Rolling mill for rolling bars

Abstract

The utility model discloses a rolling mill for rolling bars, which relates to the technical field of bar rolling and comprises a rolling machine tool, an adjusting mechanism for rolling the bars is arranged on the rolling machine tool and comprises a rolling vertical frame, a motor, an air cylinder, a first roller and a second roller. The rolling vertical frame is fixedly installed on the inner side wall of the rolling machine tool, the L-shaped side rod is fixedly installed at the side end of the rolling vertical frame, the motor is fixedly installed at the side end of the L-shaped side rod, and the air cylinder is fixedly installed at the side end of the L-shaped side rod. According to the utility model, the air cylinder is matched with the motor, so that when the second roller is subjected to overlarge pressure, the air cylinder contracts to drive the thrust ring on the vertical rod to move, so that the transmission rod leaves the bearing groove to brake the first roller and the second roller, the equipment damage possibly caused by sudden stop is avoided, and the safety of the equipment during shutdown is ensured.

Description

Technical Field

[0001] This utility model relates to the field of bar rolling technology, and in particular to a rolling mill for bar rolling. Background Technology

[0002] A bar mill is a specialized rolling equipment that processes steel billets or continuously cast billets into round, square, or other cross-section bars through multiple passes of continuous plastic deformation. Its core consists of rolls, a transmission system, and a control unit, and it is widely used in construction, machinery manufacturing, and other fields.

[0003] Currently, existing rolling equipment (such as patent number: CN221694751U) discloses a multi-segment bar rolling equipment. When this utility model is used, drive motor one and drive motor two are started. Drive motor one can drive multiple sets of extrusion rollers one to rotate simultaneously, and drive motor two can drive multiple sets of extrusion rollers two to rotate simultaneously. This allows multiple segments of bar stock to be processed at the same time, improving processing efficiency and making full use of the driving force of drive motor one and drive motor two.

[0004] However, during the implementation of the above technical solutions, at least the following technical problems were found: In the existing bar rolling process, when uneven pressure occurs on the rolls, the equipment is usually stopped by emergency stopping the motor or emergency braking of the rolls. Direct power cut-off may cause back electromotive force impact on the motor, damaging the inverter power module. At the moment of emergency braking of the rolls, the violent collision between the roll inertial torque and the braking torque can cause damage to the drive shaft and the roll body. Utility Model Content

[0005] Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a rolling mill for bar rolling, solving the technical problems of how, in existing bar rolling processes, when uneven pressure occurs on the rolls, the equipment is usually stopped by emergency motor shutdown or emergency braking of the rolls. Direct power cut-off may cause back EMF impact on the motor, damaging the inverter power module. At the moment of emergency braking of the rolls, the violent collision between the roll inertial torque and the braking torque can cause damage to the drive shaft and the roll body.

[0007] Technical solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A rolling mill for rolling bars includes a rolling mill bed. The rolling mill bed is equipped with an adjustment mechanism for rolling bars. The adjustment mechanism includes a rolling stand, a motor, a cylinder, a first roll, and a second roll. The rolling stand is fixedly installed on the inner side wall of the rolling mill bed. An L-shaped side rod is fixedly installed at the side end of the rolling stand. The motor is fixedly installed at the side end of the L-shaped side rod. The cylinder is fixedly installed at the side end of the L-shaped side rod. Both the first roll and the second roll are rotatably mounted on the rolling stand. The rolling mill bed is equipped with a material guiding device. A main control panel is provided at the side end of the rolling mill bed. A telescopic rod is fixedly installed at the output end of the motor. A limit ring is fixedly installed at the side end of the telescopic rod. A transmission rod is fixedly installed at the side end of the limit ring. A vertical rod is fixedly installed at the side end of the cylinder. A thrust ring is fixedly installed at the upper end of the vertical rod. A drive gear is fixedly installed at the circumferential end of the first roll. Two receiving grooves are formed at the side end of the first roll.

[0010] Preferably, the telescopic rod is equipped with a spring, and the two transmission rods are respectively located on the inner sidewalls of the two receiving grooves.

[0011] Preferably, a driven gear is fixedly installed at the circumferential end of the second roll, the driven gear meshes with the driving gear, a pressure detector is fixedly installed at the side end of the second roll, and an electric wire is fixedly installed between the pressure detector and the cylinder.

[0012] Beneficial effects

[0013] I. This device uses a combination of a cylinder and a motor. When the second roll is subjected to excessive pressure, the cylinder retracts, causing the thrust ring on the upright to move. This moves the transmission rod away from the receiving groove, braking the first and second rolls and preventing equipment damage that may be caused by sudden stops, thus ensuring the safety of the equipment during shutdown.

[0014] Second, this device is equipped with a pressure detector and a cylinder. When the pressure detector detects an abnormal pressure on the second roll, it can drive the cylinder in time to stop the machine in time, avoiding the lag of manual handling and the excessive waste of bar material. Attached Figure Description

[0015] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0016] Figure 1 This is a structural diagram of the rolling mill tool of this utility model;

[0017] Figure 2 This is a structural diagram of the rolling stand of this utility model;

[0018] Figure 3 This is a structural diagram of the first roll of this utility model;

[0019] Figure 4 This is a structural diagram of the motor of this utility model.

[0020] Legend: 1. Rolling mill; 11. Material guiding equipment; 12. Main control panel; 2. Rolling stand; 21. L-shaped side rod; 3. Motor; 31. Telescopic rod; 32. Limiting ring; 33. Transmission rod; 4. Cylinder; 41. Upright rod; 42. Thrust ring; 5. First roll; 51. Drive gear; 52. Receiving groove; 6. Second roll; 61. Driven gear; 62. Pressure detector; 63. Wire. Detailed Implementation

[0021] This application provides a rolling mill for bar rolling, effectively solving the technical problems in existing bar rolling processes where uneven pressure on the rolls often requires emergency motor stop or emergency roll braking to stop the equipment. Direct power cut-off can cause back EMF impact on the motor, damaging the inverter power module. Furthermore, the violent collision between the roll's inertial torque and braking torque during emergency roll braking can damage the drive shaft and roll body. This device, through the cooperation of a cylinder 4 and a motor 3, allows the cylinder 4 to retract when the second roll 6 is under excessive pressure. This retraction of the cylinder 4 moves the thrust ring 42 on the upright 41, causing the drive rod 33 to leave the receiving groove 52 and brake the first roll 5 and the second roll 6, avoiding potential equipment damage from emergency stops and ensuring equipment safety during shutdown.

[0022] Example

[0023] The technical solution in this application embodiment effectively solves the technical problems in existing bar rolling processes, where uneven pressure on the rolls is often addressed by urgently stopping the motor or braking the rolls. Direct power cut-off can cause back EMF impact on the motor, damaging the inverter power module. Furthermore, the violent collision between the roll's inertial torque and braking torque during emergency braking can damage the drive shaft and roll body. The overall approach is as follows: A rolling mill for bar rolling includes a rolling mill 1. The rolling mill 1 is equipped with an adjustment mechanism for rolling the bar. The adjustment mechanism includes a rolling stand 2, a motor 3, a cylinder 4, a first roll 5, and a second roll 6. Roller 6 and rolling stand 2 are fixedly installed on the inner side wall of rolling mill 1. An L-shaped side rod 21 is fixedly installed on the side end of the rolling stand 2. Motor 3 is fixedly installed on the side end of the L-shaped side rod 21. Cylinder 4 is fixedly installed on the side end of the L-shaped side rod 21. The first roll 5 and the second roll 6 are both rotatably installed on the rolling stand 2. The rolling mill 1 is equipped with a material guiding device 11. When rolling the bar, the user can feed the heated bar between the second roll 6 and the first roll 5, start the motor 3 to drive the first roll 5 to rotate. The rotation of the first roll 5 drives the second roll 6 to rotate simultaneously through the meshing of the drive gear 51 and the driven gear 61.

[0024] The side end of the rolling mill 1 is provided with a main control panel 12. The output end of the motor 3 is fixedly installed with a telescopic rod 31. The side end of the telescopic rod 31 is fixedly installed with a limit ring 32. The side end of the limit ring 32 is fixedly installed with a transmission rod 33. The side end of the cylinder 4 is fixedly installed with a vertical rod 41. The upper end of the vertical rod 41 is fixedly installed with a thrust ring 42. When the cylinder 4 retracts, it drives the thrust ring 42 on the vertical rod 41 to move. The movement of the thrust ring 42 will drive the limit ring 32 to move. The movement of the limit ring 32 will drive the transmission rod 33 to leave the inner wall of the receiving groove 52. At this time, the first roll 5 will stop rolling.

[0025] A drive gear 51 is fixedly installed at the circumferential end of the first roll 5. Two receiving grooves 52 are opened at the side end of the first roll 5. A spring is installed inside the telescopic rod 31. Two transmission rods 33 are respectively located on the inner sidewalls of the two receiving grooves 52. A driven gear 61 is fixedly installed at the circumferential end of the second roll 6. The driven gear 61 meshes with the drive gear 51. A pressure detector 62 is fixedly installed at the side end of the second roll 6. An electric wire 63 is fixedly installed between the pressure detector 62 and the cylinder 4 to roll the bar. When rolling, if the bar is not heated locally, the single-pass reduction rate exceeds the roll bearing capacity, or iron oxide scale, broken strip fragments, etc. are mixed into the hot melt bar, the pressure on the first roll 5 and the second roll 6 will be too high. A pressure detector 62 is set at the side end of the second roll 6. When the pressure detector 62 detects that the pressure on the second roll 6 exceeds the movement threshold, it will transmit a signal to the cylinder 4 and start the cylinder 4 to retract.

[0026] To address the problems existing in the prior art, this utility model provides a rolling mill for bar rolling. This device is equipped with a cylinder 4 and a motor 3 working together. When the second roll 6 is subjected to excessive pressure, the cylinder 4 retracts, which drives the thrust ring 42 on the upright 41 to move. This causes the transmission rod 33 to leave the receiving groove 52 and brake the first roll 5 and the second roll 6, avoiding equipment damage that may be caused by sudden stops and ensuring the safety of the equipment when stopping.

[0027] Rolling mill 1: As the basic support structure of the entire rolling mill, it is equipped with adjustment mechanisms and material guiding equipment 11, etc., to provide an operating platform for bar rolling.

[0028] Material guiding device 11: installed on rolling mill 1, used to guide the heated bar material between the first roll 5 and the second roll 6 for rolling operation.

[0029] Main control panel 12: Located at the side end of the rolling mill 1, it can be used to control various operations of the rolling mill and is the interface for operators to interact with the rolling mill.

[0030] Rolling stand 2: Fixedly installed on the inner wall of rolling mill 1, providing support for the rotational installation of the first roll 5 and the second roll 6, and also serving as the mounting base for the L-shaped side rod 21.

[0031] L-shaped side rod 21: Fixed to the side end of the rolling stand 2, used to install the motor 3 and cylinder 4, serving to support and fix these two components.

[0032] Motor 3: Provides power for the rotation of the first roll 5. Its output end is connected to the first roll 5 through telescopic rod 31, limit ring 32 and transmission rod 33, driving the first roll 5 to rotate.

[0033] Telescopic rod 31: connects the output end of motor 3 and limit ring 32. It is equipped with a spring inside, which can buffer the impact during power transmission and also accommodate the movement of limit ring 32.

[0034] Limiting ring 32: It is fixedly installed on the side end of the telescopic rod 31. Its function is to connect the telescopic rod 31 and the transmission rod 33. When the thrust ring 42 pushes the limiting ring 32, it can drive the transmission rod 33 to move.

[0035] Transmission rod 33: Located on the inner sidewall of the two receiving grooves 52 respectively, it transmits the power of motor 3 to the first roller 5, causing the first roller 5 to rotate. When the transmission rod 33 leaves the receiving groove 52, the first roller 5 stops rotating.

[0036] Cylinder 4: Works in conjunction with pressure detector 62. When pressure detector 62 detects that the pressure of the second roll 6 is too high, cylinder 4 retracts, driving the upright rod 41 and thrust ring 42 to move, thereby causing the transmission rod 33 to leave the receiving groove 52, thus braking the first roll 5 and the second roll 6.

[0037] Upright rod 41: Fixedly installed on the side end of cylinder 4, with a thrust ring 42 installed on its upper end to transmit the force of cylinder 4 contraction.

[0038] Thrust ring 42: Installed on the upper end of the upright 41. When the cylinder 4 retracts, the thrust ring 42 moves, pushing the limit ring 32, which in turn drives the transmission rod 33 to move.

[0039] The first roll 5 is rotatably mounted on the rolling stand 2. It drives the second roll 6 to rotate through the meshing of the drive gear 51 and the driven gear 61 to roll the bar.

[0040] Drive gear 51: Fixedly installed at the circumferential end of the first roll 5, meshing with the driven gear 61, and transmitting the rotation of the first roll 5 to the second roll 6.

[0041] Receiving groove 52: It is opened at the side end of the first roll 5 to accommodate the transmission rod 33. When the transmission rod 33 is located in the receiving groove 52, the first roll 5 can rotate with the motor 3. When the transmission rod 33 leaves the receiving groove 52, the first roll 5 stops rotating.

[0042] The second roll 6 is rotatably mounted on the rolling stand 2 and works with the first roll 5 to roll the bar. The driven gear 61 at its circumferential end meshes with the driving gear 51 of the first roll 5 to achieve synchronous rotation.

[0043] Driven gear 61: Fixedly installed at the circumferential end of the second roll 6, meshing with the driving gear 51, so that the second roll 6 can rotate with the first roll 5.

[0044] Pressure detector 62: Installed on the side end of the second roll 6, used to detect the pressure on the second roll 6. When the detected pressure exceeds the movement threshold, it transmits a signal to the cylinder 4 to start the cylinder 4 to contract.

[0045] Working principle:

[0046] When rolling bar stock, the user can feed the heated bar stock between the second roll 6 and the first roll 5, and start the motor 3 to drive the first roll 5 to rotate. The rotation of the first roll 5 drives the second roll 6 to rotate simultaneously through the meshing of the drive gear 51 and the driven gear 61, thus rolling the bar stock. However, during rolling, if the bar stock is locally underheated, the single-pass reduction rate exceeds the roll's load-bearing capacity, or if iron oxide scale, broken strip fragments, etc., are mixed into the hot-melt bar stock, it will cause excessive pressure on the first roll 5 and the second roll 6. A pressure detector 62 is installed at the side end of the device. When the pressure detector 62 detects that the pressure on the second roll 6 exceeds the movement threshold, it transmits a signal to the cylinder 4 and starts the cylinder 4 to retract. The retraction of the cylinder 4 drives the thrust ring 42 on the upright 41 to move. The movement of the thrust ring 42 drives the limit ring 32 to move. The movement of the limit ring 32 drives the transmission rod 33 to move away from the inner wall of the receiving groove 52. At this time, the first roll 5 will stop rolling. After the user observes that the first roll 5 has stopped rolling, he / she can turn off the motor 3 to complete the first roll rolling operation. The braking of rolls 5 and 6 allows the user to manage the bar stock. In existing bar rolling processes, when uneven pressure occurs on the rolls, the equipment is usually stopped by emergency stopping the motor 3 or by emergency braking the rolls. Directly cutting off the power may cause back electromotive force impact on motor 3, damaging the inverter power module. During emergency braking of the rolls, the violent collision between the roll's inertial torque and the braking torque can damage the drive shaft and the roll body. This device, through the cooperation of cylinder 4 and motor 3, can stop the second roll 6 when the pressure is too high. When cylinder 4 retracts, it drives the thrust ring 42 on the upright 41 to move, causing the transmission rod 33 to leave the receiving groove 52 and brake the first roll 5 and the second roll 6. This avoids equipment damage that may be caused by sudden stop and ensures the safety of the equipment when stopping. In addition, this device is equipped with a pressure detector 62 that works in conjunction with cylinder 4. When the pressure detector 62 detects an abnormal pressure on the second roll 6, it can drive cylinder 4 in time to achieve timely stop, avoiding the lag of manual handling and the excessive waste of bar material.

[0047] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A rolling mill for the rolling of bars, comprising a rolling machine bed (1), characterized in that, The rolling machine tool (1) is provided with an adjusting mechanism for rolling the bar; The adjusting mechanism comprises a rolling stand (2), a motor (3), a cylinder (4), a first roller (5) and a second roller (6), the rolling stand (2) is fixedly installed on the inner side wall of the rolling machine tool (1), the side end of the rolling stand (2) is fixedly installed with an L-shaped side rod (21), the motor (3) is fixedly installed on the side end of the L-shaped side rod (21), the cylinder (4) is fixedly installed on the side end of the L-shaped side rod (21), and the first roller (5) and the second roller (6) are both rotatably installed on the rolling stand (2).

2. A rolling mill for rolling of bars as claimed in claim 1, characterized in that: The rolling machine tool (1) is provided with a material guiding device (11), and the side end of the rolling machine tool (1) is provided with a main control panel (12).

3. A rolling mill for the rolling of bars as claimed in claim 2, characterized in that: The output end of the motor (3) is fixedly installed with a telescopic rod (31), and the side end of the telescopic rod (31) is fixedly installed with a limiting ring (32).

4. A rolling mill for the rolling of bars as claimed in claim 3, characterized in that: The side end of the limiting ring (32) is fixedly installed with a transmission rod (33).

5. A rolling mill for the rolling of bars as claimed in claim 4, characterized in that: The side end of the cylinder (4) is fixedly installed with a vertical rod (41), and the upper end of the vertical rod (41) is fixedly installed with a thrust ring (42).

6. A rolling mill for the rolling of bars as claimed in claim 5, characterized in that: The circumferential end of the first roller (5) is fixedly installed with a driving gear (51), and the side end of the first roller (5) is provided with two receiving grooves (52).

7. A rolling mill for the rolling of bars as claimed in claim 6, characterized in that: The telescopic rod (31) is provided with a spring, and the two transmission rods (33) are respectively located on the inner side walls of the two receiving grooves (52).

8. A rolling mill for rolling bars as claimed in claim 7, characterized in that: The circumferential end of the second roller (6) is fixedly installed with a driven gear (61), the driven gear (61) is engaged with the driving gear (51), the side end of the second roller (6) is fixedly installed with a pressure detector (62), and the pressure detector (62) and the cylinder (4) are fixedly installed with an electric wire (63).

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