Timely floating support method and support structure

Abstract

This invention relates to a real-time floating support method and structure. The real-time floating support method includes fitting a support structure onto the cantilever ends of the upper and lower shear shafts of a flying shear. The support structure is positioned away from the flying shear housing. The flying shear housing, the upper and lower shear shafts, and the support structure form a closed frame structure. The shearing force on the upper and lower shear shafts is converted into internal forces in the support structure, providing real-time floating support to the cantilever ends of the upper and lower shear shafts. In this invention, the support structure floats on the cantilever ends of the shear shafts, and the shearing force on the upper and lower shear shafts is converted into internal forces in the support structure. This support structure does not occupy the material pit area and therefore does not affect the waste material discharge channel. The support structure is lightweight, saving costs and significantly reducing manufacturing and assembly difficulties.

Description

Technical Field

[0001] This invention relates to the field of steel rolling machinery and equipment, and in particular to a timely floating support method and support structure for the shear shaft of a flying shear with wide blades and large shearing force. Background Technology

[0002] Flying shears, as one of the important pieces of equipment in steel rolling mills, are mainly used to laterally shear moving rolled stock. On bar production lines, they are primarily used to cut off the heads and tails of rolled stock to ensure smooth entry into downstream mills. They also remove the poorly structured heads and tails after rolling, improving the yield of the rolled stock. In case of malfunction, the flying shears are used to break the rolled stock into smaller pieces to prevent it from entering downstream mills and damaging the equipment.

[0003] In recent years, while meeting the requirements of the new national standards, a new process has been adopted on multi-line slitting production lines: temperature-controlled rolling technology. This process aims to improve the strength of the rolled pieces and reduce the amount of alloying elements added, thereby reducing the cost per ton of steel. Once this new process technology is adopted, after the slitting rolled pieces are temperature-controlled in a water tank, a flying shear head must be used to successfully bite them into the downstream rolling mill.

[0004] Multi-slit rolling processes (referring to rolling techniques that use slitting rollers in roll passes, guide devices, or other slitting devices to cut the rolled piece longitudinally into two or more lines) can employ multi-slitting flying shears (such as... Figure 4 As shown in the figure, since multiple rolled pieces need to be cut at the same time, the shearing force of the flying shear needs to be large enough and the blade width needs to be wide enough. The blade is fixed on the flying shear holder, and the blade holder is connected to the shear shaft by a key. Therefore, the blade width directly affects the cantilever length of the shear shaft.

[0005] Figure 7a , Figure 7b This is a simplified force diagram of the upper shear shaft 91 and the lower shear shaft 92 of a flying shear during shearing of a rolled workpiece. The upper shear shaft 91 is subjected to an upward force F1, and the lower shear shaft 92 is subjected to a downward force F2. The wider the shear blade and the longer the cantilever, the greater the deformation of the shear shaft under stress. Large deformation of the shear shaft will shorten its service life. If the deformation is severe, the overlap ratio L1 of the shear blades will be reduced during shearing (e.g., ...). Figure 6 As shown, when the shearing machine is shearing the rolled workpiece, when the upper shear blade 95 and the lower shear blade 96 are in the closed position, the overlapping part of the upper and lower shear blade edges and the shear blade clearance L2 (as shown) Figure 6 As shown, when the shearing machine is shearing the rolled piece, the gap between the upper shear blade 95 and the lower shear blade 96 changes when they are in the closed position, which affects the quality of the sheared section and may even cause the rolled piece to be unable to be cut, leading to a steel pile-up accident.

[0006] like Figure 5As shown, to improve the shearing stability of the flying shear and reduce the deformation caused by the excessive length of the shear shaft cantilever, the conventional approach is to add a fixed double-support structure 94 to the cantilever end of the shear shaft to improve the stress condition of the cantilever section. Figure 8a , Figure 8b To increase the fixed double support structure 94, the upper shear shaft 91 and the lower shear shaft 92 of the flying shear are subjected to an upward force F3 and a downward force F4 when shearing the rolled workpiece.

[0007] Typically, this fixed double-support structure consists of one part welded to the original flying shear transmission housing, and the other part being a moving component connected to another support structure via bolts. This fixed double-support structure has the following drawbacks:

[0008] (1) The fixed double support structure will span the material pit area, which is used for material dropping during flying shear cutting. If there are other equipment obstructing this area, it will affect the smooth dropping of materials.

[0009] (2) The shear shaft support hole on the panel must be on the same axis as the hole of the shear shaft on the housing so that the shear shaft will not be "stuck" and bear additional force during assembly. This structure will increase the difficulty of processing and assembly.

[0010] Therefore, based on years of experience and practice in related industries, the inventor proposes a timely floating support method and support structure to meet the new process requirements of multi-line split rolling and overcome the problems existing in the prior art. Summary of the Invention

[0011] The purpose of this invention is to provide a timely floating support method and support structure. The support structure is floatingly supported on the cantilever end of the shear shaft. The shearing force on the upper and lower shear shafts of the flying shear is converted into the internal force of the support structure. This support structure does not occupy the material pit area in space, so it will not affect the waste material drop channel. The support structure is lightweight, which can save costs and greatly reduce the difficulty of manufacturing and assembly.

[0012] The objective of this invention is achieved as follows: a timely floating support method includes fitting a support structure into the cantilever ends of the upper and lower shear shafts of a flying shear. The support structure is positioned away from the flying shear housing. The flying shear housing, the upper and lower shear shafts, and the support structure form a closed frame structure. The shearing force on the upper and lower shear shafts is converted into internal forces in the support structure. The support structure provides timely floating support to the cantilever ends of the upper and lower shear shafts.

[0013] The object of the present invention can also be achieved by providing a support structure for use in the aforementioned real-time floating support method; the support structure includes a connecting rod that can be sleeved on the side wall of the upper shear shaft cantilever end and the side wall of the lower shear shaft cantilever end of the flying shear.

[0014] In a preferred embodiment of the present invention, the connecting rod is provided with a first connecting hole and a second connecting hole, the first connecting hole and the second connecting hole being respectively used to fit onto the side wall of the upper shear shaft cantilever end of the flying shear and the side wall of the lower shear shaft cantilever end of the flying shear; the center-line distance between the first connecting hole and the second connecting hole is a first distance, and the center-line distance between the upper shear shaft cantilever end and the lower shear shaft cantilever end of the flying shear is a second distance, the first distance and the second distance are set equally.

[0015] In a preferred embodiment of the present invention, a first support bearing is provided in the first connecting hole, and the inner ring of the first support bearing is sleeved on the side wall of the cantilever end of the upper shear shaft of the flying shear; a second support bearing is provided in the second connecting hole, and the inner ring of the second support bearing is sleeved on the side wall of the cantilever end of the lower shear shaft of the flying shear.

[0016] In a preferred embodiment of the present invention, the first support bearing and the second support bearing are rolling bearings.

[0017] In a preferred embodiment of the present invention, the first support bearing and the second support bearing are sliding bearings.

[0018] In a preferred embodiment of the present invention, a first spacer is provided at the first end of the first support bearing, and the two axial ends of the first spacer can axially abut against the inner ring of the first support bearing and the cantilever end of the upper shear shaft of the flying shear, respectively; a second spacer is provided at the first end of the second support bearing, and the two axial ends of the second spacer can axially abut against the inner ring of the second support bearing and the cantilever end of the lower shear shaft of the flying shear, respectively.

[0019] In a preferred embodiment of the present invention, the diameter of the end of the first spacer near the first support bearing is smaller than the diameter of the end of the first spacer away from the first support bearing; the diameter of the end of the second spacer near the second support bearing is smaller than the diameter of the end of the second spacer away from the second support bearing.

[0020] In a preferred embodiment of the present invention, a first cover plate is provided at the second end of the first support bearing, the first cover plate being used to axially position the inner ring of the first support bearing; a second cover plate is provided at the second end of the second support bearing, the second cover plate being used to axially position the inner ring of the second support bearing.

[0021] In a preferred embodiment of the present invention, the first cover plate can be connected to the upper cantilever end of the flying shear shaft by screws; the second cover plate can be connected to the lower cantilever end of the flying shear shaft by screws.

[0022] As described above, the timely floating support method and support structure of the present invention have the following beneficial effects:

[0023] In this invention, the support structure is not connected to the flying shear housing. Instead, it floats on the cantilever end of the shear shaft. The flying shear housing, the upper and lower shear shafts, and the support structure form a closed frame structure. When the flying shear shears the rolled product, the shearing forces on the upper and lower shear shafts act on the floating support structure. The shearing forces on the upper and lower shear shafts are equal in magnitude and opposite in direction. When transmitted to the support structure, they are internal forces that cancel each other out. Therefore, the floating support structure does not need to be large, as the forces acting on it cancel each other out. At the same time, this support structure does not occupy the material pit area and therefore does not affect the waste material discharge channel.

[0024] The support structure of this invention provides floating double support for the cantilever shear shaft of a flying shear, especially for multi-slit flying shears with wide blades and long cantilever shafts. The support structure improves the rigidity of the cantilever flying shear and reduces the deformation of the shear shaft during the shearing process. This effect is particularly pronounced for multi-slit flying shears, where the longer the cantilever shafts of the upper and lower shear shafts, the more significant the improvement. During the shearing process, it ensures that the overlap of the blades and the side clearance remain unchanged, ultimately guaranteeing the quality of the shear section and the stability of the shearing process. The support structure is lightweight, saving costs.

[0025] The connecting rods of the floating support structure only need to ensure that the centerline distance between the first connecting hole and the second connecting hole is equal to the centerline distance between the cantilever ends of the upper and lower shear shafts of the flying shear, which greatly reduces the difficulty of manufacturing and assembly. Attached Figure Description

[0026] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

[0027] Figure 1 : This is a schematic diagram of the working state of the real-time floating support method of the present invention.

[0028] Figure 2 : This is a schematic diagram of the connecting rod of the present invention.

[0029] Figure 3 :for Figure 2 Sectional view of AA.

[0030] Figure 4 : A schematic diagram of an existing flying shear machine that uses a multi-splitting flying shear.

[0031] Figure 5 : A schematic diagram of an existing flying shear machine using a fixed double-support structure.

[0032] Figure 6 : A schematic diagram of the overlap of the shear blades and the side clearance of the shear blades.

[0033] Figure 7a This is a simplified diagram of the forces acting on the shear shaft of a flying shear when shearing rolled workpieces in the prior art.

[0034] Figure 7b This is a simplified diagram of the forces acting on the shear shaft of a flying shear when shearing rolled workpieces in the prior art.

[0035] Figure 8a A simplified diagram showing the forces acting on the upper shear shaft of a flying shear when shearing rolled workpieces after adding a fixed double-support structure to the existing flying shear machine.

[0036] Figure 8b A simplified diagram showing the forces acting on the lower shear shaft of a flying shear when shearing rolled workpieces after adding a fixed double-support structure to the existing flying shear machine.

[0037] In the picture:

[0038] 100. Supporting structure;

[0039] 1. Connecting rod;

[0040] 11. First connecting hole; 12. Second connecting hole; 13. First support bearing; 14. Second support bearing; 15. First spacer; 16. Second spacer; 17. First cover plate; 18. Second cover plate; 19. Screw;

[0041] 91. Upper shear shaft of the flying shear; 92. Lower shear shaft of the flying shear; 93. Flying shear housing; 94. Fixed double support structure; 95. Upper shear blade; 96. Lower shear blade. Detailed Implementation

[0042] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0043] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, all of which should be considered within the scope of the invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "linked" should be interpreted broadly; for example, they can refer to mechanical or electrical connections, or internal communication between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] This invention provides a timely floating support method, including, as follows: Figure 1 As shown, a support structure 100 is fitted into the cantilever ends of the upper and lower shear shafts of the flying shear (existing technology). Similar to the prior art, the end of the upper shear shaft 91 furthest from the flying shear housing 93 (existing technology) is the upper shear shaft cantilever end, and the end of the lower shear shaft 92 furthest from the flying shear housing 93 (existing technology) is the lower shear shaft cantilever end. The support structure 100 is positioned away from the flying shear housing 93. The flying shear housing 93, the upper shear shaft 91, the lower shear shaft 92, and the support structure 100 form a closed frame structure. The shearing force borne by the upper and lower shear shafts is converted into internal forces in the support structure 100. The support structure 100 provides timely floating support to the cantilever ends of the upper and lower shear shafts. The internal force F on the support structure 100 is as follows: Figure 1 As shown.

[0046] Unlike the fixed double-support structure of existing technologies, the support structure 100 used in this invention is not connected to the flying shear housing 93. The support structure 100 is floatingly supported on the cantilever end of the shear shaft. The flying shear housing 93, the upper flying shear shaft 91, the lower flying shear shaft 92, and the support structure 100 form a closed frame structure. When the flying shear shears the rolled workpiece, the shearing forces on the upper and lower flying shear shafts act on the floating support structure. The shearing forces on the upper and lower flying shear shafts are equal in magnitude and opposite in direction. When transmitted to the support structure 100, they are internal forces that cancel each other out. Therefore, the floating support structure 100 does not need to be large, as the forces acting on it cancel each other out. Simultaneously, this support structure 100 does not occupy the material pit area, thus not affecting the waste material discharge channel.

[0047] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention also provides a support structure 100 for use in the aforementioned real-time floating support method; the support structure 100 includes a connecting rod 1 that can be sleeved on the side wall of the upper shear shaft cantilever end and the side wall of the lower shear shaft cantilever end of the flying shear.

[0048] The support structure of this invention provides floating double supports for the cantilever shear shaft of a flying shear machine, particularly for multi-slice flying shears with wide blades and long cantilever shafts. The support structure consists of 100 floating supports at the cantilever ends of the shear shaft, without being connected to the flying shear housing 93. This improves the rigidity of the cantilever flying shear and reduces the deformation of the shear shaft during the shearing process. The effect is particularly pronounced for multi-slice flying shears, where the longer the cantilever of the upper and lower shear shafts, the more significant the effect. During the shearing process, it ensures that the overlap of the blades and the side clearance remain unchanged, ultimately guaranteeing the quality of the shear section and the stability of the shearing process. The support structure is lightweight, saving costs.

[0049] Furthermore, such as Figure 2 , Figure 3 As shown, the connecting rod 1 is provided with a first connecting hole 11 and a second connecting hole 12. The first connecting hole 11 and the second connecting hole 12 are respectively used to fit onto the side wall of the upper and lower cantilever ends of the flying shear shaft. The center-line distance between the first connecting hole 11 and the second connecting hole 12 is a first distance, and the center-line distance between the upper and lower cantilever ends of the flying shear shaft is a second distance. The first distance and the second distance are set equally. The connecting rod 1 is a perforated plate that resembles "eyeglasses".

[0050] The connecting rod 1 of the floating support structure can be manufactured and assembled as long as the centerline distance between the first connecting hole 11 and the second connecting hole 12 is equal to the centerline distance between the cantilever end of the upper shear shaft and the cantilever end of the lower shear shaft.

[0051] Furthermore, such as Figure 1As shown, a first support bearing 13 is provided in the first connecting hole 11, and the inner ring of the first support bearing 13 is sleeved on the side wall of the cantilever end of the upper shear shaft of the flying shear; a second support bearing 14 is provided in the second connecting hole 12, and the inner ring of the second support bearing 14 is sleeved on the side wall of the cantilever end of the lower shear shaft of the flying shear.

[0052] In this embodiment, the first support bearing 13 and the second support bearing 14 are rolling bearings.

[0053] When the shearing speed of the flying shear is not high, the first support bearing 13 and the second support bearing 14 can be sliding bearings.

[0054] During the shearing process, a connecting rod 1 resembling "eyeglasses" and a set of support bearings (first support bearing 13 and second support bearing 14) form a double support structure, which converts the shearing force borne by the upper shear shaft 91 and the lower shear shaft 92 of the flying shear into the internal force of the support structure (equal in magnitude and opposite in direction), thereby improving the rigidity and shearing stability of the cantilever structure flying shear.

[0055] Furthermore, such as Figure 1 As shown, a first spacer 15 is provided at the first end of the first support bearing 13, and the two axial ends of the first spacer 15 can axially abut against the inner ring of the first support bearing and the cantilever end of the upper shear shaft of the flying shear, respectively; a second spacer 16 is provided at the first end of the second support bearing 14, and the two axial ends of the second spacer 16 can axially abut against the inner ring of the second support bearing and the cantilever end of the lower shear shaft of the flying shear, respectively.

[0056] In this embodiment, the diameter of the end of the first spacer 15 near the first support bearing is smaller than the diameter of the end of the first spacer away from the first support bearing; the diameter of the end of the second spacer 16 near the second support bearing is smaller than the diameter of the end of the second spacer away from the second support bearing.

[0057] Furthermore, such as Figure 1 As shown, a first cover plate 17 is provided at the second end of the first support bearing 13, and the first cover plate 17 is used to axially position the inner ring of the first support bearing; a second cover plate 18 is provided at the second end of the second support bearing 14, and the second cover plate 18 is used to axially position the inner ring of the second support bearing.

[0058] like Figure 1 As shown, in this embodiment, the first cover plate 17 can be connected to the upper shear shaft cantilever end of the flying shear by screws 19; the second cover plate 18 can be connected to the lower shear shaft cantilever end of the flying shear by screws.

[0059] As described above, the timely floating support method and support structure of the present invention have the following beneficial effects:

[0060] In this invention, the support structure is not connected to the flying shear housing. Instead, it floats on the cantilever end of the shear shaft. The flying shear housing, the upper and lower shear shafts, and the support structure form a closed frame structure. When the flying shear shears the rolled product, the shearing forces on the upper and lower shear shafts act on the floating support structure. The shearing forces on the upper and lower shear shafts are equal in magnitude and opposite in direction. When transmitted to the support structure, they are internal forces that cancel each other out. Therefore, the floating support structure does not need to be large, as the forces acting on it cancel each other out. At the same time, this support structure does not occupy the material pit area and therefore does not affect the waste material discharge channel.

[0061] The support structure of this invention provides floating double support for the cantilever shear shaft of a flying shear, especially for multi-slit flying shears with wide blades and long cantilever shafts. The support structure improves the rigidity of the cantilever flying shear and reduces the deformation of the shear shaft during the shearing process. This effect is particularly pronounced for multi-slit flying shears, where the longer the cantilever shafts of the upper and lower shear shafts, the more significant the improvement. During the shearing process, it ensures that the overlap of the blades and the side clearance remain unchanged, ultimately guaranteeing the quality of the shear section and the stability of the shearing process. The support structure is lightweight, saving costs.

[0062] The connecting rods of the floating support structure only need to ensure that the centerline distance between the first connecting hole and the second connecting hole is equal to the centerline distance between the cantilever ends of the upper and lower shear shafts of the flying shear, which greatly reduces the difficulty of manufacturing and assembly.

[0063] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A timely floating support method, characterized in that, The invention includes a support structure fitted onto the cantilever ends of the upper and lower shear shafts of the flying shear. The support structure is positioned away from the flying shear housing. The flying shear housing, the upper and lower shear shafts, and the support structure form a closed frame structure. The shearing force on the upper and lower shear shafts is converted into internal forces in the support structure. The support structure provides timely floating support to the cantilever ends of the upper and lower shear shafts. The support structure includes connecting rods that can be fitted onto the side walls of the cantilever ends of the upper and lower shear shafts.

2. A support structure, characterized in that, Used in the real-time floating support method as described in claim 1; the support structure includes a connecting rod that can be sleeved on the side wall of the upper shear shaft cantilever end of the flying shear and the side wall of the lower shear shaft cantilever end of the flying shear. The connecting rod is provided with a first connecting hole and a second connecting hole. The first connecting hole and the second connecting hole are respectively used to fit onto the side wall of the upper shear shaft cantilever end and the side wall of the lower shear shaft cantilever end of the flying shear. The center-line distance between the first connecting hole and the second connecting hole is a first distance, and the center-line distance between the upper and lower shear shaft cantilever ends of the flying shear is a second distance. The first distance and the second distance are set to be equal.

3. The support structure as described in claim 2, characterized in that, A first support bearing is provided in the first connecting hole, and the inner ring of the first support bearing is sleeved on the side wall of the cantilever end of the upper shear shaft of the flying shear; a second support bearing is provided in the second connecting hole, and the inner ring of the second support bearing is sleeved on the side wall of the cantilever end of the lower shear shaft of the flying shear.

4. The support structure as described in claim 3, characterized in that, The first support bearing and the second support bearing are rolling bearings.

5. The support structure as described in claim 3, characterized in that, The first support bearing and the second support bearing are sliding bearings.

6. The support structure as described in claim 3, characterized in that, The first end of the first support bearing is provided with a first spacer ring, and the two axial ends of the first spacer ring can axially abut against the inner ring of the first support bearing and the cantilever end of the upper shear shaft of the flying shear, respectively; the first end of the second support bearing is provided with a second spacer ring, and the two axial ends of the second spacer ring can axially abut against the inner ring of the second support bearing and the cantilever end of the lower shear shaft of the flying shear, respectively.

7. The support structure as described in claim 6, characterized in that, The diameter of the end of the first spacer closest to the first support bearing is smaller than the diameter of the end of the first spacer furthest from the first support bearing; the diameter of the end of the second spacer closest to the second support bearing is smaller than the diameter of the end of the second spacer furthest from the second support bearing.

8. The support structure as described in claim 3, characterized in that, A first cover plate is provided at the second end of the first support bearing, and the first cover plate is used to axially position the inner ring of the first support bearing; a second cover plate is provided at the second end of the second support bearing, and the second cover plate is used to axially position the inner ring of the second support bearing.

9. The support structure as described in claim 8, characterized in that, The first cover plate can be connected to the upper cantilever end of the flying shear shaft by screws; the second cover plate can be connected to the lower cantilever end of the flying shear shaft by screws.

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