A disassembly and assembly device for replacing the work rolls of a four-high rolling mill

Abstract

The utility model discloses a disassembly and assembly device for replacing the working roll of a four-roll mill, comprising a clamping plate, which is a vertically arranged U-shaped plate, the opening of the clamping plate faces downward, and the upper part of the opening is semicircular, and the radius of the semicircle is the same as the radius of the clamping ring lock nut on the working roll; a guide plate is horizontally arranged on both sides of the bottom edge of the clamping plate; two support plates are arranged perpendicular to the U-shaped surface of the clamping plate, and the two support plates are located on both sides of the opening of the clamping plate; the ends of the two support plates away from the clamping plate are connected by a pulling plate; the opening on the clamping plate is used to be sleeved between the gap between the clamping ring lock nut and the bearing seat of the working roll; the two guide plates are used to be placed on the guide rail of the working roll; the pulling plate is used to be connected with the cylinder head of the hydraulic cylinder, and moves outward under the pulling action of the hydraulic cylinder to pull the working roll out of the rolling mill. The device solves the problem of low efficiency of the existing working roll replacement method.

Description

[Technical field]

[0001] The utility model belongs to the technical field of working roll disassembly and assembly devices, and in particular relates to a disassembly and assembly device for replacing working rolls of a four-roller rolling mill. [Background technology]

[0002] The four-roll mill is a common metal processing equipment, usually composed of four longitudinally arranged rolls, including two working rolls in the middle and support rolls at both ends. The existing working roll replacement method used in the hot-rolled strip operation area of ​​the rolling mill is: wire holes are designed on both sides of the bearing seat on the operating side of the working roll, two round steel wire heads are installed in the wire holes, and then the middle of the two round steel wire heads are connected with a hook, and the working roll is disassembled and assembled by pulling the hook. It was found in use that after using this method for about a week, the round steel wire head will bend, deform or break, which will affect the roll replacement time. It cannot be used for a long time and the material consumption cost is high. Moreover, this replacement method requires the pre-installation of the round steel wire head in front of the working roll, and it must be removed one by one after the working roll is replaced. According to the process requirements, at least seven working rolls must be replaced per shift, which greatly increases the labor intensity of employees and has low roll replacement efficiency. [Contents of the utility model]

[0003] The utility model aims to provide a disassembly and assembly device for replacing working rolls of a four-roll rolling mill, so as to solve the problem of low efficiency of the existing working roll replacement method.

[0004] The utility model adopts the following technical scheme: a disassembly and assembly device for replacing the working rolls of a four-roll rolling mill, comprising a clamping plate, which is a vertically arranged U-shaped plate, the opening of the clamping plate faces downward, the upper part of the opening is semicircular, and the radius of the semicircle is the same as the radius of the clamping ring lock nut on the working roll; a guide plate is horizontally arranged on both sides of the bottom edge of the clamping plate;

[0005] Two support plates are arranged on the U-shaped surface of the vertical card plate, and the two support plates are located on both sides of the card plate opening; the ends of the two support plates away from the card plate are connected by a pull plate;

[0006] The opening on the clamping plate is used to be inserted between the gap between the clamping ring lock nut of the working roll and the bearing seat; the two guide plates are used to be placed on the guide rails of the working roll; the pulling plate is used to connect with the cylinder head of the hydraulic cylinder and move outward under the pulling action of the hydraulic cylinder to pull the working roll out of the rolling mill.

[0007] Furthermore, two handles are provided on the outer side of each support plate.

[0008] Furthermore, a reinforcing rib plate is connected between the two support plates.

[0009] The beneficial effects of the utility model are as follows: by designing a clamping plate with a U-shaped opening, the opening is clamped in the gap between the clamping ring lock nut and the bearing seat on the operating side of the working roll, so that the connection between the disassembly device and the working roll can be easily realized, and then the disassembly of the working roll can be easily realized through the detachable connection between the cylinder head of the hydraulic cylinder and the disassembly device. The old working roll of the device can be used, and the new working roll can also be installed by the device, which reduces the roll changing time, greatly improves the roll changing efficiency of the working roll, reduces the material consumption cost, and reduces the labor intensity of personnel.

Brief Description of the Drawings

[0010] Figure 1 This is a structural schematic diagram of a disassembly and assembly device for replacing working rolls of a four-roller rolling mill according to the utility model;

[0011] Figure 2 This is a schematic structural diagram of a working roll in a disassembly and assembly device for replacing a working roll of a four-roller rolling mill according to the utility model;

[0012] Figure 3 The utility model is a schematic diagram of the use status of a disassembly and assembly device for replacing the working rolls of a four-roller rolling mill.

[0013] Among them, 1. clamping plate, 2. guide plate, 3. support plate, 4. pull plate, 5. reinforcing rib plate, 6. handle, 7. snap ring lock nut, 8. bearing seat, 9. guide rail, 10. cylinder head, 11. hydraulic cylinder, 12. working roller. [Specific implementation method]

[0014] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0015] The utility model provides a disassembly and assembly device for replacing the working rolls of a four-roller rolling mill, such as Figure 1 As shown, it includes a clamping plate 1, which is a vertically arranged U-shaped plate, the opening of the clamping plate 1 faces downward, and the upper part of the opening is semicircular, and the radius of the semicircle is the same as the radius of the clamping ring lock nut on the working roll; a guide plate 2 is horizontally arranged on both sides of the bottom edge of the clamping plate 1.

[0016] Two support plates 3 are arranged on the U-shaped surface of the vertical clamping plate 1 , and the two support plates 3 are located on both sides of the opening of the clamping plate 1 ; the ends of the two support plates 3 away from the clamping plate 1 are connected by a pull plate 4 .

[0017] like Figure 2 and Figure 3 As shown, the opening on the clamping plate 1 is used to be inserted into the gap between the clamping ring lock nut 7 of the working roll and the bearing seat 8, which is a connection method that is easy to install and disassemble.

[0018] Two guide rails 9 are arranged outside the operating side of the working roll 12, and the two guide rails 9 are located on both sides of the working roll 12. The two guide plates 2 are used to be placed on the guide rails 9 of the working roll and move along the guide rails 9 when changing the rolls.

[0019] The pull plate 4 is used to be connected with the cylinder head 10 of the hydraulic cylinder 11, and the cylinder head 10 is a mechanical claw structure with adjustable angle. The pull plate 4 moves outward under the pulling action of the hydraulic cylinder 11 to pull the working roll 12 out of the four-high rolling mill.

[0020] In some embodiments, two handles 6 are provided on the outer side of each support plate 3. The handles 6 can facilitate the movement of the disassembly and assembly device.

[0021] In some embodiments, a reinforcing rib plate 5 is connected between the two support plates 3. The reinforcing rib plate 5 can increase the strength of the disassembly and assembly device and extend its service life.

[0022] like Figure 3 As shown, the method of using the disassembly and assembly device for replacing the working rolls of a four-high rolling mill of the utility model is as follows:

[0023] When removing the working roll 12, manually lift the handles 6 on both sides, and insert the opening on the clamping plate 1 into the gap between the clamping ring lock nut 7 and the bearing seat 8 on the operating side of the working roll 12 to ensure that it is clamped in place.

[0024] Then the cylinder head 10 is clamped onto the pulling plate 4, and the working roll 12 can be easily pulled out from the four-roller rolling mill by operating the hydraulic cylinder 11.

[0025] After the working roll 12 is pulled out, a new working roll 12 is replaced, and the new working roll 12 is pushed back into the four-roll mill through the disassembly and assembly device of the utility model, thereby completing the replacement of the working roll.

[0026] When multiple four-roller mills need to change rolls, each mill can be equipped with a disassembly and assembly device, so that the rolls of multiple mills can be replaced at the same time, improving the roll changing efficiency. During normal steel-passing, each disassembly and assembly device can be neatly placed in front of the four-roller mill without affecting the on-site visit effect.

Claims

1. A disassembly and assembly device for replacing the working rolls of a four-high rolling mill, characterized in that: The invention comprises a clamping plate (1), wherein the clamping plate (1) is a vertically arranged U-shaped plate, the opening of the clamping plate (1) faces downward, the upper part of the opening is semicircular, and the radius of the semicircle is the same as the radius of the clamping ring lock nut (7) on the working roller (12); a guide plate (2) is horizontally arranged on both sides of the bottom edge of the clamping plate (1); Two support plates (3) are arranged perpendicular to the U-shaped surface of the card plate (1), and the two support plates (3) are located on both sides of the opening of the card plate (1); the ends of the two support plates (3) away from the card plate (1) are connected by a pull plate (4); The opening on the clamping plate (1) is used to be inserted into the gap between the clamping ring lock nut (7) and the bearing seat (8) of the working roll; the two guide plates (2) are used to be placed on the guide rail (9) of the working roll; the pulling plate (4) is used to be connected to the cylinder head (10) of the hydraulic cylinder (11) and move outward under the pulling action of the hydraulic cylinder (11) to pull the working roll (12) out of the rolling mill.

2. A disassembly and assembly device for replacing working rolls of a four-high rolling mill as claimed in claim 1, characterized in that: Two handles (6) are provided on the outer side of each support plate (3).

3. A disassembly and assembly device for replacing working rolls of a four-high rolling mill as claimed in claim 1 or 2, characterized in that: A reinforcing rib plate (5) is connected between the two support plates (3).

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