A new type of rolling mill and its use method dedicated to serpentine rolling of sheet material

Abstract

The application discloses a novel rolling mill special for plate serpentine rolling and a use method thereof, and belongs to the technical field of metallurgical equipment. The rolling mill comprises a dislocation amount adjusting device, a rack, two screwdown devices and a working roller assembly; the two screwdown devices are arranged on the upper portion of the rack; the working roller assembly is fixedly connected with the screwdown devices and is slidably connected with the rack. The dislocation amount adjusting device is slidably connected with the working roller assembly through a wedge pair, the wedge pair is composed of two wedges and is arranged on the left side and the right side in the rack, the outer wedge is fixedly connected with the rack, and the inner wedge is slidably connected with the upper working roller bearing seat. The rolling mill can be manually fine adjusted while driving the dislocation amount adjusting device by a motor, and compared with a conventional serpentine rolling mill which adjusts the dislocation amount by using a manual or hydraulic system, the rolling mill has the advantages of simple structure, flexible operation, fast response speed of the dislocation amount adjusting device, high efficiency, good stability and the like, and has excellent plate shape regulation and control capacity.

Description

Technical Field

[0001] This invention relates to the field of metallurgical equipment technology, and in particular to a novel rolling mill specifically designed for serpentine rolling of sheet metal and its method of use. Background Technology

[0002] A rolling mill is a piece of equipment used to perform the metal rolling process; broadly speaking, it refers to the equipment that completes the entire process of rolling material production. Rolling mills include large and medium-sized rolling mills used in production, ordinary rolling mills, and small rolling mills used in laboratories.

[0003] Snake rolling is a rolling process that adds offset between the upper and lower work rolls along the rolling direction on the basis of asynchronous rolling. The offset between the upper and lower work rolls suppresses the bending after rolling caused by the unequal linear speed of the upper and lower work rolls during the rolling process.

[0004] In actual production, serpentine rolling requires adjusting the misalignment amount for each pass. Traditional serpentine rolling mills, which utilize hydraulic systems for misalignment adjustment, have complex hydraulic structures, require numerous hydraulic components and pipelines, pose a risk of fluid leakage, and are difficult and costly to maintain and inspect, thus failing to meet the production requirements of serpentine rolling. Therefore, to enable more convenient and rapid setting and adjustment of the misalignment amount, thereby producing plates with good shape and realizing the large-scale application of serpentine rolling technology in actual industrial production, this invention proposes a novel rolling mill specifically for serpentine rolling of plates to overcome the shortcomings of existing rolling mills. Summary of the Invention

[0005] The purpose of this invention is to provide a novel rolling mill and its method of use specifically for serpentine rolling of sheet metal, in order to solve the problems and defects of the traditional rolling mill. By using this rolling mill, serpentine rolling of sheet metal can be achieved and the misalignment can be quickly and accurately controlled.

[0006] To achieve the above objectives, the present invention provides a novel rolling mill specifically for serpentine rolling of sheet metal, comprising a misalignment adjustment device, a frame, two pressing devices, and a work roll assembly. The two pressing devices are disposed on the upper part of the frame, and the work roll assembly is disposed inside the frame. The work roll assembly includes an upper work roll assembly and a lower work roll assembly. The misalignment adjustment device includes a wedge pair, an adjusting rod, an automatic displacement adjustment mechanism, and an encoder. The automatic displacement adjustment mechanism and the encoder are both fixed to the top of the frame. The wedge pair and the adjusting rod are installed inside the frame and connected to the automatic displacement adjustment mechanism. The upper working roll assembly includes an upper working roll, with upper bearings sleeved at both ends of the upper working roll. A first bearing seat and a second bearing seat are respectively sleeved on the outer sides of the two upper bearings. The top surfaces of the first bearing seat and the second bearing seat are fixedly connected to the pressing device. The sides of the first bearing seat and the second bearing seat are slidably connected to the wedge pair. The bottom surfaces of the first bearing seat and the second bearing seat are slidably connected to the frame. The lower working roller assembly includes a lower working roller, with lower bearings sleeved at both ends of the lower working roller, and a third bearing seat and a fourth bearing seat respectively sleeved on the outer side of the two lower bearings; a support block is provided at the bottom end of the frame, and the support block is slidably connected to the bottom surface of the third bearing seat and the fourth bearing seat; The four wedge pairs are respectively disposed on the left and right sides of the first bearing seat and the second bearing seat. Each wedge pair includes an inner wedge and an outer wedge. The inclination angle of the wedge pair is in the range of 2° to 4°. The outer wedge is slidably connected to the inner wedge. The outer wedge is provided with several through holes. The through holes are fixedly connected to the frame by bolts. The inner wedge is slidably connected to the first bearing seat and the second bearing seat. The lower end of the adjusting rod is connected to the upper end of the inner wedge by bolts, and the upper end of the adjusting rod is connected to the lower end of the automatic displacement adjusting mechanism by bolts. The wedge pair enables manual fine adjustment of the mill misalignment through the adjusting rod. The automatic displacement adjustment mechanism includes a geared motor, a first steering gear, a second steering gear, a third steering gear, a first lead screw jack, a second lead screw jack, a third lead screw jack, and a fourth lead screw jack. The output shaft of the geared motor is connected to the input shaft of the first steering gear via a coupling. The output shaft of the first steering gear is connected to the input shafts of the second steering gear and the third steering gear via couplings. The output shaft of the second steering gear is connected to the input shafts of the first lead screw jack and the third lead screw jack via a synchronous shaft and a coupling. The output shaft of the third steering gear is connected to the input shafts of the second lead screw jack and the fourth lead screw jack via a synchronous shaft and a coupling. The power of the first steering gear, the second steering gear, and the third steering gear are equal. The screw diameter and pitch of the first screw jack, the second screw jack, the third screw jack, and the fourth screw jack are equal. The screw threads of the first screw jack and the third screw jack are left-handed, while the screw threads of the second screw jack and the fourth screw jack are right-handed. When the first and third screw jacks drive the inner wedges of their respective wedge pairs to rise a certain distance, the second and fourth screw jacks simultaneously drive the inner wedges of their wedge pairs to fall the same distance, and vice versa, thereby causing the upper work rolls to be misaligned to achieve the effect of serpentine rolling.

[0007] Therefore, compared with the prior art, this invention patent has the following beneficial effects; (1) The present invention uses a two-roll mill to adjust the reduction and misalignment, and can realize serpentine rolling as well as synchronous rolling, asynchronous rolling and other rolling methods.

[0008] (2) The misalignment adjustment device in the rolling mill provided by the present invention can automatically adjust the misalignment as needed. The rolling mill can also be manually fine-tuned while driving the misalignment adjustment device by motor, so as to realize the serpentine rolling composite of metal plates. Compared with the traditional rolling mill manual adjustment of misalignment, it saves human resources and avoids the errors that may be caused by manual adjustment of misalignment.

[0009] (3) The rolling mill in this invention has a simple structure and flexible operation. It can realize the serpentine rolling composite of metal plates in various environments and has excellent plate shape control capability.

[0010] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0011] Figure 1 This is a front view of the overall structure of a novel rolling mill embodiment of the present invention specifically for serpentine rolling of sheet metal; Figure 2 for Figure 1 A magnified view of part A of the automatic displacement adjustment mechanism shown; Figure 3 for Figure 1 A magnified view of a portion of the wedge joint at point B shown; Figure 4 This is a simplified kinematic diagram of the wedge pair in this invention; Figure 5 This is a left view of the overall structure of a novel rolling mill embodiment of the present invention specifically for serpentine rolling of sheet metal; Figure 6 for Figure 5 The enlarged view of point C shown; Figure 7 This is a top view of the overall structure of a novel rolling mill embodiment of the present invention specifically for serpentine rolling of sheet metal.

[0012] Figure label: 1. Misalignment adjustment device; 11. Wedge pair; 1101. Outer wedge; 1102. Inner wedge; 1103. Through hole; 12. Adjusting rod; 13. Automatic displacement adjustment mechanism; 1301. Gear motor; 1302. First steering gear; 1303. Second steering gear; 1304. Third steering gear; 1305. First lead screw jack; 1306. Second lead screw jack; 1307. Third lead screw jack; 1308. Fourth lead screw jack; 14. Encoder; 2. Frame; 3. Upper work roll assembly; 31. Upper work roll; 32. First bearing seat; 33. Second bearing seat; 4. Lower work roll assembly; 41. Lower work roll; 42. Third bearing seat; 43. Fourth bearing seat; 5. Support block; 6. Pressing device. Detailed Implementation

[0013] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0015] Example Reference Figures 1-7 This invention provides a novel rolling mill specifically for serpentine rolling of sheet metal, comprising a misalignment adjustment device 1, a frame 2, two pressing devices 6, and a work roll assembly. The misalignment adjustment device 1 is fixed to the top of the frame 2, the two pressing devices 6 are disposed on the upper part of the frame 2, and the work roll assembly is disposed inside the frame 2, connecting the misalignment adjustment device 1 to the pressing devices 6.

[0016] In a further preferred embodiment, the working roller assembly includes an upper working roller assembly 3 and a lower working roller assembly 4. The upper working roller assembly 3 includes an upper working roller 31, and upper bearings are sleeved at both ends of the upper working roller 31. A first bearing seat 32 and a second bearing seat 33 are respectively sleeved on the outer side of the two upper bearings. The top surfaces of the first bearing seat 32 and the second bearing seat 33 are respectively fixed to two pressing devices 6. The sides of the first bearing seat 32 and the second bearing seat 33 are slidably connected to the inner wedge 1102 in the wedge pair 11. The bottom surfaces of the first bearing seat 32 and the second bearing seat 33 are slidably connected to the frame 2.

[0017] In a further preferred embodiment, the lower working roller assembly 4 includes a lower working roller 41, with lower bearings sleeved at both ends of the lower working roller 41, and a third bearing seat 42 and a fourth bearing seat 43 respectively sleeved on the outer sides of the two lower bearings.

[0018] In a further optimized design, a support block 5 is provided at the bottom of the frame 2, and the support block 5 is slidably connected to the bottom surfaces of the third bearing seat 42 and the fourth bearing seat 43.

[0019] In a further preferred embodiment, the misalignment adjustment device 1 includes a wedge pair 11, an adjusting rod 12, an automatic displacement adjustment mechanism 13, and an encoder 14. The automatic displacement adjustment mechanism 13 and the encoder 14 are both fixed on the top of the frame 2. The wedge pair 11 and the adjusting rod 12 are installed inside the frame 2 and connected to the automatic displacement adjustment mechanism 13.

[0020] In a further preferred embodiment, four wedge pairs 11 are respectively disposed on the left and right sides of the first bearing seat 32 and the second bearing seat 33. Each wedge pair 11 is composed of two wedges slidably connected together, including an inner wedge 1102 and an outer wedge 1101. Several through holes 1103 are opened on the outer wedge 1101, and the through holes 1103 are connected to the frame 2 by bolts. The inner wedge 1102 is slidably connected to the bearing seat of the upper work roller 31.

[0021] In a further optimized design, the adjusting rod 12 is located inside the frame 2. The lower end of the adjusting rod 12 is connected to the upper end of the inner inclined wedge 1102 by bolts, and the upper end of the adjusting rod 12 is connected to the lower ends of the four screw jacks by bolts, so that the mill can manually fine-tune the misalignment through the adjusting rod 12.

[0022] In a further preferred embodiment, the automatic displacement adjustment mechanism 13 includes a geared motor 1301, a first steering gear 1302, a second steering gear 1303, a third steering gear 1304, a first screw jack 1305, a second screw jack 1306, a third screw jack 1307, and a fourth screw jack 1308. The geared motor 1301 consists of a motor and a reducer. The output shaft of the geared motor 1301 is connected to the input shaft of the first steering gear 1302 via a coupling. The output shaft of the first steering gear 1302 is connected to the input shafts of the second steering gear 1303 and the third steering gear 1304 via couplings. The output shaft of the second steering gear 1303 is connected to the input shafts of the first screw jack and the third screw jack 1307 via a synchronous shaft and a coupling. The output shaft of the third steering gear 1304 is connected to the input shafts of the second screw jack and the fourth screw jack 1308 via a synchronous shaft and a coupling.

[0023] In this embodiment of the invention, the specific working principle is as follows: Four wedge pairs 11 are respectively arranged on the left and right sides of the first bearing seat 32 and the second bearing seat 33. Each wedge pair 11 consists of two wedges slidably connected, including an inner wedge 1102 and an outer wedge 1101. The outer wedge 1101 is fixed to the frame 2 by bolts, and the inner wedge 1102 is slidably connected to the side of the upper bearing seat. The misalignment adjustment device 1 is powered by a reduction motor 1301, and the height of the inner wedge 1102 in the wedge pair 11 is controlled by a drive screw jack to adjust the misalignment of the upper work roller 31. At the same time, the first bearing seat 32 and the second bearing seat 33 are mounted on the frame 2, and two sets of pressing devices 6 are fixedly connected to the top of the frame 2, with their lower ends fixedly connected to the top of the first bearing seat 32 and the second bearing seat 33. The pressing amount is adjusted by pushing the first bearing seat 32 and the second bearing seat 33 downward by the pressing devices 6.

[0024] A specific method for using a new type of rolling mill specifically designed for serpentine rolling of sheet metal, taking stainless steel / carbon steel serpentine rolling composite as an example, requires a misalignment of 10mm. The specific implementation steps are as follows: In this embodiment, the vertical inclination angle θ of the wedge surface is 4°. The selected motor has a rated speed of 1450 r / min, and the reducer is model DLR05 with a reduction ratio of 10. The screw pitch of the first, second, third, and fourth screw jacks is 18 mm, with a reduction ratio of 10. The screw threads of the first and third screw jacks are left-handed, while those of the second and fourth screw jacks are right-handed. That is, when the first and third screw jacks raise the corresponding inner wedges of their respective wedge pairs a certain distance, the second and fourth screw jacks simultaneously lower the inner wedges of their respective wedge pairs by the same distance, and vice versa. This causes the upper work roll to misalign, achieving a serpentine rolling effect.

[0025] The first step is billet preparation. The required stainless steel and carbon steel metal plates are cut as needed, and after removing the oxide layer, they are combined and welded in pairs to prepare stainless steel / carbon steel composite billets.

[0026] The second step is equipment adjustment. For example... Figure 1 The direction E shown is the feed inlet, and the lower working roller is set to low speed. According to experimental requirements, the pressing amount is adjusted via the pressing device, and the misalignment adjustment device is activated to adjust the misalignment.

[0027] Given that the misalignment is 10mm, the axial movement distance of the screw in the screw jack can be obtained according to formula (1): mm According to equation (2), the number of rotations of the lead screw in the screw jack can be obtained: r According to equation (3), the number of rotations of the output shaft of the geared motor can be obtained, and then the running time of the geared motor at its rated speed can be obtained: r min During use, the corresponding code is input into the encoder to drive the first and third lead screw jacks to descend by the corresponding height h, while the second and fourth lead screw jacks rise synchronously to the same height h, thereby causing the upper working roller to move to the right to adjust the misalignment and adjust the required working conditions in advance.

[0028] The third step is rolling. Start the equipment and feed the prepared billet parallel into the feed inlet. After stable rolling, it is cooled.

[0029] The fourth step is to finish rolling. After the metal composite plate is rolled, the equipment is shut down, and the relevant data can be extracted after the metal has completely cooled.

[0030] Therefore, the present invention provides a novel rolling mill specifically designed for serpentine rolling of sheet metal using the above-mentioned structure. While the misalignment adjustment device is driven by a motor, the misalignment can also be manually fine-tuned by an adjustment rod. Compared with traditional serpentine rolling mills that use manual or hydraulic systems to adjust the misalignment, this invention has advantages such as simple structure, flexible operation, fast response speed of the misalignment adjustment device, high efficiency, and good stability, and possesses excellent sheet shape control capabilities.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A novel rolling mill specifically designed for serpentine rolling of sheet metal, characterized in that: It includes a misalignment adjustment device, a frame, two pressing devices and a work roll assembly. The two pressing devices are located on the upper part of the frame, and the work roll assembly is located inside the frame. The work roll assembly includes an upper work roll assembly and a lower work roll assembly. The misalignment adjustment device includes a wedge pair, an adjusting rod, an automatic displacement adjustment mechanism, and an encoder. The automatic displacement adjustment mechanism and the encoder are both fixed to the top of the frame. The wedge pair and the adjusting rod are installed inside the frame and connected to the automatic displacement adjustment mechanism. The upper working roll assembly includes an upper working roll, with upper bearings sleeved at both ends of the upper working roll. A first bearing seat and a second bearing seat are respectively sleeved on the outer sides of the two upper bearings. The top surfaces of the first bearing seat and the second bearing seat are fixedly connected to the pressing device. The sides of the first bearing seat and the second bearing seat are slidably connected to the wedge pair. The bottom surfaces of the first bearing seat and the second bearing seat are slidably connected to the frame. The lower working roller assembly includes a lower working roller, with lower bearings sleeved at both ends of the lower working roller, and a third bearing seat and a fourth bearing seat respectively sleeved on the outer side of the two lower bearings; a support block is provided at the bottom end of the frame, and the support block is slidably connected to the bottom surface of the third bearing seat and the fourth bearing seat; The four wedge pairs are respectively disposed on the left and right sides of the first bearing seat and the second bearing seat. Each wedge pair includes an inner wedge and an outer wedge. The inclination angle of the wedge pair is in the range of 2° to 4°. The outer wedge is slidably connected to the inner wedge. The outer wedge is provided with several through holes. The through holes are fixedly connected to the frame by bolts. The inner wedge is slidably connected to the first bearing seat and the second bearing seat. The lower end of the adjusting rod is connected to the upper end of the inner wedge by bolts, and the upper end of the adjusting rod is connected to the lower end of the automatic displacement adjusting mechanism by bolts. The wedge pair enables manual fine adjustment of the mill misalignment through the adjusting rod. The automatic displacement adjustment mechanism includes a geared motor, a first steering gear, a second steering gear, a third steering gear, a first lead screw jack, a second lead screw jack, a third lead screw jack, and a fourth lead screw jack. The output shaft of the geared motor is connected to the input shaft of the first steering gear via a coupling. The output shaft of the first steering gear is connected to the input shafts of the second steering gear and the third steering gear via couplings. The output shaft of the second steering gear is connected to the input shafts of the first lead screw jack and the third lead screw jack via a synchronous shaft and a coupling. The output shaft of the third steering gear is connected to the input shafts of the second lead screw jack and the fourth lead screw jack via a synchronous shaft and a coupling. The power of the first steering gear, the second steering gear, and the third steering gear are equal. The screw diameter and pitch of the first screw jack, the second screw jack, the third screw jack, and the fourth screw jack are equal. The screw threads of the first screw jack and the third screw jack are left-handed, while the screw threads of the second screw jack and the fourth screw jack are right-handed. When the first and third screw jacks drive the inner wedges of their respective wedge pairs to rise a certain distance, the second and fourth screw jacks simultaneously drive the inner wedges of their wedge pairs to fall the same distance, and vice versa, thereby causing the upper work rolls to be misaligned to achieve the effect of serpentine rolling.

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