Rolling mill connecting shaft bracket device with buffering and adjusting functions

Abstract

The utility model discloses a rolling mill connecting shaft bracket device with a buffer adjusting function, which is characterized by comprising a bracket body, a sliding plate arranged below the bracket body, a locking mechanism arranged on the rear side of the bracket body, and a spring buffer mechanism arranged on the bracket body, the locking mechanism comprises a locking hydraulic cylinder and a linkage shaft; the spring buffering mechanism comprises an adjusting rod matched with a support on the bracket body, the adjusting rod is sleeved with a spring, the two ends of the spring are sleeved with an upper fixing frame and a lower fixing frame respectively, and an adjusting nut matched with the adjusting rod is arranged above the upper fixing frame. And a connecting block matched with the roller is arranged below the adjusting rod. The chain type bracket effectively solves the problems that a traditional chain type bracket is prone to breakage and shaking and serious in abrasion, has the advantages of being high in positioning accuracy, high in impact resistance and long in service life, and is suitable for heavy rolling mill equipment such as hot rolling mill equipment and cold rolling mill equipment.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical equipment technology, specifically relating to a rolling mill shaft support device with buffer adjustment function. Background Technology

[0002] The mill roll support bracket is a key component in rolling equipment used to support and stabilize the roll connection. Traditional brackets use a chain support structure, connecting the upper and lower roll supports via chains to achieve roll support. However, this structure has significant drawbacks: Chain breakage is common: during rolling, the roll connection is subjected to high-frequency impact loads, and the chain is prone to fatigue fracture under alternating stress, leading to frequent downtime for maintenance; gap vibration: when adjusting the gap between the upper and lower rolls, the chain vibrates due to insufficient rigidity, causing misalignment of the roll connection and affecting the dimensional accuracy of the rolled material; severe bottom wear: the contact surface between the bracket and the mill base lacks effective lubrication and wear-resistant protection, and long-term sliding friction leads to wear on the contact surface, requiring regular replacement of the base guide rails, resulting in high maintenance costs.

[0003] Therefore, there is an urgent need for a shaft support bracket that combines high wear resistance, dynamic locking, and buffer adjustment functions to meet the high-precision and high-efficiency production requirements of modern rolling mills. Utility Model Content

[0004] The purpose of this invention is to provide a mill shaft support device with buffer adjustment function. Through a rigid sliding guide, hydraulic dynamic locking and buffer adjustment integrated structure, it achieves high-precision and high-reliability shaft support, thereby solving the problems in the prior art.

[0005] This utility model is achieved through the following technical solution: a mill roll connecting bracket device with buffer adjustment function, characterized in that it includes: a bracket body, a sliding plate arranged below the bracket body, a locking mechanism arranged on the rear side of the bracket body, and a spring buffer mechanism arranged on the bracket body; the sliding plate is slidably engaged with the mill base guide rail; the locking mechanism includes a locking hydraulic cylinder arranged on the bracket body, a linkage shaft arranged on the piston rod of the locking hydraulic cylinder, the linkage shaft being slidably engaged with two fixing holes on the bracket body; the gap between the two fixing holes is engaged with a fixing part on the mill, and the linkage shaft is simultaneously engaged with a through hole on the fixing part; the spring buffer mechanism has two sets, each engaging with two rolls; the spring buffer mechanism includes an adjusting rod engaging with a bracket on the bracket body, a spring sleeved on the adjusting rod, an upper fixing frame and a lower fixing frame sleeved at both ends of the spring, an adjusting nut engaging with the adjusting rod above the upper fixing frame; and a connecting block engaging with the rolls below the adjusting rod.

[0006] Furthermore, the connecting block and the adjusting rod are engaged by a pin, and the connecting block is provided with a connecting hole that engages with the connecting shaft on the roller.

[0007] Furthermore, the bracket body is provided with a through hole, and the adjusting rod is set in the through hole for lifting and lowering.

[0008] Furthermore, the bracket is also provided with connecting holes, and connecting shafts are provided between the connecting holes. The connecting shafts cooperate with the movable hydraulic cylinders set on the rolling mill or the ground.

[0009] Furthermore, the slide plate includes an upper slide plate and a lower slide plate, which are fixed to the upper and lower surfaces on both sides of the bottom of the bracket body by bolts. The bottom surface of the lower slide plate is provided with a limiting device that cooperates with the guide rail of the rolling mill base.

[0010] The beneficial effects of this utility model are: the structure of this utility model effectively solves the problems of easy breakage, vibration and severe wear of traditional chain-type brackets, and has the advantages of high positioning accuracy, strong impact resistance and long service life. It is suitable for heavy rolling mill equipment such as hot rolling and cold rolling. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a top view of the mill shaft support device of this utility model. Figure 1 (BB view)

[0013] Figure 3 This is a left view of the mill shaft support device of this utility model. Figure 1 (AA view).

[0014] The attached diagram is labeled as follows: 1 is the bracket body; 2 is the upper sliding plate; 3 is the lower sliding plate; 4 is the locking hydraulic cylinder; 5 is the fixing hole; 6 is the linkage shaft; 7 is the connecting hole; 8 is the reinforcing rib plate; 9 is the lower fixing frame; 10 is the upper fixing frame; 11 is the spring; 12 is the adjusting rod; 13 is the adjusting nut; 14 is the connecting block; 15 is the pin; 16 is the roller; 17 is the connecting block pressure plate; 18 is the roller connecting hole; 19 is the fixing part. Detailed Implementation

[0015] Reference Appendix Figure 1-3 This utility model provides a mill shaft support device with buffer adjustment function, including: a support body 1, a sliding plate arranged below the support body 1, a locking mechanism arranged on the rear side of the support body 1, and a spring buffer mechanism arranged on the support body 1; the sliding plate is slidably engaged with the mill base guide rail; the locking mechanism includes a locking hydraulic cylinder 4 arranged on the support body 1, a linkage shaft 6 arranged on the piston rod of the locking hydraulic cylinder 4, the linkage shaft 6 is slidably engaged with two fixing holes 5 on the support body 1; the gap between the two fixing holes is engaged with the fixing part 19 on the mill, and the linkage shaft 6 is simultaneously engaged with the through hole on the fixing part to fix the support body;

[0016] The spring buffer mechanism has two sets, which are respectively engaged with two rollers 16. The spring buffer mechanism includes an adjusting rod 12 that is engaged with a bracket on the bracket body 1. A spring 11 is sleeved on the adjusting rod 12. An upper fixing frame 10 and a lower fixing frame 9 are respectively sleeved on both ends of the spring 11. An adjusting nut 13 that is engaged with the adjusting rod 12 is provided above the upper fixing frame 10. A connecting block 14 that is engaged with the roller is provided below the adjusting rod 12.

[0017] Preferably, the connecting block 14 and the adjusting rod 12 are engaged by a pin 15, and the connecting block is provided with a roller connecting hole 18, which is inserted into the connecting shaft at the end of the roller.

[0018] Preferably, the bracket body 1 is provided with a through hole, and the adjusting rod is set in the through hole for lifting and lowering.

[0019] Preferably, the bracket is also provided with connecting holes 7, and a connecting shaft is provided between the connecting holes. The connecting shaft cooperates with a movable hydraulic cylinder set on the rolling mill or the ground. The bracket body is moved by the extension and retraction of the movable hydraulic cylinder.

[0020] Preferably, the sliding plate includes an upper sliding plate 2 and a lower sliding plate 3, which are fixed to the upper and lower surfaces of the protruding or extended sides on both sides of the bottom of the bracket body by bolts. The bottom surface of the lower sliding plate 3 is provided with a stop edge that matches the guide rail of the rolling mill base. The guide rail is groove-shaped, and the upper sliding plate cooperates with the upper side of the inner surface of the guide rail to ensure the vertical stability of the bracket. The lower sliding plate is L-shaped, and the stop edge cooperates with the inner edge of the lower side of the guide rail to ensure the horizontal (lateral) stability of the bracket body.

[0021] Preferably, the bracket body adopts a welded structure with internal welded reinforcing ribs 8.

[0022] The working process of this utility model is as follows:

[0023] The roller's connecting shaft is fitted with the connecting block, and the connecting block is connected with the adjusting rod. The lower fixed frame on the adjusting rod is fitted with the bracket body, and the nut above the upper fixed frame is used to adjust the adjusting rod and thus adjust the height of the roller. After the bracket body is in place, the locking hydraulic cylinder is activated, driving the linkage shaft to fit with the mill fixing part to fix the bracket body.

[0024] In this invention, the roller is connected to the bracket body via a spring buffer mechanism, and the spring provides buffering when there is a large impact.

[0025] The solution will be further illustrated below with specific embodiments.

[0026] Example: A mill shaft support device with buffer adjustment function, comprising: a support body and a sliding plate assembly.

[0027] The bracket body adopts a welded structure and is made of ZG270-500 cast steel. It has 8 internal welded reinforcing ribs with a thickness of 20mm, which effectively improves the bending stiffness.

[0028] The upper and lower sliding plates are symmetrically arranged at the bottom of the bracket body. The dimensions of the sliding plates are 1000mm×150mm×30mm. They are fixed by 24 sets of M24×120 high-strength countersunk bolts (8.8 grade). The bolt preload is 120N·m. The bolt holes are drilled to ensure positioning accuracy.

[0029] The slide plate surface is machined with guide bosses to form an H8 / f7 clearance fit with the groove of the rolling mill base guide rail (clearance range 0.05-0.2mm).

[0030] Wear-resistant treatment of upper and lower slide plates: The working surface of the slide plate is overlaid with a 3mm thick STELLITE 6 cobalt-based alloy layer, with a hardness ≥58HRC and a friction coefficient ≤0.15. When the rolling mill moves, the hydraulic cylinder at the bottom of the rolling mill is connected to the bracket body through the bracket connection hole, pushing the bracket and the rolling mill to move, so that the slide plate slides along the guide rail groove, and the guide boss restricts lateral displacement.

[0031] Hydraulic locking system:

[0032] The locking hydraulic cylinder is fixed to the bottom surface of the bracket base by eight sets of M20×80 bolts (grade 10.9), and the mounting surface is milled (flatness ≤0.1mm / m). The front end of the hydraulic cylinder piston rod and the linkage shaft adopt an transition fit (H7 / k6) and are fixed to prevent detachment by a Φ10mm cylindrical pin.

[0033] Locking stage of hydraulic locking system: The piston rod of hydraulic cylinder extends outward, pushing the linkage shaft into the bottom connection hole of the rolling mill, realizing the rigid connection between the bracket and the rolling mill (axial positioning error ≤ ±0.1mm).

[0034] Unlocking phase of the hydraulic locking system: The hydraulic cylinder reverses oil supply, the piston rod retracts, the linkage shaft completely exits the connection hole, and the bracket is unlocked.

[0035] The components are assembled in a way that the lower fixing bracket is fixed to the top of the bracket by 6 sets of M16×60 bolts (8.8 grade), and the mounting surface is ground (roughness Ra≤3.2μm).

[0036] Buffer unit assembly: The adjusting rod passes sequentially through the lower fixed frame, spring, and upper fixed frame. The spring is a 60Si2MnA cylindrical helical spring (free height 250mm, wire diameter Φ25mm, stiffness coefficient 100N / mm). The adjusting nut is connected to the top of the adjusting rod via a Tr36×6 trapezoidal thread, with a thread fit length ≥50mm. The connecting block is hinged to the lower end of the adjusting rod via a pin (Φ20h6 tolerance). The connecting block is fixedly connected to the positioning shaft on the roll shaft. The external connecting block pressure plate 17 is used to fix the direction of movement, and the connecting block pressure plate 17 is bolted to the bracket body.

[0037] Initial preload setting: Rotate the adjusting nut to compress the spring to a preload force of 40 kN (as indicated by the pressure gauge), then tighten the nut (torque 60 N·m).

[0038] Dynamic height adjustment: When the gap between the rolls changes, the adjusting nut is manually rotated to move the connecting block up and down (stroke ±40mm) so that the support surface of the bracket is aligned with the axis of the roll.

[0039] Impact load buffering: The rolling impact force is transmitted to the spring through the connecting block. The maximum compression of the spring is 30mm, which absorbs 70% of the impact energy.

[0040] Implementation results: Positioning accuracy: Radial runout of the connecting shaft after the bracket is locked ≤ ±0.1mm (original chain structure ±1.5mm); Wear resistance: Annual wear of the skateboard ≤ 0.8mm, service life ≥ 24 months; Maintenance convenience: Replacing the skateboard takes ≤ 2 hours (original chain replacement takes 8 hours).

Claims

1. A mill shaft support device with buffer adjustment function, characterized in that, include: The bracket body (1) has a sliding plate below it, a locking mechanism on the rear side of the bracket body (1), and a spring buffer mechanism on the bracket body (1). The sliding plate is in sliding engagement with the rolling mill base guide rail; The locking mechanism includes a locking hydraulic cylinder (4) installed on the bracket body (1). A linkage shaft (6) is installed on the piston rod of the locking hydraulic cylinder (4). The linkage shaft (6) is slidably engaged with two fixing holes (5) on the bracket body (1). The gap between the two fixing holes is engaged with the fixing part on the rolling mill, and the linkage shaft (6) is engaged with the through hole on the fixing part at the same time. The spring buffer mechanism has two sets, which are respectively engaged with two rollers; the spring buffer mechanism includes an adjusting rod (12) that is engaged with the bracket on the bracket body (1), a spring (11) is sleeved on the adjusting rod (12), an upper fixing frame (10) and a lower fixing frame (9) are respectively sleeved at both ends of the spring (11), an adjusting nut (13) that is engaged with the adjusting rod (12) is provided above the upper fixing frame (10); a connecting block (14) that is engaged with the roller is provided below the adjusting rod (12).

2. The mill shaft support device with buffer adjustment function according to claim 1, characterized in that, The connecting block and the adjusting rod are connected by a pin. The connecting block is provided with a connecting hole, which is connected to the connecting shaft on the roller.

3. A mill shaft support device with buffer adjustment function according to claim 1, characterized in that, The bracket body (1) is provided with a through hole, and the adjusting rod is set in the through hole for lifting and lowering.

4. A mill shaft support device with buffer adjustment function according to claim 1, characterized in that, The bracket is also provided with connecting holes, and connecting shafts are provided between the connecting holes. The connecting shafts cooperate with the movable hydraulic cylinders set on the rolling mill or the ground.

5. A mill shaft support device with buffer adjustment function according to claim 1, characterized in that, The slide plate includes an upper slide plate and a lower slide plate, which are fixed to the upper and lower surfaces of the bottom sides of the bracket body by bolts. The bottom surface of the lower slide plate is provided with a limiter that cooperates with the guide rail of the rolling mill base.

Images