Roll changing device and method for a rolling mill

Abstract

The application provides a rolling mill roll changing device and method, which comprises a vertical roll transverse moving vehicle, two roll dismounting hydraulic cylinders are arranged on the vertical roll transverse moving vehicle, output shafts of the roll dismounting hydraulic cylinders are fixedly provided with connecting heads corresponding to vertical roll supports, and the connecting heads are detachably connected with the vertical roll supports; and a horizontal roll transverse moving vehicle is provided with a placing position for placing a horizontal roll. The application has the beneficial effects that, compared with the traditional roll changing method, the roll changing method of the application does not need to dismount the vertical roll beam, reduces the steps of changing the vertical roll of the short stress line rolling mill, reduces the difficulty of changing the vertical roll, reduces the rolling mill spare parts, reduces the labor intensity and difficulty of workers, simultaneously can reduce the manufacturing difficulty of the equipment, and reduces the maintenance cost.

Description

Technical Field

[0001] This invention belongs to the field of rolling mill maintenance technology, and in particular relates to a rolling mill roll changing device and method. Background Technology

[0002] Rolling mills are widely used in steel profile production lines. The main rolled products include H-beams, rails, elevator guide rails and other profiles. It is an indispensable type of rolling mill in the rolling process. H-beams, rails and other profiles have a wide range of applications in many fields. After a long period of use, the vertical and horizontal rolls of the rolling mill will wear down and need to be repaired or replaced.

[0003] The current roll changing method for short-stress-line rolling mills is whole-stand roll changing. Traditionally, this involves separating the operating side stand from the drive side stand and disassembling the vertical roll beam containing the vertical roll assembly before the vertical roll assembly can be removed for the roll changing operation. This process presents several problems: First, the vertical roll beam is quite heavy and difficult to lift. Furthermore, the vertical roll assembly's slide rail needs to be aligned with the mill support's slide rail during removal and installation, requiring a small clearance fit, making the operation difficult. Second, the vertical roll beam is the main support component of the rolling mill's vertical roll assembly. First, this component is connected to the rolling mill via hydraulic bolts or ordinary bolts. Frequent disassembly leads to bolt wear and consumption, increasing the risk of incomplete tightening due to operational errors and thus increasing the risk of accidents. Second, removing the vertical roll assembly requires rotating the vertical roll beam 90°. Similarly, after replacing the roll, the vertical roll beam must be rotated 90° before it can be installed back into the rolling mill, resulting in complex operations and high operating costs. Furthermore, because the housing needs to be fixed in the vertical roll beam during disassembly, a slide rail must be machined for the vertical roll beam, which also increases processing costs. Summary of the Invention

[0004] In view of this, the present invention aims to provide a rolling mill roll changing device and method to solve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] This invention provides a rolling mill roll changing device, comprising:

[0007] A vertical roller transverse transfer carriage is provided with two roller dismantling hydraulic cylinders. The output shaft of the roller dismantling hydraulic cylinder is fixedly provided with a connector corresponding to the vertical roller bracket. The connector is detachably connected to the vertical roller bracket.

[0008] A horizontal roller traverse car, wherein the horizontal roller traverse car is provided with a placement position for placing horizontal rollers.

[0009] Furthermore, two U-shaped placement plates are fixed on the horizontal roller transverse transfer vehicle, and the U-shaped placement plates are provided with placement grooves for placing the horizontal rollers;

[0010] The width of the placement groove is matched with the diameter of the connecting shaft of the horizontal roller;

[0011] The U-shaped placement plate has insertion holes corresponding to the upper horizontal roller, and a support rod is placed inside the insertion hole. The support rod limits the lower end face of the upper horizontal roller connecting shaft.

[0012] Furthermore, a roll removal platform is fixedly mounted on the vertical roll transverse transfer vehicle, and a guide plate corresponding to the vertical roll support is fixedly mounted on the roll removal platform. There are two guide plates, and a guide channel is formed between the two guide plates and the roll removal platform.

[0013] A liner plate is fixedly provided on the end face of the guide plate near the guide channel, and a second liner plate is fixedly provided on the end face of the roller removal platform near the guide channel.

[0014] Furthermore, the first liner is detachably connected to the guide plate, the second liner is detachably connected to the roll removal platform, and the upper end of the first liner near the edge of the guide channel has a chamfered structure.

[0015] Furthermore, the number of horizontal roller traversing carriages is two, one for carrying the upper horizontal roller and the other for carrying the lower horizontal roller;

[0016] Both the horizontal roller traverse carriage and the vertical roller traverse carriage are equipped with rollers at their bottom ends, and the horizontal roller traverse carriage and the vertical roller traverse carriage are movably connected to track one via the rollers.

[0017] Furthermore, one end of one of the horizontal roller traversing carriages is connected to one end of the vertical roller traversing carriage, and the other end of the vertical roller traversing carriage is connected to one end of the other horizontal roller traversing carriage.

[0018] The two horizontal roller traverse carriages and one vertical roller traverse carriage constitute a roller traverse device;

[0019] The number of the roll traversing devices is multiple.

[0020] Furthermore, the connector has a first insertion hole, and the vertical roller bracket has a second insertion hole corresponding to the first insertion hole. A pin is provided inside the insertion hole, and the pin passes through the first insertion hole and is located inside the second insertion hole.

[0021] Furthermore, the rolling mill roll changing device also includes two rolling mill support side-moving carriages, which are movably connected to track two via rollers, and each rolling mill support side-moving carriage carries one rolling mill support;

[0022] The second track is set perpendicular to the first track.

[0023] Another aspect of the present invention provides a rolling mill roll changing method using the rolling mill roll changing device described in one aspect, comprising the following steps:

[0024] S1. Lift the rolling mill and place the horizontal rolls of the rolling mill into the placement trough. The bottom of the placement trough supports the lower horizontal rolls, and the support rod supports the upper horizontal rolls.

[0025] S2. Connect the mill supports on both sides of the mill to the two mill support side moving cars respectively;

[0026] S3. Disassemble the mill supports on both sides of the mill and place the two horizontal rolls on a horizontal roll traversing car;

[0027] S4. The moving roll lateral movement device aligns the guide channel of the vertical roll lateral movement carriage with the position of the vertical roll support. The connecting block is fixedly connected to the vertical roll support by a pin. The output shaft of the hydraulic cylinder retracts, driving the vertical roll supports and vertical rolls on both sides to move to the roll dismantling platform.

[0028] S5. Place the two new horizontal rollers on the two horizontal roller traverse carriages respectively, place the two vertical roller brackets with the new vertical rollers in the guide channel, and use pins to connect the vertical roller brackets to the connecting block of the hydraulic cylinder.

[0029] S6. The moving roll lateral movement device aligns the roll support with the new roll with the roll mounting position of the mill support. The output shaft of the hydraulic cylinder extends, driving the roll support with the new roll into the roll mounting position.

[0030] S7. Move the rolling mill support side-shifting car to move the two rolling mill supports so that the two horizontal rolls are respectively inserted into the two horizontal roll mounting positions;

[0031] S8. Remove the support rods and lift the rolling mill after the roll change to the designated position.

[0032] Furthermore, in step S4, two new horizontal rollers are placed on another horizontal roller traverse carriage.

[0033] Compared with the prior art, the rolling mill roll changing device and method of the present invention have the following advantages:

[0034] (1) The rolling mill roll changing device and method of the present invention, compared with the traditional roll changing method, does not require disassembling the vertical roll beam, reduces the steps of replacing the vertical roll of the short stress line rolling mill, reduces the difficulty of replacing the vertical roll, reduces the replacement of rolling mill spare parts, reduces the labor intensity and difficulty of workers, and at the same time reduces the manufacturing difficulty of the equipment and reduces the cost. Attached Figure Description

[0035] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0036] Figure 1 This is a schematic diagram of the structure of the rolling mill roll changing device according to an embodiment of the present invention;

[0037] Figure 2 This is a side view of the vertical roller transverse transfer car structure according to an embodiment of the present invention;

[0038] Figure 3 As described in the embodiments of the present invention Figure 1 Schematic diagram at point A in the middle;

[0039] Figure 4 This is a schematic diagram of the structure of the guide plate according to an embodiment of the present invention;

[0040] Figure 5 This is a side view of the horizontal roller traverse car according to an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the rolling mill in its undisassembled state according to an embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the disassembly state of the rolling mill as described in an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Horizontal roll traverse car; 2. Vertical roll traverse car; 3. Horizontal roll; 4. Vertical roll support; 5. Roll dismantling platform; 6. U-shaped placement plate; 7. Support rod; 8. Mill support; 9. Hydraulic cylinder; 301. Connecting shaft; 501. Guide plate; 502. Liner plate two; 503. Liner plate one; 601. Placement groove. Detailed Implementation

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not 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 the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] like Figures 1 to 5 As shown, a rolling mill roll changing device includes:

[0050] The vertical roller transverse transfer carriage 2 is equipped with two roller dismantling hydraulic cylinders 9. The output shaft of the roller dismantling hydraulic cylinder 9 is fixedly equipped with a connector corresponding to the vertical roller bracket 4. The connector is detachably connected to the vertical roller bracket 4.

[0051] The horizontal roller traverse car 1 has a placement position for placing the horizontal roller 3.

[0052] Two U-shaped placement plates 6 are fixed on the horizontal roller transverse transfer vehicle 1, and the U-shaped placement plates 6 are provided with placement grooves 601 for placing the horizontal rollers 3.

[0053] The width of the placement groove 601 matches the diameter of the connecting shaft 301 of the horizontal roller 3;

[0054] The U-shaped placement plate 6 has insertion holes corresponding to the upper horizontal roller 3. A support rod 7 is inserted into each hole, and the support rod 7 limits the lower end face of the connecting shaft 301 of the upper horizontal roller 3. By inserting and removing the support rod 7, the action of placing two horizontal rollers 3 at once can be completed, improving work efficiency.

[0055] A roller removal platform 5 is fixedly installed on the vertical roller transverse transfer carriage 2. A guide plate 501 corresponding to the vertical roller bracket 4 is fixedly installed on the roller removal platform 5. There are two guide plates 501, and a guide channel is formed between the two guide plates 501 and the roller removal platform 5.

[0056] A first liner 503 is fixedly mounted on the end face of the guide plate 501 near the guide channel, and a second liner 502 is fixedly mounted on the end face of the roll removal platform 5 near the guide channel. Both the first liner 503 and the second liner 502 are copper structural components, which serve two purposes: firstly, to prevent scratches on the vertical roll support 4, and secondly, to provide good self-lubrication and reduce resistance during the movement of the vertical roll support 4. The distance between the two first liners 503 matches the width of the vertical roll support 4, thus guiding the movement of the vertical roll support 4 and facilitating its installation and removal.

[0057] Liner plate 503 is detachably connected to guide plate 501, and liner plate 502 is detachably connected to roller removal platform 5. The upper edge of liner plate 503 near the guide channel has a chamfered structure. The chamfered structure of liner plate 503 facilitates the insertion of the roller bracket 4 with the new roller installed.

[0058] The horizontal roller transverse transfer carriage 1 has two carriages, one for carrying the upper horizontal roller 3 and the other for carrying the lower horizontal roller 3;

[0059] Both the horizontal roller traverse carriage 1 and the vertical roller traverse carriage 2 are equipped with rollers at their bottom ends, and are movably connected to track 1 via the rollers.

[0060] One end of one horizontal roller traverse carriage 1 is connected to one end of the vertical roller traverse carriage 2, and the other end of the vertical roller traverse carriage 2 is connected to one end of the traverse carriage of another horizontal roller 3.

[0061] Two horizontal roller traverse carriages 1 and one vertical roller traverse carriage 2 constitute a roll traverse device;

[0062] There are multiple roll traverse devices.

[0063] The connector has a first insertion hole, and the vertical roller bracket 4 has a second insertion hole corresponding to the first insertion hole. A pin is provided inside the insertion hole, and the pin passes through the first insertion hole and is located inside the second insertion hole.

[0064] The mill roll changing device also includes two mill support 8 side moving cars. The mill support 8 side moving cars are movably connected to the second track via rollers. Each mill support 8 side moving car carries one mill support 8.

[0065] Track 2 is set perpendicular to track 1.

[0066] like Figures 6 to 7 As shown, a method for changing rolls in a rolling mill includes the following steps:

[0067] S1. Lift the rolling mill and place the horizontal roll 3 of the rolling mill into the placement groove 601. The bottom end of the placement groove 601 supports the lower horizontal roll 3, and the support rod 7 supports the upper horizontal roll 3.

[0068] S2. Connect the mill supports 8 on both sides of the mill to the two mill support side moving cars respectively;

[0069] S3. Disassemble the mill supports 8 on both sides of the mill and place the two horizontal rolls 3 on a horizontal roll traversing car 1.

[0070] S4. Move the roll lateral movement device so that the guide channel of the vertical roll lateral movement car 2 corresponds to the position of the vertical roll support 4. Fix the connecting block to the vertical roll support 4 through the pin. The output shaft of the hydraulic cylinder 9 retracts to drive the vertical roll supports 4 and the vertical roll on both sides to move to the roll dismantling platform 5.

[0071] S5. Place two new horizontal rollers 3 on two horizontal roller traversing carriages 1 respectively, place two vertical roller brackets 4 with new vertical rollers installed in the guide channel, and use pins to connect the vertical roller brackets 4 to the connecting block of the hydraulic cylinder 9.

[0072] S6. The moving roll lateral movement device aligns the vertical roll support 4 with the new vertical roll with the vertical roll mounting position of the mill support 8. The output shaft of the hydraulic cylinder 9 extends, driving the vertical roll support 4 with the new vertical roll into the vertical roll mounting position.

[0073] S7. Move the two mill supports 8 to the side so that the two horizontal rolls 3 are respectively inserted into the two horizontal roll 3 installation positions;

[0074] S8. Remove support rod 7 and lift the rolling mill after the roll change to the designated position.

[0075] In step S4, two new horizontal rollers 3 are placed on another horizontal roller traverse car 1.

[0076] Compared with traditional roll changing methods, the roll changing method of the present invention does not require disassembling the vertical roll beam, reduces the steps of replacing vertical rolls in short stress line rolling mills, reduces the difficulty of replacing vertical rolls, reduces the need to replace spare parts in the rolling mill, reduces the labor intensity and difficulty for workers, and at the same time reduces the manufacturing difficulty of equipment and reduces costs.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method of roll change for a universal rolling mill, characterized in that: A universal rolling mill roll changing device was used. The device includes a horizontal roll traversing car (1) and a vertical roll traversing car (2). The two horizontal roll traversing cars (1) and one vertical roll traversing car (2) constitute a roll traversing device. The vertical roller traverse carriage (2) is equipped with two hydraulic cylinders (9), and the output shaft of the hydraulic cylinder (9) is fixedly equipped with a connector corresponding to the vertical roller bracket (4). The connector is detachably connected to the vertical roller bracket (4). The vertical roller traverse carriage (2) is fixedly equipped with a roller disassembly platform (5). The horizontal roller traverse carriage (1) is provided with a placement groove (601) for placing the horizontal roller (3); two U-shaped placement plates (6) are fixed on the horizontal roller traverse carriage (1), and the U-shaped placement plates (6) are provided with a placement groove (601) for placing the horizontal roller (3); the U-shaped placement plates (6) are provided with insertion holes corresponding to the upper horizontal roller (3), and the insertion holes are provided with support rods (7); The roller changing method includes the following steps: S1. Lift the universal rolling mill and place the horizontal roll (3) of the universal rolling mill into the placement groove (601). The bottom end of the placement groove (601) is used to support the lower horizontal roll (3), while the support rod (7) pre-inserted into the U-shaped placement plate (6) is used to support the lower end face of the connecting shaft (301) of the upper horizontal roll (3). S2. Connect the mill supports (8) on both sides of the universal mill to the two mill support side moving cars respectively; S3. Disassemble the mill supports (8) on both sides of the universal mill and place the two horizontal rolls (3) on a horizontal roll traversing car (1); S4. Move the roll traverse device so that the guide channel on the roll traverse carriage (2) is aligned with the position of the roll support (4) on the universal mill; then use a pin to fix the connector on the output shaft of the hydraulic cylinder (9) to the roll support (4); then operate the hydraulic cylinder (9) to retract its output shaft, thereby pulling out the roll supports (4) on both sides together with the rolls on them, and moving them to the roll removal platform (5) of the roll traverse carriage (2); place the two new horizontal rolls (3) on another horizontal roll traverse carriage (1); S5. Place the two vertical roller brackets (4) with the new vertical rollers already installed into the guide channel of the vertical roller traverse car (2), and use pins to fix the connectors of these new vertical roller brackets (4) to the hydraulic cylinder (9); S6. The moving roll lateral movement device aligns the roll support (4) with the new roll with the ... S7. Move the side-shifting car of the moving mill support to move the two mill supports (8) to ensure that the two horizontal rolls (3) are respectively inserted into the two horizontal roll (3) installation positions; S8. Remove the support rod (7) and lift the universal rolling mill after the roll change to the designated position.

2. The universal rolling mill roll changing method according to claim 1, characterized in that: The width of the placement groove (601) matches the diameter of the connecting shaft (301) of the horizontal roller (3); the support rod (7) limits the lower end face of the connecting shaft (301) of the upper horizontal roller (3).

3. The universal rolling mill roll changing method according to claim 1, characterized in that: The roll dismantling platform (5) is fixedly provided with a guide plate (501) corresponding to the vertical roll support (4). There are two guide plates (501), and a guide channel is formed between the two guide plates (501) and the roll dismantling platform (5). A liner plate (503) is fixedly provided on the end face of the guide plate (501) near the guide channel, and a liner plate (502) is fixedly provided on the end face of the roll dismantling platform (5) near the guide channel.

4. The universal rolling mill roll changing method according to claim 3, characterized in that: The first liner (503) is detachably connected to the guide plate (501), and the second liner (502) is detachably connected to the roller removal platform (5). The upper end of the first liner (503) near the edge of the guide channel has a chamfered structure.

5. The universal rolling mill roll changing method according to claim 1, characterized in that: Both the horizontal roller traverse carriage (1) and the vertical roller traverse carriage (2) are equipped with rollers at their bottom ends. The horizontal roller traverse carriage (1) and the vertical roller traverse carriage (2) are movably connected to the track one via the rollers.

6. The universal rolling mill roll changing method according to claim 1, characterized in that: One end of one of the horizontal roller traversing carriages (1) is connected to one end of the vertical roller traversing carriage (2), and the other end of the vertical roller traversing carriage (2) is connected to one end of another horizontal roller traversing carriage (1); the number of the roller traversing devices is multiple.

7. The universal rolling mill roll changing method according to claim 1, characterized in that: The connector has a first insertion hole, and the vertical roller bracket (4) has a second insertion hole corresponding to the first insertion hole. The first insertion hole is provided with a pin, and the pin passes through the first insertion hole and is located inside the second insertion hole.

8. The universal rolling mill roll changing method according to claim 1, characterized in that: The universal rolling mill roll changing device also includes two rolling mill support side-moving carriages. The rolling mill support side-moving carriages are movably connected to the second track via rollers. Each rolling mill support side-moving carriage carries a rolling mill support (8). The second track is set perpendicular to the first track.

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