Two-roller working roll flattening device

Abstract

This utility model relates to a double-roll work roll leveling device, comprising a leveling machine frame, within which are upper and lower support rollers spaced vertically and adjustable in height. The upper and lower support rollers can switchably support either a large-diameter work roll system for leveling ordinary steel or a small-diameter work roll system for leveling special steel. A lifting drive mechanism is located at the bottom of the leveling machine frame to press and tighten the lower support roller, thereby aligning it with the support of both the large-diameter and small-diameter work roll systems. This utility model achieves the process requirement of leveling and rolling different types of work rolls within the same frame, saving investment costs and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of cold rolling technology of strip steel, and in particular to a double-roll system work roll leveling device. Background Technology

[0002] In recent years, the cold-rolled strip steel market has shifted from a supply shortage to overcapacity. Transforming technologies and products will be crucial for the survival of enterprises; therefore, the rational and efficient configuration of subsequent leveling processes has become increasingly important.

[0003] Leveling rolling is the final key process to ensure the quality of cold-rolled strip steel products. Currently, single-stand four-roll leveling machines are commonly used for cold-rolled strip steel with low elongation. The total deformation of the leveling process is very limited, generally below 3%, and its ability to correct strip shape problems is very limited.

[0004] To improve the surface quality, flatness, and thickness accuracy of leveled products, it was found during the processing of high-strength steel and special steel using traditional leveling equipment that ordinary leveling machines cannot meet the requirements for residual stress levels and product performance stability in high-strength steel. Currently, the lack of specialized leveling equipment for high-strength steel processing technology hinders the production and quality improvement of high-strength steel products.

[0005] Currently, leveling mills are widely used in the cold rolling of strip steel. In particular, four-roll leveling mills have significant advantages in rolling capacity, strip shape control, production cost, and production efficiency. Their applications have gradually expanded from ordinary carbon steel and low-alloy structural steel to special steels such as high-strength steel. To meet the process requirements of leveling and rolling high-strength steel, it is necessary to design leveling equipment with a large reduction capacity that can level ordinary cold-rolled strip steel as well as high-strength steel and special steel.

[0006] like Figure 3As shown, a conventional single-stand leveling mill is mainly used for leveling cold-rolled coils annealed in a bell-type annealing furnace or a continuous cold-rolling annealing mill. This leveling mill typically uses only one type of work roll system, generally employing work rolls with a diameter of 450-550mm for leveling rolling. With wet leveling rolling, the maximum elongation achievable by the leveling mill is 3%. During production, depending on product requirements, some special steels require a large reduction to meet customer requirements for post-annealing reduction strengthening. This necessitates the configuration of leveling equipment specifically designed for high-strength steel. If producing leveled products with a large reduction (typically requiring a reduction rate of over 10%), or producing high-strength steel or special steel, the large-diameter work rolls within the stand cannot meet the leveling requirements for high-strength steel and should be replaced with smaller diameter rolls. This is because this structure can only accommodate one type of work roll. Therefore, the design of this leveling equipment makes it impossible to use the small-diameter work rollers required for leveling equipment with large reduction, which greatly affects the leveling of high-strength steel and special steel.

[0007] like Figure 4 As shown, considering the process requirements of large reduction volume, a double-stand leveling machine is selected. This structure can operate in both double-stand and single-stand modes. However, this leveling equipment configuration has an additional complete leveling machine body, transmission, and roller changing mechanism compared to a conventional single-stand leveling unit. As a result, this solution has higher initial investment costs and requires more production and maintenance compared to single-stand leveling.

[0008] Therefore, based on years of experience and practice in related industries, the inventor proposes a double-roller work roll leveling device to overcome the shortcomings of existing technologies. Utility Model Content

[0009] The purpose of this invention is to provide a dual-roll system work roll leveling equipment that can use both a large work roll system and a small work roll system when there are special leveling machine process requirements in the same frame. It facilitates the switching of different work roll types and meets the process requirements of leveling and rolling different types of work rolls in the same frame, thereby saving investment costs and improving production efficiency.

[0010] The purpose of this utility model is achieved as follows: a double-roller work roll leveling device includes a leveling machine frame. An upper support roller and a lower support roller are arranged within the leveling machine frame, spaced vertically and adjustable in height. The upper support roller and the lower support roller can switchably support a large-diameter work roll system for leveling ordinary steel or a small-diameter work roll system for leveling special steel. A lifting drive mechanism is provided at the bottom of the leveling machine frame to press and tighten the lower support roller, thereby matching and supporting both the large-diameter work roll system and the small-diameter work roll system.

[0011] In a preferred embodiment of the present invention, the dual-roller work roll leveling equipment includes a work roll changing device that can accommodate both the large-diameter work roll system and the small-diameter work roll system.

[0012] In a preferred embodiment of the present invention, the dual-roller work roll leveling device includes an emulsion spraying device that matches the small-diameter work roll system.

[0013] In a preferred embodiment of the present invention, the dual-roller work roll leveling device includes a first transmission structure that matches the small-diameter work roll system.

[0014] In a preferred embodiment of the present invention, the small-diameter working roller system includes a pair of small-diameter working rollers, the diameter of which is 330-360 mm.

[0015] In a preferred embodiment of the present invention, the dual-roller work roll leveling equipment includes a leveling liquid spraying device that matches the large-diameter work roll system.

[0016] In a preferred embodiment of the present invention, the dual-roller work roll leveling device includes a second transmission structure that matches the large-diameter work roll system.

[0017] In a preferred embodiment of the present invention, the large-diameter work roller system includes a pair of large-diameter work rollers, the diameter of which is 450-550 mm.

[0018] In a preferred embodiment of this utility model, the lifting drive mechanism is a large-stroke hydraulic pressing cylinder that can be matched with the large-diameter working roller system and the small-diameter working roller system.

[0019] As described above, the double-roller work roll leveling equipment of this utility model has the following beneficial effects:

[0020] This utility model relates to a double-roll work roll leveling device, which allows the use of two sets of different types of work rolls within the same leveling machine frame. The appropriate type of work roll can be selected according to the requirements of different leveling equipment. This utility model enables different types of work rolls to be leveled and rolled within the same frame, saving investment costs, improving production efficiency, and meeting the process requirements of high-reduction leveling machines.

[0021] This utility model is equipped with a matching transmission method and a corresponding emulsion spraying device or leveling liquid spraying device when the corresponding working roller system is performing leveling work, so as to meet the requirements of the corresponding leveling equipment and ensure production operation.

[0022] The two sets of different types of work rollers of this invention can share all components except the work roller itself, reducing the number of spare parts. At the same time, the parts can be interchanged, improving production efficiency and reducing operating costs. Attached Figure Description

[0023] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0024] Figure 1 This is a diagram showing the state of the double-roller work roll system of the present invention when a large-diameter work roll system is installed.

[0025] Figure 2 This is a diagram showing the state of the double-roller work roll leveling equipment of this utility model when a small-diameter work roll system is installed.

[0026] Figure 3 This is a schematic diagram of a conventional single-frame leveling unit in the existing technology.

[0027] Figure 4 This is a schematic diagram of an existing dual-frame leveling machine.

[0028] In the picture:

[0029] 1. Leveling machine frame; 2. Upper support roller; 3. Lower support roller; 4. Large diameter working roller system; 5. Small diameter working roller system; 6. Lifting drive mechanism. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0031] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the present invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on this invention, and these should all be considered within the scope of this 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 considered to be "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 connections 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.

[0032] 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.

[0033] like Figure 1 , Figure 2 As shown, this utility model provides a double-roller work roll leveling device, including a leveling machine frame 1. The leveling machine frame 1 is provided with an upper support roller 2 and a lower support roller 3 that are spaced apart vertically and can be raised and lowered. The upper support roller 2 and the lower support roller 3 can switch between supporting a large-diameter work roll system 4 for leveling ordinary steel (which can be ordinary low-carbon steel and deep-drawing low-carbon steel) or a small-diameter work roll system 5 for leveling special steel (which can be high-strength steel and superior special steel). The bottom end of the leveling machine frame 1 is provided with a lifting drive mechanism 6 for pressing the lower support roller 3 to match and support the large-diameter work roll system 4 and the small-diameter work roll system 5.

[0034] This utility model relates to a double-roll work roll leveling device, which allows the use of two sets of different types of work rolls within the same leveling machine frame. The appropriate type of work roll is selected based on the requirements of different leveling equipment. This utility model enables different types of work rolls to perform leveling and rolling within the same frame, saving investment costs, improving production efficiency, and meeting the process requirements of high-reduction leveling machines. The two sets of different types of work rolls can share all components except the work rolls themselves, reducing the number of spare parts. Furthermore, the parts are interchangeable, improving production efficiency and reducing operating costs.

[0035] Furthermore, the dual-roll work roll leveling equipment includes a work roll changing device that can accommodate both the large-diameter work roll system 4 and the small-diameter work roll system 5. The two work roll systems can be changed using only one work roll changing device, eliminating the need to redesign a separate changing system and meeting the requirements of the leveling machine.

[0036] Furthermore, the dual-roll work roll leveling equipment includes an emulsion spraying device that matches the small-diameter work roll system 5 (the emulsion spraying structure of the existing small-roll leveling machine can be adopted).

[0037] Furthermore, the dual-roll system work roll leveling equipment includes a first transmission structure that matches the small-diameter work roll system 5 (the transmission structure of an existing small-roll system leveling machine can be adopted).

[0038] Furthermore, such as Figure 2 As shown, the small-diameter work roll system 5 includes a pair of small-diameter work rolls with a diameter of 330-360 mm.

[0039] Furthermore, the dual-roll system work roll leveling equipment includes a leveling liquid spraying device that matches the large-diameter work roll system 4 (the leveling liquid spraying structure of existing conventional leveling machines can be adopted).

[0040] Furthermore, the double-roll work roll leveling equipment includes a second transmission structure that matches the large-diameter work roll system 4 (which can be the transmission structure of an existing ordinary leveling machine).

[0041] Furthermore, such as Figure 1 As shown, the large-diameter work roll system 4 includes a pair of large-diameter work rolls with a diameter of 450-550 mm.

[0042] As can be seen from the foregoing, this utility model is equipped with a matching transmission method and a corresponding emulsion spraying device or leveling liquid spraying device when the corresponding working roller system is performing leveling work, so as to meet the requirements of the corresponding leveling equipment and ensure production operation.

[0043] Furthermore, the lifting drive mechanism 6 is a large-stroke hydraulic pressing cylinder that can be matched with the large-diameter work roller system 4 and the small-diameter work roller system 5. Specifically, a large-stroke AGC hydraulic pressing cylinder that matches the dual-roller system (large-diameter work roller system 4 and small-diameter work roller system 5) can be selected. Here, "large stroke" means that when using the small-diameter work roller system 5 for leveling work, the upward stroke of the large-stroke AGC hydraulic pressing cylinder is greater than the stroke of the pressing cylinder during ordinary leveling.

[0044] The method of using this utility model is as follows:

[0045] In the high-reduction secondary cold rolling mode, the leveling mill stand 1 is equipped with a small-diameter work roll system 5 (such as...). Figure 2 As shown in the figure, the diameter of its small-diameter work roller is Φ330mm. The process requirement of large reduction volume is achieved through a corresponding emulsion spraying device.

[0046] In normal leveling mode, the leveling machine frame 1 is equipped with a large-diameter work roller system 4 (such as...). Figure 1 As shown in the image, the diameter of its large-diameter work roller is Φ500mm. The leveling process requirements are achieved through a corresponding leveling liquid spraying device.

[0047] As described above, the double-roller work roll leveling equipment of this utility model has the following beneficial effects:

[0048] This utility model relates to a double-roll work roll leveling device, which allows the use of two sets of different types of work rolls within the same leveling machine frame. The appropriate type of work roll can be selected according to the requirements of different leveling equipment. This utility model enables different types of work rolls to be leveled and rolled within the same frame, saving investment costs, improving production efficiency, and meeting the process requirements of high-reduction leveling machines.

[0049] This utility model is equipped with a matching transmission method and a corresponding emulsion spraying device or leveling liquid spraying device when the corresponding working roller system is performing leveling work, so as to meet the requirements of the corresponding leveling equipment and ensure production operation.

[0050] The two sets of different types of work rollers of this invention can share all components except the work roller itself, reducing the number of spare parts. At the same time, the parts can be interchanged, improving production efficiency and reducing operating costs.

[0051] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A twin roll work roll skin pass mill characterized by, The machine includes a leveling machine frame, within which are upper and lower support rollers that are spaced apart and adjustable in height. The upper and lower support rollers can switch between supporting a large-diameter work roller system for leveling ordinary steel or a small-diameter work roller system for leveling special steel. The bottom end of the leveling machine frame is provided with a lifting drive mechanism for pressing and tightening the lower support rollers to match and support the large-diameter and small-diameter work roller systems.

2. The twin roll working roll skin pass mill of claim 1 wherein, The dual-roller work roll leveling equipment includes a work roll changing device that can accommodate both the large-diameter work roll system and the small-diameter work roll system.

3. The twin roll working roll skin pass mill of claim 1 or 2, wherein, The dual-roller work roll leveling equipment includes an emulsion spraying device that matches the small-diameter work roll system.

4. The twin roll working roll skin pass mill of claim 3 wherein, The dual-roller work roll leveling equipment includes a first transmission structure that matches the small-diameter work roll system.

5. The double-roller work roll leveling equipment as described in claim 3, characterized in that, The small-diameter work roll system includes pairs of small-diameter work rolls, the diameter of which is 330-360 mm.

6. The double-roller work roll leveling equipment as described in claim 1 or 2, characterized in that, The dual-roller work roll leveling equipment includes a leveling liquid spraying device that matches the large-diameter work roll system.

7. The double-roller work roll leveling equipment as described in claim 6, characterized in that, The dual-roller work roll leveling equipment includes a second transmission structure that matches the large-diameter work roll system.

8. The double-roller work roll leveling equipment as described in claim 6, characterized in that, The large-diameter work roll system includes a pair of large-diameter work rolls, the diameter of which is 450-550 mm.

9. The double-roller work roll leveling equipment as described in claim 1, characterized in that, The lifting drive mechanism is a long-stroke hydraulic pressing cylinder that can be matched with the large-diameter work roller system and the small-diameter work roller system.

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