An assel roll feed angle adjusting mechanism

Abstract

The application belongs to the field of roll feed angle adjusting mechanism, in particular to an Assel roll feed angle adjusting mechanism, which comprises a rotating drum, a balance hydraulic cylinder and an adjusting assembly, the rotating drum is rotationally arranged on a rack, the side surface of the rotating drum is fixedly connected with a lever, and the end of the lever is connected with a support column; the cylinder body of the balance hydraulic cylinder is fixedly connected with one side of the rack; the piston rod of the balance hydraulic cylinder is in contact with the support column; the adjusting assembly is arranged on the other side of the rack, the adjusting assembly comprises a linear movement mechanism and a moving inclined block; the upper surface of the moving inclined block is an inclined surface and is in contact with the support column; the moving inclined block is slidingly connected with the rack; the linear movement mechanism is arranged on the rack and drives the moving inclined block to move. The force transmission chain is formed by adding the moving inclined block and the support column, the rolling force and the balance hydraulic cylinder pressure are converted into horizontal components by the inclined surface of the inclined block, and the rack directly bears the horizontal components. The lead screw only bears the driving force parallel to the axis, and the eccentric load moment is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of roll feed angle adjustment mechanism, and particularly relates to an Assel roll feed angle adjustment mechanism. BACKGROUND

[0002] As core equipment for producing high-precision seamless steel pipes, an Assel pipe mill directly affects the wall thickness uniformity and surface quality of the steel pipe by adjusting the roll feed angle (i.e. the included angle between the roll axis and the rolling line) through drum rotation.

[0003] In the prior art, a contrast document 1 (CN 202061878 U) proposes a drum adjustment device, which directly drives the drum rotation by using a screw rod lifting mechanism and is locked and fixed by a hydraulic cylinder. However, the structure has significant defects in the actual application of the Assel pipe mill:

[0004] Screw rod eccentric load damage problem: the out shaft (screw rod) lower end of the screw rod lifting machine directly contacts the drum. During the rolling process, the force applied by the drum to the screw rod is not coincident with the screw rod axis, forming an eccentric load torque. This non-axial load causes local stress concentration of the screw rod thread, and long-term operation causes wear and deformation or even breakage, resulting in increased transmission gap and deteriorated adjustment accuracy.

[0005] Mechanical wear cumulative error: the contact surface of the drum and the screw rod is worn due to adjustment, resulting in deviation between the actual displacement and the encoder reading. Although a position controller is set, mechanical wear cannot be compensated, and the feed angle adjustment error accumulates with the use time. SUMMARY

[0006] In view of the above technical problems, the application provides an Assel roll feed angle adjustment mechanism, which aims to solve the problems of easy damage of the existing drum device due to the eccentric load borne by the screw rod and angle misalignment caused by mechanical wear, and improve long-term operation reliability.

[0007] In order to solve the above technical problems, the technical scheme adopted by the application is as follows:

[0008] An Assel roll feed angle adjustment mechanism, comprising a drum, a balance hydraulic cylinder and an adjustment assembly, the drum is rotationally arranged on a rack, the side surface of the drum is fixedly connected with a lever, and the end of the lever is connected with a support column;

[0009] The cylinder body of the balance hydraulic cylinder is fixedly connected to one side of the rack; the piston rod of the balance hydraulic cylinder is in contact with the support column; the adjustment assembly is arranged on the other side of the rack, and the adjustment assembly comprises a linear movement mechanism and a moving inclined block; the upper surface of the moving inclined block is an inclined surface and is in contact with the support column;

[0010] The movable inclined block is slidably connected to the frame; the linear motion mechanism is mounted on the frame and drives the movable inclined block to move; the movable inclined block is provided with an adjustment hole, an adjustment column is slidably connected in the adjustment hole, and an adjustment ring is provided in the adjustment hole to support the adjustment column.

[0011] A support ring is fixed at the bottom of the adjustment hole, and the adjustment ring is slidably connected to the support ring. An adjustment cavity is provided between the adjustment ring and the support ring. A first channel communicating with the adjustment cavity is provided on the moving inclined block.

[0012] A pushing cavity is provided between the adjusting column and the adjusting hole; the moving inclined block is provided with a second channel communicating with the pushing cavity.

[0013] The linear motion mechanism is a screw jack.

[0014] It also includes a fixed limiting mechanism; the fixed limiting mechanism includes a support base and a limiting base; the support base is slidably connected to the frame, and a lifting mechanism is provided between the support base and the frame; the limiting base is slidably connected to the support base, and the limiting base and the support base are fixed by bolts; a limiting post is fixedly connected to the limiting base; the upper end of the support post is provided with a limiting hole that cooperates with the limiting post.

[0015] The limiting post is shaped like a frustum of a cone.

[0016] A fixing plate is fixedly connected to the frame; the fixing plate is located below the support column; the fixing plate is provided with a movable plate that contacts the lower end of the support column.

[0017] The movable plate is slidably connected to the fixed plate; a push column is fixedly connected to the movable plate, and a connecting hole is provided on the fixed plate that is slidably connected to the push column; a support cavity is provided between the push column and the connecting hole.

[0018] It also includes a single-acting cylinder, the cylinder body of which is connected to the support cavity via a pipeline; the cylinder body of the single-acting cylinder contains hydraulic oil; a spring is provided between the piston rod of the single-acting cylinder and its cylinder body; and a pressure plate that cooperates with the piston rod is provided on the support seat.

[0019] The piston rod end of the single-acting cylinder is threadedly connected to an adjusting sleeve; the spring is sleeved outside the piston rod. The two ends of the spring abut against the adjusting sleeve and the cylinder body, respectively.

[0020] Compared with the prior art, the beneficial effects of this invention are:

[0021] By adding a moving inclined block and a support column to form a force transmission chain, the rolling force and the pressure of the balancing hydraulic cylinder are converted into a horizontal component force through the inclined surface of the inclined block, which is directly borne by the frame. The lead screw only bears the driving force parallel to its axis, avoiding off-center load torque, significantly extending the lead screw life and maintaining transmission accuracy.

[0022] The design of the adjusting column and adjusting ring allows for adjustment of their extension height by injecting hydraulic oil, compensating for wear on the contact surface between the moving wedge and the support column.

[0023] By injecting oil into the push chamber to provide instantaneous additional thrust, the problem of excessive drum starting resistance is solved, and the peak load of the lead screw is reduced.

[0024] For commonly used angles, a limit pin-limit hole mechanical locking method is used to completely release the long-term stress state of the lead screw and hydraulic cylinder, avoiding fatigue damage.

[0025] When the support seat descends, the single-acting cylinder is linked to automatically push the moving plate to tighten the support column, forming a two-way constraint from top to bottom, which enhances the locking rigidity of the drum.

[0026] The adjusting sleeve can be finely adjusted to ensure that when the support seat moves down and the limiting post extends into the limiting hole, the moving plate is also in a state of applying pressure to the support post. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0028] Figure 2 This is a top view of Embodiment 1 of the present invention;

[0029] Figure 3 This is a cross-sectional view of Embodiment 1 of the present invention;

[0030] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0031] Figure 5 This is a schematic diagram of the structure of the adjustment component in Embodiment 1 of the present invention;

[0032] Figure 6 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention;

[0033] Figure 7 This is a side view of Embodiment 2 of the present invention;

[0034] Figure 8 This is a cross-sectional view of Embodiment 2 of the present invention;

[0035] Figure 9 yes Figure 8 A magnified view of a section at point B in the middle;

[0036] Figure 10 This is a partial cross-sectional view of the single-acting cylinder in Embodiment 2 of the present invention;

[0037] in:

[0038] 1 is the frame, 2 is the drum, and 3 is the balancing hydraulic cylinder.

[0039] 4 is the adjustment component, 40 is the linear motion mechanism, 41 is the moving inclined block, 42 ​​is the adjustment hole, 43 is the adjustment column, 44 is the adjustment ring, 45 is the support ring, 46 is the adjustment cavity, 47 is the first channel, 48 is the pushing cavity, and 49 is the second channel.

[0040] 5 is the lever, and 6 is the support column.

[0041] 7 is a fixed limiting mechanism, 70 is a support base, 71 is a limiting seat, 72 is a lifting mechanism, 73 is a limiting post, and 74 is a limiting hole.

[0042] 8 is the fixed plate, 80 is the connecting hole, 9 is the moving plate, 90 is the pushing column, and 91 is the supporting cavity.

[0043] 10 is a single-acting cylinder, 11 is a spring, 12 is a pressure plate, and 13 is an adjusting sleeve. Detailed Implementation

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] Example 1

[0046] like Figures 1 to 5 As shown, an Assel roll feed angle adjustment mechanism includes a drum 2, a balancing hydraulic cylinder 3, and an adjustment assembly 4. The drum 2 is rotatably mounted on a frame 1 (partial structure of the frame 1 is shown in the figure), and the roll is mounted on the drum 2. The Assel roll feed angle is adjusted by rotating the drum 2.

[0047] A lever 5 is fixedly connected to the side of the drum 2, and a support column 6 is connected to the end of the lever 5. When the support column 6 is subjected to external force, it drives the drum 2 to rotate, thereby changing the feed angle of the Assel roll. The support column 6 is specifically cylindrical.

[0048] The cylinder body of the balancing hydraulic cylinder 3 is fixedly connected to one side of the frame 1; the piston rod of the balancing hydraulic cylinder 3 contacts the support column 6. The adjustment assembly 4 is located on the other side of the frame 1, and the adjustment assembly 4 includes a linear movement mechanism 40 and a moving inclined block 41; the upper surface of the moving inclined block 41 is inclined and contacts the support column 6. The moving inclined block 41 is slidably connected to the frame 1; the linear movement mechanism 40 is located on the frame 1.

[0049] The linear motion mechanism 40 drives the moving inclined block 41 to move, and the inclined surface of the moving inclined block 41 contacts the support column 6, thereby pushing the drum 2 to rotate. When the drum 2 rotates to the required angle, the piston rod of the balancing hydraulic cylinder 3 extends and contacts the support column 6, which can fix the drum 2.

[0050] That is, by moving the horizontal movement of the inclined block 41 and changing the extension and retraction position of the piston rod of the balancing hydraulic cylinder 3, the drum 2 is rotated to different rotation angles.

[0051] With the above structural design, the pressure applied by the balancing hydraulic cylinder 3 and the drum 2 during production will act directly on the moving inclined block 41, rather than on the linear movement mechanism 40; moreover, the component force it generates on the linear movement mechanism 40 is parallel to the linear movement mechanism 40. Therefore, the above structural design can effectively protect the linear movement mechanism 40, preventing it from being damaged or experiencing gaps due to prolonged eccentric loading, which could lead to significant movement errors.

[0052] After prolonged operation, wear will occur at the contact points between the moving inclined block 41 and the support column 6. This results in a difference in the angle of the drum 2 between its unworn and worn state, even when the moving inclined block 41 travels the same distance; consequently, adjustment deviations will occur.

[0053] An adjustment hole 42 is provided on the movable inclined block 41, and an adjustment column 43 (with a seal at the sliding connection) is slidably connected inside the adjustment hole 42. An adjustment ring 44 is provided inside the adjustment hole 42, which supports the adjustment column 43. The upper surface of the adjustment column 43 is also inclined and parallel to the inclined surface of the movable inclined block 41. By changing the position of the adjustment ring 44, the extension height of the adjustment column 43 can be changed. When wear occurs, the adjustment column 43 extends out to replace the movable inclined block 41 in contact with the support column 6, thereby compensating for the wear height of the movable inclined block 41.

[0054] The shape of the adjusting column 43 can be set according to the actual situation. When a cylindrical shape is used, a guide groove or other structure is required to restrict the adjusting column 43 to move only axially and not rotate.

[0055] Furthermore, a support ring 45 is fixed at the bottom inside the adjusting hole 42, and the adjusting ring 44 is slidably connected to the support ring 45 (a seal is provided at the sliding connection). The adjusting ring 44 and the support ring 45 have an adjusting cavity 46. The moving inclined block 41 is provided with a first channel 47 communicating with the adjusting cavity 46. Hydraulic oil is introduced into the adjusting cavity 46 through the first channel 47. As the hydraulic oil is injected, the height of the adjusting ring 44 changes, causing the adjusting column 43 to extend. Specifically, the first channel 47 is connected to a pipe, and a hydraulic valve is provided on the pipe. The hydraulic oil enters the adjusting cavity 46 sequentially through the hydraulic valve, the pipe, and the first channel 47.

[0056] For example, when the moving wedge block 41 wears down, and the adjusted angle of the drum 2 is less than the required angle after movement, hydraulic oil is injected into the adjusting chamber 46 to extend the adjusting column 43 and continue to rotate the drum 2 to the required angle. Then, the corresponding hydraulic valve is closed. After a period of operation, the adjusting column 43 will also wear down; in this case, hydraulic oil is continuously injected to increase its extension length until the adjusting column 43 reaches its wear (movement) limit, at which point it is replaced. Specifically, the limit refers to the adjusting ring 44 moving to its upper limit position, ensuring that the adjusting ring 44 does not detach from the support ring 45.

[0057] Therefore, with the above structural design, the frequent replacement of the moving inclined block 41 can be eliminated; only the extension length of the adjusting column 43 needs to be changed to compensate for the height difference caused by wear and ensure the accuracy of the adjustment angle.

[0058] Furthermore, the adjusting column 43 and the adjusting hole 42 have a pushing chamber 48; the moving inclined block 41 is provided with a second channel 49 that communicates with the pushing chamber 48. The second channel 49 is also connected to a pipeline, and a valve is provided on the pipeline. Hydraulic oil enters the pushing chamber 48 in sequence through the valve, the pipeline, and the second channel 49.

[0059] When the resistance to the rotation of drum 2 from rest is too great, making it difficult to rotate solely by the linear motion mechanism 40, hydraulic oil can be injected into the push chamber 48 to move the adjusting column 43, thereby pushing drum 2 to rotate. That is, the above structure can apply additional thrust to overcome the initial resistance to the rotation of drum 2. After drum 2 rotates, the injection of hydraulic oil into the push chamber 48 stops; the moving wedge block 41 continues to move for angle adjustment; during this movement, the downward pressure applied by drum 2 drives the adjusting column 43 to reset, discharging the hydraulic oil.

[0060] Furthermore, the linear motion mechanism 40 is a screw jack. The base of the screw jack is fixedly connected to the frame 1, and the screw of the screw jack is fixedly connected to the moving inclined block 41.

[0061] Example 2

[0062] The structure in Example 1 is suitable for applications requiring relatively frequent angle changes. However, in most mass production scenarios, the roll feed angle is adjusted less frequently; typically, only a few angles are used.

[0063] like Figures 6 to 10 As shown, it also includes a fixed limiting mechanism 7; the fixed limiting mechanism 7 includes a support base 70 and a limiting base 71; the support base 70 is slidably connected to the frame 1, and a lifting mechanism 72 is provided between the support base 70 and the frame 1. The lifting mechanism 72 can specifically be a hydraulic cylinder, whose cylinder body is fixedly connected to the frame 1, and whose piston rod is fixedly connected to the support base 70; the lifting of the support base 70 is achieved by the extension and retraction of the piston rod.

[0064] The limiting seat 71 is slidably connected to the support seat 70, and the limiting seat 71 and the support seat 70 are fixed together by bolts. A limiting post 73 is fixedly connected to the limiting seat 71. The upper end of the support post 6 is provided with a limiting hole 74 that mates with the limiting post 73. Each fixed limiting mechanism 7 contains multiple limiting seats 71, and the position of the limiting post 73 on each limiting seat 71 is different. That is, each commonly used roll feed angle has a corresponding limiting seat 71. After replacing the corresponding limiting seat 71 as needed, the support seat 70 can be fixedly connected by bolts.

[0065] After the drum 2 is adjusted to the normal operating angle by the aforementioned balancing hydraulic cylinder 3 and adjusting assembly 4, the lifting mechanism 72 drives the support base 70, the limit base 71, and the limit post 73 thereon to extend into the limit hole 74, thereby fixing the position of the limit post 73 (drum 2).

[0066] Once the position of the limiting post 73 is fixed, the linear movement mechanism 40 and the balancing hydraulic cylinder 3 can move in opposite directions, creating a gap between them and the support post 6. In other words, this structural arrangement can replace the balancing hydraulic cylinder 3 and the adjustment assembly 4 in fixing the position of the support post 6, thereby preventing damage to the linear movement mechanism 40 and the balancing hydraulic cylinder 3 due to prolonged stress.

[0067] Furthermore, the limiting post 73 is shaped like a frustum cone; the limiting hole 74 has the same shape.

[0068] Furthermore, a fixing plate 8 is fixedly connected to the frame 1; the fixing plate 8 is located below the support column 6; the fixing plate 8 is provided with a movable plate 9 that contacts the lower end of the support column 6. When the limiting column 73 extends into the limiting hole 74, it contacts the lower end of the support column 6 through the movable plate 9, thereby causing both the upper and lower ends of the support column 6 to be subjected to force.

[0069] Furthermore, the movable plate 9 is slidably connected to the fixed plate 8; a push column 90 is fixedly connected to the movable plate 9, and the fixed plate 8 is provided with a connection hole 80 that is slidably connected to the push column 90 (a seal is provided at the sliding connection); there is a support cavity 91 between the push column 90 and the connection hole 80. By injecting hydraulic oil into the support cavity 91, the push column 90 and the movable plate 9 move upward to contact the support column 6 and apply pressure to the support column 6.

[0070] Furthermore, it also includes a single-acting cylinder 10, the cylinder body of which is connected to the support cavity 91 via a pipeline; the cylinder body of the single-acting cylinder 10 contains hydraulic oil; a spring 11 is provided between the piston rod of the single-acting cylinder 10 and its cylinder body, and the spring 11 is used to achieve reset. A pressure plate 12 that cooperates with the piston rod is provided on the support base 70.

[0071] During the downward movement of the support base 70 (when the limiting post 73 extends into the limiting hole 74), the pressure plate 12 gradually contacts the piston rod of the single-acting cylinder 10, pushing it to move and push the hydraulic oil in the cylinder into the support cavity 91, causing the pushing post 90 and the moving plate 9 to move upward. Therefore, through the above structural arrangement, the linkage between the support base 70 and the pushing post 90 can be realized.

[0072] When the support seat 70 moves upward, the elastic potential energy released by the spring 11 drives the piston rod to reset, and the gravity of the moving plate 9 is used to make the hydraulic oil in the support cavity 91 return to the cylinder body of the single-acting cylinder 10.

[0073] Furthermore, the piston rod end of the single-acting cylinder 10 is threadedly connected to an adjusting sleeve 13; a spring 11 is sleeved on the piston rod. The two ends of the spring 11 abut against the adjusting sleeve 13 and the cylinder body, respectively. The adjusting sleeve 13 can be rotated as needed to change its extension length; to ensure that when the support seat 70 moves down to allow the limiting post 73 to extend into the limiting hole 74, the moving plate 9 is also in a state of applying pressure to the support post 6.

[0074] The above description only illustrates preferred embodiments of the present invention, but the present invention is not limited to the above embodiments.

Claims

1. An Assel roll feed angle adjustment mechanism, characterized in that: It includes a rotating drum (2), a balancing hydraulic cylinder (3) and an adjustment assembly (4). The rotating drum (2) is rotatably mounted on the frame (1). A lever (5) is fixedly connected to the side of the rotating drum (2), and a support column (6) is connected to the end of the lever (5). The cylinder body of the balancing hydraulic cylinder (3) is fixedly connected to one side of the frame (1); the piston rod of the balancing hydraulic cylinder (3) is in contact with the support column (6); the adjustment assembly (4) is set on the other side of the frame (1), and the adjustment assembly (4) includes a linear movement mechanism (40) and a moving inclined block (41); the upper surface of the moving inclined block (41) is an inclined surface and is in contact with the support column (6); The movable inclined block (41) is slidably connected to the frame (1); the linear moving mechanism (40) is set on the frame (1), and the movable inclined block (41) is driven to move by the linear moving mechanism (40); the movable inclined block (41) is provided with an adjustment hole (42), an adjustment column (43) is slidably connected in the adjustment hole (42), and an adjustment ring (44) is provided in the adjustment hole (42), and the adjustment column (43) is supported by the adjustment ring (44); A support ring (45) is fixed at the bottom of the adjustment hole (42). The adjustment ring (44) and the support ring (45) are slidably connected. An adjustment cavity (46) is provided between the adjustment ring (44) and the support ring (45). A first channel (47) communicating with the adjustment cavity (46) is provided on the moving inclined block (41).

2. The Assel roll feed angle adjustment mechanism according to claim 1, characterized in that: A pushing cavity (48) is provided between the adjusting column (43) and the adjusting hole (42); a second channel (49) communicating with the pushing cavity (48) is provided on the moving inclined block (41).

3. The Assel roll feed angle adjustment mechanism according to claim 1, characterized in that: The linear motion mechanism (40) is a screw jack.

4. The Assel roll feed angle adjustment mechanism according to claim 1, characterized in that: It also includes a fixed limiting mechanism (7); the fixed limiting mechanism (7) includes a support base (70) and a limiting base (71); the support base (70) is slidably connected to the frame (1), and a lifting mechanism (72) is provided between the support base (70) and the frame (1); the limiting base (71) is slidably connected to the support base (70), and the limiting base (71) and the support base (70) are fixed together by bolts; a limiting post (73) is fixedly connected to the limiting base (71); the upper end of the support post (6) is provided with a limiting hole (74) that cooperates with the limiting post (73).

5. The Assel roll feed angle adjustment mechanism according to claim 4, characterized in that: The limiting post (73) is shaped like a frustum of a cone.

6. The Assel roll feed angle adjustment mechanism according to claim 4, characterized in that: A fixing plate (8) is fixedly connected to the frame (1); the fixing plate (8) is located below the support column (6); the fixing plate (8) is provided with a movable plate (9) that contacts the lower end of the support column (6).

7. The Assel roll feed angle adjustment mechanism according to claim 6, characterized in that: The movable plate (9) is slidably connected to the fixed plate (8); a push column (90) is fixedly connected to the movable plate (9), and a connecting hole (80) is provided on the fixed plate (8) that is slidably connected to the push column (90); a support cavity (91) is provided between the push column (90) and the connecting hole (80).

8. The Assel roll feed angle adjustment mechanism according to claim 7, characterized in that: It also includes a single-acting cylinder (10), the cylinder body of which is connected to the support cavity (91) via a pipeline; the cylinder body of the single-acting cylinder (10) contains hydraulic oil; a spring (11) is provided between the piston rod of the single-acting cylinder (10) and its cylinder body; and a pressure plate (12) that cooperates with the piston rod is provided on the support seat (70).

9. The Assel roll feed angle adjustment mechanism according to claim 8, characterized in that: The piston rod end of the single-acting cylinder (10) is threaded with an adjusting sleeve (13); the spring (11) is sleeved on the outside of the piston rod; the two ends of the spring (11) abut against the adjusting sleeve (13) and the cylinder body respectively.

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