Rolling mill arrangement based on automatic correction function

Abstract

This invention discloses a rolling mill device based on automatic deviation correction, belonging to the technical field of rolling mill equipment. The rolling mill device includes a machine body, on which a sensing mechanism and a rolling mechanism are provided. A pressing mechanism and an adjusting mechanism are also symmetrically provided on the machine body. The rolling mechanism is located below the pressing mechanism. The pressing mechanism and the adjusting mechanism are connected by pipes. The two ends of the sensing mechanism respectively abut against two sets of adjusting mechanisms. A pressure equalization mechanism is provided between the pressing mechanisms. The sensing mechanism includes a sensing deviation correction roller. The adjusting mechanism includes a drive piston, a transition pipe, a slide valve rod, and a slide valve sleeve. One end of the drive piston is inserted into the transition pipe, and the drive piston and the transition pipe are slidably connected. One end of the slide valve rod is inserted into the transition pipe. This invention achieves precise control of the opening of the oil drain port of the hydraulic circuit of the pressing mechanism by setting a sensing deviation correction roller on the inlet side of the rolling mill. The mechanical displacement generated when the strip deviates pulls the drive piston, which in turn drives the slide valve rod through the hydraulic oil in the transition pipe, thus achieving adaptive deviation correction.

Description

Technical Field

[0001] This invention relates to the field of rolling mill equipment technology, specifically to rolling mill equipment based on automatic deviation correction function. Background Technology

[0002] Rolling mills are core equipment in the metallurgical industry used to process metal ingots or billets into plates of specific shapes and sizes through pressure between rolls. Based on rolling temperature, rolling mills are mainly divided into two categories: hot rolling mills and cold rolling mills. Cold rolling mills, which roll strip at room temperature, can achieve higher dimensional accuracy and better surface quality, and are widely used in the production of high-end products such as automotive panels, appliance panels, silicon steel sheets, and precision strips. With the rapid development of aerospace, new energy vehicles, and electronic information industries, the demand for high-quality aluminum alloy plates, high-quality magnesium, copper, titanium, and other high-end metal materials is increasing. These materials require extremely high sheet shape accuracy, thickness consistency, and surface quality, and strip misalignment directly restricts the yield and production efficiency of these high-quality products. The working principle of a cold rolling mill is to apply enormous rolling pressure to the strip through the upper and lower work rolls, causing the strip to undergo plastic deformation in the roll gap, thereby achieving thickness reduction and sheet shape control.

[0003] Strip misalignment has long been a major technical challenge in cold rolling production. Misalignment refers to the deviation of the strip's centerline from the mill's centerline during operation, resulting in uneven stress distribution across the roll width. This problem is particularly pronounced at the strip's head entering the mill. Due to upstream processes potentially causing camber or uneven residual stress distribution, the strip head often exhibits a certain degree of misalignment before entering the rolls. When this misalignment exceeds the allowable range, it triggers a series of quality issues. Misalignment not only leads to shape defects such as camber, edge waviness, and uneven thickness in the finished strip, but also accelerates localized wear on the rolls. In severe cases, it can even cause production accidents such as strip edge scraping against the mill stand or strip breakage, resulting in equipment damage and production downtime. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of strip misalignment before rolling in the prior art, and to propose a rolling mill equipment based on automatic deviation correction function.

[0005] To address the above problems, the present invention provides the following technical solution: The rolling mill equipment based on automatic correction function includes a machine body, a sensing mechanism and a rolling mechanism on the machine body, a pressing mechanism and an adjusting mechanism symmetrically arranged on the machine body, a rolling mechanism below the pressing mechanism, the pressing mechanism and the adjusting mechanism are connected by pipes, the two ends of the sensing mechanism are respectively connected to two sets of adjusting mechanisms, and a pressure equalization mechanism is provided between the pressing mechanisms. The sensing mechanism includes a sensing correction roller; The regulating mechanism includes a drive piston, a transition tube, a spool valve rod, and a spool valve sleeve. One end of the drive piston is inserted into the transition tube, and the drive piston and the transition tube are slidably connected. One end of the spool valve rod is inserted into the transition tube, and the other end of the spool valve rod is inserted into the spool valve sleeve. The spool valve rod is slidably connected to the transition tube and the spool valve sleeve respectively. Hydraulic oil is provided in the transition tube. The end of the induction correction roller shaft is connected to one end of the drive piston, and the slide valve sleeve is connected to the pressing mechanism pipe.

[0006] The machine body provides support for other structures, the pressing mechanism provides rolling pressure to the rolling mechanism, the adjusting mechanism adjusts the hydraulic pressure of the pressing mechanism, the sensing mechanism detects whether the strip deviates before entering the rolling mechanism. If the sensing mechanism detects that the strip deviates to the right, the adjusting mechanism adjusts the pressing mechanism on the left to reduce its hydraulic pressure, and then the rolling mechanism moves the strip to the left to correct the deviation. The pressure equalization mechanism restores the pressure of the two pressing mechanisms to balance after the deviation correction is completed. The induction correction roller is set at the feed end of the machine body, arranged across the width of the strip, and rolls in contact with the surface of the strip. The strip passes through the induction correction roller before entering the rolling mechanism. When the strip deviates, the edge of the strip exerts a continuous lateral squeezing force on the roller surface. The axial friction component generated by the deviated strip on the roller surface pushes the induction correction roller 31 to move along its axial direction. The shaft end of the induction correction roller pulls the drive piston, and the hydraulic oil in the transition tube is squeezed, which pulls the slide valve rod to slide in the transition tube and the slide valve sleeve, thereby realizing the throttling control of the hydraulic circuit of the pressing mechanism and adjusting the hydraulic pressure of the pressing mechanism.

[0007] Furthermore, the spool sleeve is provided with an oil inlet, an oil outlet and an oil drain, and the spool sleeve is provided with an oil passage inside; A limit spring is fitted at one end of the valve stem; One end of the limit spring is connected to the end of the oil passage, and the spool valve rod is slidably connected to the oil passage. The cross-sectional area of ​​one end of the spool valve rod is larger than the cross-sectional area of ​​the drain port.

[0008] The oil inlet is used to introduce high-pressure oil from the hydraulic pump station, the oil outlet is used to deliver the high-pressure oil to the pressing mechanism, and the oil drain is used to drain excess oil back to the oil tank. The cross-sectional area of ​​one end of the spool valve rod is larger than that of the drain port. When the spool valve rod is in its initial position under the action of the limit spring, the end of the spool valve rod blocks the drain port, cutting off the drain channel. The inlet and outlet are connected, and the high-pressure oil is normally transported to the pressing mechanism through the oil channel. When the strip deviates and pushes the induction correction roller, the induction correction roller pulls the drive piston. The hydraulic oil in the transition pipe is squeezed, pulling the spool valve rod to slide along the spool valve sleeve against the spring force of the limit spring. The gap between the end of the spool valve rod and the drain port increases, and the inlet and drain port are partially connected. Some of the high-pressure oil is discharged back to the oil tank through the drain port, thereby reducing the oil pressure delivered to the pressing mechanism. The greater the deviation, the greater the displacement of the induction correction roller, which makes the range of movement of the spool valve rod larger, the opening of the drain port larger, the pressure relief greater, and the pressure reduction of the pressing mechanism higher, thus achieving adaptive adjustment.

[0009] Furthermore, the pressing mechanism includes a hydraulic cylinder and an oil inlet pipe. One end of the hydraulic cylinder rod is connected to the rolling mechanism, and one end of the hydraulic cylinder body is connected to both the oil inlet pipe and the pressure equalization mechanism pipe. The oil inlet pipe is also connected to the oil outlet pipe.

[0010] One end of the hydraulic cylinder rod is connected to the rolling mechanism to apply downward rolling pressure to the rolling mechanism. The high-pressure oil supplied by the hydraulic pump station enters the spool sleeve through the oil inlet, flows out from the oil outlet, and enters the hydraulic cylinder through the oil inlet pipe, driving the hydraulic cylinder rod to move downward.

[0011] Furthermore, the rolling mechanism includes an adjusting support roll, a work roll, and a fixed support roll. There are two sets of work rolls, which are located between the adjusting support roll and the fixed support roll. The work roll and the fixed support roll are respectively placed on the machine body. The adjusting support roll is slidably connected to the machine body, and a hydraulic cylinder is provided above the adjusting support roll.

[0012] The adjusting support roller is slidably connected to the machine body, allowing it to slide vertically along the machine body. A hydraulic cylinder is located above the adjusting support roller, with the lower end of the cylinder rod connected to it. The hydraulic cylinder drives the adjusting support roller downwards, transmitting pressure to the work roll. The work roll rolls the strip, while the fixed support roller supports the work roll from below.

[0013] Furthermore, the sensing mechanism also includes a fixed support and a floating support. Two sets of fixed supports are symmetrically arranged at the feed end of the machine body. Each set of fixed supports is hinged to the floating support. The floating support is connected to the sensing correction roller. The two shaft ends of the sensing correction roller pass through the two sets of floating supports respectively.

[0014] The fixed brackets are fixed to the machine body. Each set of fixed brackets is hinged to the floating brackets. The floating brackets can swing around the hinge points within a certain angle range. The floating brackets are connected to the induction correction rollers. The two shaft ends of the induction correction rollers pass through the two sets of floating brackets respectively. The induction correction rollers swing synchronously with the floating brackets. When the strip enters the rolling mill for rolling, the strip first passes through the induction correction rollers. Since different strips have different thicknesses, the induction correction rollers and floating brackets can rotate through the hinge points to adapt to strips of different thicknesses. When the strip deviates, the edge of the strip pushes the induction correction rollers, and the shaft end of the induction correction rollers generates axial displacement, thereby pulling the drive piston.

[0015] Furthermore, a limiting plate is provided at one end of the fixed bracket, and the floating bracket is located on the limiting plate.

[0016] The limit plate is used to limit the swing range of the floating support and prevent excessive displacement of the induction correction roller from causing equipment damage. When no strip passes by, the floating support is placed on the limit plate. When strip passes by, strips of different thicknesses cause the floating support to rotate to different heights.

[0017] Furthermore, the pressure equalization mechanism includes a pressure equalization pipe, a valve, and a proximity sensor, with the valve located in the middle of the pressure equalization pipe; The inductive correction roller has an induction plate in the middle, and a placement rod is provided between the two sets of fixed brackets; The proximity sensor is located in the middle of the placement rod, and the two ends of the pressure equalization pipe are connected to the pipes of two sets of hydraulic cylinders respectively.

[0018] The valve is used to control the opening and closing of the pressure equalization pipeline. When the strip correction is completed, the induction correction roller returns to the center position under the push of the strip. The induction plate in the middle of the induction correction roller moves into the sensing range of the proximity sensor. The proximity sensor sends a detection signal. After receiving the signal from the proximity sensor, the valve opens. The pressure equalization pipeline connects the oil inlet chambers of the two sets of hydraulic cylinders. The hydraulic oil on the high-pressure side automatically flows to the low-pressure side until the pressure of the two sets of hydraulic cylinders is equal. After the pressure is balanced, the valve closes and the rolling mill resumes normal pressure equalization rolling state. This process ensures that the rolling pressure on both sides is restored to balance after the correction is completed, and avoids affecting the rolling quality of the subsequent strip due to the continuous low pressure on one side.

[0019] Furthermore, the sensing mechanism also includes two sets of reset components. Two sets of limiting rings are symmetrically provided on the outer rings of the two shaft ends of the sensing correction roller. The two sets of limiting rings abut against the two sets of reset components respectively. The reset assembly includes a reset spring and a collar, with the reset spring located on one side of the collar; One end of the reset spring is connected to the floating bracket, and one side of the collar abuts against the limit ring. The two shaft ends of the induction correction roller pass through the collars and reset springs on both sides respectively.

[0020] A collar is fitted around the outer ring of the shaft end of the inductive correction roller. The inductive correction roller can slide axially relative to the collar. One end of the return spring is connected to the floating bracket, and the other end of the return spring is fixedly connected to the collar. One side of the collar abuts against the limiting ring. When the strip deviates and pushes the inductive correction roller to one side, the inductive correction roller drives the limiting ring on that side to move to the same side. The limiting ring compresses or stretches the return spring, and the return spring generates an elastic return force in the opposite direction of movement. Before the strip enters the working rolls for rolling, if the strip deviation distance is small, this elastic return force helps to correct the strip deviation in advance. If the strip deviation distance is large, the elastic return force cannot completely correct the strip deviation. The pressure of the hydraulic cylinder is then adjusted by the adjustment mechanism to further correct the deviation. After the strip deviation force disappears, the elastic return force of the return spring can also push the limiting ring and the inductive correction roller back to the center position.

[0021] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes an inductive correction roller installed at the mill inlet side. The mechanical displacement generated when the strip deviates pulls a drive piston, which in turn drives a spool valve rod via hydraulic oil in a transition pipe. This achieves precise control of the opening of the drain port in the hydraulic circuit of the pressing mechanism. When the strip deviates significantly, the displacement of the inductive correction roller increases, resulting in a larger stroke of the spool valve rod. This increases the opening area between the drain port and the spool valve rod, increasing the pressure relief and strengthening the correction force. Conversely, when the deviates significantly, the correction force automatically weakens, achieving adaptive correction. 2. This invention provides a reset spring at both ends of the induction correction roller. The reset spring generates an elastic reset force opposite to the direction of movement. Before the strip enters the working rollers for rolling, if the strip offset distance is small, this elastic reset force helps to correct the strip in advance. If the strip offset distance is large, the elastic reset force cannot completely correct the strip. Then, the pressure of the hydraulic cylinder is adjusted by the adjustment mechanism to further correct the strip. The cooperation between the elastic reset force of the reset spring and the adjustment mechanism improves the strip correction efficiency and achieves a better correction effect. 3. The correction action of the present invention is performed before the strip enters the rolling mill, mainly for the correction of the strip head. Since the head may have sickle bend or uneven residual stress distribution in the previous process, the present invention completes the correction and pressure equalization before the head enters the roll. The subsequent strip is continuously rolled under the pressure equalization state, thereby ensuring the uniformity of the strip shape and thickness and the surface quality of the whole coil. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the sensing mechanism of the present invention; Figure 3 for Figure 2A magnified view of part A of the view; Figure 4 This is a schematic diagram of the rolling mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the sensing element and proximity sensor of the present invention; Figure 6 This is a schematic diagram of the structure of the reset component of the present invention; Figure 7 for Figure 6 A magnified view of part B of the view.

[0023] In the diagram: 1. Machine body; 2. Pressing mechanism; 21. Hydraulic cylinder; 22. Oil inlet pipe; 3. Sensing mechanism; 31. Sensing and correcting roller; 32. Fixed bracket; 321. Limiting plate; 33. Floating bracket; 34. Placement rod; 35. Sensing plate; 36. Reset assembly; 361. Reset spring; 362. Collar; 37. Limiting ring; 4. Adjusting mechanism; 41. Drive piston; 42. Transition pipe; 43. Slide valve rod; 44. Slide valve sleeve; 441. Oil inlet; 442. Oil outlet; 443. Oil drain port; 444. Oil passage; 45. Limiting spring; 5. Rolling mechanism; 51. Adjusting support roller; 52. Work roller; 53. Fixed support roller; 6. Pressure equalization mechanism; 61. Pressure equalization pipe; 62. Valve; 63. Proximity sensor. Detailed Implementation

[0024] The embodiments of the present invention will now be further described in conjunction with the accompanying drawings and examples.

[0025] Example: Figures 1-7 As shown, the present invention provides a technical solution for a rolling mill based on an automatic deviation correction function.

[0026] Example 1: As Figures 1-2 As shown, the rolling mill equipment based on automatic correction function includes a machine body 1. The machine body 1 is provided with a sensing mechanism 3 and a rolling mechanism 5. The machine body 1 is also symmetrically provided with a pressing mechanism 2 and an adjusting mechanism 4. The rolling mechanism 5 is provided below the pressing mechanism 2. The pressing mechanism 2 and the adjusting mechanism 4 are connected by pipes. The two ends of the sensing mechanism 3 are respectively connected to two sets of adjusting mechanisms 4. A pressure equalization mechanism 6 is provided between the pressing mechanisms 2. The sensing mechanism 3 includes a sensing correction roller 31; The regulating mechanism 4 includes a drive piston 41, a transition pipe 42, a slide valve rod 43, and a slide valve sleeve 44. One end of the drive piston 41 is inserted into the transition pipe 42, and the drive piston 41 and the transition pipe 42 are slidably connected. One end of the slide valve rod 43 is inserted into the transition pipe 42, and the other end of the slide valve rod 43 is inserted into the slide valve sleeve 44. The slide valve rod 43 is slidably connected to the transition pipe 42 and the slide valve sleeve 44 respectively. Hydraulic oil is provided in the transition pipe 42. The shaft end of the induction correction roller 31 abuts against one end of the drive piston 41, and the slide valve sleeve 44 is connected to the pressing mechanism 2 via a pipe.

[0027] The machine body 1 is used to provide support for other structures. The pressing mechanism 2 is used to provide rolling pressure to the rolling mechanism 5. The adjusting mechanism 4 is used to adjust the hydraulic pressure of the pressing mechanism 2. The sensing mechanism 3 is used to detect whether the strip before entering the rolling mechanism 5 has deviated. If the sensing mechanism 3 detects that the strip deviates to the right, the adjusting mechanism 4 adjusts the pressing mechanism 2 on the left to reduce its hydraulic pressure. Then, the rolling mechanism 5 moves the strip to the left to return the strip to its original position and correct the deviation. The pressure equalization mechanism 6 is used to restore the pressure of the two pressing mechanisms 2 to balance after the deviation correction is completed. The induction correction roller 31 is set at the feed end of the machine body 1, and is arranged across the width of the strip. It rolls in contact with the surface of the strip. The strip passes through the induction correction roller 31 before entering the rolling mechanism 5. When the strip deviates, the edge of the strip exerts a continuous lateral squeezing force on the roller surface. The axial friction component of the deviated strip on the roller surface pushes the induction correction roller 31 to move along its axial direction. The shaft end of the induction correction roller 31 pulls the drive piston 41. The hydraulic oil in the transition pipe 42 is squeezed, which pulls the slide valve rod 43 to slide in the transition pipe 42 and the slide valve sleeve 44, thereby realizing the throttling control of the hydraulic circuit of the pressing mechanism 2 and adjusting the hydraulic pressure of the pressing mechanism 2.

[0028] like Figure 3 As shown, the slide valve sleeve 44 is provided with an oil inlet 441, an oil outlet 442 and an oil drain 443, and the slide valve sleeve 44 is provided with an oil passage 444 inside. A limiting spring 45 is fitted at one end of the slide valve stem 43; The valve stem 43 and the oil passage 444 are slidably connected, and the cross-sectional area of ​​one end of the valve stem 43 is larger than the cross-sectional area of ​​the oil drain port 443.

[0029] High-pressure oil from the hydraulic pump station is introduced through the inlet 441, and the high-pressure oil is delivered to the pressing mechanism 2 through the outlet 442. Excess oil is drained back to the oil tank through the drain port 443. When the spool valve 43 is in its initial position under the action of the limit spring 45, the end of the spool valve 43 blocks the drain port 443, cutting off the drain channel. The inlet 441 and the outlet 442 are connected, and the high-pressure oil is normally delivered to the pressing mechanism 2 through the oil channel 444. When the strip deviates and pushes the induction correction roller 31, the induction correction roller 31 pulls the drive piston 41. The hydraulic oil in the transition pipe 42 is squeezed, pulling the spool valve 43 to overcome the spring force of the limit spring 45 and slide along the spool valve sleeve 44. When the valve stem 43 moves, the gap between the end of the valve stem 43 and the drain port 443 increases, and the inlet port 441 and the drain port 443 are partially connected. Some high-pressure oil is discharged back to the oil tank through the drain port 443, thereby reducing the oil pressure delivered to the pressing mechanism 2. The greater the deviation, the greater the displacement of the induction correction roller 31, the greater the range of movement of the valve stem 43 driven by the driving piston 41, the greater the opening of the drain port 443, the greater the pressure relief, and the greater the pressure reduction of the pressing mechanism 2, thus achieving adaptive adjustment.

[0030] like Figure 4 As shown, the pressing mechanism 2 includes a hydraulic cylinder 21 and an oil inlet pipe 22. One end of the rod of the hydraulic cylinder 21 is connected to the rolling mechanism 5, and one end of the cylinder body of the hydraulic cylinder 21 is connected to the oil inlet pipe 22 and the pressure equalization mechanism 6 respectively. The oil inlet pipe 22 is connected to the oil outlet 442.

[0031] One end of the rod of hydraulic cylinder 21 is connected to the rolling mechanism 5 and is used to apply downward rolling pressure to the rolling mechanism 5. The high-pressure oil provided by the hydraulic pump station enters the slide valve sleeve 44 through the oil inlet 441, flows out from the oil outlet 442 and enters the hydraulic cylinder 21 through the oil inlet pipe 22, driving the rod of hydraulic cylinder 21 to move downward.

[0032] like Figure 4 As shown, the rolling mechanism 5 includes an adjusting support roller 51, a working roller 52 and a fixed support roller 53. The working roller 52 is provided in two sets, and the two sets of working rollers 52 are located between the adjusting support roller 51 and the fixed support roller 53. The working roller 52 and the fixed support roller 53 are respectively placed on the machine body 1. The adjusting support roller 51 is slidably connected to the machine body 1. A hydraulic cylinder 21 is provided above the adjusting support roller 51.

[0033] The adjusting support roller 51 is slidably connected to the machine body 1, and can slide vertically on the machine body 1. A hydraulic cylinder 21 is provided above the adjusting support roller 51, and the lower end of the rod of the hydraulic cylinder 21 is connected to the adjusting support roller 51. The hydraulic cylinder 21 drives the adjusting support roller 51 to move downward, and the adjusting support roller 51 transmits pressure to the work roller 52. The work roller 52 rolls the strip, and the fixed support roller 53 supports the work roller 52 from below.

[0034] like Figure 5As shown, the sensing mechanism 3 also includes a fixed bracket 32 ​​and a floating bracket 33. Two sets of fixed brackets 32 are symmetrically arranged at the feed end of the machine body 1. Each set of fixed brackets 32 is hinged to the floating bracket 33. The floating bracket 33 is connected to the sensing correction roller 31. The two shaft ends of the sensing correction roller 31 pass through the two sets of floating brackets 33 respectively.

[0035] Fixed brackets 32 are fixed on the machine body 1. Each set of fixed brackets 32 is hinged to floating brackets 33. Floating brackets 33 can swing around the hinge point within a certain angle range. Floating brackets 33 are connected to induction correction rollers 31. The two shaft ends of induction correction rollers 31 pass through two sets of floating brackets 33 respectively. Induction correction rollers 31 swing synchronously with floating brackets 33. When the strip enters the rolling mill for rolling, the strip first passes through the induction correction rollers 31. Since different strips have different thicknesses, induction correction rollers 31 and floating brackets 33 can rotate through the hinge point to adapt to strips of different thicknesses. When the strip deviates, the edge of the strip pushes the induction correction rollers 31, and the shaft end of the induction correction rollers 31 generates axial displacement, thereby pulling the drive piston 41.

[0036] like Figure 5 As shown, a limiting plate 321 is provided at one end of the fixed bracket 32, and the floating bracket 33 is located on the limiting plate 321.

[0037] The limiting plate 321 is used to limit the swing range of the floating support 33 and prevent the induction correction roller 31 from being over-displaced and causing damage to the equipment. When no strip passes by, the floating support 33 is placed on the limiting plate 321. When a strip passes by, the different thicknesses of the strip cause the floating support 33 to rotate to different heights.

[0038] like Figures 4-5 As shown, the pressure equalization mechanism 6 includes a pressure equalization pipe 61, a valve 62 and a proximity sensor 63, with the valve 62 located in the middle of the pressure equalization pipe 61; The induction correction roller 31 has an induction plate 35 in the middle, and a placement rod 34 is provided between the two sets of fixed brackets 32; The proximity sensor 63 is located in the middle of the placement rod 34, and the two ends of the pressure equalization pipe 61 are respectively connected to the pipes of the two sets of hydraulic cylinders 21.

[0039] Valve 62 is used to control the opening and closing of the pressure equalization pipeline 61. When the strip correction is completed, the induction correction roller 31 returns to the center position under the push of the strip. The induction plate 35 in the middle of the induction correction roller 31 moves into the sensing range of the proximity sensor 63. The proximity sensor 63 sends a detection signal. After receiving the signal from the proximity sensor 63, the valve 62 opens. The pressure equalization pipeline 61 connects the oil inlet chambers of the two sets of hydraulic cylinders 21. The hydraulic oil on the high-pressure side automatically flows to the low-pressure side until the pressure of the two sets of hydraulic cylinders 21 is equal. After the pressure is balanced, the valve 62 closes and the rolling mill resumes normal pressure equalization rolling state. This process ensures that the rolling pressure on both sides is restored to balance after the correction is completed, and avoids affecting the rolling quality of the strip due to the continuous low pressure on one side.

[0040] Example 2: Figures 6-7 As shown, the sensing mechanism 3 also includes two sets of reset components 36. The outer rings of the two shaft ends of the sensing correction roller 31 are symmetrically provided with two sets of limiting rings 37, and the two sets of limiting rings 37 abut against the two sets of reset components 36 respectively. The reset assembly 36 includes a reset spring 361 and a collar 362, with the reset spring 361 provided on one side of the collar 362; One end of the reset spring 361 is connected to the floating bracket 33, one side of the collar 362 abuts against the limiting ring 37, and the two shaft ends of the induction correction roller 31 pass through the collar 362 and the reset spring 361 on both sides respectively.

[0041] A collar 362 is fitted around the outer ring of the shaft end of the inductive correction roller 31. The inductive correction roller 31 can slide axially relative to the collar 362. One end of the return spring 361 is connected to the floating bracket 33, and the other end of the return spring 361 is fixedly connected to the collar 362. One side of the collar 362 abuts against the limiting ring 37. When the strip deviates and pushes the inductive correction roller 31 to one side, the inductive correction roller 31 drives the limiting ring 37 on that side to move to the same side. The limiting ring 37 compresses or stretches the return spring 361, and the return spring 361 generates a force relative to the shaft end of the roller. The elastic restoring force moving in the opposite direction helps to correct the strip deviation in advance if the strip deviation distance is small before it enters the working rolls 52 for rolling. If the strip deviation distance is large, the elastic restoring force cannot completely correct the strip deviation. The pressure of the hydraulic cylinder 21 is adjusted by the adjusting mechanism 4 to further correct the deviation. After the strip deviation force disappears, the elastic restoring force of the return spring 361 can also push the limit ring 37 and the sensing correction roller 31 back to the center position.

[0042] Working principle of the invention: When the strip deviates to the right, the edge of the strip pushes the induction correction roller 31 to move to the right. The induction correction roller 31 pulls the drive piston 41 on the left, and the hydraulic oil in the transition pipe 42 is squeezed, pulling the left slide valve rod 43 to slide in the slide valve sleeve 44. This overcomes the spring force of the limit spring 45, causing the end of the slide valve rod 43 to separate from the drain port 443. The left oil inlet 441 and the drain port 443 are partially connected, and the high-pressure oil in the left oil inlet pipe 22 is discharged back to the oil tank through the drain port 443, reducing the pressure in the left hydraulic cylinder 21. With the pressure on the left side decreasing, the relative pressure on the right side is greater. The pressure of the left side of the adjusting support roller 51 on the left side of the work roller 52 decreases, and the roll gap between the right side of the upper work roller 52 and the lower work roller 52 slightly increases. The left side of the strip is relaxed, while the right side is squeezed by greater pressure, thus gradually moving towards the side with less rolling force. Under the action of the continuously rolling work roller 52, the strip moves to the left and returns to the center line of the mill. Similarly, when the strip deviates to the left, the left adjustment mechanism 4 activates, the left hydraulic cylinder 21 depressurizes, and the strip returns to the center to the right. After the strip returns to the centerline, the inductive correction roller 31 returns to the centered position, the inductive plate 35 moves to the sensing range of the proximity sensor 63, the control valve 62 opens, and the high-pressure oil on the right side automatically flows to the left side through the pressure equalization pipe 61 until the pressure on both sides is equal. After the pressure is balanced, the two sets of pressing mechanisms 2 return to the pressure equalization state, and the mill continues to operate normally.

[0043] The above description is merely a preferred embodiment of the present invention. Any modifications and / or equivalent substitutions and / or improvements made within the scope of the technical solutions claimed in the claims of this application should be included within the protection scope of the present invention. The protection scope of this application is determined by the technical solutions in the claims and their equivalents, and is not limited by the specific description in the specification.

Claims

1. A rolling mill based on automatic deviation correction function, characterized in that: The rolling mill equipment includes a machine body (1), on which a sensing mechanism (3) and a rolling mechanism (5) are provided. A pressing mechanism (2) and an adjusting mechanism (4) are also symmetrically provided on the machine body (1). The rolling mechanism (5) is provided below the pressing mechanism (2). The pressing mechanism (2) and the adjusting mechanism (4) are connected by a pipe. The two ends of the sensing mechanism (3) are respectively connected to two sets of adjusting mechanisms (4). A pressure equalization mechanism (6) is provided between the pressing mechanisms (2). The sensing mechanism (3) includes a sensing correction roller (31). The regulating mechanism (4) includes a drive piston (41), a transition pipe (42), a slide valve rod (43), and a slide valve sleeve (44). One end of the drive piston (41) is inserted into the transition pipe (42), and the drive piston (41) and the transition pipe (42) are slidably connected. One end of the slide valve rod (43) is inserted into the transition pipe (42), and the other end of the slide valve rod (43) is inserted into the slide valve sleeve (44). The slide valve rod (43) is slidably connected to the transition pipe (42) and the slide valve sleeve (44) respectively. Hydraulic oil is provided inside the transition pipe (42). The shaft end of the induction correction roller (31) is connected to one end of the drive piston (41), and the slide valve sleeve (44) is connected to the pressing mechanism (2) via a pipe.

2. The rolling mill equipment based on automatic deviation correction function according to claim 1, characterized in that: The slide valve sleeve (44) is provided with an oil inlet (441), an oil outlet (442) and an oil drain (443), and the slide valve sleeve (44) is provided with an oil passage (444) inside. A limiting spring (45) is sleeved on one end of the slide valve rod (43); The valve stem (43) and the oil passage (444) are slidably connected, and the cross-sectional area of ​​one end of the valve stem (43) is larger than the cross-sectional area of ​​the drain port (443).

3. The rolling mill equipment based on automatic deviation correction function according to claim 2, characterized in that: The pressing mechanism (2) includes a hydraulic cylinder (21) and an oil inlet pipe (22). One end of the rod of the hydraulic cylinder (21) is connected to the rolling mechanism (5). One end of the cylinder body of the hydraulic cylinder (21) is connected to the oil inlet pipe (22) and the pressure equalization mechanism (6) respectively. The oil inlet pipe (22) is connected to the oil outlet (442).

4. The rolling mill equipment based on automatic deviation correction function according to claim 3, characterized in that: The sensing mechanism (3) further includes a fixed bracket (32) and a floating bracket (33). The feed end of the machine body (1) is symmetrically provided with two sets of fixed brackets (32). Each set of fixed brackets (32) is hinged to the floating bracket (33). The floating bracket (33) is connected to the sensing correction roller (31). The two shaft ends of the sensing correction roller (31) pass through the two sets of floating brackets (33).

5. The rolling mill equipment based on automatic deviation correction function according to claim 4, characterized in that: The fixed bracket (32) has a limiting plate (321) at one end, and the floating bracket (33) is located on the limiting plate (321).

6. The rolling mill equipment based on automatic deviation correction function according to claim 5, characterized in that: The pressure equalization mechanism (6) includes a pressure equalization pipe (61), a valve (62) and a proximity sensor (63), wherein the pressure equalization pipe (61) is provided with a valve (62) in the middle. The inductive correction roller (31) has an inductive plate (35) in the middle, and a placement rod (34) is provided between the two sets of fixed brackets (32). The proximity sensor (63) is located in the middle of the placement rod (34), and the two ends of the equalizing pipe (61) are respectively connected to the pipes of two sets of hydraulic cylinders (21).

7. The rolling mill equipment based on automatic deviation correction function according to claims 1 to 6, characterized in that: The sensing mechanism (3) also includes two sets of reset components (36). The outer rings of the two shaft ends of the sensing correction roller (31) are symmetrically provided with two sets of limiting rings (37). The two sets of limiting rings (37) abut against the two sets of reset components (36) respectively. The reset assembly (36) includes a reset spring (361) and a collar (362), with the reset spring (361) provided on one side of the collar (362). One end of the reset spring (361) is connected to the floating bracket (33), one side of the collar (362) abuts against the limiting ring (37), and the two shaft ends of the induction correction roller (31) pass through the collar (362) and the reset spring (361) on both sides respectively.

8. The rolling mill equipment based on automatic deviation correction function according to claim 1, characterized in that: The rolling mechanism (5) includes an adjusting support roller (51), a working roller (52) and a fixed support roller (53). The working roller (52) is provided in two sets, and the two sets of working rollers (52) are located between the adjusting support roller (51) and the fixed support roller (53). The working roller (52) and the fixed support roller (53) are respectively placed on the machine body (1). The adjusting support roller (51) and the machine body (1) are slidably connected. A hydraulic cylinder (21) is provided above the adjusting support roller (51).

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