Small roll high speed pinch device for strip

Abstract

The application discloses a small roller diameter high-speed pinch equipment for a strip steel, and relates to the technical field of strip steel production, in particular to a small roller diameter high-speed pinch equipment for a strip steel.

Description

Technical Field

[0001] This invention relates to strip steel production equipment, and particularly to a high-speed clamping device for small-diameter strip steel. Background Technology

[0002] Steel strip is a narrow and long steel plate with a relatively thin thickness, produced by various steel rolling mills to meet the needs of industrialized production of various metal or mechanical products in different industrial sectors. Steel strip, also known as steel strip, has a width of less than 1300mm, and the length varies slightly depending on the size of each coil.

[0003] For already coiled strip steel, if the required width is desired, the strip steel needs to be cut. For example, if the required strip steel width is 1000mm, for a 1300mm strip steel, 300mm needs to be cut off by a disc shear. For this operation, the uncut steel coil is usually installed on an uncoiler, and the strip steel passes through the clamping device.

[0004] The clamping equipment includes a starting clamping mechanism, a stabilizing mechanism, a main clamping mechanism, and an exit clamping mechanism. The disc shear is located between the stabilizing mechanism and the main clamping mechanism. The steel coil is loaded onto the uncoiler, and the strip head passes through the starting clamping mechanism, the stabilizing mechanism, the disc shear, the main clamping mechanism, and the exit clamping mechanism in sequence. The strip head finally reaches the coiler. The strip steel on the uncoiler is released under the action of the clamping equipment. When the strip steel passes through the disc shear, the disc shear cuts the edges according to the set size. Finally, the coiler rewinds the strip steel.

[0005] In the clamping equipment, the initial clamping mechanism includes a first frame, a first clamping roller group, and a first driver. The first clamping roller group is mounted on the first frame, and the first driver is connected to the first clamping roller group. The stabilizing mechanism includes a second frame, a first stabilizing roller group, and a second driver. The first stabilizing roller group is mounted on the second frame, and the second driver is connected to the first stabilizing roller group. The main clamping mechanism includes a third frame, a second clamping roller group, and a third driver. The second clamping roller group is mounted on the third frame, and the third driver is connected to the second clamping roller group. The exit clamping mechanism includes a fourth frame, a third clamping roller group, a fourth driver, and a lifting pressure roller group. The third clamping roller group is mounted on the fourth frame, and the fourth driver is connected to the third clamping roller group. The lifting pressure roller group is mounted on the fourth frame and located downstream of the third clamping roller group.

[0006] For the aforementioned pinching and conveying equipment, the outer diameter of each roller in the first pinching roller group is 500mm, the outer diameter of each roller in the first stabilizing roller group is 300mm, the outer diameter of each roller in the second pinching roller group is 350mm, and the outer diameter of each roller in the third pinching roller group is 400mm. Due to the large roller diameter, the entire pinching and conveying equipment is long, consumes a lot of power, and has low conveying efficiency (about 400mm per minute). It is also prone to causing the strip to shake during the pinching and conveying process, resulting in poor stability of the entire equipment. Summary of the Invention

[0007] This invention provides a high-speed clamping device for small-diameter strip steel, which can reduce energy consumption and improve operating efficiency.

[0008] The technical solutions to the above technical problems are as follows:

[0009] High-speed clamping equipment for small-diameter strip steel includes:

[0010] The starting clamping mechanism includes a first frame, a first clamping roller group, and a first driver. The first clamping roller group is mounted on the first frame, and the first driver is connected to the first clamping roller group.

[0011] The stabilization mechanism includes a second frame, a first stabilizing roller group, and a second driver. The first stabilizing roller group is mounted on the second frame, and the second driver is connected to the first stabilizing roller group.

[0012] The main clamping mechanism includes a third frame, a second clamping roller group, and a third driver. The second clamping roller group is mounted on the third frame, and the third driver is connected to the second clamping roller group.

[0013] The outlet pinching mechanism includes a fourth frame, a third pinching roller group, a fourth driver, and a lifting pressure roller group. The third pinching roller group is mounted on the fourth frame, the fourth driver is connected to the third pinching roller group, and the lifting pressure roller group is mounted on the fourth frame and located downstream of the third pinching roller group.

[0014] The diameter D of the roller surface of the first pinch roller group, the first stabilizing roller group, the second pinch roller group, and the third pinch roller group is 200-250mm.

[0015] The present invention has the following advantages:

[0016] 1. Shortening the unit length increases the stability of the equipment at high speeds.

[0017] 2. Significantly reduce energy consumption.

[0018] 3. The pinch rollers are standardized into a single structure, which facilitates maintenance, standardizes spare parts, and saves on equipment investment and spare parts costs;

[0019] 4. Reduce floor space and improve operational efficiency. Attached Figure Description

[0020] Figure 1 A perspective view of the high-speed clamping device for small-diameter strip steel in this invention.

[0021] Figure 2 This is a 3D diagram of the initial clamping mechanism.

[0022] Figure 3 This is a schematic diagram showing the initial clamping mechanism with some parts hidden.

[0023] Figure 4 A three-dimensional diagram of the stabilizing mechanism.

[0024] Figure 5 The main view of the stabilizing mechanism.

[0025] Figure 6 This is a perspective view of the second support mechanism, the second upper stabilizing roller assembly, and the second lower stabilizing roller assembly.

[0026] Figure 7 This is a front view of the second upper stabilizing roller assembly and the second lower stabilizing roller assembly.

[0027] Figure 8 This is a perspective view of the second upper stabilizing roller assembly and the second lower stabilizing roller assembly.

[0028] Figure 9 A three-dimensional view of the main clamping mechanism.

[0029] Figure 10 This is a three-dimensional view of the export conveying mechanism in the first direction.

[0030] Figure 11 This is a three-dimensional view of the export conveying mechanism in the second direction.

[0031] Labels in the attached diagram:

[0032] The components include: a first clamping mechanism A, a first frame 11, a first clamping roller group 12, a first upper clamping roller 12a, a first lower clamping roller 12b, a first upper bearing seat assembly 12c, a first lower bearing seat assembly 12d, a first lifting driver 12e, a first driver 13, a first driving component 14, a swing assembly 15, a swing arm 15a, a swing bracket 15b, a swing driver 15c, a magnetic belt drive mechanism 15d, a first knife holder 16, a first cutter 17, a first cutting driver 18, a first knife holder 18a, and a first hydraulic cylinder 18b.

[0033] Stabilizing mechanism B, base 21a, first support mechanism 21b, fixed seat 21b1, movable frame 21b2, driving component 21b3, first lower stabilizing roller assembly 22a, first upper stabilizing roller assembly 22b, second driver 23, second support mechanism 24, bracket 24a, sliding seat 24b, lifting driver 24c, support body 24d, adjusting seat 24e, adjusting screw 24f, linear guide rail 24g, slider 24h, second upper stabilizing roller assembly 25, second upper stabilizing roller 25a, third bearing seat assembly 25b, second lower stabilizing roller assembly 26, second lower stabilizing roller 26a, fourth bearing seat assembly 26b, adjusted seat 26c, mounting seat 27a, frame 27b, guide frame 27c, guide wheel 27d, swing driving component 27e, second center O2, first center O1, first vertical line P1, second vertical line P2.

[0034] The main clamping mechanism C, the third frame 31, the second clamping roller group 32, the second upper clamping roller 32a, the second lower clamping roller 32b, the second upper bearing seat assembly 32c, the second lower bearing seat assembly 32d, the second lifting drive 32e, the third drive 33, the second drive component 34, the guide bracket 35, the guide roller 36, and the second cutting assembly 37.

[0035] The components include: an outlet clamping mechanism D, a fourth frame 41, a third clamping roller group 42, a third upper clamping roller 42a, a third lower clamping roller 42b, a third upper bearing housing assembly 42c, a third lower bearing housing assembly 42d, a third lifting drive 42e, a fourth drive 43, a lifting drive mechanism 44, a bearing housing assembly 45, a pressure roller 46, a rotating frame 47, a platform 48, and a rotating drive 49. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0037] like Figures 1 to 11 As shown, the high-speed pinching device for small-diameter strip steel in this embodiment includes: a starting pinching mechanism A, a stabilizing mechanism B, a main pinching mechanism C, and an exit pinching mechanism D. Each part and the relationship between them will be described in detail below.

[0038] The initial clamping mechanism A includes a first frame 11, a first clamping roller assembly 12, and a first driver 13. The first clamping roller assembly 12 is mounted on the first frame 11, and the first driver 13 is connected to the first clamping roller assembly 12. The first clamping roller assembly 12 includes a first upper clamping roller 12a, a first lower clamping roller 12b, a first upper bearing housing assembly 12c, a first lower bearing housing assembly 12d, and a first lifting driver 12e. Both ends of the first upper clamping roller 12a are connected to the first upper bearing housing assembly 12c, which is slidably engaged with the first frame 11. The first lifting driver 12e is fixed to the first frame 11, and its power output end is connected to the first upper bearing housing assembly 12c. The first lower clamping roller 12b is connected to the first lower bearing housing assembly 12d, which is also fixed to the first frame 11. The first driver 13 is connected to the first lower clamping roller 12b via a universal coupling, and preferably uses a motor.

[0039] The initial clamping mechanism A also includes a first drive component 14, which is connected to the first upper clamping roller 12a via a universal coupling. The first drive component 14 is preferably a motor.

[0040] The initial clamping mechanism A also includes a swing assembly 15 for guiding the strip steel. The swing assembly 15 includes a swing arm 15a, a swing bracket 15b, a swing driver 15c, and a magnetic belt drive mechanism 15d. One end of the swing arm 15a is hinged to the first frame 11, the swing bracket 15b is fixed to the swing arm 15a, one end of the swing driver 15c is hinged to the first frame 11, and the other end of the swing driver 15c is hinged to the swing bracket 15b. The swing driver 15c is preferably a hydraulic cylinder. The swing bracket 15b has a clearance opening. The magnetic belt drive mechanism 15d is mounted on the swing bracket 15b and cooperates with the clearance opening.

[0041] There are two directions when the strip is threaded. Assuming the uncoiler is located to the left of the initial pinching mechanism A, the first direction is: after the steel coil is installed on the uncoiler, the coil winding direction is clockwise. At this time, the piston rod of the swing driver 15c extends, driving the swing bracket 15b to rotate clockwise, causing the swing bracket 15b to tilt to the upper left. The head of the strip is led out from top to bottom and reaches the swing assembly 15. Under the transmission action of the magnetic belt drive mechanism 15d, it is fed towards the first pinch roller group 12. In this state, the first drive component 14 drives the first upper pinch roller 12a to rotate. The first upper pinch roller 12a is the active roller, and the first lower pinch roller 12b is the passive roller.

[0042] The second direction is as follows: After the steel coil is installed on the uncoiler, the coil winding direction is counterclockwise. At this time, the piston rod of the swing driver 15c retracts, driving the swing bracket 15b to rotate counterclockwise, causing the swing bracket 15b to tilt downwards to the left. The head of the strip is led out from bottom to top and reaches the swing assembly 15. Under the transmission action of the magnetic belt drive mechanism 15d, it is fed towards the first pinch roller group 12. In this state, the first driver 13 drives the first lower pinch roller 12b to rotate. The first lower pinch roller 12b acts as the active roller, while the first upper pinch roller 12a acts as the passive roller.

[0043] The initial clamping mechanism A also includes a first cutting assembly, which is located downstream of the first clamping roller group 12 and mounted on the first frame. The first cutting assembly includes a first blade holder 16, a first cutter 17, and a first cutting driver 18. The first blade holder 16 is fixed to the first frame 11. The first cutting driver 18 consists of a first blade post 18a and a first hydraulic cylinder 18b. The first blade post 18a is fixed to the first frame 11, and the first hydraulic cylinder 18b is fixed to the first blade post 18a. The power output end of the first hydraulic cylinder is fixed to the first cutter 17. When it is necessary to cut the clamped strip, the first cutting driver 18 drives the first cutter 17 to move towards the first blade holder 16, thereby cutting the strip by the first cutter 17. Normally, the first cutting assembly is used to cut the head of the strip.

[0044] The stabilizing mechanism B includes a second frame 21, a first stabilizing roller group 22, and a second driver 23. The first stabilizing roller group 22 is mounted on the second frame 21, and the second driver 23 is connected to the first stabilizing roller group 22. The second frame 21 includes a base 21a and a first support mechanism 21b. The first stabilizing roller group 22 includes a first lower stabilizing roller assembly 22a and a first upper stabilizing roller assembly 22b. The first support mechanism 21b is mounted on the base 21a. The first support mechanism 21b includes a fixed seat 21b1, a movable frame 21b2, and a driving component 21b3. The fixed seat 21b1 is fixed to the base 21a, and the movable frame 21b2 is hinged to the fixed seat 21b1. One end of the driving component 21b3 is hinged to the fixed seat 21b1, and the other end of the driving component 21b3 is hinged to the movable frame 21b2. The driving component 21b3 is a cylinder or a hydraulic cylinder. The driving component 21b3 is hinged to both the fixed seat 21b1 and the movable frame 21b2. When the driving component 21b3 is working, it drives the movable frame 21b2 to rotate, and the first upper stabilizing roller assembly 22b rotates with the movable frame 21b2.

[0045] The first lower stabilizing roller assembly 22a and the first upper stabilizing roller assembly 22b are mounted on the first support mechanism 21b in a bottom-up configuration. The first lower stabilizing roller assembly 22a is mounted on the fixed base 21b1, and the first upper stabilizing roller assembly 22b is mounted on the movable frame 21b2. Either the first lower stabilizing roller assembly 22a or the first upper stabilizing roller assembly 22b is connected to the second driver 23. In this embodiment, the first lower stabilizing roller assembly 22a is located below the first upper stabilizing roller assembly 22b, and the second driver 23 is a motor. In this embodiment, the first upper stabilizing roller assembly 22b is pressed down by a hydraulic cylinder via the movable frame 21b2. This structure has the advantages of a large lever arm and good stability.

[0046] The first lower stabilizing roller assembly 22a includes a first lower stabilizing roller and a first bearing housing assembly. The first lower stabilizing roller is connected to the first bearing housing assembly, and the first bearing housing assembly is fixed to the fixed base 21b1. The first upper stabilizing roller assembly 22b includes a first upper stabilizing roller and a second bearing housing assembly. The first upper stabilizing roller is connected to the second bearing housing assembly, and the second bearing housing assembly is fixed to the movable frame 21b2. Both the first bearing housing assembly and the second bearing housing assembly consist of bearing housings and bearings installed within the bearing housings.

[0047] The stabilizing mechanism B also includes a second stabilizing roller group, which is located upstream of the first stabilizing roller group 22. The second stabilizing roller group includes a second support mechanism 24, a second upper stabilizing roller assembly 25, and a second lower stabilizing roller assembly 26. The second support mechanism 24 is located upstream of the first support mechanism 21b. The second upper stabilizing roller assembly 25 and the second lower stabilizing roller assembly 26 are mounted on the second support mechanism 24 in an up-down configuration.

[0048] The second support mechanism 24 includes a bracket 24a, a sliding seat 24b, a lifting driver 24c, and a lower support. The bracket 24a is fixed to the base 21a, and the sliding seat 24b is slidably engaged with the bracket 24a. The bracket 24a has a linear guide rail 24g, and the sliding seat 24b has a slider 24h, which is slidably engaged with the linear guide rail 24g. The second upper stabilizing roller assembly 25 is mounted on the sliding seat 24b. The second upper stabilizing roller assembly 25 includes a second upper stabilizing roller 25a and a third bearing seat assembly 25b. The second upper stabilizing roller 25a is connected to the third bearing seat assembly 25b, which consists of a bearing seat and a bearing installed inside the bearing seat.

[0049] The lifting actuator 24c is fixed to the bracket 24a and connected to the sliding seat 24b. The bracket 24a is in the shape of a door frame. The lifting actuator 24c is located on the top of the bracket 24a. The lifting actuator 24c consists of a fixed support and a cylinder or hydraulic cylinder. The fixed support is fixed to the bracket 24a and the hydraulic cylinder is fixed to the fixed support.

[0050] The lower support is fixed to the bracket 24a, and the second lower stabilizing roller assembly 26 is mounted on the lower support. The first center O1 of the second upper stabilizing roller assembly 25 is located on the first vertical line P1, and the second center O2 of the second lower stabilizing roller assembly 26 is located on the second vertical line P2. The first vertical line P1 and the second vertical line P2 are not on the same straight line. Since the strip passes through the second upper stabilizing roller assembly 25 and the second lower stabilizing roller assembly 26, the second upper stabilizing roller assembly 25 and the second lower stabilizing roller assembly 26 clamp the strip. Since the first vertical line P1 and the second vertical line P2 are not on the same straight line, the second upper stabilizing roller assembly 25 and the second lower stabilizing roller assembly 26 form a wrap angle with the strip, generating tension on the strip. Therefore, when the strip is cut by the disc shear, the strip is kept in a taut state by the action of the two sets of stabilizing rollers, namely the second upper stabilizing roller assembly 25 and the second lower stabilizing roller assembly 26, as well as the first lower stabilizing roller assembly 22a and the first upper stabilizing roller assembly 22b, thereby preventing the strip from slack and keeping the cut edge of the strip flat.

[0051] The lower support includes a support body 24d, an adjusting seat 24e, and an adjusting screw 24f. The end of the second lower stabilizing roller assembly 26 is located on the support body 24d. The adjusting seat 24e is fixed to the support body 24d. Adjusting seats 24e are provided on both sides of the end of the second lower stabilizing roller assembly 26. The adjusting screw 24f passes through the adjusting seat 24e and is threadedly connected to the adjusting seat 24e. The end of the second lower stabilizing roller assembly 26 is clamped by at least two adjusting screws 24f.

[0052] The second lower stabilizing roller assembly 26 includes a second lower stabilizing roller 26a, a fourth bearing housing assembly 26b, and an adjustable seat 26c. The second lower stabilizing roller 26a is connected to the fourth bearing housing assembly 26b, and the adjustable seat 26c is fixed to the side of the fourth bearing housing assembly 26b. The adjustable seat 26c is clamped between adjusting screws 24f.

[0053] As can be seen from the above, the second upper stabilizing roller assembly 25 is driven by a cylinder and pressed vertically under the guidance of the linear guide rail 24g and the slider 24h. The second upper stabilizing roller assembly 25 and the second lower stabilizing roller assembly 26 form a wrap angle with the strip. The position of the second lower stabilizing roller assembly 26 can be manually adjusted by adjusting the screw 24f, thereby adjusting the size of the wrap angle.

[0054] This embodiment also includes a guide mechanism located upstream of the second lower stabilizing roller assembly 26. The guide mechanism includes a mounting base 27a, a frame 27b, and multiple guide components. The mounting base 27a is fixed to the base 21a, the frame 27b is connected to the mounting base 27a, and the guide components are mounted on the frame 27b. Each guide component includes a guide frame 27c and a guide wheel 27d. The guide frame 27c is fixed to the frame 27b, and the guide wheel 27d is connected to the guide frame 27c. The guide wheels 27d on adjacent guide components are staggered.

[0055] The guiding mechanism also includes a swing drive component 27e. The frame 27b is hinged to the mounting base 27a, one end of the swing drive component 27e is hinged to the base 21a, and the other end of the swing drive component 27e is hinged to the frame 27b. When the strip is threaded, it can be pulled onto the guiding mechanism, and the supporting effect of the guiding mechanism reduces the traction burden.

[0056] The main clamping mechanism C includes a third frame 31, a second clamping roller group 32, and a third driver 33. The second clamping roller group 32 is mounted on the third frame 31, and the third driver 33 is connected to the second clamping roller group 32.

[0057] The second pinch roller assembly 32 includes a second upper pinch roller 32a, a second lower pinch roller 32b, a second upper bearing housing assembly 32c, a second lower bearing housing assembly 32d, and a second lifting driver 32e. Both ends of the second upper pinch roller 32a are connected to the second upper bearing housing assembly 32c, which is slidably fitted to the third frame 31. The second lifting driver 32e is fixed to the third frame 31, and its power output end is connected to the second upper bearing housing assembly 32c. The second lower pinch roller 32b is connected to the second lower bearing housing assembly 32d, which is fixed to the third frame 31. The third driver 33 is connected to the second lower pinch roller 32b via a universal coupling, and preferably uses a motor.

[0058] The main clamping mechanism C also includes a second drive component 34, which is connected to the second upper clamping roller 32a via a universal coupling. The second drive component 34 is preferably a motor.

[0059] The main clamping mechanism C also includes a guide table for guiding the strip steel. The guide table consists of a guide bracket 35 and a guide roller 36 mounted on the guide bracket 35. The guide roller 36 is rotatably mounted on the guide bracket 35. For example, a shaft and a bearing are provided on the guide bracket 35, wherein the shaft is fixed to the guide bracket 35, the bearing is engaged with the shaft, and the guide roller 36 is engaged with the bearing.

[0060] The main clamping mechanism C also includes a second cutting assembly 37, which is located downstream of the second clamping roller group and mounted on the third frame. The structure of the second cutting assembly is the same as that of the first cutting assembly, and will not be described in detail here.

[0061] The outlet clamping mechanism D includes a fourth frame 41, a third clamping roller group 42, a fourth driver 43, and a lifting pressure roller group. The third clamping roller group 42 is mounted on the fourth frame 41, the fourth driver 43 is connected to the third clamping roller group 42, and the lifting pressure roller group is mounted on the fourth frame 41 and located downstream of the third clamping roller group 42.

[0062] The third pinch roller assembly 42 includes a third upper pinch roller 42a, a third lower pinch roller 42b, a third upper bearing housing assembly 42c, a third lower bearing housing assembly 42d, and a third lifting driver 42e. Both ends of the third upper pinch roller 42a are connected to the third upper bearing housing assembly 42c, which is slidably fitted to the fourth frame 41. The third lifting driver 42e is fixed to the fourth frame 41, and its power output end is connected to the third upper bearing housing assembly 42c. The third lower pinch roller 42b is connected to the third lower bearing housing assembly 42d, which is also fixed to the fourth frame 41. The fourth driver 43 is connected to the third lower pinch roller 42b via a universal coupling, and preferably uses a motor.

[0063] The lifting pressure roller assembly includes a lifting drive mechanism 44, a bearing housing assembly 45, and a pressure roller 46. The lifting drive mechanism 44 is composed of a motor and a worm gear mechanism. The lifting drive mechanism 44 is fixed on the fourth frame 41. The bearing housing assembly 45 is slidably engaged with the fourth frame 41. The pressure roller 46 is connected to the bearing housing assembly 45.

[0064] Downstream of the outlet clamping mechanism D is the coiler. Therefore, when the strip is output from the outlet clamping mechanism D, the lifting drive mechanism 44 drives the bearing housing assembly 45 to move the pressure roller 46 toward the support platform. The pressure roller 46 applies pressure to the strip, so that the strip located between the clamping mechanism D and the coiler is in a tensioned state.

[0065] The outlet clamping mechanism D also includes a support platform located below the lifting pressure roller assembly. The support platform includes a rotating frame 47, a platform 48, and a rotating drive 49. The rotating frame 47 is hinged to the fourth frame 41, and the platform 48 is fixed to the rotating frame 47. One end of the rotating drive 49 is hinged to the fourth frame 41, and the other end is hinged to the rotating frame 47. The rotating drive 49 is preferably a hydraulic cylinder. The support platform facilitates the pulling of the strip head to the coiler.

[0066] In this embodiment, the roller surface diameter D of the first pinch roller group 12, the first stabilizing roller group 22, the second stabilizing roller group, the second pinch roller group 32, and the third pinch roller group 42 is 200-250mm. The calculation process for the roller surface diameter of the first pinch roller group 12, the first stabilizing roller group 22, the second stabilizing roller group, the second pinch roller group 32, and the third pinch roller group 42 is as follows:

[0067] 1) Given the following conditions: strip yield strength δ s Strip thickness t; strip width W; elastic modulus of strip material E; unit tension of strip δ t ;

[0068] 2) Determine the intermediate variables k, a, and S:

[0069] Calculate the elastic deformation rate k:

[0070]

[0071] In the above formula, D is the diameter of the roller surface;

[0072] Calculate the median shift 'a':

[0073]

[0074] Calculate the surface yield depth S of the strip:

[0075]

[0076] 3) Calculate the diameter D of the roller surface to be used:

[0077]

[0078] Based on the above formula, the diameter of each roller is comprehensively evaluated in conjunction with the data in Table 1 below.

[0079] Table 1

[0080]

[0081]

[0082] Factors to consider when selecting the diameter of each roller include space, structure, wear, and practical experience. The diameters of the first pinch roller group 12, the first stabilizing roller group 22, the second pinch roller group 32, and the third pinch roller group 42 are all 250mm. Specifically, the diameters of the first upper pinch roller 12a, the first lower pinch roller 12b, the first lower stabilizing roller assembly 22a, the first upper stabilizing roller assembly 22b, the second upper pinch roller 32a, the second lower pinch roller 32b, the third upper pinch roller 42a, and the third lower pinch roller 42b are all 250mm. The diameter of the second stabilizing roller group is 200mm, specifically the diameters of the second upper stabilizing roller 25a and the second lower stabilizing roller 26a.

[0083] The clamping speed of the small-diameter high-speed clamping equipment is less than 610 m / min. In this embodiment, the clamping speed is calculated in two ways according to different parameters. The calculation process of the first clamping speed is as follows:

[0084] 1) Given the following conditions: allowable total runout of the roller surface γ; allowable parallelism between roller surfaces b; roller surface length L0; bearing spacing L1; maximum spacing of the roller group L2; roller surface diameter D; empirical value λ;

[0085] 2) Calculate the intermediate variable, rotational speed N1:

[0086]

[0087] 3) Determine the maximum speed V to be used:

[0088] V = N1 × D × π × 60.

[0089] Based on the first formula for calculating the clamping speed mentioned above, the speed of the roller is comprehensively evaluated in conjunction with the data in Table 2 below.

[0090] Table 2

[0091]

[0092] In Table 2, the pinch rollers represent the first upper pinch roller 12a, the first lower pinch roller 12b, the second upper pinch roller 32a, the second lower pinch roller 32b, the third upper pinch roller 42a, and the third lower pinch roller 42b. Stabilizing roller #1 represents the first lower stabilizing roller assembly 22a and the first upper stabilizing roller assembly 22b, and stabilizing roller #2 represents the second upper stabilizing roller 25a and the second lower stabilizing roller 26a.

[0093] The calculation process for the second type of clamping speed is as follows:

[0094] 1) Given the following conditions: dynamic imbalance B; roller diameter D; roller weight M;

[0095] 2) Calculate the intermediate variable, rotational speed N2:

[0096] N² = 2.5 × M ÷ B ÷ π ÷ D

[0097] 3) Determine the maximum speed V to be used:

[0098] V = N² × D × π × 60.

[0099] Based on the second formula for calculating the pinch speed mentioned above, and combined with the data in Table 3 below, the speed of the roller is comprehensively evaluated.

[0100] Table 3

[0101]

[0102] Based on the speeds calculated in Tables 2 and 3, and after comprehensive evaluation, the highest possible conveying speed is V = 600 m / min.

[0103] Compared with the roller diameter in the background art, the roller diameter of each pinch roller in this embodiment is 250mm, and the stabilizing roller uses two roller diameters of 200mm and 250mm. In practical applications, the overall length of this structure is shortened by 1.235m. With the reduction in roller diameter, the weight is also reduced, the motor power is reduced by 47.5kW, the threading time per large roll is reduced by 10s, and the average moment of inertia of the roller is 25% of that of the large roller diameter. The pinching speed of this embodiment can reach 600m / min, which is a significant improvement compared to the pinching speed of 400m / min in the background art.

Claims

1. A high-speed clamping device for small-diameter strip steel, including: The starting clamping mechanism (A) includes a first frame (11), a first clamping roller group (12), and a first driver (13). The first clamping roller group (12) is mounted on the first frame (11), and the first driver (13) is connected to the first clamping roller group (12). The stabilizing mechanism (B) includes a second frame (21), a first stabilizing roller group (22), and a second driver (23). The first stabilizing roller group (22) is mounted on the second frame (21), and the second driver (23) is connected to the first stabilizing roller group (22). The main clamping mechanism (C) includes a third frame (31), a second clamping roller group (32), and a third driver (33). The second clamping roller group (32) is mounted on the third frame (31), and the third driver (33) is connected to the second clamping roller group (32). The outlet clamping mechanism (D) includes a fourth frame (41), a third clamping roller group (42), a fourth driver (43), and a lifting pressure roller group. The third clamping roller group (42) is mounted on the fourth frame (41), the fourth driver (43) is connected to the third clamping roller group (42), and the lifting pressure roller group is mounted on the fourth frame (41) and located downstream of the third clamping roller group (42). The characteristic feature is that the roller surface diameter D of the first pinch roller group (12), the first stabilizing roller group (22), the second pinch roller group (32) and the third pinch roller group (42) is 200-250mm; The calculation process for the roller surface diameters of the first pinch roller group (12), the first stabilizing roller group (22), the second pinch roller group (32), and the third pinch roller group (42) is as follows: 1) Given the following conditions: strip yield strength strip thickness ; strip width Elastic modulus of strip steel unit tension of strip steel ; 2) Find the intermediate variables , , : Calculate the elastic deformation rate : ； In the above formula, The diameter of the roller surface; Calculate the median shift : ； Calculate the surface yield depth of the strip steel : ； 3) Calculate the diameter D of the roller surface to be used:

2. The high-speed pinching device for small-diameter strip steel according to claim 1, characterized in that, The diameter of the roller surface of the first pinch roller group (12), the first stabilizing roller group (22), the second pinch roller group (32) and the third pinch roller group (42) is 250mm.

3. The high-speed pinching device for small-diameter strip steel according to claim 1, characterized in that, The stabilizing mechanism (B) also includes a second stabilizing roller group, which is located upstream of the first stabilizing roller group (22), and the roller surface diameter of the second stabilizing roller group is 200 mm.

4. The high-speed pinching device for small-diameter strip steel according to claim 1, characterized in that, The clamping speed of the small-diameter high-speed clamping equipment is less than 610 m / min.

5. The high-speed pinching device for small-diameter strip steel according to claim 4, characterized in that, The calculation process for the clamping speed is as follows: 1) Given the following conditions: allowable full runout of the roller surface Parallelism between roller surfaces is allowed. Roller surface length Bearing spacing Maximum spacing between rollers Roller diameter Experience points ; 2) Calculate the intermediate variable: rotational speed : ； 3) Determine the maximum speed to be used. :

6. The high-speed pinching device for small-diameter strip steel according to claim 4, characterized in that, The calculation process for the clamping speed is as follows: 1) Given the following conditions: dynamic imbalance Roller diameter Roller weight ; 2) Calculate the intermediate variable: rotational speed : ； 3) Determine the maximum speed to be used. :

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