A circumferentially adjustable crown roll

Abstract

The utility model belongs to the field of roll technology, concretely relates to a kind of circumferential adjustable convexity roll, including roll mandrel, roll sleeve, sealing device and hydraulic oil supercharging equipment, the outer periphery of roll mandrel is integrally provided with two outer convex rings, the roll sleeve is installed on the two outer convex rings of roll mandrel outer periphery in the way of interference fit, and interference fit is formed with closed cavity between the two outer convex rings between roll mandrel and roll sleeve.The utility model is cooperated with the structure of roll sleeve and closed cavity, utilizes hydraulic oil supercharging equipment to accurately control the pressure in closed cavity, makes the pressure change directly act on the roll face convexity of roll sleeve, realizes dynamic adjustment.This structure can effectively compensate the roll face shape change caused by rolling load change, convexity deviation, thermal expansion, wear or uneven incoming material and other factors, optimizes the elongation distribution in plate rolling process by real-time adjustment of roll face convexity, thereby significantly improves the plate shape control precision and rolling quality.

Description

Technical Field

[0001] This utility model belongs to the field of rolling mill technology, specifically relating to a circumferentially adjustable crown roll. Background Technology

[0002] In the field of sheet metal rolling, especially in the production of ultra-thin aluminum foil and steel plates, the performance of the rolling mill directly determines the quality of the final product. Currently, two-roll, four-roll, six-roll, and even multi-roll mills are widely used in the rolling of these ultra-thin materials, achieving precise control over the thickness of the sheet through multi-roll combinations. Ultra-thin aluminum foil typically has a thickness of 0.006-0.2 mm and is mainly used in food packaging, capacitors, and lithium battery current collectors; ultra-thin steel plates have a cold-rolled range of 0.1-0.5 mm and are mainly used in household appliances and automobiles; ultra-thin steel plates range from 0.02-0.05 mm and are used in precision electronic components and flexible circuit substrates.

[0003] However, in actual production, due to factors such as excessive roll crown, irregular incoming plate shape, uneven temperature distribution, or excessive rolling load, the plate is prone to instability such as edge waviness or center waviness, which seriously affects the flatness of the product and the yield.

[0004] Existing technologies primarily rely on adjusting the roll gap to address these issues, but this method has significant limitations. First, the crown of traditional rolls is typically fixed, making real-time adjustment impossible based on dynamic changes during rolling (such as thermal expansion and wear), resulting in deviations between the roll gap shape and the ideal state. Second, ultra-thin aluminum foil and steel plates are extremely sensitive to the rolling process; even slight crown deviations or temperature gradients can cause uneven material flow, leading to edge or center waviness. For example, excessive roll crown results in excessive elongation in the center of the plate, easily causing center waviness; conversely, insufficient crown or rapid edge cooling leads to insufficient edge elongation, resulting in edge waviness.

[0005] To address these issues, this invention proposes a circumferentially adjustable crown roller. Utility Model Content

[0006] The purpose of this invention is to provide a circumferentially adjustable crown roller that can solve the above-mentioned technical problems.

[0007] The specific technical solution adopted by this utility model is as follows:

[0008] This utility model provides a circumferentially adjustable crown roller, including a roller mandrel, a roller sleeve, a sealing device and a hydraulic oil pressurizing device. The outer circumference of the roller mandrel is integrally provided with two outer convex rings. The roller sleeve is installed on the two outer convex rings on the outer circumference of the roller mandrel by means of interference fit. The two outer convex rings between the roller mandrel and the roller sleeve form a sealed cavity after interference fit.

[0009] The roll mandrel is provided with a main fluid pipeline, and two sets of branch filling pipelines, which are connected to the main fluid pipeline, are provided between the two outer convex rings on the roll mandrel. Both sets of branch filling pipelines penetrate the outer wall of the roll mandrel and are connected to the sealed cavity.

[0010] A high-pressure, high-speed rotary joint is embedded in one side of the roll mandrel, and the high-pressure, high-speed rotary joint is fastened to one side of the roll mandrel by high-strength bolts. The outlet end of the high-pressure, high-speed rotary joint is connected to the main fluid pipeline.

[0011] Preferably, two sealing devices are provided, and the two sealing devices are respectively embedded in the grooves opened on both sides of the roll sleeve. The sealing devices are installed on the outer convex ring with the roll sleeve by interference fit, and the sides of the roll sleeve, the sealing devices and the outer convex ring are on the same vertical plane.

[0012] Preferably, the hydraulic oil booster is located on one side of the roll mandrel, and a pressure-resistant rubber hose and a high-pressure hose are provided on one side of the roll mandrel. One side of the pressure-resistant rubber hose and the high-pressure hose are installed on the hydraulic oil booster, and the other side is installed on the inlet end of the high-pressure high-speed rotary joint.

[0013] Preferably, the two sets of branch filling lines are located close to the opposite sides of the two convex rings, and the branch filling lines are configured in a cross shape, with the central intersection point interconnected with the main fluid line.

[0014] Preferably, the pressure change of the hydraulic oil booster device pressing into the sealed cavity through the main fluid pipeline is directly proportional to the expansion convexity of the roll sleeve.

[0015] Preferably, the expansion crown of the roll sleeve is set between 0 and 0.15 mm.

[0016] Preferably, the method of mounting the roll mandrel on the rolling mill is the same as the method of mounting the rolls on existing rolling mills.

[0017] The beneficial effects are:

[0018] This invention utilizes a hydraulic oil pressurization device to precisely control the pressure within the sealed cavity through a mating structure between the roll sleeve and the sealed cavity. This pressure change directly affects the roll surface crown of the roll sleeve, achieving dynamic adjustment. This structure effectively compensates for roll surface shape changes caused by factors such as rolling load variations, crown deviation, thermal expansion, wear, or uneven material feeding. By adjusting the roll surface crown in real time, it optimizes the elongation distribution during the sheet rolling process, thereby significantly improving sheet shape control accuracy and rolling quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the vertical cross-sectional structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the right-angle cross-section structure of this utility model;

[0022] Figure 4 This is a schematic diagram showing the convexity variation of this utility model under various pressure conditions.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Roll mandrel; 2. Roll sleeve; 3. Outer convex ring; 4. Sealed cavity; 5. Sealing device; 6. Main fluid pipeline; 6a. Branch filling pipeline; 7. High-pressure high-speed rotary joint; 8. Hydraulic oil booster equipment; 81. Pressure-resistant rubber hose; 82. High-pressure hose. Detailed Implementation

[0025] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0026] like Figure 1-3 As shown, a circumferentially adjustable crown roll includes a roll mandrel 1, a roll sleeve 2, a sealing device 5, and a hydraulic oil booster 8. The roll mandrel 1 has two external convex rings 3 integrally arranged on its outer circumference. The roll sleeve 2 is installed on the two external convex rings 3 on the outer circumference of the roll mandrel 1 by an interference fit. The two external convex rings 3 between the roll mandrel 1 and the roll sleeve 2 form a sealed cavity 4 after the interference fit. The roll sleeve 2 is made of forged steel and has undergone two special heat treatments to give the surface high hardness and the interior high toughness. The special heat treatments include tempering, quenching, and tempering heat treatment processes.

[0027] A main fluid pipeline 6 is provided inside the roll mandrel 1. Two sets of branch filling pipelines 6a, which are interconnected with the main fluid pipeline 6, are provided between the two outer protruding rings 3 on the roll mandrel 1. Both sets of branch filling pipelines 6a pass through the outer wall of the roll mandrel 1 and are interconnected with the sealed cavity 4.

[0028] A high-pressure high-speed rotary joint 7 is embedded in one side of the roll mandrel 1, and the high-pressure high-speed rotary joint 7 is fastened to one side of the roll mandrel 1 by high-strength bolts. The outlet end of the high-pressure high-speed rotary joint 7 is interconnected with the main fluid pipeline 6.

[0029] As an optional implementation, two sealing devices 5 are provided, and the two sealing devices 5 are respectively embedded in the grooves opened on both sides of the roll sleeve 2. The sealing devices 5 and the roll sleeve 2 are installed on the outer convex ring 3 with an interference fit, and the sides of the roll sleeve 2, the sealing devices 5 and the outer convex ring 3 are on the same vertical plane. This can improve the flatness of the sides and the support strength after the roll sleeve 2, the outer convex ring 3 and the sealing devices 5 are assembled with an interference fit.

[0030] See attached document Figure 2 and attached Figure 3 The hydraulic oil booster device 8 is installed on one side of the roll mandrel 1. A pressure-resistant rubber hose 81 and a high-pressure hose 82 are installed on one side of the roll mandrel 1. One side of the pressure-resistant rubber hose 81 and the high-pressure hose 82 are installed on the hydraulic oil booster device 8, and the other side is installed on the inlet end of the high-pressure high-speed rotary joint 7. The working pressure of the pressure-resistant rubber hose 81 is 0-0.3 MPa and is used for lubrication of the high-pressure high-speed rotary joint 7. The working pressure of the high-pressure hose 82 is 0-49 MPa and is used for supplying the convexity stamping of the roll sleeve 2. In this way, the hydraulic oil booster device 8 can perform stamping treatment on the sealed cavity 4 between the rotating roll mandrel 1 and the roll sleeve 2 through the high-pressure high-speed rotary joint 7.

[0031] Furthermore, the two sets of branch filling pipes 6a are close to the opposite sides of the two outer convex rings 3. The branch filling pipes 6a are set in a cross shape, and the center intersection point is connected to the main fluid pipe 6. This allows the branch filling pipes 6a to uniformly press the sealed cavity 4, thereby limiting the two sides of the roll sleeve 2 after interference fit and maintaining the convexity of the roll sleeve 2 after expansion.

[0032] Furthermore, the pressure change of the hydraulic oil booster 8, which pressurizes the sealed cavity 4 through the main fluid pipeline 6, is directly proportional to the expansion crown of the roll sleeve 2. Thus, by controlling the hydraulic oil pressure in the sealed cavity 4, the crown of the roll sleeve 2 can be adjusted accordingly, thereby addressing the crown adjustment during the rolling of aluminum foil and steel plates.

[0033] As attached Figure 4 As shown, since the convexity of the roll sleeve 2 is directly proportional to the pressure in the sealed cavity 4, and can be adjusted by the hydraulic oil booster device 8, the convexity of the roll sleeve 2 can be adjusted by comparing the change in oil pressure with the change in the roll sleeve 2, based on the detection of the plate shape instrument. The pressure adjustment accuracy can reach ±0.5Mpa, and the pressure response is 9.8Mpa / s, which is fully capable of adapting to the automatic control of the plate shape.

[0034] Furthermore, the expansion crown of the roll sleeve 2 is set between 0 and 0.15 mm, so that the crown change of the roll sleeve 2 can cope with the crown change when aluminum foil and steel plate are rolled into ultra-thin sheets.

[0035] Furthermore, the installation method of the roll mandrel 1 on the rolling mill is consistent with the existing roll installation method on the rolling mill, so that the crown roll can be replaced with the existing rolling mill, thereby improving the replacement effect.

[0036] With the above structure, when the hydraulic oil booster 8 is started, high-pressure oil is delivered to the high-pressure high-speed rotary joint 7 through the pressure-resistant rubber hose 81 and the high-pressure hose 82, and then enters the cross-shaped branch filling pipeline system 6a via the main fluid pipeline 6. During the high-speed operation of the roll, the high-pressure oil is evenly injected into the sealed cavity 4 formed between the roll mandrel 1 and the roll sleeve 2 through the branch filling pipeline 6a. As the oil pressure gradually increases from 0 to 49 MPa, a uniform radial pressure field is formed in the sealed cavity 4. This pressure field acts on the inner wall of the roll sleeve 2, causing it to undergo elastic deformation. Since the two ends of the roll sleeve 2 are mechanically constrained by the outer convex ring 3, the pressure action is mainly converted into radial expansion in the middle of the roll sleeve 2. According to the principle of material elasticity, the change in crown of the roll sleeve 2 is linearly proportional to the oil pressure in the sealed cavity 4. By monitoring and adjusting the hydraulic system pressure in real time, the crown change of the roll sleeve 2 can be precisely controlled within the range of 0-0.15mm. When edge waviness is detected in the sheet, the system automatically increases the oil pressure to increase the crown in the middle of the roll sleeve to compensate for the excessive edge extension. Conversely, when center waviness occurs, the oil pressure is reduced to decrease the crown. The entire adjustment process is completed under continuous roll operation, with a response time of less than 0.5 seconds. Furthermore, the special heat treatment process of the roll sleeve 2 ensures that it can maintain stable mechanical properties and dimensional accuracy under repeated deformation conditions, thereby realizing dynamic crown compensation in the ultra-thin sheet rolling process.

[0037] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part all adopt conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art, and is common knowledge in the field. Furthermore, this application is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail here. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, are implemented according to conventional methods in the field.

Claims

1. A circumferentially adjustable crown roller, characterized in that: The device includes a roll mandrel (1), a roll sleeve (2), a sealing device (5), and a hydraulic oil booster (8). The roll mandrel (1) has two external convex rings (3) integrally arranged on its outer circumference. The roll sleeve (2) is installed on the two external convex rings (3) on the outer circumference of the roll mandrel (1) by an interference fit. The two external convex rings (3) between the roll mandrel (1) and the roll sleeve (2) form a sealed cavity (4) after interference fit. The main fluid pipeline (6) is provided inside the roll mandrel (1). Two sets of branch filling pipelines (6a) are provided between the two outer convex rings (3) on the roll mandrel (1), both of which are interconnected with the main fluid pipeline (6). Both sets of branch filling pipelines (6a) pass through the outer wall of the roll mandrel (1) and are interconnected with the sealed cavity (4). A high-pressure high-speed rotary joint (7) is embedded in one side of the roll mandrel (1), and the high-pressure high-speed rotary joint (7) is fastened to one side of the roll mandrel (1) by high-strength bolts. The outlet end of the high-pressure high-speed rotary joint (7) is interconnected with the main fluid pipeline (6).

2. The circumferentially adjustable crown roller according to claim 1, characterized in that: The sealing device (5) is configured as two, and the two sealing devices (5) are respectively embedded in the grooves opened on both sides of the roll sleeve (2). The sealing device (5) and the roll sleeve (2) are installed on the outer convex ring (3) with interference fit, and the sides of the roll sleeve (2), the sealing device (5) and the outer convex ring (3) are on the same vertical plane.

3. The circumferentially adjustable crown roller according to claim 2, characterized in that: The hydraulic oil booster (8) is set on one side of the roll mandrel (1). A pressure-resistant rubber hose (81) and a high-pressure hose (82) are provided on one side of the roll mandrel (1). One side of the pressure-resistant rubber hose (81) and the high-pressure hose (82) are installed on the hydraulic oil booster (8), and the other side is installed at the inlet end of the high-pressure high-speed rotary joint (7).

4. The circumferentially adjustable crown roller according to claim 3, characterized in that: The two sets of branch filling lines (6a) are located close to the opposite sides of the two convex rings (3). The branch filling lines (6a) are configured in a cross shape, and the central intersection point is interconnected with the main fluid line (6).

5. A circumferentially adjustable crown roller according to claim 4, characterized in that: The pressure change of the hydraulic oil booster (8) pressing into the sealed cavity (4) through the main fluid pipeline (6) is directly proportional to the expansion convexity of the roll sleeve (2).

6. A circumferentially adjustable crown roller according to claim 5, characterized in that: The expansion convexity of the roll sleeve (2) is set between 0 and 0.15 mm.

7. A circumferentially adjustable crown roller according to claim 6, characterized in that: The installation method of the roll mandrel (1) on the rolling mill is the same as the roll installation method on the existing rolling mill.

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