Hydraulic clamping device for a rolling mill retaining plate

Abstract

The utility model provides a kind of hydraulic clamping device of rolling mill holding plate, to solve the problem of the tightness of prior art manual tension bolt holding plate clamping mode uncontrollable, there is hidden danger of safety. The utility model mainly includes rolling mill frame, upper holding, lower holding plate, fastening nut, fastening screw rod, hydraulic oil cylinder, oil cylinder mounting plate, rigid support, pre-tightening screw rod, pre-embedded seat subassembly, lower support plate and hexagonal head bolt composition. The utility model uses hydraulic oil cylinder to replace traditional manual locking bolt, can realize accurate, stable control to holding plate clamping force, effectively avoid the problem of roll gap difficulty caused by excessive clamping force or roll system movement caused by insufficient clamping force;Through hydraulic system remote control clamping and loosening action, completely eliminate the hidden danger of safety that manual is used in narrow space with sledge hammer operation, improve the safety of operation.

Description

Technical Field

[0001] This utility model relates to the field of rolling mill equipment technology, and in particular to a hydraulic clamping device for rolling mill retaining plates. Background Technology

[0002] In steel rolling production, mill retainer plates are used to clamp the roll bearing housings, ensuring the rolls remain in a stable position during rolling and preventing roll misalignment. Traditional retainer plate clamping methods rely on manual tightening and loosening of locking bolts, which has the following drawbacks: The clamping force relies entirely on manual adjustment, and the tightness is uncontrollable: too tight a clamping force will make it difficult to open the roller gap and hold the plate open; too loose a clamping force will cause the roller system to shift, the die shape to be unstable, and affect the dimensional accuracy of the rolled piece. On the other hand, the operating space is limited, and it is safe to use a sledgehammer to tighten the clamping force manually in a confined space, which may cause the operator to fall.

[0003] Therefore, there is an urgent need for a retaining plate clamping device that can precisely control the clamping force and operate safely and reliably. Utility Model Content

[0004] This application addresses the shortcomings of the prior art by providing a hydraulic clamping device for a rolling mill retainer plate. Based on the hydraulic cylinder, the device applies the clamping force of the retainer plate, achieving precise and adjustable control of the clamping force and improving rolling stability and operational safety.

[0005] The technical solution adopted in this utility model is as follows: A hydraulic clamping device for a rolling mill retainer plate includes an upper retainer plate and a lower retainer plate connected to one side of the rolling mill stand. A rigid support is also provided on one side of the rolling mill stand. A cylinder mounting plate is correspondingly provided between the upper and lower retainer plates and the rigid support. At least two sets of hydraulic cylinders are provided on the upper cylinder mounting plate, and at least one set of hydraulic cylinders is provided on the lower cylinder mounting plate. The drive end of each set of hydraulic cylinders faces the corresponding retainer plate and provides a preload force.

[0006] Furthermore, each hydraulic cylinder is also connected to a control valve assembly at its control end.

[0007] Furthermore, the control valve group includes, in sequence from the external hydraulic system to the hydraulic cylinder body, a three-position four-way solenoid directional valve, a solenoid ball valve, a one-way throttle valve, and a safety relief valve.

[0008] Furthermore, each of the cylinder mounting plates is connected to the rigid bracket body via a pre-tightening screw.

[0009] Furthermore, the rigid bracket body is also provided with a lower support plate for supporting the cylinder mounting plate, and each of the lower support plates is fixedly connected to the bottom threaded hole of the cylinder mounting plate by a hexagonal head bolt.

[0010] Furthermore, the rigid bracket is also provided with a pre-embedded seat assembly inside, which is fixedly connected to the lower support plate on the outer surface of the rigid bracket.

[0011] Furthermore, the cylinder mounting plate and the retaining plate are connected by a fastening screw, and a fastening nut is threaded onto the fastening screw.

[0012] The advantages of this utility model over the prior art are as follows: 1) Controllable and adjustable clamping force: The use of hydraulic cylinders to replace traditional manual locking bolts enables precise and stable control of the clamping force of the retaining plate, effectively avoiding the difficulty of swaying the roll gap caused by excessive clamping force or the problem of roll system movement caused by insufficient clamping force, thereby significantly improving the dimensional accuracy of the rolled piece and the stability of the roll profile.

[0013] 2) Operational safety: The clamping and releasing actions are remotely controlled by the hydraulic system, which completely eliminates the safety hazards of manually operating a sledgehammer in a confined space and improves the safety and convenience of equipment operation.

[0014] 3) Strong structural rigidity and stable installation: By setting up multiple support and connection structures such as rigid brackets, pre-embedded seat components, lower support plates and pre-tightening screws, the overall rigidity and impact resistance of the cylinder mounting plate are enhanced, ensuring stable and reliable operation of the device during the rolling process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the hydraulic control principle of the control valve group in this utility model.

[0016] The components include: 1. Rolling mill stand; 2. Upper retaining plate; 3. Lower retaining plate; 4. Fastening nut; 5. Fastening screw; 6. Hydraulic cylinder; 7. Cylinder mounting plate; 8. Rigid bracket; 9. Pre-tightening screw; 17. Embedded seat assembly; 18. Lower support plate; 19. Hexagonal head bolt. Detailed Implementation

[0017] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0018] like Figure 1 and Figure 2As shown, this utility model provides a hydraulic clamping device for a rolling mill retaining plate, which includes an upper retaining plate 2 and a lower retaining plate 3 connected to one side of the rolling mill stand 1. A rigid support 8 is also provided on one side of the rolling mill stand 1. A cylinder mounting plate 7 is also provided between the upper retaining plate 2 and the lower retaining plate 3 relative to the rigid support 8. At least two sets of hydraulic cylinders 6 are provided on the upper cylinder mounting plate 7, and at least one set of hydraulic cylinders 6 is provided on the lower cylinder mounting plate 7. The driving end of each set of hydraulic cylinders 6 faces the corresponding retaining plate and provides a preload force.

[0019] In one embodiment of this utility model, each hydraulic cylinder 6 is further connected to a control valve assembly at its control end.

[0020] In one embodiment of this utility model, the control valve group includes, in sequence from the external hydraulic system to the hydraulic cylinder 6 body, a three-position four-way solenoid directional valve, a solenoid ball valve, a one-way throttle valve, and a safety relief valve.

[0021] In one embodiment of this utility model, each of the cylinder mounting plates 7 is connected to the rigid bracket body 8 via a pre-tightening screw 9.

[0022] In one embodiment of this utility model, a lower support plate 18 for supporting the cylinder mounting plate 7 is also provided laterally on the rigid bracket 8 body. Each of the lower support plates 18 is fixedly connected to the bottom threaded hole of the cylinder mounting plate by a hexagonal head bolt 19.

[0023] In one embodiment of this utility model, a pre-embedded seat assembly 17 is further provided inside the rigid bracket 8, and the pre-embedded seat assembly 17 is fixedly connected to the lower support plate 18 on the outer surface of the rigid bracket 8.

[0024] In one embodiment of this utility model, the cylinder mounting plate 7 and the retaining plate are connected by a fastening screw 5, and a fastening nut 4 is threaded onto the fastening screw 5.

[0025] The specific structure and working principle of this utility model are as follows: This utility model includes two retaining plates, upper and lower. Two sets of hydraulic cylinders 6 are mounted on the upper retaining plate 2, and one set of hydraulic cylinders 6 is mounted on the lower retaining plate 3. Taking a rolling mill as the operating scenario, the workpiece rail head passing through the pass is on the drive side, and the rail bottom is on the operating side. The axial force generated by metal deformation analysis is directed towards the drive side, so the axial force on the operating side is very small, as observed in actual field conditions. Therefore, in this embodiment, the strength of the screw fixing the cylinder mounting plate 7 and the use of hydraulic cylinders 6 to apply clamping force to the retaining plates are feasible. Specifically, based on an axial force of 2500 kN, two hydraulic cylinders (each with a thrust of 60 tons) are installed at the inlet and outlet of the upper retaining plate 2; one hydraulic cylinder (each with a thrust of 100 tons) is installed at the inlet and outlet of the lower retaining plate 3; the stroke of each hydraulic cylinder 6 is 20 mm. According to experiments, under these operating parameters, the thrust of the hydraulic cylinders 6 still has a large margin.

[0026] The motion control principle of hydraulic cylinder 6: Please refer to [link / reference]. Figure 2 Where A is a Y-type three-position four-way solenoid directional valve with a neutral position function; B is a solenoid ball valve; C is a one-way throttle valve; D is a safety relief valve; P is hydraulic pressure from the BD1 hydraulic system, and T returns to the BD1 hydraulic system. When in the roller changing state: solenoid directional valve A's a is energized, b is de-energized, and solenoid ball valve B's a is energized; When the roll system enters the rolling mill state: solenoid directional valve A's b is energized and a is de-energized; solenoid ball valve B's a is energized; When in calibration state: neither a nor b of solenoid directional valve A is energized, while a of solenoid ball valve B is energized; When in the rolling mill state: neither a nor b of solenoid directional valve A should be energized, and a of solenoid ball valve B should not be energized. When in the oscillating roller gap state: neither a nor b of the solenoid directional valve A is energized, while a of the solenoid ball valve B is energized.

[0027] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A hydraulic clamping device for a rolling mill retainer plate, characterized in that: The structure includes an upper retaining plate (2) and a lower retaining plate (3) connected to one side of the mill stand (1). A rigid support (8) is also provided on one side of the mill stand (1). A hydraulic cylinder mounting plate (7) is also provided between the upper retaining plate (2) and the lower retaining plate (3) relative to the rigid support (8). At least two sets of hydraulic cylinders (6) are provided on the upper hydraulic cylinder mounting plate (7), and at least one set of hydraulic cylinders (6) is provided on the lower hydraulic cylinder mounting plate (7). The driving end of each set of hydraulic cylinders (6) faces the corresponding retaining plate and provides preload force.

2. The hydraulic clamping device for a rolling mill retaining plate as described in claim 1, characterized in that: Each hydraulic cylinder (6) is also connected to a control valve assembly at its control end.

3. The hydraulic clamping device for a rolling mill retaining plate as described in claim 2, characterized in that: The control valve group includes, in sequence, a three-position four-way solenoid directional valve, a solenoid ball valve, a one-way throttle valve, and a safety relief valve, from the external hydraulic system to the hydraulic cylinder (6) body.

4. The hydraulic clamping device for a rolling mill retaining plate as described in claim 1, characterized in that: Each of the cylinder mounting plates (7) is connected to the rigid bracket (8) body by a preload screw (9).

5. The hydraulic clamping device for a rolling mill retaining plate as described in claim 1, characterized in that: The rigid bracket (8) body is also provided with a lower support plate (18) for supporting the cylinder mounting plate (7) extending laterally. Each of the lower support plates (18) is fixedly connected to the bottom threaded hole of the cylinder mounting plate by a hexagonal head bolt (19).

6. The hydraulic clamping device for a rolling mill retaining plate as described in claim 5, characterized in that: The rigid bracket (8) is also provided with a pre-embedded seat assembly (17), which is fixedly connected to the lower support plate (18) on the outer surface of the rigid bracket (8).

7. The hydraulic clamping device for a rolling mill retaining plate as described in claim 1, characterized in that: The cylinder mounting plate (7) and the retaining plate are connected by a fastening screw (5), and a fastening nut (4) is threaded onto the fastening screw (5).

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