Strip steel coiling pinch roll shape grinding device and control method

Abstract

The invention relates to a strip steel coiling pinch roll shape coping device and a control method, the coping device comprises a mounting base, a swing frame, a millstone assembly, a roll shape guiding rule, a hydraulic cylinder and a plate spring, the mounting base is arranged on one side of a pinch roll, the swing frame is hinged to the mounting base, and the hydraulic cylinder drives the swing frame to realize elastic swing. The millstone assembly comprises a millstone, a rubber base and a roll-shaped guiding rule, and the rubber base provides elastic support for the millstone. The hydraulic cylinder drives the millstone and the pinch roll to form soft contact, and adjustment of grinding pressing force is achieved by adjusting oil pressure. The grinding mode comprises whole roller body grinding and local defect repairing, symmetrical grinding is achieved through the riding wheels during local grinding, and roller shape unbalance is avoided. The grinding device is further provided with a driving device, the riding wheel can be controlled to slide in the through groove, and switching of different grinding modes is achieved. According to the control method, through calibration of the relation between the oil pressure of the hydraulic cylinder and the pressing force of the millstone, whole roller body coping or local defect repairing is conducted on the pinch roller regularly, and the accuracy of the coping effect is ensured. The device can realize on-line grinding, reduce manual intervention, improve production efficiency, prolong the service life of the pinch roll and ensure the surface quality of strip steel, and is widely suitable for transformation and new construction of a hot-rolled strip steel production line.

Description

Technical Field

[0001] The invention belongs to the technical field of strip steel production, and relates to a strip steel coiling and pinching roller profile grinding device and a control method. Background Art

[0002] In the production process of hot-rolled strip steel, the strip coiling pinch roller is an important transmission device connecting the finishing mill and the coiler. It is mainly used to clamp the strip steel through the roller surface, and under the drive of the motor and reducer, it works with the final stand finishing mill and the coiler to accurately adjust the tension of the strip steel coil. This is crucial to ensure the stability of the strip steel during the rolling process and the quality of the final product.

[0003] The strip coiling pinch rollers operate under harsh working conditions such as high load, high temperature and strip impact for a long time. As time goes by, various defects will appear on the pinch roller surface, including but not limited to the following common situations:

[0004] 1. Roller surface adhesion: During the friction between the strip and the roller surface, part of the strip material may adhere to the roller surface under high temperature conditions, forming adhesives. Over time, these adhesives will form a thick layer on the roller surface, affecting the surface quality of the strip and gradually causing uneven wear of the roller surface.

[0005] 2. Local bulge or deformation: When the head and tail of the strip pass through the pinch roller, they may be affected by abnormal impact or uneven load distribution, resulting in bulge or deformation on the local area of ​​the roller surface. These defects not only affect the appearance quality of the steel coil, but may also lead to unstable transmission in the subsequent rolling process.

[0006] 3. Uneven wear: Due to the different usage of the roller surface and the transmission process of the strip, the pinch roller will show different degrees of wear at different positions on the roller body. Especially when the roller surface is unevenly stressed or the running speed is different, the wear is often more significant, causing the roller surface shape to change, which in turn affects the transmission accuracy of the strip and the quality of the finished product.

[0007] The occurrence of these defects usually requires downtime. Traditional methods include manual cleaning and grinding or replacement of pinch rolls, which not only stop production, but also increase production costs, extend maintenance cycles, and have a negative impact on the surface quality of the strip. Therefore, how to increase the service life of the pinch rolls, reduce manual intervention and ensure the continuity of the production process has become an important issue that needs to be solved in the field of strip production. Summary of the invention

[0008] In view of this, the object of the present invention is to solve the above-mentioned problem and provide a strip coiling pinch roller roller grinding device and a control method.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A strip coiling pinch roller roller grinding device comprises a mounting base, a swing frame, a grinding stone assembly, a roller ruler, a hydraulic cylinder, and a leaf spring; the mounting base is arranged on one side of the pinch roller; one end of the swing frame is hinged to the mounting base, the hydraulic cylinder is arranged on the mounting base, and one end is hinged to the leaf spring, and the other end of the leaf spring is connected to the swing frame, and under the drive of the hydraulic cylinder, the leaf spring drives the swing frame to realize elastic swing;

[0011] The grinding stone assembly includes a grinding stone and a rubber base, the roller-shaped ruler is fixedly arranged on the outer side of the grinding stone, the grinding stone is arranged on the outer side of the swing frame, and the rubber base is arranged between the grinding stone and the roller-shaped ruler to form an elastic support for the grinding stone; when grinding the pinch roller, the hydraulic cylinder drives the swing frame to swing, and under the action of the leaf spring and the rubber base, the grinding stone and the pinch roller form a soft contact, and the grinding pressing force is adjusted by changing the oil pressure of the hydraulic cylinder.

[0012] Furthermore, the grinding stone assembly also includes a pull rod, the rubber base is fixedly connected to the grinding stone via the pull rod, and one end of the pull rod away from the grinding stone is hinged to the swing frame, so that the rubber base can be separated from the roller ruler.

[0013] Furthermore, a plurality of grinding stone assemblies are arranged side by side along the axial direction of the pinch roller and are symmetrically arranged.

[0014] Furthermore, the swing frame is also provided with a supporting wheel and a driving device for driving the supporting wheel to move, and a through slot is provided in the middle of the roller-shaped ruler; the driving device drives the supporting wheel to slide in or out of the through slot.

[0015] When the supporting wheel is located in the through slot, one end of the supporting wheel passes through the through slot and extends to the outside of the roller-shaped ruler to contact the end surface of the rubber base of part of the grinding stone assembly, so that part of the grinding stone assembly is in contact with the pinch roller to repair the local defects of the roller surface;

[0016] When the supporting wheel is located outside the through groove, the rubber bases of all the grinding stone components are in contact with the roller-shaped ruler, so that the entire roller body of the pinch roller is ground.

[0017] Furthermore, a plurality of support wheels are symmetrically arranged to achieve symmetrical grinding without destroying the symmetry of the roller shape.

[0018] Furthermore, the driving device adopts a screw driving mechanism or a gear rack driving mechanism.

[0019] Furthermore, a limit plate is provided on the swing frame to limit the swing angle of the pull rod.

[0020] A roller profile grinding control method based on the above-mentioned strip coiling pinch roller profile grinding device, calibrating the pressure-clamping force according to production experience: recording the relationship between the value of the hydraulic cylinder oil circuit pressure sensor and the clamping force of the grinding stone clamping roller surface, and establishing a clamping force query table; performing regular roller profile grinding of the entire roller body or repairing local defects of the roller surface according to the defect condition of the pinch roller;

[0021] Among them, the regular roller profile grinding of the entire roller body range is as follows: the pinch roller is on standby rotation, and the supporting wheel is at the standby position. At this time, the supporting wheel does not contact the rubber base, and the rubber base is pressed against the roller profile ruler; the hydraulic cylinder is driven to press the grinding stone against the pinch roller, and when the oil pressure sensor reaches the set value, the position of the hydraulic cylinder is kept unchanged, and the roller profile grinding of the entire roller body is carried out to eliminate the uneven wear of the roller body;

[0022] The local defect repair of the roller surface is as follows: according to the defect position fed back by the rolling mill instrument, the pinch roller is on standby to rotate, the support wheel is driven to move to the defect of the pinch roller, the hydraulic cylinder is driven to press the grinding stone against the pinch roller, and the local defect grinding is performed after the oil circuit pressure sensor reaches the set value for local defect repair.

[0023] Furthermore, when repairing local defects on the roller surface, in order to ensure the symmetry of the clamping force of the pinch roller, the supporting wheels on both sides move simultaneously to perform local grinding on the defective and symmetrical positions of the roller surface.

[0024] The beneficial effects of the present invention are:

[0025] 1. When the grinding stone contacts the roller surface, the present invention realizes soft contact through the combination of the rubber base and the leaf spring, so that the grinding stone can adapt to the slight unevenness of the roller surface during the grinding process. This design not only avoids the damage to the roller surface caused by hard contact, but also realizes automatic compensation of the grinding stone through the elastic support of the rubber base, thereby reducing the influence of grinding stone wear on the grinding effect and further extending the service life of the pinch roller.

[0026] 2. The present invention provides two grinding modes: full roller grinding and local defect grinding. For the problem of uniform wear on the roller surface, full roller grinding can be selected to restore the overall surface quality of the pinch roller; for defects such as local protrusions and adhesion, local defect grinding can be selected to accurately eliminate defects in specific areas. Such a flexible grinding method can be adjusted according to the actual situation in strip production, which not only reduces material waste, but also improves the repair efficiency of the pinch roller.

[0027] 3. The present invention can automatically control the contact between the grinding stone and the pinch roller to achieve fully automatic grinding operation. The device can automatically adjust the pressing force and contact position of the grinding stone according to the degree and position of the roller surface defects, without the need for manual adjustment by workers. This not only reduces the labor intensity, but also avoids the errors and instability caused by human factors, and improves the grinding accuracy and consistency.

[0028] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 It is a schematic diagram of the installation of the roll profile grinding device for the strip coiling pinch roll in the present invention.

[0031] Figure 2 It is the general assembly diagram of the roll shape grinding device for the strip coiling pinch roll in the present invention.

[0032] Figure 3 It is a side view of the roll profile grinding device for the strip coiling pinch roll in the present invention.

[0033] Figure 4 , 5 It is a cross-sectional view of the roll profile grinding device for the strip coiling pinch roll in the present invention.

[0034] Figure numerals: 1-mounting base; 2-hydraulic cylinder; 3-leaf spring; 4-swing frame; 5-pull rod; 6-limiting plate; 7-rubber base; 8-roller ruler; 9-grinding stone; 10-screw drive mechanism; 11-support roller. DETAILED DESCRIPTION

[0035] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0036] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0037] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] See also Figures 1 to 5 , which is a strip coiling pinch roller roller grinding device, including a mounting base 1, a swing frame 4, a grinding stone 9 assembly, a roller shape ruler 8, a hydraulic cylinder 2, and a leaf spring 3; the mounting base 1 is arranged on one side of the pinch roller and is installed on the frame of the coiling pinch roller; the middle part of the hydraulic cylinder 2 is hinged to the mounting base 1, the front end of the swing frame 4 is hinged to the mounting base 1, the front end of the hydraulic cylinder 2 is hinged to the front end of the leaf spring 3, and the tail end of the leaf spring 3 is fixed to the swing frame 4. When the hydraulic cylinder 2 extends, it drives the swing frame 4 to rotate and presses against the roller surface of the pinch roller.

[0039] A plurality of grinding stone 9 assemblies are arranged side by side along the axial direction of the pinch roller and are arranged symmetrically. The grinding stone 9 assembly includes a grinding stone 9, a rubber base 7, and a pull rod 5. A roller-shaped ruler 8 is fixedly arranged on the outside of the grinding stone 9. The grinding stone 9 is arranged on the outside of the swing frame 4. The rubber base 7 is arranged between the grinding stone 9 and the roller-shaped ruler 8 to form an elastic support for the grinding stone 9. When grinding the pinch roller, the hydraulic cylinder 2 drives the swing frame 4 to swing. Under the action of the leaf spring 3 and the rubber base 7, the grinding stone 9 forms a soft contact with the pinch roller, and the grinding pressing force is adjusted by changing the oil pressure of the hydraulic cylinder 2.

[0040] The rubber base 7 is fixedly connected to the grindstone 9 by a pull rod 5. The end of the pull rod 5 away from the grindstone 9 is hinged on the swing frame 4. The grindstone 9 can rotate slightly around the pull rod 5, but is restricted by the front end surface of the rubber base 7 during rotation, so that the rubber base 7 and the roller-shaped ruler 8 can be separated.

[0041] The swing frame 4 is also provided with a supporting wheel 11 and a driving device for driving the supporting wheel 11 to move. A through groove is provided in the middle of the roller-shaped ruler 8. The driving device drives the supporting wheel 11 to slide in or out of the through groove.

[0042] When the supporting wheel 11 is located in the through groove, one end of the supporting wheel 11 passes through the through groove and extends to the outside of the roller-shaped ruler 8 to contact the end surface of the rubber base 7 of part of the grindstone 9 assembly, so that part of the grindstone 9 assembly is in contact with the pinch roller to repair the local defects of the roller surface;

[0043] When the supporting wheel 11 is in standby mode and is located outside the through groove, the rubber bases 7 of all grinding stone 9 components are in contact with the roller-shaped ruler 8, so that the entire roller body of the pinch roller is ground.

[0044] Among them, a plurality of supporting wheels 11 are symmetrically arranged to achieve symmetrical grinding without destroying the symmetry of the roller shape. The driving device can adopt a screw driving mechanism 10 or a gear rack driving mechanism. In this embodiment, the screw driving mechanism 10 is taken as an example. In addition, a limit plate 6 is also installed on the swing frame 4 to limit the swing angle of the pull rod 5.

[0045] During installation, install the grinding device above the upper roller and install the grinding device below the lower roller.

[0046] A roller profile grinding control method based on the above-mentioned strip coiling pinch roller roller profile grinding device, calibrating the pressure-clamping force according to production experience: recording the relationship between the value of the hydraulic cylinder 2 oil circuit pressure sensor and the clamping force of the grinding stone 9 pressing the roller surface, and establishing a clamping force query table; performing regular roller profile grinding of the entire roller body or repairing local defects of the roller surface according to the defect of the pinch roller;

[0047] Among them, the regular roller profile grinding of the entire roller body range is as follows: the pinch roller is on standby and keeps rotating at a uniform speed, and the support wheel 11 is in the standby position, at which time the support wheel 11 does not contact the rubber base 7, and the rubber base 7 is pressed against the roller profile ruler 8; the hydraulic cylinder 2 is driven to press the grinding stone 9 against the pinch roller, and when the oil pressure sensor reaches the set value, the position of the hydraulic cylinder 2 is kept unchanged, and the roller profile grinding of the entire roller body is carried out to eliminate the uneven wear of the roller body;

[0048] The local defect repair of the roller surface is as follows: according to the defect position fed back by the rolling mill instrument, the pinch roller is kept rotating at a constant speed, the driving roller 11 is moved to the defect of the pinch roller, the hydraulic cylinder 2 is driven to press the grinding stone 9 against the pinch roller, and the local defect is repaired after the oil pressure sensor reaches the set value of the local defect repair. To ensure the symmetry of the clamping force of the pinch roller, the supporting rollers 11 on both sides move at the same time to perform local grinding on the defective and symmetrical positions of the roller surface.

[0049] When the grinding work of the pinch roller is completed, the hydraulic cylinder 2 retracts, and the swing frame 4 is driven to swing in the opposite direction through the leaf spring 3, and the grinding stone 9 is away from the pinch roller. The support wheel 11 is driven by the driving device to return to the standby position.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A strip coiling pinch roller roller grinding device, characterized in that: It includes a mounting base, a swing frame, a grinding stone assembly, a roller-shaped ruler, a hydraulic cylinder, and a leaf spring; the mounting base is arranged on one side of the pinch roller; one end of the swing frame is hinged to the mounting base, the hydraulic cylinder is arranged on the mounting base, and one end is hinged to the leaf spring, and the other end of the leaf spring is connected to the swing frame. Under the drive of the hydraulic cylinder, the leaf spring drives the swing frame to realize elastic swing; The grinding stone assembly includes a grinding stone and a rubber base, the roller-shaped ruler is fixedly arranged on the outer side of the grinding stone, the grinding stone is arranged on the outer side of the swing frame, and the rubber base is arranged between the grinding stone and the roller-shaped ruler to form an elastic support for the grinding stone; when grinding the pinch roller, the hydraulic cylinder drives the swing frame to swing, and under the action of the leaf spring and the rubber base, the grinding stone and the pinch roller form a soft contact, and the grinding pressing force is adjusted by changing the oil pressure of the hydraulic cylinder.

2. The strip coiling pinch roller grinding device according to claim 1 is characterized in that: The grinding stone assembly also includes a pull rod, through which the rubber base is fixedly connected to the grinding stone, and one end of the pull rod away from the grinding stone is hinged to the swing frame, so that the rubber base can be separated from the roller ruler.

3. The strip coiling pinch roller grinding device according to claim 2 is characterized in that: A plurality of grinding stone assemblies are arranged side by side along the axial direction of the pinch roller and are symmetrically arranged.

4. The strip coiling pinch roller grinding device according to claim 3 is characterized in that: The swing frame is also provided with a supporting wheel and a driving device for driving the supporting wheel to move. A through groove is provided in the middle of the roller-shaped ruler. The driving device drives the supporting wheel to slide in or out of the through groove. When the supporting wheel is located in the through slot, one end of the supporting wheel passes through the through slot and extends to the outside of the roller-shaped ruler to contact the end surface of the rubber base of part of the grinding stone assembly, so that part of the grinding stone assembly is in contact with the pinch roller to repair the local defects of the roller surface; When the supporting wheel is located outside the through groove, the rubber bases of all the grinding stone components are in contact with the roller-shaped ruler, so that the entire roller body of the pinch roller is ground.

5. The strip coiling pinch roller grinding device according to claim 4 is characterized in that: A plurality of support wheels are symmetrically arranged to achieve symmetrical grinding without destroying the symmetry of the roller shape.

6. The strip coiling pinch roller roller grinding device according to claim 4 is characterized in that: The driving device adopts a screw driving mechanism or a gear rack driving mechanism.

7. The strip coiling pinch roller grinding device according to claim 2, characterized in that: The swing frame is also provided with a limit plate for limiting the swing angle of the pull rod.

8. A roll profile grinding control method for a strip coiling pinch roll profile grinding device according to any one of claims 1 to 7, characterized in that: Calibrate the pressure-clamping force based on production experience: record the relationship between the hydraulic cylinder oil circuit pressure sensor value and the clamping force of the grinding stone clamping roller surface, and establish a clamping force query table; perform regular roll shape grinding of the entire roll body or repair of local defects on the roll surface according to the defects of the pinch roll; Among them, the regular roller profile grinding of the entire roller body range is as follows: the pinch roller is on standby rotation, and the supporting wheel is at the standby position. At this time, the supporting wheel does not contact the rubber base, and the rubber base is pressed against the roller profile ruler; the hydraulic cylinder is driven to press the grinding stone against the pinch roller, and when the oil pressure sensor reaches the set value, the position of the hydraulic cylinder is kept unchanged, and the roller profile grinding of the entire roller body is carried out to eliminate the uneven wear of the roller body; The local defect repair of the roller surface is as follows: according to the defect position fed back by the rolling mill instrument, the pinch roller is on standby to rotate, the support wheel is driven to move to the defect of the pinch roller, the hydraulic cylinder is driven to press the grinding stone against the pinch roller, and the local defect grinding is performed after the oil circuit pressure sensor reaches the set value for local defect repair.

9. The roller profile grinding control method according to claim 8, characterized in that: When repairing local defects on the roller surface, in order to ensure the symmetry of the clamping force of the pinch roller, the supporting wheels on both sides move simultaneously to perform local grinding on the defective and symmetrical positions of the roller surface.

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