Novel rolling mill special for snakelike rolling of plates and using method of novel rolling mill

Abstract

The invention discloses a novel rolling mill special for snakelike rolling of plates and a using method of the novel rolling mill, and belongs to the technical field of metallurgical equipment. The device comprises a dislocation amount adjusting device, a rack, two screw-down devices and a working roller assembly, the two pressing devices are arranged at the upper part of the rack; and the working roller assembly is fixedly connected with the screw-down device and is in sliding connection with the rack. The dislocation amount adjusting device is in sliding connection with the working roller assembly through a wedge pair, the wedge pair is formed by connecting two wedges in a sliding mode and located on the left side and the right side in the machine frame, the outer side wedge is fixedly connected with the machine frame, and the inner side wedge is in sliding connection with the upper working roller bearing seat. According to the rolling mill, manual fine adjustment can be carried out while the dislocation amount adjusting device is driven through the motor, and compared with a traditional snake-shaped rolling mill for adjusting the dislocation amount through a manual or hydraulic system, the rolling mill has the advantages that the structure is simple, operation is flexible, and the dislocation amount adjusting device is high in response speed, high in efficiency, good in stability and the like, and has the excellent plate shape adjusting and controlling capacity.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical equipment, and in particular to a new rolling mill specially used for serpentine rolling of plates and a use method thereof. Background Art

[0002] A rolling mill is a device that realizes the metal rolling process, and generally refers to equipment that completes the entire process of rolling production. Rolling mills include large and medium-sized rolling mills for production, ordinary rolling mills, and small rolling mills for laboratory use. Serpentine rolling is a rolling process that increases the offset between the upper and lower working rolls along the rolling direction on the basis of asynchronous rolling, and suppresses the post-rolling bending caused by the unequal linear speeds of the upper and lower working rolls during the rolling process through the offset of the upper and lower working rolls.

[0003] In the actual production process of serpentine rolling, the misalignment amount of each pass needs to be adjusted and set. The traditional serpentine rolling mill that uses a hydraulic system to adjust the misalignment amount has a complex hydraulic system structure, requires more hydraulic components and pipelines, has the risk of liquid leakage, is difficult to maintain and inspect, and has high maintenance costs, which can no longer meet the production requirements of serpentine rolling. Therefore, in order to be able to set and adjust the misalignment amount more conveniently and quickly, so as to produce plates with good plate shape and realize the large-scale application of the serpentine rolling process in actual industrial production, the present invention proposes a new type of rolling mill dedicated to serpentine rolling of plates to make up for the shortcomings of existing rolling mills. Summary of the invention

[0004] The purpose of the present invention is to provide a new rolling mill specially used for serpentine rolling of plates and its use method, so as to solve the problems and defects existing in the above-mentioned traditional rolling mills. By adopting this rolling mill, serpentine rolling of plates can be realized and the misalignment amount can be quickly and accurately regulated.

[0005] To achieve the above-mentioned object, the present invention provides a new type of rolling mill specially used for serpentine rolling of plates, comprising a misalignment adjustment device, a frame, two press-down devices and a working roll assembly, wherein the two press-down devices are arranged on the upper part of the frame, the working roll assembly is arranged inside the frame, the working roll assembly comprises an upper working roll assembly and a lower working roll assembly, and the misalignment adjustment device is connected to the press-down device;

[0006] The misalignment adjustment device includes an inclined wedge pair, an adjustment rod, an automatic displacement adjustment mechanism and an encoder. The automatic displacement adjustment mechanism and the encoder are both fixed on the top of the frame. The inclined wedge pair and the adjustment rod are installed inside the frame and connected to the automatic displacement adjustment mechanism.

[0007] Preferably, the upper working roll assembly includes an upper working roll, both ends of which are sleeved with upper bearings, the outer sides of the two upper bearings are respectively sleeved with a first bearing seat and a second bearing seat, the top surfaces of the first bearing seat and the second bearing seat are respectively fixedly connected to the pressing device, the side surfaces of the first bearing seat and the second bearing seat are slidingly connected to the inclined wedge pair, and the bottom surfaces of the first bearing seat and the second bearing seat are slidingly connected to the frame.

[0008] Preferably, the lower working roll assembly comprises a lower working roll, both ends of the lower working roll are sleeved with lower bearings, and the outer sides of the two lower bearings are sleeved with a third bearing seat and a fourth bearing seat respectively;

[0009] A support block is provided at the bottom end of the frame, and the support block is slidably connected to the bottom surfaces of the third bearing seat and the fourth bearing seat.

[0010] Preferably, the four inclined wedge pairs are respectively arranged on the left and right sides of the first bearing seat and the second bearing seat, and each of the inclined wedge pairs includes an inner inclined wedge and an outer inclined wedge;

[0011] The inclined surface inclination angle range of the inclined wedge pair is 2° to 4°, the outer inclined wedge is slidably connected to the inner inclined wedge, a plurality of through holes are provided on the outer inclined wedge, the through holes are fixedly connected to the frame by bolts, and the inner inclined wedge is slidably connected to the first bearing seat and the second bearing seat.

[0012] Preferably, the lower end of the adjusting rod is connected to the upper end of the inner inclined wedge by bolts, the upper end of the adjusting rod is connected to the lower end of the automatic displacement adjustment mechanism by bolts, and the inclined wedge pair realizes manual fine adjustment of the rolling mill misalignment through the adjusting rod.

[0013] Preferably, the automatic displacement adjustment mechanism comprises a reduction motor, a first steering gear, a second steering gear, a third steering gear, a first screw lift, a second screw lift, a third screw lift and a fourth screw lift, the output shaft of the reduction motor is connected to the input shaft of the first steering gear through a coupling, and the output shaft of the first steering gear is respectively connected to the input shafts of the second steering gear and the third steering gear through a coupling;

[0014] The output shaft of the second steering gear is connected to the input shafts of the first and third screw lifts respectively through a synchronizing shaft and a coupling, and the output shaft of the third steering gear is connected to the input shafts of the second and fourth screw lifts respectively through a synchronizing shaft and a coupling.

[0015] Preferably, the power of the first steering gear, the second steering gear and the third steering gear are equal, the screw diameters and pitches of the first screw lift, the second screw lift, the third screw lift and the fourth screw lift are equal, the screw threads of the second screw lift and the fourth screw lift are left-handed, and the screw threads of the first screw lift and the third screw lift are right-handed.

[0016] Preferably, a method for using a new type of rolling mill dedicated to serpentine rolling of plates comprises the following steps:

[0017] S1: Billet preparation: Cut the required stainless steel and carbon steel metal plates as needed, remove the oxide layer and weld them in pairs to prepare stainless steel / carbon steel composite billets;

[0018] S2: Equipment adjustment: According to the misalignment amount, the number of revolutions that the motor output shaft of the misalignment adjustment device needs to run can be calculated. The specific calculation process is:

[0019] S21: First, calculate the axial movement distance h of the screw of the screw lift:

[0020]

[0021] Where: s is the amount of displacement, θ is the inclination angle of the inclined wedge surface in the vertical direction;

[0022] S22: Secondly, calculate the number of revolutions n of the screw lift screw 1 :

[0023]

[0024] Where: P is the screw pitch of the screw lift;

[0025] S23: Finally, calculate the number of revolutions n that the output shaft of the reduction motor needs to run 2 :

[0026] n 2 =n 1 ×i 1 ×i 2 (3);

[0027] Where: i 1 is the reduction ratio of the reduction motor, i 2 is the reduction ratio of the screw lift;

[0028] S3: Rolling: Start the equipment, feed the prepared billet into the feed port in parallel, and cool it after stable rolling;

[0029] S4: End of rolling: After the metal composite plate is rolled, the equipment is shut down and relevant data can be extracted after the metal is completely cooled.

[0030] Therefore, compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) The two-roll rolling mill of the present invention can adjust the amount of reduction and the amount of offset, and can realize serpentine rolling while also realizing multiple rolling methods such as synchronous rolling and asynchronous rolling.

[0032] (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 perform manual fine-tuning while driving the misalignment adjustment device through a motor to achieve serpentine rolling and compounding of metal plates. Compared with the manual adjustment of the misalignment in traditional rolling mills, this saves human resources and avoids the errors that may be caused by manual control of the misalignment.

[0033] (3) The rolling mill of the present invention has a simple structure and flexible operation, and can realize serpentine rolling compounding of metal plates in a variety of environments, and has excellent plate shape control capability.

[0034] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a front view of the overall structure of a new rolling mill embodiment of the present invention which is specially used for serpentine rolling of plates;

[0036] Figure 2 for Figure 1 A partial enlarged view of the automatic displacement adjustment mechanism A shown;

[0037] Figure 3 for Figure 1 The enlarged view of the part of the wedge pair B is shown;

[0038] Figure 4 is a motion diagram of the inclined wedge pair in the present invention;

[0039] Figure 5 It is a left view of the overall structure of a new rolling mill embodiment of the present invention which is specially used for serpentine rolling of plates;

[0040] Figure 6 for Figure 5 The local enlarged view of point C shown;

[0041] Figure 7 It is a top view of the overall structure of a new rolling mill embodiment of the present invention which is specially used for serpentine rolling of plates.

[0042] Reference numerals:

[0043] 1. Dislocation adjustment device; 11. Wedge pair; 1101. Outer wedge; 1102. Inner wedge; 1103. Through hole; 12. Adjustment rod; 13. Automatic displacement adjustment mechanism; 1301. Speed ​​reduction motor; 1302. First steering gear; 1303. Second steering gear; 1304. Third steering gear; 1305. First lead screw lift; 1306. Second lead screw lift; 1307. Third lead screw lift; 1308. Fourth lead screw lift; 14. Encoder; 2. Frame; 3. Upper working roll assembly; 31. Upper working roll; 32. First bearing seat; 33. Second bearing seat; 4. Lower working roll assembly; 41. Lower working roll; 42. Third bearing seat; 43. Fourth bearing seat; 5. Support block; 6. Pressing device. DETAILED DESCRIPTION

[0044] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0045] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] Example

[0047] Reference Figure 1-Figure 7 The present invention provides a new type of rolling mill dedicated to plate serpentine rolling, comprising a misalignment adjustment device 1, a frame 2, two press-down devices 6 and a working roll assembly. The misalignment adjustment device 1 is fixed on the top of the frame 2, the two press-down devices 6 are arranged on the upper part of the frame 2, the working roll assembly is arranged inside the frame 2, and the misalignment adjustment device 1 is connected to the press-down device 6.

[0048] A further preferred solution is that the working roll assembly includes an upper working roll assembly 3 and a lower working roll assembly 4, wherein the upper working roll assembly 3 includes an upper working roll 31, and upper bearings are sleeved at both ends of the upper working roll 31, and the outer sides of the two upper bearings are respectively sleeved with a first bearing seat 32 and a second bearing seat 33, and the top surfaces of the first bearing seat 32 and the second bearing seat 33 are respectively fixed to the two pressing devices 6, and the side surfaces 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, and the bottom surfaces of the first bearing seat 32 and the second bearing seat 33 are slidably connected to the frame 2.

[0049] A further preferred solution is that the lower working roll assembly 4 includes a lower working roll 41, lower bearings are sleeved at both ends of the lower working roll 41, and a third bearing seat 42 and a fourth bearing seat 43 are sleeved on the outer sides of the two lower bearings.

[0050] In a further preferred embodiment, a support block 5 is provided at the bottom end 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 .

[0051] According to a further preferred embodiment, the misalignment adjustment device 1 includes an inclined wedge pair 11, an adjusting rod 12, an automatic displacement adjustment mechanism 13 and an encoder 14, wherein the automatic displacement adjustment mechanism 13 and the encoder 14 are both fixed on the top of the frame 2, and the inclined wedge pair 11 and the adjusting rod 12 are installed inside the frame 2 and connected to the automatic displacement adjustment mechanism 13.

[0052] A further preferred solution is that four inclined wedge pairs 11 are respectively arranged on the left and right sides of the first bearing seat 32 and the second bearing seat 33, and the inclined wedge pairs 11 are composed of two inclined wedges slidingly connected, including an inner inclined wedge 1102 and an outer inclined wedge 1101; a plurality of through holes 1103 are opened on the outer inclined wedge 1101, and the through holes 1103 are connected to the frame 2 by bolts, and the inner inclined wedge 1102 is slidingly connected to the bearing seat of the upper working roll 31.

[0053] A further preferred solution is that the adjusting rod 12 is located inside the frame 2, and 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 respectively connected to the lower ends of the four screw lifts by bolts, so that the rolling mill can manually fine-tune the misalignment amount through the adjusting rod 12.

[0054] A further preferred embodiment is that the automatic displacement adjustment mechanism 13 includes a reduction motor 1301, a first steering gear 1302, a second steering gear 1303, a third steering gear 1304, a first screw lift 1305, a second screw lift 1306, a third screw lift 1307 and a fourth screw lift 1308. The reduction motor 1301 is composed of an electric motor and a reduction gear. The output shaft of the reduction motor 1301 is connected to the input shaft of the first steering gear 1302 through a coupling, and the output shaft of the first steering gear 1302 is respectively connected to the input shafts of the second steering gear 1303 and the third steering gear 1304 through a coupling; the output shaft of the second steering gear 1303 is respectively connected to the input shafts of the first screw lift and the third screw lift 1307 through a synchronous shaft and a coupling, and the output shaft of the third steering gear 1304 is respectively connected to the input shafts of the second screw lift and the fourth screw lift 1308 through a synchronous shaft and a coupling.

[0055] In the embodiment of the present 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 is composed of two wedges slidably connected, including an inner wedge 1102 and an outer wedge 1101, wherein the outer wedge 1101 is fixedly connected to the frame 2 by bolts, and the inner wedge 1102 is slidably connected to the side of the upper bearing seat, and 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 driving the screw lift to adjust the misalignment of the upper working roll 31. At the same time, the first bearing seat 32 and the second bearing seat 33 are installed on the frame 2, and two sets of pressing devices 6 are fixedly connected to the top of the frame 2, and the lower ends thereof are fixedly connected to the tops 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 device 6.

[0056] A specific method for using a new type of rolling mill dedicated to plate serpentine rolling is described. Taking stainless steel / carbon steel serpentine rolling composite as an example, the misalignment amount is required to be 10 mm. The specific implementation steps are as follows:

[0057] The vertical inclination angle θ of the inclined wedge surface in this embodiment is 4°, wherein the rated speed of the motor is 1450r / min, the reducer model is DLR05, and the reduction ratio is 10; wherein the screw pitch of the first screw lift, the second screw lift, the third screw lift, and the fourth screw lift are all 18mm, and the reduction ratio is 10, and at the same time, the screw threads of the first screw lift and the third screw lift are left-handed, and the screw threads of the second screw lift and the fourth screw lift are right-handed, that is, when the first screw lift and the third screw lift drive the inner inclined wedge of the corresponding inclined wedge pair to rise a certain distance, the second screw lift and the fourth screw lift synchronously drive the inner inclined wedge of the inclined wedge pair to fall the same distance, and vice versa. Thus, the upper working roll is dislocated to achieve the effect of serpentine rolling.

[0058] The first step is blank preparation. The required stainless steel and carbon steel metal plates are cut as needed, and after removing the oxide layer, they are welded in pairs to prepare stainless steel / carbon steel composite blanks.

[0059] The second step is equipment adjustment. Figure 1 The E direction shown is the feed port, and the lower working roll is set as a low-speed roll. According to the experimental requirements, the pressing amount is adjusted by the pressing device, and the misalignment adjustment device is started to adjust the misalignment.

[0060] The misalignment is known to be 10 mm. According to formula (1), the axial movement distance of the screw of the screw lift can be obtained as:

[0061]

[0062] According to formula (2), the number of revolutions of the screw of the screw lift can be obtained:

[0063]

[0064] According to formula (3), the number of revolutions of the output shaft of the reduction motor can be obtained, and then the running time of the reduction motor at the rated speed can be obtained:

[0065] n 2 =7.94×10×10=794r

[0066]

[0067] During use, enter the corresponding code in the encoder to drive the first and third screw lifts to descend the corresponding height h, and the second and fourth screw lifts to rise synchronously to the same height h, so that the upper working roller moves horizontally to the right to adjust the misalignment amount, and the required working conditions are adjusted in advance.

[0068] The third step is rolling. Start the equipment and feed the prepared billet into the feed port in parallel. After stable rolling, cool it down.

[0069] Step 4: End rolling. After the metal composite plate is rolled, shut down the equipment and wait for the metal to cool completely before extracting relevant data.

[0070] Therefore, the present invention adopts a new type of rolling mill with the above structure that is specially used for serpentine rolling of plates. While the misalignment adjustment device is driven by a motor, the misalignment can be manually fine-tuned through an adjusting rod. Compared with the traditional serpentine rolling mill that uses manual or hydraulic systems to adjust the misalignment, it has the advantages of simple structure, flexible operation, fast response speed of the misalignment adjustment device, high efficiency, good stability, etc., and has excellent plate shape control capabilities.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A new type of rolling mill specially used for serpentine rolling of plates, characterized by: It comprises a misalignment adjustment device, a frame, two pressing devices and a working roll assembly, wherein the two pressing devices are arranged on the upper part of the frame, the working roll assembly is arranged inside the frame, the working roll assembly comprises an upper working roll assembly and a lower working roll assembly, and the misalignment adjustment device is connected to the pressing device; The misalignment adjustment device includes an inclined wedge pair, an adjustment rod, an automatic displacement adjustment mechanism and an encoder. The automatic displacement adjustment mechanism and the encoder are both fixed on the top of the frame. The inclined wedge pair and the adjustment rod are installed inside the frame and connected to the automatic displacement adjustment mechanism.

2. A new type of rolling mill specially used for serpentine rolling of plates according to claim 1, characterized in that: The upper working roll assembly includes an upper working roll, both ends of which are sleeved with upper bearings, and the outer sides of the two upper bearings are respectively sleeved with a first bearing seat and a second bearing seat, the top surfaces of the first bearing seat and the second bearing seat are respectively fixedly connected to the pressing device, the side surfaces of the first bearing seat and the second bearing seat are slidably connected to the inclined wedge pair, and the bottom surfaces of the first bearing seat and the second bearing seat are slidably connected to the frame.

3. A new type of rolling mill specially used for serpentine rolling of plates according to claim 2, characterized in that: The lower working roll assembly comprises a lower working roll, both ends of the lower working roll are sleeved with lower bearings, and the outer sides of the two lower bearings are sleeved with a third bearing seat and a fourth bearing seat respectively; A support block is provided at the bottom end of the frame, and the support block is slidably connected to the bottom surfaces of the third bearing seat and the fourth bearing seat.

4. A new type of rolling mill specially used for serpentine rolling of plates according to claim 3, characterized in that: The four inclined wedge pairs are respectively arranged on the left and right sides of the first bearing seat and the second bearing seat, and each of the inclined wedge pairs includes an inner inclined wedge and an outer inclined wedge; The inclined surface inclination angle range of the inclined wedge pair is 2° to 4°, the outer inclined wedge is slidably connected to the inner inclined wedge, a plurality of through holes are provided on the outer inclined wedge, the through holes are fixedly connected to the frame by bolts, and the inner inclined wedge is slidably connected to the first bearing seat and the second bearing seat.

5. A new type of rolling mill specially used for serpentine rolling of plates according to claim 4, characterized in that: The lower end of the adjusting rod is connected to the upper end of the inner inclined wedge by bolts, and the upper end of the adjusting rod is connected to the lower end of the automatic displacement adjustment mechanism by bolts. The inclined wedge pair can manually fine-tune the dislocation of the rolling mill through the adjusting rod.

6. A new type of rolling mill specially used for serpentine rolling of plates according to claim 5, characterized in that: The automatic displacement adjustment mechanism comprises a reduction motor, a first steering gear, a second steering gear, a third steering gear, a first screw lift, a second screw lift, a third screw lift and a fourth screw lift, the output shaft of the reduction motor is connected to the input shaft of the first steering gear through a coupling, and the output shaft of the first steering gear is connected to the input shafts of the second steering gear and the third steering gear through couplings respectively; The output shaft of the second steering gear is connected to the input shafts of the first and third screw lifts respectively through a synchronizing shaft and a coupling, and the output shaft of the third steering gear is connected to the input shafts of the second and fourth screw lifts respectively through a synchronizing shaft and a coupling.

7. A new type of rolling mill specially used for serpentine rolling of plates according to claim 6, characterized in that: The power of the first steering gear, the second steering gear and the third steering gear is equal, the screw diameter and pitch of the first screw lift, the second screw lift, the third screw lift and the fourth screw lift are equal, the screw threads of the second screw lift and the fourth screw lift are left-handed, and the screw threads of the first screw lift and the third screw lift are right-handed.

8. A method for using a new type of rolling mill specially used for serpentine rolling of plates as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1: Billet preparation: Cut the required stainless steel and carbon steel metal plates as needed, remove the oxide layer and weld them in pairs to prepare stainless steel / carbon steel composite billets; S2: Equipment adjustment: According to the misalignment amount, calculate the number of revolutions that the motor output shaft of the misalignment adjustment device needs to run. The specific calculation process is: S21: First, calculate the axial movement distance h of the screw of the screw lift: Where: s is the amount of displacement, θ is the inclination angle of the inclined wedge surface in the vertical direction; S22: Secondly, calculate the number of revolutions n1 of the screw lift screw: Where: P is the screw pitch of the screw lift; S23: Finally, calculate the number of revolutions n2 that the output shaft of the reduction motor needs to run: n2=n1×i1×i2(3); Among them: i1 is the reduction ratio of the reduction motor, i2 is the reduction ratio of the screw lift; S3: Rolling: Start the equipment, feed the prepared billet into the feed port in parallel, and cool it after stable rolling; S4: End of rolling: After the metal composite plate is rolled, the equipment is shut down and relevant data can be extracted after the metal is completely cooled.

Images