A rolling mill improvement for preventing scratches on the surface of small bars

Abstract

The utility model provides a kind of rolling mill improved structure for preventing scratch small bar surface, including fixed base, rolling mill rack and replacement rack, replacement rack inside is equipped with replacement roller and side vertical wheel subassembly, and rolling mill rack is equipped with work roll, support roll and apron subassembly inside.Just vertical wheel subassembly is fixed on replacement rack by mounting plate, including adjustable height's side vertical wheel body, for stabilizing the trajectory of bar movement.Apron subassembly adopts integral cast iron material and installs conical wheel, reduces the friction of bar and passage.Support roll height is accurately adjusted by screw rod mechanism driven by servo motor, to ensure that rolling line is horizontal.The utility model optimizes guide structure and motion stability, effectively solves the problem of surface scratch caused by guide deflection and bar jumping of traditional rolling mill, improves product quality and production efficiency, and is suitable for high-temperature high-speed rolling environment.

Description

Technical Field

[0001] This utility model relates to the technical field of small bar rolling mill equipment, and more particularly to an improved structure for rolling mills to prevent scratches on the surface of small bars. Background Technology

[0002] Small bar mills are mainly used to produce small-sized bars, especially hot-rolled ribbed steel bars. Through the rolling process, metal billets can be processed into bars of the required specifications. Small bar mills adopt split rolling technology, which can expand the range of product specifications, optimize the connection between continuous casting and steel rolling production, release production potential, and achieve energy saving, consumption reduction and cost optimization. Through continuous rolling process and high-precision mill design, small bar mills can achieve efficient and smooth production process, improve production efficiency and quality.

[0003] Traditional rolling mills suffer from several significant drawbacks. First, the installation accuracy of the rolls and guides is difficult to guarantee. Installation is primarily performed by experienced workers in the assembly area, lacking the calibration capabilities of optical equipment. During rolling, as the steel throughput increases, the fixing screws of the inlet and outlet guides and frames easily loosen, causing guide misalignment. This results in the workpiece scraping against the exit bore, causing scratches on the steel surface and affecting product quality.

[0004] Secondly, the movement trajectory of round steel on the conveyor rollers is unstable. This is due to tension fluctuations and the difficulty in maintaining absolute horizontality on the rolling line, causing the round steel to jump and sway slightly as it advances. This makes it easy for the round steel to come into contact with the side walls of the steel passage, the pinch rollers, and the inlet guide groove of the flying shear. Because of the high surface temperature and low hardness of red-hot steel, this contact easily produces intermittent or continuous scratches, further affecting the surface quality of the steel.

[0005] Therefore, there is an urgent need for a structure that can accurately calibrate the guide and stabilize the trajectory of the rod, so as to solve the problem of scratches caused by insufficient installation accuracy of the guide and instability of the rod's movement trajectory. Utility Model Content

[0006] To address the aforementioned technical problems, an improved mill structure is provided to prevent scratches on the surface of small bars. This invention achieves stable guidance and precise positioning of the rolled piece by adding a side vertical roller assembly, a skirt assembly, a height-adjustable support roller, and a screw drive mechanism, thereby completely avoiding scratches on the surface of the small bars.

[0007] To achieve the above objectives, this utility model provides an improved mill structure for preventing scratches on the surface of small bars, including a fixed base. A mill frame is fixedly installed on one side of the top of the fixed base, and a replacement frame is fixedly installed on the other side of the top of the fixed base. Several replacement rollers are rotatably connected inside the replacement frame. A side roller assembly is fixedly installed on one side of the replacement frame. A first height groove is formed on one side of the inner wall of the mill frame, and a second height groove is formed on the other side of the inner wall of the mill frame. A work roller is rotatably connected to the bottom of the inner wall of the mill frame. Two skirt plate assemblies, respectively located above the work rollers, are fixedly installed on the mill frame. A support roller is provided at the bottom of the mill frame. The side roller assembly includes two mounting plates and two height shells. The tops of the two mounting plates are fixedly connected to the bottoms of the two height shells. A displacement frame is slidably connected inside each of the two height shells. Limit plates are fixedly installed on both sides of each of the two displacement frames. A side roller body is rotatably connected between every two pairs of opposite limit plates. A connecting plate is fixedly installed at the top between the two height shells.

[0008] Furthermore, one end of each of the two mounting plates is fixedly connected to the replacement frame, and the side wheel assembly is mounted on the replacement frame via the mounting plates.

[0009] Furthermore, both of the skirt board assemblies include a skirt board frame and a reinforcing frame. The interior of the skirt board frame is fixedly connected to one end of the reinforcing frame. A rolling groove is provided at the top of the inner wall of the skirt board frame, and a conical wheel is rotatably connected inside the rolling groove.

[0010] Furthermore, one side of each of the two skirt frames is fixedly connected to the rolling mill frame, and the skirt assembly is installed on the rolling mill frame through the skirt frames.

[0011] Furthermore, a stepper motor that drives the work roll to rotate is fixedly installed on the surface of the mill stand. After the stepper motor is powered on, it starts and drives the work roll to rotate. The work roll and the support roll cooperate with each other to perform rolling operation on the product.

[0012] Furthermore, a lead screw is rotatably connected inside the first height groove, and a first height block is slidably connected to the middle of the lead screw. One side of the first height block is rotatably connected to the side of the support roller. A servo motor for driving the lead screw to rotate is fixedly installed at the top of the mill stand. After the servo motor is powered on, it starts and drives the lead screw to rotate. The thread on the surface of the lead screw matches the thread on the inner wall of the first height block, and the first height block is limited by the first height groove. Therefore, the first height block slides along the lead screw, and the first height block adjusts the height of the support roller.

[0013] Furthermore, a second height block is slidably connected inside the second height groove. One side of the second height block is rotatably connected to the side of the support roller opposite to it. The second height block slides along the second height groove, driving the support roller to move up and down synchronously.

[0014] By adopting the above technical solution, this utility model has the following advantages compared with the prior art: 1. This utility model provides an improved mill structure for preventing scratches on the surface of small bars. The first height block is raised and lowered by a servo motor-driven screw, and the second height block is passively followed in the second height groove. This achieves synchronous and precise height adjustment on both sides of the support roller, completely eliminating the skew caused by loose guide screws, avoiding scraping between the rolled piece and the exit inner chamber, and significantly reducing scratches on the steel surface.

[0015] 2. The present invention provides an improved mill structure for preventing scratches on the surface of small bars. The structure consists of a skirt assembly and a side roller assembly. The skirt assembly is made of an integral cast iron skirt frame and a conical wheel. The conical wheel rotates in the rolling groove to reduce friction on the bars. The side roller assembly is limited by a displacement frame sliding within the height shell to adapt to the swing trajectory of the bars and avoid hard contact with the side wall of the steel passage, thus significantly reducing the scratch rate of the red steel. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an improved rolling mill structure for preventing scratches on the surface of small bars, as described in this utility model. Figure 2 This is a detailed drawing of the mill stand in an improved mill structure for preventing scratches on the surface of small bars, as described in this utility model. Figure 3 This is a schematic diagram of the structure of a skirt assembly for an improved rolling mill structure used to prevent scratches on the surface of small bars, as described in this utility model. Figure 4 This is a schematic diagram of the vertical roller assembly of an improved rolling mill structure for preventing scratches on the surface of small bars, as described in this utility model.

[0018] In the diagram: 1. Fixed base; 2. Stepper motor; 3. Rolling mill frame; 4. Servo motor; 5. Replacement frame; 6. Replacement roll; 7. Second height block; 8. Support roll; 9. Side roller assembly; 91. Mounting plate; 92. Height shell; 93. Displacement frame; 94. Limiting plate; 95. Side roller body; 96. Connecting plate; 10. Work roll; 11. Skirt assembly; 111. Skirt frame; 112. Conical wheel; 113. Rolling groove; 114. Reinforcing frame; 12. First height groove; 13. Lead screw; 14. First height block; 15. Second height groove. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0023] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0024] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0025] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0026] Example like Figures 1 to 4 As shown, this utility model provides an improved mill structure for preventing scratches on the surface of small bars, including: a fixed base 1, a mill frame 3 fixedly installed on one side of the top of the fixed base 1, a replacement frame 5 fixedly installed on the other side of the top of the fixed base 1, a plurality of replacement rollers 6 rotatably connected inside the replacement frame 5, a side vertical wheel assembly 9 fixedly installed on one side of the replacement frame 5, a first height groove 12 opened on one side of the inner wall of the mill frame 3, a second height groove 15 opened on the other side of the inner wall of the mill frame 3, and a work roller 10 rotatably connected to the bottom end of the inner wall of the mill frame 3. Two skirt plate assemblies 11 are fixedly installed on the mill frame 3, each located above the work roll 10. A support roll 8 is provided at the bottom end of the mill frame 3. The side vertical wheel assembly 9 includes two mounting plates 91 and two height shells 92. The top ends of the two mounting plates 91 are fixedly connected to the bottom ends of the two height shells 92. Displacement frames 93 are slidably connected inside the two height shells 92. Limiting plates 94 are fixedly installed on both sides of the two displacement frames 93. A side vertical wheel body 95 is rotatably connected between each pair of opposite limiting plates 94. A connecting plate 96 is fixedly installed at the top end between the two height shells 92.

[0027] One end of each of the two mounting plates 91 is fixedly connected to the replacement frame 5, and the side wheel assembly 9 is mounted on the replacement frame 5 through the mounting plates 91.

[0028] Both skirt board assemblies 11 include a skirt board frame 111 and a reinforcing frame 114. The interior of the skirt board frame 111 is fixedly connected to one end of the reinforcing frame 114. A rolling groove 113 is provided at the top of the inner wall of the skirt board frame 111, and a conical wheel 112 is rotatably connected inside the rolling groove 113.

[0029] One side of each of the two skirt brackets 111 is fixedly connected to the mill frame 3, and the skirt assembly 11 is installed on the mill frame 3 through the skirt brackets 111.

[0030] A stepper motor 2 that drives the work roll 10 to rotate is fixedly installed on the surface of the mill stand 3. After the stepper motor 2 is powered on, it starts and drives the work roll 10 to rotate. The work roll 10 and the support roll 8 cooperate with each other to perform rolling operation on the product.

[0031] A lead screw 13 is rotatably connected inside the first height groove 12. A first height block 14, which is slidably connected to the first height groove 12, is threadedly connected to the middle of the lead screw 13. One side of the first height block 14 is rotatably connected to the side of the support roller 8 opposite to it. A servo motor 4 that drives the lead screw 13 to rotate is fixedly installed at the top of the mill frame 3. When the servo motor 4 is powered on, it starts and drives the lead screw 13 to rotate. The threads on the surface of the lead screw 13 match the threads on the inner wall of the first height block 14. The first height block 14 is limited by the first height groove 12, so the first height block 14 slides along the lead screw 13 and adjusts the height of the support roller 8.

[0032] The second height groove 15 is internally slidably connected to a second height block 7. One side of the second height block 7 is rotatably connected to the side of the support roller 8 that is directly opposite to it. The second height block 7 slides along the second height groove 15, driving the support roller 8 to move up and down synchronously.

[0033] In this embodiment, when in use: the servo motor 4 is powered on and starts, driving the lead screw 13 to rotate. The thread on the surface of the lead screw 13 matches the thread on the inner wall of the first height block 14, and the first height block 14 is limited by the first height groove 12, so the first height block 14 slides along the lead screw 13, adjusting the height of the support roller 8. The stepper motor 2 is powered on and starts, driving the work roller 10 to rotate. The work roller 10 and the support roller 8 cooperate to perform a rolling operation on the product, eliminating the original method of fixing the wear-resistant plate with countersunk screws. Each skirt plate is made of integral cast iron. Simultaneously, specially designed conical rollers 112 are installed. The rollers adopt a modular design, which is convenient for disassembly and assembly. The rollers are made of GX180 high-chromium alloy, which ensures sufficient hardness and wear resistance for use at high temperatures and a long service life. The total length of the bar skirt is 182 meters. Considering the running effect of Φ12-30 round bars on the skirt, a skirt with a vertical roller is installed every other conveyor roller. Considering the maximum rolling speed of 18m / s for the bars and the final rolling temperature of 850-900℃, and considering the timeliness of lubrication, a small oil-air lubrication device is configured at the same time to cool and lubricate the conical vertical rollers at the skirt using oil-air lubrication.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An improved mill structure for preventing scratches on the surface of small bars, characterized in that, include: A fixed base (1) is provided, on one side of the top of the fixed base (1) a rolling mill frame (3) is fixedly installed, and on the other side of the top of the fixed base (1) a replacement frame (5) is fixedly installed. Several replacement rollers (6) are rotatably connected inside the replacement frame (5). A side roller assembly (9) is fixedly installed on one side of the replacement frame (5). A first height groove (12) is provided on one side of the inner wall of the rolling mill frame (3), and a second height groove (15) is provided on the other side of the inner wall of the rolling mill frame (3). A work roller (10) is rotatably connected to the bottom of the inner wall of the rolling mill frame (3). Two work rollers (10) are fixedly installed on the rolling mill frame (3) respectively located at the work rollers. The skirt assembly (11) above the roller (10) has a support roller (8) at the bottom of the mill stand (3). The side vertical wheel assembly (9) includes two mounting plates (91) and two height shells (92). The top of the two mounting plates (91) is fixedly connected to the bottom of the two height shells (92). The interior of each of the two height shells (92) is slidably connected to a displacement frame (93). Limiting plates (94) are fixedly installed on both sides of each of the two displacement frames (93). A side vertical wheel body (95) is rotatably connected between each pair of opposite limiting plates (94). A connecting plate (96) is fixedly installed at the top between the two height shells (92).

2. A rolling mill as claimed in claim 1, wherein One end of each of the two mounting plates (91) is fixedly connected to the replacement frame (5), and the side wheel assembly (9) is mounted on the replacement frame (5) via the mounting plates (91).

3. A rolling mill arrangement for preventing scratching of the surface of small bars according to claim 1, characterized in that, Both of the skirt board assemblies (11) include a skirt board frame (111) and a reinforcing frame (114). The interior of the skirt board frame (111) is fixedly connected to one end of the reinforcing frame (114). A rolling groove (113) is provided at the top of the inner wall of the skirt board frame (111), and a conical wheel (112) is rotatably connected inside the rolling groove (113).

4. The improved mill structure for preventing scratches on the surface of small bars according to claim 3, characterized in that, One side of each of the two skirt brackets (111) is fixedly connected to the mill frame (3), and the skirt assembly (11) is installed on the mill frame (3) through the skirt brackets (111).

5. The rolling mill arrangement for preventing the surface of a small bar from being scratched according to claim 1, wherein The surface of the mill frame (3) is fixedly installed with a stepper motor (2) that drives the work roll (10) to rotate. After the stepper motor (2) is powered on, it starts and drives the work roll (10) to rotate. The work roll (10) and the support roll (8) cooperate to perform rolling operation on the product.

6. The improved mill structure for preventing scratches on the surface of small bars according to claim 1, characterized in that, The first height groove (12) is rotatably connected to a lead screw (13). The middle part of the lead screw (13) is threadedly connected to a first height block (14) that is slidably connected to the first height groove (12). One side of the first height block (14) is rotatably connected to the side of the support roller (8). The top of the mill frame (3) is fixedly installed with a servo motor (4) that drives the lead screw (13) to rotate. After the servo motor (4) is powered on, it starts and drives the lead screw (13) to rotate. The thread on the surface of the lead screw (13) matches the thread on the inner wall of the first height block (14). The first height block (14) is limited by the first height groove (12), so the first height block (14) slides along the lead screw (13) and adjusts the height of the support roller (8).

7. The improved mill structure for preventing scratches on the surface of small bars according to claim 1, characterized in that, The second height groove (15) is slidably connected to a second height block (7). One side of the second height block (7) is rotatably connected to the side of the support roller (8) opposite to it. The second height block (7) slides along the second height groove (15) and drives the support roller (8) to move up and down synchronously.

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