A hot continuous rolling device for improving scale folding of grain boundary weakened stainless steel bar
Patent Information
- Application Number
- CN202522262262.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-27
AI Technical Summary
所以，钢坯轧制过程中必须将表面的氧化铁皮去除干净，否则大量硬度较高的氧化铁皮附着在钢坯表面会使钢坯的变形抗力增大，增加轧制成本和功率消耗，同时残余的氧化铁皮会在轧制过程中压入钢坯表面，严重影响钢坯的表面质量
[0013]在本方案中能够还设有除鳞机构，除鳞机构设置在轧制前的传输以及轧制后的传输过程中，能够通过除鳞机构对加热后的钢坯以及轧制后的产品进行快速有效的除鳞；具体的，通过第二电推杆推动支撑梁升降，进而通过弧形臂推动调节臂以主轴为轴心转动，进而使弧形臂拉动第二支撑板沿第一导向槽、第二导向槽升降，从而使喷管靠近钢坯或远离钢坯；既能根据实际钢坯尺寸进行调节使喷头准确的喷射钢坯的目的，还能在钢坯传输前抬升避免干涉钢坯传输进入的情况发生；其次，还能通过电机带动蜗杆转动，进而带动蜗轮转动，最终带动喷管转动实现喷射角度的调整，提高喷射效果，实现除鳞效果的提升；改善了棒材表面质量，降低了棒材表面出现鳞折现象的弊端。
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Figure CN224823897U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of stainless steel bar rolling technology, and specifically relates to a hot continuous rolling device for improving the scaling of stainless steel bars with weakened grain boundaries. Background Technology
[0002] Currently, on hot-rolled stainless steel bar production lines, steel billets undergo rapid oxidation under high-temperature conditions in the heating furnace. Brittle phases such as carbides and σ phases precipitate in the stainless steel. These phases tend to aggregate at grain boundaries, leading to decreased grain boundary bonding and increased brittleness, resulting in layers of iron oxide scale on the billet surface. Simultaneously, during transportation and rolling, the surface of the heated billet reacts with moisture and oxygen in the air to form secondary iron oxide scale. Therefore, it is crucial to thoroughly remove the surface iron oxide scale during billet rolling. Otherwise, a large amount of high-hardness iron oxide scale adhering to the billet surface will increase its deformation resistance, raising rolling costs and power consumption. Furthermore, residual iron oxide scale can be pressed into the billet surface during rolling, severely affecting the billet's surface quality.
[0003] In subsequent rolling deformation, these fragile grain boundaries become the source of cracks; when the cracks extend below the surface of the bar and are rolled to the surface in subsequent passes, they form fish-scale-like raised flake defects. Therefore, in the problem of removing scale defects, it is necessary to consider not only the root cause of scale defects but also the specific process of scale defects. Thus, the proposed solution should address both the symptoms and the root cause.
[0004] Therefore, the applicant provides a descaling technology solution to control and reduce the problem of scale formation caused by weakened grain boundaries. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a hot rolling device for improving the scaling of stainless steel bars with weakened grain boundaries, thereby reducing the probability of scaling phenomena through the application of a descaling mechanism.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] A hot continuous rolling apparatus for improving grain boundary weakening of stainless steel bars includes a conveying mechanism, a rolling mill, a water spraying mechanism, a conveying passage, and a descaling mechanism. The rolling mill includes a horizontal rolling mill and a vertical rolling mill. The conveying mechanism is equipped with conveying rollers for conveying steel billets, and baffles are provided on both sides of the conveying frame of the conveying mechanism. The conveying mechanism is located on one side of the horizontal rolling mill, and the horizontal rolling mill is located on one side of the vertical rolling mill. Several sets of horizontal and vertical rolling mills are provided and spaced apart from each other. The conveying passage connects the horizontal and vertical rolling mills for conveying steel billets. The water spraying mechanism is located on the horizontal and vertical rolling mills. The descaling mechanism is located on the conveying mechanism for water descaling. Rolls are provided on the vertical and horizontal rolling mills, and the rolls are provided with roll grooves.
[0008] The descaling mechanism includes a first support plate, a second support plate, a support beam, a nozzle, an adjusting arm, an arc-shaped arm, a second electric push rod, a motor, and a worm gear. A pair of first support plates are provided and fixed to both sides of the transmission mechanism. The first support plate has a first guide groove and a second guide groove at both ends, with the first guide groove located on one side of the second guide groove. A main shaft is also provided on the first support plate, and the adjusting arm is rotatably connected to the main shaft. A second rotating shaft is provided on the adjusting arm. A fixedly connected horizontal plate is also provided on the top of the first support plate. Several second support plates are provided, and each second support plate is rotatably connected to both ends of the nozzle, which is located on the first guide groove. Inside the groove, the second support plate is provided with a first rotating shaft and a limiting shaft, with the limiting shaft located in the second guide groove; the second electric actuator is fixed to the horizontal plate, and the top shaft of the second electric actuator passes through the horizontal plate and is fixedly connected to the support beam, which is located in the first guide groove and fixedly connected to the second support plate; the two ends of the arc-shaped arm are respectively rotatably connected to the first rotating shaft and the second rotating shaft; the second electric actuator pushes the support beam to rise and fall, and then the arc-shaped arm pushes the adjusting arm to rotate around the main shaft, thereby causing the arc-shaped arm to pull the second support plate to rise and fall along the first guide groove and the second guide groove, so that the nozzle approaches or moves away from the steel billet.
[0009] Furthermore, one end of the nozzle is equipped with a rotary joint and a connected water pipe, while the other end of the nozzle is equipped with a worm gear. The motor is fixed on a second support plate on one side, and the motor shaft end is equipped with a bevel gear. Both ends of the worm are fixed to the second support plate through bearing seats. The worm meshes with the worm gear, and one end of the worm is equipped with a bevel gear that meshes with the bevel gear at the motor shaft end. The motor drives the worm to rotate, which in turn drives the worm gear to rotate, ultimately driving the nozzle to rotate to adjust the spray angle and improve the spray effect. The water pipe is connected to an external water supply device.
[0010] The conveying mechanism has a correction mechanism on the baffle, including a push plate and a first electric push rod; the push plate has a first guide shaft, which is slidably connected to the baffle. A plurality of rotatably connected rollers are also provided on one side of the push plate. The first electric push rod is fixed on the baffle, and its top shaft passes through the baffle and is fixedly connected to the push plate. The first electric push rod pushes the push plate to make the rollers contact the steel billet, thereby correcting the conveying direction of the steel billet. The contact of the rollers with the steel billet facilitates the conveying of the steel billet.
[0011] The water spraying mechanism is fixed to one side of the rolling mill. The water spraying mechanism includes a mounting plate, a mounting block, and a water inlet pipe. The mounting plate is fixedly connected to the rolling mill and has a sliding groove. The mounting block has a screw on one side, which is located in the sliding groove. The mounting block is fixed at different positions on the mounting plate by means of a nut. The water inlet pipe is fixed on the mounting block and its outlet is aligned with the roll groove on the roll to cool the roll. The water inlet pipe is connected to an external water supply device.
[0012] The advantages of this utility model compared with the prior art are as follows:
[0013] This solution also includes a descaling mechanism, which is installed during the pre-rolling and post-rolling transport processes. This mechanism enables rapid and effective descaling of the heated billet and the rolled product. Specifically, a second electric actuator pushes the support beam to rise and fall, which in turn pushes the adjusting arm to rotate around the main shaft via an arc-shaped arm. This causes the arc-shaped arm to pull the second support plate up and down along the first and second guide grooves, thus moving the nozzle closer to or further away from the billet. This allows for adjustment based on the actual billet size, ensuring accurate nozzle spraying, and also prevents interference with the billet's transport before it enters the system. Furthermore, a motor drives a worm gear, which in turn drives a worm wheel, ultimately rotating the nozzle to adjust the spray angle, improving the spraying effect and enhancing descaling efficiency. This improves the surface quality of the bar stock and reduces the appearance of scale on the surface. Attached Figure Description
[0014] Appendix Figure 1 This is a schematic diagram of a hot rolling mill structure for improving the scaling of stainless steel bars with weakened grain boundaries, according to this utility model.
[0015] Appendix Figure 2 This is a schematic diagram of a hot rolling mill structure for improving the scaling of stainless steel bars with weakened grain boundaries, according to this utility model.
[0016] Appendix Figure 3 This is a schematic diagram of the descaling mechanism of this utility model. Figure 1 ;
[0017] Appendix Figure 4 This is a schematic diagram of the descaling mechanism of this utility model. Figure 2 ;
[0018] Appendix Figure 5 This is a schematic diagram of the corrective mechanism;
[0019] Appendix Figure 6 This is a simplified structural flow diagram of a hot continuous rolling device for improving the scaling and delamination of stainless steel bars with weakened grain boundaries, according to this utility model.
[0020] In the diagram: 1. Conveying mechanism; 101. Baffle; 2. Horizontal rolling mill; 3. Vertical rolling mill; 4. Roll; 41. Roll groove; 5. Steel billet; 6. Water spraying mechanism; 61. Mounting plate; 62. Mounting block; 63. Water inlet pipe; 64. Slide chute;
[0021] 7. Conveying channel; 8. Correction mechanism; 81. First electric actuator; 82. Push plate; 821. Roller; 822. First guide shaft;
[0022] 9. Descaling mechanism; 91. First support plate; 911. First guide groove; 912. Second guide groove; 913. Horizontal plate; 914. Main shaft; 92. Second support plate; 921. First rotating shaft; 922. Limiting shaft; 93. Support beam; 94. Spray nozzle; 941. Water pipe; 942. Worm gear; 943. Rotary joint; 95. Adjusting arm; 951. Second rotating shaft; 96. Arc arm; 97. Second electric actuator; 98. Motor; 99. Worm gear. Detailed Implementation
[0023] To facilitate understanding by those skilled in the art, the following is a detailed explanation in conjunction with the appendix. Figure 1-6 The technical solution of this utility model will be further described in detail below.
[0024] A hot continuous rolling apparatus for improving grain boundary weakening of stainless steel bars with scaling includes a conveying mechanism 1, a rolling mill, a water spraying mechanism 6, a conveying passage 7, and a descaling mechanism 9. The rolling mill includes a horizontal rolling mill 2 and a vertical rolling mill 3. The conveying mechanism 1 is equipped with conveying rollers for conveying steel billets 5, and baffles 101 are provided on both sides of the conveying frame of the conveying mechanism 1. The conveying mechanism 1 is located on one side of the horizontal rolling mill 2, and the horizontal rolling mill 2 is located on one side of the vertical rolling mill 3. Several sets of horizontal rolling mills 2 and vertical rolling mills 3 are provided and spaced apart from each other. The conveying passage 7 connects the horizontal rolling mill 2 and the vertical rolling mill 3 to convey steel billets. The water spraying mechanism 6 is located on the horizontal rolling mill 2 and the vertical rolling mill 3. The descaling mechanism 9 is located on the conveying mechanism 1 to perform water descaling. Rolls 4 are provided on the vertical rolling mill 3 and the horizontal rolling mill 2, and the rolls 4 are provided with roll grooves 41. The steel billets 5 are rolled through the roll grooves 41. This rolling method is existing technology and will not be described in detail here.
[0025] The descaling mechanism 9 includes a first support plate 91, a second support plate 92, a support beam 93, a nozzle 94, an adjusting arm 95, an arc-shaped arm 96, a second electric push rod 97, a motor 98, and a worm gear 99. The first support plate 91 has a pair and is fixed to both sides of the transmission mechanism 1. The first support plate 91 has a first guide groove 911 and a second guide groove 912 at both ends, with the first guide groove 911 located on one side of the second guide groove 912. The first support plate 91 also has a main shaft 914, and the adjusting arm 95 is rotatably connected to the main shaft 914. The adjusting arm 95 has a second rotating shaft 951. The top of the first support plate 91 also has a fixedly connected horizontal plate 913. The second support plate 92 has several portions, and the second support plate 92 is rotatably connected to both ends of the nozzle 94, which is located in the first guide groove. Inside 911, the second support plate 92 is provided with a first rotating shaft 921 and a limiting shaft 922, with the limiting shaft 922 located in the second guide groove 912; the second electric push rod 97 is fixed on the horizontal plate 913, and the top shaft of the second electric push rod 97 passes through the horizontal plate 913 and is fixedly connected to the support beam 93, which is located in the first guide groove 911 and fixedly connected to the second support plate 92; the two ends of the arc arm 96 are rotatably connected to the first rotating shaft 921 and the second rotating shaft 951 respectively; the second electric push rod 97 pushes the support beam 93 to rise and fall, and then the arc arm 96 pushes the adjusting arm 95 to rotate around the main shaft 914, thereby causing the arc arm 96 to pull the second support plate 92 to rise and fall along the first guide groove 911 and the second guide groove 912, so that the nozzle 94 is closer to or farther away from the steel billet 5.
[0026] Furthermore, one end of the nozzle 94 is equipped with a rotary joint 943 and a connected water pipe 941, and the other end of the nozzle 94 is equipped with a worm gear 942; the motor 98 is fixed on the second support plate 92 on one side, and the shaft end of the motor 98 is equipped with a bevel gear; both ends of the worm 99 are fixed on the second support plate 92 through bearing seats, the worm 99 meshes with the worm gear 942, and one end of the worm 99 is equipped with a bevel gear that meshes with the bevel gear at the shaft end of the motor 98; the motor 98 drives the worm 99 to rotate, which in turn drives the worm gear 942 to rotate, and finally drives the nozzle 94 to rotate to achieve the adjustment of the spray angle and improve the spray effect; the water pipe is connected to an external water supply device.
[0027] The baffle of the transmission mechanism 1 is provided with a correction mechanism 8, including a push plate 82 and a first electric push rod 81; the push plate 82 is provided with a first guide shaft 822, which is slidably connected to the baffle 101. A plurality of rotatably connected rollers 821 are also provided on one side of the push plate 82. The first electric push rod 81 is fixed on the baffle 101, and the top shaft of the first electric push rod 81 passes through the baffle 101 and is fixedly connected to the push plate 82; the first electric push rod 81 pushes the push plate 82 to make the rollers 821 contact the steel billet 5, thereby correcting the transmission direction of the steel billet 5; the contact of the rollers 821 with the steel billet facilitates the transmission of the steel billet 5.
[0028] The water spraying mechanism 6 is fixed to one side of the rolling mill. The water spraying mechanism includes a mounting plate 61, a mounting block 62, and a water inlet pipe 63. The mounting plate 61 is fixedly connected to the rolling mill. The mounting plate 61 is provided with a sliding groove 64. The mounting block 62 is provided with a screw on one side. The screw is located in the sliding groove 64. The mounting block 62 is fixed to different positions on the mounting plate 61 by means of a nut. The water inlet pipe 63 is fixed on the mounting block 62. The water outlet of the water inlet pipe 63 is aligned with the roll groove 41 on the roll 4 to cool the roll 4. The water inlet pipe is connected to an external water supply device.
[0029] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and 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 of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0030] In the description of this invention, the connection methods are divided into fixed connection and movable connection. Fixed connection methods include, but are not limited to, welding and bolting; movable connection methods include, but are not limited to, sliding connection, rotating connection and threaded connection. The connection method to achieve the desired effect should be selected according to the application of the solution.
[0031] In summary, the electrical components, including but not limited to electric actuators and motors, are existing components that were custom-made or purchased. The electrical connections between these components are conventional circuit or electrical connections in the prior art and are not within the scope of protection of this utility model.
[0032] In summary, the power systems, including but not limited to motors, electric actuators, and their respective transmission systems, are equipped with protective covers according to their actual installation locations to prevent wear or damage to the power and transmission systems caused by the external environment, thereby ensuring the normal operation of the power and transmission systems.
[0033] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.
Claims
1. A hot continuous rolling apparatus for improving the scaling of stainless steel bars with weakened grain boundaries, comprising a conveying mechanism, a rolling mill, a water spraying mechanism, a conveying passage, and a descaling mechanism, wherein the rolling mill includes a horizontal rolling mill and a vertical rolling mill; characterized in that... The conveying mechanism is equipped with conveying rollers for conveying steel billets, and baffles are provided on both sides of the conveying frame of the conveying mechanism; the conveying mechanism is located on one side of the horizontal rolling mill, and the horizontal rolling mill is located on one side of the vertical rolling mill, with several sets of horizontal and vertical rolling mills arranged at intervals; the conveying passage connects the horizontal and vertical rolling mills for conveying steel billets; the water spraying mechanism is located on the horizontal and vertical rolling mills; the descaling mechanism is located on the conveying mechanism for water descaling; the vertical and horizontal rolling mills are equipped with rolling mill rolls, and the rolling mill rolls are provided with roll grooves; The descaling mechanism includes a first support plate, a second support plate, a support beam, a nozzle, an adjusting arm, an arc-shaped arm, a second electric push rod, a motor, and a worm gear. A pair of first support plates are provided and fixed to both sides of the transmission mechanism. The first support plate has a first guide groove and a second guide groove at both ends, with the first guide groove located on one side of the second guide groove. A main shaft is also provided on the first support plate, and the adjusting arm is rotatably connected to the main shaft. A second rotating shaft is provided on the adjusting arm. A fixedly connected horizontal plate is also provided on the top of the first support plate. Several second support plates are provided, and each second support plate is rotatably connected to both ends of the nozzle. The nozzle is located in the first guide groove. The second support plate is provided with a first rotating shaft and a limiting shaft, with the limiting shaft located in the second guide groove. The second electric push rod is fixed on the horizontal plate. The top shaft of the second electric push rod passes through the horizontal plate and is fixedly connected to the support beam. The support beam is located in the first guide groove and is fixedly connected to the second support plate. The two ends of the arc-shaped arm are rotatably connected to the first rotating shaft and the second rotating shaft, respectively. The second electric push rod pushes the support beam to rise and fall, and then the arc-shaped arm pushes the adjusting arm to rotate around the main shaft, thereby causing the arc-shaped arm to pull the second support plate to rise and fall along the first guide groove and the second guide groove.
2. The hot rolling mill for improving grain boundary weakening and scaling of stainless steel bars according to claim 1, characterized in that... One end of the nozzle is equipped with a rotary joint and a connected water pipe, and the other end of the nozzle is equipped with a worm gear; the motor is fixed on a second support plate on one side, and the motor shaft end is equipped with a bevel gear; both ends of the worm are fixed on the second support plate through bearing seats, the worm meshes with the worm gear, and one end of the worm is equipped with a bevel gear that meshes with the bevel gear at the motor shaft end; the water pipe is connected to an external water supply device.
3. A hot rolling mill for improving grain boundary weakening and scaling of stainless steel bars according to claim 1, characterized in that... The conveying mechanism has a correction mechanism on the baffle, including a push plate and a first electric push rod; the push plate has a first guide shaft, which is slidably connected to the baffle. A plurality of rotatably connected rollers are also provided on one side of the push plate. The first electric push rod is fixed on the baffle, and the top shaft of the first electric push rod passes through the baffle and is fixedly connected to the push plate. The first electric push rod pushes the push plate to make the rollers contact the steel billet, thereby correcting the conveying direction of the steel billet.
4. A hot rolling mill for improving grain boundary weakening and scaling of stainless steel bars according to claim 1, characterized in that... The water spraying mechanism is fixed to one side of the rolling mill. The water spraying mechanism includes a mounting plate, a mounting block, and a water inlet pipe. The mounting plate is fixedly connected to the rolling mill and has a sliding groove. The mounting block has a screw on one side, which is located in the sliding groove. The mounting block is fixed at different positions on the mounting plate by means of a nut. The water inlet pipe is fixed on the mounting block and its outlet is aligned with the roll groove on the roll to cool the roll. The water inlet pipe is connected to an external water supply device.