A method for replacing disc springs in a straightening machine

Abstract

This invention provides a method for replacing disc springs in a straightening machine. A lifting device is used to lift the lifting frame, moving it upwards along the column until the disc springs on the column are relaxed and a certain distance away from the lower surface of the lifting frame. Then, using disc spring clips and ropes, the disc springs on the column are moved upwards along the column, passing through the column's mounting hole until they disengage from the column, thus replacing the disc springs. Compared to replacing disc springs in a straightening machine using a crawler crane, this invention only uses an economical, lightweight, and easy-to-operate lifting device to lift the lifting frame upwards a certain distance, rather than removing the lifting frame from the column. This eliminates the cumbersome work of clearing construction space for a large crawler crane and reduces the difficulty of reinstalling the straightening machine after disc spring replacement. This invention saves significant manpower, material resources, and time, and has excellent performance characteristics of convenient construction, speed, efficiency, and economic applicability.

Description

Technical Field

[0001] This invention belongs to the field of steel rolling machinery technology, and in particular relates to a method for replacing disc springs in a straightening machine. Background Technology

[0002] Straightening machines are widely used on medium and heavy plate rolling lines to eliminate plate bending that occurs during the rolling process. They are key equipment for improving the flatness of steel plates and eliminating residual stress. Figure 1 As shown, the straightening machine for straightening steel plates mainly includes an upper roller system 1 and a lower roller system 2. The upper roller system 1 is fixed on the lower surface of the lifting frame 3. The lifting frame 3 is sleeved on the column 4. A disc spring 5 is sleeved below the lifting frame 3 on the column 4. The upper part of the lifting frame 3 on the column 4 meshes with a worm gear box 6 for transmission. The worm gear box 6 is fixed on the lifting frame 3. The lower roller system 2 is fixed on the bottom base frame 7. When adjusting the roller gap, the worm gear box 6 is driven to move downward along the column 4, and the lifting frame 3 is driven to move downward along the column 4 against the elastic force of the disc spring 5, until the gap between the pressure rollers of the upper roller system 1 and the lower roller system 2 on the lifting frame 3 reaches the thickness requirement of the steel plate to be processed. After long-term use of the above-mentioned straightening machine to straighten steel plates, especially in the high-heat and high-humidity working environment, the disc spring 5, a key component used for adjusting the roller gap of the straightening machine, will be worn to varying degrees, which will seriously affect the adjustment accuracy of the roller gap of the straightening machine and ultimately affect the straightening quality of the steel plate. Therefore, the disc spring 5 needs to be replaced regularly.

[0003] However, the lifting frame 3 on top of the straightening machine weighs 62T, while the overhead crane above the steel plate rolling line has a rated load of 20T. The overhead crane cannot meet the lifting requirements when replacing the disc spring 5. Therefore, in the existing technology, a crawler crane (with a rated load of up to 500T) is generally used to replace the disc spring 5. First, all obstacles next to the steel plate rolling line where the straightening machine is located, such as steel coils along the steel coil warehouse and the line walls along the steel coil warehouse, need to be cleared and removed to make room for the crawler crane to enter and work. Then, the worm gear box 6 above the lifting frame 3 is removed from the lifting frame 3 and the column 4. After that, the lifting frame 3 is lifted off the column 4 by the crawler crane. Finally, scaffolding is erected, and the disc spring 5 on the column 4 is replaced using the platform formed by the scaffolding. Then, the straightening machine is reinstalled by reversing the above steps. The above-mentioned construction work, which involves replacing the disc spring 5 of the straightening machine using a crawler crane, requires 12 people and 15 days to complete. This requires a significant investment of manpower, resources, and time, and seriously affects the production and processing progress of the steel plate. Summary of the Invention

[0004] In view of this, the present invention aims to provide a method for replacing disc springs in a straightening machine, so as to solve the technical problems of high cost and low efficiency in replacing disc springs in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for replacing disc springs in a straightening machine, the method comprising:

[0007] S1: Remove the worm gear box above the lifting frame, and remove the upper and lower roller systems between the lifting frame and the bottom base frame;

[0008] S2: Fix the lifting device to the bottom base frame, the lifting device being located below the lifting frame;

[0009] S3: Activate the lifting device to lift the lifting frame, so that the lifting frame moves upward along the column until the disc spring on the column is relaxed and a certain distance away from the lower surface of the lifting frame.

[0010] S4: Remove the disc spring clamping ring that is fixed on the lower surface of the lifting frame at the position corresponding to the column sleeve hole;

[0011] S5: Use the disc spring claws to clamp the topmost disc spring on the column;

[0012] S6: Extend the rope downwards from the top of the lifting frame along the column socket and fix the extended end of the rope to the disc spring claw;

[0013] S7: Pull the rope upwards, and through the disc spring claw, drive the clamped disc spring to move upwards along the column, through the column sleeve hole of the lifting frame, until it is released from the column;

[0014] Repeat steps S5-S7 until all the disc springs on the column are dislodged from the column.

[0015] Furthermore, the lifting device is a jack.

[0016] Furthermore, the lifting device also includes a lifting support. In this case, step S2 is: fixing the lifting support to the bottom base frame, and installing a jack on the top of the lifting support, with the jack located below the lifting frame.

[0017] Furthermore, the jack is preferably a hydraulic jack.

[0018] Furthermore, there are multiple lifting devices. In step S2, the multiple lifting devices are evenly distributed on the bottom base frame below the lifting frame, and in step S3, the multiple lifting devices are started synchronously.

[0019] Furthermore, in step S4, the disc spring clamping ring is composed of a pair of Haver ring plates. The outer diameter of the disc spring clamping ring is larger than the diameter of the column sleeve hole of the lifting frame, and the inner diameter of the disc spring clamping ring is smaller than the diameter of the column sleeve hole and smaller than the outer diameter of the disc spring.

[0020] Furthermore, in step S5, the disc spring claw includes a slot and a traction part. The slot is an arc-shaped part with a "C"-shaped cross-section, and the traction part is a traction rod or hanging ring fixed to the upper surface of the slot.

[0021] Furthermore, the rope mentioned in step S6 is preferably a steel wire rope.

[0022] Furthermore, the straightening machine also includes a thrust self-aligning bearing, the seat ring of which is fixedly connected to the column sleeve hole of the lifting frame, and the moving ring of which is fixedly connected to the worm wheel of the worm gear box. At this time, step S1 also includes: removing the thrust self-aligning bearing.

[0023] Furthermore, the straightening machine also includes a reinforcing beam, which is fixed to the top of the adjacent column. Before step S1, the process further includes removing the reinforcing beam from the top of the column.

[0024] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a method for replacing disc springs in a straightening machine. The method uses a lifting device to lift the lifting frame, causing the lifting frame to move upward along the column until the disc spring on the column is in a relaxed state and is separated from the lower surface of the lifting frame by a certain distance to provide construction conditions for disc spring replacement; then, the disc spring is driven by the disc spring claw and rope to move upward along the column, pass through the column sleeve hole of the lifting frame, and until it is dislodged from the column, thereby realizing the replacement of the disc spring of the straightening machine. Compared to replacing the disc springs of a straightening machine using a crawler crane, the method for replacing the disc springs of a straightening machine according to this invention replaces the expensive, bulky, and complex lifting operation of a crawler crane by using an economical, lightweight, and easy-to-operate jacking device to move the lifting frame upwards along the column a certain distance. This eliminates the tedious work of clearing obstacles to make room for the crawler crane's operation and operation, and also reduces the difficulty of reinstalling the straightening machine after the disc spring replacement. Furthermore, the jacking device is more economical, lightweight, and easier to operate than a crawler crane, thus saving a significant amount of manpower, material resources, and time. This solves the technical problems of high cost and low efficiency in the replacement of disc springs of straightening machines in existing technologies. Therefore, the method for replacing the disc springs of a straightening machine provided by this invention has excellent performance characteristics of convenient construction, speed, efficiency, and economic applicability. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the straightening machine of the present invention;

[0026] Figure 2 This is a schematic diagram of the planar structure of the straightening machine of the present invention;

[0027] Figure 3 This is a schematic diagram of the disc spring compression ring;

[0028] Figure 4 This is a schematic diagram of the operation of the lifting frame;

[0029] Figure 5 This is a schematic diagram of the process for replacing a disc spring;

[0030] Figure 6 This is a schematic diagram of the disc spring chuck;

[0031] Figure 7 This is a schematic diagram of the planar structure of the straightening machine of the present invention, which includes a thrust self-aligning bearing.

[0032] The annotations in the attached figures are explained as follows:

[0033] 1 Upper roller system

[0034] 2 Lower roller system

[0035] 3. Lifting frame

[0036] 3-1 Column socket

[0037] 3-2 Disc Spring Compression Ring

[0038] 3-2-1 Haval Ring Plate

[0039] 4 pillars

[0040] 5 Disc Springs

[0041] 6. Worm Gearbox

[0042] 7. Bottom frame

[0043] 8 Disc spring clasps

[0044] 8-1 Card slot section

[0045] 8-2 Traction Unit

[0046] 9 Lifting device

[0047] 9-1 Top Support

[0048] 10 Thrust self-aligning bearing

[0049] 11. Reinforced Beams Detailed Implementation

[0050] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the following embodiments are only used to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0051] This invention provides a method for replacing disc springs in a straightening machine, aiming to solve the technical problems of high cost and low efficiency in replacing disc springs in existing straightening machines. It offers excellent performance in terms of convenient construction, speed, efficiency, and cost-effectiveness. Figure 1-2As shown, the straightening machine includes an upper roller system 1 and a lower roller system 2 correspondingly disposed below the upper roller system 1. The upper roller system 1 is fixed on the lower surface of the lifting frame 3. The lifting frame 3 is sleeved on the column 4 through a column sleeve hole 3-1. A disc spring 5 is sleeved below the lifting frame 3 on the column 4. The upper part of the lifting frame 3 on the column 4 meshes with a worm gear box 6 for transmission. The worm gear box 6 is fixed on the lifting frame 3. The lower roller system 2 is fixed on the bottom base frame 7. A disc spring clamping ring 3-2 is also fixed on the lower surface of the lifting frame 3 at the position corresponding to the column sleeve hole 3-1, to restrict the disc spring 5 between the column 4 and the lifting frame 3. Optionally, as shown... Figure 3 As shown, the disc spring clamping ring 3-2 consists of a pair of Haver ring plates 3-2-1. The Haver ring plates 3-2-1 can be fixed to the lower surface of the lifting frame 3 by means of bolts or screws. The outer diameter of the disc spring clamping ring 3-2 is larger than the diameter of the column sleeve hole 3-1 of the lifting frame 3, and the inner diameter of the disc spring clamping ring 3-2 is smaller than the diameter of the column sleeve hole 3-1 and smaller than the outer diameter of the disc spring 5. When adjusting the roller gap of the straightening machine, the drive worm gear box 6 moves downward along the column 4, and drives the lifting frame 3 to overcome the elastic force of the disc spring 5 and move downward along the column 4 until the gap between the upper roller system 1 and the lower roller system 2 on the lifting frame 3 reaches the thickness requirement of the steel plate to be processed. Specifically, the drive worm gear box 6 generally includes a worm wheel and a worm meshing with the worm wheel. The worm wheel is sleeved on the column 5 and threadedly connected to the column 5. Thus, by rotating the worm, the drive worm gear box 6 can be moved up and down along the column 4, and the lifting frame 3 fixedly connected to the worm gear box 6 and the upper roller system 1 fixed on the lifting frame 3 can be moved up and down. The worm is preferably driven by a motor.

[0052] like Figure 4-5 As shown, when periodically replacing the disc springs 5 ​​of the aforementioned straightening machine, this invention replaces the existing technology that uses an expensive, bulky, and complex crawler crane to lift the lifting frame 3 from the column 4. Instead, it uses an economical, lightweight, and easy-to-operate lifting device 9 to drive the lifting frame 3 upward along the column 4 a certain distance to provide construction conditions for disc spring replacement. Then, the disc spring pawl 8 and ropes drive the disc spring 5 on the column 4 upward along the column 4 until it detaches from the column 4. Thus, the disc springs of the straightening machine can be replaced through a simple operation. The straightening machine replacement method of this invention specifically includes the following steps:

[0053] S1: Remove the worm gear box 6 above the lifting frame 3, and remove the upper roller system 1 and lower roller system 2 between the lifting frame 3 and the bottom base frame 7;

[0054] S2: Fix the lifting device 9 to the bottom base frame 7, wherein the lifting device 9 is located below the lifting frame 3;

[0055] S3: Activate the lifting device 9 to lift the lifting frame 3, so that the lifting frame 3 moves upward along the column 4 until the disc spring 5 on the column 4 is in a relaxed state and is separated from the lower surface of the lifting frame 3 by a certain distance d; the distance d is preferably 200mm, so as to provide construction conditions for subsequent steps, such as providing operating space for removing the disc spring clamping ring 3-2 in step S4, and providing operating space for the disc spring claw 8 to clamp the disc spring 5 in step S5;

[0056] S4: Remove the disc spring clamping ring 3-2 that is fixed on the lower surface of the lifting frame 3 at the position corresponding to the column sleeve hole 3-1;

[0057] S5: Use the disc spring claw 8 to clamp the uppermost disc spring 5 on the column 4;

[0058] S6: Extend a rope downward from above the lifting frame 3 along the column sleeve hole 3-1, and fix the extended end of the rope to the disc spring claw 8; the rope is preferably a steel wire rope.

[0059] S7: Pull the rope upwards, and through the disc spring claw 8, drive the clamped disc spring 5 to move upwards along the column 4, pass through the column sleeve hole 3-1 of the lifting frame 3, until it is dislodged from the column 4.

[0060] Repeat steps S5-S7 until all disc springs 5 ​​on column 4 are dislodged from column 4.

[0061] Compared with the prior art of replacing disc springs in a straightening machine using a crawler crane, the method of replacing disc springs in this invention only uses an economical, lightweight, and easy-to-operate lifting device 9 to lift the lifting frame 3, so that the lifting frame 3 moves upward along the column 4 until the disc spring 5 on the column 4 is in a relaxed state and is a certain distance away from the lower surface of the lifting frame 3 to provide construction conditions for disc spring replacement, rather than removing the lifting frame 3 from the column 4. This saves the complicated process of reinstalling the lifting frame 3 on the column 4 when reinstalling the straightening machine after the disc spring is replaced, reducing the difficulty of reinstalling the straightening machine. It also saves the tedious work of clearing obstacles in advance to make room for the crawler crane to lift and install the machine. In addition, the lifting device 9 is more economical, lightweight, and easier to operate than the crawler crane itself. This invention saves a lot of manpower, material resources, and time, and solves the technical problems of high cost and low efficiency in the replacement of disc springs in straightening machines in the prior art. It has excellent performance in terms of convenient construction, speed and efficiency, and economic applicability.

[0062] Furthermore, after all the disc springs 5 ​​on the column 4 are removed from the column 4, the process also includes reversing the above steps to install new disc springs on the column 4 and completing the reassembly of the straightening machine.

[0063] Furthermore, there are multiple lifting devices 9, preferably four. In step S2, the multiple lifting devices 9 are evenly distributed on the bottom base frame 7 below the lifting frame 3. In step S3, the multiple lifting devices 9 are simultaneously activated to lift the lifting frame 3, so as to make the lifting frame 3 evenly stressed and prevent the lifting frame 3 from tilting and getting stuck during movement. In addition, setting multiple lifting devices 9 can also improve the lifting capacity of the lifting frame 3. Specifically, the lifting device 9 is a jack, preferably a hydraulic jack; optionally, the lifting device 9 also includes a lifting support 9-1, which is used to support the jack to lift the height of the jack, and finally break the limitation of the lifting height of the jack itself, increasing the lifting range of the lifting device 9. At this time, step S2 is: fixing the lifting support 9-1 on the bottom base frame 7, and setting the jack on the top of the lifting support 9-1, the jack being located below the lifting frame 3.

[0064] Furthermore, such as Figure 6 As shown, in step S5, the disc spring claw 8 includes a slot portion 8-1 and a traction portion 8-2. The slot portion 8-1 is an arc-shaped part with a "C"-shaped cross-section. The slot portion 8-1 can clamp multiple disc springs 5 ​​at one time, preferably two disc springs 5 ​​at one time. Specifically, the size of the "C"-shaped notch of the slot portion 8-1 can be adjusted according to the different number of disc springs to be clamped in the actual application. The traction portion 8-2 is a traction rod or hanging ring fixed to the upper surface of the slot portion 8-1. Preferably, two traction portions 8-2 are provided, or preferably, they are designed as hanging rings that facilitate rope connection. Optionally, there are multiple disc spring claws 8, preferably two. When multiple disc spring claws 8 clamp the disc springs 5 ​​in step S5, they are evenly distributed on the disc springs 5 ​​to ensure that the disc springs 5 ​​are subjected to uniform force and to prevent the disc springs 5 ​​from tilting and jamming during movement.

[0065] Optionally, such as Figure 1-2 As shown, the above-mentioned straightening machine also includes a reinforcing beam 11, which is fixed to the top of the adjacent column 4. This reinforcing beam 11 is used to strengthen the overall stability of the straightening machine and to limit the movement of the worm gear box 6 along the column 4. Before step S1, the process further includes removing the reinforcing beam 11 from the top of the column 4. Optionally, as... Figure 7 As shown, the above-mentioned straightening machine also includes a thrust self-aligning bearing 10. The seat ring of the thrust self-aligning bearing 10 is fixedly connected to the column sleeve hole 3-1 of the lifting frame 3, and the moving ring of the thrust self-aligning bearing 10 is fixedly connected to the worm wheel of the worm gear box 6. The thrust self-aligning bearing 10 is used to ensure the coaxiality of the column sleeve hole 3-1 of the lifting frame 3 and the column 4, and to prevent the lifting frame 3 sleeved on the column 4 from tilting and affecting the roller gap adjustment accuracy. At this time, step S1 also includes: removing the thrust self-aligning bearing 10; the thrust self-aligning bearing 10 is preferably a thrust self-aligning roller bearing.

[0066] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. It should be noted that all modifications or equivalent substitutions made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method of replacing a disc spring of a straightener, characterized by, The method includes: S1: Remove the worm gear box above the lifting frame, and remove the upper and lower roller systems between the lifting frame and the bottom base frame; S2: Fix the lifting device to the bottom base frame, the lifting device being located below the lifting frame; S3: Activate the lifting device to lift the lifting frame, so that the lifting frame moves upward along the column until the disc spring on the column is relaxed and a certain distance away from the lower surface of the lifting frame. S4: Remove the disc spring clamping ring that is fixed on the lower surface of the lifting frame at the position corresponding to the column sleeve hole; S5: Use the disc spring claws to clamp the topmost disc spring on the column; S6: Extend the rope downwards from the top of the lifting frame along the column socket and fix the extended end of the rope to the disc spring claw; S7: Pull the rope upwards, and through the disc spring claw, drive the clamped disc spring to move upwards along the column, through the column sleeve hole of the lifting frame, until it is released from the column; Repeat steps S5-S7 until all the disc springs on the column are dislodged from the column.

2. The method of claim 1, wherein, The lifting device is a jack.

3. The method of claim 2, wherein, The lifting device also includes a lifting support. In this case, step S2 is to fix the lifting support on the bottom base frame and install a jack on the top of the lifting support, with the jack located below the lifting frame.

4. The method of claim 3, wherein, The jack is a hydraulic jack.

5. The method of claim 1-4, wherein, There are multiple lifting devices. In step S2, the multiple lifting devices are evenly distributed on the bottom base frame below the lifting frame. In step S3, the multiple lifting devices are started synchronously.

6. The method of claim 1, wherein, In step S4, the disc spring clamping ring is composed of a pair of Haver ring plates. The outer diameter of the disc spring clamping ring is larger than the diameter of the column sleeve hole of the lifting frame, and the inner diameter of the disc spring clamping ring is smaller than the diameter of the column sleeve hole and smaller than the outer diameter of the disc spring.

7. The method of claim 1, wherein, In step S5, the disc spring claw includes a slot and a traction part. The slot is an arc-shaped part with a "C"-shaped cross-section, and the traction part is a traction rod or hanging ring fixed to the upper surface of the slot.

8. The method of claim 1, wherein, The rope mentioned in step S6 is a steel wire rope.

9. The method for replacing the disc spring of a straightening machine according to claim 1, characterized in that, The straightening machine also includes a thrust self-aligning bearing. The seat ring of the thrust self-aligning bearing is fixedly connected to the column sleeve hole of the lifting frame, and the moving ring of the thrust self-aligning bearing is fixedly connected to the worm wheel of the worm gear box. At this time, step S1 also includes: removing the thrust self-aligning bearing.

10. The method for replacing the disc spring of a straightening machine according to claim 1 or 9, characterized in that, The straightening machine also includes a reinforcing beam, which is fixed to the top of the adjacent column. Before step S1, the process also includes removing the reinforcing beam at the top of the column.

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