Holding device for working roll of stainless steel cold-rolling mill

Abstract

The utility model belongs to the technical field of stainless steel plate strip cold rolling, and particularly relates to a holding device of a stainless steel cold rolling mill working roll, which comprises rotating shafts, bearing seats, holding claws, a top block and a driving device, the two ends of the two rotating shafts are fixed on the bearing seats at the two ends of a middle roll, and the top ends of the holding claws are connected to the two ends of the rotating shafts in a sliding mode. One end of each ejector block abuts against the outer side face of the corresponding holding claw, the other end of each ejector block is fixed to the corresponding driving device, the multiple driving devices are fixed in the main rack, and the end, making contact with the corresponding holding claw, of each ejector block is hemispherical. The holding device is simple in structure and balanced in load, the stress area is not changed all the time, friction force is reduced, it is guaranteed that the lifting position is not changed when the roller is held every time, and the working roller is prevented from falling off when the roller is held due to abrasion.

Description

Technical Field

[0001] The utility model belongs to the technical field of cold rolling of stainless steel plates and strips, in particular to a holding device for working rolls of a stainless steel cold rolling mill. Background Art

[0002] Cold-rolled stainless steel sheet and strip production often utilizes a multi-roll cold rolling mill. In this mill, the roll system is symmetrically distributed along a horizontal line, primarily consisting of support rolls, intermediate rolls, and work rolls. During the rolling process, the rolls are tightly aligned, with the support rolls providing the downward force, the intermediate rolls providing the drive to move the strip, and the work rolls contacting and squeezing the strip, causing it to deform and change its thickness and length. As the number of rolling passes increases, the strip's thickness gradually decreases, approaching the finished product's requirements. At this point, the work rolls need to be replaced for final rolling.

[0003] When replacing the working rolls, the roll system is loosened. Due to gravity, the working rolls press against the steel strip. Pulling them out directly will scratch the surface of the steel strip, causing defects and affecting the quality of the finished product. Therefore, a holding device is required to lift the working rolls a certain distance away from the steel strip surface before pulling them out. In addition, if the working rolls are lifted too high, they will squeeze the intermediate rolls upwards, scratching the surface of the intermediate rolls when pulling them out. When rolling thin materials, defects will be reflected on the surface of the steel strip, also affecting the quality of the finished product. Therefore, the stroke of the holding device must be controlled so that a certain gap is left above and below the working rolls when holding them to prevent scratches on the steel strip and intermediate rolls. Existing holding devices have the following problems:

[0004] (1) The top block has a flat surface. When the claws are pushed, the contact area will be reduced due to the tilt of the claws, resulting in uneven force, accelerated wear of the top block, and problems such as failure to hold the roller in place and roller falling off.

[0005] (2) The length of the top block does not match the drive device, resulting in a small gap between the working roll and the intermediate roll after the roll is held, or even direct contact, causing the intermediate roll to be scratched when the roll is pulled out. Utility Model Content

[0006] The utility model aims to provide a holding device for the working rolls of a stainless steel cold rolling mill, which solves the problems that the existing holding device has tilted claws that lead to poor holding, and the mismatch between the top block length and the drive device that leads to too small a gap between the working roll and the intermediate roll after holding the roll.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A holding device for the working rolls of a stainless steel cold rolling mill includes a rotating shaft, a bearing seat, a claw, a top block and a driving device. The two ends of the rotating shafts are fixed to the bearing seats at the two ends of the intermediate roll. The top ends of multiple claws are slidably connected to the two ends of the rotating shaft. One end of the top block presses against the outer side surface of the claw, and the other end is fixed to the driving device. Multiple driving devices are fixed in the main frame. The end of the top block that contacts the claw is hemispherical.

[0009] Preferably, the driving device, top block and gripping claws correspond to each other one by one and are symmetrically distributed on both sides of the working roll, so that the load is balanced and the movement is sensitive.

[0010] Preferably, the plurality of driving devices are controlled simultaneously by a single control device to ensure that the plurality of claws move in a coordinated manner and keep the working rolls level.

[0011] Preferably, the length of the top block head is strictly controlled at 25mm-28mm, and after the stroke is in place, the gap between the working roll and the intermediate roll, and the gap between the working roll and the steel strip reaches 10mm-15mm to prevent scratches.

[0012] Working principle: When replacing the working roll, the drive device extends and drives the top block to rotate the claw to a certain angle to hold the working roll. The replacement is completed. During normal rolling, the drive device retracts and responds quickly. After lifting the working roll, there is sufficient space above and below to prevent the steel strip and the intermediate roll from being scratched when changing the roll.

[0013] The beneficial effects achieved by the utility model are as follows:

[0014] (1) The holding device has a simple structure, balanced load, sensitive action, coordinated claw action, always keeping the roller level and preventing tipping; and has a compact structure and high space utilization;

[0015] (2) The contact end between the top block and the clamping claw adopts a hemispherical design to adapt to the tilting and rotation of the clamping claw. The force-bearing area remains unchanged, the force is evenly distributed, and the friction is reduced, which prevents the top block from wearing and extending its service life. It ensures that the lifting position remains unchanged each time the roll is clamped, and prevents the working roll from falling due to wear.

[0016] (3) Multiple drive devices are controlled simultaneously by a single control device, the stroke is controllable, and the length of the top block head is strictly controlled. After the stroke is in place, the gaps between the working roll, the intermediate roll, and the steel strip are moderate to prevent the steel strip and the intermediate roll surface from being scratched when the roll is pulled out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the top block structure of the utility model;

[0019] Figure 3This is a schematic diagram of the structure of the utility model when being held.

[0020] Explanation of the accompanying reference numerals: 1. rotating shaft; 2. bearing seat; 3. claw; 4. top block; 5. driving device; 6. intermediate roller; 7. working roller; 8. steel belt. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model is described clearly and completely below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1-3 As shown, a holding device for the working roll of a stainless steel cold rolling mill includes a rotating shaft 1, a bearing seat 2, a claw 3, a top block 4 and a driving device 5. Both ends of the two rotating shafts 1 are fixed to the bearing seats 2 at both ends of the intermediate roll 6. The top ends of the claws 3 are slidably connected to the two ends of the rotating shaft 1. One end of the top block 4 presses against the outer side of the claw 3, and the other end is fixed to the driving device 5. Multiple driving devices 5 are fixed in the main frame. The end of the top block 4 that contacts the claw 3 is hemispherical; the driving device 5, the top block 4 and the claw 3 correspond to each other and are symmetrically distributed on both sides of the working roll. The multiple driving devices 5 are simultaneously controlled by a single control device; the single control device simultaneously controls multiple driving devices to ensure the coordinated movement of multiple claws, keep the working roll level, match the top block with the driving device, prevent the gap between the working roll and the intermediate roll from being small after the roll is held, and avoid scratching the intermediate roll when pulling the roll; the contact end of the top block and the claw adopts a hemispherical force area that remains unchanged and reduces friction, thereby preventing the top block from wearing, ensuring clamping and stability during roll holding, and preventing the roll from falling.

[0023] Holding process: Figure 3 As shown, when replacing the working roll, the drive device 5 extends to drive the top block 4 to tilt the claw 3 to a certain angle to hold the working roll 7. The gaps between the working roll 7 and the intermediate roll 6 and between the working roll 7 and the steel strip 8 are moderate, and the intermediate roll 6 and the steel strip 8 will not be scratched during replacement. After the working roll replacement is completed, the drive device 5 retracts during normal rolling.

Claims

1. A holding device for a stainless steel cold rolling mill work roll, characterized in that: The invention comprises a rotating shaft (1), a bearing seat (2), a claw (3), a top block (4) and a driving device (5), wherein both ends of the two rotating shafts (1) are fixed on the bearing seats (2) at both ends of the intermediate roller, the top ends of the plurality of claws (3) are slidably connected to the two ends of the rotating shaft (1), one end of the top block (4) is pressed against the outer side surface of the claw (3), and the other end is fixed to the driving device (5), the plurality of driving devices (5) are fixed in the main frame, and the end of the top block (4) in contact with the claw (3) is hemispherical.

2. The holding device for a stainless steel cold rolling mill work roll according to claim 1, characterized in that: The driving device (5), the top block (4), and the gripping claws (3) correspond to each other and are symmetrically distributed on both sides of the working roll.

3. The holding device for a stainless steel cold rolling mill work roll according to claim 2, characterized in that: A plurality of the driving devices (5) are controlled simultaneously by a single control device.

4. The holding device for a stainless steel cold rolling mill work roll according to claim 3, characterized in that: The head length of the top block (4) is strictly controlled to be 25mm-28mm, and the gap between the working roll and the intermediate roll, and between the working roll and the steel strip reaches 10mm-15mm after the stroke is in place.

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