A single roll driven rolling mill device and rolling method

Abstract

The application relates to the technical field of metal rolling, and discloses a single-roller-driven rolling mill device and a rolling method, which comprise a supporting platform; a lower work roller is arranged on the supporting platform; an upper work roller is arranged on the supporting platform and corresponds to the lower work roller in an up-down mode, so that a roller gap is formed between the upper work roller and the lower work roller; a driving piece output end is connected with the lower work roller; a hydraulic accumulator output end is connected with a reversing piece, the reversing piece is connected with a hydraulic motor, and an output end of the hydraulic motor is connected with the lower work roller. The application solves the problem that the upper work roller and the lower work roller cannot rotate simultaneously to realize biting-in conditions due to the existence of the roller gap when the medium plate rolling mill is single-roller-driven, and can make the rolling piece and the upper work roller and the lower work roller generate sufficient friction and shearing force, increase the 'peak shaving' effect of the unit pressure distribution of rolling, reduce the rolling deformation energy, and thus reduce the energy consumption of the medium plate rolling.

Description

Technical Field

[0001] This invention relates to the field of metal rolling technology, and in particular to a single-roll driven rolling mill apparatus and rolling method. Background Technology

[0002] Medium and heavy plate rolling mills are rolling equipment used to roll medium and heavy steel plates. They are mainly used in the manufacture of transportation vehicles (such as automobiles, tractors, ships, railway vehicles, and aviation machinery), steel structural components (such as various storage containers, boilers, bridges, and other industrial structural components), welded pipes, and general machinery products. Heavy plates are mainly used in shipbuilding, machinery manufacturing, bridge construction, and pressure vessels. In my country, the main products of medium and heavy plate rolling mills are ordinary medium and heavy plates such as carbon steel and low-alloy structural steel.

[0003] Single-roll driven rolling can reduce the peak rolling force and achieve energy saving and consumption reduction. It is mainly used in the field of thin strip rolling, but single-roll driven rolling of medium and heavy plates has not yet been realized. The main reason is that single-roll driven rolling of thin strip achieves simultaneous rotation of the upper and lower work rolls and bites into the workpiece by pre-pressing the upper and lower work rolls, thereby performing zero roll gap or negative roll gap rolling.

[0004] However, medium and heavy plate rolling requires a certain roll gap value. When driven by a single roll, the upper work roll cannot rotate synchronously with the lower work roll, thus failing to achieve the bite of the rolled piece. At the same time, since the frictional force in the deformation zone of medium and heavy plate rolling is much greater than the damping of the upper roll system itself (such as bearing friction damping), the "peak reduction" effect of rolling force is not obvious. Summary of the Invention

[0005] The purpose of this invention is to provide a single-roll driven rolling mill apparatus and rolling method, which aims to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a single-roll driven rolling mill device, comprising:

[0007] Support platform;

[0008] The lower working roller is mounted on the support platform;

[0009] An upper working roll is disposed on the support platform, and the upper working roll and the lower working roll are vertically aligned so that a roll gap is formed between the upper working roll and the lower working roll.

[0010] The drive unit has its output end connected to the lower working roller;

[0011] The hydraulic accumulator has a commutator connected to its output end, and the commutator is connected to a hydraulic motor. The output end of the hydraulic motor is connected to the lower working roller.

[0012] Optionally, it also includes a lower bearing housing, which is disposed on the support platform. A lower support roller is disposed on the lower bearing housing and is connected to the lower working roller.

[0013] Optionally, it also includes an upper bearing housing, which is disposed on the support platform. An upper support roller is disposed on the upper bearing housing and is connected to the upper working roller.

[0014] Optionally, a threaded pair is also included, disposed on the support platform, and the threaded pair is connected to the upper bearing housing.

[0015] Optionally, an oil tank may also be included, which is connected to the hydraulic accumulator.

[0016] Optionally, an overflow valve is provided between the oil tank and the hydraulic accumulator.

[0017] Optionally, a pressure sensor may also be included, connected to the upper working roller.

[0018] Optionally, the driving component is a servo motor.

[0019] Optionally, the reversing component is a two-position four-way reversing valve.

[0020] The present invention also provides a single-roll driven rolling method, comprising the following steps:

[0021] Step 1: Drive the lower working roller to rotate through the drive component. At the same time, hydraulic oil is input into the hydraulic motor through the hydraulic accumulator, so that the hydraulic motor drives the upper working roller to rotate.

[0022] Step 2: After the upper work roll and the lower work roll bite the workpiece into the roll gap, the hydraulic oil flow direction is adjusted by the reversing component, and the workpiece drives the upper work roll to rotate, so that the upper work roll drives the hydraulic motor to rotate, so that the hydraulic oil in the hydraulic motor flows back to the hydraulic accumulator.

[0023] Step 3: After the workpiece is rolled out of the roll gap, hydraulic oil is input into the hydraulic motor through the hydraulic accumulator, so that the hydraulic motor drives the upper work roll to rotate in the opposite direction. At the same time, the lower work roll is driven to rotate in the opposite direction through the drive component, so that the workpiece is bitten into the roll gap in the opposite direction.

[0024] Step four, repeat steps two and three.

[0025] The present invention discloses the following technical effects:

[0026] When the workpiece is bitten into the roll gap, the lower work roll is driven to rotate by the drive component, and the lower work roll is used as the active roll. At the same time, the hydraulic motor is driven by the hydraulic accumulator to rotate the upper work roll, and the upper work roll is used as the auxiliary roll. Thus, the upper work roll assists the workpiece in biting in, which solves the problem that the upper and lower work rolls cannot rotate at the same time and bite in the medium and heavy plate rolling mill when the single roll drive is due to the existence of the roll gap.

[0027] When the workpiece is bitten into the roll gap and undergoes stable rolling, the reversing component changes the direction of hydraulic oil flow. The upper work roll loses the driving force of the hydraulic motor. Conversely, the workpiece drives the upper work roll to rotate, which in turn drives the hydraulic motor to rotate, causing the hydraulic oil to flow back to the hydraulic accumulator. This allows the hydraulic accumulator to store the rotational energy of the upper work roll, which is equivalent to adding a huge damping force to the upper work roll. At this time, in order to generate sufficient friction and shear force between the workpiece and the upper and lower work rolls, the "peak-cutting" effect of the unit pressure distribution of rolling is increased, the rolling deformation energy is reduced, and thus the energy consumption of medium and heavy plate rolling is reduced. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0030] In the diagram: 1. Support platform; 2. Lower work roll; 3. Upper work roll; 4. Roll gap; 5. Drive component; 6. Hydraulic accumulator; 7. Reversing component; 8. Hydraulic motor; 9. Lower bearing housing; 10. Lower support roll; 11. Upper bearing housing; 12. Upper support roll; 13. Oil tank; 14. Overflow valve; 15. Pressure sensor; 16. Rolled workpiece; 17. Threaded pair. Detailed Implementation

[0031] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figure 1 The present invention provides a single-roll driven rolling mill apparatus, comprising:

[0034] Supporting Platform 1;

[0035] The lower working roller 2 is mounted on the support platform 1;

[0036] The upper working roller 3 is set on the support platform 1, and the upper working roller 3 and the lower working roller 2 are vertically aligned so that a roller gap 4 is formed between the upper working roller 3 and the lower working roller 2.

[0037] The drive unit 5 has its output end connected to the lower working roller 2;

[0038] The hydraulic accumulator 6 has a reversing component 7 connected to its output end. The reversing component 7 is connected to a hydraulic motor 8, and the output end of the hydraulic motor 8 is connected to the lower working roller 2.

[0039] When the workpiece 16 is bitten into the roll gap 4, the lower work roll 2 is driven to rotate by the drive component 5, and the lower work roll 2 is used as the active roll. At the same time, the hydraulic accumulator 6 drives the hydraulic motor 8 to rotate the upper work roll 3, and the upper work roll 3 is used as the auxiliary roll. Thus, the upper work roll 3 assists the workpiece 16 in biting into the roll, which solves the problem that the upper work roll 3 and the lower work roll 2 cannot be rotated at the same time and bit into the roll when the medium and heavy plate rolling mill is driven by a single roll due to the existence of the roll gap.

[0040] When the workpiece 16 is bitten into the roll gap 4 and is subjected to stable rolling, the reversing component 7 reverses the flow of hydraulic oil. The upper work roll 3 loses the driving force of the hydraulic motor 8. Conversely, the workpiece 16 drives the upper work roll 3 to rotate, and the upper work roll 3 drives the hydraulic motor 8 to rotate, causing the hydraulic oil to flow back to the hydraulic accumulator 6. This allows the hydraulic accumulator 6 to store the rotational energy of the upper work roll 3, which is equivalent to adding a huge damping to the upper work roll 3. At this time, in order to generate sufficient friction and shear force between the workpiece 16 and the upper work roll 3 and the lower work roll 2, the "peak-cutting" effect of the unit pressure distribution of rolling is increased, the rolling deformation energy is reduced, and thus the energy consumption of medium and heavy plate rolling is reduced.

[0041] Further optimization of the scheme also includes a lower bearing seat 9, which is set on the support platform 1. A lower support roller 10 is set on the lower bearing seat 9, and the lower support roller 10 is connected to the lower working roller 2.

[0042] Further optimization of the scheme also includes an upper bearing seat 11, which is set on the support platform 1. An upper support roller 12 is set on the upper bearing seat 11, and the upper support roller 12 is connected to the upper working roller 3.

[0043] Furthermore, the lower support roller 10 and the lower working roller 2, as well as the upper support roller 12 and the upper working roller 3, are specifically connected by pressing.

[0044] Further optimization of the scheme also includes a threaded pair 17, which is set on the support platform 1 and connected to the upper bearing seat 11.

[0045] The position of the upper bearing seat 11 is adjusted by adjusting the threaded pair 17, thereby adjusting the thickness of the roll gap 4 between the upper working roll 3 and the lower working roll 2.

[0046] Further optimization of the scheme also includes an oil tank 13, which is connected to the hydraulic accumulator 6 and is used to supply hydraulic oil to the hydraulic accumulator 6.

[0047] To further optimize the design, an overflow valve 14 is installed between the oil tank 13 and the hydraulic accumulator 6. When the pressure of the hydraulic accumulator 6 is greater than the preset pressure of the overflow valve 14, the hydraulic oil flows back to the oil tank 13 through the overflow valve 14.

[0048] Further optimization of the scheme also includes a pressure sensor 15, which is connected to the upper work roll 3 to sense the pressure on the upper work roll 3 in order to drive the state of the workpiece 16, thereby facilitating the control of the reversing component 7.

[0049] The design was further optimized, and the driving component 5 was changed to a servo motor.

[0050] The design was further optimized, and the reversing component 7 was changed to a two-position four-way reversing valve.

[0051] The present invention also provides a single-roll driven rolling method, comprising the following steps:

[0052] Step 1: Drive the lower working roll 2 to rotate through the drive component 5. At the same time, the hydraulic accumulator 6 stores hydraulic oil in advance. Adjust the threaded pair 17 to drive the upper working roll 3 to move up and down to pre-adjust the roll gap 4. The hydraulic accumulator 6 inputs the hydraulic oil into the hydraulic motor 8 so that the hydraulic motor 8 drives the upper working roll 3 to rotate, so that the rolled piece 16 is bitten into the roll gap 4.

[0053] Step 2: After the upper working roll 3 and the lower working roll 2 bite the workpiece 16 into the roll gap 4, the pressure sensor 15 senses the upward surge signal of the rolling force and transmits it to the reversing component 7 for reversal. The reversing component 7 adjusts the flow direction of the hydraulic oil. At this time, the lower working roll 2 drives the workpiece 16, and the workpiece 16 drives the upper working roll 3 to rotate, so that the upper working roll 3 drives the hydraulic motor 8 to rotate, so that the hydraulic oil in the hydraulic motor 8 flows back to the hydraulic accumulator 6.

[0054] Step 3: After the workpiece 16 is rolled and ejected from the roll gap 4, the upper work roll 3 continues to rotate and decelerate under inertia, and the hydraulic motor 8 continues to press the hydraulic oil back to the hydraulic accumulator 6. When the speed of the upper work roll 3 decreases to zero, the hydraulic accumulator 6 releases the hydraulic oil and inputs it into the hydraulic motor 8, so that the hydraulic motor 8 drives the upper work roll 3 to rotate in the opposite direction. At the same time, the drive component 5 drives the lower work roll 2 to rotate in the opposite direction, and the threaded pair 17 adjusts the preset roll gap so that the workpiece 16 is bitten into the roll gap 4 in the opposite direction for rolling.

[0055] Furthermore, when the workpiece 16 is bitten into the roll gap 4 in the reverse direction, the pressure sensor 15 transmits the rolling force surge signal to the reversing member 7, and the reversing member 7 reverses direction; at this time, the lower work roll 2 drives the workpiece 16, and the workpiece 16 drives the hydraulic motor 8 to continue to reverse, pressing hydraulic oil into the hydraulic accumulator 6. When the workpiece 16 completes the reverse rolling and is thrown out of the roll gap 4, the upper work roll 3 continues to rotate in the reverse direction and decelerates under the action of inertia, and the hydraulic motor 8 continues to press the hydraulic oil back into the hydraulic accumulator 6; when the speed of the upper work roll 3 decreases to zero, the hydraulic accumulator 6 releases hydraulic oil, pushing the hydraulic motor 8 to rotate, so that the upper work roll 3 rotates.

[0056] Step four: Repeat steps two and three in this way to achieve single-roll driven rolling.

[0057] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0058] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A single-roll driven rolling method, using a single-roll driven rolling mill apparatus, characterized in that, The rolling mill equipment includes: Support platform (1); The lower working roller (2) is mounted on the support platform (1); The upper working roller (3) is set on the support platform (1). The upper working roller (3) and the lower working roller (2) are vertically aligned so that a roller gap (4) is formed between the upper working roller (3) and the lower working roller (2). The drive unit (5) has its output end connected to the lower working roller (2); The hydraulic accumulator (6) has a commutator (7) connected to its output end. The commutator (7) is connected to a hydraulic motor (8), and the output end of the hydraulic motor (8) is connected to the upper working roller (3). The rolling method includes the following steps: Step 1: Drive the lower working roller (2) to rotate through the drive unit (5), and at the same time, input hydraulic oil into the hydraulic motor (8) through the hydraulic accumulator (6) so that the hydraulic motor (8) drives the upper working roller (3) to rotate. Step 2: After the upper working roll (3) and the lower working roll (2) bite the workpiece (16) into the roll gap (4), the hydraulic oil flow direction is adjusted by the reversing component (7), and the workpiece (16) drives the upper working roll (3) to rotate, so that the upper working roll (3) drives the hydraulic motor (8) to rotate, so that the hydraulic oil in the hydraulic motor (8) flows back to the hydraulic accumulator (6); Step 3: After the rolled piece (16) is rolled out of the roll gap (4), hydraulic oil is input into the hydraulic motor (8) through the hydraulic accumulator (6) so that the hydraulic motor (8) drives the upper working roll (3) to rotate in the opposite direction. At the same time, the lower working roll (2) is driven to rotate in the opposite direction through the drive member (5) so that the rolled piece (16) is bitten into the roll gap (4) in the opposite direction. Step four, repeat steps two and three.

2. The single-roll driven rolling method according to claim 1, characterized in that: It also includes a lower bearing seat (9), which is disposed on the support platform (1). A lower support roller (10) is disposed on the lower bearing seat (9), and the lower support roller (10) is connected to the lower working roller (2).

3. The single-roll driven rolling method according to claim 1, characterized in that: It also includes an upper bearing seat (11), which is disposed on the support platform (1). An upper support roller (12) is disposed on the upper bearing seat (11), and the upper support roller (12) is connected to the upper working roller (3).

4. The single-roll driven rolling method according to claim 3, characterized in that: It also includes a threaded pair (17) disposed on the support platform (1), and the threaded pair (17) is connected to the upper bearing seat (11).

5. The single-roll driven rolling method according to claim 1, characterized in that: It also includes an oil tank (13) connected to the hydraulic accumulator (6).

6. A single-roll driven rolling method according to claim 5, characterized in that: An overflow valve (14) is provided between the oil tank (13) and the hydraulic accumulator (6).

7. The single-roll driven rolling method according to claim 1, characterized in that: It also includes a pressure sensor (15) connected to the upper working roller (3).

8. The single-roll driven rolling method according to claim 1, characterized in that: The driving component (5) is a servo motor.

9. A single-roll driven rolling method according to claim 1, characterized in that: The reversing component (7) is a two-position four-way reversing valve.

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