at both ends. The third telescopic drive mechanism (332) is used to drive the third pressure roller bearing seats to move the third pressure roller (331) closer to or away from the tension roller III (33).
4. The outlet tension control system for an ultra-thin high-grade electrical steel cold rolling mill according to claim 1, characterized in that: The steel strip tension adjustment assembly (7) includes an outlet lower pinch roller (71) and a second lifting device (72). The outlet lower pinch roller (71) extends in the left-right direction. Both ends of the outlet lower pinch roller (71) are slidably mounted in the second frame through a third bearing seat rotatably assembled with it. The second lifting device (72) is connected to the third bearing seats at both ends and is used to drive the third bearing seats to move the outlet lower pinch roller (71) up and down to be close to or away from the tension roller IV (34). A fifth rotary drive mechanism (73) is connected to any end of the outlet lower pinch roller (71).
5. The outlet tension control system for an ultra-thin high-grade electrical steel cold rolling mill according to claim 1, characterized in that: The second frame is provided with a rolling mill group (8) for threading steel strip in the area between tension roller I (31) and tension roller IV (34).
6. The outlet tension control system for an ultra-thin high-grade electrical steel cold rolling mill according to claim 5, characterized in that: The rolling mill roll group (8) includes an upper rolling mill roll (81) and a lower rolling mill roll (82) that are spaced apart vertically and staggered front and back. Both the upper rolling mill roll (81) and the lower rolling mill roll (82) extend in the left and right direction. The two ends of the upper rolling mill roll (81) are rotatably assembled with the second frame. The two ends of the lower rolling mill roll (82) are slidably mounted in the second frame through a fourth bearing seat rotatably assembled with it. The frame is provided with a third lifting device (83) connected to the fourth bearing seat. The third lifting device (83) is used to drive the fourth bearing seat to move the lower rolling mill roll (82) up and down.
7. The outlet tension control system for an ultra-thin high-grade electrical steel cold rolling mill according to any one of claims 1 to 6, characterized in that: The inlet pinch roll group (2) and the tension adjustment device (3) are respectively provided with centering side guide devices (9) between the tension adjustment device (3) and the rolling shear (5). The centering side guide devices (9) are used to center and guide the steel strip passing through them.
8. The outlet tension control system for an ultra-thin high-grade electrical steel cold rolling mill according to any one of claims 1 to 6, characterized in that: The winding machine (6) is a Carrousel winding machine, which has at least two sets of drums.
9. The outlet tension control system for an ultra-thin high-grade electrical steel cold rolling mill according to any one of claims 1 to 6, characterized in that: Guide traction roller groups are respectively provided between the exit side of the end stand (1) of the cold continuous rolling mill and the inlet pinch roll group (2), as well as between the rolling shear (5) and the coiler (6).