A squeezer roll device for a cold rolling mill

Abstract

The utility model relates to the technical field of cold rolling mill's head roller device, specifically disclose a cold rolling mill is with head roller device, is equipped with the unwinding reduction gearbox on the cold rolling mill, is installed with the reel on the unwinding reduction gearbox, head roller device is installed in one side of unwinding reduction gearbox, head roller device includes support frame, two first fixed frame, second fixed frame, rotating shaft, head roller and oil cylinder, support frame is fixed in one side of unwinding reduction gearbox, two first fixed frame and second fixed frame are fixed in the upper portion and lower portion of support frame outside respectively, rotating shaft is arranged in two first fixed frame, and its one end near reel passes through first fixed frame and extends, head roller is installed on rotating shaft through two turnover arms. The head roller device of the utility model can carry out inductive control when the coiled material reaches the preset critical size, and triggers the starting control unit to make the head roller reset, so that the system matched with the cold rolling mill can enter the stable continuous rolling or coiling stage.

Description

Technical Field

[0001] This utility model belongs to the technical field of head roll device for cold rolling mills, specifically a head roll device for cold rolling mills. Background Technology

[0002] The roll-off mechanism is mainly used in the critical stage before the cold rolling mill starts to roll the sheet. Its core function is to effectively press the end of the coil (commonly known as "roll-off") to prevent the coil from becoming loose, warped at the end, or misaligned between layers (commonly known as "loose coil") due to the lack of tension in the initial stage of winding, which would otherwise make it impossible to ensure the stable progress of the subsequent rolling or winding process. Furthermore, in actual operation, existing cold rolling mills need to press the coil on the drum. As the diameter of the coil continues to increase, the head roll pressing on the coil will deflect at an angle. However, existing head rolls cannot provide a timely signal to the drive unit for retraction when the angle deflection occurs, which will cause certain damage to the drive unit in the long run. Therefore, there is an urgent need to design a head roll device for cold rolling mills. Summary of the Invention

[0003] The purpose of this invention is to provide a head roll device for cold rolling mills, which solves the problem that the existing head roll mechanism cannot retract the drive component in time when the head roll deflects at an angle, which will cause certain damage to the drive component in the long run.

[0004] To solve the above-mentioned technical problems, this utility model provides a head roll device for a cold rolling mill. The cold rolling mill is equipped with an uncoiling reduction gearbox, on which a coil is mounted. The head roll device is installed on one side of the uncoiling reduction gearbox. The head roll device includes a support frame, two first fixed frames, a second fixed frame, a rotating shaft, a head roll, and a hydraulic cylinder. The support frame is fixed to one side of the uncoiling reduction gearbox. The two first fixed frames and the second fixed frames are respectively fixed to the upper and lower parts of the outer side of the support frame. The rotating shaft passes through the two first fixed frames, with its end near the coil extending out of the first fixed frame. The head roll is mounted on the rotating shaft via two tilting arms. One end of the hydraulic cylinder is hinged to the second fixed frame, and the other end is connected to the rotating shaft via a hinge frame. A limit switch is fixed to the first fixed frame near the drum via a third fixed frame. A sensing block is provided on the outer wall of the end of the hinge frame near the rotating shaft. The hydraulic cylinder extends to push the rotating shaft and the hinge frame to rotate, and at the same time drives the two flipping arms to rotate, so that the trowel roller presses down on the roll material on the drum. When the roll material is wound to its maximum diameter, the two flipping arms and the hinge frame are reversed by force, and the sensing block reverses to trigger the limit switch.

[0005] Furthermore, the output end of the hydraulic cylinder is threadedly connected to a connecting post.

[0006] Furthermore, the upper end of the hinge frame is an annular sleeve, and an anti-rotation key is embedded between the annular sleeve and the rotating shaft. The lower end of the hinge frame is provided with two parallel brackets. The upper ends of the two brackets are fixed to the side wall of the annular sleeve, and the lower ends are sleeved on the outside of the connecting column. The brackets and the connecting column are connected by a limiting shaft.

[0007] Furthermore, the lower part of the limit switch is obliquely connected to a sensing rod via a rotating shaft, and the upper end of the sensing block is provided with an inclined surface that contacts and cooperates with the sensing rod.

[0008] Furthermore, the upper part of the two first fixing frames is ring-shaped, and a limiting sleeve is provided between the upper part of each first fixing frame and the rotating shaft. The lower part is connected to the support frame by bolts. An oil groove is provided between the limiting sleeve and the first fixing frame. An oil cup is provided on the first fixing frame, and the oil cup is connected to the oil groove by an oil passage.

[0009] Furthermore, the limiting shaft is provided with a cross-shaped channel. One end of the cross-shaped channel passes through the left end face of the limiting shaft and is equipped with an oil cup. The upper and lower ends pass through the outer side wall of the limiting shaft, respectively. The cross-shaped channel is connected to the gap formed between the limiting shaft and the connecting column.

[0010] The beneficial effects of this utility model are as follows: The head roll device of this utility model can not only press the initial starting end of the coil (i.e., the coil head), but also assist in establishing the tension of the coil. By sensing and controlling the coil when it reaches the preset critical size, the start control unit is triggered to reset the head roll, thereby enabling the system of the cold rolling mill to enter a stable continuous rolling or coiling stage, so as to improve the rolling efficiency and coiling efficiency of the coil. The head roll device is designed so that the hydraulic cylinder drives the hinge frame and the rotating shaft to rotate. The rotation of the rotating shaft causes the tilting arm and the head roll mounted on the rotating shaft to rotate, so that the head roll can press the head of the roll material. When the unwinding gearbox drives the roll material to expand in diameter, the head roll continues to apply force to the roll material. The outer diameter of the roll material gradually increases, forcing the head roll and the tilting arm connected to it to deflect at an angle. The rotating shaft connected to the tilting arm also deflects at an angle. When the deflection of the rotating shaft causes the hinge frame connected to it to rotate to a preset critical size, the sensing block on the hinge frame triggers the limit switch. The limit switch sends a signal to the control unit, which controls the hydraulic cylinder to retract and smoothly reset the head roll. This effectively solves the problem that the existing head roll mechanism cannot retract the driving component in time when the head roll deflects at an angle, which will cause certain damage to the driving component in the long run. The anti-rotation key embedded between the annular sleeve at the upper end of the hinge frame and the rotating shaft allows the hinge frame to rotate with the rotating shaft, thus preventing slippage between the annular sleeve at the upper end of the hinge frame and the rotating shaft. The cross-shaped channel inside the limit shaft allows lubricating oil to be added through an oil cup, and the lubricating oil flows between the limit shaft and the connecting column, thereby reducing friction between the limit shaft and the connecting column and improving their service life. Attached Figure Description

[0011] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a front view of the head roll device for a cold rolling mill according to this utility model; Figure 2 This is a left view of the head roll device for a cold rolling mill according to this utility model; Figure 3 This is a cross-sectional view (AA) of the head roll portion of the head roll device for a cold rolling mill according to this utility model; Figure 4 yes Figure 2 BB section view in the middle; Figure 5 This is a partial fracture cross-sectional view of the first fixed frame of the cold rolling mill head roll device of this utility model; Figure 6 This is a partial fracture cross-sectional view of the second fixed frame of the cold rolling mill head roll device of this utility model; Figure 7This is a partial fracture diagram of the cold rolling mill head roll device of this utility model, which includes a limit switch and a sensing block; In the diagram: 1-Unwinding gearbox, 2-Roll drum, 3-Head roller device, 4-Limiting shaft, 5-Anti-rotation key, 30-Connecting column, 31-Support frame, 32-First fixed frame, 33-Second fixed frame, 34-Rotating shaft, 35-Head roller, 36-Hydraulic cylinder, 37-Tilting arm, 38-Hinged frame, 39-Limit switch, 40-Induction block, 41-Cross-shaped channel, 42-Limiting sleeve, 321-Oil cup, 322-Oil passage, 381-Annular sleeve, 382-Bracket, 391-Induction rod, 401-Inclined surface, 421-Oil trough. Detailed Implementation

[0013] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0014] In one specific embodiment of this utility model, such as Figure 1-7 As shown, a head roll device for a cold rolling mill is specifically disclosed. The cold rolling mill is equipped with an uncoiling reduction gearbox 1, on which a coil 2 is mounted. The head roll device 3 is installed on one side of the uncoiling reduction gearbox 1. The head roll device 3 includes a support frame 31, two first fixed frames 32, a second fixed frame 33, a rotating shaft 34, a head roll 35, and a hydraulic cylinder 36. The support frame 31 is fixed to one side of the uncoiling reduction gearbox 1. The two first fixed frames 32 and the second fixed frame 33 are respectively fixed to the upper and lower parts of the outer side of the support frame 31. The rotating shaft 34 passes through the two first fixed frames 32, and its end near the coil 2 passes through the first fixed frame 32 and extends out. The head roll 35 is mounted on the rotating shaft 34 through two flipping arms 37. One end of the hydraulic cylinder 36 is hinged to the second fixed frame 33, and the other end is connected to the rotating shaft 34 through the hinge frame 38. The output end of the hydraulic cylinder 36 is threadedly connected to the connecting post 30. A limit switch 39 is fixed to the first fixed frame 32 near the drum 2 via a third fixed frame. A sensing block 40 is provided on the outer wall of the hinge frame 38 near the rotating shaft 34. The hydraulic cylinder 36 extends to push the rotating shaft 34 and the hinge frame 38 to rotate, and at the same time drives the two flipping arms 37 to rotate, so that the head roller 35 presses down on the rolled material of the roll 2. When the rolled material is wound to the maximum diameter, the two flipping arms 37 and the hinge frame 38 are reversed by force, and the sensing block 40 reverses to trigger the limit switch 39. The crimping roller device 3 is configured such that the hydraulic cylinder 36 drives the hinge frame 38 and the rotating shaft 34 to rotate. The rotation of the rotating shaft 34 causes the tilting arm 37 and the crimping roller 35 mounted on it to rotate, allowing the crimping roller 35 to press the crimping head of the coil material. When the unwinding gearbox 1 drives the coil 2 to expand its diameter, the crimping roller 35 continues to apply force to the coil material. The gradual increase in the outer diameter of the coil forces the crimping roller 35, which is in close contact with the surface of the coil material, and the tilting arm 37 connected to it to deflect at an angle, thus affecting the tilting head. The rotating shaft 34 connected to the arm 37 also deflects at an angle. When the rotating shaft 34 deflects, it causes the hinge frame 38 connected to it to rotate to a preset critical size. The sensing block 40 on the hinge frame 38 then triggers the limit switch 39. The limit switch 39 sends a signal to the control unit, which controls the hydraulic cylinder 36 to retract and smoothly reset the head roller 35. This effectively solves the problem that the existing head roller mechanism cannot retract the drive component in time when the head roller deflects at an angle, which will cause certain damage to the drive component in the long run.

[0015] The upper end of the hinge frame 38 is an annular sleeve 381. An anti-rotation key 5 is embedded between the annular sleeve 381 and the rotating shaft 34. The lower end of the hinge frame 38 is provided with two parallel brackets 382. The upper ends of the two brackets 382 are fixed to the side wall of the annular sleeve 381, and the lower ends are sleeved on the outside of the connecting column 30. The brackets 382 and the connecting column 30 are connected by a limiting shaft 4. The anti-rotation key 5 embedded between the annular sleeve 381 at the upper end of the hinge frame 38 and the rotating shaft 34 allows the hinge frame 38 to rotate with the rotating shaft 34, thus preventing slippage between the annular sleeve 381 at the upper end of the hinge frame 38 and the rotating shaft 34.

[0016] The lower part of the limit switch 39 is obliquely connected to the sensing rod 391 via a rotating shaft, and the upper end of the sensing block 40 is provided with an inclined surface 401 that contacts and cooperates with the sensing rod 391.

[0017] The upper part of the two first fixing frames 32 is ring-shaped, and a limiting sleeve 42 is provided between the upper part of each first fixing frame 32 and the rotating shaft 34. The lower part is connected to the support frame 31 by bolts. An oil groove 421 is provided between the limiting sleeve 42 and the first fixing frame 32. An oil cup 321 is provided on the first fixing frame 32. The oil cup 321 and the oil groove 421 are connected by an oil passage 322.

[0018] The limiting shaft 4 is provided with a cross-shaped channel 41. One end of the cross-shaped channel 41 passes through the left end face of the limiting shaft 4 and is equipped with an oil cup 321. The upper and lower ends pass through the outer side wall of the limiting shaft 4 respectively. The cross-shaped channel 41 is connected to the gap formed between the limiting shaft 4 and the connecting column 30. The cross-shaped channel 41 inside the limiting shaft 4 allows lubricating oil to be added to the cross-shaped channel 41 inside the limiting shaft 4 through the oil cup 321, and the lubricating oil flows between the limiting shaft 4 and the connecting column 30, thereby reducing the friction between the limiting shaft 4 and the connecting column 30 and improving the service life of the limiting shaft 4 and the connecting column 30.

[0019] The head roll device 3 of this utility model can not only press the initial start end of the coil (i.e., the coil head), but also assist in establishing the tension of the coil. By sensing and controlling the coil when it reaches the preset critical size, the start control unit is triggered to reset the head roll 35, thereby enabling the system of the cold rolling mill to enter a stable continuous rolling or coiling stage, so as to improve the rolling efficiency and coiling efficiency of the coil.

[0020] The working process of this utility model is as follows: The roll head of the material is pulled onto the drum 2. The hydraulic cylinder 36 extends and pushes the lower part of the hinge frame 38 to move upward, which drives the rotating shaft 34 to rotate. The rotation of the rotating shaft 34 drives the two flipping arms 37 on it to rotate, so as to drive the head roller 35 to press down and hold the roll head of the material. Then, the unwinding gearbox 1 controls the drum 2 to perform a jogging operation, which drives the material to be slightly wound on the drum 2. After the winding is completed, the drum 2 is controlled to rotate to continue winding the material. The head roller 35 keeps pressing on the material and, with the rotation of the drum 2, helps to establish the tension of the material in each layer to avoid the problem of the material loosening. When the roll material reaches the preset critical size, the outer diameter of the roll material reaches its maximum diameter. The maximum diameter of the roll material forces the head roller and the flipping arm 37 connected to it to deflect at an angle. The rotating shaft 34 connected to the flipping arm 37 also deflects at an angle, and the flipping arm 37 rotates away from the roll 2. The rotating shaft 34 also rotates accordingly. At this time, the roll material can maintain its stable shape under its own tension, eliminating the risk of natural unwinding. At the same time, the hinge frame 38 and the sensing block 40 on it rotate with the rotating shaft 34. When the angle change reaches the trigger threshold, the inclined surface 401 on the sensing block 40 triggers the sensing rod 391 of the limit switch 39. The limit switch 39 sends a signal to the control unit, which controls the hydraulic cylinder 36 to retract and smoothly reset the head roller 35. This can effectively solve the problem that the existing head roller mechanism cannot retract the driving component in time when the head roller deflects at an angle, which will cause certain damage to the driving component in the long run.

[0021] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A head roll device for a cold rolling mill, wherein the cold rolling mill is provided with an uncoiling reduction gearbox (1), and a roll (2) is mounted on the uncoiling reduction gearbox (1), characterized in that, The head roller assembly (3) is installed on one side of the unwinding gearbox (1). The head roller assembly (3) includes a support frame (31), two first fixed frames (32), a second fixed frame (33), a rotating shaft (34), a head roller (35), and a hydraulic cylinder (36). The support frame (31) is fixed on one side of the unwinding gearbox (1). The two first fixed frames (32) and the second fixed frames (33) are respectively fixed to the upper and lower parts of the outside of the support frame (31). The rotating shaft (34) passes through the two first fixed frames (32), and its end near the drum (2) passes through the first fixed frame (32) and extends out. The head roller (35) is installed on the rotating shaft (34) by two flipping arms (37). One end of the hydraulic cylinder (36) is hinged to the second fixed frame (33), and the other end is connected to the rotating shaft (34) through a hinge frame (38). A limit switch (39) is fixed on the first fixed frame (32) near the drum (2) through a third fixed frame. A sensing block (40) is provided on the outer wall of the end of the hinge frame (38) near the rotating shaft (34). The hydraulic cylinder (36) extends to push the rotating shaft (34) and the hinge frame (38) to rotate, and at the same time drives the two flipping arms (37) to rotate, so that the trowel roller (35) presses down on the roll of material on the drum (2). When the roll reaches the maximum diameter, the two flipping arms (37) and the hinge frame (38) are reversed by force, and the sensing block (40) reverses to trigger the limit switch (39).

2. The head roll device for a cold rolling mill according to claim 1, characterized in that, The output end of the hydraulic cylinder (36) is threadedly connected to a connecting post (30).

3. The head roll device for a cold rolling mill according to claim 2, characterized in that, The upper end of the hinge frame (38) is an annular sleeve (381), and an anti-rotation key (5) is embedded between the annular sleeve (381) and the rotating shaft (34). The lower end of the hinge frame (38) is provided with two parallel brackets (382). The upper ends of the two brackets (382) are fixedly set with the annular sleeve (381), and the lower ends are sleeved on the outside of the connecting column (30). The brackets (382) and the connecting column (30) are connected by a limiting shaft (4).

4. The head roll device for a cold rolling mill according to claim 1, characterized in that, The lower part of the limit switch (39) is obliquely connected to a sensing rod (391) via a rotating shaft, and the upper end of the sensing block (40) is provided with an inclined surface (401) that contacts and cooperates with the sensing rod (391).

5. A head roll device for a cold rolling mill according to claim 1, characterized in that, The upper part of the two first fixing brackets (32) is ring-shaped, and a limiting sleeve (42) is provided between the upper part of each first fixing bracket (32) and the rotating shaft (34), and the lower part is connected to the support frame (31) by bolts. An oil groove (421) is provided between the limiting sleeve (42) and the first fixing bracket (32). An oil cup (321) is provided on the first fixing bracket (32), and the oil cup (321) and the oil groove (421) are connected by an oil passage (322).

6. The head roll device for a cold rolling mill according to claim 3, characterized in that, The limiting shaft (4) is provided with a cross-shaped channel (41). One end of the cross-shaped channel (41) passes through the left end face of the limiting shaft (4) and is equipped with an oil cup (321). The upper and lower ends pass through the outer side wall of the limiting shaft (4) respectively. The cross-shaped channel (41) is connected to the gap formed between the limiting shaft (4) and the connecting column (30).

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