Four-roller mill capable of conveniently adjusting height of rolling line
By designing a backing plate adjustment device in the four-high rolling mill, the sliding plate and drive assembly are used to realize rapid replacement and accurate adjustment of the backing plate, which solves the problem of highly time-consuming, labor-intensive and safety risks in adjusting the rolling line, and improves production efficiency and Safety ensures the stability of the rolling process and product quality.
Patent Information
- Application Number
- CN202421146236.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-24
AI Technical Summary
During the steel rolling production process, adjusting the height of the rolling line is time-consuming, labor-intensive, and low efficiency and safety risks, which can easily lead to incorrect adjustment of the thickness of the pads on both sides of the rolling mill, causing deviations in the height of the rolling line, affecting production continuity and products quality.
A four-roll rolling mill is designed to facilitate the adjustment of the height of the rolling line. It adopts a backing plate adjustment device, including a base, a lower slide, a sliding plate and a lower positioning block. Multiple backing plate assemblies with different thicknesses are set on the sliding plate and the sliding pair is used. and drive components enable quick replacement and accurate adjustment of backing plates.
Through the design of this device, the height of the rolling line can be adjusted quickly and accurately, avoiding errors caused by inconsistent backing plate thickness, improving production efficiency and safety, and ensuring the stability of the rolling process and product quality.
Smart Images
Figure CN222369955U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steel rolling, in particular to a four-roller rolling mill which is convenient for adjusting the height of a rolling line. Background Art
[0002] In hot rolling production lines, in order to ensure stable rolling operation, the actual height of the rolling line must be controlled within a certain range, usually ±5mm. The so-called rolling line height, also known as the mill elevation, refers to the vertical distance between the roll surface of the mill working roll or support roll and the rolling line. This height is usually determined by measurement and calculation to ensure stability during the rolling process and product quality. During the rolling process, accurate control of the rolling line height is of great significance to maintaining a stable rolling state and product consistency.
[0003] The rolling line height is equal to the sum of the thickness of the lower support roller pad, the radius of the lower support roller, and the diameter of the lower working roll minus the mill frame constant. It can be seen that the rolling line height is only related to the thickness of the lower support roller pad, the radius of the lower support roller, and the diameter of the lower working roll. Therefore, when the radius of the lower support roller and the diameter of the lower working roll are determined, the only factor affecting the rolling line height is the thickness of the lower support roller pad. When adjusting the pad thickness, due to the heavy weight of the pad, manual handling or overhead crane lifting is required, which is not only time-consuming and labor-intensive, but also has low work efficiency; in addition, the small working space is not conducive to personnel operation, and there is also a risk of squeezing and injuring workers. If the worker makes an error in operation and the pad thickness on both sides of the mill is adjusted incorrectly, the actual rolling line height at both ends of the mill will deviate greatly from the theoretical rolling line height. When the theoretical rolling line height is greater than the actual rolling line height, the rollers will be unable to contact. When the theoretical rolling line height is less than the actual rolling line height, the rolls will contact in advance. Both situations will lead to zero adjustment failure, resulting in production interruption, and sometimes damage to the equipment, severe vibration of the looper, or tail swinging, which seriously affects product quality and yield rate. If the thickness of the pad on one side of the rolling mill is adjusted incorrectly, there will be a large deviation in the height of the roll surface on both sides of the lower working roll in the rolling mill, resulting in uneven roll gaps, deviation during rolling, and in severe cases, scrap steel, affecting the continuity of rolling. Utility Model Content
[0004] The utility model is used to overcome the defects of the prior art and provide a four-roller rolling mill which is convenient for adjusting the height of the rolling line, so as to solve the problems mentioned in the background technology.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A four-roller rolling mill for adjusting the height of a rolling line, comprising a lower support roll, two working rolls, and an upper support roll arranged from bottom to top; a pad adjustment device is arranged below the lower support roll, the pad adjustment device is composed of a base and a lower slide seat, and a slide plate and a lower positioning block are arranged on the lower slide seat;
[0007] The base is set on the ground, and a first slide rail is arranged on it, and the lower slide seat is installed on the first slide rail, and the edges are clamped on both sides of the first slide rail, and can slide along the first slide rail; the lower slide seat is provided with a second slide rail, and the slide plate is installed on the second slide rail, and can slide along the second slide rail; the lower positioning block is fixedly connected to the lower slide seat, and a passage hole for the slide plate to pass through is arranged on it; a pad assembly is arranged on the slide plate, and the number of pad assemblies is 2 groups, and each group of pad assemblies is composed of a plurality of pads of different thicknesses, and the pads are placed under the bearing seat of the lower support roller, and the support block arranged under the bearing seat is pressed on the pad.
[0008] The above-mentioned four-roller rolling mill is easy to adjust the rolling line height, and the pad assembly includes 7 pads with thicknesses of 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, and 120mm respectively. The 7 pads are arranged in sequence from low to high and fixed on the slide.
[0009] In the above-mentioned four-roller rolling mill which is easy to adjust the height of the rolling line, in the two pad assemblies, the distance between two pads of the same height is equal to the distance between the two bearing seats of the lower support roller.
[0010] The above-mentioned four-roller rolling mill which is convenient for adjusting the height of the rolling line, has a lower positioning block composed of four rectangular protrusions, and the central recess formed by the four rectangular protrusions matches the pad; the lower positioning block matches the upper positioning block below the lower support roller bearing seat, and when the bearing seat falls, the lower positioning block is inserted into the gap between the upper positioning blocks, and the two are combined to form a mortise and tenon structure; the upper positioning block and the lower positioning block are combined to limit the horizontal movement between the bearing seat and the lower sliding seat.
[0011] The above-mentioned four-high rolling mill that is convenient for adjusting the height of the rolling line is provided with a first driving component between the slide plate and the lower slide seat, and the first driving component is a hydraulic cylinder or an electric cylinder.
[0012] The above-mentioned four-high rolling mill that is convenient for adjusting the height of the rolling line is provided with a second driving component between the lower slide and the base, and the second driving component is a hydraulic cylinder or an electric cylinder. Beneficial Effects
[0013] Compared with the existing vertical mill system, the utility model has the following advantages:
[0014] First, by setting two pad assemblies on the slide, the lower slide seat is slid and replaced, and pads of different thicknesses are placed on the support block under the bearing seat to adjust the height of the rolling line. Since the distance between two pads of the same height is equal to the distance between the two bearing seats of the support roller, there will be no mistakes in replacing pads of different thicknesses under the two bearing seats, thereby ensuring the safety and accurate operation of rolling.
[0015] Secondly, by arranging a slidable lower slide seat on the base, the lower positioning block is matched and aligned with the upper positioning block under the bearing seat of the support roller. After the upper positioning block and the lower positioning block are combined, the horizontal movement between the bearing seat and the lower slide plate is restricted; the support block arranged under the bearing seat is pressed on the pad, and the slide plate on the lower slide seat is pushed and pulled to replace the pads of different heights, so as to realize the rapid adjustment of the rolling line height.
[0016] Third, through the setting of two sliding pairs, the originally complicated work of replacing the pads is simplified to the translational action of the lower slide and the slide driven by two driving components; and the error of inconsistent replacement thickness of the pads on both sides of the bearing seat is structurally eliminated, which not only improves the adjustment efficiency but also ensures production safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0018] Figure 1 It is a top view schematic diagram of the overall structure of the utility model;
[0019] Figure 2 It is a side view schematic diagram of the overall structure of the utility model;
[0020] Figure 3 It is a partial structural schematic diagram of the utility model;
[0021] Figure 4 It is another partial structural schematic diagram of the utility model;
[0022] The symbols in the figure represent:
[0023] 1. Base, 2. Lower slide seat, 3. Slide plate, 4. Lower positioning block, 5. Pad, 6. Lower support roller, 7. Support block, 8. First drive assembly, 9. Second drive assembly, 3-1. Passage hole, 4-1. Central recess, 6-1. Upper positioning block. DETAILED DESCRIPTION
[0024] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.
[0025] like Figure 1-4As shown, the utility model includes a lower support roller 6, two working rollers, an upper support roller, and a pad adjustment device arranged below the lower support roller 6 from bottom to top, wherein the pad adjustment device is composed of a base 1 and a lower lower seat 2, and a slide plate 3 and a lower positioning block 4 are arranged on the lower lower seat 2;
[0026] A base 1 is set on the ground, and a first slide rail is arranged on it, and a lower slide seat 2 is installed on the first slide rail, and the edges are clamped on both sides of the first slide rail, and can slide along the first slide rail; a second slide rail is arranged on the lower slide seat 2, and a slide plate 3 is installed on the second slide rail, and can slide along the second slide rail; a lower positioning block 4 is fixedly connected to the lower slide seat 2, and a passage hole 3-1 for the slide plate 3 to pass through is arranged on it; a pad assembly is arranged on the slide plate 3, and the number of pad assemblies is 2 groups, and each group of pad assemblies is composed of a plurality of pads 5 with different thicknesses, and the pad 5 is padded under the bearing seat of the lower support roller 6, and a support block 7 arranged under the bearing seat is pressed on the pad 5.
[0027] A four-roll mill is a rolling mill that has four rolls located in the same vertical plane and consists of two working rolls and two support rolls arranged above and below them. The workpiece is rolled between two working rolls with smaller diameters. The diameters of the upper and lower support rolls are more than twice that of the working rolls. Their function is to make use of the advantages of rolling with small-diameter rolls while giving the working rolls a small deflection, which can ensure that the workpiece is rolled thinner.
[0028] The lower positioning block 4 is composed of four rectangular protrusions, and the central recess 4-1 formed by the four rectangular protrusions matches the pad 5; the lower positioning block 4 matches the upper positioning block 6-1 below the bearing seat of the lower support roller 6. When the bearing seat falls, the lower positioning block 4 is inserted into the gap between the upper positioning blocks 6-1, and the two are combined to form a mortise and tenon structure; the upper positioning block 6-1 is combined with the lower positioning block 4 to limit the horizontal movement between the bearing seat and the lower slide plate 2.
[0029] The pad assembly includes 7 pads 5 with thicknesses of 90 mm, 95 mm, 100 mm, 105 mm, 110 mm, 115 mm and 120 mm respectively. The 7 pads 5 are arranged in sequence from low to high and fixed on the slide plate 3.
[0030] In the two pad assemblies, the distance between the two pads 5 of the same height is equal to the distance between the two bearing seats of the lower support roller 6. The rolling line height can be adjusted by sliding and relocating the lower slide 2 and padding the pads 5 of different thicknesses on the support block 7 under the bearing seat.
[0031] A sliding pair is formed between the lower slide seat 2 and the first slide rail, and a sliding pair is formed between the slide plate 3 and the second slide rail. By arranging a slidable lower slide seat 2 on the base 1, the lower positioning block 4 is matched and aligned with the upper positioning block 6-1 under the bearing seat of the support roller 6; by arranging a slidable slide plate 3 on the lower slide seat 2, the pad 5 can be accurately replaced and replaced synchronously. By pushing or pulling out the lower slide seat 2 from the side, switching between pads 5 of different thicknesses can be achieved, which not only improves the replacement speed, but also because the distance between two pads 5 of the same height is equal to the distance between the two bearing seats of the support roller 6, there will be no mistakes in replacing pads of different thicknesses under the two bearing seats, thereby ensuring the safety and accurate operation of rolling.
[0032] A first driving assembly 8 is arranged between the slide plate 3 and the lower slide base 2, and the first driving assembly 8 is a hydraulic cylinder or an electric cylinder. A second driving assembly 9 is arranged between the lower slide base 2 and the base 1, and the second driving assembly 9 is a hydraulic cylinder or an electric cylinder. The number of hydraulic cylinders or electric cylinders in the second driving assembly 9 is 1-2, and they are arranged symmetrically.
Claims
1. A four-high rolling mill that is convenient for adjusting the height of a rolling line, comprising a lower support roll (6), two working rolls, and an upper support roll arranged from bottom to top; It is characterized in that A pad adjustment device is provided below the lower support roller (6), the pad adjustment device comprising a base (1) and a lower slide seat (2), wherein the lower slide seat (2) is provided with a slide plate (3) and a lower positioning block (4); The base (1) is arranged on the ground and is provided with a first slide rail. The lower slide seat (2) is mounted on the first slide rail, and its edges are clamped on both sides of the first slide rail so that the base (1) can slide along the first slide rail. The lower slide seat (2) is provided with a second slide rail, and the slide plate (3) is mounted on the second slide rail so that the slide plate (3) can slide along the second slide rail. The lower positioning block (4) is fixedly connected to the lower slide seat (2) and is provided with a passage hole (3-1) for the slide plate (3) to pass through. The slide plate (3) is provided with a pad assembly, and the pad assembly is in two groups, and each group of pad assemblies is composed of a plurality of pads (5) of different thicknesses. The pads (5) are placed under the bearing seat of the lower support roller (6), and the support block (7) arranged under the bearing seat is pressed on the pads (5).
2. The four-high rolling mill for adjusting the rolling line height according to claim 1, characterized in that: The pad assembly comprises seven pads (5) having thicknesses of 90 mm, 95 mm, 100 mm, 105 mm, 110 mm, 115 mm and 120 mm, respectively. The seven pads (5) are arranged in order from low to high and fixed on the slide plate (3).
3. The four-high rolling mill for adjusting the rolling line height according to claim 2, characterized in that: In the two pad assembly, the distance between two pads (5) of the same height is equal to the distance between the two bearing seats of the lower support roller (6).
4. The four-high rolling mill for adjusting the rolling line height according to claim 1, characterized in that: The lower positioning block (4) is composed of four rectangular protrusions, and the central recess (4-1) formed by the four rectangular protrusions matches the pad (5); the lower positioning block (4) matches the upper positioning block (6-1) below the bearing seat of the lower support roller (6); when the bearing seat falls, the lower positioning block (4) is inserted into the gap between the upper positioning blocks (6-1), and the two are combined to form a mortise and tenon structure; after the upper positioning block (6-1) and the lower positioning block (4) are combined, the horizontal movement between the bearing seat and the lower slide seat (2) is restricted.
5. The four-high rolling mill for easy adjustment of rolling line height according to claim 1, characterized in that: A first drive assembly (8) is provided between the slide plate (3) and the lower slide seat (2), wherein the first drive assembly (8) is a hydraulic cylinder or an electric cylinder.
6. The four-high rolling mill for adjusting the rolling line height according to claim 1, characterized in that: A second drive assembly (9) is provided between the lower sliding seat (2) and the base (1), and the second drive assembly (9) is a hydraulic cylinder or an electric cylinder.