Disassembling and assembling device and method for working roll bearing box of aluminum alloy cold finishing mill

Abstract

The invention relates to the technical field of disassembling tools, in particular to an aluminum alloy cold finishing mill working roll bearing box disassembling and assembling device and disassembling and assembling method.The aluminum alloy cold finishing mill working roll bearing box disassembling and assembling device is provided with a workbench and is characterized in that the workbench is in a strip shape, four working roll positioning seats are arranged on the strip-shaped workbench, and positioning grooves are formed in the upper portions of the working roll positioning seats; by means of the device and the method, the gearbox can be rapidly disassembled and assembled, and the device and the method have the advantages that the structure is simple, the disassembling and assembling efficiency is high, the disassembling and assembling effect is good, manpower is saved, and a bearing box is protected.

Description

Technical Field

[0001] The invention relates to the technical field of disassembly tooling, and in particular to an aluminum alloy cold finishing rolling mill working roll bearing box disassembly device and method which has simple structure, high disassembly efficiency, good disassembly effect, saves manpower, and protects the bearing box. Background Art

[0002] As we all know, with the rapid development of the aluminum industry, higher requirements are put forward for the quality of aluminum materials of cold finishing mills. When defects occur in aluminum materials, they can be corrected in time. Many defects of aluminum materials are caused by contact with working rolls. In order to ensure quality and production efficiency, it is necessary to quickly replace the working rolls with guaranteed quality and quantity. At the same time, to ensure safety at work, a working platform for quickly and accurately disassembling and assembling the working roll bearing box is required. At present, there are two schemes for disassembling the working roll bearing box: one is to use a crane hook to lift the working roll bearing box for disassembly and assembly, and the other is to use a hand-cranked platform to disassemble and assemble the working roll bearing box. The above two disassembly and assembly schemes are prone to abnormal damage to the bearings and skeleton oil seals when disassembling and assembling the bearing box, and the disassembly and assembly efficiency is low. At present, when the height of the bearing box carrying lifting platform is adjusted by a hand-cranked wheel to lift the bearing box to disassemble the bearing box, the bearing box is prone to relative sliding on the bearing box carrying lifting platform, which is not conducive to safety and is not conducive to improving disassembly efficiency. It is easy to cause damage and wear to the bearings and skeleton oil seals in the bearing box. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and to provide an aluminum alloy cold finishing mill working roll bearing box disassembly and assembly device and disassembly and assembly method which has a simple structure, high disassembly and assembly efficiency, good disassembly and assembly effect, saves manpower, and protects the bearing box.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A disassembly and assembly device for the working roll bearing box of an aluminum alloy cold finishing rolling mill is provided with a workbench, characterized in that the workbench is in a strip shape, four working roll positioning seats are arranged on the strip workbench, positioning grooves are arranged above the working roll positioning seats, and front and rear moving mechanisms, left and right moving mechanisms, up and down lifting mechanisms and bearing platforms are respectively arranged on the left and right sides of the workbench, the front and rear moving mechanisms include a trolley travel rack, a trolley drive gear, a trolley drive motor, a trolley moving platform and a trolley travel wheel, the trolley travel rack is fixed to the ground on the left and right sides of the strip workbench, four trolley travel wheels are respectively installed below the trolley moving platform, the trolley travel wheels are rollingly connected to the upper end surface of the trolley travel rack, the trolley drive motor is fixedly connected below the trolley moving platform, and the output of the trolley drive motor The end is connected with the trolley driving gear, the trolley driving gear is meshed with the trolley walking rack, and the trolley driving motor drives the trolley driving gear to rotate, thereby driving the trolley moving platform to move on the trolley walking rack. A left and right moving mechanism is installed above the trolley moving platform, and the left and right moving mechanism includes a trolley walking rack, a trolley driving gear, a trolley driving motor, a trolley moving platform and a trolley walking wheel. The trolley walking rack is fixed on the trolley moving platform along the left and right directions of the trolley moving platform, and four trolley walking wheels are respectively installed below the trolley moving platform, and the trolley walking wheels are rollingly connected to the upper end surface of the trolley walking rack. The trolley driving motor is fixedly connected to the bottom of the trolley moving platform, and the output end of the trolley driving motor is connected to the trolley driving gear. The wheel is meshed with the trolley travel rack, and the trolley drive gear is driven to rotate by the trolley drive motor, thereby driving the trolley moving platform to move on the trolley travel rack. An up and down lifting mechanism is installed above the trolley moving platform, and the up and down lifting mechanism includes a linear bearing, a guide column, a lifting screw, a rotating gear, a steering gear, a threaded sleeve, and a servo motor. The linear bearings are respectively fixed at the four corner positions of the trolley moving platform, the lower end of the guide column is inserted into the linear bearing, and the upper end of the guide column extends out of the linear bearing and is connected to the bearing platform. The threaded sleeve is fixedly connected to the trolley moving platform, the lower end of the lifting screw extends into the threaded sleeve and is threadedly connected to the threaded sleeve, the upper end of the lifting screw is connected to the lower end of the bearing platform, and the upper end of the threaded sleeve is rotatably connected to the rotating gear through the bearing. A threaded hole is provided in the center of the rotating gear, and the rotating gear is threadedly connected to the lifting screw. A servo motor is fixed on the trolley moving platform on the side of the rotating gear, and the output end of the servo motor is connected to the steering gear. The steering gear is meshed with the rotating gear, and the steering gear drives the rotating gear to rotate and then drives the lifting and lowering of the lifting screw, and finally realizes the lifting and lowering of the bearing platform. A gear box push plate and a gear box inner pull plate are provided on the platform, and strip holes are respectively provided on the inner and outer sides of the bearing platform. A gear box inner pull plate is provided in the strip hole on the inner side of the bearing platform, and a gear box push plate is provided in the strip hole on the outer side of the bearing platform. A linear drive mechanism is fixed on the inner and outer sides of the lower end surface of the bearing platform, and the output end of the linear drive mechanism is connected to the gear box push plate and the gear box inner pull plate.The linear drive mechanism drives the gear box push plate and the gear box pull plate to extend out of the strip hole or retract into the strip hole.

[0005] A controller is provided on the carrying platform described in the present invention, and the controller is respectively connected to the trolley drive motor, the cart drive motor, the servo motor, and the linear drive mechanism. The controller controls the number of revolutions of the trolley drive motor, the cart drive motor, the servo motor, and the linear drive mechanism, thereby controlling the moving distance of the trolley, the moving distance of the cart, the lifting distance of the servo motor, and the lifting distance of the linear drive mechanism.

[0006] The positioning groove of the present invention is V-shaped, which ensures stable positioning of the working roll.

[0007] The outer side of the working roll positioning seat described in the present invention is provided with a working roll clamping platform, which extends above the bottom of the V-shaped positioning groove. The working roll clamping platform is clamped in the groove of the working roll, and the working roll is axially positioned by the working roll clamping platform.

[0008] The bearing platform described in the present invention is provided with two groups of strip holes on the inner and outer sides, and the two groups of strip holes are respectively provided with gear box push plates and gear box inner pull plates. The gear boxes on the two groups of working roll positioning seats can be disassembled and installed through the two groups of gear box push plates and gear box inner pull plates.

[0009] The linear drive mechanism described in the present invention includes a linear motor, a first gear, a second gear, and a threaded rod. The output end is connected to the first gear, and the linear drive mechanism is fixed to the lower end surface of the carrying platform. The first gear is meshed with the second gear, and the second gear is rotatably connected to the bottom of the carrying platform via a bearing. A threaded hole is provided in the middle of the second gear, and the lower end of the inner pull plate or the outer push plate of the gear box is connected to the threaded rod, and the threaded rod is connected to the threaded hole of the second gear. The first gear is driven to rotate by the linear motor and then the second gear is driven to rotate, thereby realizing the lifting and lowering of the threaded rod, and realizing the lifting and lowering action of the inner pull plate or the outer push plate of the gear box.

[0010] A disassembly and assembly method for a working roll bearing box disassembly and assembly device of an aluminum alloy cold finishing rolling mill, characterized in that the disassembly and assembly method steps are as follows: (1) Disassembly steps: First, the crane moves the working roll of the gear box to be disassembled to the working roll positioning seat position, and drops the working roll on the working roll positioning seat, and the working roll clamping table is clamped in the groove of the working roll, and then the trolley drive motor is started, and the trolley drive motor drives the trolley moving platform to move to the working roll positioning seat position, and then the trolley drive motor is started, and the trolley drive motor drives the trolley moving platform to move to the position where the gear box inner pull plate is located on the inner side of the gear box, and then the servo motor is driven, and the servo motor drives the carrying platform to rise to support the gear box and ensure that the axis of the gear box and the axis of the working roll are in a straight line, and then the linear drive mechanism is started, and the linear drive mechanism extends the gear box inner pull plate, and the gear box inner pull plate contacts the inner side of the gear box, and then the trolley drive motor is started, and the trolley drive motor drives the trolley moving platform to move outward and then pull the gear box outward, and finally remove the gear box from the working roll; (2) Installation steps: First, the crane adjusts the working roll of the gearbox to be installed to the working roll positioning seat position, and drops the working roll on the working roll positioning seat. The working roll clamping table is clamped in the groove of the working roll. Then, the gearbox to be installed is hoisted to the top of the bearing platform by the crane, and moved to the position where the gearbox push-out plate is located on the outer side of the gearbox. Then, the trolley drive motor is started, and the trolley drive motor drives the trolley moving platform to move to the working roll positioning seat position. Then, the servo motor is driven. The servo motor drives the bearing platform to rise to the gearbox installation position and ensures that the axis of the gearbox is in a straight line with the axis of the working roll. Then, the linear drive mechanism is started. The linear drive mechanism extends the gearbox push-out plate. The gearbox push-out plate contacts the outer side of the gearbox. Then, the trolley drive motor is started. The trolley drive motor drives the trolley moving platform to move inward and pushes the gearbox inward. Finally, the gearbox is installed on the working roll.

[0011] The present invention adopts the above structure and method, and has the advantages of simple structure, high disassembly and assembly efficiency, good disassembly and assembly effect, saving manpower, protecting the bearing box, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention.

[0013] Figure 2 yes Figure 1 Middle side view.

[0014] Figure 3 yes Figure 1 Structural diagram of the connection between the linear drive mechanism and the carrying platform. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings: As shown in the accompanying drawings, a disassembly and assembly device for the working roll bearing box of an aluminum alloy cold finishing rolling mill is provided with a workbench 1, which is characterized in that the workbench 1 is in a strip shape, and four working roll positioning seats 2 are provided on the strip workbench 1, and a positioning groove 3 is provided above the working roll positioning seat 2. The left and right sides of the workbench 1 are respectively provided with a front and rear moving mechanism, a left and right moving mechanism, an up and down lifting mechanism and a bearing platform 29, and the front and rear moving mechanism includes a trolley travel rack 4, a trolley driving gear 5, a trolley driving motor 6, a trolley moving support platform 7 and a trolley travel wheel 8. The trolley travel rack 4 is fixed on the ground on the left and right sides of the strip workbench 1, and four trolley travel wheels 8 are respectively installed under the trolley moving support platform 7, and the trolley travel wheels 8 roll with the upper end surface of the trolley travel rack 4. The trolley driving motor 6 is fixedly connected to the bottom of the trolley moving platform 7, and the output end of the trolley driving motor 6 is connected to the trolley driving gear 5, which is meshed with the trolley walking rack 4. The trolley driving gear 5 is driven to rotate by the trolley driving motor 6, thereby driving the trolley moving platform 7 to move on the trolley walking rack 4. A left-right moving mechanism is installed above the trolley moving platform 7. The left-right moving mechanism includes a trolley walking rack 9, a trolley driving gear 10, a trolley driving motor 11, a trolley moving platform 12 and a small trolley walking wheel 13. The trolley walking rack 9 is fixed on the trolley moving platform 7 along the left and right directions of the trolley moving platform 7, and four small trolley walking wheels are respectively installed below the trolley moving platform 12. 13, the trolley walking wheel 13 is rollingly connected to the upper end surface of the trolley walking rack 9, the trolley driving motor 11 is fixedly connected to the bottom of the trolley moving platform 12, the output end of the trolley driving motor 11 is connected to the trolley driving gear 10, the trolley driving gear 10 is meshed with the trolley walking rack 9, the trolley driving motor 11 drives the trolley driving gear 10 to rotate, and then drives the trolley moving platform 12 to move on the trolley walking rack 9, an up and down lifting mechanism is installed above the trolley moving platform 12, and the up and down lifting mechanism includes a linear bearing 14, a guide column 15, a lifting screw 16, a rotating gear 17, a steering gear 18, a threaded sleeve 19, and a servo motor 20, and the linear bearings 14 are respectively fixed on the trolley moving platform At the four corner positions of 12, the lower end of the guide column 15 is inserted into the linear bearing 14, the upper end of the guide column 15 extends out of the linear bearing 14 and is connected to the bearing platform 29, the threaded sleeve 19 is fixedly connected to the trolley moving platform 12, the lower end of the lifting screw 16 extends into the threaded sleeve 19 and is threadedly connected to the threaded sleeve 19, the upper end of the lifting screw 16 is connected to the lower end of the bearing platform 29, the upper end of the threaded sleeve 19 is rotatably connected to the rotating gear 17 through a bearing, the center of the rotating gear 17 is provided with a threaded hole, the rotating gear 17 is threadedly connected to the lifting screw 16, the servo motor 20 is fixed on the trolley moving platform 12 on the side of the rotating gear 17, the output end of the servo motor 20 is connected to the steering gear 18, and the steering gear 18 is meshed with the rotating gear 17,The steering gear 18 drives the rotating gear 17 to rotate and then drives the lifting screw 16 to lift and lower, and finally realizes the lifting and lowering of the bearing platform 29. The bearing platform is provided with a gear box push plate 21 and a gear box inner pull plate 22. The inner and outer sides of the bearing platform 29 are respectively provided with strip holes. The inner strip hole of the bearing platform 29 is provided with a gear box inner pull plate 22, and the outer strip hole of the bearing platform 29 is provided with a gear box push plate 21. The inner and outer sides of the lower end surface of the bearing platform 29 are respectively fixed with a linear drive mechanism 23. The output end of the linear drive mechanism 23 is connected with the gear box push plate 21 and the gear box inner pull plate 22. The gear box push plate 21 and the gear box inner pull plate 22 are driven by the linear drive mechanism 23 to extend out of the strip hole or retract into the strip hole.

[0016] Furthermore, a controller is provided on the carrying platform 29, and the controller is respectively connected to the trolley drive motor 6, the trolley drive motor 11, the servo motor 20, and the linear drive mechanism 23. The controller controls the number of revolutions of the trolley drive motor 6, the trolley drive motor 11, the servo motor 20, and the linear drive mechanism 23, thereby controlling the moving distance of the trolley, the moving distance of the trolley, the lifting and lowering distance of the servo motor 20, and the lifting and lowering distance of the linear drive mechanism 23.

[0017] Furthermore, the positioning groove 3 is V-shaped to ensure stable positioning of the working roll.

[0018] Furthermore, a working roll clamping platform 24 is provided on the outer side of the working roll positioning seat 2. The working roll clamping platform 24 extends above the bottom of the V-shaped positioning groove 3. The working roll clamping platform 24 is clamped in the groove of the working roll, and the working roll is axially positioned by the working roll clamping platform 24.

[0019] Furthermore, two groups of strip holes are provided on the inner and outer sides of the bearing platform 29, and the two groups of strip holes are respectively provided with a gear box outer push plate 21 and a gear box inner pull plate 22. The gear boxes on the two groups of working roll positioning seats 2 can be disassembled and installed through the two groups of gear box outer push plates 21 and the gear box inner pull plates 22.

[0020] Furthermore, the linear drive mechanism 23 includes a linear motor 25, a first gear 26, a second gear 27, and a threaded rod 28. The output end of the linear motor 25 is connected to the first gear 26, and the linear motor 25 is fixed to the lower end surface of the supporting platform 29. The first gear 26 is meshed with the second gear 27. The second gear 27 is rotatably connected to the bottom of the supporting platform 29 via a bearing 30. A threaded hole is provided in the middle of the second gear 27. The lower end of the gear box inner pull plate 22 or the gear box outer push plate 21 is connected to the threaded rod 28, and the threaded rod 28 is connected to the threaded hole of the second gear 27. The linear motor 25 drives the first gear 26 to rotate and then drives the second gear 27 to rotate, thereby realizing the lifting and lowering of the threaded rod 28 to realize the lifting and lowering of the gear box inner pull plate 22 or the gear box outer push plate 21.

[0021] The disassembly and assembly steps are as follows: (1) Disassembly steps: First, the crane moves the working roll of the gear box to be disassembled to the position of the working roll positioning seat 2, and drops the working roll on the working roll positioning seat 2. The working roll clamping platform 24 is clamped in the groove of the working roll. Then, the trolley drive motor 6 is started, and the trolley drive motor 6 drives the trolley moving platform 7 to move to the position of the working roll positioning seat 2. Then, the trolley drive motor 11 is started, and the trolley drive motor 11 drives the trolley moving platform 12 to move to the position on the bearing platform 29 where the gear box inner pull plate 22 is located on the inner side of the gear box. Then the servo motor 20 is driven, and the servo motor 20 drives the bearing platform 29 to rise to support the gear box, and ensure that the axis of the gear box is in a straight line with the axis of the working roll, and then the linear drive mechanism 23 is started, and the linear drive mechanism 23 extends the inner pull plate 22 of the gear box, and the inner pull plate 22 of the gear box contacts the inner side surface of the gear box, and then the trolley drive motor 11 is started, and the trolley drive motor 11 drives the trolley moving platform 12 to move outward and then pull the gear box outward, and finally the gear box is removed from the working roll; (2) Installation steps: First, the crane adjusts the working roll of the gear box to be installed to the position of the working roll positioning seat 2, and drops the working roll on the working roll positioning seat 2, and the working roll clamping platform 24 is clamped in the groove of the working roll. Then, the gear box to be installed is hoisted to the top of the bearing platform 29 by the crane, and moved to the position where the gear box push plate 21 is located on the outer side of the gear box. Then, the trolley drive motor 6 is started, and the trolley moving support platform 7 is driven by the trolley drive motor 6 to move to the position of the working roll positioning seat 2, and then the servo motor 20 is driven. The servo motor 20 drives the support platform 29 to rise to the gear box installation position and ensures that the axis of the gear box and the axis of the working roll are in a straight line. Then, the linear drive mechanism 23 is started. The linear drive mechanism 23 extends the gear box push plate 21, and the gear box push plate 21 contacts the outer side of the gear box. Then, the trolley drive motor 11 is started. The trolley drive motor 11 drives the trolley moving support platform 12 to move inward and push the gear box inward, and finally the gear box is installed on the working roll.

[0022] Through the above-mentioned device and method, the gear box can be quickly disassembled and installed, especially because the up and down lifting mechanism includes a linear bearing 14, a guide column 15, a lifting screw 16, a rotating gear 17, a steering gear 18, a threaded sleeve 19, and a servo motor 20. The design of the up and down lifting mechanism, the steering gear 18 turns the rotating gear 17, and the lifting screw 16 is lifted and lowered in the threaded sleeve 19, which can save the distance between the bearing platform 29 and the trolley moving platform 12, making the structure more compact and the operation more convenient. At the same time, due to the provision of a gear box inner pull plate 22 and a gear box outer push plate 21, the gear box can be better pushed, ensuring the disassembly and installation effect of the gear box. Due to the adoption of the above-mentioned structure and method, the present invention has the advantages of simple structure, high disassembly and assembly efficiency, good disassembly and assembly effect, saving manpower, and protecting the bearing box.

Claims

1. A disassembly and assembly device for the working roll bearing box of an aluminum alloy cold finishing rolling mill, provided with a workbench, characterized in that The workbench is in a strip shape, and four working roller positioning seats are arranged on the strip workbench. A positioning groove is arranged above the working roller positioning seats. A forward and backward moving mechanism, a left and right moving mechanism, an up and down lifting mechanism and a bearing platform are respectively arranged on the left and right sides of the workbench. The forward and backward moving mechanism includes a trolley walking rack, a trolley driving gear, a trolley driving motor, a trolley moving support platform and a trolley walking wheel. The trolley walking rack is fixed on the ground on the left and right sides of the strip workbench, and four trolley walking wheels are respectively installed under the trolley moving support platform. The trolley walking wheels are rollingly connected to the upper end surface of the trolley walking rack. The trolley driving motor is fixedly connected to the bottom of the trolley moving support platform, and the output end of the trolley driving motor is connected to the trolley driving gear, and the trolley driving gear is connected to the trolley walking gear. The trolley driving gear is meshed with each other through the trolley driving motor to drive the trolley driving gear to rotate, thereby driving the trolley moving platform to move on the trolley walking rack. A left and right moving mechanism is installed above the trolley moving platform. The left and right moving mechanism includes a trolley walking rack, a trolley driving gear, a trolley driving motor, a trolley moving platform and a trolley walking wheel. The trolley walking rack is fixed on the trolley moving platform along the left and right directions of the trolley moving platform. Four trolley walking wheels are respectively installed below the trolley moving platform. The trolley walking wheels are rollingly connected to the upper end surface of the trolley walking rack. The trolley driving motor is fixedly connected to the bottom of the trolley moving platform. The output end of the trolley driving motor is connected to the trolley driving gear, and the trolley driving gear is meshed with the trolley walking rack. The motor drives the trolley driving gear to rotate, thereby driving the trolley moving platform to move on the trolley walking rack. An up and down lifting mechanism is installed above the trolley moving platform. The up and down lifting mechanism includes a linear bearing, a guide column, a lifting screw, a rotating gear, a steering gear, a threaded sleeve, and a servo motor. The linear bearings are respectively fixed at the four corner positions of the trolley moving platform. The lower end of the guide column is inserted into the linear bearing, and the upper end of the guide column extends out of the linear bearing and is connected to the bearing platform. The threaded sleeve is fixedly connected to the trolley moving platform, and the lower end of the lifting screw extends into the threaded sleeve and is threadedly connected to the threaded sleeve. The upper end of the lifting screw is connected to the lower end of the bearing platform, and the upper end of the threaded sleeve is rotatably connected to the rotating gear through the bearing. The center of the rotating gear A threaded hole is provided, and the rotating gear is threadedly connected with the lifting screw. A servo motor is fixed on the trolley moving platform on the side of the rotating gear, and the output end of the servo motor is connected with the steering gear. The steering gear is meshed with the rotating gear, and the steering gear drives the rotating gear to rotate and then drives the lifting and lowering of the lifting screw, and finally realizes the lifting and lowering of the bearing platform. A gear box push plate and a gear box inner pull plate are provided on the platform, and strip holes are respectively provided on the inner and outer sides of the bearing platform. A gear box inner pull plate is provided in the strip hole on the inner side of the bearing platform, and a gear box push plate is provided in the strip hole on the outer side of the bearing platform. A linear drive mechanism is fixed on the inner and outer sides of the lower end surface of the bearing platform, and the output end of the linear drive mechanism is connected with the gear box push plate and the gear box inner pull plate.The linear drive mechanism drives the gear box push plate and the gear box pull plate to extend out of the strip hole or retract into the strip hole.

2. The disassembly and assembly device of the working roll bearing box of the aluminum alloy cold finishing rolling mill according to claim 1 is characterized in that A controller is provided on the carrying platform, and the controller is connected to the trolley drive motor, the cart drive motor, the servo motor, and the linear drive mechanism respectively. The controller controls the number of revolutions of the trolley drive motor, the cart drive motor, the servo motor, and the linear drive mechanism, thereby controlling the distance the trolley moves, the distance the cart moves, the distance the servo motor rises and falls, and the distance the linear drive mechanism rises and falls.

3. The disassembly and assembly device of the working roll bearing box of the aluminum alloy cold finishing rolling mill according to claim 1 is characterized in that The positioning groove is V-shaped to ensure stable positioning of the working roll.

4. The disassembly and assembly device of the working roll bearing box of the aluminum alloy cold finishing rolling mill according to claim 1 is characterized in that A working roll clamping platform is provided on the outer side of the working roll positioning seat. The working roll clamping platform extends above the bottom of the V-shaped positioning groove. The working roll clamping platform is clamped in the groove of the working roll, and the working roll is axially positioned by the working roll clamping platform.

5. The disassembly and assembly device of the working roll bearing box of the aluminum alloy cold finishing rolling mill according to claim 1, characterized in that There are two groups of strip holes on the inner and outer sides of the bearing platform, and the two groups of strip holes are respectively provided with gear box push plates and gear box inner pull plates. The gear boxes on the two groups of working roll positioning seats can be disassembled and installed through the two groups of gear box push plates and gear box inner pull plates.

6. The disassembly and assembly device of the working roll bearing box of the aluminum alloy cold finishing rolling mill according to claim 1, characterized in that The linear drive mechanism includes a linear motor, a first gear, a second gear, and a threaded rod. The output end is connected to the first gear, the linear drive mechanism is fixed to the lower end surface of the carrying platform, the first gear is meshed with the second gear, the second gear is rotatably connected to the bottom of the carrying platform via a bearing, a threaded hole is provided in the middle of the second gear, the lower end of the inner pull plate or the outer push plate of the gear box is connected to the threaded rod, the threaded rod is connected to the threaded hole of the second gear, the first gear is driven to rotate by the linear motor and then the second gear is driven to rotate, thereby realizing the lifting and lowering of the threaded rod, realizing the lifting and lowering action of the inner pull plate or the outer push plate of the gear box.

7. A method for disassembling and assembling a working roll bearing box disassembling and assembling device of an aluminum alloy cold finishing rolling mill, characterized in that The disassembly and assembly steps are as follows: (1) Disassembly steps: First, the crane moves the working roll of the gear box to be disassembled to the working roll positioning seat position, and drops the working roll on the working roll positioning seat, and the working roll clamping table is clamped in the groove of the working roll, and then the trolley drive motor is started, and the trolley drive motor drives the trolley moving platform to move to the working roll positioning seat position, and then the trolley drive motor is started, and the trolley drive motor drives the trolley moving platform to move to the position where the gear box inner pull plate is located on the inner side of the gear box, and then the servo motor is driven, and the servo motor drives the carrying platform to rise to support the gear box and ensure that the axis of the gear box and the axis of the working roll are in a straight line, and then the linear drive mechanism is started, and the linear drive mechanism extends the gear box inner pull plate, and the gear box inner pull plate contacts the inner side of the gear box, and then the trolley drive motor is started, and the trolley drive motor drives the trolley moving platform to move outward and then pull the gear box outward, and finally remove the gear box from the working roll; (2) Installation steps: First, the crane adjusts the working roll of the gearbox to be installed to the working roll positioning seat position, and drops the working roll on the working roll positioning seat. The working roll clamping table is clamped in the groove of the working roll. Then, the gearbox to be installed is hoisted to the top of the bearing platform by the crane, and moved to the position where the gearbox push-out plate is located on the outer side of the gearbox. Then, the trolley drive motor is started, and the trolley drive motor drives the trolley moving platform to move to the working roll positioning seat position. Then, the servo motor is driven. The servo motor drives the bearing platform to rise to the gearbox installation position and ensures that the axis of the gearbox is in a straight line with the axis of the working roll. Then, the linear drive mechanism is started. The linear drive mechanism extends the gearbox push-out plate. The gearbox push-out plate contacts the outer side of the gearbox. Then, the trolley drive motor is started. The trolley drive motor drives the trolley moving platform to move inward and pushes the gearbox inward. Finally, the gearbox is installed on the working roll.

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