Three-roller mill

Abstract

The utility model discloses a three-roller mill, which relates to the field of steel rolling equipment, and comprises a plurality of groups of roller shaft components, the plurality of groups of roller shaft components are arranged on a machine core, and the plurality of groups of roller shaft components are circumferentially arranged on the machine core; the roller shaft assembly comprises a roller ring, the roller ring is rotationally arranged on the sliding seat, and the roller ring is connected with a roller shaft; the roller shaft assembly is connected with a press which is used for driving the roller shaft assembly. A machine base is arranged on the outer side of the machine core, and a gear motor is arranged on the outer side wall of the machine base and used for driving a roller ring of the roller shaft assembly to rotate. In a limited space structure, a driving structure is arranged, the steel bar does not need to pass through a traction roller and a straightening mechanism after being rolled and formed, the outer circle of the steel bar is not abraded any more, and product quality is guaranteed. The cold rolling efficiency of cold-rolled steel bars is improved; and through the set roller replacing mode, the roller replacing operation can be efficiently carried out, and the roller replacing efficiency is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of steel rolling equipment technology, and particularly relates to a three-roll mill. Background Technology

[0002] The rolling mill equipment for producing three-sided ribbed cold-rolled steel bars has roll rings that are evenly distributed in three equal parts around the circumference. Due to spatial constraints, it is difficult to arrange a corresponding transmission system for such a rolling mill. Therefore, existing three-sided ribbed cold-rolled steel bars are generally produced using a drawing process. The three-roll mill no longer has a transmission system. Instead, a traction roller is set up upstream of the rolling mill. The steel bar is wound around the traction roller several times, and the driving force generated by the friction of the traction roller pulls the steel bar to achieve passive rolling production.

[0003] The new national standard GB13788-2024 for cold-rolled ribbed steel bars was released and implemented in September 2024. The new standard has strict requirements on the shape of three-sided ribbed steel bars, especially the height of the transverse ribs.

[0004] Steel bars produced using a drawing process and passive manufacturing method must pass through traction rollers after forming, and straightening is also required when producing straight bars. These two processes inevitably generate strong friction on the outer circumference of the steel bars, especially wearing down the transverse ribs, ultimately resulting in products that do not meet standard quality requirements. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a three-roll mill in which the steel bars no longer need to pass through traction rollers and straightening mechanisms after being rolled into shape, and no longer wear down the outer circle of the steel bars, thus ensuring product quality and solving at least one of the problems in the background technology.

[0006] This invention provides the following technical solution:

[0007] A three-roll mill includes multiple sets of roller assemblies, which are disposed on the mill core and arranged circumferentially on the mill core.

[0008] The roller assembly includes a roller ring, which is rotatably mounted on a sliding seat and connected to the roller shaft;

[0009] The roller assembly is connected to a press, which is used to drive the roller assembly.

[0010] The outer side of the mechanism is equipped with a base, and the outer wall of the base is equipped with a geared motor, which is used to drive the roller ring of the roller assembly to rotate.

[0011] Preferably, the roller assembly further includes a swing arm with a groove for placing a sliding seat, the sliding seat being able to move and adjust within the groove along the length of the swing arm.

[0012] Preferably, the swing arm is provided with an adjusting screw, which is disposed through the groove and is threadedly connected to the sliding seat. The adjusting screw adjusts the movement of the sliding seat within the groove. A bearing seat is provided above the sliding seat, and a roller ring is disposed on the bearing seat. The roller ring is coaxially connected to the roller shaft.

[0013] Preferably, the mechanism includes multiple sets of roller shaft assemblies, a front plate, and a rear plate. The multiple sets of roller shaft assemblies are evenly arranged in a circular pattern between the front plate and the rear plate, and each roller shaft assembly is rotatably connected to the front plate and the rear plate. One end of the swing arm is provided with a hinge shaft, and the roller shaft assembly is rotatably connected to the front plate and the rear plate through the hinge shaft.

[0014] Preferably, the other end of the swing arm is provided with a driving device, which drives the roller assembly to swing around the hinge shaft one; the driving device is a press, the press is provided with a hinge shaft two, which is connected to the front plate and the rear plate through the hinge shaft two, and the end of the lead screw of the press is provided with a hinge shaft three, which is rotatably connected to the swing arm through the hinge shaft three.

[0015] Preferably, the machine base is hollow inside, the core is set inside the machine base, and the machine base is matched with a number of geared motors equal to the number of rollers. The geared motors drive the transmission shaft, and the other end of the transmission shaft is connected to the rollers.

[0016] Preferably, the upper part of the base is provided with a hoisting elevator, the lead screw end of the hoisting elevator is connected to a sprocket, the sprocket is matched with a chain, and the other end of the chain can be connected to the mechanism. The hoisting elevator connects to the mechanism through the sprocket and the chain.

[0017] Preferably, the base has two guide rails symmetrically arranged near the bottom, each guide rail has a trolley, and a guide rail is provided below the trolley, allowing the trolley to slide on the guide rails.

[0018] Preferably, the roller assembly is the core component of the rolling mill. Its main structure includes roller rings fixedly mounted on the roller shaft, with bearing seats on both sides of the roller rings, and the bearing seats are fixedly mounted on sliding seats. After the roller rings are ground, their diameter changes. To ensure the alignment of the three roller rings, the sliding seats can slide laterally on the swing arm under the action of the adjusting screw. When the roller diameter changes, the lateral position is adjusted as needed before being firmly fixed. The mill core mainly consists of three sets of roller assemblies, a front plate, and a rear plate. The front plate and rear plate are connected together by several sets of hinges.

[0019] Three sets of roller assemblies are evenly distributed around the circumference and hinged together by hinge shaft one. Three sets of presses are also evenly distributed around the circumference at corresponding positions and hinged together by hinge shaft two. At the same time, the other end of the roller assembly is hinged to the corresponding press screw. The extension or retraction of the press screw can drive the roller assembly to swing around hinge shaft one, thereby realizing the pressing action.

[0020] The overall structure of the rolling mill includes the core, the base, and the transmission system. The core is bolted to the base via a rear plate. Three sets of geared motors are evenly distributed around the circumference of the base. The output ends of the geared motors are connected to the rollers of the roller assembly via universal joint drive shafts, thus realizing the main drive of the rolling mill.

[0021] A hoisting elevator is also installed on the upper left side of the machine base. When changing rollers, the lead screw of the hoisting elevator is connected to the machine core through sprockets and chains, which can lift the machine core and lower it to a certain distance to place it on the trolley below. Similarly, when installing the machine core, it can be lifted and raised to a certain height.

[0022] Two guide rails are also installed on the left and right sides of the lower part of the machine base. A trolley is installed on each guide rail. When changing rolls, after the core is placed on the trolley, the trolley can move the core laterally a certain distance and then lift it away from the mill for the roll changing operation.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] This invention discloses a three-roll mill that, within a limited space, incorporates a drive structure. After the steel bars are rolled, they no longer need to pass through traction rollers and straightening mechanisms, thus eliminating wear on the outer circumference of the steel bars and ensuring product quality. It also improves the cold rolling efficiency of cold-rolled steel bars and, through its designed roll-changing mechanism, enables efficient roll-changing operations, significantly enhancing roll-changing efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the roller assembly structure of the present invention.

[0027] Figure 2 This is a schematic diagram of the movement structure of the present invention.

[0028] Figure 3 This is a schematic diagram of the overall structure of the rolling mill of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this invention.

[0032] Example:

[0033] refer to Figure 1-3 A three-roll mill includes three sets of roll assemblies arranged circumferentially on a mill core. Each roll assembly includes a roll ring 5, which is rotatably mounted on a sliding seat 2 and connected to a roll 3. A press 8 is connected to the roll assembly, and the press 8 drives the roll assembly. A base 13 is provided on the outer side of the mill core, and a geared motor 14 is provided on the outer wall of the base 13, which drives the roll ring 5 of the roll assembly to rotate.

[0034] The roller assembly also includes a swing arm 1, which has a groove for placing a sliding seat 2. The sliding seat 2 can move and adjust within the groove along the length of the swing arm 1. The swing arm 1 is provided with an adjusting screw 6, which passes through the groove and is threadedly connected to the sliding seat 2. The adjusting screw 6 adjusts the movement of the sliding seat 2 within the groove. A bearing seat 4 is provided above the sliding seat 2, and a roller ring 5 is mounted on the bearing seat 4. The roller ring 5 is coaxially connected to the roller shaft 3.

[0035] refer to Figure 1 The roller assembly is the core component of the rolling mill. Its main structure includes roller rings 5 ​​fixedly mounted on roller shafts 3, with bearing seats 4 on both sides of the roller rings 5, which are fixedly mounted on sliding seats 2. After the roller rings 5 ​​are ground, their diameter changes. To ensure the alignment of the three roller rings 5, the sliding seat 2 can slide laterally on the swing arm 1 under the action of the adjusting screw 6. When the roller diameter changes, the lateral position is adjusted as needed before being firmly fixed. The mill core mainly consists of three sets of roller assemblies and a front plate and a rear plate 7. The front plate and rear plate 7 are connected together by several sets of hinges.

[0036] refer to Figure 2 , ( Figure 2 (The front plate is not shown). The movement includes three sets of roller assemblies, a front plate, and a rear plate 7. The three sets of roller assemblies are evenly arranged in a circle between the front plate and the rear plate 7, and each roller assembly is rotatably connected to the front plate and the rear plate 7. One end of the swing arm 1 is provided with a hinge shaft 9, and the roller assembly is rotatably connected to the front plate and the rear plate 7 through the hinge shaft 9. The other end of the swing arm is provided with a drive device, which drives the roller assembly to swing around the hinge shaft 9. The drive device is a press 8, which is provided with a hinge shaft 2 10, which is connected to the front plate and the rear plate 7. The end of the lead screw of the press 8 is provided with a hinge shaft 3 11, and the lead screw is rotatably connected to the swing arm through the hinge shaft 3 11.

[0037] Three sets of roller assemblies are evenly distributed around the circumference and are hinged together by hinge shaft 9. Three sets of presses 8 are evenly distributed around the circumference at corresponding positions and are hinged together by hinge shaft 10. At the same time, the other end of the roller assembly is hinged to the lead screw of the corresponding press 8. The extension or retraction of the lead screw of the press 8 can drive the roller assembly to swing around hinge shaft 9, thereby realizing the pressing action.

[0038] The overall structure of the rolling mill includes the core, the base 13, and the transmission system. The core is bolted to the base 13 via the rear plate 7. Three sets of geared motors 14 are evenly distributed around the circumference of the base 13. The output ends of the geared motors 14 are connected to the rollers 3 of the roller assembly via universal joint drive shafts 12 to realize the main drive of the rolling mill.

[0039] In one possible implementation, the machine base 13 has a hollow interior, with the movement housed inside. The machine base 13 is externally fitted with a number of geared motors 14 equal to the number of roller assemblies. The geared motors 14 drive a transmission shaft 12, the other end of which is connected to a roller 3. A hoisting lift 15 is mounted on the upper part of the machine base 13. A sprocket 16 is connected to the lead screw end of the hoisting lift 15, and a chain is mounted on the sprocket 16. The other end of the chain can be connected to the movement. The hoisting lift 15 connects to the movement via the sprocket 16 and the chain.

[0040] Two guide rails 17 are symmetrically arranged near the bottom of the base 13. Each guide rail 17 is equipped with a trolley 18. The trolley 18 is located below the guide rail 17 and slides on the guide rail 17.

[0041] A hoisting elevator 15 is also installed on the upper left side of the base 13. When changing rollers, the lead screw of the hoisting elevator 15 is connected to the machine core through the sprocket 16 and chain, which can lift the machine core and lower it to a certain distance to place it on the trolley 18 below. Similarly, when installing the machine core, it can be lifted and raised to a certain height.

[0042] refer to Figure 3 The lower part of the base 13 is also equipped with two guide rails 17 on the left and right. Each guide rail 17 is equipped with a trolley 18. When changing rolls, after the core is placed on the trolley 18, the trolley 18 can move the core laterally a certain distance and then lift it away from the rolling mill for the roll changing operation.

[0043] As one possible implementation method, a roll changing method for a three-roll mill is as follows: First, the core is removed from the mill. The hoisting elevator 15 is connected to the core via sprocket 16 and chain, and pre-tightened to a certain extent to ensure tension. Second, the drive shaft 12 is disassembled from the roll shaft 3, and the connection between the rear plate 7 of the core and the base 13 is disassembled. The hoisting elevator 15 drives the core down, and after the core is placed on the trolley 18, the chain is disconnected from the core. After the core is moved laterally a certain distance, it is lifted off the mill. After being placed horizontally, the front plate is removed, and the hinge shaft and bearing seat 4 are removed in sequence. Finally, the roll ring 5 is replaced. Finally, when the core is reassembled into the mill after replacing the roll ring 5, the roll ring 5 and bearing seat 4 are installed in sequence. If the diameter of the roll ring 5 changes, the adjusting screw 6 of the roll group needs to be adjusted to ensure that the center position of the roll ring 5 hole remains unchanged. After the core is installed, it is returned to the mill in the reverse order of disassembly.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations; any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A three-roll mill, comprising multiple sets of roll assemblies, characterized in that, The multiple sets of roller shaft assemblies are mounted on the movement, and the multiple sets of roller shaft assemblies are arranged in a circular pattern on the movement; The roller assembly includes a roller ring (5), which is rotatably mounted on a sliding seat (2) and connected to a roller shaft (3); The roller assembly is connected to a press (8), which is used to drive the roller assembly; The outer side of the mechanism is provided with a base (13), and the outer wall of the base (13) is provided with a geared motor (14). The geared motor (14) is used to drive the roller ring (5) of the roller shaft assembly to rotate.

2. A three-roll mill according to claim 1, characterized in that, The roller assembly also includes a swing arm (1), which has a groove for placing a sliding seat (2), and the sliding seat (2) can be moved and adjusted within the groove along the length of the swing arm (1).

3. A three-roll mill according to claim 2, characterized in that, The swing arm (1) is provided with an adjusting screw (6), which is installed through the groove and is threadedly connected to the sliding seat (2). The adjusting screw (6) adjusts the sliding seat (2) to move within the groove. A bearing seat (4) is provided above the sliding seat (2), and a roller ring (5) is installed on the bearing seat (4). The roller ring (5) is coaxially connected to the roller shaft (3).

4. A three-roll mill according to claim 2, characterized in that, The mechanism includes multiple sets of roller shaft assemblies, a front plate, and a rear plate (7). The multiple sets of roller shaft assemblies are evenly arranged in a circular pattern between the front plate and the rear plate (7). Each roller shaft assembly is rotatably connected to the front plate and the rear plate (7). One end of the swing arm (1) is provided with a hinge shaft (9). The roller shaft assembly is rotatably connected to the front plate and the rear plate (7) through the hinge shaft (9).

5. A three-roll mill according to claim 4, characterized in that, The other end of the swing arm (1) is provided with a driving device, which drives the roller assembly to swing around the hinge shaft one (9); the driving device is a press (8), the press (8) is provided with a hinge shaft two (10), and is connected to the front plate and the rear plate (7) through the hinge shaft two (10). The screw end of the press (8) is provided with a hinge shaft three (11), and the screw is rotatably connected to the swing arm (1) through the hinge shaft three (11).

6. A three-roll mill according to claim 1, characterized in that, The machine base (13) has a cavity inside, and the core is set inside the machine base (13). The machine base (13) is matched with a number of geared motors (14) equal to the number of rollers. The geared motors (14) drive the transmission shaft (12), and the other end of the transmission shaft (12) is connected to the roller (3).

7. A three-roll mill according to claim 1, characterized in that, The upper part of the base (13) is provided with a hoisting elevator (15). The end of the lead screw of the hoisting elevator (15) is connected to a sprocket (16). A chain is matched on the sprocket (16). The other end of the chain can be connected to the mechanism. The hoisting elevator (15) is connected to the mechanism through the sprocket (16) and the chain.

8. A three-roll mill according to claim 1, characterized in that, The base (13) is symmetrically provided with two guide rails (17) near the bottom. Each guide rail (17) is provided with a trolley (18). The trolley (18) is provided below the guide rail (17) and slides on the guide rail (17).

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